CN202816831U - A thermal overload relay with current transformers - Google Patents

A thermal overload relay with current transformers Download PDF

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Publication number
CN202816831U
CN202816831U CN 201220164345 CN201220164345U CN202816831U CN 202816831 U CN202816831 U CN 202816831U CN 201220164345 CN201220164345 CN 201220164345 CN 201220164345 U CN201220164345 U CN 201220164345U CN 202816831 U CN202816831 U CN 202816831U
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China
Prior art keywords
cavity
current transformer
shell wall
barrel
thermal overload
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Withdrawn - After Issue
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CN 201220164345
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Chinese (zh)
Inventor
何化敏
李伟
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Noark Electrics Shanghai Co Ltd
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Noark Electrics Shanghai Co Ltd
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Priority to CN 201220164345 priority Critical patent/CN202816831U/en
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Abstract

Provided is a thermal overload relay with current transformers. The integral double-layer housing body of the thermal overload relay is formed by a transversely-spread separating plate seat, a lengthways-spread barrel-shaped upper housing wall, and a lengthways-spread barrel-shaped lower housing wall. A thermal overload releaser is disposed inside an upper cavity while the three current transformers are disposed inside a lower cavity. Two lead wires of the secondary side of each current transformer enter the upper cavity from the lower cavity by through holes disposed at a position where the separating plate seat, the upper cavity, and the lower cavity intersect. The relay also comprises an L-side wire junction device and a T-side wire junction device which are disposed in the upper cavity. The L-side lead wire of each electrothermal device is connected with a lead wire of a corresponding current transformer through an L-side wire junction assembly, while the T-side lead wire of each electrothermal device is connected with the other lead wire of the corresponding current transformer through a T-side wire junction assembly. A relay panel is fixedly connected with the barrel-shaped upper housing wall. And all devices and the lead wires thereof are enclosed in the upper cavity and only terminals are extended out of the upper cavity from a window on the panel. A base plate is used for enclosing the current transformer components in the lower cavity of the double-layer housing body.

Description

The thermal overload relay of electrified current transformer
Technical field
The utility model relates to the two golden formula overload relays of heat of a kind of thermal overload relay, particularly a kind of electrified current transformer.
Background technology
Thermal overload relay is called for short thermal relay or thermal overload release, is the low-voltage electrical apparatus that is widely used in the overload protection of electrical load or alternating current motor, also can be combined into electromagnetic starter with contactor.The two golden formula overload relays of heat are the most frequently used a kind of thermal relays; it adopts has the bimetal leaf of time-delay characteristics as temperature-sensitive element; not only has overload protection function; but also has phase failure protection function; its using method is that two gold plaque series connection are accessed in the circuit of motor even load input sides; disconnected phase time appears in motor overload or three-phase line; can cause the electric current of at least one phase circuit to raise; make the two gold plaques bending owing to electrocaloric effect in this phase circuit of access; when two gold plaques bend to a certain degree; just trigger an actuating mechanism action of thermal overload relay; this action drives the conversion of a pair of electrical contact, realizes protection to motor and described circuit thereby control this control circuit to the electrical contact place.Yet, because the rated current of temperature-sensitive element is very limited, so when the electric current of load arrives greatly to a certain degree, the temperature-sensitive element of thermal overload relay can not directly be connected and be accessed in the circuit of motor even load input side, the two golden formula overload relays of instant heating are difficult to directly realize with thermo bimetal's sheet mode that this has just limited the use of thermal overload relay under large rated current.
In order to satisfy the requirement of using under the large rated current, in other words in order to strengthen the rated current of thermal overload relay, people attempt adopting current transformer and the method that thermal relay is combined, this thermal relay two golden formula overload relays of heat that normally rated current is less, to form the two golden formula overload relays of separate assembling heat that rated current is larger, for example the patent No. is the Chinese design patent of CN200630037545.6, a kind of existing separate assembling thermal overload relay is disclosed, adopt independently thermal overload release and one scheme that directly links together by a mounting panel of current transformer independently, the weight and volume of such thermal overload relay is all larger, and has serious potential safety hazard.Be engaged in for a long time the design, manufacturing of this area and the empirical discovery of after-sale service accumulation according to the applicant, there is following technical problem mostly in the separate assembling thermal overload relay of existing electrified current transformer: the one, and there is potential safety hazard in the line place of current transformer and thermal overload release.Outside the line place of current transformer and thermal overload release was directly exposed to, wiring place was easily become flexible, is disconnected or unexpected contact, if wiring place is loosening, disconnection, can form very large open circuit voltage, jeopardized personal safety.The 2nd, the potential safety hazard due to lead-in wire exposes.The lead-in wire that connects usefulness between current transformer and the thermal overload release has long part to be exposed in the air; although this lead-in wire has the insulating sleeve protection; but can not prevent that current transformer lead-in wire from being pulled or the accidental destruction such as scuffing, in case wire breaking easily causes the Personal Risk.The 3rd, the hidden danger due to the mechanical connection intensity difference.Existing current transformer and thermal overload release link together by mounting panel, and the thermal overload relay quality is larger, when installing or carry, and the mounting panel easy fracture.
The utility model content
The purpose of this utility model is to provide a kind of thermal overload relay that has overcome the electrified current transformer of defects, by the thermal overload release summation current transformer being integrated into the thermal overload relay of whole electrified current transformer, not only solved above-mentioned three large potential problems, and have more compact structure rationally, be easy to Installation and Debugging, convenient operation uses and dwindle the comprehensive advantage of small product size.
To achieve these goals, the utility model has adopted following technical scheme.
A kind of thermal overload relay of electrified current transformer, comprise thermal overload release 2 and with first, second, the 3rd current transformer 31,32,33 current transformer parts 3, thermal overload release 2 comprises first, second, the 3rd electric calorifie installation 211,212,213, normally closed interlock 223 and normally open contact 224, the thermal overload relay of this electrified current transformer also comprises a double Shell 1, it is the dividing plate seat 11 by extending transversely, the single piece that longitudinally extending barrel-shaped upper shell wall 12 and barrel-shaped lower shell wall 13 consist of, its median septum seat 11 and barrel-shaped upper shell wall 12 integrally formed and formation upper strata cavity 1S, dividing plate seat 11 and barrel-shaped lower the shell wall 13 integrally formed and formation cavity 1X of lower floor, described thermal overload release 2 is installed in the cavity 1S of upper strata, three current transformers 31,32,33 are installed in the cavity 1X of lower floor; Described first, second, third current transformer 31,32,33 secondary coil respectively have two lead-in wires 31a, 31b, 32a, 32b, 33a, 33b, be provided with through hole at dividing plate seat 11 and the position that upper strata cavity 1S and the cavity 1X of lower floor intersect jointly, enter upper strata cavity 1S so that lead-in wire 31a, 31b, 32a, 32b, 33a, the 33b of first, second, third current transformer 31,32,33 secondary coil pass described through hole from the cavity 1X of lower floor; Be provided with L side joint line apparatus 6 and T side joint line apparatus 7 in the cavity 1S of upper strata, described first, second, third electric calorifie installation 211,212,213 L side lead-in wire connect by a lead-in wire of L side joint line apparatus 6 and corresponding first, second, third current transformer 31,32,33 secondary coil, and described first, second, third electric calorifie installation 211,212,213 T side lead-in wire are by another connection that goes between of T side joint line apparatus 7 and corresponding first, second, third current transformer 31,32,33 secondary coil; Panel 4 and base plate 5, described panel 4 is fixedly connected with barrel-shaped upper shell wall 12 by syndeton 42, and lead-in wire 31a, 31b, 32a, 32b, 33a, the 33b of the L side of thermal overload release 2, L side joint line apparatus 6, T side joint line apparatus 7, electric calorifie installation lead-in wire 211a, 212a, 213a and T side lead-in wire 211b, 212b, 213b, first, second, third current transformer 31,32,33 secondary coil all be enclosed in the cavity 1S of upper strata, the binding post 95,96,97 of described thermal overload relay, 98 stretches out outside the cavity 1S of upper strata by the window 41 on the panel 4; Base plate 5 is fixedly connected with barrel-shaped lower shell wall 13 by the screw connecting structure 51 which is provided with, and current transformer parts 3 all is enclosed in the cavity 1X of lower floor of double Shell 1.
Preferably, the barrel-shaped upper shell wall 12 of described double Shell 1 is connected successively by the first Shell Plate 121, second housing plate 122, the 3rd Shell Plate 123 and the coverboard 124 of being connected all round and surrounds the rectangle barrel, and be provided with at least one first positioning bar 1211 in the inboard of the first Shell Plate 121, be provided with at least one second positioning bar 1221 in the inboard of second housing plate 122, be provided with at least one the 3rd positioning bar 1231 in the inboard of the 3rd Shell Plate 123, all round the inboard of coverboard 124 be provided with at least one the 4th positioning bar 1241.
Preferably, the first Shell Plate 121 of described barrel-shaped upper shell wall 12 arranges by relying on T side joint line apparatus 7, and the 3rd Shell Plate 123 arranges by relying on L side joint line apparatus 6; Be provided with at least two alternate division boards 1203 of T side in the inboard of the first Shell Plate 121, be provided with at least two alternate division boards 1202 of L side in the inboard of the 3rd Shell Plate 123; The position facing to T side joint line apparatus 7 on the first Shell Plate 121 is provided with the first recess 1210, and the position facing to T side joint line apparatus 7 on the first Shell Plate 121 is provided with the second recess 1230; Described panel 4 is provided with the first tongue lid 401 that matches with the first recess 1210, the second tongue lid 402 that matches with the second recess 1230, after panel 4 was fixedly connected with barrel-shaped upper shell wall 12 and puts in place, the first tongue lid 401, the second tongue lid 402 fastened with the first recess 1210, the second recess 1230 respectively.
Preferably, every phase connection assembly 61 of described L side joint line apparatus 6, or 62, or 63 comprise respectively the first tension disc 601, the first screw 602 and the first connecting plate 603; Each first tension disc 601 is provided with the first through hole, the first screw 602 pass behind the first through hole be located at the first connecting plate 603 on the first screw be threaded, and lead-in wire 31a, 32a, the 33a of the current transformer of L side lead-in wire 211a, 212a, 213a and the place phase of the electric calorifie installation of place phase is pressed between first tension disc 601 and the first connecting plate 603 of place phase simultaneously; The first connecting plate 603 is installed on the fixedly muscle 1201 on the barrel-shaped upper shell wall 12 in the upper strata cavity 1S of double Shell 1; Perhaps the first connecting plate 603 is installed on the case 20 of the thermal overload release 2 that is positioned at upper strata cavity 1S.
Preferably, each connector assembly 71 of described T side joint line apparatus 7, or 72, or 73 comprise respectively the second tension disc 701, the second screw 702 and the second connecting plate 703; Each second tension disc 701 is provided with the second through hole, the second screw 702 pass behind the second through hole be located at the second connecting plate 703 on the second screw be threaded; The second connecting plate 703 of each phase is connected with the T side lead-in wire 212b of the electric calorifie installation of place phase or 212b or 213b respectively, by the second screw 702 the lead-in wire 31b of each phase current mutual inductor or 32b or 33b is pressed on respectively between the second tension disc 701 and the second connecting plate 703; Perhaps, by the second screw 702 the lead-in wire 31b of the current transformer of the T side of the electric calorifie installation of place phase lead-in wire 211b or 212b or 213b and place phase or 32b or 33b are pressed between second tension disc 701 and the second connecting plate 703 of place phase simultaneously; The second connecting plate 703 is installed on the division board 2051 on the case 20 of the thermal overload release 2 in the cavity 1S of upper strata; Perhaps the second connecting plate 703 is installed on the gusset on the barrel-shaped upper shell wall 12 in the cavity 1S of upper strata.
Preferably, the syndeton 42 of described panel 4 comprise be arranged on the panel 4 have contact with 42 and the barrel-shaped upper shell wall 12 of double Shell 1 on hole clipping 125, have contact with 42 and be clasped with hole clipping 125, panel 4 is fixedly connected with barrel-shaped upper shell wall 12.
Preferably, described thermal overload release 2 comprises the case 20 that is fixedly connected with base 200, first, second, third electric calorifie installation 211,212,213, tripping mechanism 221, contact switching 222, normally closed interlock 223, normally open contact 224 be installed in respectively on the case 20 or case 20 in base 200 on, and three electric calorifie installations 211,212,213 L side lead-in wire 211a, 212a, 213a and T side lead-in wire 211b, 212b, 213b stretch out from case 20 respectively; Described case 20 comprises the first to the 5th shell wall 201,202,203,204,205, wherein the first shell wall 201, the second shell wall 202, the 3rd shell wall 203, the 4th shell wall 204 respectively with upper strata cavity 1S in barrel-shaped upper shell wall 12 on the first positioning bar 1211, the second positioning bar 1221, the 3rd positioning bar 1231, the 4th positioning bar 1241 contact and be positioned, base 200 contacts with dividing plate seat 11 and is positioned, and the 5th shell wall 205 contacts with panel 4 and is positioned.
According to an execution mode of the utility model thermal overload relay, described barrel-shaped lower shell wall 13 comprise the first shell wall 131, second housing wall 132, the 3rd shell wall 133, all round shell wall 134, the 5th vertical in muscle and the 6th vertical in muscle; The barrel-shaped body and the dividing plate seat 11 that are surrounded by first to fourth shell wall 131,132,133,134 form the cavity 1X of lower floor; Hold the first cavity that the first current transformer 31 is installed vertical by the 5th in muscle in the cavity 1X of lower floor separation and with the first shell wall 131, the 3rd shell wall 133, the shell wall 134, dividing plate seat 11 form all round; Hold the second cavity that the second current transformer 32 is installed vertical by the 5th in muscle, the 6th vertical in muscle in the cavity 1X of lower floor separation and form with the first shell wall 131, the 3rd shell wall 133, dividing plate seat 11; Hold the 3rd cavity that the 3rd current transformer 33 is installed vertical by the 6th in muscle in the cavity 1X of lower floor separation and form with the first shell wall 131, second housing wall 132, the 3rd shell wall 133, dividing plate seat 11, and described the first cavity, the second cavity, the 3rd cavity are in 11 one-tenths in-lines distributions of dividing plate seat; Described through hole is formed on the dividing plate seat 11 of the first cavity 1301, the second cavity 1302, the 3rd cavity 1303.
According to another execution mode of the utility model thermal overload relay, the barrel-shaped lower shell wall 13 of described double Shell 1 comprise the first shell wall 131, second housing wall 132, the 3rd shell wall 133, all round shell wall 134, transversal inner rib 135, first vertical in muscle 136, second vertical in muscle 137, the 3rd vertical in muscle 138 and the 4th vertical in muscle 139; The described cavity 1X of lower floor is comprised of barrel-shaped body and the dividing plate seat 11 that first to fourth shell wall 131,132,133,134 surrounds; Hold the first cavity 1301 that the first current transformer 31 is installed vertical by first in muscle 136, transversal inner rib 135 in the cavity 1X of lower floor separation and with the first shell wall 131, the shell wall 134, dividing plate seat 11 form all round; Hold the second cavity 1302 that the second current transformer 32 is installed vertical by the 3rd in muscle 138, the 4th vertical in muscle 139, transversal inner rib 135 in the cavity 1X of lower floor separation and form with the 3rd shell wall 133, dividing plate seat 11; Hold the 3rd cavity 1303 that the 3rd current transformer 33 is installed vertical by second in muscle 137, transversal inner rib 135 in the cavity 1X of lower floor separation and form with the first shell wall 131, second housing wall 132, dividing plate seat 11, and described the first cavity 1301, the second cavity 1302, the 3rd cavity 1303 distribute on dividing plate seat 11 in a triangle; Described through hole is formed on the dividing plate seat 11 of the first cavity 1301, the second cavity 1302, the 3rd cavity 1303.
Further, at least one first positioning convex 13f is located on the first shell wall 131 in described the first cavity 1301, and the first current transformer 31 is installed between the first positioning convex 13f and the transversal inner rib 135 and is positioned; At least one second positioning convex 13k is located on the 3rd shell wall 133 in described the second cavity 1302, and the second current transformer 32 is installed between the second positioning convex 13k and the transversal inner rib 135 and is positioned; At least one the 3rd positioning convex 13z is located on the first shell wall 131 in described the 3rd cavity 1303, and the 3rd current transformer 33 is installed between the 3rd positioning convex 13z and the transversal inner rib 135 and is positioned.
Further, first, second, third current transformer 31 or 32 or 33 includes secondary coil assembly 311,321,331, the first busbar L1, L2, L3, the second busbar T1, T2, T3 and attachment screw 310 in the described current transformer parts 3, each secondary coil assembly 311,321,331 is provided with feedthrough hole 3L1, a 3L2,3L3, each first busbar L1, L2, L3 are provided with at least one first screw hole L11, L21, L31, and each second busbar T1, T2, T3 are provided with at least one second screw hole T11, T21, T31; The 3rd shell wall 133 of described barrel-shaped lower shell wall 13 is provided with three the first busbar installing hole 13L1,13L2,13L3, and the first shell wall 131 of barrel-shaped lower shell wall 13 is provided with three the second busbar installing hole 13T1,13T2,13T3; The second busbar T1 of the first current transformer extend in the cavity 1X of lower floor after passing the feedthrough hole 3L1 of secondary coil assembly of the second corresponding busbar installing hole 13T1, the first current transformer, and the first busbar L1 of the first current transformer passes and extend into behind the first corresponding busbar installing hole 13L1 in the cavity 1X of lower floor and overlapping with the second busbar T1 of the first current transformer; The first busbar L2 of the second current transformer extend in the cavity 1X of lower floor after passing the feedthrough hole 3L2 of secondary coil assembly of the first corresponding busbar installing hole 13L2, the second current transformer, and the second busbar T2 of the second current transformer passes and extend into behind the second corresponding busbar installing hole 13T2 in the cavity 1X of lower floor and overlapping with the first busbar L2 of the second current transformer; The second busbar T3 of the 3rd current transformer extend in the cavity 1X of lower floor after passing the feedthrough hole 3L3 of secondary coil assembly of the second corresponding busbar installing hole 13T3, the 3rd current transformer, and the first busbar L3 of the 3rd current transformer passes and extend into behind the first corresponding busbar installing hole 13L3 in the cavity 1X of lower floor and overlapping with the second busbar T3 of the 3rd current transformer; Current transformer 31,32,33 the first busbar L1, L2, L3, the second busbar T1, T2, T3 are fixedly connected with the attachment screw 310 of described three current transformers separately by current transformer 31,32 separately, the first screw hole L11 of 33, L21, L31, the second screw hole T11, T21, T31 respectively.
Lead-in wire and electrical connection that the thermal overload relay of integration electrified current transformer of the present utility model has solved prior art expose problem, prevented be connected with the thermal overload release lead-in wire of electrical connection place and connection of current transformer to form the electric shock hidden danger that open-circuit over-voltage brings, avoided the interference of external environment condition to the thermal overload release performance, also avoided occuring unexpected use problem, and improved the structural strength of product integral body, not only avoided the parts distortion due to the unreasonable structure, cracking, the Problem of Failure such as fracture, and overcome the line complicated layout, the product erection space is large, large and the high problem of manufacturing cost of small product size, it is more convenient that product is used.
Description of drawings
Fig. 1 is the theory diagram of the thermal overload relay of electrified current transformer of the present utility model.
Fig. 2 is the overall structure block diagram according to the thermal overload relay of the electrified current transformer of the double-deck layout of employing of principle shown in Figure 1.
Fig. 3 is the monnolithic case schematic perspective view of the thermal overload relay of electrified current transformer of the present utility model.
Fig. 4 is the exploded perspective view of the thermal overload relay of electrified current transformer of the present utility model.
Fig. 5 is the profile schematic perspective view of thermal overload release parts in the thermal overload relay of electrified current transformer of the present utility model shown in Figure 3, there is shown the structure of a kind of embodiment of T side joint line apparatus.
Fig. 6 is the structural upright schematic diagram of upper strata cavity 1S of the thermal overload relay of electrified current transformer of the present utility model shown in Figure 3, is unkitted thermal overload release in the upper strata cavity 1S shown in the figure.
Fig. 7 is local form's schematic perspective view of the thermal overload relay of electrified current transformer of the present utility model shown in Figure 3, there is shown the structure of a kind of embodiment of L side joint line apparatus, in the upper strata cavity 1S shown in the figure thermal overload release is housed.
Fig. 8 is vertical view shown in Figure 7, there is shown to have loaded onto thermal overload release but situation when being unkitted top panel.
Fig. 9 is the structural upright schematic diagram of the cavity 1X of lower floor of double Shell of the first embodiment of the thermal overload relay of electrified current transformer of the present utility model, there is shown the first cavity 1301, the second cavity 1302, the 3rd cavity 1303 that three current transformers are installed and distribute in a triangle, be unkitted current transformer in the cavity 1X of lower floor shown in the figure.
Figure 10 is the assembling process schematic diagram of the current transformer of the first embodiment of the present utility model shown in Figure 9, there is shown current transformer that isosceles triangle distributes at the assembly structure of the cavity 1X of lower floor of double Shell.
Figure 11 be the first embodiment of the present utility model shown in Figure 9 by the distribute internal structure schematic diagram of the cavity 1X of lower floor behind the current transformer of loading onto of isosceles triangle, shown in the figure for not installing the situation of base plate.
Embodiment
Describe several embodiments of the thermal overload relay of electrified current transformer of the present utility model in detail below in conjunction with accompanying drawing 1-11, wherein Fig. 1-8 can be common to the first embodiment or second embodiment of the thermal overload relay of electrified current transformer of the present utility model, and Fig. 9-11 is only applicable to the first embodiment of the thermal overload relay of electrified current transformer of the present utility model, the current transformer of the first embodiment is the isosceles triangle setting, and the current transformer of the second embodiment is in-line setting (accompanying drawing is not shown).The thermal overload relay of electrified current transformer of the present utility model is not limited to the description of following examples.
Fig. 1 is the theory diagram of the thermal overload relay of electrified current transformer of the present utility model, there is shown annexation and control relation between each workpiece.Fig. 2 is overall structure block diagram shown in Figure 1, there is shown the integrated structure of double-deck layout.Fig. 3 is first embodiment of thermal overload relay of electrified current transformer of the present utility model or the monnolithic case schematic perspective view of the second embodiment, there is shown the face shaping of the integrated structure of double-deck layout.Fig. 4 is first embodiment of thermal overload relay of electrified current transformer of the present utility model shown in Figure 3 or the exploded perspective view of the second embodiment, there is shown necessary parts and the assembly relation between them thereof.Referring to Fig. 1 to 4, the thermal overload relay of electrified current transformer of the present utility model comprises thermal overload release 2 summation current transformer parts 3.Thermal overload release 2 is general thermal overload release, comprises electric calorifie installation, tripping mechanism 221, contact switching 222, normally closed interlock 223 and the normally open contact 224 of the two golden formulas of heat that three electric calorifie installations 211,212 and 213 consist of.Current transformer parts 3 comprise the current transformer 31 of three conventional structures, 32,33, three electric calorifie installations 211,212,213 with three current transformers 31,32,33 between be electrically connected as shown in Figure 2.Referring to Fig. 1, three Primary Conductor of three-phase electricity are by three the first busbar L1, or L2, or L3 respectively with three the second busbar T1, or T2, or the T3 correspondence is connected to form, specifically, the first busbar L1 and the second busbar T1 are connected to form the first-phase Primary Conductor, the first-phase Primary Conductor is passed the annular core (not shown) of the first current transformer 31, two lead-in wire 31a of the secondary coil that two terminations of the secondary coil on this annular core are exactly the first current transformer 31,31b, the 31a that wherein goes between is L side lead-in wire, and lead-in wire 31b is T side lead-in wire.In like manner, the second-phase Primary Conductor is connected to form by the first busbar L2 and the second busbar T2, the second-phase Primary Conductor is passed the annular core (not shown) of the second current transformer 32, two lead-in wires 32a, 32b of the secondary coil that two terminations of the secondary coil on this annular core are exactly the second current transformer 32, the 32a that wherein goes between is L side lead-in wire, and lead-in wire 32b is T side lead-in wire.The third phase Primary Conductor is connected to form by the first busbar L3 and the second busbar T3, the third phase Primary Conductor is passed the annular core (not shown) of the 3rd current transformer 33, two lead-in wires 33a, 33b of the secondary coil that two terminations of the secondary coil on this annular core are exactly the 3rd current transformer 33, the 33a that wherein goes between is L side lead-in wire, and lead-in wire 33b is T side lead-in wire.Two terminations of the first electric calorifie installation 211 (or two terminations and two wires be connected in series) form two lead-in wires 211a, 211b, and lead-in wire 211a is L side lead-in wire, and lead-in wire 211b is T side lead-in wire.In like manner, two terminations of the second electric calorifie installation 212 (or two terminations and two wires be connected in series) forms two lead-in wires 212a, 212b, and lead-in wire 212a is L side lead-in wire, and lead-in wire 212b is T side lead-in wire.Two terminations of the 3rd electric calorifie installation 213 (or two terminations and two wires be connected in series) form two lead-in wires 213a, 213b, and lead-in wire 213a is L side lead-in wire, and lead-in wire 213b is T side lead-in wire.Above-mentioned 6 pairs of lead-in wire minute corresponding connections, that is: the L side of the secondary coil of the first current transformer 31 of first-phase lead-in wire 31a meets the L side lead-in wire 211a of the first electric calorifie installation 211 of place phase, and the T side lead-in wire 31b of the secondary coil of the first current transformer 31 of first-phase meets the T side lead-in wire 211b of the first electric calorifie installation 211 of place phase; The L side lead-in wire 32a of the secondary coil of the second current transformer 32 of second-phase meets the L side lead-in wire 212a of the second electric calorifie installation 212 of place phase, and the T side lead-in wire 32b of the secondary coil of the second current transformer 32 of second-phase meets the T side lead-in wire 212b of the second electric calorifie installation 212 of place phase; The L side lead-in wire 33a of the secondary coil of the 3rd current transformer 33 of third phase meets the L side lead-in wire 213a of the 3rd electric calorifie installation 213 of place phase, and the T side lead-in wire 33b of the secondary coil of the 3rd current transformer 33 of third phase meets the T side lead-in wire 213b of the 3rd electric calorifie installation 213 of place phase.The binding post 95,96,97 of the thermal overload relay of electrified current transformer, 98 is the control signal output, normally closed interlock 223 is connected in series between two binding posts 95,96, normally open contact 224 is connected in series between two other binding post 97,98, described binding post is connected with controlled equipment or circuit (not shown) respectively, and described controlled equipment comprises the switchgear (such as circuit breaker) that is connected in series with the first busbar L1 or L2 or L3, the second busbar T1 or T2 or T3.When the electric current of any phase between the first busbar L1 or L2 or L3 and the second busbar T1 or T2 or the T3 surpasses the threshold value set when (comprising size of current and duration), the first electric calorifie installation 211 and/or 212 and/or 213 produces action and drives tripping mechanism 221 and contact switching 222 generation dropout actions, and normally closed interlock 223, normally open contact 224 conversion on/off states are ordered about in this dropout action.
Fig. 5 is the profile schematic perspective view of thermal overload release parts of the thermal overload relay of electrified current transformer of the present utility model shown in Figure 3, the structure of a kind of embodiment of T side joint line apparatus has been shown among Fig. 5, and the thermal overload release shown in the figure is a kind of general thermal overload release.Fig. 6 is the structural upright schematic diagram of the thermal overload relay upper strata cavity 1S of electrified current transformer of the present utility model shown in Figure 3, is unkitted thermal overload release in the upper strata cavity 1S shown in Fig. 6.Fig. 7 is local form's schematic perspective view of the thermal overload relay of electrified current transformer of the present utility model shown in Figure 3, the structure of a kind of embodiment of L side joint line apparatus has been shown among Fig. 7, different from the embodiment of Fig. 6, in the upper strata cavity 1S shown in Fig. 7 thermal overload release is housed.Fig. 8 is vertical view shown in Figure 7, there is shown to have loaded onto thermal overload release but situation when being unkitted top panel.
Referring to Fig. 2 to 8, the thermal overload relay of electrified current transformer of the present utility model also comprises a double Shell 1, L side joint line apparatus 6, T side joint line apparatus 7, panel 4 and base plate 5.Double Shell 1 comprises the dividing plate seat 11 of an extending transversely, a longitudinally extending barrel-shaped upper shell wall 12 and a longitudinally extending barrel-shaped lower shell wall 13.Here so-called " extending transversely " refers to stretch along the horizontal plane of X-direction, so-called " extending longitudinally " refers to stretch along the vertical guide of Y-direction, the lateral cross section that is understood that accordingly described longitudinally extending barrel-shaped upper shell wall 12 is closed-loop, is preferably straight-flanked ring, also can be the ring of other shape; The lateral cross section of described longitudinally extending barrel-shaped lower shell wall 13 is closed-loop, is preferably straight-flanked ring, also can be the ring of other shape.The dividing plate seat 11 of double Shell 1 consists of upper strata cavity 1S with barrel-shaped upper shell wall 12, and dividing plate seat 11 is integrated the same part that shapes with barrel-shaped upper shell wall 12, so, the upper strata cavity 1S that dividing plate seat 11 forms after intersecting with barrel-shaped upper shell wall 12 be one take dividing plate seat 11 as the bottom surface, barrel-shaped upper shell wall 12 as perisporium and above the cavity of opening.The dividing plate seat 11 of double Shell 1 consists of the cavity 1X of lower floor with barrel-shaped lower shell wall 13, and dividing plate seat 11 is integrated the same part that shapes with barrel-shaped lower shell wall 13, the cavity 1X of lower floor that dividing plate seat 11 forms after intersecting with barrel-shaped lower shell wall 13 be one take the cavity of dividing plate seat 11 as top, barrel-shaped lower shell wall 13 as perisporium, lower aperture.Because barrel-shaped upper shell wall 12 and barrel-shaped lower shell wall 13 are all integrally formed with dividing plate seat 11, so double Shell 1 is integral body common by barrel-shaped upper shell wall 12, barrel-shaped lower shell wall 13 and that dividing plate seat 11 consists of.All be installed on the whole double Shell 1 owing to will comprise each parts of the thermal overload relay of thermal overload release 2, current transformer parts 3, L side joint line apparatus 6 and T side joint line apparatus 7, so the mechanical strength that the installation of each parts connects is good especially.Be provided with three through hole 1f, 1k, 1z for leadthrough at the position of jointly intersecting with upper strata cavity 1S and the cavity 1X of lower floor of dividing plate seat 11, thermal overload release 2 is installed in the cavity 1S of upper strata, and three current transformers 31,32,33 are installed in respectively in the cavity 1X of lower floor.Two of the secondary coil of the first current transformer 31 lead-in wire 31a, 31b pass through hole 1f from the cavity of the cavity 1X of lower floor and enter upper strata cavity 1S, two lead-in wires 32a, 32b of the secondary coil of the second current transformer 32 pass through hole 1k from the cavity 1X of lower floor and enter upper strata cavity 1S, and two lead-in wires 33a, 33b of the secondary coil of the 3rd current transformer 33 pass through hole 1z from the cavity 1X of lower floor and enter upper strata cavity 1S.Because each lead-in wire of current transformer parts 3 all directly penetrates upper strata cavity 1S from the cavity 1X of lower floor, so the problem of having avoided lead-in wire to expose.The panel 4 of thermal overload relay is provided with window 41 and syndeton 42, panel 4 is fixedly connected with barrel-shaped upper shell wall 12 by syndeton 42, and with thermal overload release 2, L side joint line apparatus 6, T side joint line apparatus 7, the L side lead-in wire 212a of electric calorifie installation, 212a, 213a and T side lead-in wire 211b, 212b, 213b, current transformer 31,32, the lead-in wire 31a of 33 secondary coil, 31b, 32a, 32b, 33a, 33b all is enclosed in the cavity 1S of upper strata, and normally closed interlock 223 is connected the binding post 95 that connects thermal overload relay with normally open contact, 96,97,98 stretch out outside the cavity 1S of upper strata by window 41.Described syndeton 42 comprise on the panel 4 have contact with 42 and barrel-shaped upper shell wall 12 on hole clipping 125, have contact with 42 and be clasped with hole clipping 125, panel 4 is fixedly connected with barrel-shaped upper shell wall 12.The base plate 5 of thermal overload relay is provided with screw connecting structure 51, base plate 5 is connected by screw structure 51 and is fixedly connected with and three current transformers 31,32,33 all are enclosed in the cavity 1X of lower floor with barrel-shaped lower shell wall 13, and the opening of the cavity 1X of lower floor is hidden sealing.
T side joint line apparatus 7 shown in Figure 5 is arranged in the cavity 1S of upper strata, it comprises three connector assemblies 71,72,73, the T side lead-in wire 211b of the first electric calorifie installation 211 is connected with the lead-in wire 31b of the first current transformer 31 by the 4th connector assembly 71, the T side lead-in wire 212b of the second electric calorifie installation 212 is connected with the lead-in wire 32b of the second current transformer 32 by the 5th connector assembly 72, and the T side lead-in wire 213b of the 3rd electric calorifie installation 213 is connected with the 33b of the 3rd current transformer 33 by the 6th connector assembly 73.Each connector assembly 71,72,73 of T side joint line apparatus 7 respectively comprises the second tension disc 701, the second screw 702 and the second connecting plate 703, each second tension disc 701 is provided with the second through hole, the second connecting plate 703 is provided with the second screw, and the second screw 702 is threaded with the second screw after passing the second through hole.Under preferred version shown in Figure 5, the second connecting plate 703 of each phase is connected with the T side lead-in wire 211b of the electric calorifie installation of place phase or 212b or 213b respectively, so can be simply by the second screw 702 the lead-in wire 31b of each phase current mutual inductor or 32b or 33b be pressed on respectively between the second tension disc 701 and the second connecting plate 703. namely: the T side of the current transformer of the first-phase 31b that goes between is pressed between second tension disc 701 and the second connecting plate 703 of the 4th connector assembly 71; The T side lead-in wire 32b of the current transformer of second-phase is pressed between second tension disc 701 and the second connecting plate 703 of the 5th connector assembly 72; The T side lead-in wire 33b of the current transformer of third phase is pressed between second tension disc 701 and the second connecting plate 703 of the 6th connector assembly 73.The T side of electric calorifie installation lead-in wire 211b or 212b or 213b have finished in the case 20 of thermal overload release 2 and being connected of the second connecting plate 703, and the second connecting plate 703 has been fixedly connected on the case 20.The T side lead-in wire 211b of electric calorifie installation or 212b or 213b also can be connected with the second connecting plate 703 outside the case 20 of thermal overload release 2 as required, under this alternative, need to the lead-in wire 31b of the current transformer of the T side of the electric calorifie installation of place phase lead-in wire 211b or 212b or 213b and place phase or 32b or 33b be pressed between second tension disc 701 and the second connecting plate 703 of place phase simultaneously by the second screw 702, that is: the 4th connector assembly 71 of first-phase is pressed on the go between lead-in wire 31b of current transformer of 212b and place phase of the T side of the electric calorifie installation of place phase between the 4th connector assembly 71 second tension discs 701 and the second connecting plate 703 simultaneously; The 5th connector assembly 72 of second-phase is pressed on the lead-in wire 32b of the current transformer of the T side of the electric calorifie installation of place phase lead-in wire 212b and place phase between the 5th connector assembly 72 second tension discs 701 and the second connecting plate 703 simultaneously; The 6th connector assembly 73 of third phase is pressed on the lead-in wire 33b of the current transformer of the T side of the electric calorifie installation of place phase lead-in wire 213b and place phase between the 6th connector assembly 73 second tension discs 701 and the second connecting plate 703 simultaneously.Under this alternative scheme, the second connecting plate 703 can have two kinds of mounting meanss: a kind of is that the second connecting plate 703 is installed on the division board 2051 on the case 20 of the thermal overload release 2 in the cavity 1S of upper strata (as shown in Figure 5); Another kind is that the second connecting plate 703 is installed in (not shown) on the gusset on the barrel-shaped upper shell wall 12 in the cavity 1S of upper strata.Because three T side lead-in wire 211b, 212b, 213b of three T side lead-in wires 31b, 32b of T side joint line apparatus 7 and connection three current transformers thereon, 33b, three electric calorifie installations all are encapsulated in the cavity 1S of upper strata, have avoided being electrically connected the problem that exposes and go between and expose.
L side joint line apparatus 6 shown in Figure 7 is arranged in the cavity 1S of upper strata, it comprises three connector assemblies 61,62,63, the L side lead-in wire 211a of the first electric calorifie installation 211 is connected with the lead-in wire 31a of the first current transformer 31 by the first connector assembly 61, the L side lead-in wire 212a of the second electric calorifie installation 212 is connected with the lead-in wire 32a of the second current transformer 32 by the second connector assembly 62, and the L side lead-in wire 213a of the 3rd electric calorifie installation 213 is connected with the 33a of the 3rd current transformer 33 by the 3rd connector assembly 63.Every phase first connector assembly 61 or 62 or 63 of L side joint line apparatus 6 comprises the first tension disc 601, the first screw 602 and the first connecting plate 603, each first tension disc 601 is provided with the first through hole, the first connecting plate 603 is provided with the first screw, the first screw 602 is threaded with the first screw after passing the first through hole, and the lead-in wire 31a of the current transformer of the L side lead-in wire 211a of the electric calorifie installation of place phase or 212a or 213a and place phase or 32a or 33a are pressed between first tension disc 601 and the first connecting plate 603 of place phase simultaneously.That is: the first connector assembly 61 of first-phase is pressed on the lead-in wire 31a of the current transformer of the L side of the electric calorifie installation of place phase lead-in wire 211a and place phase between first tension disc 601 and the first connecting plate 603 of the first connector assembly 61 simultaneously, the second connector assembly 62 of second-phase is pressed on the lead-in wire 32a of the current transformer of the L side of the electric calorifie installation of place phase lead-in wire 212a and place phase between first tension disc 601 and the first connecting plate 603 of the second connector assembly 62 simultaneously, in like manner, the 3rd connector assembly 63 of third phase is pressed on the lead-in wire 33a of the current transformer of the L side of the electric calorifie installation of place phase lead-in wire 213a and place phase between first tension disc 601 and the first connecting plate 603 of the 3rd connector assembly 63 simultaneously.The first connecting plate 603 card insert types are installed in the mounting groove on the fixedly muscle 1201 on the barrel-shaped upper shell wall 12 in the cavity 1S of upper strata, and three the first connecting plates 603 of L side joint line apparatus 6 are installed in respectively on the different fixedly muscle 1201 on the barrel-shaped upper shell wall 12 in the cavity 1S of upper strata, in order to make three L side lead-in wire 31a of L side joint line apparatus 6 and connection three current transformers thereon, 32a, 33a, three L side lead-in wire 211a of three electric calorifie installations, 212a, 213a all is encapsulated in the cavity 1S of upper strata, thereby has avoided being electrically connected the problem that exposes and go between and expose.It is preferred scheme that the first connecting plate 603 is installed in respectively on the different fixedly muscle 1201 on the barrel-shaped upper shell wall 12 in the cavity 1S of upper strata, alternative scheme is, the first connecting plate 603 is installed in (not shown) on the 3rd shell wall 203 of case 20 of the thermal overload release 2 in the cavity 1S of upper strata.
The barrel-shaped upper shell wall 12 of the double Shell 1 of thermal overload relay comprises the first Shell Plate 121 that relies on T side joint line apparatus 7 and arrange, the 3rd Shell Plate 123 that relies on 6 settings of L side joint line apparatus, the position facing to T side joint line apparatus 7 on the first Shell Plate 121 is provided with the first recess 1210, and the position facing to T side joint line apparatus 7 on the first Shell Plate 121 is provided with the second recess 1230.The panel 4 of thermal overload relay is provided with the first tongue lid 401 that matches with the first recess 1210, the second tongue lid 402 that matches with the second recess 1230, after panel 4 was fixedly connected with the barrel-shaped upper shell wall 12 of double Shell 1 and puts in place, the first tongue lid 401, the second tongue lid 402 fastened with the first recess 1210, the second recess 1230 respectively.The structure of the first recess 1210 and the second recess 1230 is a kind of preferred schemes, and its purposes is the wiring assembling of being convenient to T side joint line apparatus 7, L side joint line apparatus 6, can omit this architectural feature in the situation that Installation and Debugging allow.In order to obtain better alternate electric isolation performance and to improve mutually safe class, can be provided with in the inboard of the first Shell Plate 121 two alternate division boards 1203 of T side, and be provided with two alternate division boards 1202 of L side in the inboard of the 3rd Shell Plate 123.
The thermal overload release 2 of thermal overload relay comprises base 200 and the case 20 that is fixedly connected with base 200, three electric calorifie installations 211,212,213, tripping mechanism 221, contact switching 222, normally closed interlock 223 and normally open contact 224 are installed in respectively on the base 200 or case 20 in the case 20, and electric calorifie installation 211,212,213 L side lead-in wire 212a, 212a, 213a and T side lead-in wire 212b, 212b, 213b stretch out from case 20 respectively.Case 20 comprises the first shell wall 201, the second shell wall 202, the 3rd shell wall 203, the 4th shell wall 204 and the 5th shell wall 205, the barrel-shaped upper shell wall 12 of the double Shell 1 of thermal overload relay comprises all round coverboard 124 of the first Shell Plate 121, second housing plate 122, the 3rd Shell Plate 123 and, be provided with two the first positioning bars 1211 at the first Shell Plate 121, be provided with two the second positioning bars 1221 at second housing plate 122, be provided with two the 3rd positioning bars 1231 at the 3rd Shell Plate 123, all round coverboard 124 be provided with two the 4th positioning bars 1241.Thermal overload release 2 is by the first shell wall 201 on its case 20, the second shell wall 202, the 3rd shell wall 203, the 4th shell wall 204 respectively with the first positioning bar 1211 of the barrel-shaped upper shell wall 12 of double Shell 1, the second positioning bar 1221, the 3rd positioning bar 1231,1241 contacts of the 4th positioning bar also are positioned, that is: contact the location by the first shell wall 201 on the thermal overload release 2 with the first positioning bar 1211 on the barrel-shaped upper shell wall 12, the second shell wall 202 on the thermal overload release 2 contacts the location with the second positioning bar 1221 on the barrel-shaped upper shell wall 12, the 3rd shell wall 203 on the thermal overload release 2 contacts the location with the 3rd positioning bar 1231 on the barrel-shaped upper shell wall 12, the 4th shell wall 204 on the thermal overload release 2 contacts the location with the 4th positioning bar 1241 on the barrel-shaped upper shell wall 12, is fixed in the horizontal direction simultaneously thereby thermal overload release 2 is installed in the cavity 1S of upper strata.The base 200 of thermal overload release 2 contacts with the dividing plate seat 11 of double Shell 1 and is positioned, the 5th shell wall 205 of the case 20 of thermal overload release 2 contacts with panel 4 and is positioned, so, base 200 by thermal overload release 2, the 5th shell wall 205 respectively with the location that contacts of the dividing plate seat 11 of double Shell 1, panel 4, thermal overload release 2 be encapsulated in the cavity 1S of upper strata and in vertical be fixed on the thermal overload relay.The first positioning bar 1211, the second positioning bar 1221, the 3rd positioning bar 1231, it is a kind of preferred scheme that the 4th positioning bar 1241 is respectively two, if reduce the installation location that the quantity of positioning bar also can realize thermal overload release 2, namely on preferred straight-flanked ring cross section barrel-shaped on the architecture basics of shell wall 12, barrel-shaped upper shell wall 12 comprises first to fourth Shell Plate 121-124, first to fourth Shell Plate 121-124 connects successively and surrounds the rectangle barrel, be provided with first positioning bar 1211 in the inboard of the first Shell Plate 121, be provided with second positioning bar 1221 in the inboard of second housing plate 122, be provided with the 3rd positioning bar 1231 in the inboard of the 3rd Shell Plate 123, all round the inboard of coverboard 124 be provided with the 4th positioning bar 1241.
Specify below in conjunction with Fig. 9-11 electrified current transformer of the present utility model thermal overload relay the first embodiment by the distribute assembly structure of the cavity 1X of lower floor behind the current transformer load onto of isosceles triangle.Fig. 9 is the structural upright schematic diagram of the cavity 1X of lower floor of double Shell, there is shown the first cavity 1301, the second cavity 1302, the 3rd cavity 1303 that three current transformers are installed and distribute in a triangle, be unkitted current transformer in the cavity 1X of lower floor shown in the figure.Figure 10 shows the current transformer of isosceles triangle distribution at the assembly structure of the cavity 1X of lower floor of double Shell.Figure 11 is shown in Figure 9 by the distribute internal structure schematic diagram of the cavity 1X of lower floor behind the current transformer of loading onto of isosceles triangle, shown in the figure for not installing the situation of base plate.
Referring to Fig. 9 to 11, double Shell barrel-shaped lower shell wall 13 comprise the first shell wall 131, second housing wall 132, the 3rd shell wall 133, all round shell wall 134, transversal inner rib 135, first vertical in muscle 136, second vertical in muscle 137, the 3rd vertical in muscle 138, the 4th vertical in muscle 139.The barrel-shaped body and the dividing plate seat 11 that are wherein surrounded by first to fourth shell wall 131-134 form the cavity 1X of lower floor, hold the first cavity 1301 that the first current transformer 31 is installed and be vertical by first in muscle 136, transversal inner rib 135, the first shell wall 131, all round shell wall 134 and dividing plate seat 11 surround, namely vertical by first in muscle 136, transversal inner rib 135 in the cavity 1X of lower floor separation and with the first shell wall 131, the shell wall 134, dividing plate seat 11 form and hold the first cavity 1301 that the first current transformer 31 is installed all round.Hold the second cavity 1302 that the second current transformer 32 is installed and be vertical by the 3rd in muscle 138, the 4th vertical in muscle 139, transversal inner rib 135, the 3rd shell wall 133, dividing plate seat 11 surround, namely vertical by the 3rd in muscle 138, the 4th vertical in muscle 139, transversal inner rib 135 in the cavity 1X of lower floor separation and form with the 3rd shell wall 133, dividing plate seat 11 and to hold the second cavity 1302 that the second current transformer 32 is installed.Hold the 3rd cavity 1303 that the 3rd current transformer 33 is installed and be vertical by second in muscle 137, transversal inner rib 135, the first shell wall 131, second housing wall 132, dividing plate seat 11 surround, namely vertical by second in muscle 137, transversal inner rib 135 in the cavity 1X of lower floor separation and form with the first shell wall 131, second housing wall 132, dividing plate seat 11 and to hold the 3rd cavity 1303 that the 3rd current transformer 33 is installed.Described the first cavity 1301, the second cavity 1302, the 3rd cavity 1303 are isosceles triangle at dividing plate seat 11 and distribute, and three through hole 1f, 1k, the 1z at the position of jointly intersecting with upper strata cavity 1S and the cavity 1X of lower floor that is arranged on dividing plate seat 11 are separately positioned on the dividing plate seat 11 of the first cavity 1301, the second cavity 1302, the 3rd cavity 1303.Two the first positioning convex 13f are located on the first shell wall 131 in the first cavity 1301, and the first current transformer 31 is installed between the first positioning convex 13f and the transversal inner rib 135 and is positioned.Two the second positioning convex 13k are located on the 3rd shell wall 133 in the second cavity 1302, and the second current transformer 32 is installed between the second positioning convex 13k and the transversal inner rib 135 and is positioned.Two the 3rd positioning convex 13z are located on the first shell wall 131 in the 3rd cavity 1303, and the 3rd current transformer 33 is installed between the 3rd positioning convex 13z and the transversal inner rib 135 and is positioned.If the first positioning convex 13f, the second positioning convex 13k, the 3rd positioning convex 13z are reduced to one, also can play positioning function.
Each current transformer 31,32,33 comprises secondary coil assembly 311 or the 321 or 331, first busbar L1 or L2 or L3, the second busbar T1 or T2 or T3 and three attachment screws 310.Each secondary coil assembly 311 or 321 or 331 comprises feedthrough hole 3L1, the 3L2, the 3L3 that usually are arranged on the support, each first busbar L1 or L2 or L3 are provided with first a screw hole L11 or L21 or L31, and each second busbar T1 or T2 or T3 are provided with second a screw hole T11 or T21 or T31.The 3rd shell wall 133 of the barrel-shaped lower shell wall 13 of double Shell 1 is provided with three the first busbar installing hole 13L1,13L2,13L3, and the first shell wall 131 of barrel-shaped lower shell wall 13 is provided with three the second busbar installing hole 13T1,13T2,13T3.The second busbar T1 extend in the cavity 1X of lower floor after passing the feedthrough hole 3L1 of the second busbar installing hole 13T1, secondary coil assembly, the first busbar L1 passes and extend into behind the first busbar installing hole 13L1 in the cavity 1X of lower floor and overlapping with the second busbar T1, and attachment screw 310 is fixedly connected with the first busbar L1 by the first screw hole L11, the second screw hole T11 with the second busbar T1.In like manner, the first busbar L2 extend in the cavity 1X of lower floor after passing the feedthrough hole 3L2 of the first busbar installing hole 13L2, secondary coil assembly, the second busbar T2 passes and extend into behind the second busbar installing hole 13T2 in the cavity 1X of lower floor and overlapping with the first busbar L2, and attachment screw 310 is fixedly connected with the first busbar L2 by the first screw hole L21, the second screw hole T21 with the second busbar T2.The second busbar T3 extend in the cavity 1X of lower floor after passing the feedthrough hole 3L3 of the second busbar installing hole 13T3, secondary coil assembly, the first busbar L3 passes and extend into behind the first busbar installing hole 13L3 in the cavity 1X of lower floor and overlapping with the second busbar T3, and attachment screw 310 is fixedly connected with the first busbar L1 by the first screw hole L31, the second screw hole T31 with the second busbar T1.
The characteristics of the first embodiment of the thermal overload relay of the electrified current transformer of the present utility model shown in Fig. 9 to 11 are that three current transformers 31,32,33 finished product words distribute, and advantage is to dwindle the volume of product, the length eurythmy of product.Obviously, also three current transformers 31,32,33 can be arranged to simplify in-line or other shapes of the structure of barrel-shaped lower shell wall 13 and lower chamber 1X.The below is distributed as example with in-line, further describes the second embodiment of the thermal overload relay of electrified current transformer of the present utility model.The barrel-shaped lower shell wall 13 of double Shell 1 comprise the first shell wall 131, second housing wall 132, the 3rd shell wall 133, all round among shell wall 134 and Fig. 1-8 the unshowned the 5th and the 6th vertical in muscle; The barrel-shaped body that first to fourth shell wall 131-134 surrounds and the dividing plate seat of double Shell 1 11 form the cavity 1X of lower floor, hold the first cavity that the first current transformer 31 is installed vertical by the 5th in muscle in the cavity 1X of lower floor separation and with the first shell wall 131, the 3rd shell wall 133, the shell wall 134 all round, dividing plate seat 11 forms together, hold the second cavity that the second current transformer 32 is installed vertical by the 5th in muscle, the 6th vertical in muscle in the cavity 1X of lower floor separation and with the first shell wall 131, the 3rd shell wall 133, dividing plate seat 11 forms together, hold the 3rd cavity that the 3rd current transformer 33 is installed vertical by the 6th in muscle in the cavity 1X of lower floor separation and with the first shell wall 131, second housing wall 132, the 3rd shell wall 133, dividing plate seat 11 forms together, and with above-mentioned the first cavity, the second cavity, the 3rd cavity distributes at 11 one-tenth in-lines of dividing plate seat, three through hole 1f at the position of jointly intersecting with upper strata cavity 1S and the cavity 1X of lower floor that is positioned at dividing plate seat 11,1k, 1z is separately positioned on the first cavity, the second cavity, on the dividing plate seat 11 of the 3rd cavity.

Claims (11)

1. the thermal overload relay of an electrified current transformer, comprise thermal overload release (2) and with the current transformer parts (3) of first, second, third current transformer (31,32,33), thermal overload release (2) comprises first, second, third electric calorifie installation (211,212,213), normally closed interlock (223) and normally open contact (224), it is characterized in that the thermal overload relay of described electrified current transformer also comprises:
A double Shell (1), it is the dividing plate seat (11) by extending transversely, the single piece that longitudinally extending barrel-shaped upper shell wall (12) and barrel-shaped lower shell wall (13) consist of, its median septum seat (11) is integrally formed and formation upper strata cavity (1S) with barrel-shaped upper shell wall (12), dividing plate seat (11) is integrally formed and formation lower floor's cavity (1X) with barrel-shaped lower shell wall (13), described thermal overload release (2) is installed in the upper strata cavity (1S), three current transformers (31,32,33) be installed in lower floor's cavity (1X);
The secondary coil of described first, second, third current transformer (31,32,33) respectively has two lead-in wires (31a, 31b, 32a, 32b, 33a, 33b), be provided with through hole at dividing plate seat (11) and the position that upper strata cavity (1S) and lower floor's cavity (1X) intersect jointly, enter upper strata cavity (1S) so that the lead-in wire (31a, 31b, 32a, 32b, 33a, 33b) of the secondary coil of first, second, third current transformer (31,32,33) passes described through hole from lower floor's cavity (1X);
Be provided with L side joint line apparatus (6) and T side joint line apparatus (7) in the upper strata cavity (1S), described first, second, the 3rd electric calorifie installation (211,212,213) L side lead-in wire is by L side joint line apparatus (6) and corresponding first, second, the 3rd current transformer (31,32, a lead-in wire of secondary coil 33) connects described first, second, the 3rd electric calorifie installation (211,212,213) T side lead-in wire is by T side joint line apparatus (7) and corresponding first, second, the 3rd current transformer (31,32,33) another lead-in wire of secondary coil connects;
Panel (4) and base plate (5), described panel (4) is fixedly connected with barrel-shaped upper shell wall (12) by syndeton (42), and with thermal overload release (2), L side joint line apparatus (6), T side joint line apparatus (7), the L side lead-in wire (211a of electric calorifie installation, 212a, 213a) with T side lead-in wire (211b, 212b, 213b), first, second, the 3rd current transformer (31,32, lead-in wire (the 31a of secondary coil 33), 31b, 32a, 32b, 33a, 33b) all be enclosed in the upper strata cavity (1S) binding post (95 of described thermal overload relay, 96,97,98) stretch out outside the upper strata cavity (1S) by the window (41) on the panel (4); Base plate (5) is fixedly connected with barrel-shaped lower shell wall (13) by the screw connecting structure (51) which is provided with, and current transformer parts (3) all is enclosed in lower floor's cavity (1X) of double Shell (1).
2. the thermal overload relay of electrified current transformer according to claim 1 is characterized in that:
The barrel-shaped upper shell wall (12) of described double Shell (1) is by the first Shell Plate (121), second housing plate (122), the 3rd Shell Plate (123) be connected all round coverboard (124) and connect successively and surround the rectangle barrel, and be provided with at least one first positioning bar (1211) in the inboard of the first Shell Plate (121), be provided with at least one second positioning bar (1221) in the inboard of second housing plate (122), be provided with at least one the 3rd positioning bar (1231) in the inboard of the 3rd Shell Plate (123), all round the inboard of coverboard (124) be provided with at least one the 4th positioning bar (1241).
3. the thermal overload relay of electrified current transformer according to claim 2 is characterized in that:
First Shell Plate (121) of described barrel-shaped upper shell wall (12) is by relying on T side joint line apparatus (7) setting, and the 3rd Shell Plate (123) is by relying on L side joint line apparatus (6) setting;
Be provided with at least two alternate division boards of T side (1203) in the inboard of the first Shell Plate (121), be provided with at least two alternate division boards of L side (1202) in the inboard of the 3rd Shell Plate (123);
The position facing to T side joint line apparatus (7) on the first Shell Plate (121) is provided with the first recess (1210), and the position facing to T side joint line apparatus (7) on the first Shell Plate (121) is provided with the second recess (1230); Described panel (4) is provided with the first tongue lid (401) that matches with the first recess (1210), the second tongue lid (402) that matches with the second recess (1230), after panel (4) was fixedly connected with barrel-shaped upper shell wall (12) and puts in place, the first tongue lid (401), the second tongue lid (402) fastened with the first recess (1210), the second recess (1230) respectively.
4. the thermal overload relay of electrified current transformer according to claim 1 is characterized in that:
Described barrel-shaped lower shell wall (13) comprise the first shell wall (131), second housing wall (132), the 3rd shell wall (133), all round shell wall (134), the 5th vertical in muscle and the 6th vertical in muscle; The barrel-shaped body and the dividing plate seat (11) that are surrounded by first to fourth shell wall (131,132,133,134) form lower floor's cavity (1X); Hold the first cavity that the first current transformer (31) is installed vertical by the 5th in muscle in lower floor's cavity (1X) separation and with the first shell wall (131), the 3rd shell wall (133), the shell wall (134), dividing plate seat (11) form all round; Hold the second cavity that the second current transformer (32) is installed vertical by the 5th in muscle, the 6th vertical in muscle in lower floor's cavity (1X) separation and form with the first shell wall (131), the 3rd shell wall (133), dividing plate seat (11); Hold the 3rd cavity that the 3rd current transformer (33) is installed vertical by the 6th in muscle lower floor's cavity (1X) in separation and form with the first shell wall (131), second housing wall (132), the 3rd shell wall (133), dividing plate seat (11), and described the first cavity, the second cavity, the 3rd cavity become the in-line distribution at dividing plate seat (11); Described through hole is formed on the dividing plate seat (11) of the first cavity (1301), the second cavity (1302), the 3rd cavity (1303).
5. the thermal overload relay of electrified current transformer according to claim 1 is characterized in that:
The barrel-shaped lower shell wall (13) of described double Shell (1) comprise the first shell wall (131), second housing wall (132), the 3rd shell wall (133), all round shell wall (134), transversal inner rib (135), first vertical in muscle (136), second vertical in muscle (137), the 3rd vertical in muscle (138) and the 4th vertical interior muscle (139); Described lower floor cavity (1X) is comprised of barrel-shaped body and the dividing plate seat (11) that first to fourth shell wall (131,132,133,134) surrounds; Hold the first cavity (1301) that the first current transformer (31) is installed vertical by first in muscle (136), transversal inner rib (135) in lower floor's cavity (1X) separation and with the first shell wall (131), the shell wall (134), dividing plate seat (11) form all round; Hold the second cavity (1302) that the second current transformer (32) is installed vertical by the 3rd in muscle (138), the 4th vertical in muscle (139), transversal inner rib (135) in lower floor's cavity (1X) separation and form with the 3rd shell wall (133), dividing plate seat (11); Hold the 3rd cavity (1303) that the 3rd current transformer (33) is installed vertical by second in muscle (137), transversal inner rib (135) lower floor's cavity (1X) in separation and form and described the first cavity (1301), the second cavity (1302), the 3rd cavity (1303) in a triangle distribution on dividing plate seat (11) with the first shell wall (131), second housing wall (132), dividing plate seat (11); Described through hole is formed on the dividing plate seat (11) of the first cavity (1301), the second cavity (1302), the 3rd cavity (1303).
6. the thermal overload relay of electrified current transformer according to claim 5 is characterized in that:
In the described current transformer parts (3) first, second, the 3rd current transformer (31, or 32, or 33) include secondary coil assembly (311,321,331), the first busbar (L1, L2, L3), the second busbar (T1, T2, T3) and attachment screw (310), each secondary coil assembly (311,321,331) be provided with a feedthrough hole (3L1,3L2,3L3), each first busbar (L1, L2, L3) be provided with at least one first screw hole (L11, L21, L31), each second busbar (T1, T2, T3) be provided with at least one second screw hole (T11, T21, T31);
The 3rd shell wall (133) of described barrel-shaped lower shell wall (13) is provided with three the first busbar installing holes (13L1,13L2,13L3), and first shell wall (131) of barrel-shaped lower shell wall (13) is provided with three the second busbar installing holes (13T1,13T2,13T3);
Second busbar (T1) of the first current transformer extend in lower floor's cavity (1X) after passing the feedthrough hole (3L1) of secondary coil assembly of the second corresponding busbar installing hole (13T1), the first current transformer, and first busbar (L1) of the first current transformer passes and extend into behind the first corresponding busbar installing hole (13L1) in lower floor's cavity (1X) and overlapping with second busbar (T1) of the first current transformer;
First busbar (L2) of the second current transformer extend in lower floor's cavity (1X) after passing the feedthrough hole (3L2) of secondary coil assembly of the first corresponding busbar installing hole (13L2), the second current transformer, and second busbar (T2) of the second current transformer passes and extend into behind the second corresponding busbar installing hole (13T2) in lower floor's cavity (1X) and overlapping with first busbar (L2) of the second current transformer;
Second busbar (T3) of the 3rd current transformer extend in lower floor's cavity (1X) after passing the feedthrough hole (3L3) of secondary coil assembly of the second corresponding busbar installing hole (13T3), the 3rd current transformer, and first busbar (L3) of the 3rd current transformer passes and extend into behind the first corresponding busbar installing hole (13L3) in lower floor's cavity (1X) and overlapping with second busbar (T3) of the 3rd current transformer;
The attachment screw of described three current transformers (310) respectively the first screw hole (L11, L21, L31) by current transformer (31,32,33) separately, the second screw hole (T11, T21, T31) will the first busbar (L1, L2, L3), second busbar (T1, T2, T3) of current transformer (31,32,33) be fixedly connected with separately.
7. the thermal overload relay of electrified current transformer according to claim 5 is characterized in that:
At least one first positioning convex (13f) is located on interior the first shell wall (131) of described the first cavity (1301), and the first current transformer (31) is installed between the first positioning convex (13f) and the transversal inner rib (135) and is positioned; At least one second positioning convex (13k) is located on interior the 3rd shell wall (133) of described the second cavity (1302), and the second current transformer (32) is installed between the second positioning convex (13k) and the transversal inner rib (135) and is positioned; At least one the 3rd positioning convex (13z) is located on interior the first shell wall (131) of described the 3rd cavity (1303), and the 3rd current transformer (33) is installed between the 3rd positioning convex (13z) and the transversal inner rib (135) and is positioned.
8. the thermal overload relay of electrified current transformer according to claim 1 is characterized in that:
Every phase connection assembly of described L side joint line apparatus (6) (61, or 62, or 63) comprises respectively the first tension disc (601), the first screw (602) and the first connecting plate (603);
Each first tension disc (601) is provided with the first through hole, the first screw (602) pass behind the first through hole be located at the first connecting plate (603) on the first screw be threaded, and the lead-in wire (31a, 32a, 33a) of the current transformer of the L side lead-in wire (211a, 212a, 213a) of the electric calorifie installation of place phase and place phase is pressed between first tension disc (601) and the first connecting plate (603) of place phase simultaneously;
The first connecting plate (603) is installed on the fixedly muscle (1201) on the barrel-shaped upper shell wall (12) in the upper strata cavity (1S) of double Shell (1); Perhaps the first connecting plate (603) is installed on the case (20) of the thermal overload release (2) that is positioned at upper strata cavity (1S).
9. the thermal overload relay of electrified current transformer according to claim 1 is characterized in that:
Each connector assembly of described T side joint line apparatus (7) (71, or 72, or 73) comprises respectively the second tension disc (701), the second screw (702) and the second connecting plate (703); Each second tension disc (701) is provided with the second through hole, the second screw (702) pass behind the second through hole be located at the second connecting plate (703) on the second screw be threaded;
Second connecting plate (703) of each phase is connected with the T side lead-in wire (212b or 212b or 213b) of the electric calorifie installation of place phase respectively, is pressed on respectively between the second tension disc (701) and the second connecting plate (703) by the lead-in wire (31b or 32b or 33b) of the second screw (702) with each phase current mutual inductor; Perhaps, be pressed on simultaneously between second tension disc (701) and the second connecting plate (703) of place phase by the lead-in wire (31b or 32b or 33b) of the second screw (702) with the current transformer of the T side of the electric calorifie installation of place phase lead-in wire (211b or 212b or 213b) and place phase;
The second connecting plate (703) is installed on the division board (2051) on the case (20) of the thermal overload release (2) in the upper strata cavity (1S); Perhaps the second connecting plate (703) is installed on the gusset on the barrel-shaped upper shell wall (12) in the upper strata cavity (1S).
10. the thermal overload relay of electrified current transformer according to claim 1 is characterized in that:
The syndeton (42) of described panel (4) comprises the hole clipping (125) on the barrel-shaped upper shell wall (12) that has contact with (42) and double Shell (1) that is arranged on the panel (4), have contact with (42) and be clasped with hole clipping (125), panel (4) is fixedly connected with barrel-shaped upper shell wall (12).
11. the thermal overload relay of electrified current transformer according to claim 2 is characterized in that:
Described thermal overload release (2) comprises the case (20) that is fixedly connected with base (200), first, second, the 3rd electric calorifie installation (211,212,213), tripping mechanism (221), contact switching (222), normally closed interlock (223), normally open contact (224) is installed in respectively on the base (200) that case (20) is upper or case (20) is interior, and three electric calorifie installations (211,212,213) L side lead-in wire (211a, 212a, 213a) with T side lead-in wire (211b, 212b, 213b) stretch out from case (20) respectively;
Described case (20) comprises the first to the 5th shell wall (201,202,203,204,205), the first shell wall (201) wherein, the second shell wall (202), the 3rd shell wall (203), the 4th shell wall (204) respectively with upper strata cavity (1S) in barrel-shaped upper shell wall (12) on the first positioning bar (1211), the second positioning bar (1221), the 3rd positioning bar (1231), the 4th positioning bar (1241) contacts and is positioned, base (200) contacts with dividing plate seat (11) and is positioned, and the 5th shell wall (205) contacts with panel (4) and is positioned.
CN 201220164345 2012-04-17 2012-04-17 A thermal overload relay with current transformers Withdrawn - After Issue CN202816831U (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102709128A (en) * 2012-04-17 2012-10-03 上海诺雅克电气有限公司 Thermal overload relay with current transformers
CN105244840A (en) * 2015-09-21 2016-01-13 洛阳新思路电气股份有限公司 Overloading alarm protection device for power system
CN105448613A (en) * 2014-08-15 2016-03-30 施耐德电气工业公司 Release used for breaker
CN106229229A (en) * 2016-10-08 2016-12-14 德力西电气有限公司 A kind of protector of current mutual inductor of band arc baffle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102709128A (en) * 2012-04-17 2012-10-03 上海诺雅克电气有限公司 Thermal overload relay with current transformers
CN102709128B (en) * 2012-04-17 2014-09-10 上海诺雅克电气有限公司 Thermal overload relay with current transformers
CN105448613A (en) * 2014-08-15 2016-03-30 施耐德电气工业公司 Release used for breaker
CN105244840A (en) * 2015-09-21 2016-01-13 洛阳新思路电气股份有限公司 Overloading alarm protection device for power system
CN106229229A (en) * 2016-10-08 2016-12-14 德力西电气有限公司 A kind of protector of current mutual inductor of band arc baffle
CN106229229B (en) * 2016-10-08 2019-05-10 德力西电气有限公司 A kind of protector of current mutual inductor with arc baffle

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