CN201655694U - Contact system with short circuit protection function - Google Patents
Contact system with short circuit protection function Download PDFInfo
- Publication number
- CN201655694U CN201655694U CN2009202089673U CN200920208967U CN201655694U CN 201655694 U CN201655694 U CN 201655694U CN 2009202089673 U CN2009202089673 U CN 2009202089673U CN 200920208967 U CN200920208967 U CN 200920208967U CN 201655694 U CN201655694 U CN 201655694U
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- contact
- torsion spring
- snap close
- lock catch
- short circuit
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Abstract
The utility model relates to a contact system with short circuit protection function, which comprises a casing, a short circuit trip unit (6), an aluminium push rod (7), a static contact (8), a contact support (9), a moving contact (10) and a main circuit spring (11) arranged in the casing. The short circuit trip unit comprises a lock catch (1), a lock catch (2), a reaction torsion spring (4), a reaction torsion spring (5), a screw (3) and a movable iron core (6-2). The reaction torsion spring (4) is associated with the lock catch (1) and the lock catch (2) and enables the lock catch (1) to rotate along the L direction when the lock catch (2) is in a fixing state. The reaction torsion spring (5) is associated with a magnetic yoke (6-1) and the lock catch (2) is rotated along the H direction under the action of the reaction torsion spring. The screw (3) is adhered with the magnetic yoke (6-1) and is used for fixing the lock catch (1), the lock catch (2), the reaction torsion spring (4) and the reaction torsion spring (5). The scheme of the invention adopts the double-layer lock catch trip design and can effectively prevent the contact system from being burnt caused by contact bounce because the short circuit trip unit is shaken without affecting the short circuit trip property of the system, thereby greatly enhancing the product quality and the system reliability.
Description
Technical field
The utility model relates to a kind of contact system, relates in particular to a kind of contact system with short-circuit protection function, belongs to the low voltage electrical apparatus technology field.
Background technology
Contact system is the necessary component of device for switching, the electric current that major loop flows through when being responsible for connection, carrying and section breaker electrical work.
Control is a new product of low-voltage electrical apparatus with protection switch (CPS); control and defencive function that CPS realizes on the product of single version is integrated, internal coordination cooperates can substitute multiple traditional discrete devices such as circuit breaker (fuse), contactor, overload (or overcurrent, the phase failure) protection relay, starter, isolator.Its contact system not only will be connected, comprise the electric current under the operating overload condition of regulation under carrying and the disjunction normal condition, also wants to connect, the electric current under the non-normal condition of carrying at the appointed time and disjunction regulation, as short circuit current.Therefore the design of its contact system seems particularly complicated and important.
The patent No. is that the utility model patent of ZL 95227387.X discloses a kind of control and defencive function unit switch electrical equipment, and it comprises the mechanism of the on-off circuit that has one group of dynamic and static contact at least; The action of control contact is with the electromagnetism transmission mechanism of on-off circuit; Detection of excessive current and the protection that contact is disconnected are used and are impacted electromagnetic mechanism; Delete the arc control device that the sheet group constitutes by are-tight case that holds dynamic and static contact and the magnetic conduction of being located in it; The control contact that is connected in the electromagnetism transmission mechanism coil is controlled by operating mechanism, and then the described dynamic and static contact of break-make, finish overlond trip, short circuit dropout, shunted exciter tripping and thread off after button again.
The patent No. is the utility model patent of ZL 01238478.X; a kind of control and protection switch electrical equipment that becomes one with modular form is disclosed; comprise in base, contact group, electromagnetism transmission mechanism, the process; under the situation of some overcurrent; in the time of as motor starting, electric current does not also arrive product short-circuit protection operating mechanism, interrupter, overcurrent trip, interlocking device, current detecting relay.The formation of its contact group (contact system) is identical with patent ZL 95227387.X.
With above-mentioned two parts of contact systems that patent is announced, the control of the hard to bear electromagnetic system of energy, the operating current under connection, carrying, disjunction operate as normal and the overload situations.Its disjunction short circuit current probably is divided into two stages: the phase I: under the effect of short circuit current, contact is disconnected by the promotion of solenidal electromagnet and the electric repulsion acting in conjunction between the contact; Second stage: when contact disconnects, signal is passed to operating mechanism, operating mechanism drives electromagnetic system discharges electromagnetic system, makes contact remain on off-state.
Said structure has played high metering function, and the switch body short circuit current break-time that adopts this structure is in 3ms, and the current limliting coefficient reaches 0.2.But in actual production and use, also there is following problem:
When the production process bug check, the general mode of low-voltage and high-current that adopts is carried out the test of operating characteristics, because under low-voltage and high voltage situation, arc-gap voltage during the contact breaking current between contact differs greatly, constructed products for direct employing short circuit tripping coil breaking-off contact, under low voltage condition, the short circuit tripping coil disconnects contact fast, but because the intrinsic operate time that electromagnetism transmission mechanism itself action that keeps contact to disconnect exists, can not with the contact synchronization action, this will cause the contact to be in disconnection and on-state repeatedly, be contact disjunction and the big electric current of connection repeatedly, just can cause major injury at short notice contact system.
Action threshold values in that product uses can not disconnect contact.But the short circuit tripping coil still can produce electric power to push rod, and this electric power passes to contact, makes moving contact produce spring, thus the damage contact system.
Summary of the invention
The purpose of this utility model provides a kind of contact system with short-circuit protection function; this system not only can effectively connect, carrying, disjunction normal, overload, short circuit operating current; has higher current limliting coefficient; can also effectively avoid to improve the operational reliability and the product quality of product because contact system damage and product that contact bounce causes burn phenomenon.
For achieving the above object, the technical solution of the utility model is: a kind of contact system with short-circuit protection function comprises: the body, and be equipped with in this body: short-circuit release (6) is used to detect short circuit current, and sends action command when crossing threshold values; Aluminium push rod (7) is used for the trip signal of short-circuit release is passed to contact system; Fixed contact (8) is used to transmit main circuit current; Contact is supported (9), is used for fixing the tripping force of moving contact and interlock aluminium push rod; Moving contact (10) is used for connecting and the disjunction main circuit current, and this moving contact is a double-breakpoint structure; Main circuit spring (11) produces the excess of stroke and contact pressure to moving contact; Short-circuit release, this short-circuit release includes: snap close (1), as shown in Figure 1, be used for the aluminium push rod is carried out spacing, the button amount that itself and aluminium push rod produce is A; Snap close (2) as shown in Figure 1, is used for the aluminium push rod is carried out spacing, and the button amount that itself and aluminium push rod produce is B; Spring (4), reactive torsion spring, this torsion spring is associated with snap close (1) and snap close (2), as shown in Figure 3, supposes that snap close (2) is in stationary state, and this reaction spring will make snap close (1) rotate along the L direction.Spring (5), reactive torsion spring, this spring with and magnetic grip (6-1) and be associated, as shown in Figure 8, under the effect of this dried power spring, snap close (2) will rotate along the H direction.Screw (3) as shown in Figure 2, is gripped (6-1) and is binded mutually with magnetic, be used for fixing snap close (1), snap close (2) and reactive torsion spring (4), reactive torsion spring (5).Moving (6-2) unshakable in one's determination is used to send the short circuit trip signal, and when short circuit current surpassed threshold values, as shown in Figure 1, this moving iron core moved along the M direction.
The beneficial effects of the utility model are: this utility model scheme adopts double-deck snap close to thread off and designs, and as shown in Figure 1, the main distinction is that A button amount is greater than B button amount between bilayer.Adopt this scheme, when big electric current takes place, as not reaching the action threshold values, earlier by snap close 2 with its pinning, can either effectively avoid owing to the short-circuit release shake causes contact bounce to cause contact system to burn, do not influence the short circuit dropout performance of system again, improve the quality of products greatly and the reliability of system.
Below in conjunction with drawings and Examples to the utility model detailed explanation of making comparisons.
Description of drawings
Fig. 1 is internal structure of the present utility model (a remaining static) schematic diagram;
Fig. 2 is the complete section schematic diagram of short-circuit release of the present utility model;
Fig. 3 is a double-deck snap close schematic perspective view of the present utility model;
Fig. 4 is internal structure of the present utility model (short-circuit release is in a dither state) schematic diagram;
Fig. 5 is internal structure of the present utility model (short-circuit release is in a disjunction state) schematic diagram;
When Fig. 6 is a short-circuit release inactive state of the present utility model and the schematic diagram of operating mechanism push pedal;
Fig. 7 is that short-circuit release of the present utility model is when dither state and the schematic diagram of operating mechanism push pedal;
Fig. 8 is the schematic diagram of short-circuit release short circuit breaking state of the present utility model and operating mechanism push pedal.
Embodiment
With reference to Fig. 1, this is internal structure of the present utility model (a remaining static) schematic diagram.
As shown in the figure, contact system is when inactive state, and snap close (1) and snap close (2) are respectively A, B with the button amount that the aluminium push rod produces, and B button amount is less than A button amount.
When operate as normal, main circuit current flows into from P1, through the movable contact bridge, through short-circuit release, flows out from P2 again.
With reference to Fig. 2, this is the complete section schematic diagram of short-circuit release of the present utility model.When the electric current that flows into main circuit approaches the action threshold values of short-circuit release (6), moving iron core (6-1) in the short-circuit release (6) will produce shake under the effect of self reaction spring, when the distance of shake during greater than as shown in Figure 1 size G, to directly impact moving contact (10), promptly make moving contact (10) also produce shake, owing to the existence of main circuit current contact itself is caused damage simultaneously.
The utility model scheme has adopted double-deck shackle designs, measure G as Fig. 1, button amount B shown in Figure 7 less than button, when circuit trip device (6) when zero boundary's electric current produces shake, the distance of shake is passed through the lever transmission of aluminium push rod (7) formation to contact support (9), the shake of short-circuit release (6) is passed to the faying face that aluminium push rod and contact support (9) are ordered at D the most at last, as shown in Figure 4, drive contact support (9) when the M direction is moved above button amount B by the D point when aluminium push rod (7)
Snap close (2) rotates in the effect lower edge of reactive torsion spring (5) H direction, and carry out spacing to aluminium push rod (7) at the E point, at the F point push pedal (12) is acted on simultaneously, make push pedal (12) along the I direction disconnection electromagnetism transmission mechanism that moves, electromagnetism transmission mechanism adds an active force makes contact support (9) move along the M direction, thereby make moving contact (10) disconnect main circuit, as shown in Figure 7.
When the electric current that flows into main circuit far surpasses the action threshold values of short-circuit release (6), moving iron core (6-1) in the short-circuit release (6) will overcome counter-force and move along the M direction, this move distance passes through the lever transmission of aluminium push rod (7) formation to contact support (9), the shake of short-circuit release (6) is passed to the faying face that aluminium push rod and contact support (9) are ordered at D the most at last, as shown in Figure 5, when aluminium push rod (7) drives contact support (9) when the M direction is moved above button amount A by the D point, moving contact (10) will be in open position under the usefulness of aluminium push rod (7), it is opened apart from deducting button amount G for button amount A, snap close (2) rotates in the effect lower edge of reactive torsion spring (5) H direction simultaneously, snap close (1) also rotates along the H direction under the effect of reactive torsion spring (4), be that snap close (1) and snap close (2) all rotate along the H direction, snap close (1) carries out spacing at the E point to aluminium push rod (7), so that remaining button amount A, moving contact (10) deducts opening of button amount G apart from state, and snap close (2) acts on push pedal (12) at the F point, make push pedal (12) along the I direction disconnection electromagnetism transmission mechanism that moves, electromagnetism transmission mechanism adds an active force makes contact support (9) move along the M direction, thereby make moving contact (10) disconnect main circuit, as shown in Figure 8.
But the associated description in other service position processes of present embodiment or the patent documentation of 95227387.X in the principle reference background technology and 01238478.X does not repeat them here.
Though the utility model is described with reference to the above embodiments; but those of ordinary skill in the art; will be appreciated that above embodiment is used for illustrating the utility model; should understand and wherein can make variations and modifications and do not break away from the utility model in a broad sense; so be not that conduct is to qualification of the present utility model; as long as in connotation scope of the present utility model, to the variation of above-described embodiment, the protection range that distortion all will fall into the utility model claim.
Claims (3)
1. contact system with short-circuit protection function is by the body with place short-circuit release (6), aluminium push rod (7), fixed contact (8), contact support (9), moving contact (10), main circuit spring (11) in the body to form; It is characterized in that described release comprises: snap close (1), snap close (2), reactive torsion spring (4), reactive torsion spring (5), screw (3) and moving iron core (6-2); Described reactive torsion spring (4) is associated with snap close (1) and snap close (2), and when snap close (2) is in stationary state, this reaction spring will make snap close (1) rotate along the L direction; Described reactive torsion spring (5) is gripped (6-1) and is associated with magnetic, under the effect of this reaction spring, snap close (2) will rotate along the H direction; Described screw (3) is gripped (6-1) and is binded mutually with magnetic, be used for fixing snap close (1), snap close (2) and reactive torsion spring (4), reactive torsion spring (5).
2. contact system as claimed in claim 1,, it is characterized in that: snap close (1) is used for the aluminium push rod is carried out spacing, and the button amount that itself and aluminium push rod produce is A; Snap close (2) is used for the aluminium push rod is carried out spacing, and the button amount that itself and aluminium push rod produce is B; Contact system is when inactive state, and B button amount is less than A button amount.
3. contact system as claimed in claim 1,, it is characterized in that: described moving contact (10), be used for connecting and the disjunction main circuit current, this moving contact is a double-breakpoint structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202089673U CN201655694U (en) | 2009-09-21 | 2009-09-21 | Contact system with short circuit protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202089673U CN201655694U (en) | 2009-09-21 | 2009-09-21 | Contact system with short circuit protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201655694U true CN201655694U (en) | 2010-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202089673U Expired - Lifetime CN201655694U (en) | 2009-09-21 | 2009-09-21 | Contact system with short circuit protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201655694U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656178A (en) * | 2009-09-21 | 2010-02-24 | 浙江中凯科技股份有限公司 | Contact system with short circuit protection function |
| CN104183438A (en) * | 2014-04-11 | 2014-12-03 | 江苏中金输配电设备有限公司 | Intelligent control and protection device |
| CN104303251A (en) * | 2012-03-21 | 2015-01-21 | 泰科电子Amp有限责任公司 | Line protection switch |
| CN105185667A (en) * | 2015-10-06 | 2015-12-23 | 江苏新晨电气有限公司 | Novel energy-saving high-breaking control and protection switch |
| CN109473324A (en) * | 2018-10-31 | 2019-03-15 | 厦门安达兴电气集团有限公司 | Nonpolarity low-voltage circuit breaker |
| CN111627772A (en) * | 2020-05-29 | 2020-09-04 | 新驰电气集团有限公司 | Locking device for controlling and protecting switch electric appliance |
-
2009
- 2009-09-21 CN CN2009202089673U patent/CN201655694U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656178A (en) * | 2009-09-21 | 2010-02-24 | 浙江中凯科技股份有限公司 | Contact system with short circuit protection function |
| CN101656178B (en) * | 2009-09-21 | 2014-02-26 | 浙江中凯科技股份有限公司 | Contact system with short circuit protection function |
| CN104303251A (en) * | 2012-03-21 | 2015-01-21 | 泰科电子Amp有限责任公司 | Line protection switch |
| CN104303251B (en) * | 2012-03-21 | 2017-05-17 | 泰连德国有限公司 | line protection switch |
| CN104183438A (en) * | 2014-04-11 | 2014-12-03 | 江苏中金输配电设备有限公司 | Intelligent control and protection device |
| CN105185667A (en) * | 2015-10-06 | 2015-12-23 | 江苏新晨电气有限公司 | Novel energy-saving high-breaking control and protection switch |
| CN105185667B (en) * | 2015-10-06 | 2017-09-26 | 江苏新晨电气有限公司 | One kind energy-conservation high breaking type control and protective switch |
| CN109473324A (en) * | 2018-10-31 | 2019-03-15 | 厦门安达兴电气集团有限公司 | Nonpolarity low-voltage circuit breaker |
| WO2020087797A1 (en) * | 2018-10-31 | 2020-05-07 | 厦门安达兴电气集团有限公司 | Non-polarized low-voltage circuit breaker |
| CN111627772A (en) * | 2020-05-29 | 2020-09-04 | 新驰电气集团有限公司 | Locking device for controlling and protecting switch electric appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101124 |
|
| CX01 | Expiry of patent term |