CN2626104Y

CN2626104Y - Integrated electromagnetic starter

Info

Publication number: CN2626104Y
Application number: CN 03254748
Authority: CN
Inventors: 陈庆荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-04
Filing date: 2003-07-04
Publication date: 2004-07-14
Anticipated expiration: 2013-07-04

Abstract

The utility model provides an integrated electromagnetic starter, comprising a shell P and an internal circuit. The utility model is characterized in that the shell is a single shell, and the internal circuit is composed of a short circuit protection device (1), a relay (2), an overload protector (3), an electronic circuit board (4), an input wiring terminal (5), an output wiring terminal (6), a flap (7) and a circumscribed signal source wiring terminal (8). The utility model has an independent division of the protective functions of phase failure, overload and short circuit, but is still solidly arranged inside the single shell. The utility model has the advantages of simple structure, small occupying area, low cost and high liability. Other protective functions can also be added and arranged on the circuit board inside the same shell. The utility model is mainly used to control the start, operation and stop of the electric motor and to protect the phase failure, overload, short circuit and under voltage of the electric motor. The utility model can also be used to control the electric power source of the device, and protect the phase failure, overload, short circuit and under voltage of the electric power source. The utility model completes a primary main current that is originally connected by a plurality of independent electrical apparatus elements, and meanwhile completes a secondary current that controls the plurality of the independent electrical apparatus elements.

Description

Integrated electromagnetic starter

1, technical field

The utility model relates to electromagnetic starter.

2, background technology

At present; multi-functional (comprising defencive functions such as phase shortage, short circuit, under-voltage and electric leakage) electromagnetic starter is all added after housing forms " magnetic starter " by A.C. contactor, two independent electric elements of thermal relay, adds compositions such as button, low-voltage circuit breaker, open phase protector, earth leakage protective device.Form a control system promptly to the starting operation of motor, stop the control system of (the power supply control of equipment), the kinds of protect of holding concurrently; this system needs a plurality of independent electric elements to be connected, to have a plurality of shells; that its structure is disperseed, taken up room is big, complicated, production cost is high; failure rate is higher during use, is not easy to far distance automatic controlling.

3, summary of the invention

The purpose of this utility model provides a kind of mono-hull, multi-functional (comprising phase shortage, overload, short circuit, under-voltage, earth leakage protective etc.) can be nearby or at a distance, the integrated electromagnetic starter of the break-make of manual or automatic Control current.

Its purpose is realized by following technical proposals; it comprises housing P and internal circuit; its characteristics are: housing is single housing, and internal circuit is made of short-circuit protector (1), relay (2), overload protective device (3), electronic circuit board (4), input wires terminal (5), output wiring terminal (6), flap (7), outer signal source binding post (8).Three-phase ac power supply enters through input wires terminal (5); Binding post (5) is connected with short-circuit protector (1) by back panel wiring; The leading-out terminal of short-circuit protector (1) links to each other with relay (2) main contact; The leading-out terminal of relay (2) main contact is connected with overload protective device (3); The leading-out terminal of overload protective device is connected with output wiring terminal (6); Flap (7) one ends are articulated on the relay; The other end contacts with the auxiliary normally closed interlock of short-circuit protector; Circuit in the electronic circuit board (4) is made of one or more of open-phase protection circuit, under-voltage protecting circuit, leakage protection circuit.

Operation principle is as follows: short-circuit protector 1 has auxiliary normally closed interlock and anti-fusion welding device is backed down in short circuit, be short-circuited moment of fault at the Be Controlled circuit, the iron core of the screw magnetictrip of " short-circuit protector " moves rapidly, push auxiliary normally closed interlock earlier open, disconnect the working power of relay 2, line electrical equipment 2 main contacts are disconnected because of can not get closed electromagnetic attraction, thereby the open failure electric current reach the purpose of short-circuit protection; Simultaneously in order to improve short circuit breaking capacity; anti-fusion welding device is backed down in the short circuit of " short-circuit protector "; be short-circuited moment of fault at the Be Controlled circuit; the iron core of the screw magnetictrip of " short-circuit protector " moves rapidly; after pushing auxiliary normally closed interlock open, continue to move rapidly; promote flap 7 and transmission push rod; back down relay main contact 9; overcome the opening speed that remanent magnetism improves main contact on the one hand; thereby raising short circuit breaking capacity; short circuit top opening on the other hand can prevent to make contact melting welding because of the disjunction weak point high arc temperature that electric current produces the contact place of sleeping.

Relay 2 and main contact thereof are controlled by: the phase shortage in short-circuit protector 1 auxiliary normally closed interlock, overload protective device 3 auxiliary normally closed interlocks and the electronic circuit board or the control of other protective circuit control system, or closed or disconnection.

Overload protective device 3 be in operation at controlled power consumption equipment occur to surpass design load, be in operation occur lacking, the phase failure and when making other biphase current become big; the thermal element of overload protective device 3 can produce displacement regularly; promote auxiliary normally closed interlock; disconnect the working power of relay 2; relay 2 main contacts 9 are disconnected because of can not get closed electromagnetic attraction, thus the open failure electric current.

Electronic circuit board 4 is an open-phase protection circuit; adopt a certain in the three phase mains through step-down; trigger after the current limliting and be serially connected in the controllable silicon that another is gone up mutually; control its conducting or end; realize the energising work of a stature in two joints of control magnetic coil (execution is switched on or switched off principal current one time) or disconnect operating current; and third phase directly is connected another stature of magnetic coil; thereby when realizing the Ren Yiyi phase phase shortage of three phase mains; magnetic coil all can not be worked; to prevent the connection of threephase load electric current; realize open-phase protection completely, burn because of the phase shortage starting operation to avoid motor.

Because above-mentioned structure, though defencive functions such as the utility model phase shortage, overload, short circuit all have the independently division of labor, all solid is arranged in single housing.Its simple structure, take up room little, cost is low, the reliability height if will increase other defencive function and also all can be arranged on the electric line plate, all is positioned at same housing.Product is mainly used in the startup-move-stop, the phase shortage of double as motor, overload, short circuit, under voltage protection of control motor; Also be used for the power supply control of equipment, the overload of double as device power supply (DPS), short circuit, under voltage protection.It has finished a principal current that connected via a plurality of independently electric elements originally, has finished the secondary line of controlling above-mentioned a plurality of independent electric elements simultaneously.

4, description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 looks the surface structure schematic diagram for the right side of Fig. 1.

Fig. 3 is one of the utility model embodiment circuit theory diagrams.

5, embodiment

As Fig. 1,2,3, the utility model is made of housing P and internal circuit.Housing is single housing, and internal circuit is made of short-circuit protector 1, relay 2, overload protective device 3, electronic circuit board 4, input wires terminal 5, output wiring terminal 6, flap 7, outer signal source binding post 8.Three-phase ac power supply enters through input wires terminal 5; binding post 5 is connected with short-circuit protector 1 by back panel wiring, and the leading-out terminal of short-circuit protector 1 and relay 2 main contact devices 1, relay 2, overload protective device 3, electronic circuit board 4 input wires terminals 5, output connection termination 6, flap 7, outer signal source binding post 8 constitute.Three-phase ac power supply enters through input wires terminal 5; Binding post 5 is connected with short-circuit protector 1 by back panel wiring; The leading-out terminal of short-circuit protector 1 links to each other with relay 2 main contacts; The leading-out terminal of relay 2 main contacts is connected with overload protective device 3; The leading-out terminal of overload protective device is connected with output wiring terminal 6; Flap 7 one ends are articulated on the relay; The other end contacts with the auxiliary normally closed interlock of short-circuit protector.Be that (protective circuit of other function is picture slightly for open-phase protection circuit in the electronic circuit board 4; should understand); adopt a certain in the three phase mains through step-down; trigger after the current limliting and be serially connected in the controllable silicon that another is gone up mutually; control its conducting or end; realize the energising work of a stature in two joints of control magnetic coil (execution is switched on or switched off principal current one time) or disconnect operating current; and third phase directly is connected another stature of magnetic coil; thereby when realizing the Ren Yiyi phase phase shortage of three phase mains; magnetic coil all can not be worked; to prevent the connection of threephase load electric current; realize open-phase protection completely, burn because of the phase shortage starting operation to avoid motor.

As before chatting, this does not give unnecessary details for operation principle and advantage.

Claims

1, integrated electromagnetic starter; it comprises housing P and internal circuit; it is characterized in that: housing is single housing, and internal circuit is made of short-circuit protector (1), relay (2), overload protective device (3), electronic circuit board (4), input wires terminal (5), output wiring terminal (6), flap (7), outer signal source binding post (8).Three-phase ac power supply enters through input wires terminal (5); Binding post (5) is connected with short-circuit protector (1) by back panel wiring; The leading-out terminal of short-circuit protector (1) links to each other with relay (2) main contact; The leading-out terminal of relay (2) main contact is connected with overload protective device (3); The leading-out terminal of overload protective device is connected with output wiring terminal (6); Flap (7) one ends are articulated on the relay; The other end contacts with the auxiliary normally closed interlock of short-circuit protector; Circuit in the electronic circuit board (4) is made of one or more of open-phase protection circuit, under-voltage protecting circuit, leakage protection circuit.

2, integrated electromagnetic starter according to claim 1 is characterized in that: short-circuit protector has auxiliary normally closed interlock and short circuit and backs down and resist to hold together welder.