CN209896006U

CN209896006U - Take surge protection's moulded case circuit breaker

Info

Publication number: CN209896006U
Application number: CN201921265116.2U
Authority: CN
Inventors: 支朝乾
Original assignee: Haig Polytron Technologies Inc
Current assignee: Haig Polytron Technologies Inc
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-01-03
Anticipated expiration: 2029-08-06

Abstract

The utility model relates to a take surge protection's moulded case circuit breaker, including base, well seat, the upper cover that sets gradually, be provided with A looks return circuit, B looks return circuit, C looks return circuit, N looks return circuit on the base, be provided with the wiring board on the well seat, the surge protection module who is connected with the wiring board, be formed with the electrically conductive clamping piece of multi-disc on the wiring board, electrically conductive clamping piece is connected with A looks return circuit, B looks return circuit, C looks return circuit, N looks return circuit electricity respectively, form the electrically conductive inserted sheet of multi-disc on the surge protection module, the surge protection module forms the electricity with the wiring board through the cooperation of electrically conductive inserted sheet and electrically conductive clamping piece and is connected. The utility model discloses a moulded case circuit breaker is under the condition that does not increase the size and dimension, installs the surge protection module of taking the lightning protection function, and the change in the later stage is convenient for to the modular mounting means, and can protect follow-up circuit when the switch board is struck by lightning, makes user's household electrical appliances not receive the damage.

Description

Take surge protection's moulded case circuit breaker

Technical Field

The utility model relates to a moulded case circuit breaker especially relates to a take surge protection's moulded case circuit breaker.

Background

The molded case circuit breaker can automatically cut off the current after the current exceeds the trip setting, and the overcurrent and short circuit protection of the circuit is realized. The moulded case circuit breaker is installed in the switch board usually, moulded case circuit breaker's one side electricity is connected on female arranging by transformer output, moulded case circuit breaker's opposite side electricity is connected to user's family circuit, though be provided with ground protection on the transformer, transformer ground connection is unstable, and the distance of transformer to moulded case circuit breaker is usually far away from the distance of moulded case circuit breaker to user's family, consequently when the switch board suffered the thunderbolt, the ultrahigh voltage in the twinkling of an eye that the thunderbolt produced often can not carry out charge release through transformer ground connection, directly can lead to user's family on the contrary, cause the damage of burning out of the consumer of user.

Disclosure of Invention

In view of this, the utility model aims to provide a take surge protection's moulded case circuit breaker under the condition that does not increase moulded case circuit breaker volume, the surge protection module of lightning protection function is taken in the installation, and it is convenient to change, can protect follow-up circuit when the switch board is struck by lightning, makes user's family electrical apparatus not receive the damage.

In order to realize above purpose, the utility model discloses a such take surge protection's moulded case circuit breaker, including base, well seat, the upper cover that sets gradually, be provided with A looks return circuit, B looks return circuit, C looks return circuit, N looks return circuit on the base, be provided with the wiring board on the well seat, with the surge protection module that the wiring board is connected, be formed with the electrically conductive clamping piece of multi-disc on the wiring board, electrically conductive clamping piece is connected with A looks return circuit, B looks return circuit, C looks return circuit, N looks return circuit electricity respectively, form the electrically conductive inserted sheet of multi-disc on the surge protection module, surge protection module forms the electricity with the wiring board through the cooperation of electrically conductive inserted sheet and electrically conductive clamping piece and is connected.

The surge protection module is arranged on the molded case circuit breaker body, even if the power distribution cabinet is struck by lightning, the surge protection module on the molded case circuit breaker can absorb the surge current generated by the lightning stroke, the surge current is prevented from flowing through each phase, the electric appliance on the family side of a user can be effectively protected from being damaged, and the surge protection module is electrically connected to each phase loop of the molded case circuit breaker through the matching of the conductive inserting pieces and the conductive inserting pieces, so that the molded case circuit breaker is prevented from being burnt by the surge current generated by the lightning stroke, and the inserting, the clamping and the electric connection structure facilitate the installation and the subsequent replacement of the surge protection module.

The utility model discloses further set up to surge protection module and include a plurality of FUSEs FUSE, a plurality of lightning protection piezo-resistor SPD and gas discharge tube GDT, gas discharge tube GDT's one end earth connection is connected with FUSE FUSE and lightning protection piezo-resistor SPD between A looks return circuit and gas discharge tube GDT's the other end, be connected with FUSE FUSE and lightning protection piezo-resistor SPD between B looks return circuit and the other end of gas discharge tube GDT, be connected with FUSE FUSE and lightning protection piezo-resistor SPD between C looks return circuit and gas discharge tube GDT's the other end, be connected with lightning protection piezo-resistor SPD between N looks return circuit and the other end of gas discharge tube GDT.

When the molded case circuit breaker is struck by lightning, the resistance of the lightning protection voltage dependent resistor SPD connected between each phase loop (A, B, C, N phase) and the ground wire is rapidly reduced when the instantaneous voltage is higher than a certain value, so that the heavy current is conducted; when the current passing through the lightning protection piezoresistor SPD is overlarge and the duration is too long, the FUSE FUSE connected between each phase loop (A, B, C phase) and the ground wire is fused; the gas discharge tube GDT is conducted when the voltage at two ends of the gas discharge tube GDT is increased to exceed the insulation strength of gas in the gas discharge tube GDT, and the shared gas discharge tube GDT is used for accelerating the conduction of the gas discharge tube GDT by applying the lightning stroke voltage of each phase at two ends of the gas discharge tube GDT. When the molded case circuit breaker is struck by lightning, no matter which phase loop generates surge current, most of the surge current generated by the lightning stroke is absorbed through the lightning protection piezoresistor SPD, and then the rest surge current is released to the ground through the gas discharge tube GDT, so that the surge protection module finishes the gradual release of the lightning stroke energy.

The utility model discloses further set up to take surge protection's moulded case circuit breaker still includes operating device, surge protection module sets up in operating device's top, and surge protection module includes surge protection module shell and sets up the circuit board in surge protection module shell, the bottom of electrically conductive inserted sheet is fixed on the circuit board, and the top of electrically conductive inserted sheet extends to the outside of surge protection module shell.

The utility model discloses a side formation fluting that sets up to the upper cover, the fluting is just to surge protection module, be provided with the shrouding in the fluting.

The above-mentioned length and the thickness condition that do not increase moulded case circuit breaker set up the surge protection module, and the surge protection module only extends the outside with conductive insertion piece and is used for the electricity to be connected, ensures that surge protection module internal circuit board and other structures of moulded case circuit breaker keep apart, and the security and the stability that the product used are further strengthened to the shrouding.

The utility model discloses further set up to form the round hole on the electrically conductive inserted sheet, electrically conductive clamping piece includes first clamping piece and second clamping piece, and the medial surface of first clamping piece and the medial surface of second clamping piece form the bump of mutual symmetry, the electrically conductive inserted sheet passes through the cooperation of round hole and two bumps and is connected with electrically conductive clamping piece.

The utility model discloses further set up to one side that first clamping piece is close to electrically conductive inserted sheet and one side that the second clamping piece is close to electrically conductive inserted sheet all turn over a formation guide portion to the evagination.

This practicality further sets up to the number of pieces of electrically conductive inserted sheet and the number of pieces of electrically conductive clamping piece and is 5.

When the surge protection module is connected with the wiring board of the molded case circuit breaker, the conductive insertion piece is connected between the first clamping piece and the second clamping piece under the guiding action of the guiding part, and stable electric connection is realized under the matching of the salient point and the round hole.

Drawings

Fig. 1 is an exploded view of a molded case circuit breaker according to an embodiment of the present invention.

Fig. 2 is a perspective view of the embodiment of the present invention with the upper cover and the surge protection module removed.

Fig. 3 is an explosion diagram of a surge protection module according to an embodiment of the present invention.

Fig. 4 is a perspective view of a surge protection module and a conductive clip according to an embodiment of the present invention.

Fig. 5 is a perspective view of the conductive insert and the conductive clip according to the embodiment of the present invention.

Fig. 6 is a schematic circuit diagram of a surge protection module according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1-4, the present invention relates to a molded case circuit breaker with surge protection, which comprises a base 1, a middle base 2, an upper cover 3 and an operating mechanism 5, wherein the base 1 is provided with an a-phase loop 11, a B-phase loop 12, a C-phase loop 13 and an N-phase loop 14, the middle base 2 is provided with a wiring board 21 and a surge protection module 4 connected with the wiring board 21, the surge protection module 4 is arranged above the operating mechanism 5, a slot 31 is formed on a side surface of the upper cover 3, the slot 31 is right opposite to the surge protection module 4, a sealing plate 32 is arranged in the

slot

31, 5 conductive clamping pieces 22 are formed on the wiring board 21, the conductive clamping pieces 22 are respectively electrically connected with the a-phase loop 11, the B-phase loop 12, the C-phase loop 13 and the N-phase loop 14, the surge protection module 4 comprises a surge protection module housing 42 and a circuit board 43 arranged in the surge protection module housing 42, form 5 electrically conductive inserted sheets 41 on the circuit board 43, the bottom of electrically conductive inserted sheet 41 is fixed on circuit board 43, and the top of electrically conductive inserted sheet 41 extends to the outside of surge protection module shell 42, and surge protection module 4 forms the electricity through the cooperation of electrically conductive inserted sheet 41 and electrically conductive clamping piece 22 and is connected with the wiring board.

As shown in fig. 4 and 5, a circular hole 411 is formed on the conductive insertion sheet 41, the conductive insertion sheet 22 includes a first insertion sheet 221 and a second insertion sheet 222, the inner side surface of the first insertion sheet 221 and the inner side surface of the second insertion sheet 222 form protruding points 223 symmetrical to each other, the conductive insertion sheet 41 is connected with the conductive insertion sheet 22 through the matching of the circular hole 411 and the two protruding points 223, and one side of the first insertion sheet 221, which is close to the conductive insertion sheet 41, and one side of the second insertion sheet 222, which is close to the conductive insertion sheet 41, are all turned outwards to form a guiding portion 224.

As shown in fig. 6, the surge protection module includes a plurality of FUSEs, a plurality of lightning protection piezoresistors SPD and a gas discharge tube GDT, one end of the gas discharge tube GDT is connected to a ground wire, a first FUSE and a first lightning protection piezoresistor SPD are connected between the a-phase loop and the other end of the gas discharge tube GDT, a second FUSE and a second lightning protection piezoresistor SPD are connected between the B-phase loop and the other end of the gas discharge tube GDT, a third FUSE and a third lightning protection piezoresistor SPD are connected between the C-phase loop and the other end of the gas discharge tube GDT, and a fourth lightning protection piezoresistor SPD is connected between the N-phase loop and the other end of the gas discharge tube GDT.

Claims

1. The utility model provides a take surge protection's moulded case circuit breaker, is including base, well seat, the upper cover that sets gradually, be provided with A looks return circuit, B looks return circuit, C looks return circuit, N looks return circuit on the base, its characterized in that: the surge protection module is characterized in that a wiring board and a surge protection module connected with the wiring board are arranged on the middle seat, a plurality of conductive clamping pieces are formed on the wiring board and are respectively electrically connected with the phase A loop, the phase B loop, the phase C loop and the phase N loop, a plurality of conductive insertion pieces are formed on the surge protection module, and the surge protection module is electrically connected with the wiring board through the matching of the conductive insertion pieces and the conductive clamping pieces.

2. The molded case circuit breaker with surge protection of claim 1, wherein: the surge protection module comprises a plurality of FUSEs, a plurality of lightning protection piezoresistors and a gas discharge tube GDT, one end of the gas discharge tube GDT is connected with a ground wire, the FUSEs and the lightning protection piezoresistors are connected between the A-phase loop and the other end of the gas discharge tube GDT, the FUSEs and the lightning protection piezoresistors are connected between the B-phase loop and the other end of the gas discharge tube GDT, the FUSEs and the lightning protection piezoresistors are connected between the C-phase loop and the other end of the gas discharge tube GDT, and the lightning protection piezoresistors are connected between the N-phase loop and the other end of the gas discharge tube GDT.

3. A molded case circuit breaker with surge protection according to claim 1 or 2, characterized in that: the molded case circuit breaker with surge protection further comprises an operating mechanism, the surge protection module is arranged above the operating mechanism and comprises a surge protection module shell and a circuit board arranged in the surge protection module shell, the bottom of the conductive insertion piece is fixed on the circuit board, and the top of the conductive insertion piece extends to the outside of the surge protection module shell.

4. The molded case circuit breaker with surge protection of claim 3, wherein: a notch is formed in the side face of the upper cover and faces the surge protection module, and a sealing plate is arranged in the notch.

5. The molded case circuit breaker with surge protection of claim 3, wherein: form the round hole on the electrically conductive inserted sheet, electrically conductive clamping piece includes first clamping piece and second clamping piece, and the medial surface of first clamping piece and the medial surface of second clamping piece form the bump of mutual symmetry, electrically conductive inserted sheet passes through the cooperation of round hole and two bumps and is connected with electrically conductive clamping piece.

6. The molded case circuit breaker with surge protection of claim 5, wherein: one side that first clamping piece is close to electrically conductive inserted sheet and one side that the second clamping piece is close to electrically conductive inserted sheet all turn over outward and roll over and form guide portion.

7. A molded case circuit breaker with surge protection according to claim 1, 4 or 5, characterized in that: the number of the conductive insertion pieces and the number of the conductive clamping pieces are 5.