CN203180791U

CN203180791U - Power supply device used for electric leakage circuit breaker

Info

Publication number: CN203180791U
Application number: CN 201320069536
Authority: CN
Inventors: 赵冰冰; 高晶; 高少杰; 王超; 王建辉
Original assignee: SHAANXI FUJI ELECTRIC POWER TECHNOLOGY Co Ltd
Current assignee: SHAANXI FUJI ELECTRIC POWER TECHNOLOGY Co Ltd
Priority date: 2013-02-06
Filing date: 2013-02-06
Publication date: 2013-09-04
Anticipated expiration: 2023-02-06

Abstract

The utility model provides a power supply device used for an electric leakage circuit breaker, comprising a cuboid hollow box; wherein a front end face of the box is open, an inner part of the hollow box is provided with an interlayer for dividing the inner part of the box into two spaces, a 380V transformer and a 220V transformer are respectively placed in the two spaces; a rear end face of the hollow box is closed, an upper side of the rear end face is provided with first and second branching long holes side by side, the upper side of the rear end face is also provided with a branching square hole. According to the power supply device of the utility model, by adopting the double transformers to provide an operating voltage to a circuit breaker electric leakage tripper, when an open phase fault occurs on a major loop, the operating voltage of the circuit breaker electric leakage tripper can be reliably provided, thereby ensuring an electric leakage protection function of the electric leakage circuit breaker; in addition, a back side of the box is provided with branching holes at different positions, thereby avoiding confusion of primary and secondary lead wires of the double transformers, and facilitating connection with a circuit.

Description

A kind of supply unit for residual current circuit breaker

Technical field

The utility model relates to a kind of circuit breaker, particularly relates to a kind of supply unit for residual current circuit breaker

Background technology

Circuit breaker with creepage protection function extensively is applied in building building and the electric power system.Residual current circuit breaker not only can be used for distributing electric energy and protection circuit, can also prevent the fire incident that the person gets an electric shock and avoids power-supply device to cause because of insulation damages simultaneously.When residual current circuit breaker has been installed, in case when having leakage current in the circuit and reaching certain value, the zero sequence current mutual inductor of residual current circuit breaker inside will induce the tripping system that current signal sends leakage tripping device to and drives circuit breaker simultaneously.But the need of work of tripping system possesses reliable supply voltage, and common residual current circuit breaker all is to adopt from the line voltage of major loop or phase voltage as supply voltage.When major loop generation phase failure accident, the tripping system of residual current circuit breaker will lose the voltage supply, thereby can't work, and like this, residual current circuit breaker can lose earth leakage protective function, thereby brings Danger Electric shock risk to the person.

Summary of the invention

In order to solve the problems of the technologies described above, the utility model provides a kind of supply unit for residual current circuit breaker, it comprises the hollow box body of rectangular shape, wherein the front end face of casing is uncovered, be provided with interlayer in hollow box body inside, it is divided into two spaces with box house, is placed with 380V transformer and 220V transformer in two spaces respectively, separates to avoid two magnetic circuits between the transformer to connect by interlayer between such two transformers.The rear end face of hollow box body is sealing, upside at rear end face is provided with the first and second separated time slotted holes side by side, wherein the first separated time slotted hole is used for passing coil lead at the beginning of coil lead and 220V transformer at the beginning of two of 380V transformer one, the second separated time slotted hole is used for passing 380V transformer 3 and all secondary coil lead-in wires of 220V transformer, downside at rear end face is provided with the separated time square hole, and it passes for the neutral polar curve that the 220V transformer is connect major loop.

The utility model provides operating voltage by adopting dual transformer for the circuit breaker leakage tripping device, so when the major loop open phase fault, can provide the operating voltage of circuit breaker leakage tripping device reliably, guarantees the creepage protection function of residual current circuit breaker.In addition, the place is provided with the separated time hole at the box back surface diverse location, and the primary and secondary lead-in wire of dual transformer is avoided confusion, and can make things convenient for circuit to be connected.

Description of drawings

Fig. 1 is the front schematic view of the supply unit for residual current circuit breaker of the present utility model;

Fig. 2 is the schematic rear view of the supply unit for residual current circuit breaker of the present utility model.

Embodiment

As shown in Figure 1, the utility model provides a kind of supply unit for residual current circuit breaker, it comprises the hollow box body 1 of rectangular shape, wherein the front end face of casing 1 is uncovered, be provided with interlayer 2 in hollow box body 1 inside, it is divided into two spaces with casing 1 inside, is placed with 380V transformer 3 and 220V transformer 4 in two spaces respectively, separates to avoid two magnetic circuits between the transformer to connect by interlayer 2 between such two transformers 3,4.Constitute the dual transformer of 380 volts of transformers 3 and 220 volts of transformers 4 like this, wherein the primary coil of 380 volts of transformers 3 lead-in wire is connected with two-phase in the major loop three-phase, in the major loop three-phase other one is connected with an end of the primary coil of 220 volts of transformers 4, and the other end of the primary coil of 220 volts of transformers 4 and the neutral pole of major loop join; Described 380 volts and 220 volts of transformers 3,4 secondary coil output are exported 24 volts.

Fig. 2 shows the rear end face of hollow box body 1, wherein rear end face is sealing, upside at rear end face is provided with the first separated time slotted hole 5 and the second separated time slotted hole 6 side by side, wherein the first separated time slotted hole 5 is used for passing coil lead at the beginning of coil lead and 220V transformer 4 at the beginning of two of 380V transformer 3 one, the second separated time slotted hole 6 is used for passing 380V transformer 3 and 220V transformer 4 all secondary coils go between, downside at rear end face is provided with separated time square hole 7, and it passes for the neutral polar curve that 220V transformer 4 primary coils is connect major loop.

Claims

1. supply unit that is used for residual current circuit breaker, it comprises the hollow box body of rectangular shape, wherein the front end face of casing is uncovered, be provided with interlayer in hollow box body inside, it is divided into two spaces with box house, in two spaces, be placed with 380V transformer and 220V transformer respectively, the rear end face of hollow box body is sealing, upside at rear end face is provided with the first and second separated time slotted holes side by side, wherein the first separated time slotted hole is used for passing coil lead at the beginning of coil lead and 220V transformer at the beginning of two of 380V transformer one, the second separated time slotted hole is used for passing 380V transformer (3) and all secondary coil lead-in wires of 220V transformer, downside at rear end face is provided with the separated time square hole, and it passes for the neutral polar curve that the 220V transformer is connect major loop.