CN2133973Y

CN2133973Y - Magnetic test type thyristor protector for circuit break and phase interruption of motor

Info

Publication number: CN2133973Y
Application number: CN 92216750
Authority: CN
Inventors: 孙建军
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-08-14
Filing date: 1992-08-14
Publication date: 1993-05-19
Anticipated expiration: 2002-08-14

Abstract

The utility model relates to a magnetic test type thyristor protector for circuit break and phase interruption of a motor, which comprises a housing, a relay socket which is arranged on the housing, a faucet of electric source conducting wires of a relay and a power supply, a faucet of control conducting wires, and a magnetic testing hole of a monitored power cord. The circuit of the magnetic test type thyristor protector for circuit break and phase interruption of motor is composed of a trigger circuit, a control circuit and a detecting circuit. The detecting circuit is isolated from a monitored circuit, which makes the utility model safe, when the monitored circuit has no faults, the utility model has the advantages of non-consumption of electricity, non-noise, application of high and low pressure circuit, convenient use, long service life, low cost and convenient line connection.

Description

Magnetic test type thyristor protector for circuit break and phase interruption of motor

The magnetic test type controllable silicon motor open phase protector that opens circuit is a kind of three phase electric machine open phase protector that opens circuit, and is applicable to the three-phase alternating current load, is specially adapted to the three phase electric machine open-phase protection that opens circuit.

The present employed three phase alternating current motor open phase protector major part that opens circuit is that electronic component is many, cost height, consume electric power, China's utility application number is that 90210292.3 " three phase electric machine condenser type open phase protectors " are though circuit is comparatively simple, element is less, but checking measuring point lower end circuit breaker poor reliability, even losing protective effect; Another part utility application number is 90219677.4 and is called " controllable silicon DC control phase failure protector " directly to control A.C. contactor sucking coil electric current; has the fast advantage of action; but this device itself is wanted consume electric power; and must under the situation of self-operating, implement Monitoring and Controlling; controllable silicon is in case under surge voltage or cause thermal damage situation; lose protective effect, controlled circuit is simultaneously out of control, and security reliability is poor.

Above-mentioned various protective device is all started with detection electric current, voltage, makes testing circuit and directly is connected by telemetry circuit, in case certain element breaks down, primary current promptly enters protective device, makes it lose protective effect, and protector damages easily, poor reliability.

The purpose of this utility model provides a kind of magnetic test type controllable silicon motor open phase protector that opens circuit, and monitored circuit and testing circuit are separated, and safe and reliable, this protector is failure to actuate during the motor fault-free, not power consumption, noiselessness, and can carry out autoprotection.

The magnetic test type controllable silicon motor open phase protector that opens circuit comprises casing, on casing, be provided with relay socket, be inserted with relay on this socket, a side is provided with power lead socket and pilot socket on the casing, terminal block is housed in the casing, its circuit comprises by controllable silicon diode D2, the circuits for triggering that current-limiting resistance R and anti-false triggering capacitor C constitute; By thyristor 3CT, the control circuit that diode D1 relay ZJ constitutes; By loop coil Q, thyristor 3CT, the testing circuit that current-limiting resistance R constitutes; And three power lines of magnetic detection ring E and monitored circuit are formed the magnet ring formation.

When monitored circuit broke down, this resultant magnetic field was zero when occurring a resultant magnetic field E(fault-free immediately on the coil Q of magnetic detection ring, E during fault ≠ 0); so produce a signal code in the testing circuit induction, trigger controllable silicon 3CT, the 3CT conducting; relay ZJ action; cut off (4) (5) point, A.C. contactor sucking coil decompression is discharged, main contacts disconnects; cut off monitored circuital current; coil L goes up signal code and disappears, and the work of protector stop recovers " treating state ".

The utility model its advantage compared with the prior art is: testing circuit and monitored circuit separate, safe and reliable, during monitored circuit fault-free, be in " treating state ", not power consumption itself, noiselessness, cost are low, applied widely, the high and low pressure circuit all can use, and wiring is simple, easy to use, the life-span is long.

Description of drawings:

Fig. 1 is the magnetic test type motor open phase protector outline drawing that opens circuit;

Fig. 2 is the magnetic test type motor open phase protector winding diagram that opens circuit;

Fig. 3 is the magnetic test type motor phase-lacking protector circuit figure that opens circuit.

Number among the figure: 1, casing; 2, relay socket; 3, relay; 4, pilot socket; 5, power lead socket; 6, monitored power line magnetic detects the hole.

Below in conjunction with description of drawings the utility model embodiment:

The utility model comprises casing 1, on casing 1, be provided with relay socket 2, be inserted with relay 3 on this socket 2, a side is provided with monitored power line magnetic and detects hole 6 on casing, and the casing side is provided with power lead socket 5 and control line socket 4, wiring board is housed in the casing, the circuit of this protector is by circuits for triggering, control circuit, and testing circuit constitutes, wherein controllable silicon diode D1 one end of circuits for triggering is connected in series current-limiting resistance R, and the other end is also taken over control the false triggering capacitor C; The trigger electrode of thyristor 3CT in the control circuit is connected in series with diode D1, and thyristor 3CT anode is connected in series with relay ZJ, and negative electrode inserts zero-power line V0, and the other end of relay ZJ inserts power firestreak VB; Loop coil Q one termination of testing circuit is gone into the thyristor negative electrode, and the current-limiting resistance R of the other end and circuits for triggering connects and composes and detects the loop, and three power lines of magnetic inspection ring E and monitored circuit pass the part composition of magnet ring E.

Claims

1, the utility model belongs to a kind of magnetic test type controllable silicon motor open phase protector that opens circuit; it comprises casing 1; be provided with power lead socket 5 and pilot socket 4 in the side of casing 1; it is characterized in that on casing 1, being provided with relay socket 2; this socket 2 is inserted with relay 3; a side is provided with monitored power line and detects hole 6 on casing; wiring board is housed in the casing; the circuit of this protector is by circuits for triggering; control circuit and testing circuit, and three power lines of magnetic inspection ring E and monitored circuit pass magnet ring E and partly form.

2, according to the described protector of claim 1, it is characterized in that the controllable silicon diode D1 one end serial connection current-limiting resistance R of circuits for triggering, the other end is also taken over control the false triggering capacitor C.

3, according to the described protector of claim 1; it is characterized in that the thyristor D2(3CT in the control circuit) trigger electrode be connected in series with diode D1; thyristor 3CT anode is connected in series with relay ZJ, and negative electrode inserts zero-power line V0, and the other end of relay ZJ inserts power firestreak VB.

4, according to the described protector of claim 1, it is characterized in that loop coil Q one termination of testing circuit is gone into thyristor 3CT negative electrode, the current-limiting resistance R of the other end and circuits for triggering connects and composes and detects the loop.