CN2198700Y - Multifunction controller - Google Patents

Abstract

The utility model relates to a multifunctional controller. A fuse, the normally open contacts of an AC contactor, the electromagnetic coils of a wire break relay and a thermal relay are connected in series in the main circuit of the electricity of three phases A, B, and C. The three normally open contacts of the wire break relay, the normally closed contacts of the thermal relay, the normally open contacts of the AC contactor and the coils of the AC contactor are connected in series in a control circuit. The utility model has the advantage that the multifunctional controller prevents a motor from being damaged because of excess voltage, short circuit, phase lack and wire break.

Description

Multifunction controller

The utility model relates to a kind of multifunctional controller of protecting alternating current machine.

AC induction motor, particularly squirrel cage motor commonly used, often generation is under-voltage in the middle of operation, faults such as short circuit and phase shortage.These faults usually cause the damage of motor.Solution in the past is serial connection fast acting fuse and a thermal relay in the major loop of three phase mains.Though above-mentioned measure can be played certain protective role, broken string is caused the phase-deficient operation reaction is insensitive.

The purpose of this utility model is to provide a kind of multifunctional controller, and this controller can be when motor emerged in operation disconnection fault, fast shut-off power supply, protection motor.

The purpose of this utility model is to realize like this, a kind of multifunctional controller, casing, fuse are arranged, the fuse of contacting successively between every phase major loop input terminal in A, B, the electric major loop of C three-phase and the lead-out terminal, A.C. contactor normally open contact, wire-break relay solenoid and thermal relay; The normally closed button and the Chang Kai button of polyphone are successively arranged in control loop, one end of normally closed button and the A input terminal of major loop mutually electrically connect, the other end is connected to the normally open contact of three normally open contacts, thermal relay normally closed interlock and the A.C. contactor of the wire-break relay of polyphone successively, terminals of this normally open contact with electrically connect with the coil of A.C. contactor after terminals often driving button are in parallel, the other end of this coil and the C input terminal of major loop mutually electrically connect.When ground connection, short trouble appear in motor in running, fuse is with quick fuse, when line voltage is on the low side and when causing that the motor feels hot, thermal relay will move, the thermal relay normally open contact in the control loop is opened, cut off the ac contactor coil power supply, thereby the cut-out motor power, when in the main circuit power supply no matter that in the three-phase riches all the way when giving birth to disconnection fault, the normally open contact of wire-break relay all can be opened immediately, cut off the ac contactor coil power supply, thereby cut off motor power.The protection motor prevents to damage.

Therefore, the utility model has the motor of preventing because of under-voltage than prior art, short circuit, phase shortage, broken string and the kinds of protect function damaged.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 the utility model electrical schematic diagram

Fig. 2 cabinet layout plan

Referring to accompanying drawing, an embodiment of the present utility model is the multifunctional controller of 3 kilowatts of pump motors of control, this controller is installed in the casing 1, insert A, B, the C three phase mains, be fixed with fuse RC on the terminal block 2 in the casing, A.C. contactor CJQ, wire-break relay H, and thermal relay RK, install on the cabinet panel and often open button D2 and normally closed button D1, at A, B, be connected with fuse successively between input terminal E in the every phase major loop of C and the lead-out terminal F, A.C. contactor normally open contact J1 or J2 or J3, wire-break relay solenoid HC, and thermal relay RK have the normally closed button D1 and the Chang Kai button D2 of polyphone successively in control loop, one end of normally closed button and the A input terminal of power line mutually electrically connect, and the other end is connected to three normally open contact HJ1 of the wire-break relay of polyphone successively, HJ2, HJ3; Thermal relay normally closed interlock RKJ and A.C. contactor normally open contact J4, be electrically connected with the coil CJ of A.C. contactor after terminals of this normally open contact and the terminals parallel connection of often driving button, the other end of this coil and the C input terminal of power line mutually are electrically connected.The used A.C. contactor of the utility model is a CJQ-10 type contactor, and thermal relay is the JR16B-10 type; Wire-break relay is made at tongue tube outside suit solenoid, electric current reaches normally open contact HJ1 or the HJ2 or the HJ3 connection of 0.25 ampere-hour tongue tube in solenoid, electric current in solenoid is opened less than the described normally open contact of 0.25 ampere-hour, therefore, no matter which the device action in the main circuit power line; Or power line itself opens circuit and causes wherein electric current less than 0.25 ampere-hour, and wire-break relay can both be with the failure of current in the control loop, thereby the control A.C. contactor cuts off A, B, C three-phase main circuit power, prevents that motor from breaking down.For making the timely handling failure of operating personnel, in casing or by the casing, music alarm circuit can also be installed.Music integrated circuit in this circuit (KD-9300) output connects the base stage of transistor (2SC9014), the collector terminal of this triode is connected to loud speaker, the manual K switch 1 of emitter terminal warp of this triode and the normally closed interlock J5 of A.C. contactor connect the negative pole of 1.5 volts of batteries, and the input of music integrated circuit is in parallel with the transistor emitter end.

Claims (2)

1, a kind of multifunctional controller, casing, fuse are arranged, it is characterized in that A, B, the electric major loop of C three-phase are arranged, between the input terminal of every phase major loop and lead-out terminal, contact successively described fuse, A.C. contactor normally open contact, wire-break relay solenoid and thermal relay; The normally closed button and the Chang Kai button of polyphone are successively arranged in control loop, one end of normally closed button and the A input terminal of major loop mutually electrically connect, the other end is connected to the normally open contact of three normally open contacts, thermal relay normally closed interlock and the A.C. contactor of the wire-break relay of polyphone successively, terminals of this normally open contact with electrically connect with the coil of A.C. contactor after terminals often driving button are in parallel, the other end of this coil and the C input terminal of major loop mutually electrically connect.

2, multifunctional controller according to claim 1, it is characterized in that, a music alarm circuit is arranged, music integrated circuit output in this circuit connects the transistor base stage, the collector terminal of this triode is connected to loud speaker, and the emitter terminal of this triode connects dc power anode through the normally closed interlock of manual switch and described A.C. contactor.The input of music integrated circuit is in parallel with the transistor emitter end.

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