CN201797303U

CN201797303U - Motor protection circuit

Info

Publication number: CN201797303U
Application number: CN2010202751445U
Authority: CN
Inventors: 孙艳波; 党宁军; 于健; 孙丽波
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-24
Filing date: 2010-07-24
Publication date: 2011-04-13
Anticipated expiration: 2020-07-24

Abstract

The utility model relates to a motor protection circuit which comprises air circuit breakers QF, fuses FU and vacuum alternating current contactors K which are sequentially connected with a three-phase power input terminal A, a three-phase power input terminal B and a three-phase power input terminal C, and a three-phase power output terminal U, a three-phase power output terminal V and a three-phase power output terminal W which are connected with a motor M. The motor protection circuit is characterized in that a motor protector FS is connected among the three-phase power output terminal U, the three-phase power output terminal V and the three-phase power output terminal W which are used for connecting the vacuum alternating current contactors K and the motor M. The utility model can realize automatic startup, automatic protection, remote control startup, alarm and incident recording, is safe and reliable and can be widely used in power distribution engineering of oilfield pumping units.

Description

Motor protecting circuit

One, technical field

The utility model relates to petroleum beam-pumping unit electric equipment control device, particularly a kind of motor protecting circuit.

Two, background technology

During oil development is produced, the control device of traditional oil pumper driving force motor, be generally the well head electric control box, mainly constitute by circuit breaker, start button, A.C. contactor, protector etc., for contribution has been made in oil field oil pumping exploitation, 1., some faults such as motor short circuit, underload, phase shortage, three-phase imbalance, overvoltage, under-voltage, phase sequence, motor phase shortage, stall or overload shut down etc. but it exists following shortcoming or deficiency simultaneously:, administrative staff are difficult in time find and handle, easily cause mechanical breakdown; 2. function is few, lacks functions such as protection, measurement, control, bus communication; 3. operational data, data are fully by manually doing, and complete, data, data accurately can not be provided; 4. operation log, activated, failure logging can not be provided, restart important informations such as record, switching value displacement record, historical record; 5. can not bring convenience motor protection, remote control and sophisticated equipment management and accident analysis;

Three, utility model content

Order of the present utility model provides a kind of motor protecting circuit, adopts air circuit, motor protector, vacuum A.C. contactor combining structure, the shortcoming or the deficiency that overcome effectively or avoid existing in the above-mentioned prior art.

Motor protecting circuit described in the utility model; comprise air circuit QF, protector FU, vacuum A.C. contactor K that three-phase electricity lead-in clamp ABC connects in turn and the three-phase electricity output wiring terminal UVW that is connected with motor M, it is characterized in that being connected with a motor protector FS between the three-phase electricity output wiring terminal UVW that described vacuum A.C. contactor K is connected with motor M.

Wherein, described motor protector FS comprises that sample circuit amplifies analyzing and processing with overvoltage, under-voltage input, signal in turn, actuator is connected; logout is reported to the police and is connected with signal amplification analyzing and processing; input such as phase shortage, stall, overload, short circuit are amplified analyzing and processing with sample circuit and signal and are connected; automatically startup/remote control startup is connected with sample circuit, and short-circuit protection, overcurrent protection, rotation-clogging protection, underloading protection, unbalance protection, open phase protection, overvoltage protection, under-voltage protection, earth leakage protective and actuator walk abreast and be connected.The binding post 3,4 of described motor protector FS is normally closed some binding post of automatic control, disconnects during fault.The binding post 4,5 of described motor protector FS is often opened binding post for automatic control point, closure during fault.The binding post 1,2 of described motor protector FS is outer power supply source binding post.

The utility model has following advantage compared with prior art:

1, function is many, and collection protection, measurement, control, bus communication are one, have replaced various protections and auxiliary relay, various electrical measurement table and the signal lamp of former useful apportion arrangements of components;

2, operational data, data are complete, accurate, operation log, activated, failure logging are provided, restart important informations such as record, switching value displacement record, for modern equipment control and accident analysis bring great convenience;

3, easy to operate, safety, motor protector can be exported and close a floodgate and trip signal, have remote controller, available it control circuit breaker and close tripping operation, guarantee the motor safe operation.

4, fully use modern electronic technology and computer technology, solved above-mentioned production run problem effectively.

5, incoming call final vacuum A.C. contactor automatic starting motor control protection electric circuit, and incidents such as overload, short circuit, stall, underload, phase shortage, three-phase imbalance, overvoltage, under-voltage, phase sequence are had the reliable protection effect.

Four, description of drawings

Fig. 1 is a kind of embodiment of the present utility model primary circuit structural representation

Fig. 2 is for pressing secondary circuit structural representation shown in Figure 1

Fig. 3 is for pressing motor protector FS theory structure schematic diagram shown in Figure 1

Five, embodiment

Consult Fig. 1-Fig. 3; a kind of motor protecting circuit; comprise air circuit QF, protector FU, vacuum A.C. contactor K that three-phase electricity lead-in clamp ABC connects in turn and the three-phase electricity output wiring terminal UVW that is connected with motor M, it is characterized in that being connected with a motor protector FS between the three-phase electricity output wiring terminal UVW that described vacuum A.C. contactor K is connected with motor M.

Motor protector FS comprise sample circuit 11 in turn with overvoltage; under-voltage input 13; signal amplifies analyzing and processing 15; actuator 17 is connected; logout warning 16 is amplified analyzing and processing 15 with signal and is connected; phase shortage; stall; overload; input such as short circuit 14 are amplified analyzing and processing 15 with sample circuit 11 and signal and are connected; automatically startups/remote control startup 12 is connected short-circuit protection 18 with sample circuit 11; overcurrent protection 19; rotation-clogging protection 20; underloading protection 21; unbalance protection 22; open phase protection 23; overvoltage protection 24; under-voltage protection 25; earth leakage protective 26 and 17 parallel being connected of actuator.The binding post 3,4 of motor protector FS is normally closed some binding post of automatic control, disconnects during fault.The binding post 4,5 of motor protector FS is often opened binding post for automatic control point, closure during fault.The binding post 1,2 of motor protector FS is for being outer power supply source binding post.

During operation; behind incoming call, circuit breaker Q F closure is pressed start button S2; A.C. contactor K coil K1 has; normal battle of the K2 of A.C. contactor K has electricity, A.C. contactor K closure, and motor protector FS has; start working; motor M starts, and disconnects when pressing stop button S1 loop, and motor M quits work.The binding post 3,4 of motor protector FS is normally closed some binding post of automatic control, disconnects during fault, and the binding post 4,5 of motor protector FS is often opened binding post for automatic control point, closure during fault, and the binding post 1,2 of motor protector FS is outer power supply source binding post; When motor M breaks down, motor protector FS will show fault and self-lock protection, click stop button S1 during as if the contactor self-locking and get final product.

Claims

1. motor protecting circuit; comprise air circuit QF, protector FU, vacuum A.C. contactor K that three-phase electricity lead-in clamp ABC connects in turn and the three-phase electricity output wiring terminal UVW that is connected with motor M, it is characterized in that being connected with a motor protector FS between the three-phase electricity output wiring terminal UVW that described vacuum A.C. contactor K is connected with motor M.

2. the motor protecting circuit of being narrated according to right 1; it is characterized in that described motor protector FS comprise sample circuit in turn with overvoltage; under-voltage input; signal amplifies analyzing and processing; actuator is connected; logout is reported to the police and is connected with signal amplification analyzing and processing; phase shortage; stall; overload; the short-circuit signal detection is amplified analyzing and processing with sample circuit and signal and is connected; automatically startup/remote control startup is connected short-circuit protection with sample circuit; overcurrent protection; rotation-clogging protection; the underloading protection; unbalance protection; open phase protection; overvoltage protection; under-voltage protection; earth leakage protective is connected with actuator is parallel.

3. the motor protecting circuit of being narrated according to right 1 is characterized in that the binding post 3,4 of described motor protector FS is normally closed some binding post of automatic control, disconnects during fault.

4. the motor protecting circuit of being narrated according to right 1 is characterized in that the binding post 4,5 of described motor protector FS is often opened binding post for automatic control point, closure during fault.

5. according to right 1 or 3 motor protecting circuits of being narrated, it is characterized in that the binding post 1,2 of described motor protector FS is outer power supply source binding post.