CN204760336U

CN204760336U - Circuit breaker alternating current -direct current operation circuit

Info

Publication number: CN204760336U
Application number: CN201520444618.7U
Authority: CN
Inventors: 陈刚; 李跃; 扶向阳; 董丹
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2015-06-25
Filing date: 2015-06-25
Publication date: 2015-11-11
Anticipated expiration: 2025-06-25

Abstract

The utility model discloses a circuit breaker alternating current -direct current operation circuit. It is on the separating brake return circuit, adds divider resistance, by full -bridge rectifier module, prevents jumping the interchange processing module that relay and filter capacitance constitute, and then constitutes i -shaped bridge circuit for when not having the separating brake operation in the combined floodgate position, can not start and prevent jumping the relay, the opto -coupler is realized the broken string in separating brake return circuit and is kept watch on, when having the separating brake operation, prevent jumping the relay and reliably start and keep, when minute, after closing operation all cancels, prevent jumping the relay and effectively return, solved by the broken string keep watch on probably bring prevent jumping the problem that can not return, simultaneously, the opto -coupler cooperation through separating brake and combined floodgate return circuit realizes the position and keeps watch on function and broken string (mistakes) supervision function, ensures the normally operation of safety of circuit breaker.

Description

Circuit breaker alternating current-direct current operation circuit

Technical field

The utility model relates to a kind of operation circuit of circuit breaker, can compatible operations power supply be especially the different application occasion of AC and DC.

Background technology

Primary cut-out operation circuit needs to consider that operation is anti-jump, and then need to consider that broken string and position monitor, in existing operation sub-gate circuit, be parallel with anti-trip relay and broken string supervision element, broken string supervision element is connected with certain electric current guarantee, and it normally works, so may there is broken string to monitor the hidden danger causing anti-trip relay effectively not return, and some current solution ways are more complicated, even affect rapidity and the reliability of operation.

Summary of the invention

The broken string that may exist to overcome existing primary cut-out operation circuit monitors the deficiency causing anti-trip relay effectively not return, and the utility model provides a kind of circuit breaker alternating current-direct current operation circuit, effectively can meet the functional requirement of two aspects.

The utility model solves the technical scheme that its technical problem adopts:

A kind of circuit breaker alternating current-direct current operation circuit, comprise sub-gate circuit, add divider resistance, exchange processing module and separating brake exports and circuit breaker normally opened contact forms drum bridge circuit, divider resistance R1 and divider resistance R2, separating brake export TJ, circuit breaker normally opened contact is connected on a brachium pontis respectively, exchange processing module Z and are connected between drum bridge.

Described interchange processing module Z is connected in series by full-bridge rectification module D, optocoupler L1, anti-trip relay FTJ, and the filter capacitor C being connected in parallel on FTJ two ends is formed.

Divider resistance R1 and divider resistance R2 Standard resistance range are 82k Ω-100k Ω, 22k Ω-25k Ω.

In DC operation state, rectifier module D and filter capacitor C are short circuit.

The utility model can make anti-bouncing function and broken string function for monitoring all normally work by bridge circuit in sub-gate circuit, and coordinate with the optocoupler of closing circuit and realize position and monitor, facilitate in DC power supply and AC power simultaneously, and adopt element few, dependable performance.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the utility model is further illustrated.

Fig. 1 is circuit theory diagrams of the present utility model.

In Fig. 1, KM is bus, and HJ exports (can and connect) for closing a floodgate, HQ is closing coil, TJ is that separating brake exports (can and connect), and TQ is switching winding, and R1, R2, R3 are divider resistance, L1, L2 are alternating-current bidirectional optocoupler, FTJ is 110V direct current anti-trip relay, and FTJ1 is the contact of anti-trip relay, and D is full-bridge rectification module, C is filter capacitor, and Z is the interchange processing module be made up of FTJ, C, L1, D.

Embodiment

With reference to shown in Fig. 1, in order to ensure to form drum bridge circuit by interchange processing module Z, divider resistance R1, R2, separating brake output TJ, breaker open operation normally opened contact, the normal work of optocoupler L2 and operation circuit, R1, R2, R3 need consider withstand voltage, power, recommend resistance range be 82k Ω ?100k Ω, 22k Ω ?25k Ω, 200k Ω ?270k Ω, FTJ internal resistance 20k Ω ?30k Ω.When being in closing position and without sub-switching operation, Yi Zheng ?A ?B ?bear loop complete broken string monitor; When there being sub-switching operation, Yi Zheng ?B ?A ?bear loop start anti-trip relay, make closing operation be transferred to sub-gate circuit, realize reliably anti-jump; After combined floodgate and separating brake order are all cancelled, anti-trip relay effectively returns.Broken string and position supervision is realized by two optocouplers.

Working method is as follows:

One, when circuit breaker is operated in alternating current operation occasion:

1, when circuit breaker is in closing position and without sub-switching operation, dividing point A point current potential is about 0.25U, through rectification, optocoupler L1, anti-trip relay FTJ coil, by switching winding to operation bus negative terminal, forms about 1mA small area analysis.This electric current can make broken string monitor optocoupler L1 conducting, but can not start anti-trip relay, reaches broken string (dead electricity)/position and monitors object;

2, when circuit breaker is in any position and has sub-switching operation, sub-gate circuit B point current potential is U, and dividing point A is 0.5U, and this pressure reduction will start anti-trip relay FTJ, make closing operation proceed to sub-gate circuit, and stoping closes a floodgate jumps.Now optocoupler L1 electric current can reach 5mA, but still at the reduced levels that it adapts to, can not damage.Rectification, filtering make anti-trip relay reliably to start and effectively to keep, and can not return, shake;

3, when sub-switching operation completes, when B point voltage disappears, anti-trip relay coil, because of no current loop, is effectively returned.Avoid and design because broken string monitors the residual voltage that element is formed, the problem can not discharge, returned in the past.Even if circuit breaker tripping after separating brake, between A, B, voltage is also in 0.25U level, and loop element still can not damage;

4, when circuit breaker is in open position, point position monitors that optocoupler L2 can reach closing circuit broken string and monitor object, and forms circuit breaker position status signal with co-bit optocoupler L1 is unified;

Even if 5 circuit breaker trippings, contact also can breaking operation electric current, therefore without the need to considering that electric current keeps.

Two, when clearly for DC operation occasion, rectification, filtering can short circuits (cancellation), and circuit is more simple and reliable.

Three, sub-gate circuit nonfunctional element, even if other component wear lost efficacy, still ensured quick, action message.

Claims

1. a circuit breaker alternating current-direct current operation circuit, comprise sub-gate circuit, it is characterized in that, add divider resistance, exchange processing module and separating brake exports and circuit breaker normally opened contact forms drum bridge circuit, divider resistance R1 and divider resistance R2, separating brake export TJ, circuit breaker normally opened contact is connected on a brachium pontis respectively, exchange processing module Z and are connected between drum bridge.

2. circuit breaker alternating current-direct current operation circuit according to claim 1, is characterized in that, described interchange processing module Z is connected in series by full-bridge rectification module D, optocoupler L1, anti-trip relay FTJ, and the filter capacitor C being connected in parallel on FTJ two ends is formed.

3. circuit breaker alternating current-direct current operation circuit according to claim 1, is characterized in that, divider resistance R1 and divider resistance R2 Standard resistance range are 82k Ω-100k Ω, 22k Ω-25k Ω.

4. circuit breaker alternating current-direct current operation circuit according to claim 1, is characterized in that, in DC operation state, rectifier module D and filter capacitor C are short circuit.