CN202564154U

CN202564154U - Anti-tripping circuit device for imported circuit breaker body

Info

Publication number: CN202564154U
Application number: CN2012202229416U
Authority: CN
Inventors: 周殿军; 田丰; 王永波
Original assignee: Yunfeng power plant
Current assignee: Yunfeng power plant
Priority date: 2012-05-18
Filing date: 2012-05-18
Publication date: 2012-11-28
Anticipated expiration: 2022-05-18

Abstract

The utility model relates to a circuit breaker auxiliary control device, in particular to an anti-tripping circuit device for an imported circuit breaker body. The anti-tripping circuit device comprises an anti-tripping relay K3 circuit, a tripping position monitoring relay circuit TWJa and a manual closing relay SHJ1 circuit. An anti-tripping circuit and a closing coil circuit of the circuit breaker body are parallel connected and in butted joint with a closing circuit in an operation box directly, N5-N6 connecting lines of the circuit breaker tripping position monitoring relay circuit are disconnected to enable a circuit breaker body auxiliary closing contact BG1 to be serially connected into the circuit, namely the circuit breaker body auxiliary closing contact is serially connected into the circuit breaker tripping position monitoring relay circuit. The circuit breaker auxiliary control device has the advantages that wiring is simple, circuit elements are not increased, the tripping position monitoring relay is unchanged, and a circuit breaker body anti-tripping circuit and the closing circuit in the operating box are in direct butted joint.

Description

Import breaker body anti-jump loop device

Technical field

The utility model relates to a kind of circuit breaker sub controlling unit, i.e. import breaker body anti-jump loop device.

Background technology

In the prior art; The most of protective device control box that adopts of the anti-jump function of circuit breaker is realized, because relevant relay tip off-capacity in the protective device control box is prone to take place contact adhesion, burning phenomenon; Thereby can not reach the anti-jump function of circuit breaker, cause the grid equipment accident.Reach " Protection Technology supervision " requirement by " relaying protection configuration and type selecting principle ", " route protection and servicing unit standardized designs standard " and " safety evaluatio "; Should the anti-jump loop of circuit breaker be changed into by breaker body mechanism and realizing, the anti-jump loop of the circuit breaker in the cancellation protective device control box.Under normal circumstances, with the anti-jump loop of breaker body and the parallel connection of closing coil loop directly with control box in closing circuit dock, soon 113 of X3 be connected in the breaker body with 112, again with control box in N6 be connected, like 1. part of dotted line among Fig. 1.Anti-jump principle: during closing by hand, SHJ1 excitation, closing coil Y3 excitation, breaker closing.But the external world just in time is in the short trouble state, and the protection action makes circuit breaker trip; But this moment,, still sending the tripping operation order if control the involution of handle end or the adhesion of SHJ1 relay contact is blocked; Attempt is closed a floodgate circuit breaker once more, but because anti-trip relay K3 remains excited state, its contact 12-11 breaks off; Closing coil Y3 is excitation no longer, guarantees that circuit breaker not closing a floodgate, has played anti creep performance.This mode generally only is applicable to homemade protection control box and breaker operator loop.Homemade for the employing of protective device control box, circuit breaker adopts (as: Beijing ABBHigh-pressure Switch Equipment Co., Ltd.'s production model is that circuit breaker, the Siemens Company's production model of LBP-220 is the vacuum circuit-breaker of 3AH1-3AH4) of import, on electric parameter, mismatches between them to have following problems; Behind the combined floodgate, the involution of closing by hand relay SHJ1 loss of excitation, body anti-trip relay K3 should the loss of excitation involution; But because trip position supervisory relay TWJa (comprising additional resistance) resistance (kilo-ohm) less, body anti-trip relay K3 resistance (ten thousand Europe) is bigger, then through the trip position monitoring circuit; Behind the combined floodgate; Make the long-term excitation of K3, no longer involution is forever broken off the breaker closing loop; Even circuit breaker trip can not guarantee that circuit breaker closes a floodgate normally later on.Therefore, the access to the circuit breaker anti-jump loop needs to improve.Improved procedure one: each component parameters of adjustment trip(ping) circuit makes it to reach coupling.Like 2. part of dotted line among Fig. 1.Increase additional resistance (Ra or Rf), guarantee after the involution of closing by hand relay SHJ1 loss of excitation the involution of anti-trip relay K3 loss of excitation.Be connected in series or also be attached calculating such as adding its resistance of resistance, capacity, selection complicacy, attach resistance in addition, the increase loop element has increased unsafe factor, attaches the resistance installation site outside also will considering simultaneously.This mode solves in the time of should making trip position supervisory relay plug-in unit by protection control box manufacturer.Improved procedure two: the breaker body anti-jump loop is directly inserted hand closing relay (or multiple switching relay) contact, like 3. part of dotted line among Fig. 1.The method is adopted by most of user, is specially adapted to the circuit breaker triphase operation box.But if the phase-splitting control box, every phase all need insert hand and close relay (or multiple switching relay) contact, needs three pairs, and most of control box spare contact is inadequate, is difficult to realize.

The utility model content

The purpose of the utility model is to provide a kind of wiring simple to above-mentioned deficiency, is easy to the on-the-spot import breaker body anti-jump loop device of realizing.

The technical solution of the utility model is: import breaker body anti-jump loop device comprises anti-trip relay K3 loop, trip position supervisory relay loop TWJa and closing by hand relay SHJ1 loop.With the anti-jump loop of breaker body and the parallel connection of closing coil loop directly with control box in closing circuit dock; Line with the N5-N6 (is that ZFZ-918 phase-splitting breaker operator case is an example with Xuji Electric Co., Ltd's production model) in supervisory relay loop, circuit breaker trip position breaks off simultaneously, seals in the auxiliary contact BG1 that closes of body circuit breaker.

Import breaker body anti-jump loop " circuit breaker auxiliary contact method " access technology scheme is to the disadvantage of the above cut-in method of import breaker body anti-jump loop, existence; The reality from the scene, breaker body anti-jump loop can adopt " circuit breaker auxiliary contact method " to insert.Promptly, seal in the breaker body aided location and close contact in supervisory relay loop, circuit breaker trip position.

The utility model has the advantages that: the method wiring is simple, does not increase loop element, does not change the effect of trip position supervisory relay, and closing circuit directly docks in the body anti-jump loop of circuit breaker and the control box.More because of the subsequent use auxiliary contact of import circuit breaker in addition, can satisfy the needs in three-phase phase-splitting breaker closing loop fully.

To combine accompanying drawing that the execution mode of the utility model is described in further detail below.

Description of drawings

Fig. 1 is a circuit breaker anti-jump loop circuit diagram in the prior art.

Fig. 2 is an import breaker body anti-jump loop cut-in method circuit diagram.

Embodiment

Referring to Fig. 1, import breaker body anti-jump loop device comprises anti-trip relay K3 loop, trip position supervisory relay loop TWJa and closing by hand relay SHJ1 loop.With the anti-jump loop of breaker body and the parallel connection of closing coil loop directly with control box in closing circuit dock, simultaneously with the line disconnection of the N5-N6 in supervisory relay loop, circuit breaker trip position, seal in the body circuit breaker and assist and close contact BG1.

Behind the breaker closing, it closes contact by being switched to disconnection, trip position is kept watch on the TWJa loop break off; Behind circuit breaker trip, it closes contact by reaching connection, trip position is kept watch on the TWJa loop insert again, to accomplish the effect that closing circuit is kept watch on.The starting of K3 anti-trip relay, return and only depend on closing by hand relay SHJ1 loop, to keep watch on the TWJa loop irrelevant with trip position, thereby guarantee that really the anti-jump function of circuit breaker is realized by body.

Claims

1. import breaker body anti-jump loop device; Comprise anti-trip relay K3 loop, trip position supervisory relay loop TWJa and closing by hand relay SHJ1 loop; It is characterized in that with the anti-jump loop of breaker body and the parallel connection of closing coil loop directly with control box in closing circuit dock; Line with the N5-N6 in supervisory relay loop, circuit breaker trip position breaks off simultaneously, seals in the auxiliary contact BG1 that closes of body circuit breaker.