CN201113386Y

CN201113386Y - Full-automatic open-phase protection time-delay closing device

Info

Publication number: CN201113386Y
Application number: CNU2007200278084U
Authority: CN
Inventors: 潘凡鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-07
Filing date: 2007-09-07
Publication date: 2008-09-10
Anticipated expiration: 2017-09-07

Abstract

The utility model relates to an automated device, which is capable of automatic open-phase protection and time-delay switchingin and is used in a low-voltage electric power distribution cabinet, a low-voltage distribution room and a low-voltage case-type substation with the master control switch used as a universal circuit breaker. The utility model adopts the following technical proposal: a relay KJ1, a relay KJ2 and a relay KJ3 are respectively connected between three live lines and zero lines; the normally open contacts of the three relays are connected in series at first and then are connected in series with the normally closed contact of a cut-off relay KJ Duan; the normally closed contacts of the three relays are connected in parallel at first and then are connected in series with the normally open contact of the cut-off relay KJ Duan; and an energy-storing relay KJ Chu, a switchingin relay KJ He and a tripping relay KJ Tiao are connected in parallel with a time relay KT1, a time relay KT2 and a time relay KT3 and then are connected in series between the normally open contact and the normally closed contact of the cut-off relay KJ Duan. The automated device has the characteristics of simple structure, convenient maintenance, reliable operation and convenient installation.

Description

Full-automatic open-phase protection time-delay combined floodgate device

Technical field

The utility model relates to a kind of automatic open-phase protection of low-voltage distribution cabinet, low-voltage distribution chamber and low pressure box-type substation that master switch is an omnipotent breaker and automation equipment that time-delay is closed a floodgate of being used for; especially can be the switchgear house of overhead transmission line to the transformer top; have omnipotent breaker the close a floodgate protection of forward and backward phase shortage, time-delay closing protective and the automatic control device that closes automatically, trips.

Background technology

The box change of low-voltage distribution chamber of using and low pressure is at present closed a floodgate and mainly is made up of A.C. contactor, fuse, omnipotent breaker and energy storage relay, closing relay, tripping relay, its master switch mostly is omnipotent breaker, so these low-voltage distribution chambers and box change have following defective:

1, needs behind the incoming call to close a floodgate manually to send electricity, mistake, and give to bring and send electricity untimely, and cause damage with electric unit.

2, do not have the open-phase protection function, can not effectively protect the power consumption equipment on the circuit of below.

3, the closing protective function of not delaying time can not solve because the secondary reclosing of overhead transmission line, the power supply instability that causes and causing the accident.

According to this situation, we are not doing original equipment under the situation of big change through the research to low-voltage distribution chamber and box change, design and install out full-automatic open-phase protection and time-delay combined floodgate device.

Summary of the invention

The novel purpose of this use is exactly in order to solve the defective of former switchgear house and box change transformer station, does not promptly possess automatic closing, open-phase protection, time-delay and closes a floodgate.This reality is novel to be provided a kind of and can make it can possess automatic time delay simultaneously to close a floodgate, the forward and backward full-automatic open-phase protection that open-phase protection all arranged that the closes a floodgate combined floodgate device of delaying time.

The technical solution of the utility model is: be connected with relay K J1, KJ2, KJ3 respectively between three live wires and zero line, connect with the normally-closed contact that cut-out relay KJ breaks in the normally opened contact series connection back of three relay K J1, KJ2, KJ3, connect with the disconnected normally opened contact of cut-out relay KJ after the normally-closed contact parallel connection of three relay K J1, KJ2, KJ3, energy storage relay K J storage, closing relay KJ close, tripping relay KJ jumps is connected on cut-out relay KJ breaks often open and close between the normally-closed contact after in parallel with three time relay KT1, KT2, KT3.

Incoming end at power supply connects A.C. contactor and fuse, connects power supply indicator respectively on three relay K J1, KJ2, KJ3.

The beneficial effects of the utility model are: when 1, having avoided incoming call or behind the incoming call, because the infringement of phase shortage to causing with electric unit.2, reduced the secondary reclosing that occurs owing to high-tension overhead line, caused incoming call spread of voltage is to the harm with electric unit.3, the automation of the combined floodgate of Shi Xianing.Characteristics are simple in structure, and are easy to maintenance, and reliable operation is convenient to install.

Description of drawings

Accompanying drawing is the circuit theory diagrams of the novel a kind of embodiment of this use.L1, L2, L3 are the live wires of power supply among the figure, N is a zero-power line, QS is a miniature circuit breaker, the FU fuse, KJ1, KJ2, KJ3 are the relays that has Chang Kai and normally-closed contact, KJ is disconnected to be cut-off relay, and KJ storage, KJ close, KJ jumps is respectively that energy storage relay, closing relay close tripping relay, and KT1, KT2, KT3 are the time relay.

Embodiment

With reference to accompanying drawing; full-automatic open-phase protection and time-delay combined floodgate device are to be connected with relay K J1 respectively between three live wires and zero line; KJ2; KJ3; three relay K J1; KJ2; connect with the normally-closed contact that cut-out relay KJ breaks in the normally opened contact series connection back of KJ3; three relay K J1; KJ2; the normally opened contact that breaks with cut-out relay KJ after the normally-closed contact parallel connection of KJ3 is connected; energy storage relay K J storage; closing relay KJ closes; tripping relay KJ jumps and three time relay KT1; KT2; be connected on after the KT3 parallel connection cut-out relay KJ disconnected often open and close between the normally-closed contact; incoming end at power supply connects miniature circuit breaker QS and fuse FU, at three relay K J1; KJ2; connect power supply indicator (not drawing among the figure) on the KJ3 respectively.

Its operation principle is:

1, the normal combined floodgate device course of work of sending a telegram here: be connected to universal circuit breaker top incoming call, be L1, L2, the L3 incoming call, relay K J1, KJ2, the KJ3 coil gets, KJ1 then, KJ2, the normal contact adhesive of KJ3, KJ1, KJ2, the normally closed interlock of KJ3 disconnects, this moment, time relay KJ1 coil got, the timing closing contact of KJ1 delay time 10 second closure, then energy storage relay K J storage coil gets, the normally open contact adhesive of KJ storage, then omnipotent breaker begins energy storage, and time relay KJ2 coil gets simultaneously, the timing closing contact of KJ2 delay time 5 second closure, closing relay KJ zygonema circle gets electric, and then the KJ normally open contact adhesive of closing starts the closing coil of omnipotent breaker, and omnipotent breaker is closed a floodgate, time relay KJ3 coil gets simultaneously, the timing closing contact of KJ3 delay time 2 second closure, make relay K J broken string enclose electricly, the normally open contact closure that KJ is disconnected, normally closed interlock disconnects, then KJ1, the KJ storage, KJ2, KJ closes, KJ3, the KJ dead electricity of breaking.

2, the incoming call open-phase protection and the delay protection course of work: when omnipotent breaker top incoming call; during certain phase phase shortage; then the relay of corresponding certain phase be some among KJ1, KJ2, the KJ3; can not adhesive; the device that then closes a floodgate is obstructed and can't work; simultaneously, certain phase power supply indicator of phase shortage does not work, and has protected the below power consumption equipment.Behind the incoming call; the normally closed interlock that is phase shortage: KJ1, KJ2 after omnipotent breaker closes a floodgate, KJ3 is shown in an open position; after certain phase dead electricity; a certain coil losing electricity among Dui Ying relay K J1, KJ2, the KJ3 then, its normally closed interlock closure is connected the coil that tripping relay KJ jumps; the KJ normally open contact closure of jumping then; start the tripgear of omnipotent breaker, omnipotent breaker is disconnected, the electric equipment on the circuit of protection below.

The delay protection course of work: when omnipotent breaker top incoming call is unstable; because the timing closing contact of time relay KJ1 was delayed time for 10 seconds; the incoming call instability that the secondary reclosing owing to transformer top overhead transmission line that just in time misses causes, and make power devices obtain stable power-supplying.

Claims

1; a kind of full-automatic open-phase protection time-delay combined floodgate device; it is characterized in that: between three live wires and zero line, be connected with relay (KJ1 respectively; KJ2; KJ3); three relay (KJ1; KJ2; KJ3) connect with the normally-closed contact of cut-out relay (KJ is disconnected) in normally opened contact series connection back; three relay (KJ1; KJ2; KJ3) connect energy storage relay (KJ storage) with the normally opened contact of cut-out relay (KJ is disconnected) after the normally-closed contact parallel connection; closing relay (KJ closes); tripping relay (KJ jumping) and three time relay (KT1; KT2; KT3) be connected on often opening and closing between the normally-closed contact of cut-out relay (KJ being disconnected) after the parallel connection.

2, full-automatic open-phase protection time-delay combined floodgate device according to claim 1, it is characterized in that: the incoming end at power supply connects A.C. contactor and fuse, connects power supply indicator respectively on three relays (KJ1, KJ2, KJ3).