CN203645293U

CN203645293U - Intelligent circuit breaker automatic reclosing device

Info

Publication number: CN203645293U
Application number: CN201320795799.9U
Authority: CN
Inventors: 李荣荣; 赵鸿鹏; 梁海涛
Original assignee: XUYI POWER SUPPLY Co OF JIANGSU ELECTRIC POWER Co; State Grid Corp of China SGCC; State Grid Jiangsu Electric Power Co Ltd
Current assignee: XUYI POWER SUPPLY Co OF JIANGSU ELECTRIC POWER Co; State Grid Corp of China SGCC; State Grid Jiangsu Electric Power Co Ltd
Priority date: 2013-12-06
Filing date: 2013-12-06
Publication date: 2014-06-11
Anticipated expiration: 2023-12-06

Abstract

The utility model discloses an automatic reconnecting device of an intelligent breaker. A main switch (S) and a fuse wire (R) are connected on a 220 V control power supply lead out from an upper pile head of an isolation disconnecting switch, and five branch circuits are parallelly connected on the main switch (S). The first branch circuit is connected with a work indication lamp (LD); the second branch circuit is a serial connection of a normally-closed auxiliary contact of a breaker (QF) and a time-delay coil of a connecting time-delay relay (KT1); the third branch circuit is connected in such a way that a normally-open contact of the connecting time-delay relay (KT1) is connected parallelly with a normally-closed contact of an intermediate relay (KA), and then connected serially with a normally-closed contact of an action time-delay relay (KT2) and a coil of the intermediate relay (KA); the fourth branch circuit is a serial connection of a normally-open contact of the intermediate relay (KA) and a coil of the action time-delay relay (KT2); and the fifth branch circuit is a parallel connection of the normally-open contact of the intermediate relay (KA) and a connecting button of the breaker (QF). The automatic reconnecting device achieves automatic reconnecting through adjustment and cooperation of elements such as the time-delay relays and the intermediate relay. The automatic reconnecting device is simple is circuit, reliable in action, and stable in operation.

Description

Intelligent breaker auto recloser

Technical field

The utility model relates to a kind of intelligent breaker reclosing device, especially meets the requirement of circuit breaker automatic reclosing after grid transmission by time-delay relay and auxiliary relay.

Background technology

In industrial and agricultural production and people's daily life; in low-voltage power distribution room, control switching on and off of power supply with intelligent breaker in a large number; this intelligent breaker has good protective value; collection short circuit, overload, decompression (under-voltage) are protected in one; in the time of the situations such as power supply is short-circuited, overload, decompression (under-voltage), can cut off the electricity supply rapidly, the safety of protection electrical network and power consumption equipment.But in the middle of practice, often there is applying unit that the decompression of intelligent breaker (under-voltage) function is cancelled, its objective is at electrical network and be struck by lightning or intelligent breaker not open circuit power supply department has a power failure in the situation that, and in the time that power system restoration is powered, do not need manually to remove operative intelligence circuit breaker and restore electricity rapidly and reduce repair and maintenance personnel's workload.There is a problem in this way: in the time that electrical network is subject to being struck by lightning, owing to not having decompression (under-voltage) defencive function may cause being struck by lightning and being damaged by the large area of the electric equipment in this intelligent breaker supply district.

summary of the invention

The purpose of this utility model is: intelligent breaker reclosing device is provided; if intelligent breaker needs artificial power transmission and removes decompression (under-voltage) coil to cause electric equipment in circuit breaker supply district to suffer the deficiencies such as broken by lightning after overcoming grid transmission; this device can not only keep the original all kinds of defencive functions of intelligent breaker normally to work; and can after grid transmission, automatically drop into intelligent breaker, reduce the maintenance cost that artificial power transmission is brought.

The utility model solves the technical scheme that its technical problem adopts: this circuit breaker reclosing device comprises master switch, fuse, relay indicating light, circuit breaker, combined floodgate time-delay relay, action delay relay and auxiliary relay, circuit connects as follows: the upper pile crown Yin Yi road 220V of isolation switch controls power supply, on power supply major loop, connect master switch and secondary circuit protection fuse, five road branch roads in parallel on master switch, one branch road connects relay indicating light, two branch roads are the normally closed auxiliary contact of circuit breaker and connecting of combined floodgate time-delay relay time delay coil, three branch roads are that the normally opened contact of combined floodgate time-delay relay and the normally-closed contact of auxiliary relay are composed in series the latching circuit of an auxiliary relay with the normally-closed contact of action delay relay and the coil of auxiliary relay after in parallel, four branch roads are connecting of the normally opened contact of auxiliary relay and the coil of action delay relay, five branch roads are that the normally opened contact of auxiliary relay and the switch knob of circuit breaker are in parallel.

Wherein, combined floodgate time-delay relay time delay 20S, action delay relay time delay 2S, fuse is got 5A.

The utility model coordinates by time-delay relay and auxiliary relay, after circuit power transmission, time delay 20S waits for after line voltage tends towards stability and moves breaker closing is devoted oneself to work, recycling time-delay relay time delay 2S is to ensure that reclosing moves successfully, and the state that whole device is returned to before sending a telegram here is waited for automatic reclosing action next time, coordinate and reached circuit breaker automatic reclosing by adjusting of the element such as time-delay relay, auxiliary relay, circuit is simple, reliable in action, stable.

Brief description of the drawings

Fig. 1 is intelligent breaker auto recloser circuit theory diagrams.

In figure: S master switch, R fuse, LD relay indicating light, QF circuit breaker, KT1 combined floodgate time-delay relay, KT2 action delay relay, KA auxiliary relay.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figure 1, this circuit breaker reclosing device comprises master switch S, fuse R, relay indicating light LD, circuit breaker Q F, combined floodgate time-delay relay KT1, action delay relay K T2 and auxiliary relay KA, its circuit connects as follows: the upper pile crown Yin Yi road 220V of isolation switch controls power supply, on power supply major loop, connect master switch S and secondary circuit protection fuse R, the upper five road branch roads in parallel of master switch S, one branch road connects relay indicating light LD, two branch roads are the normally closed auxiliary contact of circuit breaker Q F and connecting of combined floodgate time-delay relay KT1 time delay coil, three branch roads are that the normally opened contact of combined floodgate time-delay relay KT1 and the normally-closed contact of auxiliary relay KA are composed in series the latching circuit of an auxiliary relay KA with the normally-closed contact of action delay relay K T2 and the coil of auxiliary relay KA after in parallel, four branch roads are connecting of the normally opened contact of auxiliary relay KA and the coil of action delay relay K T2, five branch roads are that the normally opened contact of auxiliary relay KA is in parallel with the switch knob of circuit breaker Q F.

Wherein, combined floodgate time-delay relay KT1 time delay 20S, action delay relay K T2 time delay 2S, fuse R gets 5A.

The master switch S that closes, when after grid transmission, relay indicating light LD is bright, represents that this device comes into operation; In the time of circuit power transmission, circuit breaker Q F is at open position, and its normally closed auxiliary contact is in on-state, combined floodgate time-delay relay KT1 coil electricity, after 20S time delay, line voltage tends towards stability, combined floodgate time-delay relay KT1 normally opened contact closure, now action delay relay K T2 does not switch on, therefore its normally-closed contact is connected, auxiliary relay KA coil obtains electric, its normally opened contact is all closed, the switch knob two ends of circuit breaker Q F are connected, and its closing coil obtains electric, breaker closing; Simultaneously, auxiliary relay KA self-locking, action delay relay K T2 coil obtains electric, time delay 2S switch knob turn-on time during in order to simulating hand power transmission, after 2S, action delay relay K T2 normally-closed contact disconnects, auxiliary relay KA coil losing electricity, and its normally opened contact all disconnects, circuit returns to again the not state of power transmission of electrical network, prepares automatic reclosing action next time.

Claims

1. Intelligent circuit breaker automatic reclosing device, characterized in that: the circuit breaker reclosing device includes a master switch (S), a fuse (R), a working indicator light (LD), a circuit breaker (QF), a closing delay Time relay (KT1), action delay relay (KT2) and intermediate relay (KA), the circuit connections are as follows: the upper pile head of the isolation knife switch leads to a 220V control power supply, and the main circuit of the power supply is connected to the master switch (S) and The secondary circuit protection fuse (R), the master switch (S) is connected in parallel with five branches, one branch is connected to the working indicator light (LD), and the second branch is the normally closed auxiliary contact of the circuit breaker (QF) and The closing delay relay (KT1) delay coil is connected in series, and the three branches are the normally open contacts of the closing delay relay (KT1) and the normally closed contacts of the intermediate relay (KA) connected in parallel with the action delay relay ( The normally closed contact of KT2) and the coil of the intermediate relay (KA) are connected in series to form a self-locking circuit of the intermediate relay (KA), and the four branches are the normally open contacts of the intermediate relay (KA) and the action delay relay (KT2) The coils are connected in series, and the five branches are connected in parallel with the normally open contacts of the intermediate relay (KA) and the closing button of the circuit breaker (QF).

2. The intelligent circuit breaker automatic reclosing device according to claim 1, characterized in that: the closing delay relay (KT1) delays 20S, the action delay relay (KT2) delays 2S, and the fuse (R) takes 5A.