CN2241403Y

CN2241403Y - Short circuit disconnection device

Info

Publication number: CN2241403Y
Application number: CN 95234220
Authority: CN
Inventors: 张军; 吕春顺
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-29
Filing date: 1995-06-29
Publication date: 1996-11-27
Anticipated expiration: 2005-06-29

Abstract

The utility model provides a short circuit disconnection device, which relates to a disconnecting switch assembly when power supply lines have short circuit faults. The utility model comprises a relay, wherein, two loops are connected in parallel on one end of coils of the relay; one loop is connected with a switch, and the other loop is connected in series with a capacitor and controlling contact points of the relay; a common port which controls the contact is connected with the capacitor; when the utility model is in a static state, a normally opened terminal is connected with the other terminal of the switch. The utility model has the advantages that the operation is convenient, the time for recovering electric supply is short, and the utility model is safe.

Description

The short circuit breaking device

Turn-off switchgear when the short circuit breaking device relates to supply line and short trouble occurs.

Protection to supply line's short trouble; general protective device is that the input in supply line is serially connected with the knife switch and the heat that are contained in the safety box and melts (insurance) silk, in case short trouble occurs, the electric current in the supply line increases rapidly; thermal melting wire is melted disconnected, cut off power supply.In the time of after short trouble is got rid of, need restoring electricity, want the opening safety box, the disconnection valve knife switch unclamps the fixedly screw of thermal melting wire, therefore, the time that have inconvenient operation, restores electricity, new thermal melting wire long, that change often closed the deficiency that requires to have hidden danger because of off-gauge.

The purpose of this utility model be design a kind of easy to operate, time of restoring electricity short, safe and reliable short circuit breaking device.

This short circuit breaking device comprises a relay, the coil two ends of this relay, one end is the common port of short circuit breaking device, be parallel with two loops on the other end, article one, be connected to switch on the loop, be in series with the control contact of electric capacity and relay on another loop, and the common port of control contact is connected with electric capacity, the Chang Kaiduan in when static state is connected with the other end of switch.

When installing and using, the public termination zero-power line of short circuit breaking device, the static Chang Kaiduan of relay control contact meets the input end of power firestreak, the output of the public termination power firestreak of relay control contact.During work, press switch, the engage relay coil power, there is electric current to flow through in this coil, the control contact action of relay, energized path, power to the load, trip switch, the operating current of relay coil is provided by the control contact of relay, the loop that electric capacity is formed, and keeps to the load continued power.The effect of electric capacity is step-down, and the operating current of relay coil is reduced, and reduces reactive loss.When short trouble appearred in load, the electric current in the relay coil reduced immediately, the static Chang Kaiduan of the control contact of relay was connected with common port become static normal-closed end to be connected with common port, and the live wire of cutting off the electricity supply stops to power to the load.When short trouble is got rid of, in the time of need restoring electricity, only need click switch and get final product, operation is very easy, and the time that restores electricity is short, and safe and reliable.

Shown in the accompanying drawing is the circuit structure schematic diagram of the embodiment of this short circuit breaking device.

In the present embodiment, the short circuit breaking device comprises that a model is the relay of JQX-40, the coil J two ends of this relay, one end is the common port M of short circuit breaking device, be parallel with two loops on the other end F, article one, be connected to push switch K on the loop, be in series with the capacitor C of 0.47 μ F and the control contact of relay on another loop, and the common port b of control contact is connected with capacitor C, normally opened contact a when static is connected with the other end of K switch, be parallel with show circuit between the common port M of common port b that controls the contact and short circuit breaking device, this show circuit comprises the LED and the dropping resistor R of series connection.

Claims

1, a kind of short circuit breaking device, it is characterized in that comprising a relay, the coil of this relay (J) two ends, one end is the common port (M) of short circuit breaking device, be parallel with two loops on the other end (F), article one, be connected to switch (K) on the loop, be in series with the control contact of electric capacity (C) and relay on another loop, and the common port (b) of control contact is connected with electric capacity (C), the Chang Kaiduan (a) in when static state is connected with the other end of switch (K).

2, according to the said short circuit breaking device of claim 1, it is characterized in that controlling between the common port (M) of the common port (b) of contact and short circuit breaking device and be parallel with show circuit, this show circuit comprises the light-emitting diode (LED) and the dropping resistor (R) of series connection.