CN2596641Y

CN2596641Y - Silicon chain break circuit protector

Info

Publication number: CN2596641Y
Application number: CN 03200456
Authority: CN
Inventors: 刘健; 刘福强
Original assignee: RIJIA POWER CO Ltd BEIJING
Current assignee: RIJIA POWER CO Ltd BEIJING
Priority date: 2003-01-08
Filing date: 2003-01-08
Publication date: 2003-12-31
Anticipated expiration: 2013-01-08

Abstract

The utility model discloses a silicon chain broken circuit protector, which comprises a voltage-stabilizing pipe and controlled silicon modules, wherein, the voltage-stabilizing pipe is connected with a silicon chain in parallel in the reverse direction and is connected with a trigger electrodes of each of the controlled silicon modules; the controlled silicon modules are connected with both ends of the silicon chain. The device uses the terminal voltage of each stage of the silicon chain as the main criterion for the judgement whether the silicon chain is broken or not broken; the utility model has the advantages of accuracy and reliability. By the characteristic of the high speed conduction of controllable silicon, a broken point can be shortly connected within the period of milliseconds; load on a control bus can not feel the loss of electricity; the controllable silicon is still conducted, after trigger signals are removed. Only when the silicon chain is repaired, current which passes through the inner side of the controllable silicon returns to zero automatically, the recovery of controllable silicon is finished, and therefore, a circuit of the silicon chain can not have the situation of broken circuit.

Description

Silicon chain broken circuit protecting equipment

Technical field

The utility model relates to a kind of broken circuit protecting equipment, and particularly a kind of broken circuit protecting equipment that is applicable to silicon chain in the DC power supply belongs to power technique fields.

Background technology

In the DC power supply that electric power system is at present used control bus automatic voltage device miscellaneous is arranged, wherein the most reliable is to adopt the squash type silicon chain device to carry out pressure regulation.

Squash type silicon chain is that a plurality of diode silicon chips and radiator are pressed together with mechanical way, and support is done with insulating material in both sides.In the clamping device on both sides brute spring is arranged, can avoid because the device distortion of expanding with heat and contract with cold and causing.Under heavy current impact, the general only meeting of diode short circuit can not opened circuit.The individual diode short circuit only can reduce the 0.6V pressure drop, can not cause big influence to system, particularly can not cause damage to the user.Because the silicon chain is in key position in electric power system in DC power supply, in case the silicon chain opens circuit, can make transformer station be in full station unprotect state, consequence is hardly imaginable.Therefore, the safe operation of DC power supply is paid much attention in electric power system, and in DC power supply, it is very important that the safety and stability of silicon chain just seems.

In electric power system, in order to improve the reliability of silicon chain, regulation silicon chain must have backup.Common treating method is that two silicon chains are together in parallel now.The shortcoming of this method is: the equal flow problem of cost height, two silicon chains is difficult to solve.Therefore, this method is not a kind of desirable solution.

Summary of the invention

The technical problems to be solved in the utility model is at electric power system to provide a kind of silicon chain broken circuit protecting equipment that can improve silicon chain operational reliability with the specific (special) requirements of DC power supply to silicon chain safety.

For realizing above-mentioned purpose, the utility model adopts following technical scheme:

A kind of silicon chain broken circuit protecting equipment is characterized in that:

Described silicon chain short-circuit protection comprises voltage-stabiliser tube and silicon controlled module, wherein voltage-stabiliser tube and silicon chain reverse parallel connection, and connect the trigger electrode of silicon controlled module;

Described silicon controlled module is connected on the two ends of silicon chain.

Silicon chain broken circuit protecting equipment described in the utility model has following outstanding characteristics:

(1) the utility model utilizes the main criterion whether terminal voltage of every grade of silicon chain opens circuit as the silicon chain, accurately and reliably.

(2) the utility model utilizes the fireballing characteristics of controllable silicon conducting, can Millisecond in the time with the trip point short circuit, the load of control on the bus discovered less than dead electricity once.

(3) controllable silicon in the utility model still continues conducting after removing triggering signal, and only when the silicon chain overhauled, the electric current that controllable silicon inside is passed through returned zero naturally, and controllable silicon just recovers to end.So just guaranteed that situation about opening circuit can not appear in silicon chain place circuit again.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Fig. 1 is an external cabling schematic diagram of the present utility model.

Fig. 2 is the circuit theory diagrams of an embodiment of the present utility model.

Embodiment

As shown in Figure 1, the utility model is at the voltage-stabiliser tube of a 12V of each silicon chain next door reverse parallel connection, and voltage-stabiliser tube connects the silicon controlled trigger electrode, and silicon controlled module is connected on the two ends of silicon chain, in case when the silicon chain breaks down, then be used for the silicon chain that short circuit has disconnected.The basic ideas of this design are: when silicon chain operate as normal, its both end voltage can not surpass 9V, and the voltage-stabiliser tube of 12V can bear fully, so silicon controlled module can not be triggered.In case when the silicon chain occurring and opening circuit, the voltage of this group silicon chain can directly rise to system voltage, is 220V or higher.The voltage-stabiliser tube of 12V can not bear such high pressure, and it is breakdown to be bound to, and breakdown current then just in time triggers controllable silicon, will get up because of silicon chain damage dead circuit short circuit again.Controllable silicon has the fireballing characteristics of conducting, can Millisecond in the time with the trip point short circuit, make the load of control on the bus be not aware of dead electricity once, even and after conducting, remove triggering signal, controllable silicon also can be kept conducting.Only when the silicon chain overhauled, the electric current that controllable silicon inside is passed through returned zero naturally, and controllable silicon could recover to end.So just guaranteed that situation about opening circuit can not appear in silicon chain place circuit again.

Fig. 2 is the circuit theory diagrams of a specific embodiment of the utility model.In this embodiment, increased the function of reporting fault by sounding and flash of light mode.This function is achieved in that the DW1～DW5 among Fig. 2 is voltage-stabiliser tube, and each voltage-stabiliser tube all connects the silicon controlled trigger electrode.Simultaneously, each voltage-stabiliser tube optical relay of all connecting, the output of optical relay and power end are all respectively and connect.The S0 pin of output termination rest-set flip-flop chip IC 2, the R0 pin then connects a reset switch, corresponding Q0 pin sending and receiving optical diode D1, D1 connects the base stage of triode T through resistance R 6, and the collector electrode of triode T then connects a relay K.Relay K and loud speaker FM are in parallel.

When voltage stabilizing didoe was breakdown, breakdown current also triggered optical relay simultaneously, and it is high level that optical relay can make the S0 pin.According to the characteristic of rest-set flip-flop, the Q0 pin also is a high level, so that light-emitting diode D1 begins is luminous, loud speaker FM then begins sounding, call user's attention.In a single day the reset switch that the R0 pin is connect is pressed, and then the R0 pin also is a high level, so Q0 becomes low level, and D1 and FM will no longer work, and realize resetting of system thus.This moment, controllable silicon still can conducting owing to the special on state characteristic of silicon controlled.

The output of optical relay and connecing in the foregoing circuit is in order to guarantee no matter be which silicon chain is out of order and can both in time reports to the police like this.

What need statement is that specific embodiment of the present utility model has been done detailed explanation to content of the present utility model.For one of ordinary skill in the art, the any conspicuous change of under the prerequisite that does not deviate from the utility model spirit, it being done, particularly, all constitute to the utility model infringement of patent right, with corresponding legal responsibilities to the replacement that is equal to of some parts.

Claims

1. silicon chain broken circuit protecting equipment is characterized in that:

2. silicon chain broken circuit protecting equipment as claimed in claim 1 is characterized in that:

Described voltage-stabiliser tube is connected with optical relay, and the output of described optical relay and power end are respectively and connect; The S0 pin of output termination rest-set flip-flop, the R0 pin of described rest-set flip-flop connects a reset switch, Q0 pin sending and receiving optical diode, and described photodiode connects the base stage of a triode, the collector electrode of described triode connects a relay, and described relay and a loud speaker are in parallel.