CN2041865U

CN2041865U - Automatic control switch for electric power

Info

Publication number: CN2041865U
Application number: CN 88219779
Authority: CN
Inventors: 安承豪
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-07-09
Filing date: 1988-07-09
Publication date: 1989-07-26

Abstract

The utility model relates to an automatic control switch for electric power for living when an electric power system restricts the use of electricity. Any remote-control facilities are not needed; when industrial power is needed to be restricted, only the line outage of a substation is needed, and the electricity is supplied after five seconds; all the automatic control switches of the line can be in automatic tripping and latching. When the recovery is needed, only line outage is needed again, after 15 seconds, the electricity is supplied again, and thus all the switches can automatically switch on. The automatic control switch also has the function of the overload control and time control for electric power and can be in automatic tripping and can automatically switch on, and the labor management and operation are not needed. The main switch adopts the new technology of electronic arc extinguishing, and the main contact adopts the opening and closing without an electrical arc; the whole devices are closed in the same casing, thus facilitating the sealing.

Description

Automatic control switch for electric power

The utility model is to control living load about electric power system in order to large tracts of land, and what guarantee municipal administration life load uses the electric control automatic switch.Because of the nervous power failure of often operating a switch of power supply, become national problem at present, because power electricity consumption and household electricity all are same high-voltage line power supplies, the result of power cuts to limit consumption has influenced household electricity and has caused the people discontented.A restraint power electricity consumption does not influence household electricity when accomplishing power cuts to limit consumption, all taked multiple measure both at home and abroad, wherein more advanced method is employing " audio frequency control " and " radio control " etc., go these device technique complexity of switch at steering maneuver family with these remote controls, the cost height, what have also needs import components and parts or package unit, and pilot is being carried out in also just indivedual at home at present areas.

The purpose of this utility model, be to be to make a kind of novel electric control automatic switch of using, and adopt simple program to stop sending the method for electricity, remove to handle these switches, reach large tracts of land control power family electricity consumption simultaneously and do not influence the purpose of household electricity, do not need other any active remote signal device.This switch is contained in user's power master switch or low pressure branch switch place, when the need power cuts to limit consumption, as long as in public transformer substation, high-tension line is operated a switch, having a power failure closed a floodgate in ten seconds behind about five seconds send, then all this switches just are in the state of operating a switch on this circuit, when need recovering as long as close a floodgate after high-tension line operated a switch 15 seconds, just automatic closing telegram in reply of all this switches then.(can adjust as required blanking time) this switch also is equipped with the clock device, can have a power failure and send the user by giving fixing time.The excess load automatic control equipment also is housed simultaneously, when the electricity consumption of user's excess load, gives the alarm earlier, as the untimely minimizing load of user, just automatic trip has a power failure after about 15 seconds, automatic closing send after about five minutes, surpass again and stop again, give constant load with till interior until reducing to.For preventing switch main contacts scaling loss, adopt electronics arc extinguishing new technology, at main contact Liang Duan And connection bidirectional triode thyristor, utilize the cooperation of switch self auxiliary contact, realize that the switch main contact does not have the electric arc opening and closing, to significantly reduce the switch maintenance capacity.

Below in conjunction with description of drawings embodiment of the present utility model.

The utility model is formed (Fig. 1) by the control loop of rationing the power supply, excess load control loop, timing control loop and non electric-arc switch.

Ration the power supply control loop by time relay S ₁, S ₂With indicator light N ₁Current-limiting resistance R ₁Form.

Excess load control loop (H) is by little shape current transformer L _1～3, variable resistor R _7～9, one-way SCR G, time relay S ₃, S ₄, Shanghai ripple capacitor C ₄, C ₅, diode D _1～4, regulate resistance R ₁₀, current-limiting resistance R ₂, R ₁₁, self check button T, external alarm L and indicator light N ₂Form.(Fig. 2)

Timing control loop is by timing switch clock Z, indicator light N ₃With current-limiting resistance R ₃Form.

Non electric-arc switch is by relay J, main switch Cj, bidirectional triode thyristor SCR _1～3, the protection component resistance R _4～6, capacitor C _1～3And the protection fuse is formed.

Time relay S ₁, S ₂Be deferred action type after the decompression (available contactor and mechanical delay device are in conjunction with substituting), S ₁Transfer to decompression S after about 10 seconds _1～1Closure, S _1～2Disconnect S ₂Transfer to decompression S after about 3 seconds _2～1, S _2～2Disconnect.

Time relay S ₃, S ₄Be the back deferred action type that pressurizes, S ₃Transfer to pressurization back S _3～1Closed immediately, S _3～215 seconds closures, S ₄Transfer to pressurization back S _4～1Disconnect S immediately _4～2Closed immediately S _4～3Disconnect after five minutes.

Main switch Cj often opens auxiliary contact Cj _1～3Adjust the distance (former about 4～5 millimeters are reduced to about 2～2.5 millimeters) that reduces between its sound contact, make Cj when closing a floodgate _1～3Connect prior to main contact, disconnect in main contact after when opening a sluice gate.

Under normal circumstances, X, Y access control voltage (service entrance switch of taking from the difficult outage voluntarily of user is outer), S at this moment ₂Electricity is arranged, S _2～1, S _2～2Closure, S ₁Electric S is arranged _1～2Closure, S _1～1Disconnect S _2～3Closing relay j has electricity, connects main switch Cj combined floodgate and send.When the need power cuts to limit consumption, after the high-tension line power failure, S ₁, S ₂, j, Cj decompression simultaneously, main switch disconnects, S after three seconds _2～1Disconnect, send electricity with high-tension line after five seconds, this moment is because of S _2～1Disconnect S ₂Do not restart (S ₁Reinstatement attitude in electricity back is arranged) Cj do not have electricity, and main switch can not close a floodgate.When need recover to send electricity, high-tension line had a power failure sent electricity in 15 seconds again, because of S after 10 seconds _1～1Closure, incoming call back S ₂Electricity is arranged, the as follows above-mentioned former electronic work order of sending, main switch recovers to close a floodgate and send.

When the electricity consumption of user's excess load, load current is through current transformer L _1～3At variable resistor R _7～9Last formation one alternating voltage, (this magnitude of voltage can change by regulating variable resistor) is through diode D _1～3Rectification C ₄Behind the ripple of Shanghai, trigger the one-way SCR conducting, time relay S ₃Electricity is arranged, S _3～1Closure is sent alarm signal, S after 15 seconds _3～2Closed S ₄Electricity is arranged, S _4～1Disconnecting relay j does not have electric main switch Cj tripping operation, because of S _4～2Closure, S ₄Maintain electricity, S after five minutes _4～3Disconnect S ₄Decompression restores to the original state, S _4～1Closing relay j has electric main switch combined floodgate to send.

Regularly transmission or not control is with the contact of timing switch clock Z, removes control relay j, makes regularly tripping and closing of main switch.

Main switch bidirectional triode thyristor SCR _1～3The principle of arc extinguishing is: its auxiliary contact Cj when closing a floodgate _1～3Connect prior to main contact, trigger the conducting of controllable silicon elder generation, main contact closes its operating in short-circuit and shunt immediately, and both end voltage is very little so do not produce electric arc during because of the controllable silicon conducting.When opening a sluice gate, main contact is prior to Cj _1～3Disconnect, to controllable silicon, Cj1～3 disconnect subsequently with current transfer in the controllable silicon conducting, and controllable silicon loses trigger voltage and block electric current when the main circuit voltage zero passage.No matter open a sluice gate or close a floodgate, the controllable silicon ON time is 0～0.01 second.

Use for ease of the scene, this device both can be loaded in the same shell, also can make by the control loop of rationing the power supply separately is the automatic control equipment (Fig. 3) that the main drawing-path electricity limiting protective lighting of forming is used, it by shell 1., indicator light 2., the time relay is 3., auxiliary relay 4., 5. operation counter is controlled voltage and is inserted terminal 6., and 7. control main switch breaker tripping and closing terminal is formed.Also can make the excess load automatic control switch of forming by excess load control loop and non electric-arc switch (Fig. 4) separately, it by little shape current transformer 1., no electric arc main switch 2., the time relay 3., shell 4., load definite value turn-knob is 5., self-test switch 6., external alert signal terminal 7., 8. indicator light is formed.Also can fit together above-mentioned two kinds of structures and switch clock, bring into play multiple function simultaneously.

Oabc is an electric power incoming line in the accompanying drawing.

The utility model has following accompanying drawing:

Fig. 1 is for using electric control automatic switch whole circuit figure.

Fig. 2 is the excess load control circuit part (H among Fig. 1) among Fig. 1.

Fig. 3 is a drawing-path electricity limiting protective lighting automatic control equipment profile schematic diagram.

Fig. 4 is excess load control automatic switch profile schematic diagram.

Claims

1, a kind of be used for the electric power system drawing-path electricity limiting can the protective lighting electricity consumption and the electricity consumption of limited subscriber excess load use the electric control automatic switch.It is characterized in that: form by the control loop of rationing the power supply, excess load control loop and non electric-arc switch loop.The control loop of rationing the power supply is added with control voltage, is the opening and closing signal and the locking power supply of switch, comes the disconnection of remote control switch and closes with the length of power supply power-off time.Set value signal when the excess load control loop takes out different load respectively by little shape current transformer that seals in the electricity consumption major loop and variable resistor is in order to drive the subsequent conditioning circuit action.The main Jie Dian And connection bidirectional triode thyristor of switch utilizes the cooperation of switch auxiliary electrical point, triggers controllable silicon, and the transfer load electric current makes the main contact opening and closing not produce electric arc.

2, the electric control automatic switch of using according to claim 1 is characterized in that: the control device of rationing the power supply, adopted with the signal remote control mode of power-off time length, and constitute the different time of adjusting respectively with the deferred action time relay after two decompressions.Short supply interruption is for opening a sluice gate signal, and outage is switching signal when long slightly, in can be from the electric power system numerous powering-off state of this device, discerns these signals, can be loaded on opening a sluice gate or closing a floodgate of all this switches among the user in the remote control of public electric substation.

3, the electric control automatic switch of using according to claim 1, it is characterized in that: the main contact two ends And that is associated in regular tap with Shuan to Ke Kong Gui And changes the auxiliary contact distance of switch own little, it is connected prior to main contact when closing a floodgate, disconnect in main contact after when opening a sluice gate, instantaneous trigger bidirectional triode thyristor conducting before main contact switches on and off, load current is transferred to bidirectional triode thyristor, dam when the voltage zero-cross by bidirectional triode thyristor when opening a sluice gate, main contact is with the bidirectional triode thyristor short circuit during combined floodgate, realize that main contact does not have electric arc and opens, close, the ON time of bidirectional triode thyristor is 0～0.01 second.