CN2247384Y - Single phase electric power load control switch - Google Patents
Single phase electric power load control switch Download PDFInfo
- Publication number
- CN2247384Y CN2247384Y CN 95241202 CN95241202U CN2247384Y CN 2247384 Y CN2247384 Y CN 2247384Y CN 95241202 CN95241202 CN 95241202 CN 95241202 U CN95241202 U CN 95241202U CN 2247384 Y CN2247384 Y CN 2247384Y
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- pin
- resistor
- circuit
- amplifier piece
- diode
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a single phase electric power load control switch which is composed of a load testing circuit, a rectifying, filtering and voltage stabilizing circuit, a control current comparison circuit, a delay circuit, a short-circuit current protection and comparison circuit and a tripping actuating mechanism. The switch is characterized in that a signal is tested from a phase wire of single phase power supply to realize delay tripping at the time of overload and fast tripping at the time of short circuit. The utility model has protection performances for short circuit and overload, has the advantages of strong anti-interference ability, simple structure and convenient adjustment, and is indispensable equipment for power supply departments reinforcing operating management and ensuring normal safe operation of electrical installation.
Description
The utility model belongs to low-voltage power load control technology field.
Along with the development of urban and rural economies, household electrical appliance quantity constantly increases, and the over capacity electricity consumption occurs, causes kilowatt-hour meter damage, electrical fire and make to supply the distribution transformer overload operation, jeopardizes safety.
The utility model provides a kind of user of making electricity consumption under authorized capacity, if the over capacity electricity consumption will be tripped, guarantees that the electricity consumption facility is in benign recurrent state all the time.
The utility model adopts detection signal from the phase line L of single phase poaer supply, realizes the excess load delay tripping, and short circuit is tripped rapidly, and the power supply of its control circuit is provided by detection signal; Circuit is made up of load testing circuit (T, C1), rectification filtering voltage stabilizing circuit (V1, V2, V3, V4, V12, R5, C2), Control current comparison circuit (A2, V5, V6, V7, R3, R4, R6, Rp), delay circuit (V8, R7, R8, R9, R10, C3, C4), short circuit current protection and comparison circuit (A1, V9, R1, R2, R13), tripping operation actuator (A3, VT, V10, V11, R11, R12, KM1, KM2); In the load testing circuit: the phase line L of single phase poaer supply is by the contact K of mechanical trip gear KM2, pass instrument transformer T, the zero line N of the coil one termination single phase poaer supply of machinery trip gear KM2, the other end is connected with phase line L by the contact KM1-1 of relay K M1, E, the F end of two termination capacitor C1 of instrument transformer T coil and rectifier bridge (V1, V2, V3, V4); In the rectification filtering voltage stabilizing circuit: the G termination common point of rectifier bridge (V1, V2, V3, V4), the H end is connected with diode V11 negative pole, relay K M1 coil one end, resistor R 1, each end of R3, R5, capacitor C2 is connected across G, the H two ends of rectifier bridge (V1, V2, V3, V4), and the negative pole of voltage-stabiliser tube V12 is connected with the other end of resistor R 5, the end of R6,4 pin of amplifier piece A1; In Control current comparison circuit and the delay circuit: resistor R 3, R4, after the potentiometer Rp series connection, the termination common point of R4,5 pin that the moving point of potentiometer Rp meets amplifier piece A2 are in-phase input end , resistor R 6 and positive and negative diode in series V5, V6, V7 is in series, the V7 negative pole connects common point, the positive pole of diode V7,6 pin that the negative pole of V6 meets amplifier piece A2 are inverting input , 7 pin of amplifier piece A2 are that output passes through resistor R 7, R10 is that in-phase input end is connected with 10 pin of amplifier piece A3, diode V8 is with after resistor R 9 is connected, be connected across resistor R 7 two ends, the negative pole of diode V8 is that output is connected with 7 pin of amplifier piece A2, after resistor R 8 is in parallel with capacitor C3, one termination common point, the other end and resistor R 7, R9, the R10 intersection point is connected; In short circuit current protection and the comparison circuit: the other end of resistor R 1, the one, connect common point by resistor R 2, another is to be that in-phase input end is connected with 3 pin of amplifier piece A1,2 pin of amplifier piece A1 be inverting input respectively with the positive pole of diode V5,9 pin of amplifier piece A3 are that inverting input is connected, 11 pin of amplifier piece A1 connect common point, 4 pin connect the negative pole of voltage-stabiliser tube V12,10 pin that the positive pole that 1 pin of amplifier piece A1 is an output by diode V9 meets amplifier piece A3 are in-phase output end , and resistor R 13 is connected across between 1 pin and common point of amplifier piece A1; In the tripping operation actuator: 10 pin that resistor R 11 is connected across amplifier piece A3 are that in-phase input end and 8 pin are between the output, 8 pin of A3 are connected with the base stage of triode VT by positive pole, the resistor R 12 of diode V10, the emitter of triode VT connects common point, (the H end of V1～V4) is connected, and the positive pole of diode V11 connects the collector electrode of triode VT for the coil of the collector electrode of triode VT by diode connected in parallel V11, relay K M1 and rectifier bridge.
The utlity model has the excess load delay tripping, short circuit is tripped rapidly, and circuit structure is simple, and is easy to adjust, and the power supply of control circuit is provided by detection signal, and do not have with electrical network and contact directly, consumed power not when non-loaded, anti-interference and overload capacity is strong.
Accompanying drawing 1 is the utility model calcspar;
Accompanying drawing 2 is the utility model electrical schematic diagrams;
Among the figure: A1, A2, A3 are the amplifier piece, and model is LM324; VT is a transistor; V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11 are diode, and V12 is a voltage-stabiliser tube; R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13 are resistor; Rp is a potentiometer; C1, C2, C3, C4 are capacitor; T is an instrument transformer; KM1 is a relay; KM2 is mechanical trip gear; L is the phase line in the single-phase alternating current; N is the zero line of single-phase alternating current.
Now in conjunction with the accompanying drawings the utility model is described further:
Press accompanying drawing 1, the Monophase electric power load control switch of 2 assemblings, when the user enables power supply, if the user is the over capacity electricity consumption, instrument transformer T in the load testing circuit goes up and produces AC signal, through rectifying and wave-filtering voltage stabilizing (V1, V2, V3, V4, V12, R5, C2), part signal offers amplifier piece (A1 as power supply, A2, A3), transistor VT, another part is by Control current comparison circuit (A2, V5, V6, V7, R3, R4, R6, Rp), delay circuit (V8, R7, R8, R9, R10, C3, C4) make the tripping operation (A3 of actuator, VT, V10, V11, R11, R12, KM1, KM2) work, the contact KM1-1 closure of relay K M1, moment, the coil of machinery trip gear KM2 has electric current to pass through, contact-actuating K disconnects rapidly, cuts off the electricity supply, and potentiometer Rp can change the Control current size; When being short-circuited in the subscriber line circuit; electric current by the instrument transformer T in the load testing circuit is very big; through short circuit current protection and comparison circuit (A1, V9, R1, R2, R13); make tripping operation actuator (A3, VT, V10, V11, R11, R12, KM1, KM2) work; the contact KM1-1 closure of relay K M1, moment, mechanical trip gear KM2 coil has electric current to pass through; contact-actuating K disconnects rapidly, reaches and cuts off the electricity supply.
Claims (1)
1, a kind of Monophase electric power load control switch is characterized in that: switch adopts detection signal from the phase line L of single phase poaer supply, realizes the excess load delay tripping, and short circuit is tripped rapidly, and the power supply of its control circuit is provided by detection signal; Circuit is made up of load testing circuit (T, C1), rectification filtering voltage stabilizing circuit (V1, V2, V3, V4, V12, R5, C2), Control current comparison circuit (A2, V5, V6, V7, R3, R4, R6, Rp), delay circuit (V8, R7, R8, R9, R10, C3, C4), short circuit current protection and comparison circuit (A1, V9, R1, R2, R13), tripping operation actuator (A3, VT, V10, V11, R11, R12, KM1, KM2); In the load testing circuit: the phase line L of single phase poaer supply is by the contact K of mechanical trip gear KM2, pass instrument transformer T, the zero line N of machinery trip gear KM2 coil one termination single phase poaer supply, the other end is connected with phase line L by the contact KM1-1 of relay K M1, E, the F end of two termination capacitor C1 of instrument transformer T coil and rectifier bridge (V1, V2, V3, V4); In the rectification filtering voltage stabilizing circuit: the G termination common point of rectifier bridge (V1, V2, V3, V4), the H end is connected with diode V11 negative pole, relay K M1 coil one end, resistor R 1, each end of R3, R5, capacitor C2 is connected across G, the H two ends of rectifier bridge (V1, V2, V3, V4), and the negative pole of voltage-stabiliser tube V12 is connected with the other end of resistor R 5, the end of R6,4 pin of amplifier piece A1; In Control current comparison circuit and the delay circuit: resistor R 3, R4, after the potentiometer Rp series connection, the termination common point of R4,5 pin that the moving point of potentiometer Rp meets amplifier piece A2 are in-phase input end , resistor R 6 and positive and negative diode in series V5, V6, V7 is in series, the V7 negative pole connects common point, the positive pole of diode V7,6 pin that the negative pole of V6 meets amplifier piece A2 are inverting input , 7 pin of amplifier piece A2 are that output passes through resistor R 7, R10 is that in-phase input end is connected with 10 pin of amplifier piece A3, diode V8 is with after resistor R 9 is connected, be connected across resistor R 7 two ends, the negative pole of diode V8 is that output is connected with 7 pin of amplifier piece A2, after resistor R 8 is in parallel with capacitor C3, one termination common point, the other end and resistor R 7, R9, the R10 intersection point is connected; In short circuit current protection and the comparison circuit: the other end of resistor R 1, the one, connect common point by resistor R 2, another is to be that in-phase input end is connected with 3 pin of amplifier piece A1,2 pin of amplifier piece A1 be inverting input respectively with the positive pole of diode V5,9 pin of amplifier piece A3 are that inverting input is connected, 11 pin of amplifier piece A1 connect common point, 4 pin connect the negative pole of voltage-stabiliser tube V12,10 pin that the positive pole that 1 pin of amplifier piece A1 is an output by diode V9 meets amplifier piece A3 are in-phase output end , and resistor R 13 is connected across between 1 pin and common point of amplifier piece A1; In the tripping operation actuator: 10 pin that resistor R 11 is connected across amplifier piece A3 are that in-phase input end and 8 pin are between the output, 8 pin of A3 are connected with the base stage of triode VT by positive pole, the resistor R 12 of diode V10, the emitter of triode VT connects common point, (the H end of V1～V4) is connected, and the positive pole of diode V11 connects the collector electrode of triode VT for the coil of the collector electrode of triode VT by diode connected in parallel V11, relay K M1 and rectifier bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95241202 CN2247384Y (en) | 1995-12-29 | 1995-12-29 | Single phase electric power load control switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95241202 CN2247384Y (en) | 1995-12-29 | 1995-12-29 | Single phase electric power load control switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2247384Y true CN2247384Y (en) | 1997-02-12 |
Family
ID=33882632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95241202 Expired - Fee Related CN2247384Y (en) | 1995-12-29 | 1995-12-29 | Single phase electric power load control switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2247384Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568940A (en) * | 2010-12-15 | 2012-07-11 | 上海良信电器股份有限公司 | Low voltage operation delay protection drive circuit |
| CN103439878A (en) * | 2013-08-28 | 2013-12-11 | 淮北市平祥感应炉有限公司 | Second-time switch-on resistant control device |
| CN105186524A (en) * | 2015-08-19 | 2015-12-23 | 国家电网公司 | Method, device, and system for exceeded capacity of power consumer |
-
1995
- 1995-12-29 CN CN 95241202 patent/CN2247384Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568940A (en) * | 2010-12-15 | 2012-07-11 | 上海良信电器股份有限公司 | Low voltage operation delay protection drive circuit |
| CN102568940B (en) * | 2010-12-15 | 2016-01-27 | 上海良信电器股份有限公司 | The delay protection drive circuit of low voltage operating |
| CN103439878A (en) * | 2013-08-28 | 2013-12-11 | 淮北市平祥感应炉有限公司 | Second-time switch-on resistant control device |
| CN103439878B (en) * | 2013-08-28 | 2016-04-13 | 淮北市平祥感应炉有限公司 | Anti-secondary closing control device |
| CN105186524A (en) * | 2015-08-19 | 2015-12-23 | 国家电网公司 | Method, device, and system for exceeded capacity of power consumer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |