CN107732862B - Three-phase four-wire omnibearing multifunctional accident electric control protection switch - Google Patents
Three-phase four-wire omnibearing multifunctional accident electric control protection switch Download PDFInfo
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- CN107732862B CN107732862B CN201710990788.9A CN201710990788A CN107732862B CN 107732862 B CN107732862 B CN 107732862B CN 201710990788 A CN201710990788 A CN 201710990788A CN 107732862 B CN107732862 B CN 107732862B
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- 239000003990 capacitor Substances 0.000 claims description 24
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- 229910052710 silicon Inorganic materials 0.000 claims description 12
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- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 abstract description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/004—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of incorrect phase sequence; with switching for obtaining correct phase sequence
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/042—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned combined with means for locating the fault
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/12—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to undesired approach to, or touching of, live parts by living beings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0822—Integrated protection, motor control centres
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Abstract
The invention discloses a three-phase four-wire omnibearing multifunctional accident electric control protection switch, which comprises: the phase sequence protection circuit, the phase-lack protection circuit, the artificial electric shock protection circuit and the execution circuit, wherein the phase sequence protection circuit and the phase-lack protection circuit are all connected in parallel with a main empty switch incoming line, the execution circuit passes through four transformers of the artificial electric shock protection circuit and is connected in parallel with a main empty switch outgoing line, three protection circuits and the execution circuit are controlled at any time through the transformers, when a circuit breaks down, the transformers in the three protection circuits can send fault information to the transformers in the execution circuit at the first time, and the transformers in the execution circuit control a relay to trip, so that protection is realized. The invention has the advantages that: (1) The circuit has simple structure, small volume, low cost and convenient installation; (2) The comprehensive protection device can comprehensively protect various faults generated in the three-phase line, and has the advantages of multifunction, omnibearing, multi-purpose, stable operation and the like.
Description
Technical Field
The invention relates to a protection switch, in particular to a three-phase four-wire omnibearing multifunctional accident electric control protection switch, and belongs to the technical field of electric appliances.
Background
At present, the common accident electric control protection switch in the market mainly has the following problems:
1. The existing accident electric control protection switch has few functions, can handle single faults, can only realize the overload of line voltage and the over-voltage protection and short-circuit protection caused by short circuit under the normal use condition, and cannot protect artificial electric shock, equipment leakage, line leakage, grounding wire energization and the like.
2. The power supply guarantee of the accident electric control protection switch and the original components thereof are not suitable for the change of the power supply voltage, the application range is narrow, the situation of wrong wiring is likely to occur in the process of laying, installing and maintaining the power supply circuit, no electricity is caused or the power supply circuit is connected with 220V to 380V, and the existing protection switch cannot adapt to the change of the voltage, so that the omnibearing work cannot be realized.
3. The function is single, only can cut off the circuit, can not judge the fault cause and make fault cause instruction, for example: the fault line phase is possibly connected in the wiring process of the power line, so that the motor is reversed or burnt out, and the existing accident electric control protection switch can not judge the fault reason and indicate the fault reason.
4. The existing accident electric control protection switch is effective and safe for protecting the motor, but has very low safety coefficient and sensitivity for protecting the human electric shock, the sensitive current of the human body is 5mA, and the existing product is more than 30mA, so that the personal safety cannot be ensured.
5. The existing accident electric control protection switch has complex working principle and complex circuit design, and causes large product volume and high manufacturing cost.
Disclosure of Invention
The invention aims to solve the defects of the prior art, and provides an omnibearing multifunctional accident electric control protection switch which has a simple circuit structure and stable and reliable performance and can comprehensively protect various faults (such as artificial electric shock, equipment leakage, circuit leakage, grounding wire energization, phase failure and phase sequence dislocation) generated in a three-phase circuit.
In order to achieve the above object, the present invention adopts the following technical scheme:
The utility model provides a multi-functional accident automatically controlled protection switch of three-phase four-wire all-round which characterized in that includes: a phase sequence protection circuit, a phase-lack protection circuit, a man-made electric shock protection circuit and an execution circuit, wherein,
The phase sequence protection circuit is connected with a main air switch incoming line in parallel and comprises a resistor R4, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a shift capacitor C3, a light emitting diode F1 and a transformer H4, wherein the resistor R10 is connected with the resistor R9 in series, the other end of the resistor R10 is connected with a live wire A, the other end of the resistor R9 is simultaneously connected with the shift capacitor C3, the light emitting diode F1 and one end of the resistor R8, the other end of the shift capacitor C3 is connected with a live wire B, the other end of the light emitting diode F1 and the other end of the resistor R8 are simultaneously connected with one end of the resistor R7, the resistor R4 is connected with the resistor R7 in series, and the other end of the resistor R4 passes through the transformer H4 to be connected with the live wire C;
The open-phase protection circuit is also connected with a main air switch inlet in parallel, and consists of a resistor R5, a resistor R6, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a rectifier diode D4, a voltage stabilizing diode E2, a light emitting diode F2, a test button T and a transformer H2, wherein one end of the resistor R14, the resistor R13 and one end of the resistor R12 are respectively connected with a fire wire A, a fire wire B and a fire wire C, the other end of the resistor R14, the resistor R13 and the other end of the resistor R12 are simultaneously connected with one end of the resistor R5, the resistor R6 is connected with the resistor R5 in series, the rectifier diode D4 is connected with the light emitting diode F2 in series, the voltage stabilizing diode E2 is connected with the light emitting diode F2 in parallel, the other end of the rectifier diode D4 is connected with a junction of the resistor R5 and the resistor R6, the resistor R11 is connected with the test button T in series, the other end of the resistor R11 is connected with the fire wire C, the other end of the resistor R6, the other end of the light emitting diode F2 and the other end of the test button T are connected with the zero line N through the transformer H2;
The execution circuit is connected with a main air switch outgoing line in parallel, and is composed of a resistor R1, a resistor R2, a displacement capacitor C1, a displacement capacitor C2, a rectification diode D1, a rectification diode D2, a rectification diode D3, a voltage stabilizing diode E1, a silicon controlled rectifier ScR, a relay B1, a relay B2 and a mutual inductor H3, wherein one end of the rectification diode D3, the rectification diode D2 and one end of the rectification diode D1 are respectively connected with a live wire A, a live wire B and a live wire C, the rectification diode D3, the rectification diode D2 and the other end of the rectification diode D1 are simultaneously connected with one end of the resistor R2, the voltage stabilizing diode E1, the displacement capacitor C2 and the relay B2 are connected in parallel, a parallel circuit (a parallel circuit where the displacement capacitor C2 is located) is connected with the resistor R2 in series, a silicon controlled rectifier ScR is connected with the parallel circuit (a parallel circuit where the displacement capacitor C2 is located), the silicon controlled rectifier diode D1 is connected with one end of a parallel connection point of the silicon controlled rectifier circuit (the parallel circuit where the displacement capacitor C2 is located) is connected with the zero wire B1 through the mutual inductor H3, the other end of the silicon controlled rectifier circuit (the parallel circuit where the displacement capacitor C1 is located) is connected with the other end of the rectification diode D1 and the zero wire B2 is connected with the zero wire D1 in parallel, and the other end of the parallel connection point of the parallel connection circuit is connected with the zero wire D1;
the artificial electric shock protection circuit consists of a resistor R3 and four transformers H1, wherein the four transformers H1 are respectively arranged on four wires of the execution circuit, which are connected with a live wire A, a live wire B, a live wire C and a zero wire N, one end of the resistor R3 is connected with the wire of the execution circuit, which is connected with the zero wire N, the other end of the resistor R3 is connected with the equipment protection zero wire, and the four wires of the execution circuit are led out to output one before passing through the four transformers H1 of the artificial electric shock protection circuit;
The input end of the main empty switch is input, and the output end is output two.
The invention has the advantages that:
(1) The three-phase four-wire omnibearing multifunctional accident electric control protection switch circuit has the advantages of simple structure, small volume, low cost and convenient installation;
(2) The three-phase four-wire omnibearing multifunctional accident electric control protection switch is unique in design principle, realizes control at any time through the transformer, and when a line fails, the transformer in the phase sequence protection circuit, the phase-failure protection circuit or the artificial electric shock protection circuit can send failure information to the transformer in the execution circuit at the first time, and the transformer in the execution circuit controls the relay B1 to trip, so that protection is realized;
(3) The three-phase four-wire omnibearing multifunctional accident electric control protection switch can comprehensively protect various faults generated in a three-phase line, has the advantages of multifunction, omnibearing, multipurpose, stable operation and the like, solves the problem of overhigh voltage protection caused by overload and short circuit of line voltage, realizes electric control protection on accidents such as artificial electric shock, equipment electric leakage, line electric leakage, grounding wire electrifying and the like, overcomes the defects and the shortcomings of the existing accident electric control protection switch technology in the current market, can timely cut off power within 1 second, ensures personnel safety, ensures equipment and line safety, and greatly improves the safety coefficient of electric appliance lines and equipment.
Drawings
Fig. 1 is a circuit diagram of the three-phase four-wire omnibearing multifunctional accident electric control protection switch of the invention.
Detailed Description
The invention is described in detail below with reference to the drawings and the specific embodiments.
A first part: circuit structure
Referring to fig. 1, the three-phase four-wire omnibearing multifunctional accident electric control protection switch of the present invention comprises: phase sequence protection circuit, open-phase protection circuit, artificial electric shock protection circuit and executive circuit.
The structure of each circuit will be specifically described below.
1. Phase sequence protection circuit
Referring to fig. 1, the phase sequence protection circuit is connected in parallel with the main air switch incoming line, and is composed of a resistor R4, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a shift capacitor C3, a light emitting diode F1 and a transformer H4.
The resistor R10 is connected with the resistor R9 in series, the other end of the resistor R10 is connected with the live wire A, and the other end of the resistor R9 is simultaneously connected with the shift capacitor C3, the light emitting diode F1 and one end of the resistor R8.
The other end of the shift capacitor C3 is connected with the fire wire B.
The other end of the light emitting diode F1 and the other end of the resistor R8 are simultaneously connected to one end of the resistor R7.
The resistor R4 is connected with the resistor R7 in series, and the other end of the resistor R4 passes through the transformer H4 and is connected with the live wire C.
When the phase sequence is out of line, the voltages at the resistor R10 and the resistor R9 are increased, the light emitting diode F1 will have current to pass, the light emitting diode F1 will be turned on (the warning light is turned on), meanwhile, the voltages through the resistor R8, the resistor R7 and the resistor R4 will also be increased, the transformer H4 starts to work, and the transformer H4 will transmit an accident signal to the transformer H3 in the execution circuit.
2. Phase-failure protection circuit
Referring to fig. 1, the open-phase protection circuit is also connected in parallel with the main air switch incoming line, and is composed of a resistor R5, a resistor R6, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a rectifier diode D4, a zener diode E2, a light emitting diode F2, a test button T and a transformer H2.
One end of the resistor R14, the resistor R13 and the resistor R12 are respectively connected with the fire wire A, the fire wire B and the fire wire C, the other end of the resistor R14, the resistor R13 and the resistor R12 are simultaneously connected with one end of the resistor R5, and the resistor R6 is connected with the resistor R5 in series.
The rectifying diode D4 is connected with the light emitting diode F2 in series, the voltage stabilizing diode E2 is connected with the light emitting diode F2 in parallel, and the other end of the rectifying diode D4 is connected with a junction of the resistor R5 and the resistor R6.
The resistor R11 is connected with the test button T in series, and the other end of the resistor R11 is connected with the fire wire C.
The other end of the resistor R6, the other end of the light-emitting diode F2 and the other end of the test button T are connected together, and a connecting wire passes through the transformer H2 and is connected with the zero line N.
In the open-phase protection circuit:
(1) The rectifier diode D4 is used to convert the alternating current passing through the resistor R5 into direct current;
(2) The zener diode E2 is mainly used for protecting the light emitting diode F2, sharing the voltage across the light emitting diode, and preventing the light emitting diode F2 from being burned out due to too high voltage in an accident.
When any open phase occurs, the voltages at the resistor R6 and the resistor R11 will increase, the voltage at the resistor R5 will also increase, at this time, the rectifier diode D4 will have current passing, the light emitting diode F2 will also have current passing, the light emitting diode F2 will be turned on (the warning light is turned on), at the same time, the transformer H2 starts to operate, and the transformer H2 will transmit the accident signal to the transformer H3 in the execution circuit.
3. Execution circuit
Referring to fig. 1, the execution circuit is connected in parallel with the main air switch outgoing line, and is composed of a resistor R1, a resistor R2, a shift capacitor C1, a shift capacitor C2, a rectifier diode D1, a rectifier diode D2, a rectifier diode D3, a zener diode E1, a silicon controlled rectifier ScR, a relay B1, a relay B2, and a transformer H3.
One end of the rectifying diode D3, one end of the rectifying diode D2 and one end of the rectifying diode D1 are respectively connected with the fire wire A, the fire wire B and the fire wire C, and the other ends of the rectifying diode D3, the rectifying diode D2 and the rectifying diode D1 are simultaneously connected with one end of the resistor R2.
The zener diode E1, the shift capacitor C2, and the relay B2 are connected in parallel, and the parallel circuit is connected in series with the resistor R2, and the silicon controlled rectifier ScR is connected in series with the parallel circuit.
The resistor R1 is connected in parallel with the shift capacitor C1 after passing through the transformer H3, the parallel circuit is connected in series with the silicon controlled rectifier ScR, and the other end of the parallel circuit is connected with the zero line N.
One end of the relay B1 is connected with a junction of the rectifying diode D1, the rectifying diode D2 and the rectifying diode D3, the other end of the relay B2 is connected with the zero line N, and the normally open contact of the relay B2 is arranged on a connecting line of the relay B1 and the zero line N.
In this implementation, the zener diode E1 is mainly used to protect the relay B2.
When an accident occurs, the voltage at the position of the silicon controlled rectifier ScR can be increased, the direct on-resistance R1 and the transformer H3 start to work, the transformer H3 controls the normally open contact of the relay B2 to be closed, and the relay B1 trips, so that protection is realized.
4. Artificial electric shock protection circuit
Referring to fig. 1, the artificial electric shock protection circuit is composed of a resistor R3 and four transformers H1.
The four mutual inductors H1 are respectively arranged on four wires of the execution circuit, wherein the four wires are connected with the fire wire A, the fire wire B, the fire wire C and the zero wire N.
One end of the resistor R3 is connected to the electric wire connected with the zero line N of the execution circuit, and the other end is connected with the equipment protection zero line.
The four wires of the executive circuit are led out to output one before passing through the four transformers H1 of the artificial electric shock protection circuit.
The input end of the main empty switch is input, and the output end is output two.
The fire wire (any one of the fire wire A, the fire wire B and the fire wire C can be contacted with the ground through a human body and then returns to the zero line N to form a complete loop.
When an artificial electric shock, equipment leakage, line leakage or ground wire is electrified, the voltage at the resistor R3 can suddenly increase, the transformer H1 starts to work at the moment, and the transformer H1 can transmit an accident signal to the transformer H3 in the execution circuit.
A second part: principle of operation
1. Man-made electric shock, equipment leakage, line leakage and grounding wire electrifying
When the artificial electric shock, equipment electric leakage, line electric leakage or grounding wire are electrified, the voltage at the resistor R3 can suddenly increase, the transformer H1 starts to work at the moment, the transformer H1 transmits an accident signal to the transformer H3 in the execution circuit, the transformer H3 controls the normally open contact of the relay B2 to be closed, and the relay B1 trips, so that protection is realized.
2. Phase loss
When any open phase occurs, the voltage at the resistor R6 and the resistor R11 can be increased, the voltage at the resistor R5 can be increased, at the moment, the rectifier diode D4 can pass current, the light-emitting diode F2 can also pass current, the light-emitting diode F2 is lighted (the warning light is lighted), meanwhile, the transformer H2 starts to work, the transformer H2 transmits an accident signal to the transformer H3 in the executing circuit, the transformer H3 controls the normally open contact of the relay B2 to be closed, and the relay B1 trips, so that protection is realized.
Before the device is powered on, it is necessary to test whether the device is able to function properly. After the three-phase four-wire omnibearing multifunctional accident electric control protection switch is installed, in the process of power connection, if the test button T trips, the device can work normally, and if the test button T does not trip, the device cannot work normally.
3. Phase sequence dislocation line
When the phase sequence is wrong, the ultrahigh voltage phenomenon can occur immediately on the circuit, the voltage at the positions of the resistor R10 and the resistor R9 can be increased, the light-emitting diode F1 can pass current, the light-emitting diode F1 is lighted (the warning light is lighted), meanwhile, the voltage at the positions of the resistor R8, the resistor R7 and the resistor R4 can be increased, the transformer H4 starts to work, the transformer H4 transmits an accident signal to the transformer H3 in the execution circuit, the transformer H3 controls the normally open contact of the relay B2 to be closed, and the relay B1 trips, so that protection is realized.
Therefore, the three-phase four-wire omnibearing multifunctional accident electric control protection switch can comprehensively protect various faults generated in a three-phase circuit, has the advantages of multifunction, omnibearing, multipurpose, stable operation and the like, solves the problem of overhigh voltage protection caused by overload and short circuit of circuit voltage, realizes electric control protection on accidents such as artificial electric shock, equipment leakage, circuit leakage, grounding wire electrifying and the like, overcomes the defects and the defects of the existing accident electric control protection switch in the current market, can timely cut off power within 1 second, ensures personnel safety, ensures equipment and circuit safety, and greatly improves the safety coefficient of electric appliance circuits and equipment.
Third section: features/advantages
1. Multifunctional device
The protection fault content is more, and the three-phase line can be effectively controlled.
For the three-phase power line, when the problems of human body electric shock, equipment electric leakage, line electric leakage, ground wire electrifying, phase sequence misplacement and phase failure occur, the three-phase power line can be timely protected.
2. Omnibearing all-round
At present, the existing accident control protection systems in the market are all single overcurrent protection, and part of products have electric shock protection functions, and the power supply is solved by a transformer voltage transformation scheme. In motor operation accidents, three-phase four-wire has different accident manifestations, such as: the fault of any two phases is very common, and in maintenance, fault line connection, ABC three phase connection dislocation, A phase change B phase, B phase change C phase, live wire and ground wire and the like can all occur, so that the power supply of an accident electric control system is ensured by a transformer alone to be a big problem.
In addition, no matter what change happens to the three-phase four-wire, the three-phase four-wire omnibearing multifunctional accident electric control protection switch can work normally as long as one phase has electricity.
3. Multipurpose use
The three-phase four-wire omnibearing multifunctional accident electric control protection switch can be used for both a power supply main switch and each switch of a distribution panel main switch terminal, and has more comprehensive functions and wider application.
4. Stable operation
The three-phase four-wire omnibearing multifunctional accident electric control protection switch of the invention has the advantages that the power supply and each phase line are in parallel connection, only one line is electrified, even if 220V is changed into 380V, the three-phase four-wire omnibearing multifunctional accident electric control protection switch can work normally, and the stability and the reliability are very good.
It should be noted that, the above embodiments are not intended to limit the present invention in any way, and all the technical solutions obtained by adopting equivalent substitution or equivalent transformation fall within the protection scope of the present invention.
Claims (1)
1. The utility model provides a multi-functional accident automatically controlled protection switch of three-phase four-wire all-round which characterized in that includes: a phase sequence protection circuit, a phase-lack protection circuit, a man-made electric shock protection circuit and an execution circuit, wherein,
The phase sequence protection circuit is connected with a main air switch incoming line in parallel and comprises a resistor R4, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a shift capacitor C3, a light emitting diode F1 and a transformer H4, wherein the resistor R10 is connected with the resistor R9 in series, the other end of the resistor R10 is connected with a live wire A, the other end of the resistor R9 is simultaneously connected with the shift capacitor C3, the light emitting diode F1 and one end of the resistor R8, the other end of the shift capacitor C3 is connected with a live wire B, the other end of the light emitting diode F1 and the other end of the resistor R8 are simultaneously connected with one end of the resistor R7, the resistor R4 is connected with the resistor R7 in series, and the other end of the resistor R4 passes through the transformer H4 to be connected with the live wire C;
The open-phase protection circuit is also connected with a main air switch inlet in parallel, and consists of a resistor R5, a resistor R6, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a rectifier diode D4, a voltage stabilizing diode E2, a light emitting diode F2, a test button T and a transformer H2, wherein one end of the resistor R14, the resistor R13 and one end of the resistor R12 are respectively connected with a fire wire A, a fire wire B and a fire wire C, the other end of the resistor R14, the resistor R13 and the other end of the resistor R12 are simultaneously connected with one end of the resistor R5, the resistor R6 is connected with the resistor R5 in series, the rectifier diode D4 is connected with the light emitting diode F2 in series, the voltage stabilizing diode E2 is connected with the light emitting diode F2 in parallel, the other end of the rectifier diode D4 is connected with a junction of the resistor R5 and the resistor R6, the resistor R11 is connected with the test button T in series, the other end of the resistor R11 is connected with the fire wire C, the other end of the resistor R6, the other end of the light emitting diode F2 and the other end of the test button T are connected with the zero line N through the transformer H2;
In the open-phase protection circuit:
1) The rectifier diode D4 is used to convert the alternating current passing through the resistor R5 into direct current;
2) The voltage stabilizing diode E2 is used for protecting the light emitting diode F2, sharing the voltage at two ends of the light emitting diode, and preventing the light emitting diode F2 from being burnt due to overhigh voltage in an accident;
the execution circuit is connected with a main air switch outgoing line in parallel, and consists of a resistor R1, a resistor R2, a shift capacitor C1, a shift capacitor C2, a rectifier diode D1, a rectifier diode D2, a rectifier diode D3, a voltage regulator diode E1, a silicon controlled rectifier ScR, a relay B1, a relay B2 and a transformer H3, wherein one ends of the rectifier diode D3, the rectifier diode D2 and the rectifier diode D1 are respectively connected with a live wire A, a live wire B and a live wire C, the other ends of the rectifier diode D3, the rectifier diode D2 and the rectifier diode D1 are simultaneously connected with one end of the resistor R2, the voltage regulator diode E1, the shift capacitor C2 and the relay B2 are connected in parallel, the parallel circuit is connected with the resistor R2 in series, and the silicon controlled rectifier ScR is also connected with the parallel circuit in series; the resistor R1 passes through the transformer H3 and then is connected with the shift capacitor C1 in parallel, the parallel circuit is connected with the silicon controlled rectifier ScR in series, and the other end of the parallel circuit is connected with the zero line N; one end of the relay B1 is connected with a junction of the rectifying diode D1, the rectifying diode D2 and the rectifying diode D3, the other end of the relay B2 is connected with the zero line N, and a normally open contact of the relay B2 is arranged on a connecting line of the relay B1 and the zero line N;
the artificial electric shock protection circuit consists of a resistor R3 and four transformers H1, wherein the four transformers H1 are respectively arranged on four wires of the execution circuit, which are connected with a live wire A, a live wire B, a live wire C and a zero wire N, one end of the resistor R3 is connected with the wire of the execution circuit, which is connected with the zero wire N, the other end of the resistor R3 is connected with the equipment protection zero wire, and the four wires of the execution circuit are led out to output one before passing through the four transformers H1 of the artificial electric shock protection circuit;
the input end of the main empty switch is input, and the output end is output two;
When an artificial electric shock, equipment leakage, line leakage or ground wire is electrified, the voltage at the resistor R3 is suddenly increased, the transformer H1 starts to work at the moment, the transformer H1 transmits an accident signal to the transformer H3 in the execution circuit, the transformer H3 controls the normally open contact of the relay B2 to be closed, and the relay B1 trips, so that protection is realized;
When any open phase occurs, the voltages at the resistor R6 and the resistor R11 are increased, the voltage at the resistor R5 is also increased, at the moment, the rectifier diode D4 is provided with current, the light-emitting diode F2 is lightened, meanwhile, the transformer H2 starts to work, the transformer H2 transmits an accident signal to the transformer H3 in the execution circuit, the transformer H3 controls the normally open contact of the relay B2 to be closed, and the relay B1 trips, so that protection is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710990788.9A CN107732862B (en) | 2017-10-20 | 2017-10-20 | Three-phase four-wire omnibearing multifunctional accident electric control protection switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710990788.9A CN107732862B (en) | 2017-10-20 | 2017-10-20 | Three-phase four-wire omnibearing multifunctional accident electric control protection switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107732862A CN107732862A (en) | 2018-02-23 |
| CN107732862B true CN107732862B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710990788.9A Active CN107732862B (en) | 2017-10-20 | 2017-10-20 | Three-phase four-wire omnibearing multifunctional accident electric control protection switch |
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| CN107732862A (en) | 2018-02-23 |
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