WO2012062045A1

WO2012062045A1 - Breaker for preventing voltage loss of null line

Info

Publication number: WO2012062045A1
Application number: PCT/CN2011/001903
Authority: WO
Inventors: 万家盛
Original assignee: 湖北盛佳电器设备有限公司
Priority date: 2010-11-10
Filing date: 2011-11-14
Publication date: 2012-05-18
Also published as: CN102035171A; CN102035171B

Abstract

A breaker (1) for preventing voltage loss of a null line comprises a breaker main body (12). The breaker main body (12) includes: a detection unit (11), for detecting an ON/OFF state of a null line (N) and outputting a detection signal; a first voltage storage unit (13), for obtaining a voltage from a live line (L), and having a first high-level output end; a second voltage storage unit (16), for obtaining a voltage from the live line (L), and having a second high-level output end; a retaining-type execution unit (14), for receiving a positive or negative voltage and generating an action of turning on or off the breaker main body (12), and retaining a state before the voltage direction changes; and a selection unit (15), for selecting a positive power supply from the first high-level output end to the retaining-type execution unit (14) or a negative power supply from the second high-level output end to the retaining-type execution unit (14).

Description

Circuit breaker to prevent zero line loss of voltage

Technical field

The invention relates to an anti-tampering product, in particular to a circuit breaker used in a prepaid system to prevent artificially cutting the neutral line and causing a zero line loss of pressure. Background technique

For the power sector, the switch disconnection device is an indispensable device for ensuring safe use of electricity and circuit switching. It can be applied to high voltage or low voltage operation. It can be set on single-phase power line or three-phase. On the power line, we refer to the existing circuit breaker as the circuit breaker body, which has at least an open circuit function and a function of receiving an external control signal through an external control line.

Among them, for the neutral line, it is often the power supply to the control circuit of the circuit breaker body. Once the neutral line is cut, the control circuit loses the power supply, and the circuit breaker has difficulty in addition to the basic function of the basic disconnect function. .

In addition, as the requirements of intelligent power grids become more and more open, such as the application of prepaid systems, the demand for such circuit breakers is increasing: When the external control lines of the circuit breakers are broken, the users are often not affected. The use of electricity, but it brings problems to the electricity management department, especially when some users install the prepaid fee, deliberately will external control line or steal the ordinary switch, which greatly affects the normal power order. .

Especially in the case of power failure, if the neutral wire or the external control wire is cut, the existing circuit breaker is even more unresponsive.

In view of the above defects, the invention content

It is an object of the present invention to provide a circuit breaker that prevents zero line voltage loss to overcome the above technical deficiencies. In order to achieve the above object, the technical solution adopted by the present invention is to provide a circuit breaker for preventing a loss of neutral line, comprising: a circuit breaker body, comprising:

a detecting unit, configured to detect a neutral line on-off state and output a detection signal;

a first accumulator unit, which obtains a voltage from the phase line and has a first high potential output terminal; a second accumulator unit that obtains a voltage from the phase line and has a second high potential output terminal; a hold type execution unit that receives an action of closing or opening the circuit breaker body by receiving a forward or reverse voltage, and maintaining the state before the voltage direction changes; And a selection unit configured to select a forward power supply from the first high potential output terminal to the hold type execution unit or a reverse power supply to the hold type execution unit from the second high potential output terminal.

The detecting unit is a zero line voltage detecting circuit, and includes:

a first ground point and a first analog ground point are disposed on the neutral line;

a rectifying, filtering, and voltage stabilizing subcircuit that obtains a voltage signal from the phase line;

a first resistor having a first end set to a second ground point and a second end coupled to the rectifying, filtering and voltage stabilizing subcircuit output and the second analog ground point.

The first voltage storage unit includes: a first diode and a first capacitor connected in series, the first diode and the output end of the rectifying, filtering, and voltage stabilizing circuit Connected, one end of the first capacitor is the first high potential output end, and the other end is grounded.

The second voltage accumulating unit comprises: a second diode and a second capacitor connected in series, the second diode and the rectifying, filtering and voltage stabilizing circuit output end Connected, one end of the second capacitor is the second high potential output end, and the other end is grounded. Retentive release or motor.

The selection unit includes:

a switch control device that receives the detection signal of the detecting unit;

a switching action device for switching the forward end of the holding type execution unit between the first high potential output end of the first pressure accumulating unit and the ground point, and performing the hold type The opposite end of the unit switches between a ground point and a second high potential output of said second accumulator unit.

Preferably, the switch control device is a first triode or a micro-relay, and the control end of the switch controller is connected to the second end of the first resistor.

Preferably, the method further includes: a third energy storage unit, comprising: a third diode and a third capacitor connected in series, the third diode and the rectifying, filtering and voltage regulator The output ends of the circuit are connected, and one end of the third capacitor is the third high potential output end, and the other end is grounded.

Wherein, the switching action device is a relay, one end of which is connected to the third high potential output end, and the other end of which is connected to the switch control device.

Preferably, the method further includes: a fourth energy storage unit, comprising: a fourth capacitor, one end of which is grounded, and the other end of which is connected to the output of the rectifying, filtering and voltage stabilizing subcircuit.

Preferably, the method further includes: an external control unit, comprising: a trigger device that acquires an external control signal, Thereby, a trigger signal is output, and the output end of the trigger signal is connected to the control end of the switch control device.

Preferably, the triggering device is a second transistor, the base thereof receives the control signal, and the collector is respectively connected to the output of the rectifying, filtering and voltage regulating sub-circuit and the switch control device. The control terminals are connected and their emitters are grounded.

Compared with the prior art, the present invention has an advantageous effect in that the circuit breaker can be effectively disconnected when the neutral line is depressurized and the external control line is cut. DRAWINGS

1 is a functional block diagram of a circuit breaker for preventing zero line voltage loss according to the present invention;

2 is a cross-sectional view of a circuit breaker for preventing a neutral line from being depressurized according to the present invention;

3 is a circuit diagram of a circuit breaker for preventing a zero line voltage loss according to the present invention;

FIG. 4 is a circuit diagram 2 of the circuit breaker for preventing zero line voltage loss according to the present invention. detailed description

The above and other technical features and advantages of the invention will be described in more detail below with reference to the accompanying drawings.

Please refer to FIG. 1 , which is a functional block diagram of a circuit breaker for preventing zero line voltage loss according to the present invention; the circuit breaker 1 for preventing zero line voltage loss, comprising: a circuit breaker body 12, in the circuit breaker The body 12 includes: a detecting unit 11 for detecting a neutral line on-off state and outputting a detection signal; a first accumulating unit 13 for obtaining a voltage from the phase line L and having a first high potential output a second accumulator unit 16 that obtains a voltage from the phase line L and has a second high potential output; a hold-type actuator unit 14 that receives a forward or reverse voltage to generate a closure or Is to disconnect the operation of the circuit breaker body 12 and maintain the state before the voltage direction changes; a selection unit 15 that receives the detection signal and is configured to select the first high potential output terminal to The hold-type execution unit 14 supplies power to the hold-type execution unit 14 in a forward direction or a second high-potential output.

Referring to FIG. 2, it is a cross-sectional view of a circuit breaker for preventing zero line voltage loss according to the present invention; wherein the detecting unit 11, the first accumulating unit 13, the second accumulating unit 16, and the selecting unit 15 are open circuit. The control function portion of the device is disposed on the circuit board 121 in the circuit breaker body 12, and the holding type execution unit 14 has a forward end and an inverting end that determine the action direction according to the current flow direction, which is magnetically held. Sex release or motor. Should be a function of extending or retracting the magnetic retention type trip unit in a more electric direction, and the motor The utility model has the characteristics of realizing the forward and reverse according to the current flow direction, and the magnetic retention release is used for the embodiment.

14. The operation output end is adjacent to the operation mechanism 122 in the circuit breaker body 12, and the operation mechanism 122 is operated by the operation of the retention type execution unit 14 to further operate the circuit breaker. The body 12 generates an open circuit or a closing action.

Referring to FIG. 3, which is a circuit diagram of a circuit breaker for preventing a zero line voltage loss according to the present invention, the detecting unit is a zero line voltage detecting circuit, and the method includes: setting a first grounding point on the neutral line A and a first analog ground point B; a rectifying, filtering, and voltage stabilizing subcircuit that obtains a voltage signal from the phase line; a first resistor R6 having a first end set to a second ground point, The two ends are connected to the output of the rectifying, filtering and voltage stabilizing subcircuit and the second analog grounding point.

The first voltage accumulating unit comprises: a first diode D3 and a first capacitor C5 connected in series, the first diode D3 and the rectifying, filtering and voltage regulating sub-circuit output end Connected, the first capacitor C5- terminal is the first high-potential output terminal, and the other end thereof is grounded.

The second voltage accumulating unit comprises: a second diode D4 and a second capacitor C6 connected in series, the second diode D4 and the rectification, filtering and voltage regulator sub-circuit output The terminal is connected, the second capacitor C6-end is the second high-potential output terminal, and the other end is grounded.

The selection unit includes: a switch control device that receives the detection signal of the detection unit; and a switch action device for using the forward end of the hold type execution unit in the first pressure storage unit Switching between the first high potential output terminal and the grounding point, and switching the opposite end of the holding type execution unit between the grounding point and the second high potential output end of the second pressure accumulating unit, where The holding type execution unit is a magnetically held release L1, and a motor can also be used.

The switch control device is a first transistor Q2 or a micro-relay, and the control end of the switch controller is connected to the second end of the first resistor R6 through a diode D6, which is selected in this embodiment. It is a first transistor Q2, and the control terminal is a base of the first transistor Q2.

The method further includes: a third energy storage unit, comprising: a third diode D5 and a third capacitor C7 connected in series, the third diode D5 and the rectification, filtering and voltage regulation The output terminals of the sub-circuits are connected, the third capacitor C7- terminal is the third high-potential output terminal, and the other end thereof is grounded.

The switching action device is a relay J1 having one end connected to the third high potential output end and the other end connected to the first transistor Q2.

The method further includes: a fourth energy storage unit, comprising: a fourth capacitor C4, one end of which is grounded, and the other end of which is connected to the output of the rectifying, filtering and voltage stabilizing subcircuit. The method further includes: an external control unit, comprising: a trigger device, which acquires an external control signal, thereby outputting a trigger signal, and an output end of the trigger signal is connected to a base of the first transistor Q2. The triggering device is a second transistor Q1, the base thereof receives the control signal, and the collector thereof is respectively connected to the output of the rectifying, filtering and voltage regulator sub-circuit and the first transistor Q2 The base is connected and its emitter is grounded.

Referring to FIG. 4, it is a circuit diagram implementation of the circuit breaker for preventing zero line voltage loss according to the present invention. The difference from the first embodiment is that the present embodiment is directed to a three-phase line, and the power supply of the control portion is through the diode. D12-D14, rectification processing from three phase lines a, b, c respectively, but it is the same as the working principle of the part and the first embodiment.

The working process is as follows: Point B is the analog grounding, connecting between AB, the potentials of C and D are the same; when A and B are disconnected, the potential of point C is higher than the potential of point D, at this time the first three The pole tube Q2 is turned on, at this time, the third capacitor C7 in the third accumulator unit and the relay J1 form a closed loop, and the magnetic retention type trip unit L1 generates an action; The high potential end of the second capacitor C6 in the pressing unit forms a closed loop with the magnetic holding type release L1, and generates a tripping action, thereby causing the circuit breaker to be disconnected and in this state;

When A and B are connected, the potentials of the two points (:, D are the same, at this time, the first transistor Q2 is not turned on, at this time, the third capacitor C7 in the third pressure accumulating unit and the relay Jl forms an open circuit, and the relay j1 is reset; at this time, the high potential end of the first capacitor C5 in the first pressure accumulating unit forms a closed loop with the magnetic holding type release L1, and the magnetic retention type trip unit L1 generates an action to further close the circuit breaker; at this time, the first capacitor C5, the second capacitor C6, and the third capacitor C7 are charged;

For the external control unit, the Kz terminal obtains an external control signal, and when the external control signal is high, the second transistor Q1 is turned on, so that the base of the first transistor Q2 is low. And as of;

The above description is intended to be illustrative, and not restrictive, and many modifications and changes may be made without departing from the spirit and scope of the invention. Or equivalent, but all fall within the scope of the present invention.

Claims

Claim

A circuit breaker for preventing a loss of neutral line, comprising: a circuit breaker body, characterized in that:

a first accumulator unit that obtains a voltage from the phase line and has a first high potential output terminal; a second accumulator unit that obtains a voltage from the phase line and has a second high potential output terminal; a hold type execution unit that receives an action of closing or opening the circuit breaker body by receiving a forward or reverse voltage, and maintaining the state before the voltage direction changes;

And a selection unit configured to select a forward power supply from the first high potential output terminal to the hold type execution unit or a reverse power supply to the hold type execution unit from the second high potential output terminal.

2. The circuit breaker for preventing zero line voltage loss according to claim 1, wherein the detecting unit is a neutral voltage detecting circuit, and the method comprises:

a rectifying, filtering, and voltage stabilizing subcircuit that obtains a voltage signal from the phase line; a first resistor having a first end set to a second ground point, a second end thereof, and the rectifying, filtering, and The output of the voltage regulator subcircuit is connected to the second analog ground point.

3. The circuit breaker for preventing zero line voltage loss according to claim 2, wherein the first pressure accumulating unit comprises: a first diode and a first capacitor connected in series thereto, The first diode is connected to the output end of the rectifying, filtering and voltage stabilizing subcircuit, and one end of the first capacitor is the first high potential output end, and the other end is grounded.

The circuit breaker for preventing zero line voltage loss according to claim 2, wherein the second pressure accumulating unit comprises: a second diode and a second capacitor connected in series thereto, The second diode is connected to the output of the rectifying, filtering and voltage stabilizing subcircuit, and one end of the second capacitor is the second high potential output end, and the other end is grounded.

The circuit breaker for preventing zero line voltage loss according to claim 1 or 2, wherein the holding type execution unit has a positive end and an opposite end that determine a moving direction, which is magnetically retained Button or motor.

6. The circuit breaker for preventing zero line voltage loss according to claim 5, wherein the selecting unit comprises: a switching control device that receives the detection signal of the detecting unit; a switching action device for using the forward end of the holding type execution unit at the first high potential output end of the first pressure accumulating unit Switching with the grounding point while switching the opposite end of the holding type actuator unit between the grounding point and the second high potential output end of the second pressure accumulating unit.

The circuit breaker for preventing zero line voltage loss according to claim 6, wherein the switch control device is a first triode or a micro relay, and the control end of the switch controller is The second ends of the first resistors are connected.

8. The circuit breaker for preventing zero line voltage loss according to claim 7, further comprising: a third energy storage unit, comprising: a third diode and a third capacitor connected in series therewith The third diode is connected to the output end of the rectifying, filtering and voltage stabilizing sub-circuit, and one end of the third capacitor is the third high potential output end, and the other end is grounded.

9. The circuit breaker for preventing zero line voltage loss according to claim 8, wherein the switching action device is a relay, one end of which is connected to the third high potential output end, and the other end thereof. Connected to the switch control device as described.

10. The circuit breaker for preventing zero line voltage loss according to claim 2, further comprising: a fourth energy storage unit, comprising: a fourth capacitor, one end of which is grounded, the other end of which is The rectifier, filter and voltage regulator subcircuits are connected at the output.

11. The circuit breaker for preventing zero line voltage loss according to claim 9, further comprising: an external control unit, comprising: a triggering device that acquires an external control signal, thereby outputting a trigger signal, The output of the trigger signal is coupled to the control terminal of the switch control device.

12 . The circuit breaker for preventing zero line voltage loss according to claim 11 , wherein the triggering device is a second triode, the base thereof receives the control signal, and the collectors thereof are respectively The rectifying, filtering and voltage stabilizing sub-circuit output terminals and the control end of the switching control device are connected, and the emitter thereof is grounded.