CN102543598A - Circuit breaker - Google Patents

Abstract

The present invention provides a circuit breaker that can easily determine whether the circuit breaker is opened by an operation confirmation tripping device that operates using a signal from the outside or by the original circuit protection function of the circuit breaker. Open way. The circuit breaker related to the present invention has: an opening and closing contact, which opens and closes the circuit; an overcurrent tripping device, which makes the closed state Opening and closing contact tripping: a tripping device for operation confirmation, which is driven based on an external signal, and sets the opening and closing contacts in a closed state to an open state regardless of the tripping by the overcurrent tripping device and an operation display unit that displays that the trip device for operation confirmation is driven.

Description

circuit breaker

technical field

The present invention relates to a circuit breaker that protects a circuit by opening a circuit in response to overcurrent or leakage, and particularly relates to a circuit breaker with an operation display function.

Background technique

Currently, as a circuit breaker installed for circuit protection, there is a circuit breaker provided with a tripping device capable of opening the circuit breaker by an external signal (for example, refer to Patent Document 1). In addition, there is currently a leakage test device for confirming a leakage test of an earth leakage circuit breaker by operating a remote test switch (for example, refer to Patent Document 2).

Patent Document 1: Japanese Unexamined Patent Publication No. 2006-92782

Patent Document 2: Japanese Patent Application Laid-Open No. 8-106844

Contents of the invention

In the conventional circuit breaker shown in Patent Document 1, when the circuit breaker is in an open state and the tripping device is operated based on a signal from the outside to confirm the operation of the circuit breaker, it cannot be easily determined It can be determined whether the circuit breaker was opened by the tripping device or by the original circuit protection function of the circuit breaker due to the detection of overload current, short-circuit current, leakage current, etc. Also in the earth leakage circuit breaker disclosed in Patent Document 2, there is a problem that, when the operation of the earth leakage circuit breaker is checked using the remote test switch, it cannot be easily determined that the remote test switch is used. The open circuit is still opened by using the original circuit protection function of the leakage circuit breaker due to the detection of leakage current.

The present invention is made to solve the above-mentioned problems in the conventional circuit breaker, and its object is to obtain a circuit breaker that can easily determine whether it is an operation confirmation trip that operates by using a signal from the outside. The circuit breaker is opened by the device, or the original circuit protection function of the circuit breaker is used to open the circuit.

The circuit breaker according to the present invention is characterized in that it has: an opening and closing contact, which opens and closes the circuit; The opening and closing contacts in the closed state are tripped; the tripping device for operation confirmation is driven based on an external signal, and the opening and closing contacts in the closed state are set regardless of the tripping by the overcurrent tripping device. is an off state; and an operation display unit that displays that the trip device for operation confirmation is driven.

In addition, the circuit breaker according to the present invention is characterized in that it includes: an opening and closing contact for opening and closing a circuit; Opening and closing contact tripping: a tripping device for operation confirmation, which is driven based on an external signal, and sets the opening and closing contacts in the closed state to the open state regardless of the tripping by the leakage tripping device; And an operation display unit that displays that the trip device for operation confirmation is driven.

The effect of the invention

According to the circuit breaker according to the present invention, since it has the trip device for operation confirmation, which is driven based on an external signal, the open and close contacts in the closed state are set to The disconnected state; and the operation display part, which displays the fact that the operation confirmation tripping device is driven, so it can be easily judged that the circuit breaker is operated by the operation confirmation tripping device using a signal from the outside. The open circuit is still open through the original circuit protection function of the circuit breaker.

In addition, according to the circuit breaker according to the present invention, since the trip device for operation confirmation is driven based on an external signal, the open and close contacts in the closed state are set regardless of the tripping by the leakage trip device. is an off state; and an operation display part, which displays the fact that the operation confirmation tripping device is driven, so it can be easily judged that the circuit breaker is driven by the operation confirmation tripping device using a signal from the outside. The open circuit is performed by the original circuit protection function of the circuit breaker.

Description of drawings

FIG. 1 is a perspective view showing a circuit breaker according to Embodiment 1 of the present invention.

2 is a circuit diagram of a trip device in the circuit breaker according to Embodiment 1 of the present invention.

3 is a perspective view showing a circuit breaker according to Embodiment 2 of the present invention.

4 is a perspective view showing a circuit breaker according to Embodiment 3 of the present invention.

5 is a perspective view showing a circuit breaker according to Embodiment 4 of the present invention.

6 is a circuit diagram of a circuit breaker and its leakage test device according to Embodiment 4 of the present invention.

Detailed ways

Implementation mode 1.

Next, the circuit breaker according to Embodiment 1 of the present invention will be described. FIG. 1 is a perspective view of a circuit breaker 1 according to Embodiment 1 of the present invention. In FIG. 1 , a circuit breaker 1 has a tripping device (hereinafter simply referred to as a tripping device) 2 for operation confirmation, which is mounted on a frame composed of a base 101 and a cover 102 of the circuit breaker 1. 100 on the outer side. The circuit breaker 1 shown here is a circuit breaker for three phases connected to a three-phase circuit, but it may be a circuit breaker other than this.

Although not shown in the figure, the circuit breaker 1 has internally: an opening and closing contact, which is composed of a fixed contact and a movable contact, and opens and closes the circuit; Operation, thereby opening and closing the opening and closing contacts; and an overcurrent tripping device, which releases the opening and closing contacts in the closed state to become an open state when an overcurrent greater than or equal to a specified value flows in the circuit.

The trip device 2 has a circuit described later inside. For example, by closing a trip switch (switch) 8 provided at a distance from the circuit breaker 1, the shunt coil (shunt coil) of the circuit breaker 1 can be energized, so that The trip mechanism operates to disconnect the circuit.

The trip device 2 has three input terminals 3 , 4 , and 5 and an operation display lamp 6 composed of a light emitting diode (diode). An AC power source 7 serving as a control power source for operating the trip device 2 has one end connected to the input terminal 5 of the trip device 2 and the other end connected to the input terminal 4 of the trip device 2 . In addition, the other end of the AC power supply 7 is connected to the input terminal 3 of the trip device 2 via the trip switch 8 .

2 is a circuit diagram of a trip device in the circuit breaker according to Embodiment 1 of the present invention. In FIG. 2 , an input-side terminal of a first power conversion circuit 201 constituted by a converter is connected to input terminals 4 and 5 of a trip device 2 via resistors. Similarly, the input-side terminal of the second power conversion circuit 202 constituted by a converter is connected to the input terminals 3 and 4 of the trip device 2 via resistors. The first power conversion circuit 201 and the second power conversion circuit 202 convert AC power from the AC power supply 7 into DC power, respectively, and output them from output-side terminals via constant voltage elements 203 and 204 , respectively.

An operation display lamp 6 serving as an operation display unit is connected between output terminals of the first power conversion circuit 201 via a first thyristor 55 . The gate of the first thyristor 55 is connected to the collector of the first transistor (transistor) 205 via a resistor. The emitter of the first transistor 205 is connected to the positive side terminal of the first power conversion circuit 201 through the second transistor 206 , and the collector is connected to the negative side terminal of the first power conversion circuit 201 through a resistor and grounded. A base (base) of the first transistor 205 is connected to an output terminal of a photo-coupler (photo-coupler) 51 via a resistor.

A capacitor (condenser) 207 is connected between the output terminals of the first power conversion circuit 201 via the second transistor 206 , and is charged to a predetermined voltage by the output of the first power conversion circuit 201 . The reset switch 43 is connected to the base of the second transistor 206 and turns off the second transistor 206 by closing it. The input terminal of the photocoupler 51 is connected between the output terminals of the second power conversion circuit 202 via the third transistor 208 . The second thyristor 56 is connected in series to the shunt coil 103 for tripping the circuit breaker 1 .

In the circuit breaker according to the present invention constituted as described above, when the circuit breaker 1 is in the on state, the movable contact contacts the fixed contact to close the circuit to be protected. At this time, the AC power from the AC power source 7 is converted into DC power by the first power conversion circuit 201 and supplied to the capacitor 207 via the second transistor 206, and the capacitor 207 is charged to a predetermined voltage. The second transistor 206 is turned off when the capacitor 207 is charged to a predetermined voltage.

On the other hand, since the trip switch 8 connected to the trip device 2 is off, the second power conversion circuit 202 does not operate, and direct current is not output between its output terminals. Thus, the photocoupler 51 does not operate, and the second thyristor 56 is not applied with a gate signal because the photocoupler 51 is off (off), and is non-conductive, and the shunt coil 103 of the circuit breaker 1 is in the off state. power-on state.

And, since the photocoupler 51 does not operate, the first transistor 205 is turned off, the first thyristor 55 is not supplied with a gate signal, and is in a non-conductive state, and the operation display lamp 6 composed of a light-emitting diode is turned off. As a result, it can be recognized that the trip device 2 is not in operation by turning off the operation display lamp 6 . In addition, the fact that the circuit breaker 1 is in the on state can be confirmed by the fact that the operating handle is in the on position.

The circuit breaker 1 can be switched from the on state to the off state or from the off state to the on state by using an operating mechanism not shown in the figure. In addition, when an overcurrent flows in the circuit, an unshown operating mechanism can be used to The tripping mechanism performs a tripping operation to open and protect the circuit. The normal opening and closing operation of the circuit breaker 1 and the tripping operation due to overcurrent are performed independently of the operation of the trip device 2, and the operation display lamp 6 indicating the operation of the trip device 2 remains off. Thus, when the operation display lamp 6 is not lit, if the operating handle of the circuit breaker 1 is at the off position or the trip position, it can be determined that the circuit breaker 1 is in the off state or the trip state by its original function. .

Next, for example, when the trip switch 8 is closed for the purpose of testing the function of the circuit breaker 1 , the AC power supply 7 is connected to the second power conversion circuit 202 . Thus, the second power conversion circuit 202 converts the AC power from the AC power supply 7 into DC power, and outputs the DC power between its output terminals. The third transistor 208 is turned on by receiving the direct current generated between the output terminals of the second power conversion circuit 202, and turns on the photocoupler 51. As a result, the gate signal is applied to the second thyristor 56 and turned on, the shunt coil 103 of the circuit breaker 1 is energized, and the circuit breaker 1 is turned off.

On the other hand, when the photocoupler 51 is turned on, the first transistor 205 is turned on, and the first thyristor 55 is turned on by applying a gate signal via the first transistor. As a result, the operation display lamp 6 is turned on. Accordingly, when the operation indicator lamp 6 is turned on, if the operating handle of the circuit breaker 1 is at the trip position, it can be determined that the circuit breaker 1 has tripped due to the operation of the trip device 2 .

The trip switch 8 is composed of a normally-off self-resetting switch, and after being pressed by an operator to be turned on, the trip switch 8 is automatically turned off when the pressing force disappears. As a result, the output generation period of the second power conversion circuit 202 is relatively short, and the photocoupler 51 is only turned on during this short period, but when the photocoupler 51 is turned on, the gate of the second thyristor 56 is immediately applied to the gate. pole signal, the second thyristor 56 is turned on, and the circuit breaker 1 is tripped.

In addition, by turning on the photocoupler 51, the first thyristor 55 is turned on as described above, and the operation display lamp 6 is turned on. A gate signal is applied to the gate of the thyristor 55 . However, once the first thyristor 55 is turned on, even if the gate signal is not applied, as long as the current flowing through the first thyristor 55 is not zero, it does not become non-conductive. That is, when the first thyristor 55 is turned on by the application of the gate signal, the conduction is self-maintained, and the operation display lamp 6 is continuously lit.

In order to turn off the lighted operation display lamp 6, the reset switch 43 is turned on. That is, when the reset switch (reset switch) 43 is turned on, the second transistor 206 is turned off, and the current flowing through the first thyristor 55 becomes zero. Therefore, the first thyristor 55 becomes non-conductive, and the operation display lamp 6 is turned off.

As described above, according to the circuit breaker according to Embodiment 1 of the present invention, it can be easily determined whether the circuit breaker was opened by the tripping device operated by a signal from the outside or whether the circuit breaker itself was opened. The circuit protection function performs an open circuit.

Implementation mode 2.

Next, a circuit breaker according to Embodiment 2 of the present invention will be described. 3 is a perspective view showing a circuit breaker according to Embodiment 2 of the present invention. In FIG. 3 , a circuit breaker 11 differs from the circuit breaker according to Embodiment 1 in that a trip device (hereinafter, simply referred to as a trip device) 12 for operation confirmation is incorporated. The trip device 12 has input lines 13 , 14 , and 15 respectively connected to its input terminals (not shown), and an operation display lamp 16 as an operation display unit composed of a light emitting diode.

AC power source 17 as a control power source for operating trip device 2 has one end connected to one input terminal of trip device 12 via input line 15 and the other end connected to the other input terminal of trip device 2 via input line 14 . In addition, the other end of the AC power supply 17 is connected to the other input terminal of the trip device 12 via the trip switch 18 and the input line 13 . Other configurations and operations are the same as those of the circuit breaker according to the first embodiment.

As described above, according to the circuit breaker according to Embodiment 2 of the present invention, it can be easily determined whether the circuit breaker was opened by the tripping device operated by an external signal or by the circuit breaker itself. The circuit protection function performs an open circuit.

Furthermore, according to the circuit breaker according to Embodiment 2 of the present invention, since the trip device 12 is incorporated in the circuit breaker 11, the projected area of the circuit breaker does not increase.

Implementation mode 3.

Next, a circuit breaker according to Embodiment 3 of the present invention will be described. FIG. 4 is a perspective view of a circuit breaker according to Embodiment 3. FIG. In FIG. 4 , the circuit breaker 21 differs from the circuit breaker according to Embodiment 1 in that a trip device for operation confirmation (hereinafter, simply referred to as a trip device) 22 is built in. The circuit breakers according to Embodiment 2 differ in that the trip device 22 has a mechanical operation display device 26 as an operation display unit.

The trip device 22 has input lines 23 and 25 respectively connected to its input terminals (not shown), and the above-mentioned mechanical operation display device 26 . This mechanical operation display device 26 is configured such that the display button protrudes when the tripping device 22 operates, and the protruding position is self-maintained until it is manually returned to the original position, for example. A control power supply 27 and a trip switch 28 for operating the trip device 22 are connected in series to the respective input lines 23 and 25 of the trip device 22 .

As described above, according to the circuit breaker according to Embodiment 3 of the present invention, since the trip device 22 has the mechanical operation display device 26 that projects the display button when the trip device 22 operates, the above embodiment is unnecessary. Wiring of the trip device 22 can be simplified by controlling the power supply for self-holding of the operation display lamp necessary for the circuit breaker according to Embodiment 1 and Embodiment 2.

In addition, according to the circuit breaker according to Embodiment 3 of the present invention, it can be easily determined whether the circuit breaker is opened by the tripping device operated by a signal from the outside or whether the original circuit of the circuit breaker is used. The protection function is performed as an open circuit.

Furthermore, according to the circuit breaker according to Embodiment 3 of the present invention, since the trip device 22 is incorporated in the circuit breaker 21, the projected area of the circuit breaker does not increase.

Implementation mode 4.

Next, a circuit breaker according to Embodiment 4 of the present invention will be described. 5 is a perspective view showing a circuit breaker according to Embodiment 4 of the present invention. The circuit breaker according to Embodiment 4 is an earth leakage circuit breaker capable of detecting an electric leakage and interrupting a circuit, but will be simply referred to as a circuit breaker in the following description.

The circuit breaker 31 has a leakage test device 32 mounted on the outer surface of a frame 300 composed of a base 301 and a cover 302 of the circuit breaker 31 . The circuit breaker 31 shown here is a circuit breaker for 3 phases connected to a 3-phase circuit, but it may be a circuit breaker other than this. The leakage test device 32, which is a tripping device for operation confirmation, has a circuit described later inside. A simulated leakage current flows through the middle, so that the tripping mechanism of the circuit breaker 31 is activated to disconnect the circuit.

The leakage tester 32 has three input terminals 33 , 34 , and 35 and an operation display lamp 36 composed of a light emitting diode. An AC power supply 37 serving as a control power source for operating the leakage tester 32 has one end connected to the input terminal 35 of the leakage tester 32 and the other end connected to the input terminal 34 of the leakage tester 32 . In addition, the other end of the AC power supply 37 is connected to the input terminal 33 of the leakage tester 32 via the remote test switch 38 .

6 is a circuit diagram of a circuit breaker and its leakage test device according to Embodiment 4 of the present invention. In FIG. 6 , the input-side terminals of the first power conversion circuit 311 constituted by a converter are connected to the input terminals 34 and 35 of the leakage tester 32 via resistors. Similarly, the input side terminal of the second power conversion circuit 312 constituted by a current transformer is connected to the input terminals 33 and 34 of the leakage tester 32 via resistors. The first power conversion circuit 311 and the second power conversion circuit 312 convert AC power from the AC power supply 37 into DC power, respectively, and output them from output-side terminals via constant voltage elements 313 and 314 , respectively.

An operation display lamp 36 serving as an operation display unit is connected between output terminals of the first power conversion circuit 311 via a thyristor 45 . The gate of the thyristor 45 is connected to the collector of the first transistor 315 via a resistor. The emitter of the first transistor 315 is connected to the positive terminal of the first power conversion circuit 311 via the second transistor 316 , and the collector is connected to the negative terminal of the first power conversion circuit 311 via a resistor. The base of the first transistor 315 is connected to the negative side terminal of the first power conversion circuit 311 via a resistor and the second photocoupler 42 .

The capacitor 318 is connected between the output terminals of the first power conversion circuit 311 via the second transistor 316 , and is charged to a predetermined voltage by the output of the first power conversion circuit 311 . The reset switch 43 is connected to the base of the second transistor 316 and turns off the second transistor 316 by closing it. The input terminal of the first photocoupler 41 is connected between the output terminals of the second power conversion circuit 312 via the third transistor 319 . The output terminal of the first photocoupler 41 is connected to the input terminal of the second photocoupler 42 .

Furthermore, the circuit breaker 31 configured as an earth leakage breaker includes: a zero-phase current transformer 320 having a secondary winding 322 and a tertiary winding 323 surrounding a main circuit conductor 321 serving as a primary conductor; an electric leakage detection circuit 324 , which detects the leakage of the main circuit conductor 321 according to the output of the secondary winding 322 of the zero-phase converter 320; the fourth transistor 325, which is connected according to the output of the leakage detection circuit 324; release relay (relay) 326 , which is connected in series with the 4th transistor 325; the 5th transistor 327, which is connected in series with the 3rd winding 323 of the zero-phase converter 320; the leakage test circuit 44, which is connected with the base of the 5th transistor 327; and The leakage test switch 328 is connected to the leakage test circuit 44 .

The output terminal of the first photocoupler 41 provided on the leakage tester 32 is connected in series to the input terminal of the second photocoupler 42 , and is connected in parallel to the leakage test switch 328 of the circuit breaker 31 .

In addition, the circuit breaker 31 is provided with a power supply circuit 329 that converts the alternating current from the main circuit conductor 321 into a direct current and outputs it. The input terminal of the second photocoupler 42 supplies direct current.

In the circuit breaker according to Embodiment 4 of the present invention configured as described above, the current circuit breaker 31 is in the on state, and the movable contact contacts the fixed contact to close the circuit to be protected. At this time, the AC power from the AC power supply 37 is converted into DC power by the first power conversion circuit 311 and supplied to the capacitor 318 via the second transistor 316, and the capacitor 318 is charged to a predetermined voltage. The second transistor 316 is turned off when the capacitor 318 is charged to a predetermined voltage.

On the other hand, since the remote test switch 38 connected to the leakage tester 32 is turned off, the second power conversion circuit 312 does not operate, and does not output direct current between its output terminals. Accordingly, the first photocoupler 41 does not operate, and the second photocoupler 42 is turned off. Thereby, the first transistor 315 is turned off, and the thyristor 45 is rendered non-conductive.

And since the thyristor 45 is non-conductive, the operation indicator lamp 36 which consists of a light emitting diode turns off. As a result, it can be confirmed that the leakage tester 32 is not operating by turning off the operation display lamp 36 . In addition, the fact that the circuit breaker 31 is in the ON state can be confirmed by the fact that the operating handle thereof is in the ON position.

The circuit breaker 31 can be switched from the on-state to the off-state, or from the off-state to the on-state, by using an operating mechanism not shown. In addition, when a leakage current flows in the circuit, an unshown operating mechanism can be used. The tripping mechanism performs a tripping operation to open and protect the circuit. The normal opening and closing operation of the circuit breaker 31 and the tripping operation due to the leakage current are performed independently of the operation of the leakage tester 32, and the operation display lamp 36 indicating the operation of the leakage tester 32 remains off. Thus, when the operation display lamp 36 is not lit, if the operating handle of the circuit breaker 31 is at the off position or the trip position, it can be determined that the circuit breaker 31 is in the off state or the trip state by its original function. .

Next, for example, when the remote test switch 38 is closed for the purpose of testing the function of the circuit breaker 31 , the AC power supply 37 is connected to the second power conversion circuit 312 . Thus, the second power conversion circuit 312 converts the AC power from the AC power supply 37 into DC power, and outputs the DC power between its output terminals. The third transistor 319 is turned on by receiving the direct current generated between the output terminals of the second power conversion circuit 312, and turns on the first photocoupler 41. As a result, the second photocoupler 42 is turned on, the leakage test circuit 44 of the circuit breaker 31 is energized, and the fifth transistor 327 is turned on (on).

By turning on the fifth transistor 327, an analog zero-phase current flows through the tertiary winding 323 of the zero-phase converter 320, and the secondary winding 322 and the leakage detection circuit 324 follow it to generate an output, so that the fourth transistor 325 connected. Thereby, the release relay 326 operates, and the circuit breaker 31 is tripped.

On the other hand, by turning on the first photocoupler 41, the second photocoupler 42 is turned on, and the first transistor 315 is turned on. Thereby, the thyristor 45 is turned on by applying a gate signal via the first transistor. As a result, the operation display lamp 36 is turned on. Thereby, when the operating handle of the circuit breaker 31 is at the trip position when the operation display lamp 36 is turned on, it can be determined that the circuit breaker 31 is tripped by the operation of the leakage tester 32 .

The remote test switch 38 is composed of a normally-off self-resetting switch, and after being pressed by an operator to be turned on, the remote test switch 38 is automatically turned off when the pressing force disappears. As a result, the output generation period of the second power conversion circuit 312 is relatively short, and the first photocoupler 41 is only turned on during this short period, but when the first photocoupler 41 is turned on, the second photocoupler 42 immediately turns on. By turning on, the first transistor 315 is turned on, a gate signal is applied to the gate of the thyristor 45, the thyristor 45 is turned on, and the circuit breaker 31 is tripped as described above.

In addition, by turning on the first photocoupler 41, the thyristor 45 is turned on as described above, and the operation display lamp 36 is turned on. However, when the first photocoupler 41 is turned off, the second photocoupler 42 is immediately turned off. Accordingly, the first transistor 315 is immediately turned off, and a gate signal is not applied to the gate of the thyristor 45 . However, once the thyristor 45 is turned on, even if the gate signal is not applied, the thyristor 45 does not become non-conductive unless the current flowing through the thyristor 45 is not zero. That is, when the thyristor 45 is turned on by the application of the gate signal, the conduction is self-maintained, and the operation display lamp 36 is continuously lit.

In order to turn off the lighted operation display lamp 36, the reset switch 43 is turned on. That is, when the reset switch 43 is turned on, the second transistor 316 is turned off, and the current flowing through the thyristor 45 becomes zero. Therefore, the thyristor 45 becomes non-conductive, and the operation display lamp 36 turns off.

As described above, according to the circuit breaker according to Embodiment 4 of the present invention, it can be easily discriminated whether the circuit breaker was opened by the leakage test device operated by a signal from the outside or whether the circuit breaker was opened by the circuit breaker. The original circuit protection function performs an open circuit.

In addition, in the first, second, and fourth embodiments described above, even if a mechanical operation display device is used instead of the operation display lamp 6, the same effect can be obtained. In this case, the control power supply for self-holding of the operation display lamp becomes unnecessary, and the wiring of the trip device 32 can be simplified.

Claims (7)

1. circuit-breaker is characterized in that having:

Open and close the contact, it opens and closes circuit;

Over current trip when it flows through more than or equal to the electric current of setting, makes the said switching contact tripping operation that is in closure state in said circuit;

Confirming operation is used tripgear, and it is based on external signal and by being driven, with the tripping operation that utilizes said over current trip to carry out irrespectively, the said switching contact that will be in closure state is made as off-state; And

The action display part, it shows that said confirming operation is driven this situation with tripgear.

2. circuit-breaker is characterized in that having:

Open and close the contact, it opens and closes circuit;

The leakage tripping device when it flows through leakage current in said circuit, makes the said switching contact tripping operation that is in closure state;

Confirming operation is used tripgear, and it is based on external signal and by being driven, with the tripping operation that utilizes said leakage tripping device to carry out irrespectively, the said switching contact that will be in closure state is made as off-state; And

The action display part, it shows that said confirming operation is driven this situation with tripgear.

3. circuit-breaker according to claim 1 and 2 is characterized in that,

Said action display part makes said demonstration obtain self-sustaining.

4. circuit-breaker according to claim 1 and 2 is characterized in that,

Said action display part is made up of the action display lamp that carries out said demonstration through lighting a lamp.

5. circuit-breaker according to claim 1 and 2 is characterized in that,

Said action display part is by showing that through mechanical type the mechanical type action display unit that carries out said demonstration constitutes.

6. circuit-breaker according to claim 3 is characterized in that,

Said action display part is made up of the action display lamp that carries out said demonstration through lighting a lamp.

7. circuit-breaker according to claim 3 is characterized in that,

Said action display part is by showing that through mechanical type the mechanical type action display unit that carries out said demonstration constitutes.

Images