JP2821058B2 - Electric circuit breaker operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric operating device for a circuit breaker for remotely operating a handle of the circuit breaker.

[0002]

2. Description of the Related Art An electric operating device for a circuit breaker operates a handle of the circuit breaker by the power of a drive unit such as a motor. For example, the electric operating device of the circuit breaker is installed on a side surface of the circuit breaker, and an operation unit for operating a handle of the circuit breaker by a remote signal is extended from the electric operating device and has three terminals for receiving a remote operation signal. (ON, OFF, common line) are prepared, an ON terminal and an OFF terminal are connected, and a two-wire one-shot switch is connected between the ON terminal and the common terminal. When the one-shot switch is pressed once while the circuit breaker is in the off position, the operation unit moves the handle of the circuit breaker to the on position, and when the switch is pressed again, the operation unit moves the handle of the circuit breaker to the off position ( To reset).

A description will be given of a proposed example. As shown in FIG. 7, a drive unit having an operation unit 11 for operating a handle 8 of a circuit breaker 9 and a motor 18 capable of reciprocally rotating the operation unit 11 is provided. 1 and an on-switch unit 35 for operating the motor 18 so that the handle 8 is turned on, and an off-switch unit 36 for operating the motor 18 so that the handle 8 is turned off. And a control circuit 2 having a pair of position detection switches 5 and 7 for detecting the operation unit 11 operated to the OFF position and stopping the motor 18, a relay 3 for operating the ON switch unit 35 and the OFF switch unit 36, and A pair of conducting direction control diodes 61 and 6 whose opposite ends are connected to the coil of the relay 3 via the switching contact 31 of the relay 3 respectively.
2 and a current detecting zener diode 9 connected to the other ends of the conduction direction controlling diodes 61 and 62.
3, 96 and resistors 94 and 95, and zener diodes 93 and 96 connected to zener diodes 93 and 96.
The light emitting portions 35a and 36a of the photothyristor coupler which emit light by the operation of the photo switch and operate the ON switch 35 and the OFF switch portion 36 which are light receiving portions, and the light emitting portions 35a and 36a
And an operation switch unit 6 for supplying a current for driving the relay 3 by operation. Reference numeral 24 denotes a power supply circuit, and reference numerals 32 and 33 denote fixed contacts with which the switching contact 31 contacts.

[0004]

However, in this electric operating device for a circuit breaker, its own switching contact is connected in series to the coil of the relay 3 and the coil current is turned on and off by the switching contact. For example, when operated by the operation switch unit of the one-shot switch, a situation occurs in which the switching contact is not switched due to the operation time of the relay 3, and the operation may not be stably performed.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a circuit breaker electric operating device which can stably and surely remotely control a circuit breaker even when a one-shot switch is used for an operation switch section. .

[0006]

According to a first aspect of the present invention, there is provided an electric operating device for a circuit breaker having an operating portion for operating a handle of the circuit breaker, and a motor capable of reciprocatingly rotating the operating portion. A drive unit, an on-switch unit for operating the motor so that the handle is turned on, an off-switch unit for operating the motor so that the handle is turned off, and the handle is turned on and off. A control circuit having a pair of position detection switches for detecting the operation unit operated to a position and stopping the motor, a relay circuit for operating the on-switch unit and the off-switch unit, and an operation switch for operating the relay circuit The relay circuit is of a two-winding latching type, and is connected to one end of each winding via a resistor via a resistor. The common end of the switching contact is connected to the other end of the winding, and the switching end of the switching contact is connected to the other end of the winding to switch the switching contact. A relay for switching to the winding, a pair of energization direction control diodes inserted between the other end of the winding and the operation switch unit so as to have opposite polarities, and each of the windings. A pair of opening / closing means connected in series, and detecting the current flowing through the conduction direction control diode through the switching contact when the operation switch unit is operated, and detecting the current of the winding connected to the conduction direction control diode. It comprises a pair of current detecting means for turning on the opening / closing means, and a pair of operating parts for operating the on-switch part or the off-switch part in conjunction with the operation of these current detecting means. It is an.

The electric operating device for a circuit breaker according to claim 2 is
2. The device according to claim 1, wherein the current detection unit includes a light emitting unit of a photothyristor coupler that operates the switching unit, and the switching unit is a light receiving unit of the photothyristor coupler.

[0008]

According to the electric operation device for a circuit breaker of the first aspect, when the steering wheel is turned on by the operation switch section, a current flows in one direction through the switching contact of the relay and one of the conduction direction control diodes. When the current is detected by the current detecting means, the operating part operates to operate the on-switch part, and the switching means connected to the conduction direction control diode through which the current flows is turned on, and the winding of the relay is excited. Is done. Thereby, the switching contact of the relay is switched. In addition, the operation of the on-switch unit causes the control circuit to operate, the motor of the drive unit to rotate in one direction, the operation unit to operate in one direction, and the steering wheel to be turned on. Stops.

On the other hand, when the steering wheel is turned off by the operation switch section, a current flows in the other direction through the switching contact of the relay and the other diode for controlling the direction of conduction, and when this current is detected by the current detecting means, the operating section operates. As a result, the off-switch section operates, and the switching means connected to the conduction direction controlling diode through which the current flows is turned on, so that the winding of the relay is excited. Thereby, the switching contact of the relay is switched. In addition, the operation of the off switch unit causes the control circuit to operate, the motor of the drive unit to rotate in the other direction, the operation unit to operate in the other direction, and the steering wheel to be turned off. Stops.

In this case, since the switching contact is not connected in series to the winding of the relay as in the proposed example, each winding can be energized irrespective of the opening and closing of the switching contact, and the operation reliability of the switching contact for switching the current is improved. Therefore, even if a one-shot switch is used for the operation switch section, the circuit breaker can be remotely and stably and reliably operated. According to the electric operation device for a circuit breaker of claim 2, in claim 1, the current detecting means has a light emitting portion of a photothyristor coupler operating the opening / closing means, and the opening / closing means is a light emitting portion of the photothyristor coupler. Since the light receiving unit is used, in addition to the effect of the first aspect, further miniaturization can be achieved by using a semiconductor.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. That is, the electric operating device of the circuit breaker includes the drive unit 1, the control circuit 2, the relay circuit 3, and the operation switch unit 6. The drive unit 1 includes a circuit breaker 9
Operating unit 11 for operating the handle 8 of the
The motor 18 is capable of reciprocatingly driving the motor 18. Generally, the circuit breaker 9 is provided with a handle 8 on the upper surface as shown in FIG.
And a terminal 10 is provided at both ends of the handle 8 in the operation direction. Although the mechanism inside the circuit breaker 9 is not shown because it is publicly known, in general, an abnormal current detector, a trip link corresponding to the abnormal current detector, a latch link latched by the trip link, and a latch link And a movable contact that opens and closes when the handle 8 is turned on and off and is tripped when the latch link is released, and the circuit breaker 9 of the handle 8 is in the reset position. Therefore, by turning off the handle 8, it is possible to latch the released latch link to the trip link that has already returned.

The drive unit 1 of the embodiment is provided on the side in the direction perpendicular to the operation direction of the circuit breaker 9 as shown in FIGS. 3 to 5, and the base 13 and the cover 14 are pinned as shown in FIG.
And is integrally connected to the circuit breaker 9 by connection means (not shown). The driving unit 1 includes a motor 1 operated by a remote signal.
1, a control circuit 2 for controlling the motor 18 and a means 12 arranged in the direction of operation of the operating section 11 to linearly move the operating section 11 in conjunction with the motor 18;
Has a screw shaft 15 and a guide shaft 19 which is parallel to the screw shaft 15 and slidably supports the operation unit 11. Motor 1
Reference numeral 8 is for forward and reverse rotation, and is fixed to one end of the base 13 so that the axial direction of the rotating shaft 20 is oriented in the direction in which the handle 8 protrudes. A base 21 is erected on the side of the motor 18, the screw shaft 15 is rotatably supported on the base 21, and a guide shaft 19 is supported. The bevel gear 22 is connected to the rotating shaft 20, the bevel gear 23 meshes with the bevel gear 22, and one end of the screw shaft 19 is connected to the bevel gear 23. Therefore, when the motor 18 rotates, the rotating shaft 2
0, power is transmitted in the order of the bevel gears 22, 23 and the screw shaft 15, and the rotation of the screw shaft 15 causes the operating unit 11 to move in the axial direction to turn the handle 8 on or off.

The operating portion 11 is screwed to the screw shaft 15 and slidably supported by the guide shaft 19, and the base end slides in the guide recess 26 in the center of the upper surface of the moving member 25. The operating member 27 is freely supported, and a notch 28 is formed at the distal end of the operating member 27 so as to engage with and disengage from the handle 8 as shown in FIG. That is, by sliding the operation member 27 with respect to the moving body 25, the operation member 27
The notch 28 is disengaged from the handle 8 and the handle 8 can be directly manually operated in the disengaged state.

The control circuit 2 has an on-switch unit 35 for operating the motor 18 so that the handle 8 is turned on.
A pair of position detecting switches for operating the motor 18 so that the handle 8 is turned off, and for stopping the motor 18 by detecting the operation unit 11 that has operated the handle 8 to the on position and the off position; 5 and 7.

In the embodiment, as shown in FIG. 2, a motor control circuit 44 constituted by a transistor bridge composed of transistors Tr1 to Tr4 for rotating the motor 18 in the normal and reverse directions, and an on-switch unit 35 and an off-switch unit 36 are operated. And a control unit 43 that latches the signal when the ON / OFF signal is input and releases the latch when the position detection switches 5 and 7 operate. The control unit 43 includes a transistor Tr1 of the motor control circuit 44. , Tr3, and a signal latch unit 112 for normal rotation, which is a NAND circuit for supplying a signal for driving the driving transistors Tr3, Tr3.
A signal latch unit 113 for reverse rotation, which is a NAND circuit that supplies a signal for driving Tr4.

The motor control circuit 44 has input terminals 39, 40
And the output terminal is connected to the motor 18. The signal latch unit 112 includes an input unit 50 for inputting an ON position signal of the ON switch unit 35 and outputting an output signal, and a reset input unit 51 for receiving a stop signal of the position detection switch 5 and stopping the output signal. The signal latch unit 113 has an input unit 52 for inputting an off position signal of the off switch unit 36 and outputting an output signal, and a reset input for stopping an output signal in response to a stop signal of the position detection switch 7. It has a part 53. Therefore, the signal latch unit 11 for normal rotation
The transistors Tr1 and Tr3 of the motor control circuit 44 are turned on by the output signal of 2, and a current flows in the direction for rotating the motor 18 in the normal direction, so that the motor 18 rotates in the normal direction. Conversely, the transistors Tr2 and Tr4 of the motor control circuit 44 are turned on by the output signal of the signal latch unit 113, and the motor 18
Current flows in the direction to reverse the rotation of the motor 18 and the motor 18 rotates in the reverse direction. The forward rotation of the motor 18 causes the screw shaft 15 to rotate in one direction, and the operation unit 11 pushes the handle 8 from the off position to the on position. Further, the screw shaft 15 rotates in the opposite direction due to the reverse rotation of the motor 18, and the operation unit 11 pushes the handle 8 from the ON position to the OFF position.

The on-switch unit 35 outputs an on-position signal for operating the handle 6 to the on position.
One end is connected to the input terminal 50 of the signal latch unit 112,
The other end is connected to the input terminal 40 and to the power supply circuit 24. As shown in FIG. 1, a light receiving section of a photothyristor coupler is applied to the on-switch section 35 of the embodiment. The off switch section 36 outputs an off position signal for operating the handle 8 to the off position, and the signal latch section 11
3 has one end connected to the input terminal 52 and the other end connected to the input terminal 4.
0 and connected to the power supply circuit 24. As the off-switch section 36 of the embodiment, a light receiving section of a photothyristor coupler is applied as shown in FIG.

The position detecting switch 5 detects the operating section 11 which has pushed the handle 8 to the ON position and outputs a stop signal. The position detecting switch 5 is a micro switch as an embodiment and has a base as shown in FIGS. Moving body 25 of base 21 in 13
Is disposed at a predetermined position opposite to the above. One end is connected to the input terminal 40, and the other end is connected to the reset input unit 51 of the signal latch unit 112. When the position detection switch 5 is pressed by the moving body 25, the switch is turned on, a stop signal is input to the reset input unit 51, the output signal of the signal latch unit 112 is stopped, and the transistors Tr1 and Tr3 of the motor control circuit 44 are turned off. Then, the power supply to the motor 18 is stopped.

The position detection switch 7 detects the operation section 11 that has pushed the handle 8 to the off position and outputs a stop signal. The position detection switch 7 is a micro switch as an embodiment and moves as shown in FIGS. Installed at a predetermined position facing the moving body 25 of the base 21 in the base 13 facing the body 25,
One end is connected to the input terminal 40 and the other end is connected to the signal latch unit 11.
3 is connected to the reset input unit 53. Moving body 25
When the position detection switch 27 is pressed and turned on by the movement of the switch, the stop signal is input to the reset input unit 53, the output signal of the signal latch unit 113 stops outputting, and the transistors Tr2 and Tr4 of the motor control circuit 44 are turned off. Becomes
Power supply to the motor 18 stops.

The relay circuit 3 operates the on-switch unit 35 and the off-switch unit 36, and is a two-winding latching type.
7, the common end of the switching contact 88 is connected together, and the switching ends of the switching contact 88 are respectively connected to the other ends of the windings 85 and 86, and the winding 8 in which the switching contact 88 is switched
A relay 89 for switching the switching contact 88 to the windings 85 and 86 on the non-excitation side when the windings 5 and 86 are excited;
6 is connected in series to each of a pair of conducting direction control diodes 61 and 62 inserted between the other end of the control switch unit 6 and the operation switch unit 6 so as to have opposite polarities, and windings 85 and 86, respectively. A pair of opening / closing means 90, 91 and a winding connected to the conduction direction control diodes 61, 62 by detecting a current flowing through the conduction direction control diodes 61, 62 through the switching contact 88 when the operation switch unit 6 is operated. 85,8
6, a pair of current detecting means 105, 106 for turning on the opening / closing means 90, 91, and these current detecting means 105, 1
And a pair of operating parts 35a and 36a that operate the on-switch part 35 or the off-switch part 36 in conjunction with the operation of Step 06. The common end of the windings 85 and 86 and the common end 107 of the remote switch 65 of the operation switch unit 6 are connected to the power supply circuit 2.
4 is connected.

The current detecting means 105 and 106 include current value detecting resistors 94 and 95 connected in series to the conduction direction controlling diodes 61 and 62, and a Zener diode connected in parallel to the current value detecting resistors 94 and 95. 93 and 96. That is, when the current flowing through the current value detection resistors 94 and 95 increases and exceeds the Zener voltage, the Zener diodes 93 and 96 are turned on and the current detection operation is performed.

The switching means 90 and 91 are normally open contacts of coils 100 and 101 of an auxiliary relay connected in series to zener diodes 93 and 96. That is, when the operation of the current detection means 105, 106, that is, the operation of the Zener diodes 93, 96, the coils 100, 101 of the auxiliary relay are excited, and the switching means 9, which is a normally open contact, is opened.
0 and 91 are turned on.

The operating sections 35a and 36a are light emitting sections for the light receiving section of the photothyristor coupler used in the on-switch section 35 and the off-switch section 36, and are connected in series to the coils 100 and 101. Accordingly, the operating sections 35a and 36a emit light in conjunction with the operation of the current detecting means 105 and 106, and the ON switch section 35 or the OFF switch section 36 as the light receiving section operates.

The connection terminals 102 and 103 of the operation switch unit 6 are provided on the current value detection resistors 94 and 95, respectively. The operation switch unit 6 operates the relay circuit 3. The embodiment is a one-shot switch, in which a remote switch 65 having a switching contact, a pair of thyristors 66 and 67 connected to the on-side contact of the remote switch 65 in anti-parallel with each other, and connected to the off-side contact of the remote switch 65 Capacitor 68 and resistor 69, and capacitor 68
And an off-display light emitting diode 70 and a resistor 73 connected between the connection point of the resistor 69 and the gate of the on thyristor 67, and a transistor 71 and a diode connected between the anode and the gate of the off thyristor 66. 72, and an ON display diode 74 connected between the base of the transistor 71 and the connection point of the OFF display light emitting diode 70 and the resistor 73. 75 is a gate resistance of the off thyristor 66. The output terminal 104 of the operation switch unit 6 is connected to the connection terminal 1 of the relay circuit 3.
02 and 103, and the common terminal 107 of the remote switch 65 is connected to the power supply circuit 24.

In FIG. 2, reference numeral 60 denotes an inspection switch, which is connected in series to the on-switch unit 35 and the off-switch unit 36. Therefore, when the inspection switch 60 is turned off, the circuits of the on-switch unit 35 and the off-switch unit 36 are opened.
Does not work. Reference numeral 77 denotes an inspection ON switch, which is connected in parallel to a series circuit of the ON switch unit 35 and the inspection switch 60 as shown in FIG. Therefore, when the inspection ON switch 77 is operated, the motor 18 rotates forward by the operation when the ON switch section 35 is operated. Reference numeral 78 denotes an inspection off switch, which is connected in parallel to a series circuit of the off switch unit 36 and the inspection switch 60 as shown in FIG. Therefore, when the inspection off switch 78 is operated, the motor 18 reversely operates by the operation when the off switch unit 36 is operated. FIG. 3 shows the inspection switch 60 and the inspection on switch 7.
7, the buttons of the inspection off switch 78 are shown, and the inspection display lamp 79 and the trip display lamp 80 are shown. The inspection indicator lamp 79 is an inspection switch (77, 7
Lighting is performed using the separate contact of 8). The trip display lamp 80 is turned on by an alarm switch (not shown) linked with the trip operation of the circuit breaker 9.

The operation will be described. First, when power is supplied from the power supply circuit 24, the power supply circuit 2 is turned on in the state of FIG.
4, a current of about 3 mA flows through the resistor 87, the switching contact 88 of the relay 89 (state of the solid line), the conduction direction control diode 62, and the current value detection resistor 95, and the ON display light emitting diode 74 of the operation switch unit 6 Although lit, the Zener diode 96 is off because the voltage between the current value detection resistors 95 is small. That is, in this state, the ON state is displayed by the ON display light emitting diode 74, and the handle 8 of the circuit breaker 9 is in the ON position.

The steering wheel is turned off by the operation switch unit 6. That is, from the state of FIG.
Is turned on, the off thyristor 66 is turned on, and the thyristor 66 is turned on through the 3 mA current path, ie, the switching contact 88 of the relay 89 and the current direction controlling diode 62.
0 times or more current flows. When this current flows through the current value detection resistor 95 and the voltage at both ends exceeds the Zener voltage, the Zener diode 96 is turned on, and the current detection means 106 performs a detection operation. When the current detecting means 106 performs the detecting operation, the operating portion 36a of the photothyristor coupler
Emits light, and the off switch section 36, which is the light receiving section, operates. In addition, since the coil 101 of the auxiliary relay is excited, the opening / closing means 91 which is a contact connected to the conduction direction controlling diode 62 through which current flows is turned on,
The winding 86 of the relay 89 is excited. Thereby, the switching contact 88 of the relay 89 switches from the state of the solid line in FIG. 1 to the state of the broken line. When an output signal is generated by the operation of the off switch unit 36, the control circuit 2 operates as described above, and the motor 18 of the drive unit 1 rotates in a direction to turn off the handle 8, and the operation unit 11 turns off the handle 8. When the operation unit 11 is detected by the position detection switch 7, the motor 18 stops.

Further, the state where the switching contact 88 is indicated by a broken line is a state in which power is supplied from the power supply circuit 24, the current value detecting resistor 94, the conduction direction controlling diode 61, the switching contact 88 (the state indicated by the broken line), A current of about 3 mA flows through the resistor 87, and the off-display light-emitting diode 70 of the operation switch section 6 is lit. However, the Zener diode 93 is off because the voltage between the current value detection resistors 94 is small. That is, in this state, the off display is performed by the off display light emitting diode 70, indicating that the handle 8 of the circuit breaker 9 is in the off position.

The steering switch is turned on by the operation switch unit 6. That is, when the remote switch 65 is turned on again, the on thyristor 67 is turned on, and
A current of 10 times or more flows through the current path of mA, that is, the switching contact 88 of the relay 89 and the current direction controlling diode 61. When this current flows through the current value detection resistor 94 and the voltage at both ends exceeds the Zener voltage, the Zener diode 93 is turned on, and the current detection means 10
5 performs a detection operation. When the current detecting means 105 performs a detecting operation, the actuating section 35a of the photothyristor coupler emits light, and the ON switch section 35, which is the light receiving section, operates. Further, since the coil 100 of the auxiliary relay is excited, the opening / closing means 90 which is the contact connected to the conduction direction control diode 61 through which the current flows is turned on, and the relay 89
Is excited. Thereby, the switching contact 88 of the relay 89 switches from the state of the broken line in FIG. 1 to the state of the solid line. When an output signal is generated by the operation of the on-switch unit 35, the control circuit 2 operates as described above, and the motor 18 of the driving unit 1 rotates in a direction to turn on the handle 8, and the operation unit 11 turns on the handle 8. When the operation unit 11 is detected by the position detection switch 5 at that time, the motor 18 stops. Then, when a current flows through the switching contact 88 in the state of the solid line, the light-emitting diode 74 for on display is turned on to display on as described above.

According to this embodiment, since the switching contact 88 is not connected in series to the windings 85 and 86 of the relay 89 as in the proposed example, each winding 85 and 86 has its switching contact 88
Irrespective of the opening and closing of the switch, the operation reliability of the switching contact 88 for switching the current is increased, and even if the one-shot switch is used for the operation switch section 6, the circuit breaker 9 can be remotely operated stably and reliably. .

FIG. 6 shows a second embodiment of the present invention. That is, in the electric operating device of this circuit breaker, the current detecting means 105 and 106 have the light emitting portion 100 of the photothyristor coupler operating the switching means 90 and 91, and the switching means 9
Reference numerals 0 and 91 designate light receiving portions of the photothyristor coupler, and the other components are the same as those in the first embodiment. According to this embodiment, in addition to the same effect of the first aspect, further miniaturization can be achieved by using a semiconductor.

In the above-described embodiment, a photothyristor coupler is used for the ON switch section 35 and the OFF switch section 36, but a switching contact such as a relay 89 may be used. The operation switch section 6 is not limited to a two-wire type one-shot switch, but may be a normal three-wire type contact switch connected to each of the conduction direction control diodes 61 and 62.

[0033]

According to the electric operating device for a circuit breaker of the present invention, since the switching contact is not connected in series to the winding of the relay as in the proposed example, each winding is opened and closed by the switching contact. Irrespective of this, current can be supplied, the operation reliability of the switching contact for switching the current is increased, and even if a one-shot switch is used for the operation switch section, the circuit breaker can be remotely and stably and reliably operated.

According to a second aspect of the present invention, in the first aspect, the current detecting means has a light emitting portion of a photothyristor coupler for operating the switching means.
Since the opening / closing means is a light receiving portion of the photothyristor coupler, the size can be further reduced by using a semiconductor in addition to the function of claim 1.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a first embodiment of the present invention.

FIG. 2 is a circuit diagram of the control circuit.

FIG. 3 is an overall perspective view.

FIG. 4 is a plan view with a cover removed.

FIG. 5 is a sectional view thereof.

FIG. 6 is a circuit diagram of a second embodiment.

FIG. 7 is a circuit diagram of a proposal example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 drive unit 2 control circuit 3 relay circuit 5, 7 position detection switch 6 operation switch unit 8 handle 9 circuit breaker 11 operation unit 18 motor 35 on switch unit 36 off switch unit 35 a, 36 a operating unit 61, 62 Diode 85, 86 Winding 87 Resistance 88 Switching contact 89 Relay 90, 91 Opening / closing means 105, 106 Current detecting means

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-299001 (JP, A) JP-A-5-151880 (JP, A) JP-A-51-132440 (JP, A) 81193 (JP, B2) Jiko 62-163842 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01H 71/70 H01H 75/02 H01H 33/36 H01H 47/22

Claims (2)

(57) [Claims] 1. A drive unit having an operation unit for operating a handle of a circuit breaker, a drive unit having a forward / reverse rotation motor for reciprocating the operation unit, and operating the motor so that the handle is turned on. A pair of switches having an on-switch portion and having an off-switch portion for operating the motor so that the handle is turned off, and further detecting the operating portion that has operated the handle to an on position and an off position and stopping the motor; An electric operation device for a circuit breaker, comprising: a control circuit having a position detection switch, a relay circuit that operates the ON switch unit and the OFF switch unit, and an operation switch unit that operates the relay circuit. Is a two-winding latching type, in which one end of each winding is connected to a common end of a switching contact via a resistor, and the other end of the winding is connected to the switching contact. A relay for switching the switching contact to the winding on the non-excited side when the winding whose switching end is connected and the switching contact is switched is excited, and each other end of the winding and the A pair of conducting direction control diodes inserted between the operation switch unit so as to have opposite polarities, a pair of opening / closing means connected in series to each of the windings, and when operating the operation switch unit. A pair of current detection means for detecting a current flowing through the conduction direction control diode through the switching contact and turning on the opening / closing means of the winding connected to the conduction direction control diode; And a pair of operating portions for operating the on-switch portion or the off-switch portion in conjunction with the operation of (1). 2. The photo-thyristor coupler according to claim 1, wherein said current detecting means includes a light-emitting part of a photothyristor coupler operating said switching means.
An electric operating device for the circuit breaker according to the above.