JPH0311052B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device configured to remotely operate a circuit breaker for preventing overcurrent or overvoltage of a load.

[Conventional technology and problems]

A circuit breaker that can be tripped by overcurrent and/or overvoltage and can be turned on and off manually is known, for example, from Utility Model Application Publication No. 52-8169. . If this type of circuit breaker is installed in an easy-to-operate location, there will be no problem, but if it is located in a remote location or in a location that is difficult to operate, the contacts will return to the on state if the circuit breaker trips. It is especially difficult.

A device in which a motor operating mechanism is attached to a circuit breaker is disclosed, for example, in Japanese Utility Model Publication No. 12165/1973. However, in conventional devices, although electrical operation is possible, manual operation is troublesome.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a circuit breaker device that is compatible with both remote operation and manual operation.

[Means for Solving the Problems] The present invention for achieving the above object will be described with reference to the reference numerals in the drawings showing the embodiments. ，
14 to the on state and the contact 13,
an opening/closing mechanism that opens and closes the contacts 13, 14, including an operating lever 7 that takes an off position to turn off the contacts 14; a circuit breaker 1 consisting of a device that turns off the opening/closing mechanism, a motor 2 that is driven when the contacts 13 and 14 are returned from an OFF state to an ON state, and a rotary plate 9 that is driven by the motor 2. A protrusion 10 provided on the rotating plate 9 is connected to a fulcrum of the operating lever 7 so as to rotate together with the operating lever 7, and when the rotating plate 9 rotates, it engages with the protrusion 10 and rotates the operating lever 7. The protrusion 10 is formed to return the operating lever 7 to the on position, and when the operating lever 7 is manually moved from the on position to the off position and from the off position to the on position.
This relates to a remote control circuit breaker comprising an engaging piece 4 formed so as not to engage with the engaging piece 4.

[Operation] The circuit breaker of the present invention turns off in response to overcurrent and/or overvoltage. When returning this circuit breaker from the off state to the on state, the motor 2
to drive. As a result, the rotary plate 9 rotates and the engagement piece 4 is displaced. Since the engaging piece 4 is connected to the operating lever 7, the operating lever 7 is turned back on based on the displacement of the engaging piece 4. The engaging piece 4 does not engage with the protrusion 10 when the operating lever 7 is manually turned on and off. Therefore, both remote control and manual control using the motor 2 can be performed independently.

〔Example〕

Next, a remotely operated circuit breaker according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. The remote control circuit breaker shown in FIGS. 1 to 3 includes an electromagnetic circuit breaker 1 generally called a circuit protector or breaker, an AC or DC motor 2 for remote control, and an AC or DC motor 2 that is rotated by the circuit breaker. It consists of a rotating body 3, an engaging piece 4 that selectively aligns with the rotating body 3 having a cam function, and a micro switch 5. The circuit breaker 1 has a handle or operating lever 7 for turning on and off the contacts contained in the container 6, and is configured so that it can be turned off not only by an electromagnetic trip but also manually. There is. The operating lever 7 is fixed to a shaft 8, and the shaft 8 is rotatably supported by a bearing provided in the container 6. This shaft 8 protrudes from the container 6, and the engagement piece 4 is fixed to this protrusion. Therefore, the operating lever 7 and the engaging piece 4 are displaced together.

The rotating body 3 is a rotating plate 9 fixed to the shaft of the motor 2.
, two pins 10 are planted on the same circumference at 180 degree intervals on this rotary plate 9, and two pins 10 are placed on the outer circumference of the rotary plate 9.
It has a pair of recesses 11 provided at 180 degree intervals. As is clear from FIG. 4, the pin 10 is connected to the rotating plate 9.
This is a protrusion provided on the holder, which selectively contacts the engagement piece 4 and returns the engagement piece 4 and the operating lever 7 to the on position. This pin 10 is formed so as not to prevent the engagement piece 4 and the operating lever 7 from moving from the on position to the off position. The operating piece 12 of the micro switch 5 selectively enters the recess 11 of the rotary plate 9. Therefore, the microswitch 5 is turned on or off depending on the angular position of the rotating plate 9.

FIG. 5 shows the electrical circuit of the device of FIG. The circuit breaker 1 includes a switch consisting of a fixed contact 13 and a movable contact 14. The movable contact 14 is turned on and off by the operation lever 7 shown in FIG. be done. The fixed contact 13 is connected to a first terminal 17 of the circuit breaker, and the movable contact 14 is connected via an overcurrent trip coil 15 to a second terminal 18 of the circuit breaker. The voltage trip coil 16 connects the movable contact 14 and the third terminal 1 of the circuit breaker.
9. The first of circuit breaker 1
The second terminals 17 and 18 are connected to a line 20 such that the contacts 13 and 14 and the overcurrent trip coil 15 are connected in series to one power line 20 of the AC or DC load circuit to be protected.
The third terminal 19 is connected to the other power supply line 21 of the load circuit via a manual trip switch 22. The motor 2 is connected between one power line 20 and the other power line 21 via an on-return operation switch 23. The microswitch 5 is connected in parallel to the on-return operation switch 23. When the actuating piece 12 of the micro switch 5 enters the recess 11 of the cam 3, the micro switch 5 is kept off, but when the rotating plate 9 rotates due to the rotation of the motor 2 and the actuating piece 12 comes out of the recess 11. , the actuating piece 12 is pressed by the rotating plate 9,
The micro switch 5 is turned on. Therefore,
Push button type ON return operation switch 23 with normally open contact configuration
When the micro switch 5 is turned on and the motor 2 is rotated, the micro switch 5 is turned on, and the motor 2 continues to rotate even if the on operation of the on return operation switch 23 is released. However, when the actuating piece 12 enters the recess 11 again, the micro switch 5 is turned off and the rotation of the motor 2 is also stopped.

(Explanation of FIG. 6) As shown in FIG. 6, the circuit breaker 1 includes a fixed contact 13 and a movable contact 14 arranged in a container 6, and an opening/closing mechanism 24 for opening and closing the movable contact 14. Furthermore, an electromagnetic trip mechanism 25 including an overcurrent trip coil 15 and a voltage trip coil 16 is provided. The opening/closing mechanism 24 includes an operating lever 7 fixed to a shaft 8 and a movable contact 14 in response to the operating lever 7.
This is a known mechanism including a toggle switch mechanism for opening and closing, and is configured to be trip-operated by an electromagnetic trip mechanism 25 as well. Since this circuit breaker 1 is substantially the same as that disclosed in, for example, Japanese Utility Model Application Publication No. 52-8169, detailed description thereof will be omitted.

(Operation) Next, the operation and operating method of this device will be explained. In the on state where the movable contact 14 and the fixed contact 13 are in contact, the overcurrent trip coil 15
When a current of a certain value or more flows through the movable contact 14, the movable contact 14 is turned off, and the operating lever 7 is moved to the off position. In this off state, when returning to the on state by remote control, turn on return operation switch 2.
Turn on 3. Since this switch 23 has a normally open contact configuration, it returns to off when the operation is released.
When the motor 2 is rotated by turning on the switch 23, the operating piece 12 of the macro switch 5 comes out of the recess 11 and is pressed against the rotating plate 9, and the micro switch 5 is turned on, so that the rotation of the motor 2 is maintained. When the rotary plate 9 rotates clockwise as shown in FIG. 2, the pin 10 abuts the engagement piece 4 as shown in FIG. 3, and the pin 10 causes the engagement piece 4 to rotate counterclockwise. As a result, the operating lever 7 also rotates counterclockwise, returning to the on position shown by the chain line in FIG. The rotary plate 9 continues to rotate even after the operation lever 7 and the engaging piece 4 are returned to the on position, but when the actuating piece 12 enters the recess 11, the micro switch 5 returns to the off position, so the rotation of the motor 2 stops. . Therefore, the rotating plate 9 stops at a predetermined angular position. At this stop position, the engaging piece 4
does not prevent pin 10 from moving to the off position. Therefore, the drip operation of the circuit breaker 1 becomes possible.

When the circuit breaker 1 which is in the on state is to be turned off by remote control, the switch 22 is turned on. This causes current to flow through the voltage trip coil 16, turning it off.

(Modifications) The present invention is not limited to the above-described embodiments, but can be modified. For example, as shown in FIG.
Two recessed portions 11 may be provided. Alternatively, as shown in FIG. 8, a convex portion 11a may be provided on the rotary plate 9 to turn off the micro switch 5. Further, instead of the macro switch 5, a photoelectric switch or a magnetically responsive switch, which is turned on or off at a predetermined angular position of the rotating body 3, may be provided. Further, instead of the pin 10, a concave-convex surface on which a corresponding cam surface is formed may be provided. Further, a configuration may be adopted in which the switch 22 and the voltage trip coil 16 are omitted.

〔Effect of the invention〕

As is clear from the above, according to the present invention, it is possible to provide a circuit breaker device that is highly compatible with remote operation and manual operation.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a remote control circuit breaker according to an embodiment of the present invention, Fig. 2 is a partially cutaway left side view of the device shown in Fig. 1, and Fig. 3 is a displacement of the rotating body shown in Fig. 2. Fig. 4 is a perspective view of the rotating body, Fig. 5 is a circuit diagram of the device shown in Fig. 1, and Fig. 6 is a partially cutaway right side view showing the circuit breaker of the device shown in Fig. 1. The top view, FIGS. 7 and 8 are front views showing modified examples of the cam. DESCRIPTION OF SYMBOLS 1...Circuit breaker, 2...Motor, 3...Rotating body, 4...Engagement piece, 5...Micro switch, 7
...Operation lever, 8...Axis, 9...Rotary plate, 10
... Pin, 11 ... Recess, 14 ... Movable contact.

Claims (1)

[Claims] 1. Contacts 13 and 14 for opening and closing a circuit, and an operating lever 7 that takes an on position where the contacts 13 and 14 are turned on and an off position where the contacts 13 and 14 are turned off. A circuit interrupter comprising: a switching mechanism that opens and closes the contacts 13, 14 including a motor 2 that is operated when returning the contacts 13 and 14 from an off state to an on state; a rotary plate 9 driven by the motor 2; a protrusion 10 provided on the rotary plate 9; The rotating plate 9 is connected to the fulcrum of the operating lever 7 so as to rotate together with the operating lever 7.
is formed so as to engage with the protrusion 10 and return the operating lever 7 to the on position when rotated;
and an engaging piece 4 formed so as not to engage with the protrusion 10 when manually moving the operating lever 7 from the on position to the off position and from the off position to the on position. Operational circuit breaker device.