JPH0311053B2 - - 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, if it trips, the contacts will not turn on. Difficult to return. In order to solve this kind of problem, the applicant proposed in Japanese Patent Application No. 60-144250 a device for returning the device to the on position by remote control. However, the method disclosed herein is configured to cause a current to flow through the trip coil to perform a trip operation when the trip coil is turned off by remote control. Even with this configuration, the off state can be obtained by remote control, but there is a problem that the trip coil deteriorates.

Devices in which a motor operating mechanism is attached to a circuit breaker are disclosed in, for example, Japanese Patent Laid-Open Publication No. 146534/1982 and Publication No. 12165 of 1982. but,
In conventional devices, although electrical operation is possible, manual operation is impossible or cumbersome.

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

[Means for Solving the Problems] To achieve the above object, the present invention will be described with reference to the troublesome symbols indicating the embodiments. ，
14 to the on position and the contact 13,
an opening/closing mechanism that opens and closes the contacts 13 and 14, including an operation lever 7 that takes an off position to turn off the contacts 14; A circuit breaker 1 comprising a device for turning off the opening/closing mechanism.
a motor 2 that is driven when returning the contacts 13 and 14 from an off state to an on state and when switching from an on state to an off state; a rotary plate 3 driven by the motor 2; and a rotary plate 3 provided on the rotary plate 3. Protrusion 10
and is connected to the fulcrum of the operating lever 7 so as to rotate together with the operating lever 7, and engages with the protrusion 10 when the rotary plate 3 rotates to return the operating lever 7 to the on position. and a first engaging portion 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. 4a, and the operating lever 7 so as to rotate together with the operating lever 7.
is connected to a fulcrum of the rotary plate 3, and is arranged to form a substantially L shape together with the first engaging portion 4a, and when the rotary plate 3 rotates, it engages with the protrusion 10 and turns the operating lever 7 into the off 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, the protrusion 10 does not engage with the protrusion 10. Part 4c for allowing passage
This relates to a remotely operated circuit breaker comprising a second engaging portion 4b having a second engaging portion 4b.

[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 rotating plate 3 rotates, and the first engaging portion 4a is displaced. Since the first engaging portion 4a is connected to the operating lever 7, the operating lever 7 returns to the on position based on the displacement of the first engaging portion 4a. On the other hand, when obtaining the off state, the rotary plate 3
is engaged with the second engaging portion 4b, and the second engaging portion 4 is engaged with the second engaging portion 4b.
b to the off position. As a result, the operating lever 7 connected to the second engaging portion 4b also returns to the off position. To turn off the circuit breaker,
Overcurrent and/or overvoltage trip operation may also be used, but this will accelerate the deterioration of the overcurrent trip coil or overvoltage trip coil. First and second engaging portions 4
a and 4b do not engage with the protrusion 10 when the operating lever 7 is manually turned on and off. Therefore motor 2
Both remote control and manual operation 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 10. The remote control circuit breaker shown in FIGS. 1 to 6 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 engages 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 on 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.
And one pin 10 planted in this rotary plate 9
and a pair of recesses 11 provided on the outer periphery of the rotating plate 9 at 180 degree intervals. As is clear from FIG. 7, the pin 10 is a protrusion provided on the rotating plate 9.
It selectively contacts the engagement piece 4 and returns the engagement piece 4 and the operating lever 7 to the on position and the off position. This bottle 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 and vice versa. 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.

The engagement piece 4 is formed into an L-shape as a whole and includes a first engagement portion 4a and a second engagement portion 4b.
The first engaging portion 4a is a portion that is pressed by the bottle 10 when the operating lever 7 is returned from the off position shown in FIG. 2 to the on position shown in FIG. This is the part that is pressed by the bottle 10 when moving from the on position shown in FIG. 4 to the off position shown in FIG. 2. The first engaging portion 4a is formed short so as not to interfere with manual movement of the operating lever 7 from the on position shown in FIG. 4 to the off position shown in FIG. Further, the second engaging portion 4b is moved from the off position to the fourth position in FIG.
In order to enable manual movement of the operating lever 7 to the on position shown in the figure, a portion 4c through which a pin 10 passes is provided as shown in FIG. The portion 4c that allows the pin 10 to pass is located between the shaft 8 and the portion 4d that engages with the pin 10 at the tip.

FIG. 10 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 the first terminal 17 of the circuit breaker, and the movable contact 14 is connected to the second terminal of the circuit breaker via an overcurrent trip coil 15.
is connected to terminal 18 of. A voltage trip coil 16 is connected between the movable contact 14 and the third terminal 19 of the circuit breaker. The first and second terminals 17, 18 of the circuit breaker 1 are connected to the line when the contacts 13, 14 and the overcurrent trip coil 15 are connected in series to the power line 20 of one of the AC or DC load circuits to be protected. 20. The third terminal 19 is connected to the other power supply line 21 of the load circuit via a manual trip switch 22. Motor 2 is connected to one power line 20
and the other power supply line 21 via a remote control switch 23. Micro switch 5 is connected in parallel to switch 23. The actuating piece 12 of the micro switch 5 is in the recess 11 of the cam 3.
While the micro switch 5 is in the OFF state, the rotation of the motor 2 causes the rotating plate 9 to
rotates and the actuating piece 12 comes out of the recess 11,
The actuating piece 12 is pressed by the rotating plate 9, and the micro switch 5 is turned on. Therefore, if the switch 23 having a normally open contact structure is turned on and the motor 2 is rotated, the micro switch 5 is turned on.
The on operation of the switch 23 is released and the motor 2 continues to rotate. 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. Reference numeral 24 denotes an auxiliary switch, which is turned on only during trip operation. This auxiliary switch 24 is connected in parallel to switch 23.

As shown in FIG. 9, the circuit breaker 1 includes a fixed contact 13 and a movable contact 14 arranged in a container 6, an opening/closing mechanism 25 for opening and closing the movable contact 14, and an overcurrent trip coil 15 and a voltage A trip mechanism 26 including a trip coil 16 and an electromagnet is provided. The opening/closing mechanism 25 includes an operating lever 7 fixed to a shaft 8 and a movable contact 1 in response to the operating lever 7.
This is a known mechanism including a toggle switch mechanism for opening and closing 4, and is configured to be trip-operated by an electromagnetic trip mechanism 25 as well. The main parts of this circuit breaker 1 are substantially the same as those disclosed in, for example, Japanese Utility Model Publication No. 52-8169 or Japanese Patent Publication No. 51-25587, so a detailed explanation will be omitted. The auxiliary switch 24 is made by the special public company Showa 51-25587.
This is substantially the same as that disclosed in the above publication, and is turned on only during the retop operation. That is, the leaf spring 29 for turning on and off the contacts 27 and 28 springs up in the counterclockwise direction as shown in FIG. 9 only during the trip operation, turning the contacts 27 and 28 on.
The mechanism for turning on the auxiliary switch 24 during the trip operation is a trip rod 31 that is displaced by the armature 30 during the trip operation in the trip configuration 26.
is constructed by associating the plate spring 29 with the plate spring 29. The operating mechanism of this auxiliary switch 24 was developed by Tokko Sho.
Since it is publicly known from No. 51-25587, further detailed explanation will be omitted.

(Operation) Next, the operation and operating method of this device will be explained. When the movable contact 14 and the fixed contact 13 are in the ON state shown in FIG. Move to the off position shown in Figure 2. At the same time, the auxiliary switch 24 detects the trip and turns on.
The motor 2 rotates and the rotary plate 9 rotates clockwise in FIG. As a result, the operating piece 12 of the microswitch 5 comes out of the recess 11 and is pressed against the rotary plate 9 as shown in FIG. 3, and the microswitch 5 is turned on and maintained in the on state. When the motor 2 continues to rotate and the rotating plate 9 rotates clockwise as shown in FIG. 2, the pin 10 hits the first engaging portion 4a as shown in FIG. The engaging portion 4a is rotated counterclockwise. As a result, the operating lever 7 is also rotated counterclockwise and moved to the on position shown in FIG. 4. The rotary plate 9 continues to rotate even after the operating lever 7 and the first engaging portion 4a 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 is stopped. Stop. Therefore, the rotating plate 9 stops at a predetermined angular position. At this stop position, the engaging portion 4
pin 10 does not prevent it from moving to the off position of FIG. Therefore, in the event of a temporary trip such as lightning, it automatically returns to the on state. In addition, circuit breaker 1
When turned on, the auxiliary switch 24 returns to the off state.

In order to change the operating lever 7, which is in the on state shown in FIG. 4, to the off state shown in FIG. 2, the switch 23 having a normally open contact structure is turned on for only a short period of time. As a result, the motor 2 rotates, the rotating plate 9 rotates in the direction of the arrow in FIG. Move it clockwise in Figure 4. Second engaging portion 4b
When the operating lever 7 starts rotating at the same time, the operating lever 7 and the second engaging portion 4b move to the final OFF position shown in FIG. 2 by the force of the spring in the switch groove 25. Since the first engaging part 4a and the second engaging part 4b are integrated, they move at the same time. When the rotary plate 9 rotates 180 degrees, the micro switch 5 turns off, so
Motor 2 is now turned off. Even if the trip switch 22 is turned on, the circuit breaker 1 can be turned off. However, since the life of the trip coil 16 will be shortened if it is transferred, it is desirable to obtain an OFF state by the switch 23 as much as possible.

When manually returning the circuit breaker 1 from the OFF state shown in FIG. 2 to the ON state, the operating lever 7 is turned counterclockwise in FIG. 2 and returned to the ON position shown in FIG. 5. At this time, since the rotating plate 9 does not rotate, the pin 10 is in the same position as the off position shown in FIG. Therefore, the off state cannot be obtained by operating the remote control switch 23. Therefore, if the switch 23 is to be turned off from the state shown in FIG. 5, the switch 23 must be operated twice. When the switch 23 is operated for the first time in the state shown in FIG. 5, the state shown in FIG. 4 is obtained. At this time, the pin 10 crosses the second engaging portion 4b, but since a portion 4c, that is, a recess is provided to allow the pin 10 to pass, the pin 10 cannot be moved to the position shown in FIG. It is possible. When the second operation is performed, the state shown in FIG. 2 is obtained.

When the control lever 7 is manually turned off in the on state shown in FIG. 4, the off state shown in FIG. 6 is achieved.
To turn on the switch 23 from this state, the switch 23 is operated twice. In the first operation, the pin 10 moves to the position shown in FIG. 2, and in the second operation, the ON state shown in FIG. 4 is obtained.

(Modifications) The present invention is not limited to the above-described embodiments, but can be modified. For example, as shown in FIG. 11, a concave portion 11a may be provided in the rotary plate 9 so that the micro switch 5 is turned off. Further, instead of the micro switch 5, a photoelectric switch or a magnetic response switch, etc., which is turned on or off at a predetermined angular position of the rotating body 3, may be provided. Moreover, instead of the bottle 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. Further, the first engaging portion 4a and the second engaging portion 4b may be configured separately. Further, the second engaging portion 4b may have a shape that allows the pin 10 to pass therethrough. Further, instead of the auxiliary switch 24, a device for optically or magnetically detecting the tripping operation of the circuit breaker 1 may be provided. Furthermore, the present invention is applicable even when the auxiliary switch 24 is not provided.

〔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]

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 in the OFF state, and FIG. 3 is a circuit breaker shown in FIG. Fig. 4 is a left side view showing a state in which the moving object has been slightly displaced; Fig. 4 is a partially cutaway left side view of the circuit breaker device turned on by remote control from the off state in Fig. 2; Fig. 6 is a partially cutaway left side view of the device when manually turned on from the off state; Fig. 6 is a partially cutaway left side view of the device when manually turned off from the on state in Fig. 4; 8 is a sectional view of the second engaging portion in FIG. 2, FIG. 9 is a partially cutaway right side view showing the circuit breaker of the device in FIG. 1, and FIG. 10 is a perspective view of the rotating body. This figure is an electric circuit diagram of the device shown in FIG. 1, and FIG. 11 is a front view showing a modification of the rotating plate. DESCRIPTION OF SYMBOLS 1... Circuit breaker, 2... Motor, 3... Rotating body, 4... Engaging piece, 4a... First engaging part, 4b
...Second engaging portion, 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 driven when returning the contacts 13 and 14 from an OFF state to an ON state and when switching from an ON state to an OFF state; a rotary plate 3 driven by the motor 2; and a rotary plate 3. a protrusion 10 provided on 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 a first engaging portion 4a 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; It is connected to the fulcrum of the operating lever 7 so as to rotate together with the operating lever 7, and is arranged to form a substantially L-shape together with the first engaging portion 4a;
The rotary plate 3 is formed to engage with the protrusion 10 to move the operating lever 7 to the off position when the rotary plate 3 rotates, and the operating lever 7 can be manually moved from the on position to the off position and from the off position to the off position. When moving from the off position to the on position, the protrusion 1
0 and a second engaging portion 4b having a portion 4c for allowing passage of the protrusion 10 without engaging.