JP2960913B2 - Handle operating device for earth leakage breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handle operating device for an earth leakage breaker used in combination with an earth leakage breaker with overcurrent protection.

[0002]

2. Description of the Related Art An earth leakage breaker handle operating device is a device for moving a handle of an earth leakage breaker in an on or off direction by driving an arm by a motor, and can be remotely controlled. If a sequence circuit is assembled separately from the handle operating device and connected as an automatic closing mechanism, the ground leakage breaker is tripped, and then the ground leakage breaker is automatically switched on after a lapse of a time set by a timer.

This automatic closing mechanism is particularly effective for an earth leakage breaker installed in an unmanned facility such as a relay station at a remote place. Whenever the earth leakage breaker trips, a worker goes to the place and turns on the earth leakage breaker. There is an effect that the number of operations can be reduced. Even for manned facilities, they are also installed on earth leakage breakers for important electrical facilities that may cause a failure or shorten the life if suddenly stopped.

[0004] The causes of tripping of the earth leakage breaker are roughly classified into overcurrent and earth leakage current. However, the automatic closing mechanism of the conventional handle operating device has a set time lapse regardless of the cause of the earth leakage breaker trip. Later, it was re-introduced uniformly. This is convenient for the operation of the equipment, considering that most of the causes of the trip of the earth leakage breaker are transients such as lightning and radio waves from vehicles running on the road. However, even if the earth leakage breaker trips due to an overcurrent, immediately turning on the earth leakage breaker again may cause a malfunction in the equipment.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and enables automatic or remote control as in the prior art, and furthermore, an automatic closing mechanism when an earth leakage breaker trips due to an overcurrent. The present invention has been made in order to provide a handle operation device for an earth leakage breaker which does not operate the device.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has an automatic closing mechanism for automatically turning on the breaker by operating the handle of the breaker after the earth leakage breaker trips. A handle operating device for an earth leakage breaker, wherein the automatic closing mechanism does not operate when an overcurrent is incorporated in the earth leakage breaker but only when an earth leakage occurs.
Leakage warning from leakage alarm output unit comprising a trip coil that
It is characterized in that it operates only when a notification is received.

According to the handle device for the earth leakage breaker of the present invention, the automatic closing mechanism is activated only when the earth leakage alarm is received from the earth leakage alarm output unit incorporated in the earth leakage breaker. In the case of the cause, the power is turned on again as before, but if the earth leakage breaker trips due to an overcurrent, the earth leakage breaker is not automatically turned on again.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. FIG. 1 is a plan view of a handle operating device for an earth leakage breaker of the present invention, and FIG. 2 is a front view thereof. Reference numeral 1 denotes a main body of the handle operation device, which is installed adjacent to the earth leakage breaker 2 as shown in the figure. The handle 5 of the earth leakage breaker 2 is fitted into a U-shaped handle spring 4 at the tip of the arm 3 extending laterally from the main body 1, and the arm 3 is swung together with the lever 6 by a motor built in the main body 1. When,
The handle 5 is turned on and off. This structure itself is not an essential requirement of the present invention, and may be changed as appropriate.

[0009] The handle operating device for the earth leakage breaker,
An automatic input mechanism 7 is provided. This automatic feeding mechanism 7
It has a function of operating the handle 5 automatically after the earth leakage breaker 2 trips to automatically re-enter the earth leakage breaker 2. In the present invention, when the earth leakage alarm is received from the earth leakage alarm output unit. Only works on

FIG. 3 is a circuit diagram showing a specific example. When the detection circuit 9 of the earth leakage breaker 2 provided with the current sensor 8 detects an earth leakage, a trip circuit 10 such as an SCR is turned on and a trip coil 11 is turned on. Current flows to open the switching unit 12. At this time, the display button is operated by the trip coil 11, and the leakage alarm output unit 13 linked to the display button is turned on, and the leakage alarm is outputted to the automatic closing mechanism 7 of the leakage breaker handle operating device. Although not shown, the earth leakage breaker 2 is provided with a bimetal or an electromagnet connected in series to the main circuit. In the case of an overcurrent, these are activated to open the opening / closing section 12, and a trip coil is provided. Since no current flows through 11, the display button is not operated, and the leakage detection output unit 13 remains off.

The automatic closing mechanism 7 operates as usual when receiving this leakage alarm output, moves the arm 3 after the lapse of the set time, turns on the handle 5 and turns on the leakage breaker 2 again. However, even if the earth leakage breaker 2 trips, if an overcurrent is the cause, no current will flow through the trip coil 11 and the alarm from the earth leakage alarm output unit 13 will not be sent to the automatic closing mechanism 7, so that the automatic closing The leakage of the earth leakage breaker 2 by the mechanism 7 is not performed. For this reason, it is possible to avoid a danger that an overcurrent flows through the equipment again to cause a problem.

FIG. 4 is a circuit diagram showing another specific example. In this example, a voltage detecting resistor 14 is inserted between the trip circuit 10 and the trip coil 11, and a leakage alarm output unit 13 is provided.
Is composed. This leakage alarm output is input to the photocoupler 15 of the automatic closing mechanism 7, and as described above, when receiving the leakage alarm output, the automatic closing mechanism 7 moves the arm 3 after the elapse of the set time, and Re-enter.

[0013]

As described above, the handle operating device for an earth leakage breaker according to the present invention can turn on and off the earth leakage breaker by automatic or remote control as in the conventional case, and when the leakage current is the cause, the conventional case can be used. Similarly, the earth leakage breaker can be turned on again, but when the earth leakage breaker trips due to an overcurrent, the earth leakage breaker is not automatically turned on again. For this reason, it is possible to avoid the danger that an overcurrent flows through the equipment again without causing the cause of the failure to be eliminated, thereby causing a failure.

[Brief description of the drawings]

FIG. 1 is a plan view of a handle operating device for an earth leakage breaker according to the present invention.

FIG. 2 is a front view of the handle operating device for an earth leakage breaker of the present invention.

FIG. 3 is a circuit diagram showing a specific example of a leakage alarm output unit of the leakage breaker.

FIG. 4 is a circuit diagram showing another specific example of a leakage alarm output unit of the leakage breaker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body of handle operation device 2 Earth leakage breaker 3 Arm 4 Handle spring 5 Handle of earth leakage breaker 6 Lever 7 Automatic closing mechanism of handle operation device 8 Current sensor 9 Detection circuit 10 Tripping circuit 11 Trip coil 12 Opening / closing unit 13 Electric leakage alarm output unit 14 Voltage detection resistor 15 Photocoupler

Claims (1)

(57) [Claims] 1. A handle operation device for an earth leakage breaker having an automatic closing mechanism for automatically turning on a breaker again by operating a handle of the breaker after the earth leakage breaker has tripped. Does not operate with the overcurrent built into the
A handle operation device for an earth leakage breaker, which is activated only when an earth leakage alarm is received from an earth leakage alarm output unit having a coil .