JPH06309997A - Motor-driven spring operated breaker - Google Patents

Abstract

PURPOSE:To omit an internal control circuit which is to hinder actuation during a spring in energy accumulation by forming a spring mechanism for actuating a circuit breaker in a double structure, and thereby enabling a reactuation immediately after the tripping of the breaker during the spring in energy accumulation after the breaker was actuated. CONSTITUTION:A spring mechanism for actuating a circuit breaker is provided in double structure, each of which is energized by respective motors 1, 2 for energy accumulation, and if a reactuation command is fed immediately after the tripping of the breaker while the spring is again being energized after the breaker was energized, reactuation is made by that of the double provided actuation springs 11, 12 which has complete the energization. That is, owing to the double structural spring mechanism, that of the actuating solenoids 15, 16 which is out of operation when the first breaker actuating command was given, is put on in case a reactuation command is issued immediately after the tripping of the breaker following the actuation of the breaker. Because the breaker can be again actuated by the spring in the standby condition with energization completed, any internal control circuit to hinder actuating during the spring in energy accumulation can be omitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating mechanism of an electric spring operated circuit breaker.

[0002]

2. Description of the Related Art Regarding the structure and operation of the operating mechanism of an electric spring operated circuit breaker, a conventional method is shown in the attached document "Vacuum switch and its actual application".

In the prior art, there is one closing spring mechanism, and the closing spring is gradually energized by feeding the pawls of the ratchet gear one by one by the rotation of the closing spring storing electric motor, so that the closing ratchet is applied. The energy storage is completed and the system is in the waiting state for loading. Therefore, while the closing spring is being energized by the motor immediately after the circuit breaker is closed, the re-closing operation cannot be performed immediately after tripping the circuit breaker based on this, and the circuit breaker internal control circuit closes the circuit when the circuit breaker is open. Since the circuit breaker re-closing command is not accepted while the spring is being stored, the external control circuit of the circuit breaker issues a re-closing command after the closing spring energy is required and the circuit breaker is re-closed. Was going on.

[0004]

An electric spring operated circuit breaker is closed by the releasing force of a closing spring stored by an electric motor, and when the tripping is tripped, the tripping is stored by the circuit breaker closing operation. Trigger with the release force of the spring.

In contrast to this circuit breaker operating mechanism, the internal control circuit temporarily disconnects the closing command when the circuit breaker is closed in order to prevent repetitive closing and tripping operations and to prevent the circuit breaker operating mechanism from operating before the closing conditions are established. Unless it is closed again, it cannot be closed again.In addition, even if the circuit breaker is open, the closing command cannot be accepted while the closing spring is being stored by the electric motor immediately after closing the circuit. The control circuit cannot be used.

An object of the present invention is to enable reclosing immediately after the breaker trips while the spring is accumulating by the electric motor after the circuit breaker closing operation, and to eliminate the need for an internal control circuit for preventing the closing of the spring during accumulating. It is to provide an electric spring operated circuit breaker.

[0007]

The above object is achieved by providing a double spring mechanism for closing the circuit breaker.

[0008]

[Function] A double spring mechanism for closing the circuit breaker is provided, each of which is energized by the electric motor. After the circuit breaker is energized, the spring is again energized, followed by the tripping of the circuit breaker, and immediately after that, a command for re-closing In case of, the spring which has completed the internal energy storage of the double-providing closing spring enables re-closing.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1 which shows an operating mechanism of a circuit breaker. The energy storage motor 1 and the energy storage motor 2 are rotated, and the ratchet pawl 3 and the ratchet pawl 4 feed the pawls of the ratchet gear 5 and the ratchet gear 6 one by one. Ratchet foot 7 at this time
The ratchet retainer 8 prevents the ratchet gear from rotating in the reverse direction, and the rotation of the shaft 9 causes the closing spring 11 to rotate.
Is energized, the closing latch 13 is applied, the closing spring 12 is energized by the rotation of the shaft 10, and the closing latch 14 is applied.

In the state shown in FIG. 1, the closing spring 12 is in a state where the spring energy is completed and the closing spring 11 is in a spring released state immediately after closing the circuit breaker.

The closing latch is displaced from the position of the closing latch 14 to the position of the closing latch 13 by the operation of either the closing solenoid 15 or the closing solenoid 16 provided with an electric interlock in response to a command from the circuit breaker. The spring releases the force, and the closing cam rotates from the position of the closing cam 18 to the position of the closing cam 17 (in the direction of the arrow).
The movable electrode 25 of the circuit breaker operates (in the direction of the arrow) by operating the lever 21 and the lever 21 about the pins 22 and 23 (in the direction of the arrow) and rotating the shaft 24 (in the direction of the arrow) to connect to the fixed electrode 26. The circuit breaker is turned on. Also,
When the shaft 24 rotates (in the direction of the arrow), the tripping spring 27 is energized at the same time.

When the circuit breaker trip command is issued following the closing of the circuit breaker, the tripping solenoid 28 operates and the tripping latch 19 is disengaged so that the shaft 2 is released when the circuit breaker is closed.
By releasing the tripping spring 27 stored by the rotation of 4 (arrow direction), the shaft 24 reversely rotates (reverse arrow direction), and the movable electrode 25 of the circuit breaker trips (reverse arrow direction). Direction) to move away from the fixed electrode 26, the circuit breaker is tripped.

At the same time, the reverse rotation of the shaft 24 (reverse direction of the arrow) causes the lever 20 and the lever 21 to operate (reverse direction of the arrow) to reach the closing standby lever position. At this time, the closing cam used when closing the circuit breaker was rotated (in the direction of the arrow) from the position of the closing cam 17 which is the circuit breaker closing position by the energy storing motor to start storing energy in the closing spring. If the circuit breaker is not closed and a breaker reclosing command is issued, the closing cam cannot be used again.

According to the present invention, since the closing spring mechanism is doubled, even when a further breaker re-closing command is issued immediately after the breaker is removed after the breaker is closed,
Of the closing solenoid 15 or the closing solenoid 16,
At the time of the first breaker closing command, the closing solenoid on the side not operating can be operated to complete the energy storage, and the closing spring can be closed again by the closing spring in the closing waiting state.

[0015]

According to the present invention, the closing operation of the electric motor after the closing operation of the circuit breaker enables the reclosing operation immediately after the trip, and the opening and closing of the electric circuit using the circuit breaker. It is possible to facilitate control or operation such as power supply switching control by a circuit breaker. Further, it is possible to dispense with the operation limitation of the circuit breaker internal control circuit during the internal spring accumulation.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of an electric spring operating mechanism for closing of an electric spring operated circuit breaker which is the object of the present invention.

[Explanation of symbols]

1, 2 ... electric power storage motors, 3, 4 ... ratchet pawls, 5, 6
... ratchet gear.

Claims (1)

[Claims] 1. An electric spring-operated circuit breaker having a control circuit for opening and closing an electric circuit, wherein a spring mechanism for closing the circuit breaker is provided in duplicate and means for energizing the spring by an electric motor, and the accumulated double And a means for closing the circuit breaker by sequentially using the springs of 1.