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Circuit breaker and opening and closing method thereof

A circuit breaker and closed state technology, which is applied in the direction of high-voltage air circuit breakers, circuits, electric switches, etc., can solve the problems of reduced operability and enlargement, and achieve the effects of reduced jumpback, good operability, and simple configuration

Active Publication Date: 2008-08-27
HITACHI IND EQUIP SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Therefore, in the case where the operating mechanism of the vacuum valve is, for example, electromagnetically operated, the capacity of its constituent parts, namely permanent magnets and excitation coils, must be increased, thereby increasing the size of the operating mechanism of the vacuum valve.
In addition, there is also a possibility that the operability of the operating mechanism of the vacuum valve may be reduced.

Method used

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  • Circuit breaker and opening and closing method thereof
  • Circuit breaker and opening and closing method thereof
  • Circuit breaker and opening and closing method thereof

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Embodiment 1

[0031] First, the use method and operation method of one embodiment of the commutation type DC circuit breaker which is the circuit breaker of the present invention will be described with reference to FIGS. 5 to 7 .

[0032] In FIG. 5, reference numeral 1 denotes a DC power supply, and a voltage of 1500V is supplied to a general DC feeder line. Symbol 2 represents the load of a train or the like. Symbol 3 represents a feeder for supplying power to a load, and symbol 4 represents a return circuit that connects the load 2 and the DC power supply 1 . The circuit breaker of the present invention, that is, the commutation type DC circuit breaker 5 is inserted into the middle of the feeder 3 to switch the power supplied from the DC power source 1 to the load 2 .

[0033] The commutation type DC circuit breaker 5 is composed of four switches including a first main switch 51 , a second main switch 52 , a first auxiliary switch 53 and a second auxiliary switch 54 , and a control devic...

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Abstract

A reliable circuit breaker is provided which prevents a movable electrode shaft from rebounding in the course of current interruption by an electromagnetic repulsion driving mechanism. In a circuit breaker (5) which comprises a first coil (vacuum valve) (51) and an opening means for driving the operating shaft of the first coil (51) toward an opening direction by electromagnetic repulsion, an electromagnet (301) which holds the first coil (51) closed by the attractive force of a permanent magnet (306) is provided and in opening operation by electromagnetic repulsion, an electromagnetic repulsion coil (170) and a second coil (305b) of the electromagnet (301) are simultaneously excited.

Description

technical field [0001] The present invention relates to a circuit breaker and its opening and closing method, in particular to a circuit breaker and its opening and closing method suitable for a circuit breaker equipped with a disconnecting unit that uses electromagnetic repulsion to quickly drive the operation axial direction of the vacuum valve in the disconnecting direction. Background technique [0002] The disconnecting unit, which uses electromagnetic repulsion to quickly drive the operation axis of the vacuum valve in the disconnecting direction, is composed of an electromagnetic repulsion coil and a ring-shaped copper plate opposite to it. Excitation is performed quickly, and the vacuum valve is turned off by using the electromagnetic repulsion force of the coil current and the eddy current generated on the copper plate. [0003] Among circuit breakers equipped with an electromagnetic repulsion mechanism, there are DC circuit breakers and fast circuit breakers. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/66H01H33/38
CPCH01H33/6662H01H33/596H01H33/38H01H33/6641H02B13/0354
Inventor 森田步细田稔松田佳彦铃木真聪宫下敬一大内茂俊齐藤正昭矢野晃史
Owner HITACHI IND EQUIP SYST CO LTD