- Patent JPS4112130

Document Type and Number:

Japanese Patent JPS4112130

Kind Code:

B1

Abstract:

1,114,071. High-voltage circuit-breakers. GENERAL ELECTRIC CO. 24 Aug., 1965 [5 Oct., 1964], No. 36224/65. Heading H1N. In a high-voltage circuit-breaker having a plurality of series-connected " breaks," each break is shunted by a variable length gap 73, 88. The length of the gap is reduced during a closing operation of the circuit-breaker so that the gap will break down at a lower voltage than will cause a flashover across any insulation parallelling the gap and so protect the insulation from damage should the breaks not close simultaneously. The circuit-breaker may be that of Specification 842,984 and have a resistor in series with auxiliary contacts 73, 76 connected across each main break. The movable contact 76 is opened against the bias of a spring 84 by a movable crosshead 81. When the closing operation is initiated, compressed gas is applied to a piston 102 which turns a latch 95 to release an electrode 88. This electrode is moved by a spring 90a into the dotted line position 89 to define the reduced gap 90. In this position further movement of the electrode is prevented by the latching head 96 abutting a fixed stop 97. Subsequent movement of the crosshead 81 permits the spring 84 to close the contacts 73, 76, the latch 95 moving with the contact 76 to a position where it relatches the head 96. In an alternative arrangement, Fig. 4 (not shown), the electrode 88 surrounds the contact 76 and is moved up to the stop 97 by the initial movement of the contact 76.

JPS52132378	ELECTRODE FOR ATMOSPHERIC BREAKER
JP3247024	SWITCH