ZHEJIANG XINKOU POWER EQUIPMENT CO.,LTD
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High-Voltage Protective Equipment
Gang-Operated, Air-Break Disconnect Switch Picture The first device encountered in a substation is typically a disconnect switch.
The most commonly used switch in small to medium substations is a gang-operated, air-break disconnect switch. "Gang-operated" because the three separate switches for each phase are operated as a group from a single control; "air-break" because the switch operates in air rather than in another medium, such as oil.
The purpose of this switch is to disconnect the substation from the incoming line, not to disconnect the transformer from the load. It is like a large safety switch with no load breaking capability. It can only break, or "interrupt" the relatively small "magnetizing current" of the substation transformer. (This is the small amount of current needed to set up the magnetic field in the transformer core.) A substation must first be disconnected from its secondary or load side before the primary or high voltage side can be disconnected using the disconnect switch. High Voltage Power Fuses Picture
Outdoor AC switch disconnector 11kv/400A - 33kv/600A used in 3 phase AC 50/60Hz power circuit, it is used as switching on and switching off at the voltage with no load. It apply to IEC standard. IEC60964:1996, IEC62271-102:2002.
Features:Manufacture according IEC standards.Up to 36kV,900A,200kV BIL.Three phase disconnector.Porcelain and polymer type insulator.Manual and electric drivers.
