In electrical engineering, a disconnector, disconnect switch or isolator switch is used to ensure that an electrical circuit is completely de-energized for service or maintenance. They are only used for breaking the circuit and are often found in electrical distribution and substation, where machinery must have its source of driving power removed for adjustment or repair. Disconnectors can be manual or motor operated and may be paired with an earthing switch to ground the portion that has been isolated from the system for ensuring the safety of equipment and the personnel working on it.High-voltage isolation switches are used in electrical substations to allow isolation of apparatus such as circuit breakers, transformers, and transmission lines, for maintenance. The disconnector is usually not intended for normal control of the circuit, but only for safety isolation. Unlike load switches and circuit breakers, disconnectors lack a mechanism for suppression of electric arcs, which occurs when conductors carrying high currents are electrically interrupted. Thus, they are off-load devices, with very low breaking capacity, intended to be opened only after the current has been interrupted by some other control device.
Specifications
GW4 Type serial Type Outdoor A/C High Voltage Isolator
1.Rated voltage:12KV
2.Excellent operation performance
3.Long life
GW4 Type serial Type Outdoor A/C High Voltage Isolator
GW4 Type serial High Voltage isolator the series of disconnecting switches comply with requirements in GB1985-2004 High-voltage Allemating Disconnecting Switches and Earthing Switches,IEC62271-102:2002AC Disconnecting Switches and Earthing Switches ,and IEC60694:1996 Common Clause for High voltage Switchgear and Control Devices.
Ambient Condition:
• Altitude:≤1000-3000m
•Ambient temperature:no more than 40°C and no less than -30°C(no less than -40°C in alpina areas )
•Wind speed:≤34m/s
•Earthquake intensity:≤8 degree
•Air pollution :IV
•Ice thickness:≤100mm
•the installation location shall be free from flammable ,explosive dangerous articies,chemical corrosion and flerce vibration
•The pollution grade of post insulator :o for general type and 2 for pollution resistance type
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