Overview
The GW4-12(17.5/40.5) series outdoor AC high-voltage Isolator switches are suitable for installation in outdoor AC power systems with a frequency of 50Hz. The rated voltages are 17.5KV and 40.5KV respectively. They are used to open and close the circuit when there is voltage but no load on the line. The product complies with the requirements of GB1985 and other relevant standards.
Normal Service Conditions
Altitude: 1000 - 3000m.
Ambient temperature: not higher than +40°C and not lower than -30°C (not lower than -40°C in frigid areas).
Wind pressure: not exceeding 700Pa (equivalent to a wind speed of 34m/s).
Seismic intensity: not exceeding Grade 8.
Ice coating thickness: not more than 10mm.
The installation site should be free of flammable and explosive hazardous substances, chemical corrosion, and severe vibrations.
Pollution grade of support insulators: Grade 0 for the ordinary type and Grade I for the anti-pollution type.
This series of isolating switches meets all the requirements specified in GB1985-89 "AC High-voltage Isolating Switches", IEC129 (1984) "AC Isolating Switches and Earthing Switches", and IEC694 (1980) "Common Provisions for High-voltage Switchgear and Controlgear".
