HV disconnect switch China manufacturer for AIS Substations-252kV 363kV

The disconnector adopts a horizontal center-break structure with two insulator columns per phase. The conductive blade is mounted on the rotating insulator and opens at the center, forming a horizontal isolating break. The design features low operating torque and minimized contact resistance.

The earthing switches can be installed on one or both sides. For 252 kV, the disconnector is motor-operated with three-pole linkage. For 363 kV, the disconnector uses single-pole motor operation with three-pole linkage capability. The earthing switch is manually operated for both voltage levels.

Technical Parameters

• Transmission substations：Isolation of busbars, circuit breakers, and overhead lines at 252 kV and 363 kV
• Grid interconnections：Bus-transfer current switching at transmission switching stations
• Heavy pollution areas：Creepage distance up to 9,450 mm suitable for Class IV (very heavy) pollution environments
• High-altitude installations：Standard design for altitudes up to 2,000 m; customized solutions available for higher altitudes

Order Information

When ordering, specify:

• Product model and rated voltage
• Rated current and rated short-time withstand current
• Creepage distance requirement
• Earthing switch configuration (none, left, right, or both sides)
• Arrangement form (cross or parallel)
• Upper busbar type (soft or hard) and tubular busbar outer diameter
• Operating mechanism (manual or motor), motor voltage, and control voltage
• Number of auxiliary switch contacts
• Installation method
• Altitude and pollution level (if different from standard)