Property Specification

Type: Extra-High-Voltage Outdoor Horizontal Double-Break Disconnector / Isolating Switch ( up to 550 kV)

Features: Engineered for maximum operational dependability and minimal upkeep, this disconnector supports system ratings up to 550 kV, continuous currents up to 5000 A, and short-time withstand currents up to 63 kA. Its low-friction kinematic linkage delivers minimal electrical contact resistance, paired with dependable interlocking mechanisms for secure performance under harsh environmental conditions. Key highlights include self-wiping contact plates that clear oxidation,

Applications: Outdoor high-voltage and extra-high-voltage substations, switchyards with narrow phase-to-phase spacing requirements, and installations constrained by low overhead or vertical clearance.

Description

Key Technical Performance Specifications

Technical Parameter / Electrical Rating	72.5 kV	123 kV	145 kV	170 kV	245 kV	300 kV	362 kV	550 kV
Rated Maximum Voltage	72.5 kV	123 kV	145 kV	170 kV	245 kV	300 kV	362 kV	550 kV
Continuous Operational Current	Up to 3150 A*	Up to 3150 A*	Up to 3150 A*	Up to 3150 A*	Up to 4000 A*	Up to 4000 A*	Up to 4000 A*	Up to 5000 A
Short-Time Withstand Current Capacity	Up to 40 kA	Up to 40 kA	Up to 40 kA	Up to 40 kA	Up to 63 kA	Up to 63 kA	Up to 63 kA	Up to 63 kA
Power-Frequency Withstand Voltage: Phase-to-Ground	160 kV	230 kV	275 kV	325 kV	460 kV	460 kV	450 kV	620 kV
Power-Frequency Withstand Voltage: Across Open Gap	200 kV	265 kV	315 kV	375 kV	530 kV	595 kV	540 kV	800 kV
Lightning Impulse Withstand (BIL): Phase-to-Ground	350 kV	550 kV	650 kV	750 kV	1050 kV	1050 kV	1175 kV	1550 kV
Lightning Impulse Withstand (BIL): Across Open Gap	400 kV	630 kV	750 kV	860 kV	1200 kV	1050 (+200) kV	1175 (+205) kV	1550 (+315) kV
Switching Surge Impulse Withstand (SIL): Phase-to-Ground	—	—	—	—	—	—	950 kV	1175 kV
Switching Surge Impulse Withstand (SIL): Across Open Gap	—	—	—	—	—	—	800 (+295) kV	900 (+450) kV