Property Specification

Type: High-Voltage Outdoor Horizontal Center-Break Disconnector / Isolating Switch (up to 245 kV)

Features: Engineered for maximum operational dependability with minimal upkeep, this isolating switch operates up to ratings of 245 kV, 3150 A, and 50 kA short-circuit withstand. It features a low-friction mechanical movement that ensures exceptionally low electrical contact resistance. Key attributes include self-wiping contact surfaces that clear oxidation and debris, corrosion-resistant stainless steel springs to maintain stable contact force, an advanced mechanical interlock system for enhanced safety during extreme site conditions, and high ice-breaking capabilities for severe environmental operation.

Applications: Outdoor high-voltage transmission and distribution substations, grid switching stations, feeder and busbar isolation, and flexible substation layouts where a versatile, straightforward, and reliable center-break isolating mechanism is required.

Description

Key Technical Performance Specifications

Technical Parameter / Electrical Rating	72.5 kV	123 kV	145 kV	245 kV
Rated Maximum Voltage	72.5 kV	123 kV	145 kV	245 kV
Continuous Operating Current Class	Up to 3150 A	Up to 3150 A	Up to 3150 A	Up to 3150 A
Short-Time Withstand Current Capacity	Up to 50 kA	Up to 50 kA	Up to 50 kA	Up to 50 kA
Power-Frequency Withstand Voltage: Phase-to-Ground	140 kV	230 kV	275 kV	460 kV
Power-Frequency Withstand Voltage: Across Open Gap	160 kV	265 kV	315 kV	530 kV
Lightning Impulse Withstand (BIL): Phase-to-Ground	325 kV	550 kV	650 kV	1050 kV
Lightning Impulse Withstand (BIL): Across Open Gap	375 kV	630 kV	750 kV	1200 kV