HV Vertical-Break Disconnectors (72.5–362kV)

Property Specification

Type: High-Voltage Outdoor Vertical-Break Disconnector / Isolating Switch (72.5 kV to 362 kV)

Features: Built for exceptional operational dependability and low maintenance overhead across voltage classes from 72.5 kV up to 362 kV, this vertical-break disconnector optimizes space consumption in both horizontal and vertical axes. It incorporates a self-aligning, dual-motion contact system paired with jaw-type contacts at both the hinge and break ends. A specialized reverse-loop contact architecture provides high dynamic stability under heavy short-circuit stresses, while a turn-and-twist mechanism delivers smooth blade motion and prevents mechanical over-travel. Additional features include a blade opening angle exceeding 90 degrees and a robust,

Applications: Space-constrained high-voltage substations, outdoor switchyards requiring optimized footprint and tight phase clearances, and power grid installations deployed in regions subject to severe seismic events or severe ice build-up.

Description

Key Technical Performance Specifications

Technical Parameter / Specification 72.5 kV 123 kV 145 kV 170 kV 245 kV 362 kV
Rated Maximum Voltage 72.5 kV 123 kV 145 kV 170 kV 245 kV 362 kV
Continuous Operational Current 2000 A 2000 A 3150 A 3150 A 3150 A 4000 A
Short-Time Thermal Withstand Current 44 kA / 3 s 44 kA / 3 s 63 kA / 3 s 63 kA / 3 s 63 kA / 3 s 75 kA / 3 s
Power-Frequency Withstand Voltage: Phase-to-Ground 175 kV 280 kV 335 kV 385 kV 545 kV 610 kV
Power-Frequency Withstand Voltage: Across Open Gap 192.5 kV 308 kV 368.5 kV 423.5 kV 600 kV 671 kV
Lightning Impulse Withstand (BIL): Phase-to-Ground 350 kV 550 kV 650 kV 750 kV 1050 kV 1300 kV
Lightning Impulse Withstand (BIL): Across Open Gap 385 kV 605 kV 715 kV 825 kV 1155 kV 1430 kV