High-Voltage Live-Tank Circuit Breakers

Property Specification

Type: High-Voltage Transmission Line & Transformer Circuit Breaker (170 kV, 4000 A, 50 kA Series)

Features: Nationally developed high-voltage switching equipment Fully evaluated, approved, and operational across serves as a direct domestic replacement for critical imported grid apparatus, delivering field-proven operational reliability, high current-carrying capacity, and robust fault-clearing performance under demanding network conditions.

Description

High-Voltage Live-Tank Breaker Ratings & Performance Data

Electrical & Mechanical Characteristic Engineering Value / Classification
System Nominal / Maximum Voltage Up to 170 kV
Normal Service Current Rating 4000 A maximum continuous
Symmetrical Interrupting Capacity 50 kA (RMS)
Power System Operating Frequency 50 Hz / 60 Hz compatible
Dielectric & Interruption Medium Pressurized SF6 gas
Physical Architecture Outdoor, live-tank pole unit assembly
Actuator System Motor-driven stored-energy spring mechanism (1-pole / 3-pole execution)
Trip / Break Duration Typically 22 – 30 ms
Make / Close Duration Typically 78 – 90 ms
Inter-Pole Synchronization Delta Maximum 5 ms
Earthquake Resistance Standard Certified according to IEEE-693