Live Tank HV Vacuum Breakers (145kv)

Property Specification

Type: High-Voltage Live-Tank Vacuum Circuit Breaker / Clean Air

Features: Engineered with advanced vacuum interrupter technology and greenhouse-gas-free insulation, fluorinated gas emissions. Completely eliminates toxic decomposition byproducts and the need for complex gas monitoring, reporting, handling, or end-of-life recycling procedures. Delivers superior operational endurance with 30 full short-circuit breaking cycles, 10,000 rated load interruptions, and an optional ultra-fast 2-cycle interruption capability. Built on a modular platform with a completely maintenance-free interrupter unit across its entire service life, ensuring full, uncompromised switching performance in severe sub-zero environments down to -60°C.

Applications: Designed for modern high-voltage transmission and distribution substations, utility power networks transitioning away from SF6 technology, renewable energy grid interconnects, industrial power infrastructure, and electrical installations in extreme cold-climate regions requiring environmentally neutral, zero-emission switching solutions.

Description

Technical Data & Performance Specifications

Technical Parameter / Specification Rated Value / Specification
Rated Operating Voltage 145 kV
Full Short-Circuit Interruptions (at 40 kA) 30 operations
Interrupter Units per Phase / Pole 1 unit
Mechanical & Load Switching Endurance (at 3150 A) 10,000 operations
Rated Fault Clearing / Break Duration 2-cycle or 3-cycle options
Continuous Rated Operating Current Up to 3150 A
Short-Time Withstand Current (I_th) Up to 40 kA
Rated Short-Circuit Breaking Capacity (I_sc) Up to 40 kA
Rated Grid Operating Frequency 50 / 60 Hz
Power-Frequency Withstand Voltage (1 min) 275 kV
Lightning Impulse Withstand Voltage (BIL, 1.2/50 μs) 650 kV
Rated Short-Circuit Duration (tk) 3 s
Peak Dynamic Withstand Current (2.7 p.u.) 108 kA
First-Pole-to-Clear Factor (kpp) 1.5 / 1.3 p.u.
Capacitive Voltage Factor (kc) 1.4 p.u.
Operating Ambient Temperature Limits -60°C to +55°C
Recommended Maintenance & Service Intervals 12-year basic visual checks; up to 10,000 operations at 3150 A
Primary Dielectric Insulation Medium Clean Air
F-Gas Weight / Equivalent CO_2 Footprint 0 kg / 0 metric tons