1. High breaking capacity.
2. Reliable operation mechanism.
3. Free of maintenance.
4. Certified quality assurance.
LW36A-145 type outdoor HV SF6 AC circuit breaker is developed for 50Hz, 145kV power system, serving as a controlling and protective device for the power circuit. The circuit breaker's arc-extinguishing medium is SF6 gas and it works with the interrupting technology of auto-expansion and CT30 spring operation mechanism. It is featured by high reliability, enhanced mechanical efficiency and high level of energy-saving. The product is manufactured in accordance with the standards of IEC62271-1 and IEC62271-100.
Detailed Specifications of SF6 Circuit Breaker
Rated Voltage | 145kV |
Rated Power Frequency Withstand Voltage (1min) | 275kV |
Rated Lighting Impulse Withstand Voltage | 650kV |
Rated Frequency | 50Hz |
Rated Current | 3150A |
First Pole to Clear Factor | 1.5 |
Rated Short-circuit Breaking Current | 31.5kA |
Rated Short-circuit Making Current | 80kA |
Rated Short-time Withstand Current | 31.5kA |
Rated Peak Withstand Current | 80kA |
Rated Short-circuit Continuous Time | 4s |
Rated Out-of-synchronism Breaking Current | 8kA |
Rated Line Charge Breaking Current | 31.5A |
Rated Operation Sequence | O-0.3s-CO-180s-CO |
Opening Time | 30±3ms |
Closing Time | 75±8ms |
Close-Open Time | 45~60ms |
Main Loop Resistance | ≤40µΩ |
SF6 Gas Annual Leakage Rate | ≤0.5% |
Mechanical Life | 10000 times |
Radio Interference Level | ≤500µV |
Weight of SF6 Gas | 10kg |
Weight of Circuit Breaker | 1800kg |
Outer Casing Protection Class | IP4X |
Auxiliary Loop Voltage | AC220V/DC220V/DC110V |
Motor Voltage | AC220V/DC220V/DC110V |
