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Parameters:
Rated voltage:252kV,550kV.
Rated current:2000-6300A
Rated breaking current,3s:50kA
Features:
Compact design,three phases Busbar in common tank,save installation area
Rated breaking current 50kA for the circuit breakers.
High operation reliability,less maintenance.
High anti-seismic capability.
The sealing system which has proven extremely reliable over years of utilizaiton.
Meet customer requirements by modular design.
| Rated voltage | kV | 252 | 550 | ||
| Rated frequency | Hz | 50/60 | |||
| Rated current | A | 4000 | 6300 | ||
| Rated short-circuit breaking current | kA | 50 | 63 | ||
| Rated short-time withstand current (r.m.s) | kA | 50 | 63 | ||
| Rated duration of short-circuit | s | 3 | 3 | ||
| Rated peak withstand current | kA | 125 | 171 | ||
| Rated short-duration power-frequency withstand voltage (1 min r.m.s) | Phase-to-earth | kV | 460 | 740 | |
| Across the insolating distance | kV | 460+145 | 740+315 | ||
| Rated lightning impulse withstand voltage(peak) | Phase-to-earth | kV | 1050 | 1675 | |
| Across the insolating distance | kV | 1050+26 | 1675+450 | ||
| SF6 gas pressure at 20°c | Circuit breaker | Rated pressure | MPa | 0.62 | |
| Alarm pressure | Mpa | 0.58 | |||
| Lockout pressure | MPa | 0.53 | |||
| Other | Rated pressure | MPa | 0.58 | ||
| First alarm pressure | MPa | 0.53 | |||
| Second alarm pressure | MPa | 0.50 | |||
| Partial discharge at 80% power frequency withstand voltage | Total bay | pC | 5 | ||
| insulator | pC | 3 | |||
| The times of Rated short circuit making current (FES) | Times | 2 | |||
| Mechanical endurance | Circuit breaker | Times | 10000 | ||
| DES/FES | Times | 5000 | |||
| Moisture content of SF6 gas | Circuit breaker compartment | commissioning | μL/L | ≤150 | |
| operation | μL/L | ≤ 250 | |||
| Other compartment | commissioning | μL/L | ≤ 300 | ||
| operation | μL/L | ≤ 500 | |||
| Leakage rate of SF6 gas per year | ≤ 0.3% | ||||
252kV,550kV Gas Insulated Switchgear (GIS)