ltem | Unit | Techincal parameter |
Rated voltage | kV | 40.5 |
Insulating medium | | SF6 |
Rated frequency | Hz | 50/60 |
Rated current | A | 630 |
Temperature rise test current | | 1.1Ir |
Rated power frequency 1min withstand voltage (relative) | kV | 95 |
Peak rated lightning impulse withstand voltage (1.2/50ms) (relative) | kV | 185 |
Rated short-time withstand current and duration | kA/s | 20/25/4 |
Rated peak withstand current | kA | 50/63 |
Duration of ignition | s | 1 |
Short-time power frequency withstand voltage of auxiliary and control circuits | kV | 2 |
Class of protection | Cabinet housing | | IP4X |
compartment | | IP2X |
SF6 gas rated pressure (20ºC gauge pressure) | bar | 1.45 |
Annual leakage rate of SF6 gas | | ≤0.01% |