Overview
LW Series self-energy SF6 Circuit Breaker is a three-pole/single-pole AC 50Hz/60Hz outdoor high voltage power transmission equipment for the division of the rated current, fault current or conversion lines, transmission and distribution system for protection, control and operation can be opening, closing and fast automatic reclosing operation.
The circuit breaker using the latest design principles, has a simple structure, small size, low supplies, the energy needed to operate a small, high reliability, easy installation, low noise characteristics.
The circuit breaker using the latest design principles, has a simple structure, small size, low supplies, the energy needed to operate a small, high reliability, easy installation, low noise characteristics.
Operating Conditions
1. Altitude: ≤ 3000 meters
2. The environment temperature: upper limit +50℃, lower limit -40℃
3. Wind pressure: < 700pa
4. Daily average ambient air relative humidity ≤ 95%, on average ≤ 90%
5. Earthquake intensity: not more than 9 degrees
6. Air Contamination: Ⅲ grade.
Technical Data
| Item | Unit | Parameter | ||||
| Rated voltage | kV | 72.5 | 126 | 145 | 220 | |
| Rated frequency | Hz | 50/60 | ||||
| Rated current | A | 1600~4000 | 3150~4000 | |||
| Rated short-circuit breaking current | kA | 25~40 | 40~63 | |||
| Rated short-circuit breaking current(peak) | 63~100 | 100~157.5 | ||||
| Rated out-of-phase breaking current | 10 | |||||
| Rated cable(line) charging breaking current | 10 | 31.5 | 50 | 125 | ||
| Rated gas pressure | Mpa | 0.4 | 0.5 | 0.6 | ||
| Rated insulation level | 1min power frequency withstand voltage | kV | 140 | 230 | 265 | 460 |
| Rated lightning impulse withstand voltage (peak) | 325 | 550 | 650 | 1050 | ||
| Rated operating sequence | / | O-0.3s-CO-180s-CO | ||||
| SF6 gas leakage rate(per year) | ≤1% | |||||
| First of several genes | 1.5 | 1.55 | 1.5 | 1.3 | ||
| Main loop resistance | μΩ | ≤40 | ≤45 | ≤50 | ||
| Heater voltage | V | AC220 | ||||
| Control circuit and signal circuit voltage | DC220,DC230 | |||||
| Motor voltage | DC220,DC230 | |||||
