High voltage SF6 circuit breakers LW36A(B)-126 are designed for networks and power supply systems of frequency 50 Hz
and voltage 110 kV.
LW36A (B)-126 are used as equipment for power supply system control and protection, separate grid connection
Circuit breaker is a construction based on three poles for outdoor installation placed on frame with legs. The use of spring mechanism requires minimal actuating energy.
LW36A(B)-126 construction:
1 Porcelain bushing
2 Base frame
3 Gas-weight controller
4 Control box
5 Nameplate
Technical data of LW36A(B)-126
| Parameter | Values | |
| Rated voltage [kV] | 126 | |
| One-minute withstand industrial frequency voltage [kV] | ground | 230 |
| actuation | 265 | |
| Storm impulse test voltage [kV] | ground | 550 |
| actuation | 630 | |
| Rated frequency [Hz] | 50 | |
| Rated current [A] | 2000/3150 | |
| Rated short-circuit current [kA] | 31,5/40 | |
| Short-time current [kA] | 80/100 | |
| Rated short-time thermal current, 4s [kA] | 31,5/40 | |
| Rated peak current [A] | 80/100 | |
| Rated operating sequence | O-0.3s-CO-180(20)s-CO | |
| Closing speed [ms] | 30+3 | |
| Opening speed [ms] | 75+8 | |
| Opening-closing time [ms] | ≤60 | |
| Primary circuit resistance [mkOm] | ≤40 | |
| SF6 rated pressure [mPa] | 0,6 (0,5) | |
| One-year SF6 leakage [%] | ≤1 | |
| Mechanical duration number | 6000 | |
| Weight [kg] | 1300 | |