High-voltage Switch
LW57-252 type tank sulfur hexafluoride circuit breakers, is my company developed a new type of high voltage circuit breakers. It uses an advanced interrupter design, equipped with the most advanced German ABB HMB-2.8-type hydraulic spring operating mechanism to achieve the structural miniaturization, with domestic similar products, compared the original, significantly improves the electrical products and mechanical properties. The product has reliable performance, advanced technology, compact structure, small operation power, good seismic performance and many other advantages, to achieve the advanced level of similar products.
Breaker can be operated independently by the three-pole and a HSBC cabinet. Each pole circuit breaker equipped with a flat-HMB-2.8-type hydraulic spring operating mechanism, may operate a unipolar or three-pole electrical linkage operation.
| Item | Parameter | ||
| Rated voltage kV | 252 | ||
| Frequency Hz | 50 | ||
| Rated Insulation Level | 1min power frequency withstand voltage （r.m.s）kV | Phase to earth/Phase to Phase | 460 |
| Across the isolating gap | 460+145 | ||
| Rated lightning impulse withstand voltage (peak) kV | Phase to earth/Phase to Phase | 1050 | |
Across the isolating gap | 1050+200 | ||
| Rated current A | 2000, 3150, 4000 | ||
| Rated short circuit breaking current kA | 50 | ||
| Rated short circuit making current (peak) kA | 125 | ||
| Short Line fault breaking current kA | 37.5 / 45 | ||
| Rated line charging breaking current A | 125 | ||
| Rated out of phase breaking current kA | 12.5 | ||
| Rated short time withstand current kA | 50 | ||
| Rated short circuit duration s | 3 | ||
| Rated peak withstand current kA | 125 | ||
| N Rated static terminal Rally | Horizontal longitudinal force | 1500 | |
| Vertical lateral force | 1000 | ||
| Vertical direction | 1250 | ||
| Rated SF6 gas pressure(20℃ gauge pressure) MPa | 0.6 | ||
| Rated operating sequence | O-0.3s-CO-180s-CO | ||
| Yearly leakage rate of SF6 %/ | 0.5 | ||
| Moisture content of SF6 μL/L | 150 | ||
| Mechanical endurance Time | 5000 | ||
| product weight kg | 5900 | ||
The use of advanced single fracture structure, small mixed compression interrupter, interrupter ability, small operation power, is currently the smallest tank breaker operating functions.
Unipolar breaker equipped with the most advanced German ABB HMB-2.8-type hydraulic spring mechanism. Actuator uses a modular design, compact structure, smooth transmission, low operating noise. Because the actuator uses an advanced hydraulic damping system, effectively reducing the wear and tear of the operating system, it is possible to adapt to frequent mechanical operation.
Self-type contact: contact points, good conductivity, strong ability to withstand short-circuit current.
High-performance insulated rod: has a very high electric strength and excellent resistance to mechanical operating shock resistance.
Product Name: LW57-252 Tank Sulfur Hexafluoride Breaker
