40.5kV (SF6 Upper Isolation) Ring Main Unit
The 40.5kV (SF6 Upper Isolation) ring main unit is designed for 40.5kV systems with SF6 gas insulation and a three-position busbar side scheme. The product is primarily used in ring network power supply for new energy applications (40.5kV wind power, photovoltaic prefabricated substations, offshore wind power units, compact underground substations, and integrated boosting equipment for energy storage). It is particularly suitable for harsh environments such as high altitudes, humid areas, salt spray, and sandy or dusty conditions.
Main Technical Features:
Vacuum arc extinction, SF6 insulation.
Three-position switch on the busbar side, offering flexible and versatile schemes with strong expandability, allowing left, right, or top expansion.
Direct-acting three-position switch with reliable connection, stable alignment performance, and excellent dynamic and thermal stability.
Superior insulation performance, meeting all insulation requirements at zero gauge pressure.
Excellent airtight performance with advanced process control, laser welding, and helium leak detection, achieving an annual gas leakage rate of ≤ 0.01%.
Long mechanical life: circuit breaker 10,000 operations, three-position switch 3,000 operations.
Gas tank protection rating of IP67, with the high-voltage circuit sealed in the gas tank, unaffected by the environment, particularly suitable for humid, salt spray, and sandy or dusty conditions.
