Ring Main Unit (RMU), Series XGN15-12

Ring Main Unit (RMU), Series XGN15-12
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Series XGN15-12 ring main units (RMU) are 3-phase AC 12kV, 50Hz, main and branch busbar series indoor power distribution devices. They are widely used in load center substations and box type substations in factories, residential areas and high-rise buildings to control and protect power systems. This equipment series is equipped with SF6 load break switches, and when compared to other similar products, feature a better insulation and arc quenching performance, ensuring the short circuit breaker and improved safety levels, thus guaranteeing a safe, reliable performance.

Technical parameters
Project Unit Data
Rated voltage KV 12
Rated frequency HZ 50
Rated current A 630
Maximum fuse current A 125
Rated short-time withstand Current KA 25
Rated duration of short circuit S 4
Rated peak withstand current KA 63
Rated short-circuit making current KA 63
Rated active load breaking current A 630
Closed loop breaking current A 630
Rated cable charging current A 10
Main circuit resistance μΩ ≤ 150
Transfer current A 1700
Rated short circuit breaking current KA 50
Main loop resistance (without fuse) Μω ≤ 250
Earthing switch rated short time withstand current KA 25
Earthing switch rated duration of short-circuit S 3
Earthing switch rated peak withstand current KA 63
Protection class
IP3X
Working conditions
ItemData
Ambient temperature -10℃- +40℃
Ambient humidity Daily average humidity≤2.2x10-3MPa
Altitude ≤1000m
Others Seismic intensity: ≤ magnitude 8; the place without fire and explosion danger, serious pollution, chemical corrosion and strenuous vibration
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