Ring Main Unit | Industrial Transformers

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Ring Main Unit (RMU), Series XGN15-12

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Dry Type Transformer
1. Dry Type Transformers, Series SG(B)10
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Oil Immersed Transformers
1. Oil Immersed Transformers,Series S11
2. On Load Tap Changer，Series S11
Medium Voltage Switchgear
1. Secondary Switchgear，Series KYN28A-12
2. Ring Main Unit(RMU),Series XGN15-12
Unit Substation
1. Pad-mounted Transformer
2. Prefabricated Substations

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Ring Main Unit (RMU), Series XGN15-12

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

Item	Data
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

Guangdong Shengte Electric Co. was established in 2008 in the Nanhai District of Foshan City. We are a manufacturer focused on the production of power distribution equipment as well as high and low voltage electrical equipment. We have always been committed to low-carbon, environmentally friendly and energy saving power transmission and distribution solutions for an industry that desperately needs them.