XGN□-12 SF6-Insulated Ring Main Unit Switchgear

XGN□-12 SF6-insulated Ring Main Unit Switchgear

• Specification
• Technical Parameters
• Drawing
• Types

• XGN□-12 SF6-insulated Ring Main Unit Switchgear

  XGN□-12 SF6-insulated ring main unit switchgear is widely used in 10kV/6K power distribution system, which is a preferred product for urban and rural user transformer system.
  The switchgear is module unit mode, which could be combined based on different usage. It is divided into fixed unit combination and extention unit combination, which would satisfy the need of different substations for flexibility usage of compact switchgear.
  The switchgear is a completely sealed system with a stainless steel tank containing all the live parts and switching functions. A sealed steel tank with constant atmospheric conditions ensures a high level of reliability as well as personnel safety and a virtually maintenance-free system.
  The switchgear is divided into non-extention standard configuration and extention standard configuration. It has combination and self-extension for full module and semi module, which gives special flexibility of usage.
  It is according to GB standard with mechanical life over 30 years under indoor conditions (20 degree Celcius).

  Main features

  1. XGN□-12 uses SF6 gas as extinguishing arc and insulation medium.
  2. It is a completely sealed and insulation system with a stainless steel tank containing all the live parts and switching functions. A sealed steel tank filled with 1.4bar SF6 gas can reach IP67 protection level. The whole switchgear device is with constant atmospheric conditions which ensures a high level of reliability as well as personnel safety and a virtually maintenance-free system.
  3. The switchgear has reliable safety pressure relief arrangement, which ensures the personnel safety even under extreme conditions.
  4. It has fixed unit combination and extendible unit combination.
  5. The inlet and outlet are normally designed in the front side of the switchgear, but it can be provided with side outlet or side extension.
  6. It is easy to install and suitable in narrow place in bad environment condition.
  7. It can be supplied with motor, remote contral and monitoring unit based on the customer’s request.

  Normal ambient condition

  1. Ambient air temperature is not exceeding 40 degree Celsius, the average value in 24 hours is not exceeding 35 degree Celsius, the lowest air temperature is not exceeding ﹣40 degree Celsius;
  2. Altitude≤2000m;
  3. Humidity
  Relative humidity: daily average value is not exceeding 95%, monthly average value is not exceeding 90%;
  Water vapor pressure: daily average value is not exceeding 2.2KPA, monthly average value is not exceeding 1.8KPA;
  4. Earthquake intensity: not over 8 degree, horizontal acceleration ≤0.4g, vertical acceleration≤0.5g;
  5. Special service conditions: the user should consult with the manufacturer when the switchgear is not under normal service conditions.

• Item	Unit	C module	F module	V module		CB module
  		Combination switch	Combination apparatus	Vacuum switch	Disconnecting/ earthing switch	Vacuum circuit breaker	Disconnecting/ earthing switch
  Rated voltage	kV	12	12	12	12	12	12
  Rated frequency	Hz	50	50	50	50	50	50
  Power frequency withstand voltage (interphase/fracture)	kV	42/48	42/48	42/48	42/48	42/48	42/48
  Lightning impulse withstand voltage	kV	75/85	75/85	75/85	75/85	75/85	75/85
  Rated current	A	630	*	630		1250/630
  Rated closed loop breaking current	A	630
  Rated cable charged breaking current	A	135/135
  Rated short-circuit making curemt(peak)	A	50	80
  Rated peak withstand current	ka	50
  Rated short time withstand current	ka/3s	20
  Rated short circuit breaking current	ka		31.5	20		25
  Rated transfer current	A		1750
  Maximum current with fuse	A	–	125
  Loop resistance	N	≤300	≤600
  Mechanical life	Times	5000	3000	5000	2000	5000	5000

  *Depends on fuse rated current value.

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• Various Non-extension Standard Combination Cabinet

  

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