Medium Voltage RMU SF6 Load Break Switch 10kV 630A For Incoming Line

Medium Voltage RMU SF6 Load Break Switch 10kV 630A For Incoming Line

• Specification
• Technical Parameters
• Structure

• FLN36-12kV SF6 load break switch is a switch equipment for medium voltage switchgear, using SF6 gas as arc extinguishing and insulating medium. There are three working positions: open, closed, earth position in the switch. The compact size, easy installation, and fine adaptability to environment make the switch suitable for many different applications.
  It can be divided into two types: FLN36-12D ( K type single spring operating mechanism ), FLRN 36-12D (A type double spring operating mechanism). The latter type could be equipped with fuse combination, having control and protecting function, which can be used for power supply and substation as a protecting and control device, especially suitable for ring main unit, cable distribution box and switching substation.

  Basic functions and features
  1. Load breaker switch adapts double fracture, rotary movable contact structure, with the following three kinds of operating states: Closing, opening, earthing.
  2. Using SF6 gas as an arc extinguishing and insulating medium, the main circuit seals by the upper and lower housing pouring epoxy resin, the conductive function is unaffected by external influences.
  3. Good safety performance. If internal arcing occurs, the housing has an internal structure weak point, it will be rushed to open, followed by the cabinet above the shutter release arc red open air overpressure stream-oriented outside the cabinet, ensure that the switch cabinet security checks.
  4. Load breaker switch sets gates, opening, earthing switch three at one, filled with SF6 gas encapsulated in epoxy resin housing, three-position interlock,compact structure,high security and reliability.
  5. Small size, light weight, maintenance-free, easy and safe to operate.

  Normal working Environment

  1. Altitude: ≤1000m
  2. Ambient temperature at -30ºC to +40ºC, the daily average temperature should not more than 30ºC.
  3. The daily average of relative humidity is less than 95%, the average monthly is less than 90%.
  4. Working environment should be without steam, gas, chemical corrosive deposition, salt fog, dust, dirt and other dangerous explosive media, which will severely impact on insulation and conductivity of products.
  5. Working environment should not be regular vibration or serious bumps.
  PS: Products with special requirements, specifications and dimensions that need to be improved can be designed and manufactured according to user requirements.

• Medium Voltage RMU SF6 Load Break Switch 10kV 630A For Incoming Line Technical Parameters

  Item	Unit	Data
  		FLN36-12D/T630-20 Load break switch	FLRN36-12D/125-50 LBS + Fuse-combination units
  Rated voltage	kV	12	12
  Rated frequency	Hz	50	50
  Rated current	A	630	125
  Short-duration(1min) power frequency withstand voltage	kV	42	42
  Lightning impulse withstand voltage	kV	75	75
  Rated power frequency withstand voltage(5min)	kV	24	24
  Rated short-time withstand current(Load break switch/3s)	kA	20	20
  Rated short-time withstand current(Earthing switch/2s)	kA	20	20
  Rated peak withstand current(Load break switch)	kA	50	50
  Rated peak withstand current(Earthing switch)	kA	50	50
  Rated short-circuit making current(Load break switch)	kA	50	125
  Rated short-circuit making current(Earthing switch)	kA	50	50
  Rated closed-loop dropout current	A	630
  Rated active load breaking current	A	630
  Rated cable-charging breaking current	A	10	10
  Rated short-circuit breaking current	kA		50*
  Rated transfer current	A		1750*
  Fuse type			XRNT-12kV/125A*
  Fuse impact output energy	J		1±0.5
  Mechanical endurance LBS/Earthing switch	Time	5000/2000	5000
  Air insulation distance of charged body and ground	mm	≥ 125	≥ 125
  SF6 Gas pressure(Relative pressure at 20℃ )	bar	0.4	0.4
  Opening and Closing simultaneity	ms	≤ 2	≤ 2
  Main circuit resistance	μΩ	≤ 65	≤ 65

   

• SF6 load break switch structure