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FIPTMV Medium Voltage Technology. SFG Top Unit. Main applications of the SFG. The SFG is a standard component in the Uniswitch MV switchgear worldwide. ...up to 24kV. ...up to 1250A. ...up to 25kA. Uniswitch construction. 1) Busbar compartment 2) The SFG switch disconnector

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FIPTMV Medium Voltage Technology


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main applications of the sfg
Main applications of the SFG
  • The SFG is a standard component in the Uniswitch MV switchgear worldwide

...up to 24kV

...up to 1250A

...up to 25kA

uniswitch construction
Uniswitch construction

1) Busbar compartment

2) The SFG switch disconnector

3) Cable compartment

4) Operating device, interlocking device and low voltage compartment

the sfg topunit
The SFG TopUnit
  • 3-position indoor switch disconnector
  • Extremely durable operating device with optional tripping and motor operation
  • Epoxy resin enclosure with inspection windows
the sfg topunit at a glance
The SFG TopUnit at a glance
  • A compact SF6 -gas insulated indoor switch disconnector
  • Rated voltage 12-24 kV
  • Rated current 630-800 A
  • SFG TopUnit dimensions:
    • Length: 835 mm
    • Width: 375 and 500 mm
    • Weight: about 40 kg
  • 3 positions: closed - open - earth
sfg construction
SFG Construction
  • Gas compartment is sealed for life (EN 50187)
  • 3 positions: closed - open - earth
  • 2 windows for visual position inspection
  • Earthing switch with full making capacity
  • Magnetic blow type arc eliminator
  • Integrated capacitive divider for voltage indication
sfg top unit features
SFG TOP UNIT - features
  • Safety: Made to highest IEC standards, non corrosive leak proof enclosure, inspection windows, integrated voltage indicator, interlocking device, gas gauge, etc.
  • Economy: A life span of minimum 30 years, sealed for life, low maintenance costs
  • Reliability: Stringent testing of each unit, extremely durable and reliable actuator, worldwide use, etc.
  • Smart integration: Modular construction, compact size, easy installation, one switch - many applications
sfg topunit inspection windows
SFG TopUnit - Inspection windows
  • Provides the possibility to visually check the switch position
sfg topunit single spring mechanism
SFG TopUnit - Single spring mechanism
  • Compact, economical and durable construction
    • Minimum number of parts
    • Sealed for life
    • Stainless steel and aluminium
  • Three positions in one device
  • 1 operation shaft as standard, 2 shafts as an option
  • Optional motor operating device
  • Patented position indicator
  • Easy to install
sfg topunit double spring mechanism
SFG TopUnit - Double spring mechanism
  • Fuse tripping function. Trip coil and emergency pushbutton as option
  • Compact, economical and durable construction
  • Three positions in one device
  • 1 operation shaft as standard, 2 shafts as an option
  • Motor operating device as a build-on option
  • Patented position indicator
  • Easy to install
sfg topunit accessories
SFG TopUnit - Accessories
  • Operating mechanism:
    • 1-spring or 2-spring
    • manual or motorized operation
    • 1 or 2 operating shafts
  • Remote control
  • Key interlocking device
  • Gas pressure gauge
  • Fuse base and tripping
  • Mechanical position indication
  • Etc.
sfg topunit ratings
SFG TopUnit - Ratings
  • Rated voltage (kV) 12 17,5 24
  • Rated lightning impulse withstand voltage, BIL
    • common value (kV) 75 95 125
    • across the isolating distance (kV) 85 110 145
  • Rated short-duration power-frequencywithstand voltage
    • common value (kV) 28 38 50
    • across the isolating distance (kV) 32 45 50
  • Rated current (A) 800 800 630
  • Mainly active load breaking current
    • 100 CO operations (A) 800 800 630
  • Making capacity (3-times) (kA) 62,5 50 50
  • Short circuit current, 3s (kA) 25 20 20
  • Breaking capacity, IEC 60265-1 (A) 1530 1260 920
  • Max fuse (A) 125 100 80
  • Mechanical endurance of switch (c/o) 5000 5000 5000
  • Mechanical endurance of earthing (c/o) 1000 1000 1000
  • Rated filling pressure (gauge) (bar) 0.4 0.4 0.4