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FIPTMV Medium VoltageTechnology

SFG Top Unit

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Main applications of the SFG

The SFG is a standard component in the Uniswitch MV switchgear worldwide

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Uniswitch construction

1) Busbar compartment

2) The SFG switch disconnector

3) Cable compartment

4) Operating device, interlocking device and low voltage compartment

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The SFG TopUnit

3-position indoor switch disconnector

Extremely durable operating device with optional tripping and motor operation

Epoxy resin enclosure with inspection windows

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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

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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

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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

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SFG TopUnit - Inspection windows

Provides the possibility to visually check the switch position

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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

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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

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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.

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SFG TopUnit - Ratings

Rated voltage (kV) 12 17,5 24Rated lightning impulse withstand voltage, BIL

– common value (kV) 75 95125

– across the isolating distance (kV) 85 110145

Rated short-duration power-frequencywithstand voltage

– common value (kV) 28 3850

– across the isolating distance (kV) 32 4550

Rated current (A) 800 800 630Mainly active load breaking current

–100 CO operations (A) 800 800630

Making capacity (3-times) (kA) 62,5 50 50Short circuit current, 3s (kA) 25 20 20Breaking capacity, IEC 60265-1 (A) 1530 1260 920Max fuse (A) 125 100 80Mechanical endurance of switch (c/o) 5000 5000 5000Mechanical endurance of earthing (c/o) 1000 1000 1000Rated filling pressure (gauge) (bar) 0.4 0.4 0.4