DF-3(+), modular air insulated switchgear

The DF-3 system is a modular concept based on the “building blocks” principle, which means that cubicles are produced in series. As a result, the modular DF-3 concept meets the highest technical standards in a rational, economically sound way. The combination of cubicles is unlimited. Very complex diagrams of distribution and transformer switchgear can be compiled through this extensive spectrum of possibilities.

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Medium voltage switchgear, built to withstand severe conditions

Built to withstand severe conditions (new)

Our Arc-Killers extinguish an arc in 48 milleseconds

SGC nv SwitchGear Company’s patented SV-25 and SV-50 Arc-Killers takes safety to a new level. Not just the operator and the environment are shielded from harm, but the super-swift arc extinguishing system allows cubicles to be back in operation very quickly in case of an internal fault.

Our DF-3 line-up

DF-A - Incoming cubicle or cable field with load break switch RV53 and interlocked earthing switch.Supply cable connection.

Standard equipment

  • Triple-phase load break switch RV53, class E3 according to IEC 62271-103, SF6-insulation
  • Integrated interlocked earthing switch with making capacity up to 50 kA
  • Cable support
  • Door interlock
  • Sockets for capacitive voltage detector with parallel testing possibility
  • Low-voltage compartment

Options

  • Set of auxiliary contacts on load break switch
  • Set of auxiliary contacts on earthing switch
  • Key interlock on load break switch
  • Key interlock on earthingswitch
  • Key interlock on both
  • No door interlock
  • Motor operation: 24-48-110 V – DC of 110-220 V AC
  • Short-circuit indicator (to be specified by the customer when the order is placed)
  • Voltage indicators
  • Cubicle base: 200 mm, 300 mm or 400 mm height (Other dimensions on request)
  • Floor panels
  • Button press control
  • Remote control

Specifications and dimensions

Rated voltage kV 12 17,5 24
Rated current A 630 630 630
Short-term current kA 20 20 20
Time of the short duration of current s 1 1 1
Width mm 375/500 375/500 500
Depth mm 950 950 950
Height mm 1400 1400 1400
Height between bottom and end socket mm 790 790 790
Height between ground and cable support mm 310 310 310
Weight kg 115/140 115/140 140
IAC AFL 14 kA – 1s

DF-A+ - Incoming cubicle or cable field with load break switch RV53 and interlocked earthing switch with arc-killer and shaft.Supply cable connection.

Standard equipment

  • Triple-phase load break switch RV53, class E3 according to IEC 62271-103, SF6-insulation
  • Integrated interlocked earthing switch with making capacity up to 50 kA
  • Cable support
  • Door interlock
  • Sockets for capacitive voltage detector with parallel testing possibility
  • Low-voltage compartment
  • Arc-killer SV-53 built-in
  • Shaft at rear of the cubicle

Options

  • Set of auxiliary contacts on load break switch
  • Set of auxiliary contacts on earthing switch
  • Key interlock on load break switch
  • Key interlock on earthingswitch
  • Key interlock on both
  • No door interlock
  • Motor operation: 24-48-110 V – DC of 110-220 V AC
  • Short-circuit indicator (to be specified by the customer when the order is placed)
  • Voltage indicators
  • Cubicle base: 200 mm, 300 mm or 400 mm height (Other dimensions on request)
  • Floor panels
  • Button press control
  • Remote control

Specifications and dimensions

Rated voltage kV 12 17,5
Rated current A 630 630
Short-term current kA 20 20
Time of the short duration of current s 1 1
Width mm 375/500 375/500
Depth mm 950 950
Height mm 1400 1400
Height between bottom and end socket mm 760 760
Height between ground and cable support mm 310 310
Weight kg 115/140 115/140
IAC AFL 20 kA – 1s

DF-P - Transformer protection cubicle with load break switch/fuse combination.Transformer protection and MV-equipment protection.

Standard equipment

  • Triple-phase load break switch RV53, class E3 according to IEC 62271-105, SF6-insulation
  • Double earthing switch with mutual interlock
  • Socket for HRC fuses:
    • e = 292 mm DIN 10 at 17.5 kV
    • UTE
  • Door interlock
  • Socket for capacitive voltage detector
  • Low-voltage compartment
  • Three phase tripping in case of fuse trip

Options

  • Set of auxiliary contacts on load break switch
  • Set of auxiliary contacts on earthing switch
  • Key interlock on load break switch
  • Key interlock on the earthing switch
  • Key interlock on both
  • Shunt trip*
  • Under voltage release*
  • Closing release*
  • Motor operation*
  • HRC fuses and/or spare fuses
  • Contact “fuse blown”
  • Automatic recloser
  • Set of 2 or 3 voltage transformers
  • Voltage indicators
  • Cubicle base: 200 mm, 300 mm or 400 mm height (other dimensions on demand)
  • Floor panels
  • Button press control
  • Remote control

* available voltages: 24 V AC/DC, 48 V AC/DC, 110 V AC/DC, 220 V AC

Specifications and dimensions

Rated voltage kV 12 17,5 24
Rated current A 630 630 630
Short-term current kA 20 20 20
Time of the short duration of current s 1 1 1
Width mm 375/500 375/500 500
Depth mm 950 950 950
Height mm 1400 1400 1400
Height between ground and end socket mm 330 330 330
Fuse size mm 292 (DIN) 292 (DIN) 292(DIN)
Weight kg 134 134 134

DF-D - Protection cubicle with vacuum circuit breaker with integrated protection relay.Protection of descending feeders with circuit breaker, transformer and MV-equipment protection.

Standard equipment

  • Triple-phase load break switch RV44, class E3 according to IEC 62271-103, SF6-insulation
  • Vacuum circuit breaker with integrated protection relay, current transformers and open release
  • Interlocked earthing switch with rated making capacity up to 63 kA downstream of the capacity switch
  • Cable support
  • Door interlock
  • Sockets for capacitive voltage detector
  • Voltage indicators
  • LV compartment

Options

  • Set of auxiliary contacts on the load break switch
  • Set of auxiliary contacts on the earthing switch
  • Key interlock on load break switch
  • Key interlock on earthing switch
  • Key interlock on both
  • No door interlock
  • Motor operation on load break switch: 24-48-110 V AC/DC & 220 V AC
  • Short-circuit indicator (to be specified by the customer)
  • Earthing connections upwards from the circuit breaker
  • Circuit breaker SF6 insulated
  • Voltage indicators
  • Cubicle base: 200 mm, 300 mm or 400 mm height (other dimensions on demand)
  • Floor panels
  • Button press control on switch-disconnector
  • Remote control on switch-disconnector

Specifications and dimensions

Rated voltage kV 12 17,5 24
Rated current A 630 630 630
Short-term current kA 20 20 20
Time of the short duration of current s 1 1 1
Width mm 675 675 675
Depth mm 950 950 950
Height mm 1500 1500 1500
Height between ground and socket mm 360 360 360
Weight kg 460 460 460

Options on the circuit breaker

  • Motor operation*
  • Closing release
  • Shunt trip*
  • Under voltage release*
  • Set of auxiliary contacts
  • Error contact
  • Supply for test protective relay (battery block)
  • Switch counter
  • Automatic recloser
  • Button press control on circuit breaker
  • Remote control on circuit breaker
  • Key interlock

* available voltages: 24 V AC/DC, 48 V AC/DC, 110 V AC/DC, 220 V AC

Specifications to be indicated for circuit-breaker VA-2: Short-circuit capacity, rated current, rated voltage and capacity to be secured

DF-C-750 - Metering cubicle.The DF-C-750 cubicle has been designed for positioning current and voltage transformers to measure energy consumption.

Standard equipment

  • 3 Ti’s xA => 5A
  • 3 Tp’s xV => 110V, V3

Options

  • Additional current transformers
  • Additional voltage transformer with or without MV and LV protection
  • Support for the positioning of measuring transformers
  • Measuring system with 3 CTs and 3 VTs
  • Measuring system with kWh metering and Kvarh metering (requirements to be specified by the customer)
  • Current measurement system
  • Voltage measurement system
  • Cubicle base: 200 mm, 300 mm or 400 mm heigh (Other dimensions on demand)
  • Floor panels
  • Low voltage compartment safety box to secure voltage circuits

The following current transformer CT specifications will be specified by the customer: Primary current, secondary current, capacity and precision class, insulation class, rated short time current.

The following voltage transformer VT specifications will be specified by the customer: Primary voltage, secondary voltage, capacity and precision class, insulation class.

Specifications and dimensions

Rated voltage kV 12 17,5 24
Rated current A up to 630 up to 630 up to 630
Short-term current kA 20 20 20
Time of the short duration of current s 1 1 1
Width mm 750 750 750
Depth mm 950 950 950
Height mm 1400 1400 1400
Weight (*) kg 55 55 55

(*) Without equipment

Possible connections

  • Bottom left in – bottom right out
  • Bottom right in – bottom left out
  • Bottom left in – top right out
  • Bottom right in – top left out
  • Top right in – top left out
  • Top left in – top right out

DF-K - Cable cubicle and/or rail shaft.Cubicles of the DF-3 type equipped to bring in a supply cable. However, a DF-K cubicle can also contain a busbar and can be used as rising cubicle of the rail set.

Options

  • Holder for capacitive voltage indicators
  • Capacitive voltage indicators
  • Short-circuit detectors (to be specified by the customer when ordering)
  • Earthing switch
  • Set of auxiliary contacts on earthing switch
  • Key interlock on earthing switch
  • Earthing ball clamps
  • Current transformers in the busbar
  • Voltage transformers with of without protection in the busbar
  • Cubicle base: 200 mm, 300 mm of 400 mm height (other dimensions on demand)
  • Floor panels
  • Door interlock

Specifications and dimensions

Rated voltage kV 12 17,5 24
Rated current A up to 630 up to 630 up to 630
Short-term current kA up to 20 up to 20 up to 20
Time of the short duration of current s 1 1 1
Width mm M M M
Depth mm 950 950 950
Height mm 1400 1400 1400
Weight (*) kg 55 55 55

(*) without equipment / M stays for custom made