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Deba Ningbo is your partner in the protection
of medium voltage networks

Home » Products » DF-3



DF-3: Metal Enclosed – AIS

The modular and extensible solution

Safety, usability and care of the environment are key factors in the choice of medium voltage installations. To meet such needs, SGC – SwitchGear Company has a compact, extendable medium voltage concept, the DF-3, developed with the three positions three phase load break switch of the type RV53, and associated mechanical drives.

Advantages

  • Manufactured and developed according to the ISO 9001 standards
  • Reduced dimensions, almost equivalent to the full compact SF6 insulated design  (h x w x d – 1500 mm x 375 (500) mm x 900 mm)
  • Extensively tested in factory environment
  • Spring operated mechanical drive allowing several options for Scada applications as well as remote control
  • Strong construction in galvanized steel
  • Reduced installation time and easy extension possibilities
  • Conventional cable connections
  • Optional internal arc limitation device “Arc-Killer” for rated insulation up to 17.5 kV
  • Super simple access to the components of the cable compartment
  • User friendly, reliable and safe for the operator
  • Maintenance-free

Technical Specifications

Rated voltage kV 12 17,5 24
Impulse withstand voltage 1.2 / 50 µs
– to earth and between phases kV 75 95 125
– over the insulating distance kV 85 110 145
Power frequency withstand voltage (1 min.)
– to earth and between phases kV 28 38 50
– over the insulating distance kV 32 45 60
Rated frequency Hz 50/60 50/60 50/60
Rated current A 630 630 630
Rated short circuit current 1s. kA 20 20 20
Rated peak value of the short circuit current kA 50 50 50
Breaking capacity RV53 (IEC 62271-103)
– rated current A 630 630 630
– closed loop A 630 630 630
– cable charging current A 10 10 16
– making current kA 50 50 50
– earth fault A 100 100 100
– earth fault cable charging A 30 30 30
– internal arc 1 sec. (6 criterias) kA 14 14 14
Degree of protection IP4X
Mechanical endurance c/o 1000
Standards IEC 62271-100, IEC 62271-1, 62271-102,-103, -105, 62271-200 and IEC 61243-5
Certificats KEMA/IPH

Any questions?

Feel free to contact us for more information!

Yun Wang
Yun WangPlant Manager
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brochure DF-3

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