Answer / m.gopinath

SDF=Switch Disconnctor Fuse Unit

Answer / shy11am

S.D.F Stand for 'SWITCH Disconnector Fuse' Unit with
Tripple pole neutral(R,Y,B,N).

it provide more safety compare to general fuse unit.

Answer / harish shukla

S.D.F. stands for SWITCH Disconnector Fuse Unit

Answer / arif mohiuddin

SDF Stands for switch fuse disconnector.

Answer / k.p.sharma

SDF=Switch Disconnctor Fuse Unit
SFU=Switch Fuse Unit

Answer / diwana

S.D.F = SWITCH Dis-connector Fuse

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