Samata Electricals Private Limited

Bottom tank and oil expansion chamber are made of M.S. Sheet. All tanks and chambers are painted with Oven baked paint, after clearing by seven tank process.
All surfaces which come in contact with oil are painted with oil insoluble paint. M.S. parts can be hot dip galvanised on request.

C.R.G.O. Silicon Steel is used for building up Electromagnetic core. Shell type construction is used to minimise leakage reactance.

RESIDUAL VOLTAGE TRANSFORMER is used to detect unbalanced voltage in three phase system and to supply voltage to directional earth-fault relay.
For directional earth-fault relay, it is necessary that the voltage applied to voltage coil of the relay corresponds in phase to that of the current in current coil. Such voltage will be the Residual voltage of the system and will be the phasor sum of the three line-to-earth voltages.
Residual voltage can be achieved by connecting secondaries of three single phase V.Ts connected in three different phase, in open-delta fashion. It is however, economical to use three phase V.Ts instead of Three nos. single phase V.Ts 'SE' manufactures three phase P.V.Ts suitable upto 33kv system voltage.