DC Range

The Ferranti Tapchanger (tap changer) Limited DC3 On-Load Tap Changing Gear is a three phase, high speed resistor transition tap changer for 33kV insulation class transformers, which can be used in either 'Star' or 'Delta' operation at a maximum full line current of 300 amps. on normal tappings

Principal of Operation
Three single phase diverter switches of the high speed transition variety using resistors for bridging between running positions during the tap change, are mounted in a separate compartment on top of the selector switches, and a hinged cover to the diverter switch compartment replaces the usual drop tan to give easier accessibility. read more....

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