reinsulation of vacuum contactor 400 amps 3.3/6.6 kv for ekg shovel type vacuum contactor 3ad400-85-775a c4-400 amps, 6000v, 3 phase switch type v-53 control supply 2.5 251 dc v fitted for ekg shovel 473 at nak ocp of govindpur area-3, bccl.
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