Body made of galvanized steel, hot-dip galvanizing;
insulated contact part of the circuit breaker (closing of the plug-in power connectors of the withdrawable element occurs in the insulating pipe), which completely excludes phase-to-phase short circuit;
post and bushing insulators are made of epoxy resin-based composite ceramics;
the cubicle consists of 4 solid compartments (busbar compartment; relay compartment; current transformer compartment; circuit breaker compartment), each of which has its own exhaust valve to relieve excess pressure.
the depth of the VM-4 cabinets is constant for all primary circuits, for a different number of power cables and does not depend on the rated current of the cell and the breaking current.
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