Zakład Wytwórczy Aparatów Elektrycznych Sp. z o.o.
7
During transportation, the poles must be secured against tipping over and the disconnector knife should be
closed. Disconnector can be transported by means of transport with open cargo area. Disconnectors poles
can be stored in an open space, but poles should be set so that the base frame does not stand directly on the
ground.
2. DESCRIPTION
2.1. Construction and principle of operation
The outdoor disconnector type Mark-40 is a three-column insulating switch with the secant movement of
contacts in the vertical plane, intended for work in networks with voltage depending on the version (123-420
kV) at frequencies up to and including 50 Hz. The disconnector can be used as a single-pole switch with an
individual operating mechanism. Disconnector’s poles can be set in parallel or in series. A visual sketch of
the Mark-40 disconnector pole with two earthing switches is presented below.
current path
supporting insulator
earthing switch (UN)
driving insulator
base frame
earthing switch (UR)
supporting structure
disconnector’s operating mechanism
earthing switch’s operating mechanism
