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7.4 Front panel of Bus-section unit
The bus-section unit consists of two indivisible
modules with following main elements:
1. left module: one three-position disconnector (Ds)
and one circuit-breaker (E)
2. right module: one three-position disconnector (Dd).
Both three-position disconnectors are mechanically
interlocked together and with the circuit-breaker in
order to prevent their operation when the circuit-
breaker is closed and to prevent the circuit-breaker
being operated when either selector is in use. The
selector and circuit-breaker status is indicated on the
front panel of the unit.
Figure 105: Front panel of Bus-section unit.
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