(57) A switch assembly for high-voltage electric power lines, comprising a supporting
base, which is supported by one or more supporting posts, and operating means for
actuating a line disconnection maneuver. The switch assembly also comprising on the
supporting base and arranged in two lateral rows and a central row:
- six insulating supporting columns, equally divided along the two lateral rows;
- three circuit breakers with a column insulator, mutually aligned along the central
row on a substantially vertical plane which is perpendicular to the supporting base,
a two-blade disconnector being associated with each one of the circuit breakers, a
first one of the blades having an end which is connected to the moving contact of
the circuit breaker and a second one of the blades having an end which is connected
to the fixed contacts of the circuit breaker, the circuit breaker and the two blades
associated therewith being rotatable together about the vertical axis of the circuit
breaker, for a possible line disconnection actuated by the actuation means; and
- instrument transformers.
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