54
F
Pillar Flange Plate
11 Breaker
base
Fig. 32
Operating mechanism cabinet with base mounted on
pillar
4.5.7
Assembling the Insulator Column
The circuit-breaker poles are labelled LA, LB and LC on the double interrupter heads, the insulator columns and
the lower part of the circuit-breaker. Make sure the double interrupter heads and insulator columns are assigned
correctly to the circuit-breaker poles and check the last four digits in the serial number on the lower part of the
circuit-breaker when you install the circuit-breaker.
The insulator columns consisting of corner gears, insulators and operating rods are fully assembled at the factory.
The top openings on the insulator columns are sealed with a packaging cap for protection and to prevent
contamination during transport (Fig. 33).
