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3 Description
The two interrupter units provide a double-break feature per pole, the grading capacitors ensuring uniform voltage
distribution.
The double break assembly and the insulator column are filled with SF
6
for arc-quenching and insulating
purposes.
The density of the SF
6
gas for each circuit-breaker pole is monitored by a density monitor and the gas pressure
indicated by a manometer.
The energy required for switching is stored in one closing spring and one opening spring. The closing and
opening springs are located in the operating mechanism unit.
Control cabinet 12, which is attached to circuit-breaker pole B, contains the equipment for controlling and mon-
itoring the circuit-breaker and the terminal blocks required for the electrical connection. SF
6
gas is monitored
single-poled in the operating mechanism cabinet.
There are cables for electrical coupling of the control with the three operating mechanism.
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