73
4 Installation
4.8
Carrying Out Test Operations
When installation work is finished, the circuit-breaker is in the OPEN position. The closing spring of the operating
mechanism is not charged. See section 3.7
Function of the Spring Drive Mechanism
When the motor control power supplies are switched on, the charging motors automatically start up and stop
again when the closing spring has been charged and latched. The operating mechanism is now ready for a
closing operation.
WARNING
Blocking of the circuit-breaker is possible.
Before the start of a test run it is essential to check that the bolts 10.9 are inserted in the breaker
position 2 and secured (Fig. 56)
A Operation
position
B Marking
position
10.9 Bolt
15.9 Lever
Fig. 56
Coupling point on corner gear
WARNING
Danger of bursting if porcelain bodies are damaged. Severe personal injury can result.
For safety reasons no persons may remain within 60 m of the circuit-breaker while the first 5
test operations are being carried out.
