Operation
9229 0025 176 0A
57
2019-08-05
Operation
Commissioning
Before commissioning, check the following points to ensure that the vacuum circuit-
breaker is functioning faultlessly at operating temperature:
DANGER
High voltage - danger to life!
Touching live parts causes an electric shock.
• Check through all of the items on the checklist and ensure correct functioning
before commissioning.
• Do not touch live parts!
• Ensure that the vacuum circuit-breaker is operated only by qualified person-
nel who are familiar with the operating instructions and who observe the
warning notices.
CAUTION
Increased noise levels due to switching noise
Temporary noise levels above 85 dB (A) can cause damage to health.
Wear suitable ear protection.
Checklist
Notes
Does the information on the name plate (see page 31) match the order
data?
Ensure correct operating voltage.
Is the ambient air temperature at least -5 °C / 23 °F (with addition A40 to -
25 °C / -13 °F)?
If necessary, clean the vacuum circuit-breaker (details on this in section
“Cleaning” on page 61).
Check that bolted joints are tightened securely.
Check the plug-in connection of the connector strip for firm seat.
If necessary, check and adjust the customer's devices.
If there is a closing lock: Is closing unlocked accordingly?
Test operation without supply voltage
Charge the closing spring with the hand crank (see Fig. 94), then press
the CLOSE pushbutton and, once closing has been performed, press the
OPEN pushbutton.
Test operation with supply voltage
To perform test switching with the motor, switch on the supply voltage.
The motor starts up immediately and charges the closing spring. Check
the indicator for charge state of the closing spring (mechanically and elec-
trically).