Opening The High-Voltage Door - Siemens NXAIR Operating Instructions Manual

10.4 Opening the high-voltage door

Preconditions
•
Withdrawable circuit-breaker / circuit-breaker truck in test position
•
Spring energy store in the circuit-breaker discharged
•
High-voltage door closed
•
Padlock (optional) removed from door handle
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WARNING
Reduced safety
The closed high-voltage door is an important safety element of the switchgear.
The high-voltage door is exclusively opened for performing operational activities
inside the switching-device compartment, such as removing or inserting a
withdrawable circuit-breaker / circuit-breaker truck.
Close the high-voltage door:
If an activity inside the switching-device compartment is interrupted.
Immediately after an activity inside the switching-device compartment was
completed.
Before leaving the panel front.
CAUTION
Injury
The mechanism inside the withdrawable circuit-breaker / circuit-breaker truck can
cause injuries by getting squeezed, caught or cut.
No maintenance or installation work on
withdrawable circuit-breakers / circuit-breaker trucks.
Do not undo or remove any bolts.
Do not remove any parts of the covering.
INFORMATION
Circuit-breaker panels with removable voltage transformers
have an extra door to the separate voltage transformer
compartment.
If the panel front shows this extra door, first read and
understand the information regarding the handling of the
removable voltage transformers; see chapter 19.
NXAIR / ≤ 40 kA
Operating the circuit-breaker panel
41