Access To Compartments; Opening Or Closing The High-Voltage Door; Racking The Withdrawable Disconnector Link / Disconnector Truck - Siemens NXAIR Operating Instructions Manual

11.3 Access to compartments

Regarding accessibility to the individual compartments, NXAIR switchgear fulfills the loss of service
continuity category LSC 2B according to IEC 62271-200.
The degree of protection between the individual compartments is IP2X.
The type of accessibility is provided as follows:
Compartment
Switching-device compartment
Voltage transformer compartment
Busbar compartment
Access from the front side
Connection
compartment
Access from the rear side

11.4 Opening or closing the high-voltage door

The procedure for opening and/or closing the high-voltage door at the disconnecting panel is identical with
the procedure for opening and/or closing the high-voltage door at the circuit-breaker panel.
For opening and/or closing the high-voltage door at the disconnecting panel,
see chapter 10.4 and/or 10.5.

11.5 Racking the withdrawable disconnector link / disconnector truck

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WARNING
Injury due to effects of high-voltage
Racking the withdrawable disconnector link / disconnector truck while busbar
system and feeder are under operational high-voltage can cause serious damages
which may result in:
•
Lightning
•
Heat
•
Loud noise
•
Vibration
Never rack the withdrawable disconnector link / disconnector truck while
the busbar system and feeder are under operational high-voltage.
Get authorization from control station before racking the withdrawable
disconnector link / disconnector truck.
To release access
link / disconnector truck, release the interlocking.
NXAIR / ≤ 40 kA
Operating the disconnecting panel
Type of accessibility
Interlock-controlled
Tool-based
Tool-based
Interlock-controlled and tool-based
Tool-based
for racking the withdrawable disconnector
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