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

Operating the disconnecting panel

11.3 Access to compartments

Regarding accessibility to the individual compartments, NXAIR M 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 in standard design.
The type of accessibility is provided as follows:
Compartment:
Switching-device compartment
Busbar compartment
Connection compartment

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

74
Access from the front side
Access from the rear side
WARNING
Injury due to effects of high-voltage
Racking the withdrawable disconnector link 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 while the busbar system
and feeder are under operational high-voltage.
Get authorization from control station before racking the withdrawable
disconnector link.
To release access for racking the withdrawable disconnector link, release
the interlocking.
Type of accessibility:
Interlock-controlled
Tool-based
Interlock-controlled and tool-based
Tool-based
NXAIR M 139-2021.9 / 07