Siemens NXAIR M - Access to Compartments; Opening or Closing the High-Voltage Door; Racking the Withdrawable Disconnector Link

Operating the disconnecting panel
74 NXAIR M 139-2021.9 / 07
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:
Type of accessibility:
Switching-device compartment
Interlock-controlled
Busbar compartment
Tool-based
Connection compartment
Access from the front side
Interlock-controlled and tool-based
Access from the rear side
Tool-based
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
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.