Position Indicators Visible On High-Voltage Door; Access To Compartments; Opening The High-Voltage Door - Siemens NXAIR Operating Instructions Manual

18.2 Position indicators visible on high-voltage door

Feeder earthing switch:
CLOSED position or OPEN position
Switch-fuse combination:
CLOSED position or OPEN position

18.3 Access to compartments

Regarding accessibility to the individual compartments, NXAIR switchgear fulfills the loss of service
continuity category LSC 2B but "switch-disconnector panel with HV HRC fuses fulfills the loss of service
continuity category LSC 2A; Partition class PI (shutter made of insulating material) 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:
Busbar compartment
Switching-device /
Access from the front side
connection
Access from the rear side
compartment

18.4 Opening the high-voltage door

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DANGER
Electric shock
If the busbars and cable / bar connections in the switchgear have not been
isolated, the contacts in the panel will be live at operational high-voltage.
Before opening the high-voltage door:
Isolate the busbars in the busbar compartment and the cable / bar
connections in the switching-device / connection compartment.
Do not open the high-voltage door at the switch-disconnector panel
unless the panel has been earthed.
Observe the Five Safety Rules.
Verify safe isolation from supply.
NXAIR / ≤ 40 kA
Operating the switch-disconnector panel
CLOSED
CLOSED
Type of accessibility:
Tool-based
Interlock-controlled
Tool-based
OPEN
OPEN
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