Operating the metering panel
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NXAIR M
139-2021.9 / 07
12.3 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
12.4 Opening or closing the high-voltage door
The procedure for opening and/or closing the high-voltage door at the metering 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 metering panel, see chapter 10.4
and/or 10.5.
12.5 Racking the withdrawable metering
part
The procedure for racking the withdrawable metering part to service position and/or test position is identical
with the procedure for racking the withdrawable circuit-breaker to service position and/or test position.
For racking the withdrawable metering part to service position and/or test position, see
chapter 10.7 and/or 10.8.
12.6 Removing or plugging on the low-voltage connector
The procedure for removing and/or plugging on the low-voltage connector in the metering panel is identical
with the procedure for removing and/or plugging on the low-voltage connector in the circuit-breaker panel.
Control elements at the front of the withdrawable metering part
Access to the control elements at the front side of the withdrawable metering part is given after opening the
high-voltage door.
Fig. 125: Control elements at the front side of the withdrawable metering part, example
(1) Miniature circuit-breakers
1
