Verifying Safe Isolation From Supply; Application Of Voltage Indicators; Overview Of Voltage Indicating Systems - Siemens NXAIR Operating Instructions Manual

20 Verifying safe isolation from supply

Before performing any kind of check or work in the busbar compartment or the connection compartment of
each panel, it has to be ensured that these compartments are safely isolated from supply.
To ensure the safe isolation from supply, use the integrated three-phase capacitive voltage detecting system
according to IEC 61243-5.

20.1 Application of voltage indicators

Electric shock
Always verify safe isolation from supply without any doubt
If safe isolation from supply is verified erroneously although operational voltage is
still applied, there is danger to life.

20.2 Overview of voltage indicating systems

As voltage indicators, two device systems are used:
•
CAPDIS and VOIS device systems installed in the door to the low-voltage compartment
•
LRM device system as an indicator with the associated measuring system installed below the
door to the low-voltage compartment
Fig. 484: Test sockets for feeder
110-0134.9 / 13
Verifying safe isolation from supply
INFORMATION
Read and understand these instructions before attempting operating works.
DANGER
Before performing any kind of checks or work in the busbar compartment
or the connection compartment of each panel, verify safe isolation from
supply in these compartments without any doubt.
Observe the Five Safety Rules.
To verify safe isolation from supply, do exclusively use intact LRM voltage
indicators that have been tested immediately before.
Please do absolutely observe the enclosed operating instructions for the
function test unit and the voltage indicator.
NXAIR / ≤ 40 kA
Fig. 485: Test sockets for busbar
265