Verification Of Safe Isolation From Supply; Lrm Plug-In Sockets - Siemens NXPLUS C Installation And Operating Instructions Manual

Operation
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24

Verification of safe isolation from supply

24.1

LRM plug-in sockets

DANGER!
High voltage! Danger! Verify safe isolation from supply without any doubt!
Possible sources of failure:

- Defective voltage indicator (or device for function testing of the coupling section)
- Maloperation of the voltage indicator (or device for function testing of the coupling
section)
Test the perfect function of the voltage indicator and the coupling section in accordance

with national standards:
- On a live panel
- With a test unit according to IEC 61243-5/EN 61243-5
- On all phases
Use only voltage indicators or devices according to EN 61 243-5 / IEC 61 243-5 / VDE 0682-

415 to test the function of the coupling section. (The interface conditions have not
changed as against the old standard VDE 0681 Part 7; the corresponding indicators can still
be used.)
Perform repeat test of interface conditions at the capacitive interfaces, as well as on the

indicators according to the customer's specifications or national standards.
Do not use short-circuiting jumpers as separate plugs. The function of the surge arrester

installed is not guaranteed anymore if short-circuiting jumpers are used (see page 27,
"Voltage detecting systems").
Fig. 137: Verification of safe isolation from
supply (LRM plug-in sockets)
Remove covers from plug-in sockets (capacitive test sockets L1, L2, L3).

Plug voltage indicator in all three phases L1, L2, L3 of the plug-in sockets.

If the indicator does not flash or light up in any of the three phases, the phases are not live.
r
Replace the covers on the plug-in sockets.

Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C Wind • 802-9074.9
Voltage indicator type LRM
Capacitive test socket L2
Earth socket
Cover for test sockets
Documentation to repeat test of interface
condition