Operation
176/214 Revision 06 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • 864-5091.9
41 Verification of safe isolation from supply
41.1 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.
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 34,
"Voltage detecting systems").
Fig. 208: Verification of safe
isolation from supply
①
Voltage indicator type LRM
②
Interface (capacitive test socket) for L2
③
Earth socket
④
Documentation to repeat test
of interface condition
⑤
Cover for test sockets
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