Commissioning
Commissioning
Insulation resistance
WARNING
Only expert personnel should b
installations.
e entrusted with work on power
Before starting commissioning, install all covers that are designed to
prevent active or rotating parts from being touched, or which are
necessary to ensure correct air guidance and thus effective cooling.
WARNING
During measurement and immediately afterwards, some of the
terminals are at hazardous voltage le not touch th
With the power nnected, check that no voltage c
applied.
vels. Do em.
an be cables co
Chec lation resista
CAU
king the insu nce
TION
The sistance nee be checked prior to start-up and again after any
exte iods during which the equipment is not
oper begin measuring the insulation resistance, please r the
oper ul resistance meter you are going to use.
Disc ain-circuit cables that are connected to the terminals before
mea sulation resistance.
insulation re ds to
r pernded periods of storage o in
eadation. Before you
ating manual for the ins
onnect any m
ation
suring the in
NOTICE
If the critical insulation resistance is less than or equal to this value, the windin
must be dried or, if the fan is removed, cleaned thoroughly and dried.
Please note that the ins
gs
ulation resistance of dried, clean windings is lower than that
rm windings. The insulation resistance can only be properly assessed after of wa
conversion to the reference temperature of 25 °C.
NOTICE
If the measured value is close to the critical value, you must check the insulation
nce at suitably frequent intervals. resista
Measure the s n th i i o
when the winding tempera s en nd C f
insulation res e ly iffe tem atur he eas g, nt
full-scale resist e is reach ppro . 1 minute).
Measure the critical insulation resistance at the operating temperature of the winding.
minimum in ulation
ture i
resista
betwe
ce of
20 a
e wind
30 °
ng to th
. Other
e mach
values
ne encl
or the
sure
istanc
ance va
app
lu
at d rent
ed (a
per
x
es. W n m urin wait u il the
Standard machines_Operating_Instructions_Compact
12 56100000002001 EN, 01/2010
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