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8
7.2 Installation altitude
Installation altitude is the height above sea level of
the installation site.
• Motors installed up to 1000 metres above sea
level can be loaded 100 %.
• Motors installed more than 1000 metres above
sea level must not be fully loaded due to the low
density and consequent low cooling effect of the
air. See fig. 3.
Fig. 3 Derating of motor output (P2) in relation
to altitude above sea level
8. Working on the product
8.1 Megging
The motor must not be installed more
than 2000 metres above sea level.
TM05 6400 4712
1
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.90
0.89
0.88
0
0
1000 1200 1400 1600 1800 2000 2200
[m]
P2
[%]
Warning
Before fitting add-on modules, making
connections in the terminal box or
breaker cabinet or starting fault
finding, make sure that the power
supply has been switched off for at
least 5 minutes. Make sure that the
power supply cannot be accidentally
switched on.
Megging of an installation
incorporating MGE motors is not
allowed, as the built-in electronics may
be damaged.
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