Operating Instructions – MOVI-SWITCH® 1EM
23
5
Installation instructions
Electrical Installation
5.1.8
Installation above 1000 m asl
MOVI-SWITCH
®
1EM drives with line voltages of 380 to 500 V can be used in altitudes
of 1000 m and up to a maximum of 4000 m above sea level under the following condi-
tions.
1)
•
The nominal continuous power is reduced due to the reduced cooling above 1000 m
(see chapter "Technical Data").
•
Above 2000 m asl, the air and creeping distances are only sufficient for overvoltage
class 2. If the installation calls for overvoltage class 3, you will have to install addi-
tional external overvoltage protection to limit overvoltage peaks to 2.5 kV phase-to-
phase and phase-to-ground.
•
If safe electrical disconnection is required, it must be implemented outside the unit
for altitudes of 2000 m above sea level and higher (safe electrical disconnection in
accordance with EN 61800-5-1).
•
At installation altitudes between 2000 m and 4000 m above sea level, the permitted
nominal line voltage is reduced by 6 V per 100 m.
5.1.9
Protection devices
MOVI-SWITCH
®
-1EM drives are equipped with integrated protection devices against
motor overload. External motor protection devices are not necessary.
1) The maximum altitude is limited by creeping distances and flameproof components, such as capacitors.
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