5
Electrical installation
Installation instructions
Operating Instructions – MOVIMOT
®
flexible
56
5.3.12 Installation above 1000m asl
You can install the drive units at altitudes from 1000 m to a maximum of 3800 m
above sea level provided the following conditions are met.
1)
• The nominal motor current I
N
is reduced due to the reduced cooling above 1000m
(see chapter "Technical data and dimension sheets").
• Above 2000m above sea level, the air and creeping distances are only sufficient
for overvoltage categoryII. If the installation requires overvoltage categoryIII, you
will have to install additional external overvoltage protection to limit overvoltage
peaks to 1.5kV phase-to-phase and 2.5kV phase-to-ground.
• If safe electrical disconnection is required, it must be implemented outside the unit
for altitudes of 2000m above sea level and higher (safe electrical disconnection in
accordance with EN61800‑5‑1).
• At installation altitudes between 2000m and 3800m above sea level, the permit-
ted rated power supply voltages are reduced as follows:
– By 6V per 100 m
1) The maximum altitude is limited by the reduced electric strength due to the lower air density.
5.3.13 Protection devices
• The units come equipped with integrated protection devices against overload.
• Cable protection for the power cable must be implemented using external overload
devices.
• Observe the relevant standards concerning the cable cross section, voltage drop
and installation type.
5.3.14 UL-compliant installation (in preparation)
The UL and cUL approval for the MOVIFIT
®
flexible device series is in preparation.
29129451/EN – 12/2019
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