CB-110-414
Information
Cable sizes shown are the maximum possible
that may be connected to the FI. Select cables
according to local wiring codes or regulations at
the point of installation.
5.3 Connector cover removal IP55/66
Turn the fastening screws of the connector cover coun-
terclockwise and remove the cover.
Fig.7: Fastening screws for connector cover
5.4 Earth connection
• IP20: Wire end ferrule
• IP66: M4 ring cable lug for mounting on base
• IP55: Normal cable lug
EN61800-5-1 (product standard for adjustable speed
electrical power drive systems) and
DINEN50178DINVDE0160 (Electronic equipment
for use in power installations) have special earthing re-
quirements as soon as an earth leakage current of
3.5mA is exceeded.
• The protective earth conductor cross-section for the
line conductors (L1, L2, L3) <16mm² must be
10mm² with a single wire design or must have two
wires with the respective phase cross-section.
• For line conductors (L1, L2, L3) ≥16 mm² and ≤35
mm², the protective earth conductor must have a
cross section of 16mm².
• For line conductors (L1, L2, L3) >35mm², the pro-
tective earth conductor cross-section must be at
least 50% of that of the line conductors used (L1, L2,
L3).
All exposed metal parts in the VARIPACK frequency in-
verter are protected with a basic insulation and connec-
ted to the protective earth conductor.
WARNING
The VARIPACK frequency inverters can gener-
ate a direct current in the protective earth con-
ductor.
Risk of electric shock upon contact!
Wherever a residual current device (RCD) or a
residual current monitoring device (RCM) is
used for protection against direct or indirect con-
tact, only a RCD or RCM of type B (according to
IEC/EN60755) is permitted on the power supply
side!
Residual current circuit breakers (RCD or FI switch)
• Use only FI circuit breakers (RCD) of type B that are
sensitive to all types of currents and capable of de-
tecting residual direct currents.
• Select a separate RCD for each FI with respect to
the system configuration and environmental condi-
tions.
5.5 Information for UL compliance
The frequency inverter is designed to meet the UL re-
quirements. For an up to date list of UL compliant
products, please refer to UL listing NMMS.E475976. In
order to ensure full compliance, the following must be
fully observed.
Input power supply requirements
Supply
voltage
380 .. 480 V +/- 10% (TN and TT
power grid)
Frequency 50 .. 60 Hz +/- 5%
Short cir-
cuit capa-
city
All FI are suitable for use on a circuit
capable of delivering not more than
100 kA maximum short-circuit cur-
rent symmetrical with the specified
maximum supply voltage when pro-
tected by class J fuses.
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