Lenze MDFQA Operating Instructions - Manual (Page 28)

Electrical installation
Important notes
6
EN
28 Lenze ¯ BA 33.0006 ¯ 3.0
6 Electrical installation 6.1 Important notes
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Danger!
Hazardous voltage on the power connections even when disconnected
from mains: residual voltage >60 V!
Before working on the power connections, always disconnect the drive
component from the mains and wait until the motor is at standstill.
Verify safe isolation from supply!
(
Stop!
Electrical connections must be carried out in accordance with the
national and regional regulations!
Observe tolerances according to IEC/EN 60034−1:
– Voltage ±5 %
– Frequency ±2 %
– Wave form, symmetry (increases heating and affects electromagnetic
compatibility)
Observe notes on wiring, information on the nameplate, and the connection scheme in
the terminal box.
¯ The connection must ensure a continuous and safe electrical supply, i.e.
– no loose wire ends,
– use assigned cable end fittings,
– ensure good electrical conductivity of the contact (remove residual lacquer) if an
(additional) PE connection on the motor housing is used),
– establish a safe PE conductor connection,
– tighten the plugin connector to the limit stop.
– After the connection is completed, make sure that all connections on the
terminal board are firmly tightened.
¯ The smallest air gaps between uncoated, live parts and against earth must not fall
below the following values.
Minimum requirements for basic
insulation according to IEC/EN
60664−1 (CE) Higher requirements for UL
design Motor diameter
3.87 mm
6.4 mm < 178 mm
9.5 mm > 178 mm
¯ The terminal box has to be free of foreign bodies, dirt, and humidity.
¯ All unused cable entries and the box itself must be sealed against dust and water.