Electrical installation
Important notes
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Lenze ¯ BA 33.0008 ¯ 5.0
6 Electrical installation
6.1 Important notes
{ 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 ±10 %
– 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 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.
¯ 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,
– all connections at the terminal board are tightened.
¯ The smallest air gaps between uncoated, live parts and against earth must not fall
below the following values.
Motor diameter Minimum requirements for basic
insulation according to IEC/EN
60664−1 (CE)
Higher requirements for UL design
< 178 mm
3.87 mm
6.4 mm
> 178 mm 9.5 mm
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