Lenze 8400 - Manual (Page 16)

Safety instructions
General safety and application instructions for Lenze motors
2

16 EDS84ASC552 EN 9.1
Installation
Ensure an even surface, solid foot/flange mounting and exact alignment if a direct clutch
is connected. Avoid resonances with the rotational frequency and double mains frequency
which may be caused by the assembly. Turn rotor by hand, listen for unusual slipping
noises. Check the direction of rotation when the clutch is not active (observe section
”Electrical connection”).
Use appropriate means to mount or remove belt pulleys and clutches (heating) and cover
them with a touch guard. Avoid impermissible belt tensions.
The machines are halfkey balanced. The clutch must be halfkey balanced, too. The visible
jutting out part of the key must be removed.
If required, provide pipe connections. Designs with shaft end at bottom must be protected
with a cover which prevents the ingress of foreign particles into the fan. Free circulation of
the cooling air must be ensured. The exhaust air also the exhaust air of other machines
next to the drive system must not be taken in immediately.
Electrical connection
All operations must only be carried out by qualified and skilled personnel on the
lowvoltage machine at standstill and deenergised and provided with a safe guard to
prevent an unintentional restart.This also applies to auxiliary circuits (e. g. brake, encoder,
blower).
Check safe isolation from supply!
If the tolerances specified in EN 600341; IEC 34 (VDE 05301) voltage ±5 %, frequency ±2 %,
waveform, symmetry are exceeded, more heat will be generated and the electromagnetic
compatibility will be affected.
Observe the data on the nameplate, operating notes, and the connection diagram in the
terminal box.
The connection must ensure a continuous and safe electrical supply (no loose wire ends);
use appropriate cable terminals. The connection to the PE conductor must be safe. The
plug-in connectors must be bolt tightly (tostop).
The clearances between blank, live parts and to earth must not fall below 8 mm at
V
rated
 550 V, 10 mm at V
rated
 725 V, 14 mm at V
rated
 1000 V.
The terminal box must be free of foreign particles, dirt and moisture. All unused cable
entries and the box itself must be sealed against dust and water.