Lenze ECS series - Manual (Page 25)

Safety
General safety and application notes for Lenze motors
2

25 EDKCSXX0XX DE/EN/FR/ES/IT 4.0
Installation
Ensureanevensurface,solidfootorflange mountingandexactalignmentifa directclutch
isconnected. Avoidresonanceswith the rotational frequencyanddouble mainsfrequency
which may be caused during assembly. Turn rotor by hand, listen for unusual slipping
noises. Check the direction of rotation when the clutch is not active (observe section 5).
Use appropriate toolstomountor remove belt pulleysand clutches(heat generation!) and
cover them with a touch guard. Impermissible belt tensions must be avoided (technical
list).
The machines are half-key balanced. The clutch must be half-key balanced, too. The visible
outstanding part of the key must be removed.
If required, provide pipe connections. Designs with shaft end at bottom must be protected
withacoverwhichpreventstheingression offoreign particlesintothefan. Freecirculation
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 again immediately.
Electrical connection
All operations must only be carried out by qualified and skilled personnel when the
low-voltage machine is at standstill and when the machine is de-energized and protected
against unintentional restart. This also applies to auxiliary circuits (e.g. brake, encoder,
separate fan).
Check safe isolation from the supply!
If the tolerances in EN 60034-1; IEC 34 (VDE 0530-1) - voltage ±5 %, frequency ±2 %, wave
form, symmetry - are exceeded, more heat will be generated and the electromagnetic
compatibility will be influenced.
Observe the indications 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 connector must be bolt tightly (to stop).
The clearances between blank, live parts and earth must not fall below 8 mm at V
r
≤ 550
V, 10 mm at V
r
≤ 725 V, 14 mm at V
r
≤ 1000 V.
The terminal box must be clean and dry; foreign particles, dirt and moisture disturb
operation. All unused cable entries and the box itself must be sealed against dust and
water. For the trial run without output elements, lock the key. Check brake operation
before commissioning of low-voltage machines with brakes.
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