General safety and application notes for Lenze motors
3
Safety information
3.3
L
3.3-2
EDS82EV903-1.0-11/2002
Ensure an even surface, solid foot or 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 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 tools to mount or remove belt pulleys and clutches (heat
generation!)and cover them witha touch guard. Impermissiblebelt tensionsmust
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 with a cover which prevents the ingression 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 drivesystem - must not betaken inagain
immediately.
Alloperations must only becarried out byqualified and skilled personnel whenthe
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 - areexceeded, 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 PEconductor
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 U
r
≤ 725 V, 14 mm at U
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.
Installation
Electrical connection
To Next Page
Loading...
Need help?
General