Lenze 13.7xx Motors-Geared motors - Manual (Page 15)

Safety instructions
Safety instructions for low−voltage machines
2
l
15 BA 13.0009 − EN 2.1
Electrical connection
All operations must only be carried out by qualified and skilled personnel on the
low−voltage 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 60034−1; IEC 34 (VDE 0530−1) − 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 bolted tightly (to stop).
The clearances between blank, live parts and to earth must not fall below 8 mm at
U
r
£ 550 V, 10 mm at U
r
£ 725 V, 14 mm at U
r
£ 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.
Commissioning and operation
Before commissioning after longer storage periods, measure insulation resistance. In the
case of values
£ 1 kW per volt of rated voltage, dry winding.
For trial run without output elements, lock the featherkey. Do not deactivate the
protective devices, not even in a trial run.
Check the correct operation of the brake before commissioning low−voltage machines
with brakes.
Integrated thermal detectors do not provide full protection for the machine. If necessary,
limit the maximum current. Parameterise the controller so that the motor will be switched
off with I > I
r
after a few seconds of operation, especially at the risk of blocking.
Vibrational severities v
eff
£ 3.5 mm/s (P
r
£ 15 kW) or 4.5 mm/s (P
r
> 15 kW) are acceptable if
the clutch is activated.
If deviations from normal operation occur, e.g. increased temperatures, noises, vibrations,
find the cause and, if required, contact the manufacturer. In case of doubt, switch off the
low−voltage machine.
If the machine is exposed to dirt, clean the air paths regularly.
Shaft sealing rings and roller bearings have a limited service life.
Regrease bearings with relubricating devices while the low−voltage machine is running.
Only use the grease recommended by the manufacturer. If the grease drain holes are
sealed with a plug, (IP54 drive end; IP23 drive and non−drive end), remove plug before
commissioning. Seal bore holes with grease. Replace prelubricated bearings (2Z bearing)
after approx. 10,000 h − 20,000 h, at the latest however after 3 − 4 years.
The product−specific safety and application notes given in these instructions must be
observed!