Siemens 1LA Betriebsanleitung Seite 33

Limit values
The following table indicates the measuring circuit voltage together with the minimum
insulation resistance and the critical insulation resistance.
Table 4 Insulation resistance
Measuring circuit voltage
Minimum insulation resistance with new,
cleaned or repaired windings
Critical specific insulation
long operating time
(Values app ly at a wind
Measures before commissionin
Once the system has been correctly installed, you should check the follo
commissioning:
● The machine has been assembled and aligned correctly.
● The machine has been connected so that it rotates in the direction specified.
● The operating conditions match the data specified on the rating plate.
● The bearings have been lubricated as appropriate for the version used. Ro
contact bearing machines which have been in storage for more than 24 mo
have been rel ubricated.
● An y suppleme
and is functioning as it should.
● For versions with bearing thermometers, the bearing temperatures must be
checked duri ng the machine's first period of operation. The warning and
shutdown values are set on the monitoring device.
● Approp riately configured control and speed monitoring functions ensure that the
machine cannot exceed the permissible speeds specified on the rating plate.
● The output elements have the correct set
balancing of couplings, belt forces in the c
tooth face cle arance in th
clearance in the case of c
● The mini mum insulation resistance and minimum clearance values have been
adhered to.
● The gro u nding and equipotential bonding connections have bee
correctly.
● All fixing screws, connection elements, and electrical connections have been
tightened to the specified torques.
● Lifting eyes that were screwed in have been removed following installation or
secured to prevent them becoming loose.
● The rotor can turn without coming into contact with the stator.
Standard machines_Operating_Instructions_Compact
56100000002001 EN, 01/2010
resistance after a
ing temperature of 25 °C.)
g
ntary machine monitoring equipment has been connected correctly
e case of toothed-wheel power output, radial and axial
oupled shafts).
Rated voltage U
tings for their type (e.g. alignment and
ase of a belt drive, tooth forces and
Commissioning
< 2 kV
rated
500 V
10 MΩ
0.5 MΩ/kV
wing prior to
lling-
nths
n established
13