NORD Drivesystems B1091 - Manual (Page 5)

www.nord.com B1091-GB-4613 -5-
3. Information
3.2 Installation
 After installation, screwed-on lifting lugs must be tightened or removed.
 Smooth running: Precise alignment of the coupling and a well-balanced drive element
(coupling, belt pulleys, fans, etc.) are prerequisites for quiet, low vibration operation.
 Complete balancing of the motor with the drive elements may be necessary.
 The upper section of the terminal box and the terminal box position can be rotated by
4 x 90 degrees.

IEC-B14 motors:
All four fixing screws must be screwed into the flanged bearing cover, even if they are
not required! The fixing screw threads must be inserted with a sealant, e.g. Loctite 242.
The maximum depth for screwing into in the bearing cover is 2 x d.
 The motor must be inspected for damage before installation and commissioning.
A damaged motor must not be commissioned.
 Rotating shafts and unused shaft ends must be safely protected against contact.
Unused parallel keys must be secured against being thrown out.
3.3 Balancing, drive elements
Fitting and removal of output assemblies (coupling, pulleys, gears, etc.) must be performed
with a suitable device. As standard, the rotors are balanced with half key balancing. When
fitting output elements to the motor shaft observe the appropriate type of balancing!
The output elements must be balanced in accordance with DIN ISO 1940!
Take the general precautions necessary for providing the output elements with touch guards.
If a motor is put into operation without an output element, secure the parallel key to prevent it
from being thrown out. This also applies if a second shaft end is fitted. Alternatively, remove
the parallel key.
3.4 Alignment
Especially in case of direct coupling, align the shafts of the motor and the driven machine both
axially and radially. Inaccurate alignment can lead to bearing damage, excessive vibrations
and shaft breakage.
3.5 Electrical connection
Feed the connecting leads into the terminal box with cable glands. The terminal box must be
sealed so that it is dust-tight and water-tight. The mains voltage and frequency must conform
to the data on the rating plate. ± 5% voltage deviations or ± 2% frequency deviations are
permissible without any reduction in performance. The connections and arrangement of the
terminal board jumpers must conform to the circuit diagram provided in the terminal box.
Connect the protective earth lead to the protective earth terminal.
Provide the ends of the connecting leads with cable lugs or curved ring eyes and connect
them to the terminal board. This also applies to the protective earth connection and the
external bonding lead.