Floor Mounting; V-Belt Drive; Direct Connected Drive; Electrical Connections - ABB M2B Serie Manual De Instalación, Manejo Y Mantenimiento

2.4 Floor mounting

Motors should be provided with a fi rm, rigid foundation,
with the plane of four mounting pads fl at within.015"
from 405 through 588 frame. This may be accomplished
by shims under the motor feet. For special isolation
mounting, contact ABB for assistance.

2.5 V-belt drive

1. Select proper belts and sheaves, do not over belt.
Excessive belt load will damage bearings. Sheaves
should be in accordance to NEMA spec. MG-1 or as
approved by the manufacturer for a specifi c
application.
2. Align sheaves carefully to avoid axial thrust on motor
bearing. The drive sheave on the motor should be
positioned toward the motor so it it as close as
possible to the bearing.
3. When adjusting belt tension, make sure the motor is
secured by all mounting bolts before tightening belts.
4. Adjust belt tension to belt manufacturers
recommendations. Excessive tension will decrease
bearing life.

2.6 Direct connected drive

Flexible or solid shaft couplings must be properly
aligned for satisfactory operation. On fl exible couplings,
the clearance between the ends of the shafts should be
in accordance with the coupling manufacturer's
recommendations or NEMA standards for end play and
limited travel in coupling.
MISALIGNMENT and RUN-OUT between direct
connected shafts will cause increased bearing loads
and vibration even when the connection is made by
means of a fl exible coupling. Excessive misalignment
will decrease bearing life. Proper alignment, per the
specifi cations of the coupling being used, is critical.
Some large motors are furnished with roller bearings.
Roller bearings should not be used for direct drive.
ABB / Low Voltage NEMA Motors / Manual 03-2006

2.7 Electrical connections

Caution
Install and ground per local and national codes.
Consult qualifi ed personnel with questions or if repairs
are required.
Warning
1. Disconnect power before working on motor or
driven equipment. It is necessary to make sure that
the rotor of the motor can neither be energized
electrically nor start to rotate by any other means.
2. Motors with automatic thermal protectors will
automatically restart when the protector
temperature drops suffi ciently. Do not use motors
with automatic thermal protectors in applications
where automatic restart will be hazardous to
personnel or equipment.
3. Motors with manual thermal protectors may start
unexpectedly after protector trips. If manual
protector trips, disconnect motor from power line.
After protector cools (fi ve minutes or more) it can
be reset and power may be applied to the motor.
4. Discharge all capacitors before servicing motor.
5. Always keep hands and clothing away from moving
parts.
6. Never attempt to measure the temperature rise of a
motor by touch. Temperature rise must be
measured by thermometer, resistance, imbedded
detector, or thermocouple. The temperature of the
outlet surface of the motor may be too hot to touch
during normal operation.
7. Electrical repairs should be performed by trained
and qualifi ed personnel only.
8. Failure to follow instructions and safe electrical
procedures could result in serious injury or death.
9. If safety guards are required, be sure the guards
are in use.
1. All wiring, fusing, and grounding must comply with
National Electrical Codes and local codes.
2. To determine proper wiring, rotation and voltage
connections, refer to the information and diagram on
the name plate, separate connection plate or decal.
If the plate or decal has been removed, contact ABB
for assistance.
3. Use the proper size of line current protection and
motor controls as required by the National Electrical
Code and local codes. Recommended use is 125%
of full amps as shown on the name plate for motors
with 40°C ambient and a service factor over 1.0.
Recommended use is 115% of full load amps as
shown on the name plate for all other motors.
Do not use protection with larger capacities than
recommended. Three phase motors must have all
three phases protected.
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