Operation, Motor start-up – Rockwell Automation 1329L AC Induction Motors User Manual User Manual

Page 14

AC Induction Motors

Table E
Radial Load Capacity - No Axial Load

Data for motors with roller bearings at the drive end (back end). Motors with ball bearings at the drive
end are for coupled duty only.

Contact Allen-Bradley to determine L440 frame belt load requirements.

Operation

Motor Start-Up

ATTENTION: The use of these radial load capacities
requires the accurate calculation of the radial load for the
application. Radial loads for gears, sprockets, and flywheel
are usually accurately determined but the radial loads due
to V-belt drives are subject to miscalculations because they
do not include all of the pre-tension load (belt tightening).
The calculations of the radial load for a V-belt drive must
include the pre-tension for transmitting the horsepower,
pre-tension for centrifugal force on the belts, pre-tension
for high start torques, rapid acceleration or deceleration,
pre-tension for drives with short arc-of-contact between the
V-belt and sheave, and low coefficient of friction between
belt and sheave caused by moisture, oil or dust. Failure to
observe these precautions could result in damage to or
destruction of the equipment.

Frame

Radial Load Capacities at the End of the Shaft in kg (lbs.)
2500 RPM

1750 RPM

1150 RPM

850 RPM

L180

202 (445)

L210

397 (875)

L250

623 (1375)

692 (1525)

L280

703 (1550)

796 (1755)

L320

764 (1685)

816 (1800)

UL360

1157 (2550)

1304 (2875)

1497 (3300)

1501 (3310)

UL400

1644 (3625)

1855 (4090)

2132 (4700)

2354 (5190)

ATTENTION: Before initial start-up observe the
following precautions.

•

Remove all unused shaft keys and loose rotating parts
to prevent them from flying off. Replace covers and
protective devices.

•

When the motor is supplied as part of drive system,
refer to the Drive User Manual for operating
instructions. Tachometer feedback must be properly
connected for closed loop operation. Reverse
polarities or broken connections can cause dangerous
overspeeds.

Failure to observe these precautions could result in
personal injury or death.