Lifting means – Rockwell Automation 1329R Vertical Mount, In-Line AC Motors User Manual

Page 5

Vertical Solid Shaft Normal Thrust and In-Line AC Motors

Table A
General Effect of Voltage & Frequency Variation on Induction-motor Characteristics

NOTE: This table shows goneral effects, which will vary somewhat for specific ratings.

Lifting Means

Lifting means are provided for handling the motor only and should
not be used to lift the motor plus the driven equipment without
consulting the local Allen-Bradley Sales Office. In all cases, care
should be taken to assure lifting in the direction intended in the design
of the lifting means. Likewise, precautions should be taken to prevent
hazardous overloads due to deceleration, acceleration or shock forces.
Refer to Lifting Nameplate to assure correct lifting procedure. (See
below).

When mounting the motor it is essential that motor and drive unit be
rigidly supported in correct alignment. This also applies when
mounting In-line NEMA LP motors.

Variation

Starting &
Maximum
Running
Torque

Sync
Speed

Slip %

Full Load
Speed

Efficiency

Power Factor/COS

Full
Load
Current

Starting
Current

Temperature
Rise
(full load)

Maximum
Overload
Capacity

Magnetic
Noise
(no-load in
particular)

Full-Load

3/4 Load

1/2 Load

Full Load

3/4 Load

1/2 Load

Voltage Variation:

120%
voltage

Increase
44%

No
change

Decrease
30%

Increase
1.5%

6-0%
Decrease
(1-75 HP)
0-3%
Increase
(100-200 HP)

Decrease
1/2-2
points

Decrease
7-20
points

Decrease
5-15 points

Decrease
10-30
points

Decrease
15-40
points

Increase
12%

Increase
20%

Increase 5-6
degrees C.

Increase
44%

Noticeable
increase

110%
voltage

Increase
21%

No
change

Decrease
17%

Increase
1%

Slight
decrease

Practically
no change

Decrease
1-2 points

Decrease
5-10 points

Decrease
5 points

Decrease
5-6 points

Increase
2-4%

Increase
10-12%

Increase 3-4
degrees C.

Increase
21%

Increase
slightly

Functions
of Voltage

(voltage)

Constant

1
(voltage)

(sync
speed slip)

voltage

(voltage)

90%
Voltage

Decrease
19%

No
change

Increase
23%

Decrease
1-1/2%

Decrease
2 points

Practically
no change

Increase
1-2 points

Increase
5 points

Increase
2-3 points

Increase
4-5 points

Increase
11%

Decrease
10-12%

Increase 6-7
degrees C.

Decrease
19%

Slight
decrease

Frequency Variation:

105%
frequency

Decrease
10%

Increase
5%

Practically
no change

Increase
5%

Slight
increase

Slight
decrease

Decrease
5-6%

Slight
decrease

Function of
frequency

(frequency)

Frequency

(sync
speed slip)

frequency

95%
frequency

Increase
11%

Decrease
5%

Practically
no change

Decrease
5%

Slight
decrease

Slight
increase

Increase
5-6%

Increase
slightly

ATTENTION: When lifting means are provided for
handling the motor, it should not be used to lift the motor
plus additional equipment such as gears, pumps,
compressors or other driven equipment. Failure to observe
this precaution could result in bodily injury.