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| Dual speed or Multi speed motors against specific requirements are available. Amongst these, 2-speed motors are very popular and have been found to be an economically viable preposition in many applications. The changeover of speed can be done by a simple special switch or by suitable connections in the panel. A wide range of frame-wise standardized ratings as given in the table hereunder are available. |
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|
| FRAME-WISE 2-SPEED MOTOR RATINGS |
|
| 1500/3000 RPM (4 / 2 POLE) |
|
750/1500 RPM (8 / 4 POLE) |
| FRAME |
KW |
HP |
|
FRAME |
KW |
HP |
| 63 |
0.12./0.18 |
0.16/0.25 |
|
|
|
|
| 71 |
0.30/0.45 |
0.4/0.6 |
|
71 |
0.07/0.12 |
0.1/0.16 |
| 80 |
0.6/0.8 |
0.8/1.1 |
|
80 |
0.22/0.45 |
0.3/0.6 |
| 90 L |
1.3/1.6 |
1.7/2.2 |
|
90 L |
0.45/0.9 |
0.6/1.2 |
| 100 L |
2.2/3 |
3.0/4.0 |
|
100 L |
0.9/1.5 |
1.2/2.0 |
| 112 M |
3.2/4 |
4.2/5.5 |
|
112 M |
1.3/2.2 |
1.8/3.0 |
| 132 S |
4/5.5 |
5.5/7.5 |
|
132 S |
2.2/3.3 |
3/4.5 |
| 132 M |
6.5/8.2 |
8.7/11 |
|
132 M |
3/4.5 |
4.0/6.0 |
| 160 M |
9.0/11.0 |
12.0/15.0 |
|
160 M |
4.9/7.5 |
6.5/10 |
| 160 L |
12.0/15.0 |
16.0/20.0 |
|
160 L |
6.8/10.5 |
9.0/14.0 |
|
|
| 1000/1500 RPM (6 / 4 POLE) |
|
750/1000 RPM (8 / 6 POLE) |
| FRAME |
KW |
HP |
|
FRAME |
KW |
HP |
| 71 |
0.12/0.15 |
0.16/0.2 |
|
71 |
0.06/0.09 |
0.08/0.12 |
| 80 |
0.3/0.37 |
0.4/0.5 |
|
80 |
0.12/0.18 |
0.16/0.24 |
| 90 L |
0.6/0.9 |
0.8/1.2 |
|
90 L |
0.3/0.45 |
0.4/0.6 |
| 100 L |
0.9/1.3 |
1.2/1.8 |
|
100 L |
0.55/0.75 |
0.75/1 |
| 112 M |
1.3/2 |
1.8/2.7 |
|
112 M |
0.75/1.2 |
1/1.6 |
| 132 S |
2.2/3.3 |
3.0 /4.5 |
|
112 M |
1.3/2 |
1.8/2.7 |
| 132 M |
3/4.5 |
4.0/6.0 |
|
112 M |
2/2.7 |
2.7/3.6 |
| 160 M |
4.0/6.0 |
5.5/8.0 |
|
160 M |
3.0/4.0 |
4/5.5 |
| 160 L |
6.0/9.0 |
8.0/12.0 |
|
160 L |
4/5.5 |
5.5/7.5 |
|
|
| 500/3000 RPM (12 / 2 POLE) |
|
500/1000 RPM (12 / 6 POLE) |
| FRAME |
KW |
HP |
|
FRAME |
KW |
HP |
| 100 L |
0.22/1.8 |
0.3/2.5 |
|
100 L |
0.25/0.55 |
0.33/0.75 |
| 112 M |
0.4/2.5 |
0.55/3.3 |
|
112 M |
0.45/0.9 |
0.6/1.2 |
| 132 M |
1.0/5.0 |
1.3/6.7 |
|
132 S |
0.9/1.8 |
1.2/2.4 |
| 160 L |
2.0/11 |
2.7/15 |
|
132 M |
1.2/2.4 |
1.6/3.2 |
| |
|
|
|
160 M |
1.5/3 |
2.0/4.0 |
| |
|
|
|
160 L |
2.1/4 |
2.8/5.5 |
|
|
| 750/3000 RPM (8 / 2 POLE) |
|
1000/3000 RPM (6 / 2 POLE) |
| FRAME |
KW |
HP |
|
FRAME |
KW |
HP |
| 80 |
0.15/0.45 |
0.2/0.6 |
|
80 |
0.22/0.45 |
0.3/0.6 |
| 90L |
0.3/1.1 |
0.4/1.5 |
|
90L |
0.5/1.1 |
0.67/2 |
| 100L |
0.37/2.5 |
0.5/1.8 |
|
100L |
0.7/1.8 |
0.9/2.5 |
| 112M |
0.7/2.5 |
0.9/3.3 |
|
132 M |
1.5/2.2 |
2.0/3.0 |
| 132M |
1.5/5 |
2/6.7 |
|
132M |
2/0.55 |
2.7/7.5 |
| 160L |
3.7/11 |
5.0/15.0 |
|
160 L |
5.0/11.0 |
6.7/15 |
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| In this connection the following points may be noted : |
|
- 4/2P, 8/4P & 12/6P motors are single winding D/YY, Dahlander connection motor.
- Other motors have separate Y (star) connected windings.
- The ratings indicated are maximum for particular frames.
- In separate winding motors, it may be possible to increase rating of one polarity, by reducing rating of other polarity
- The ratings shown above are for S1 duty. These may change for short time duty, more number of starts etc.
- The ratings are for TEFC construction, it may be possible to increase the ratings by force cooling.
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