TORQUES AND CURRENTS IN MOTORS
  Type of motor - Average starting
Current % 
Torque %
Single Phase .
.
Split Phase,direct on line
600
50
Split Phase, resistance start
200
25
Capacitor
300
100
Repulsion
250
350
Slip ring with rorot resistance capacitor
400
300
Series motor, resistance start
150
300
2- phase
.
.
Squirrel cage,direct on line
450
125
Suirrel cage, series parallel
175
25
slip ring, with rorot resistance
100
100
3 - phase
.
.
Direct on line
600
150
Star Delta
175
33
Auto Transformer 40% tapping
150
20
Auto Transformer 60% tapping
200
40
Auto Transformer 75% tapping
300
75
Direct current
250
100

 STARTING TORQUES AND CURRENTS
Method of starting
Direct on line
Star/ Delta
Auto Transformer
30%
60%
75%
% Line Voltage
100
58
50
60
75
%Full load current
500
170
125
100
280
% Full load torque
125
42
32
45
70

ELECTRICAL MOTOR FULL LOAD CURRENT
CONSTANTS FOR MOTOR STARTING CURRENT DETERMINATE
H.P
115V
230V
550V
Power supply
 
Constant
.25
3
1.5
....
Two Phase:
   
.50
5.4
2.7
....
Three wire
220V
0.331
.75
7.4
3.7
1.6
Three wire
440V
0.622
1.0
9.6
4.8
2.0
     
2.0
17
8.5
3.6
     
3.0
25
12.5
5.2
Three phase
   
5.0
40
20
8.3
     
10.0
76
38
16
- 208 V
 
0.360
50.0
360
180
75
- 220 V
 
0.381
100.0
...
355
148
- 440 V
 
0.762
200.0
...
712
295
- 550 V
 
0.652

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