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Product Introduction
Appendix

The standlard starting classes are 6.150.300 and 600 starts per hour , taking into account complete starting, josging or inching and electric (plug) braking operation on the following basic.

One jog (i.e. an inicomp lete start during which the motors does not reach more than 4 rated speed) is thermally equivalent h0.8 complete starting.

One plug braking operation (down to 1/3 rated speed) is thermally equivalent to 0.8 complete starting.

One complete plug reversals is approximatecy a thermal equivalent of 1.8 complete starting.

Examples of typical starting duty are shown in table 9.

表9
Duty type
Starting duty
Number of starts of o-thermal equivalent per hour
Brakings to 1/3 rated speed per hour
Jogs per hour
Brakings to 1/3 rated speed per hour
Complete plug reversals per hour
S3
6
0
0
0
6
S3
4
8
0
0
S3
2
8
2
0
S4
150
0
0
0
150
S4
100
200
0
0
S5
80
0
80
0
S5
65
130
65
0
S5
30
160
30
30
S4
300
0
0
0
300
S4
200
400
0
0
S5
160
0
150
0
S5
130
160
130
0
S5
60
320
60
60
S4
600
0
0
0
600
S4
400
800
0
0
S5
260
0
320
0
S5
260
520
260
0
S5
120
640
120
120
    
     
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