ABB CL Series, Applications Manual

Page: 409 / 428

Appendix
406
1SVC 440 795 M1100
Inductive load without external suppressor circuit
General explanations:
T
0.95
= Time in milliseconds until 95 % of the stationary
current is reached.
Utilisation category in groups for
• Q1 to Q4, Q5 to Q8
T
0.95
Q
3 × T
0.65
= 3 ×
L
R
T
0.95
= 1 ms
R = 48
O
L
= 16 mH
Utilisation factor per group g = 0.25
Relative duty factor % 100
Max. switching frequency
f
= 0.5 Hz
Max. duty factor
DF = 50 %
Switch operations/h 1500
DC13
T
0.95
= 72 ms
R = 48
O
L = 1.15 H
Utilisation factor g = 0.25
Relative duty factor % 100
Max. switching frequency
f = 0.5 Hz
Max. duty factor
DF = 50 %
Switch operations/h 1500