DSE Model 5520 Automatic Mains Failure Control and Instrumentation System Operators Manual
5520 OPERATING MANUAL ISSUE 1 04/02/05 AM
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12. APPENDIX
10.3.3 5520 IDMT TRIPPING CURVES (TYPICAL)
5520 Delayed over-current protection
1
10
100
1000
10000
100000
1000000
1
2
3
Current as a multiple of the trip-point setting
T
ri
p
p
in
g
ti
m
e
in
se
co
n
d
s
At default setting of t = 36