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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12.2 5520 SHORT CIRCUIT TRIPPING CURVES (TYPICAL)
Model 5520 Short circuit & Earth fault curves for a 3 phase fault @ 50 Hz
100
1000
10000
100000
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2
Current as a multiple of the trip-point setting
D
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Curve 8200
Curve 6800
Curce 5600
Curve 4700
Curve 3900
Curve 3300
Curve 2700
Curve 2200
Curve 1800
Curve 1500
Curve 1200
Curve 1000