Parameter
Range
Inverse time over-current
Latch
Not enabled, Enabled
Enabled
Alarm action
Trip [Breaker]
Standard inverse time over-current curves
The controller includes these standard inverse time over-current curves, in accordance with IEC 60255.
Table 3.40
Parameters for the inverse time over-current curves
Curve name
k
c
alpha (α, or a)
IEC inverse
0.14 s
0 s
0.02
IEC very inverse
13.5 s
0 s
1
IEC extremely inverse
80 s
0 s
2
IEEE moderately inverse
0.0515 s
0.114 s
0.02
IEEE very inverse
19.61 s
0.491 s
2
IEEE extremely inverse
28.2 s
0.1217 s
2
Custom characteristic
Customisable
Customisable
Customisable
DESIGNER'S HANDBOOK 4189340911K UK
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