- 28 -
Custom Protection Curves
CPM 310 G Special Curves include inverse protection curves for electromechanical relays, constant
time characteristic and reset curves. These curves are listed below.
1. SA Semic: Semiconductor Protection Curve.
2. SB DI: Definite Inverse Curve.
3. SC CO2: Short time Inverse Curve.
4. SD CO8: Long Time Inverse Curve.
5. SE CO-C3H: Standard Inverse Curve.
Universal trip time delay formula is given above, while special curve parameters are given on the
below table.
t Trip delay (s).
A A constant for the characteristic (s).
I Momentary current (A).
Is Set current threshold (A).
α A constant for the characteristic (-).
B A constant for the characteristic (s).
TMS Time Multiplier Setting (-). □
To Next Page
Loading...
Need help?
General
