User programmable inverse-time characteristics for overvoltage protection - Arc protection - Motor protection - Feeder protection - Back-up protection - Technical Manual - REX610 Protection and control - 1.2 - IEC - ANSI - 17.02.2023

REX610 Technical Manual

The user can define the curves by entering the parameters using the standard formula:
Figure 1. Equation
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t[s]Operate time in seconds
ASet value of Curve parameter A
BSet value of Curve parameter B
CSet value of Curve parameter C
DSet value of Curve parameter D
ESet value of Curve parameter E
UMeasured voltage
U>Set value of Start value
kSet value of Time multiplier