9424200994 Rev U
Overvoltage (59) Inverse Time Curve
The undervoltage inverse time curve is defined by Equation 44. The undervoltage inverse time curve with
default constants is shown in Figure 379.
= Time to trip when M ≥ 1
T
T
= Time to reset if BE1-11g is set for integrating reset when M < 1. Otherwise, reset is
T
R
50 milliseconds or less
D = Time Dial setting (0.0 to 9.9)
M = Multiple of Pickup setting
A, B, C, N = Constants for the particular curve
R = Constant defining the reset time.
BE1-11g
=
+
−
Equation 44
=
|
− 1|
2
Equation 45
633
Time Curve Characteristics
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