9424200994 Rev U
uses the "nominal current" setting of the BE1-11g to determine what corresponds to 1 per unit current in
the generator.
When curve 46 is selected, the BE1-11g changes the range of the allowed time dial to 1 to 99 (instead of
the time dial range of 0.1 to 9.9 for all the other curves). The user should enter the "K" factor of the
generator into the time dial field.
BE1-11g Equation
When the 46 function is used, the BE1-11g uses the K factor (i.e., 46 time dial setting), 46 minimum
pickup setting and generator full-load current to create a constant Z (see Equation 38).
The time to trip equation used in the BE1-11g is:
where:
which, when M > 1, reduces to:
BE1-11g
= 46 �
46
Equation 38
=
+ 0.028
2
Equation 39
=
46
Equation 40
= 46 �
2
Equation 41
2
�
2
2
�
Time Curve Characteristics
607
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