GE D60 Instruction Manual page 330

5.6 GROUPED ELEMENTS
The undervoltage delay setting defines the family of curves shown below.
where: T = operating time
D = undervoltage delay setting (D = 0.00 operates instantaneously)
V = secondary voltage applied to the relay
V = pickup level
pickup
5
At 0% of pickup, the operating time equals the
NOTE
5-196
D
T --------------------------------- -
=

1 ------------------
–

V
pickup
% of voltage pickup
Figure 5–109: INVERSE TIME UNDERVOLTAGE CURVES
UNDERVOLTAGE DELAY
D60 Line Distance Protection System
V


842788A1.CDR
setting.
5 SETTINGS
(EQ 5.22)
GE Multilin