Winco DGC-2020 - Manual (Page 256)

A-2 DGC-2020 Time Overcurrent Characteristic Curves 9400200990 Rev K
Table A-1. 51 Time Characteristic Curve Constants
Trip Characteristic Constants Reset Curve
Selection
Curve Name
A B C N K R
S1 S, S1, Short Inverse 0.2663 0.03393 1.0000 1.2969 0.0280 0.5000
S2 S2, Short Inverse 0.0286 0.02080 1.0000 0.9844 0.0280 0.0940
L1 L, L1, Long Inverse 5.6143 2.18592 1.0000 1.0000 0.0280 15.750
L2 L2, Long Inverse 2.3955 0.00000 1.0000 0.3125 0.0280 7.8001
D D, Definite Time 0.4797 0.21359 1.0000 1.5625 0.0280 0.8750
M M, Moderately Inverse 0.3022 0.12840 1.0000 0.5000 0.0280 1.7500
I1 I, I1, Inverse Time 8.9341 0.17966 1.0000 2.0938 0.0280 9.0000
I2 I2, Inverse Time 0.2747 0.10426 1.0000 0.4375 0.0280 0.8868
V1 V, V1, Very Inverse 5.4678 0.10814 1.0000 2.0469 0.0280 5.5000
V2 V2, Very Inverse 4.4309 0.09910 1.0000 1.9531 0.0280 5.8231
E1 E, E1Extremely Inverse 7.7624 0.02758 1.0000 2.0938 0.0280 7.7500
E2 E2, Extremely Inverse 4.9883 0.01290 1.0000 2.0469 0.0280 4.7742
A A, Standard Inverse 0.01414 0.00000 1.0000 0.0200 0.0280 2.0000
B B, Very Inverse (I
2
t) 1.4636 0.00000 1.0000 1.0469 0.0280 3.2500
C C, Extremely Inverse (I
2
t) 8.2506 0.00000 1.0000 2.0469 0.0280 8.0000
G G, Long Time Inverse (I
2
t) 12.1212 0.00000 1.0000 1.0000 0.0280 29.0000
F Fixed Time
 0.0000 1.00000 0.0000 0.0000 0.0280 1.0000
 Curve F has a fixed delay of one second times the Time Dial setting.
TIME OVERCURRENT CHARACTERISTIC CURVE GRAPHS
Figures A-1 through A-16 illustrate the characteristic curves of the DGC-2020. Table A-2 cross-
references each curve to existing electromechanical relay characteristics. Equivalent time dial settings
were calculated at a value of five times pickup.