Basler DGC-2020 Instruction Manual page 196

Curve
Curve Name
Selection
S1 S, S1, Short Inverse
S2 S2, Short Inverse
L1 L, L1, Long Inverse
L2 L2, Long Inverse
D, Definite Time
D
M M, Moderately Inverse
I1 I, I1, Inverse Time
I2 I2, Inverse Time
V1 V, V1, Very Inverse
V2, Very Inverse
V2
E1 E, E1Extremely Inverse
E2, Extremely Inverse
E2
A A, Standard Inverse
B B, Very Inverse (I
C C, Extremely Inverse (I
G G, Long Time Inverse (I
Fixed Time ∗
F
∗ 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. A drawing number is provided in the caption of each
graph.
A-2
Table A-1. 51 Time Characteristic Curve Constants
A
0.2663
0.0286
5.6143
2.3955
0.4797
0.3022
8.9341
0.2747
5.4678
4.4309
7.7624
4.9883
0.01414
2
1.4636
t)
2
8.2506
t)
2
12.1212
t)
0.0000
DGC-2020 Time Overcurrent Characteristic Curves
Trip Characteristic Constants
B C
0.03393 1.0000 1.2969
0.02080 1.0000 0.9844
2.18592 1.0000 1.0000
0.00000 1.0000 0.3125
0.21359 1.0000 1.5625
0.12840 1.0000 0.5000
0.17966 1.0000 2.0938
0.10426 1.0000 0.4375
0.10814 1.0000 2.0469
0.09910 1.0000 1.9531
0.02758 1.0000 2.0938
0.01290 1.0000 2.0469
0.00000 1.0000 0.0200
0.00000 1.0000 1.0469
0.00000 1.0000 2.0469
0.00000 1.0000 1.0000
1.00000 0.0000 0.0000
N K
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
0.0280
9400200990 Rev I