Eaton Cutler-Hammer Digitrip 3000 Instructions For Installation, Operation And Maintenance page 14

Page 8
TYPE SETTING
CURVE SHAPE
INVERSE TIME OVERCURRENT
PICKUP
INVERSE TIME OVERCURRENT
TIME MULTIPLIER
Ground Time Multiplier setting options
depend upon Ground Curve setting
selection.
SHORT DELAY PICKUP
SHORT DELAY TIME
(In Seconds)
INSTANTANEOUS PICKUP
NOTES: Curves go to constant operating time above 30 X I
Tolerance: ± 10% or 0.09 seconds, whichever is larger. Minimum operating trip time is 0.05 seconds.
Tolerance: ± 10% or 0.09 seconds, whichever is larger (>1.5 x I
For IECD, the Time Multiplier Tolerance is ±0.05 seconds.
For Ground Pickup ≤0.2
TABLE 2.3 CHARACTERISTIC FOR GROUND ELEMENT
AVAILABLE SETTING
2 4
IT, I T, I T, FLAT, MOD, VERY, XTRM,
IECA, IECB, IECC, IECD
0.100, 0.125, 0.150, 0.175, 0.200, 0.225,
0.250, 0.275, 0.300, 0.350, 0.400, 0.450,
0.500, 0.550, 0.600, 0.650, 0.700, 0.750,
0.800, 0.850, 0.900, 0.950, 1.00, 1.25,
1.50, 1.75, 2.00, NONE
2 4
Curve = IT, I T, I
0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55,
0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95,
1.00, 1.25, 1.50, 1.75, 2.00, 2.25, 2.50, 2.75,
3.00, 3.50, 4.00, 4.50, 5.00, 5.50, 6.00, 6.50,
7.00, 7.50, 8.00, 8.50, 9.00, 10.0, 12.5, 15.0,
17.5, 20.0, 22.5, 25.0, 27.5, 30.0, 35.0, 40.0
Curve = FLAT:
0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50,
0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85,
0.90, 0.95, 1.00, 1.25, 1.50, 1.75, 2.00
Curve = ANSI MOD, VERY, XTRM:
0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0,
1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0,
2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0,
3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0,
4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0
Curve = IECA, IECB, IECC, IECD:
0.025, 0.050, 0.075, 0.100, 0.125, 0.150,
0.175, 0.200, 0.225, 0.250, 0.275, 0.300,
0.325, 0.350, 0.375, 0.400, 0.425, 0.450,
0.475, 0.500, 0.525, 0.550, 0.575, 0.600,
0.625, 0.650, 0.675, 0.700, 0.725, 0.750,
0.775, 0.800, 0.825, 0.850, 0.875, 0.900,
0.925, 0.950, 0.975, 1.00
0.100, 0.125, 0.150, 0.175, 0.200, 0.225,
0.250, 0.275, 0.300, 0.350, 0.400, 0.450,
0.500, 0.550, 0.600, 0.650, 0.700, 0.750,
0.800, 0.850, 0.900, 0.950, 1.00, 1.25,
1.50, 1.75, 2.00, 2.25, 2.50, 2.75, 3.00,
3.50, 4.00, 4.50, 5.00, 5.50, 6.00, 6.50,
7.00, 7.50, 8.00, 8.50, 9.00, 9.50, 10.0,
11.0, NONE
0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35,
0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70,
0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 1.25,
1.50
0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80,
0.85, 0.90, 0.95, 1.00, 1.25, 1.50, 1.75,
2.00, 2.25, 2.50, 2.75, 3.00, 3.50, 4.00,
4.50, 5.00, 5.50, 6.00, 6.50, 7.00, 8.00,
8.50, 9.00, 9.50, 10.0, 11.0, NONE
: trip time tolerance is ±15%.
pu
T:
.
n
). Minimum trip time is 2 power line cycles.
pu
I.B. 17555C
TOLERANCE CURVE #
+ 5%
IT SC-5401-92B
±10%
2
I T SC-5400-92B
4
I T SC-5399-92B
±0.05 SEC
FLAT
SC-5402-92B
±10% MOD SC-6685-96
VERY SC-6686-96
XTRM SC-6687-96
IECA SC-6688-96
±10%
IECB SC-6689-96
IECC SC-6690-96
IECD SC-6691 -96
+ 10% SC-5403-92B
+ 0.05 SEC SC-5403-92B
+ 10% SC-5396-92B
Effective November 1999