Instruction Leaflet
DT3000
Page 8
Effective: Date 07/02
I.B. 17555D
For more information visit:
www.cutler-hammer.eaton.com
Supersedes I.B. 17555C dated November 1999
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
±10%
See Notes 1, 2 &
3
IECA SC-6688-96
IECB SC-6689-96
IECC SC-6690-96
IECD SC-6691-96
NOTES:
1.
Curves go to constant operating time above 30 X In.
2.
Tolerance: ± 10% or 0.09 seconds, whichever is larger (>1.5 x I
pu
). Minimum trip time is 2 power line cycles.
3.
For IECD, the Time Multiplier Tolerance is ±0.05 seconds.
Phase Short Delay Pickup:
The available pickup settings, shown below, range from 1 to 11 times (I
n
) or NONE. If NONE is
selected, the short delay protective function is disabled.
Phase Element Short Delay Pickup
Available Settings
Tolerance
Curve #
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
± 10%
SC-5394-92B
Phase Short Delay Time:
The available time settings, shown below, range from 0.05 to 1.5 seconds at currents equal to or
above the short delay pickup setting selected. If NONE was selected for the Phase Short Delay Pickup Setting, the relay will
bypass requesting the time setting.
Phase Element Short Delay Time (in seconds)
Available Settings
Tolerance
Curve #
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
± 0.05 seconds
SC-5394-92B
Phase Instantaneous:
The available pickup settings, shown below, range from 1 to 25 times (I
n
) or NONE. If NONE is
selected, the instantaneous protective function is disabled and a choice of whether to turn the discriminator option on (DON) or
off (DOFF) is offered. The discriminator is a true making current release. When the circuit breaker closes, the discriminator
function, if selected to be on, is functional in an instantaneous trip mode for 10 cycles after the breaker closes. The breaker will
trip instantaneously via the discriminator, if the fault current is above 11 times (I
n
). After the 10-cycle period has passed, the
discriminator will no longer be functional. It becomes functional again only when the breaker opens and then is re-closed.
Type Setting
Available Settings
Tolerance
Curve #
INSTANTANEOUS PICKUP
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, 12.5, 15.0, 17.5, 20.0,
22.5, 25.0, NONE
± 10%
SC-5396-92B
DISCRIMINATOR
(IF PHASE INST SET TO NONE)
D ON Fixed At 11 x In
D OFF
+10%
Ground Fault:
After the phase instantaneous setting is established, the ground curve shape, the ground inverse time
overcurrent pickup, ground inverse time overcurrent time, ground short delay pickup, ground short delay time and ground
instantaneous settings are selected. The available settings are shown below. Note that the ground curve settings are
independent of the phase curve and are programmed separately.
Programming the ground settings is done in the same manner as the phase settings, except there is no discriminator option for
ground instantaneous, and there is a NONE selection for the inverse time overcurrent pickup setting.
Ground Inverse Time Overcurrent Pickup:
The available pickup settings, shown below, range from 0.20 to 2.2 times (I
n
).
Ground Element Inverse Time Overcurrent Pickup –
Available Settings
Tolerance
Curve #
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
+ 5%
