DT3000
Instruction Leaflet
I.B. 17555D
Effective: Date 07/02
Page 41
For more information visit:
www.cutler-hammer.eaton.com
Supersedes I.B. 17555C dated November 1999
Figure 7-2b Inverse Time Overcurrent Phase I
2
T Curves (SC-5391-92B)
For
DT 3100 & DT 3101 Users ONLY
0.01
0.10
1.00
10.00
100.00
1000.00
10000.00
0.1
1
10
100
Multiple of In (I/I
n
)
Trip Time (seconds)
5 Seconds at 3 per Unit
40 Seconds at 3 per Unit
0.2 Seconds at 3 per Unit
Minimum Pickup 0.2
Maximum Pickup 1.0
Adjustable Inverse Time Overcurrent Pickup
(x I
n
) (0.2……….1.0)
Adjustable Inverse Time Overcurrent Time
Multiplier (Sec. @ 3 x I
n
) (0.2 s……….40 s)
Tolerance:
Inverse Time Overcurrent Pickup is ±5%
Inverse Time Overcurrent Time Multiplier is
±10 or ±0.09 s whichever is larger
Note: Flat after 30 x I
n
Minimum Trip Time is 0.05 s
