DT3000 Instruction Leaflet
I.B. 17555D Effective: Date 07/02 Page 43
For more information visit: www.cutler-hammer.eaton.com
Supersedes I.B. 17555C dated November 1999
Figure 7-3b Inverse Time Overcurrent Phase, IT Curve (SC-5392-92B)
For DT 3100 & DT 3101 Users ONLY
0.01
0.10
1.00
10.00
100.00
1000.00
0.1 1 10 100
Multiple of In (I/I
n
)
Trip Time (seconds)
0.2 Seconds at 3 per Unit
40 Seconds at 3 per Unit
5 Seconds at 3 per Unit
Minimum Pickup 0.2 Maximum Pickup 2.2
Adjustable Inverse Time O vercurrent Pickup
(x I
n
) (0.2… … … .1.0)
Adjustable Inverse Time O vercurrent Tim e
Multiplier (S ec. @ 3 x I
n
) (0.2 s… … ….40 s)
Tolerance:
Inverse Time O vercurrent Pickup is ±5%
In vers e T im e O vercurrent T im e M ultiplier is
±10 or ±0.09 s whichever is larger
Note: Flat after 30 x I
n
Minimum Trip Time is 0.05 s
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