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
A dju s tab le In ve rs e T im e O verc u rr en t P ic ku p
(x I
n
) (0 .2 … … … .1 .0 )
A dju s tab le In ve rs e T im e O verc u rr en t T im e
M u ltip lier (S ec . @ 3 x I
n
) (0 .2 s … … … .4 0 s )
T olera nc e:
In vers e T im e O ve rc urre n t P ic k u p is ± 5 %
In vers e T im e O ve rc urre n t T im e M u ltip lier is
± 10 or ± 0 .0 9 s w h ic h e v e r is larg e r
N ote: F lat after 3 0 x I
n
M in im u m T rip T im e is 0 .0 5 s
