Eaton Digitrip 3000 series - Page 63

DT3000 Instruction Leaflet
I.B. 17555D Effective: Date 07/02 Page 59
For more information visit: www.cutler-hammer.eaton.com
Supersedes I.B. 17555C dated November 1999
Figure 7-18 IEC-C Extremely Inverse Curves (SC-6690-96)
0.01
0.10
1.00
10.00
100.00
1000.00
1 10 100
Multiple of Pickup Current (I/I
pu
)
Trip Time (seconds)
0.7
0.05 0.15
1
0.5
0.3
0.2
0.1
Adjustable Time Multiplier (0.05………1.00)
Tolerance: Time Multiplier Tolerance is ± 10% or ± 0.09 s,
whichever is larger (>1.5 x I
pu
)
For Ground Pickup <0.2
pu
: trip time tolerance is ±15%
Minimum Trip Time is 2 power line cycles
Time
Multiplier