Utility Relay Company AC-PRO-II, Instruction Manual

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AC-PRO-II
®
Instruction Manual www.utilityrelay.com
Page 42
200% 100% 500% 1000%
.1
.5
2.0s
S
E
C
ON
DS
1
10
600% NOL
@ 600% NOL Pick-Up
NOL Delay
100
2.0 to 30.0 sec.
0.5 sec. steps
30s
1000
Current in Percent of NOL Pick-Up
100% 200% 500% 1000%
Pick-Up
Neutral Overload (NOL) Pick-up
5A steps for CTs > 225A
0.5A steps for CTs < 225A
Neutral CT Secondary Rating 0.5A and above
20% to 200% of CT Rating
Neutral CTs Secondary Rating below 0.5A
50% to 200% of CT Rating
AC-PRO-II NOL Rev 1.2 07/14/2015
NOL ends
at 1200% of CT
Rating.
Figure 18.3: Neutral Overload (NOL) TCC