AC-PRO
®
& AC-PRO-II
®
B-292 Secondary Injection Test Set Instruction Manual Rev 1.1
www.utilityrelay.com
Page 24
Long Time (LT) Pick-Up
150% ST Pick-Up
OFF & 100A steps
Short Time (ST) Pick-Up
ST I
I Pick-Up
OFF & 100A steps
Instantaneous (I) Pick-Up
150% to 1200% of LT Pick-Up
150% to 1200% of LT Pick-Up
20% to 100% of CT Rating
5A steps
Current in Multiples of Long Time Pick-Up
20X
2X
.01
150%
1X
I Pick-Up
6X
4X
1200%
10X
.
.40sec
.15sec
.20sec
.30sec
2
.10s
I
ST I
T OFF
2
.1
.5
.07sec
T ON
.07s
I
T
ON
T
ON
2
.10sec
2.0s
S
E
C
O
N
D
S
1
10
.40s
I
.20s
I
T
ON
.15s
I
T
ON
T
ON
2
2
.30s
I
T
ON
2
2
.
.
S
E
C
O
N
D
S
& without I
ST Delay with
2
T
1
1200% ST Pick-Up
1
600% LT Pick-Up
@ 600% LT Pick-Up
20X
LT Delay
100
2.0 to 30.0 sec.
0.5 sec. steps
30s
2X
1000
1X
6X
4X
10X
1
1
(0.5A steps for CTs < 225A)
(1000A steps for CTs > 5000A)
(1000A steps for CTs > 5000A)
2
(50A steps for CTs > 5000A)
(10A steps for CTs < 225A)
(10A steps for CTs < 225A)
Figure 9: AC-PRO Overload TCC
