S&C Instruction Sheet 681-530
59
Table 17. Vista Coordination - Tap
Time Overcurrent Phase Protection
Inverse Segment
Tap
Ampere Rating
600
900/1200
15, 20, 25, 30, 40, 50, 65, 80, 100,
150, 200, 250, 300, 350, 400
30, 40, 50, 65, 80, 100, 150, 200, 250,
300, 350, 400
Continuous Current
600
900/1200
Short Circuit, RMS Sym.
Short Circuit, RMS Sym.
12.5 and 16 kA
25 kA
12.5 and 16 kA
25 kA
Low-Current Cutoff,
A
●
14 to 12500 in
steps of 0 .01
14 to 13200 in
steps of 0 .01
28 to 12500 in
steps of 0 .01
28 to 13200 in
steps of 0 .01
Time Multiplier
Fixed = 1
Time Adder, s
N/A
Definite-Time Phase Protection Element #1
Definite-Time Current,
A
■
14 to 12500 in
steps of 0 .01
14 to 13200 in
steps of 0 .01
28 to 12500 in
steps of 0 .01
28 to 13200 in
steps of 0 .01
Definite-Time Time, s
0 – 1000 in steps of 0 .001
Definite-Time Phase Protection Element #2
Definite-Time Current,
A
▲
14 to 12500 in
steps of 0 .01
14 to 13200 in
steps of 0 .01
28 to 12500 in
steps of 0 .01
28 to 13200 in
steps of 0 .01
Definite-Time Time,
s
◆
0 – 1000 in steps of 0 .001
Reset Time Parameters
Reset Type
TIMED
Reset Time, s
▼
0 to 1000 in steps of 0 .01
●
Low-Current Cutoff must be equal to or greater than the ampere rating .
■
Definite time current must be greater than or equal to low-current cutoff and/or the minimum trip current .
▲
Definite Time Current 2 should be greater than or equal to Definite Time Current 1 .
◆
Time should be less than Definite-Time 1 .
▼
Accumulated value will reset to zero after the reset time has elapsed .
Overcurrent Control Settings
