S&C Vista - Page 60

60 S&C Instruction Sheet 681-530
Table 18. Vista Coordination - Main
Time Overcurrent Phase Protection
Inverse Segment Main
Ampere Rating
600 900/1200
25, 30, 40, 50, 65, 80, 100, 150, 200,
250, 300, 350, 400, 450, 500, 600,
700, 800
30, 40, 50, 65, 80, 100, 150, 200, 250,
300, 350, 400, 450, 500, 600, 700, 800
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