S&C Vista SD - Page 52

52 S&C Instruction Sheet 695-535
Table 18. Vista Coordination - Main
Time Overcurrent Phase Protection
Inverse Segment Main
Ampere Rating
600
25, 30, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500,
600, 700, 800
Low-Current Cutoff, A●
14 to 12500 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
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
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