S&C Vista SD - Page 51

S&C Instruction Sheet 695-535 51
Table 17. Vista Coordination - Tap
Time Overcurrent Phase Protection
Inverse Segment Tap
Ampere Rating
600
15, 20, 25, 30, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400
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