S&C Instruction Sheet 695-535 49
Overcurrent Control Settings
Table 13. IEEE Curves
Time Overcurrent Phase Protection
Inverse Segment
Standard Inverse (U1)
Very Inverse (U2)
Extremely Inverse (U3)
Long-Time Inverse (U4)
Short-Time Inverse (U5)
Minimum Trip Current, A 14 to 12500 in steps of 0.01
Low-Current Cutoff, A●
14 to 12500 in steps of 0.01
Time Multiplier 0.5 to 15 in steps of 0.01
Time Adder, s 0 to 1000 in steps of 0.01
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
0.001
● Low-current cutoff must be equal to or greater than the minimum trip current.
■ 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 Reset Time has elapsed.
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