Technical Documentation
KSR-Z – Capacitor-Bank Protection Relay
Rev. 04
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10
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36
2.4 Digital Input
Each trip or alarm can be blocked via the DI. This input is detected as active, when there is a voltage
between 50 - 132 VDC. The sensing of the DI can be changed to low active as well. See details at
the table at item 3.3.4.
2.5 Trip characteristic
With the KSR-Z it is possible to select a adjustable delay time or one of 10 tripping characteristics.
For the characteristics please check appendix B.
Following trip characteristics are available:
U1 = U.S. Moderately inverse
U2 = U.S. Inverse
U3 = U.S. Very inverse
U4 = U.S. Extremely inverse
U5 = U.S. Short-time inverse
C1 = I.E.C. Class A
– Standard inverse
C2 = I.E.C. Class B
– Very inverse
C3 = I.E.C. Class C
– Extremely inverse
C4 = I.E.C. Long-time inverse
C5 = I.E.C. Short-time inverse