3.3 APPLICATION NOTES
3.3.1 SETTING GUIDELINES
The residual voltage setting, CTS VN< Inhibit and the residual curr
ent setting, CTS IN> Set, should be set to avoid
unwanted operation during healthy system conditions. For example:
● CTS VN< Inhibit should be set to 120% of the maximum steady state residual voltage.
● CTS IN> Set will typically be set below minimum load current.
● CTS Time Delay is generally set to 5 seconds.
Where the magnitude of residual voltage during an earth fault is unpredictable, the element can be disabled to
prevent protection elements being blocked during fault conditions.
P14x Chapter 15 - Supervision
P14xEd1-TM-EN-1 349
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