= +V I V I
Ar ASCr Ai ASCi
4.4.2 SENSITIVE POWER SETTING GUIDELINES
For reverse and low forward power protection, if settings greater than 3% Pn are used, the phase angle errors of
suitable protection class curr
ent transformers will not result in any risk of maloperation. If settings of less than 3%
are used, however, we recommend that the current input is driven by a correctly loaded metering class current
transformer.
The sensitive power protection has a minimum setting accuracy of 0.5% Pn. It uses the In sensitive CT to calculate
single-phase active power. It also provides phase compensation to remove errors introduced by the primary input
transformers.
P14x Chapter 12 - Power Protection Functions
P14xEd1-TM-EN-1 269
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