7SR210 & 7SR220 Description of Operation
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3.19 Power Protection: Power Factor (55) – 7SR22
Two power factor elements are provided.
Gn 55-n Setting
sets the pick-up power factor of the element.
Under-power factor or over-power factor operation can be set by the
Gn 55-n Operation
setting.
Gn 55-n 1ph/3ph Power allows the settings to be based on any one phase power factor or the average power
factor of all three phases.
An output is given after elapse of the
Gn 55-n Delay
setting.
Operation of the power factor elements can be inhibited when:
The measured current is below the
Gn 55 U/C Guard
setting
A VT Fail condition is detected
Inhibit 55-n
A binary or virtual input.
Figure 3.19-1 Logic Diagram: Power Factor Protection (55)
Содержание Argus 7SR21
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