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What are the required elements (CT /PT Requirements) to acheived sensitive earth fault protection in a general primary distrubution circuits?
CT (Current Transformer ) ratio is depends on rated full load current / control current. normally 5A for secondary.
PT (Potential Transformer ) ratio is depends on rated primary voltage / control voltage. normally 110V for secondary.
Accuracy class & VA Burden needs to be checked as per application.
Where can i accomidate (arrangement of IT's) CT & VTs to detect the fault in circuit?
Is 5P20 CT Core is enough to detect the fault / Class X core required?
Dear,
At the input of the feeder terminal you can connect ct / pt .
5P10 / 5P15 would also be enough , but all that depends upon the fault levels.
What is the size of feeder ? rating of transformer ? length of feeder ?
33 kV 2500A Feeder (600 mm width x 1200 mm depth X 2700 height)
X mer rating : 100 MVA
Length : form X mer is 5 meters
Sensitive Earth Fault Protection
Re: Sensitive Earth Fault Protection
