NETA 2 Exam Questions HELP

Certification Forum NETA Level 2 Exam
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1

Has anyone seen the question on their NETA Exam or have input for advice. the question goes kind of as the following (trying to remember from memory)

" Given the following CT 300:5, what is the minimum pick up current"

They then proceed to give different choices, though I cannot remember them off the top of my head, can someone please give advice.

Another question I have seen is they give Voltage, a Current and an angle.

" 120V, 4A and 30 degrees, what is the KVAR or KW, I can’t remember what is asks completely for the answer, does anyone have any input on calculating these types of problems.

They stump me every time I get them. Thanks in advance!

2

Your first question seems to be missing alot of information. I have seen something more like: "An overcurrent relay is used to protect a feeder, with a CT ratio of 300/5A. The minimum fault current in the feeder at the CT location is estimated to be I(f-min)=950A. What will the primary pickup current of this relay? A)585A, B)665A, C)675A, D)655A " Which you want the relay set to 70% minimum fault current thus 665A.

Second question is know your Power Triangle and the equations associated with it. https://www.electronics-tutorials.ws/accircuits/power-triangle.html

KW = Volts * Amps * Cos (deg)
KVAR= Volts * Amps * Sin (deg)