Finally a TH-cam account for my job! There are a few others out there but you have a real personal touch and have been hitting very relevant topics. Keep up the good work brother! I’d love to help out if you need anything
You mention in your video in passing that "we short windings for power factor but not for Megger"... Would you mind elaborating? Ty ...I am Nicet lvl 2.
That's actually a great question with a long-winded answer (maybe worthy of its own video). The short version is that the megger or DC insulation resistance test uses DC which flows through the winding. Power Factor is an AC test; there's a significant amount of inductive impedance between phases at 60Hz, so to penetrate the winding with your test voltage you have to short them to apply the same voltage on each phase to cancel out most of the impedance between phases. When we're performing the megger test, we're applying DC so there isn't any inductive impedance. XL=2πfL so if f=0 then XL=0.
They provide a formula sheet which covers almost everything. There were at least two questions on the level 4 exam I took that didn't have a formula provided though.
Finally a TH-cam account for my job! There are a few others out there but you have a real personal touch and have been hitting very relevant topics. Keep up the good work brother! I’d love to help out if you need anything
Thanks so much for your support! I'll keep them coming!
Awesome information! Thanks for making this video.
Glad it was helpful!
You mention in your video in passing that "we short windings for power factor but not for Megger"... Would you mind elaborating? Ty ...I am Nicet lvl 2.
That's actually a great question with a long-winded answer (maybe worthy of its own video).
The short version is that the megger or DC insulation resistance test uses DC which flows through the winding. Power Factor is an AC test; there's a significant amount of inductive impedance between phases at 60Hz, so to penetrate the winding with your test voltage you have to short them to apply the same voltage on each phase to cancel out most of the impedance between phases. When we're performing the megger test, we're applying DC so there isn't any inductive impedance. XL=2πfL so if f=0 then XL=0.
please how i can get study plan for NICET Level 01 and if Exam of NETA is same of NICET?
Great breakdown, and very thorough!
Much appreciated!
Are you allowed to have the math formulas in front of you while you take the test? I don’t know how I’d remember all of them off the top of my head
They provide a formula sheet which covers almost everything. There were at least two questions on the level 4 exam I took that didn't have a formula provided though.
"Senior Power Station Electrician" + Fort Belvoir = 12P
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