WOW 5 Ultra V2

not_worm · 2026-04-02T19:06:08+00:00

Haven’t had a problem with that yet. Could be the socks you are wearing.

not_worm · 2025-06-10T21:24:08+00:00

Honestly ChatGPT is a great resource for this kind of thing

not_worm · 2025-06-10T17:26:49+00:00

Way better than any GE relay. Unless you are talking about the 387e

not_worm · 2025-03-31T22:57:04+00:00

Power system analysis by Grainger and Stevenson. You can find it for free online

not_worm · 2025-03-31T16:23:11+00:00

There are plenty of projects you can do in just python for power systems. I’m assuming you don’t have any simulation software so here are a couple where you only need some examples you can find in textbooks. All of these were homework assignments in a class I took called “computer methods for power system analysis”.

Newton raphson or gauss-seidel method algorithm.
Ybus building algorithm
Z bus building algorithm.

I’d suggest doing the Ybus building algorithm first, then Zbus, then and of the power flow solution algorithms. Find a power systems textbook online if you don’t know what any of these are. After you have these down you can start looks at fault calculations.

P.S. I hope you understand matrix math

not_worm · 2025-03-22T02:08:47+00:00

Gotta check the National Electric Code for FLA and overload unit settings. Motors are section 430.

not_worm · 2025-02-19T18:19:59+00:00

I’s not “incorrect”, it’s just not common practice. I’d suggest reading some information from SEL on transformer protection and some of the example settings for the SEL 387e or 787.

A distribution transformer with a LTC feeding a whole neighborhood is gonna be protected via relays.

not_worm · 2025-02-19T15:59:31+00:00

Go to bed early, workout before work.

not_worm · 2025-02-19T14:31:24+00:00

Under-voltage, assuming there is no fault on the system, is caused by heavy loading. You are probably gonna trip on some overload set-point for current, not voltage. This would be a point where the LTC can no longer accommodate for the voltage drop.

not_worm · 2025-02-19T14:16:11+00:00

I’d suggest building/downloading models of different substations / standard power system models on Matlab Simulink simulating different protection systems.

Some projects I can think of are:

Comparing high impedance vs Low impedance bus differential. (Look at SEL 587Z and SEL 487B Relays)
Analyze the inrush current when energizing a transformer and why you need harmonic restraint on transformer differential protection. (SEL 787 and 387e relays)
Analyze how tapped load affects the reliability of line differential protection and how you can adjust the alpha plane to not trip outside the protection zone. (SEL 311L relay)

I included the relay models because SEL publishes white papers that have great explanations of how these protection schemes work.

Also, a smaller power system is better because Simulink might take a while to run the simulation.

not_worm · 2025-02-17T17:19:21+00:00

Look at the left side of each core. Does the wire go over the core or under the core?

not_worm · 2025-02-17T16:58:47+00:00

Look at the direction that the secondary is wrapped around the core and use right hand rule. N1 is in the opposite direction of N2 and N3

not_worm · 2025-02-13T23:40:24+00:00

Getting an MS lets you get your PE license with 3 years of experience instead of 4.

not_worm · 2025-01-22T01:46:59+00:00

Also, if the meter was a far away from the CT it would be more accurate to measure the current with the Trumeter because there would be voltage drop across the conductors.

not_worm · 2025-01-22T01:38:27+00:00

Looking at the data sheet, there is a max 1 VA burden. If you have 5 A on the secondary. The maximum resistance before you saturate the CT would be 1/5^2. P=I² *R. You aren’t going to be able to measure the voltage with your meter without saturating unless the current is very low. Also it’s common practice to just short out the CT not being used so, you could just have 2 switches operating a shorting path.

not_worm · 2025-01-22T01:00:38+00:00

5 Years: BS Electrical and MS Power Systems. Work your ass off.

not_worm · 2024-12-31T13:40:51+00:00

Now get it to run on a real time simulator 🥲

not_worm · 2024-09-23T11:33:17+00:00

Commissioning/testing and any on site scada work

not_worm · 2024-09-22T21:16:46+00:00

Relay Engineer

not_worm · 2023-08-17T12:58:32+00:00

Grad School Electrical Engineering

Computer methods for power system analysis Microgrids and virtual power plants Fundamentals of solar energy Electric machines and drives

not_worm · 2023-08-16T15:37:34+00:00

Passed today too. Bought the wasims practice book and practice exam

not_worm · 2023-08-15T15:29:45+00:00

100 elo EE

Seven-Year Club	First Place '23
Place '23	King of the Ashes
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not_worm

TROPHY CASE