Electrical Load Estimation - Electrical Load Calculation in Electrical Distribution
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- Опубликовано: 27 сен 2024
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Thank you very helpful, i don't know if you have more examples but with different types of buildings
Masha Allah good explanation
Please I need help on this assignment
1. A factory 80 m x 15 m is equipped with a total installed power load of 80 kW consisting of the following:
i. Line shafting of two 15 kW, 415 V, 3, 50 Hz slip ring motors
ii. Individual machine drives of four 10 kW, 415 V, 3, 50 Hz slip ring motors and one 12 kW, 415 V, 3, 50 Hz squirrel cage motors.
Assume 0.90 pf and 80% efficiency for the motors.
a. Draw the installation plan approximately to scale indicating the assumed position of the motors.
b. Mark on the plan of the electrical distribution you propose.
c. Estimate the materials requires for the installation
Assalamo Aalikom. Thank you for all of this.
You are welcome :)
At 23:17, why did you divide 0.8 to the total kVA load? Should we always assume that the transformers should just use 80% to supply its load? Is this like an allowance? I know a similar method wherein we multiply 1.25 (similar to dividing by 0.8) to the total current of a load schedule to determine what wire size to be used. Is that a similar way on what you did in this video?
The oil transformer can be only loaded at 80% and the dry transformer only at 90%. These factors are similar to the derating factors in cables and breakers. Hence, the kVA must be divided by factor 0.8 in oil or by 0.9 in the case of the dry transformer. The transformer is not loaded at 100% to avoid overheating.
@@KhadijaAcademy Thanks for this! Does this apply to all countries or are these in the NEC? Can you also make a video on how to familiarize the standards in the NEC? :) Thanks!
Well done sir. Sir i need more example on Load Estimation along with Panels distribution system
true, would be very helpful
Thanks, that's super helpful, May I ask, are you working USA or Canada?
You're welcome. In the first part, that was from my country code "Egypt", the second part is from NEC that is for USA.
In the end, you follow the same steps but using your country code or any international standard like NEC or IEC that is used by your country.
Good video, I have watched until end, it is best if u could provide the value and insert it in table of excel which is comman practice for engineer because engineer will have lot of building to calculate
DID YOU CHANGED THE VIDEO?
What do you mean? You can't change the video once uploaded.
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The is not zee! Open your teeth! put your tongue between the teeth! Blow vibrating air out! This is how you make a th! If you can learn what you are teaching you can learn this as well!
Hey,
Thank you for your feedback! The video is four years ago, since then, I have learned how to pronounce the "Th" correctly. You can check the recent videos :)
If you have any other comments, please let me know :)
Have a nice day.
National Electrical Code (NEC) > Section 220 - NFPA 70.
220.1 Scope. This article provides requirements for calculating branch-circuit, feeder, and service loads. Part I provides for general requirements for calculation methods
can i get the NEC Code in pdf