LV motor protective device settings (video tutorial)

February 16th, 2017 | Make a comment | Posted in Electrical software
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Your fellow electrical engineer Jesús Pérez Díaz is back with a great new article featuring a video tutorial (ETAP software). Enjoy!

LV MOTOR PROTECTIVE DEVICE

250 hp WEG motor / HMCP Cuttler Hammer / Overload Relay Schneider Electric

Hello everyone! In this article I want to show you how to determine the protective device settings of a typical and simple protection scheme usually applied to low voltage motors, considering the electrical protection basis and using ETAP (Electrical Transient and Analysis Program)to build the time-current curve.
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Preparation and Benefits of Electrical Load Schedule

February 10th, 2017 | Make a comment | Posted in Electrical distribution
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megaphone-darkbluePreparing a load schedule helps in determining the amount of power required for an installation. This information is then used by electrical engineers to properly size conductors, conduits and determine the proper overload and other protection and control systems.

Let your fellow member A.N tell you about it and don’t hesitate to send us a mail if you want to be published in the blog too!

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Daylight Saving Time would be finished soon

February 6th, 2017 | Make a comment | Posted in Others
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Read this short essay by one of the electrical engineer following this blog. Will Daylight Saving Time (DST) be finished soon? Here is his oopinion on the subject. You too tell us what you think in the comment area below.

Lighting new generation

Many people believe that with new improvement in low energy light producing (LEDs), the Daylight Saving Time (DST) would not be applied soon and would become an old-fashioned thing.

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Asynchronous motor starting system

February 3rd, 2017 | Make a comment | Posted in Energy Efficiency - motors
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megaphone-redNew guest article today by A.N. abotu motor starting systems. If any remarks or questions are welcomed, write a comment below.

The asynchronous motors are used for a wide range of applications. They are used in industrial processes, commercial buildings, recreational areas, at home, and other areas.

However, if motor is switched on directly from the mains supply, it draws a very high initial current. The current at startup is usually between five and seven times what the motor normally draws at full load, but only develops a torque of between 1.5 and 2.5 times the torque at full load.
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Checking phase sequence of 3 phase supply

January 26th, 2017 | Make a comment | Posted in Energy Efficiency - motors
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megaphone-blueToday, let’s read a guest post written by A.N, one of our loyal fellow electrical engineer. Since the end of year 2016 he has published articles quite often in the blog and we thank him. If you want to do like him, please send us mail.

The correct phase sequence is required for the proper operation of any three phase system. It ensures that the load works as desired, when incorrect, the equipment such as the motor may malfunction, rotate in the reverse direction. The phase reversal may damage the motor or the equipment the motor is driving.

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