Showing posts with the label Voltage

What is an energy management system?

An Energy Management System (EMS) is a strategic methodology employed to efficiently manage and opt…

What is Voltage Standing Wave Ratio(VSWR) in Radio Frequency?

Standing waves are an important issue when looking at feeders / transmission lines, and the standin…

Why is voltage dropped from 220V to 185V?

Distance plays in part as the resistance of the wire increases with it’s length. I will assume bein…

Why is the resistance of DC equal to resistance of AC?

Resistance to AC is only the same as DC in a purely resistive circuit. Something like a heating ele…

Why do we use Aluminum to substitute Copper in transmission lines?

Aluminum is very close to the conductivity of copper, about 1.6 times as much resistance per foot f…

why don't big airplanes use DC electricity?

There are two problems with DC that are rarely discussed but very important. 1 - Electric arcs. I…

Why don't we use DC supply in our homes?

Thomas Edison thought we should use DC. Nikola Tesla thought we should use AC. There was a great …

Why does Power Unit of AC use KVA and DC use KW?

AC power is an alternating sine wave (or some other repeating wave form that hopefully resembles a …

Understanding Measuring Volts and Amps in electrical cable and device

The type of instrument to be purchased for general use in the electrotechnical industries is a diff…

Why are overhead high voltage power lines not insulated?

Overhead high voltage power lines are not just a simple copper wire but it is actually a combinatio…

What is Electric shock and How to Prevent it?

Electric shock occurs when a person becomes part of the electrical circuit , as shown in picture . …

What is Protective electrical bonding to earth?

The purpose of the bonding regulations is to keep all the exposed metalwork of an installation at t…

Load More That is All