What is kVA?
kVA stands for kilo volt-amperes. It is basically the unit of apparent power and is the product of RMS values of voltage and current. One kVA is 1000 volt -…
What is meant by plugging a motor?
Induction motors are one of the major power-consuming loads on the planet today and are widely used for all industrial and domestic applications. Plugging is one of the braking techniques…
Generate electricity from electricity – Is that possible?
“Can we generate electricity from electricity?” This is a quite common question that many people ask. The answer for this question is amazingly simple but tricky. We need to understand…
Top 5 differences between fuses and circuit breakers
Short circuits and overloads are abnormal conditions that cause heavy current flow in a circuit. Heavy currents are capable of damaging a device or a circuit and may end up…
Why are overhead transmission lines not insulated?
Overhead transmission lines are not insulated primarily due to three reasons: first and foremost is to reduce the weight of the lines, secondly to save cost and the last is…
Difference between fuse and MCB
Circuit protection devices such as fuses and MCBs are used to safeguard any equipment from damages caused due to short circuits. The usage of these devices does not mitigate the…
Difference between utilization categories AC-1 and AC-3
The utilization categories AC-1 and AC-3 defines making, breaking and continuous operation current rating for contactors. Based on these rating, contactor for switching of resistive loads and switching of squirrel…
How to save on electricity bills?
A few small behavioral changes and other adjustments can help us save electricity as well as electricity bills. By saving electricity we are not only saving money but also saving…
Electromechanical relays vs solid-state relays
Relays are electrically operated switching devices, used to gain control over processes and circuits. Based on their principle of operation they are classified into two types: Solid-state relays and electromechanical…
Difference between earth leakage relay and earth fault relay
Earth fault is an undesirable condition at which current flow from a conductor to earth. This can happen when a current-carrying conductor falls on the ground or the body of…