Why is electricity transmitted at high voltages?
You might have noticed huge towers supporting the high voltage transmission lines in your locality. These high voltage lines transmit electric power generated at power stations which are situated at…
Transformer – FAQ | Interview Questions
How does a transformer work? A transformer is an electric machine that converts AC voltage from one level to another level with minimum power loss. It is based on the…
Why is a transformer rated in KVA?
All electrical devices are rated based on the maximum power it can consume or generate or transfer. When few of them are rated in KW (kilowatts) or watts, few others…
Transformer -FAQ | Interview Questions
What is a transformer? By definition, a transformer is a static electrical device that transforms electric energy from one level to another level. Normally transformers are used to step up…
Why is one of the pins in a three pin plug longer and thicker than the other pins?
Safety is the primary element of any circuit or electrical connection. Whether it is electric iron or refrigerator or any other home appliances, everywhere safety has to be ensured to…
Difference between Neutral and Earth
This article focus on explaining the similarities and dissimilarities between neutral and Earth (ground). Understanding the difference between the neutral and earth may be difficult in the beginning. A Lot…
Difference between over-current and overload
Over-current Any situation in which the current flow through a device or conductor exceeds the desired value is known as over current. Both overload and short circuit can cause excessive…
Difference between Short circuit and overload
Short Circuit A short circuit occurs when two or more current carrying conductors of different phases or different voltage levels or different terminal (in DC circuits) come in contact with…
Why ammeter is connected in series
Ammeter is a device used to measure the current flow through a conductor. The name is derived from the unit of current, Ampere. Ammeter is either connected in series to…
Difference between circuit breaker and isolator
Isolator/ Disconnectors
Isolator or disconnectors, as the name indicates, is a switching or isolation device, intended to disconnect an equipment or electrical Circuit from the supply. It is an offload device, which means it can be operated only when the current passing through it is zero. Unlike circuit breakers, it lacks a built-in arc suppression system. It can be operated only during offload conditions. (more…)