Interview Question – Variable frequency drives
Here are the most frequently asked interview questions on Variable frequency drives (VFD/VSD). This article aims to cover most of the interview questions on induction motors so as to prepare…
Difference between Transistors and Thyristors
Transistors and thyristors are semiconductors switching devices. They are used for controlling current flow in circuits. They play a very important role in all power conversion devices. In this article…
The difference between kVA and kVAR
The difference between kVA and kVAR is pretty simple. "kVA" is the unit of apparent power whereas "kVAR" is the unit of reactive power. Before getting into the topic, we…
Drawout circuit breaker positions and indications explained
Several operating indications can be seen on the front of an ACB or MCCB. Being an electrician or an engineer it is important that one must understand those indication and…
Difference between BJT and MOSFET
BJT and MOSFET are two types of semiconductor transistors. Even though both of them are transistors, they are different from each other in various aspects. By the end of this…
Difference between resistance and impedance
When we speak about DC electricity, resistance is the term used to refer to opposition to current flow whereas impedance is the term used in AC electricity. Impedance is basically…
Difference between volts and amps | Volts vs amps
Volts and amps or ampere are two measures of electricity. Specifically, voltage is the measure of electric potential difference between two points whereas ampere is the measure of electric current.…
Differences between resistance and resistivity
Understanding the differences between resistance and resistivity is very important as they are closely related. This article aims to bring you clarity on resistance and resistivity by comparing each of…
Ultimate breaking capacity (Icu) and Service breaking capacity (Ics) – IEC 60947-2
Circuit breakers are devices that can protect circuits or loads during overloads and short circuit. The reliability of the circuit breakers during short circuits is determined by Ultimate breaking capacity…
Difference between current transformers and Potential transformers
Current transformers (CT) and Potential Transformers (PT) are instrument transformer types used to step down transmission or distribution line voltages and current to the level that can be measured using…