Advantages & Disadvantages of Variable Speed Drives
Variable Speed Drives (VSDs) are employed in the industrial applications where different speeds are require to operate certain process systems. VSDs consists of rectifying unit for converting ac to dc,…
Difference between Current Transformer and Potential Transformer
Current Transformers (CT) and Potential Transformers (PT) are used to measure the current and voltage in a circuit of the order of hundreds of amperes and volts respectively. A CT…
Electrical Contactor, Switch, Circuit Breaker
An Electrical Contactor is a switch. In simple words contactor is a switch which closes its contacts with the help of relay. Most of the contactors operate by electromagnet, thus…
Insulating Material for Cable Requirements
The life and satisfactory operation of a cable depends to a great extent upon the characteristics of the insulation employed. So the proper choice of the insulating material for the…
Advantages & Disadvantages of Fuse in a Electrical Circuit
Fuse is the cheapest protection device in electrical circuit against short circuits and overloading of circuits. Fuse is a metal wire or thin metal strip which has the property of…
Advantages of Valve Regulated Lead Acid (VRLA) Batteries
Valve Regulated Lead Acid (VRLA) Batteries are popularly termed as maintenance free lead acid batteries. Each cell in VRLA battery will have a value (automating operating) to allow the gas…
Current Limiting Reactors in Power System
Current Limiting Reactors are connected in series with the power system essentially to damp the short circuit fault current. During normal operation, a continuous current flows through the reactor. Current…
Circuit Breaker Interview Questions & Answers
What is a Circuit Breaker? Circuit Breaker is a mechanical device designed to close or open contact members, thus closing or opening an electrical circuit under the normal or abnormal…
Advantages & Disadvantages of Oil Circuit Breakers
Oil circuit breakers are the oldest type of circuit breakers. The separating contacts of the oil circuit breakers are made to separate within the insulating oil which has better insulating…
Ungrounded or Isolated Neutral System Disadvantages
There will be no flow in the zero sequence currents In ungrounded or isolated neutral system there will be little interference with the communication lines because of the absence of…
