Write short note on D-range contactors
D-Range contactors: Contactors are available in rating 9A to 80A in 4 frame sizes providing selection of exact power in...
Write short note on Auxiliary contacts & Coil selection criteria
(1)Auxiliary contacts selection criteria: How many required in either normally open (NO) or normally closed (NC) format Possibility of time...
Write short note on Main pole selection criteria
How many required in either normally open (N/O) or normally closed (NC) format? Current rating in amps. Voltage rating in...
What is Star Delta Starter also Explain
The start delta starting is a very common type of starter and extensively used, compared to the other types of...
What is necessity of using series reactors in power system
Necessity of using series reactor in power system : The reactance of a series reactor should not decrease under short...
What is Feeder Reactor and its disadvantages
When the reactors are connected in series with each feeder they are known as feeder reactor. In case of fault...
What is Generator Reactor and its disadvantages
Depending on the locations reactors used in power system used classifieds as (1)Generator Reactor: When the reactors are connected in...
Write short note on Current Limiting Reactors
Current Limiting Reactor if the capacity of casting system increases or if the fault current is large then the existing...
What is the chemical composition of cement.
The raw materials used for the manufacture of cement consists mainly of lime, silica, alumina and iron oxide. Following table...
What is Sulphur Hexafluoride Circuit Breaker.
In such breakers, sulphur hexafluoride (SF) gas is used as the are quenching medium. The SF, is a electronegative gas...
