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Answer Posted / farrukh
circuit breaker save the main circuit at unwanted
conditioin .such as high voltage,
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DEAR SIR,I GOT THE CALL LETTER FROM RRB, SECUNDERABD AS A JE-II SO PLEASE PROVIDE ME SOME MODEL QUESTION AND ANSWER PAPERS AND LAST YEAR QUESTION PAPERS
What is earth?
why the making current is more than then the breaking current and if its true then its about a controling circuit or breaker power contact points
As we use capacitor bank in 3ph ckt to improve PF, can we use capacitor in single ph domestric use, in house we have Fan,Mixer,electric cooker,iron,tube choke they also lag the system,because it is inductive load. if it is possible to improve PF of single ph system-- if yes- type of capacitor to be used,connection diagram, working in detail. if no-- list it.
i am an maintenance engineer. one distribution board have 5 feeder. recently its ELR trips frequently, but it take some times after trip( 10min,20min..)but 3 feeder no load. two feeder only loaded. i checked one feeder IR value all values are above 50Mohm.but B phase to Earth is only 9Mohm.any problem about low value
why the earth is taken minimum in supplying? wather it the proportional factor to getting work any equipment or a power plant?
What is the function of under voltage release ?
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How to select the cable and voltage drop in circuit?
how to calculte capacitor range for single phase induction motors??pls tel
Why we find the sensitivity for the CT's to check?
What are the different types of controllers?
What are the no-load losses for the 11000/415V transformer with the following rated capacity? 1.1500 kVA 2. 2000 kVA 3. 2500 kVA 4. 3000 kVA
In AC if the direction of current keeps reversing every half cycle, how does it propogate through the transmission lines?
Draw a SLD for main panel for school having connected load of 1200kw and emergency generator 200kw.also show the increase of additional load of chiller 225kw in the lv panel indicating meter postion size of transformer ,cables and capacitor bank.
