types of motors suitable for escalators with reason
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What is a dc motor?
what is the roll of power factor in induction motor.
What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?
I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase), before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???
Can we check ELCB constantly from R1 to R8 phase in 1 no DB?
what clearance required for 4.5 mva dry type transformer?
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
why 30 ma elcb is used ?why cant 100 ma?
why is use the star and delta connection and difference
what happenes if the core of the transformer saturates?
Why Earthin is not required in Xformer primary side when it is in Star / star?
what will happen reduce the transformer voltage from 415v to 406v, is it save the energy,? are this methodis good to reduce the energy.?
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