why transformer is conneted to dc for polarity test.it
doesnt work in dc?
Answer / shyam
polarity can be checked with ac also. but it needs phase
angle measurement. with a dc we can observe +ve/-ve
deflection on galvanometer(u can use ma dc analog meter,
dont use digital meter which will have more response time).
apply dc at low voltage for msec time(flick only) otherwise
ct may saturate. please read CPC100 manual of omicron for
further knowledge.
| Is This Answer Correct ? | 5 Yes | 0 No |
PLZ SEND ME SOME UNIQUE PROJECT OF ELECTRICAL ENG (B.TECH)
what parameters should we check to reduce the power bill
What is FTA card? How it works?
What is the need of motor starter?
What is the specification of service line (ie from electrical post to cut out) used by electricity boards used in india.i mean which material,its size etc.. please give the answer at lalkishan.p@gmail.com
IF HT CAPACITOR IN ON POSITION IS THERE ANY LOSSES I.S I SQURE OCCURS IN THE SYSTEM
Why does the phase voltage of two healthy phases become equal to the line voltage in case of an ungrounded neutral 3 phase star connected sytem when a single line to ground fault occurs ?
What are the factors which influence the choice of specific magnetic and electric loadings of a synchronous machine?
What is Dry type transformer.How it works
why we step down the voltage from 440 to 220 in machines
what is the Connected Load (kW) or Contract Demand (kVA)of mahindra nasik plant??
CAN CU XLPE/PVC CABLE BE USED INPLACE OF LOW NOISE SCREENED CABLE? KINDLY GIVE REASONS
Civil Engineering (5086)
Mechanical Engineering (4456)
Electrical Engineering (16639)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)