In a synchronous motor armature current flows due to
revolving flux which in turn rotates the load,but in no
load condition armature current is zero hence thr is no
revolving flux then how motor rotates?
Answer Posted / phani
Due to residual magnetism some flux will be developed.
| Is This Answer Correct ? | 3 Yes | 1 No |
Post New Answer View All Answers
How to calculate wire length,size & current? ( related to control panel)
what is the criteria for selecting fuse rating in 1phase, 2phase & 3phase welding sets?
while doing high potential for 11KV 3 core cable how much leakage current will obtain?, what will be acceptance value?
Name the test signals used in control system
Stator of 3-phase IM has 3 slots per pole per phase. If supply frequency is 50 Hz, calculate the speed of rotating stator flux A 1000 rpm B 500 rpm C 1500 rpm D 1440 rpm
I want to merge a cable..in between two metering Cubicals which contains CT's and PT's and Energy meter..before taking merger..what are the common things required?
How i can decide that HVDC line is best for transmission.
what are the assumptions made in swineburne's test?
I HAVE BEEN SELECTED FOR APGENCO A.E(ELECTRICAL) 2008.HOW MUCH WEIGHTAGE FOR INTERVIEW AND WRITTEN TEST.HOW I HAVE TO PREPARE. PLEASE GIVE INFORMATION IF U KNOW.WHAT ABT G.D THIS TIME.CALL RATIO 1:2
what is RFID? thire application;
In cable sizing calculation (determining the max route length of cable) why we choose the shortest length between cable length of full load current Iflc & starting current Istart?
why high speed tripping relay is used in protection circuit why not normal relay
Dear sir, In our plant have Station Transformer having capacity,i want to know, why LV side 40 - 40MVA is given? & how we can get 6.3 KV supply from tertiary(i.e. Open delta connection), Vector Group YNyn0 - yn0 +d MVA Rating 80MVA / 40 - 40MVA + 26.7MVA Voltage rating 420 (Tap range +6,to -10)81.25% /11.5KV - 11.5KV +6.3KV
3Cx240 & 3Cx300 sqmm Al. cable from lv side. What is the calculation for this cable??
what is the maximum temperature rating of a thhn insulated conductor?