Answer Posted / ravimenon
The number of cycles produced per second is called as
frequency.The unit is hertz(Hz)The frequency in india is
50Hz
| Is This Answer Correct ? | 10 Yes | 5 No |
Post New Answer View All Answers
How to measure power in 2 or 4 or n phase circuit? Please give me a formula.
WHAT SHOULD BE THE BEST CURRENT RATINGS (PRIMARY / SECONDARY)FOR A CT INSTALLED AT THE INCOMING 11KV PANE? WILL IT BE CALCULATED ON THE BASES OF MAXIMUM DEMANT VALUE OR ON SUM OF ALL TRANSFORMER'S KVA? NOMALLY MAX DEMAND REPRESENT THE MAXIMUM OPERATING LOAD OF THE PLANT AND TOTAL KVA OF (SAY 5 NUMBERS TRANSFORMERS) REPRESENT THE CONNECTED LOAD. WHICH i.e. MAX DEMAND KVA OR CONNECTED KVA ARE BETTER TO USE FOR CT CURRENT CALCULATION? PLEASE ANSWER.
why constant voltage transformer should be start without load? and if started then what will happen?
what is current check gurd relay?
what is the safty of poly phase tranformer?
what is the minimum recommended leakage current of an earthed cable connected to the body or skid of an alternator
The height to which the liquid in a tank to be maintained for a certain constant velocity?
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
are there rmu for 3 transformer?
Which motor connection is preferable star-delta or delta-star?
what happens in the short circuited secondary transformer,if the resistance of the short circuit is increased gradually?
if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?
How is the percentage impedence of a transformer fixed at design stage???
what is meant by re-rolling motor? how it differs from standard motor?
What is conventional thermal current (Ith)
