In an ACB shunt trip coil and undervoltage coil operated normally( breaker open and charged). But closing coil not operating untill manually discharge and recharging. Any help.
PPIL,
1752If I have Energy Meter Ratio as 100:5 & Also I have CT Ratio as 50:5 then what will be my multiplying Factor(M.F.)
1970i am completed diploma in ece,and working in ht and lt lines.so is elligible diploma in ece for get electrical C Licence?plse give ur opinion?
1902if main CT is of ratio 50/5, and meter CT is -/5 what will be overall multiplying factor of meter.PT is 11000/110 .
BSNL,
1668what is difference between speed mode and torque mode in motor?? explain in simple words please.
1597If more than rated DC voltage appears across trip coil of the breaker, what will happen? e.g. in 110V DC circuit system, if voltage across battery terminal showing 121 V
1659How to calculate voltage drop in copper and aluminium cable? I have laid 240Sq.mm Aluminium cable for the length of 600 Mtrs in 1 Mtrs underground. Normal load is 150A. Transformer is 630KVA, 6.KV/433V. But, I am getting only 395 Volts when load. How to calculate voltage drop and what is the permissible voltge drop for this circuit?
1 272811kv/433v delta/star distribution transformer primary side full load Ht current is 83.33A in , but input side VCB rating 800A.why?
1667Post New Electrical Engineering Questions
dc supply given to dc generator winding.how is possible? my knowledge is saying the winding will burn. please reply.
What is the difference between amorphous core transformer and CRGO core transformer?.
Any one can explaination about calibration with rotating sub standards?
I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?
How phase displacement change in the over current relay coils.
How to calculate the sag of OPGW during stringing???
What is FTA card? How it works?
How to calculate total harmonic distortion level(THD) in VFD? and how can we reduce harmonics?
Define the overload capacity of the motor?
difference between semiconductor & conductor & insulator?
How the capacitance og capacitor volatage transformer is decided?
what is your aim
What happens when two positively charged material is placed together?
why different series of vfds (like allenbradley)are used in industry ?
what is the ms flat constant for calculating earth mat design calculation?