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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,
1751If 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.)
1968i 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?
1900if 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,
1666what is difference between speed mode and torque mode in motor?? explain in simple words please.
1596If 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 272611kv/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
What are the three major categories of error?
please forward me the type of questions which would rise while me attending to 33KV Electrical License to my mail ID:vadrevu_raghava@yahoo.co.in
why single CT used in DOL starter power circuit?
What is mean by Sensitive Earth fault & what are the effects
explain which quantities change in the starting and the and the running condition in induction motor
7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?
what is the purpose of slope in the differential relay?why we are using two slope?but in busbar differential we are using only one slope.why?
which IS or IEC is used for earthing,breakdown voltage of transformer oil, hv/pd testing and all type of electrical testing
Single line diagram for dbb (double bus bar)system.
I completed iti in2004 I was worked in A grade contractor can I get c licence
What are the uses of lead compensator?
who invented active elements? plz give me the complte details of active elements...
how the testing of protection CT Testing done through Primary injection kit please describe in detail procedure...
What are the types of power in electrical power?
How does a television work?
