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in star connected 4wired transmission system ,what happen if the neutral is grounded . or not grounded. which is significant and y
2 4580What is highest size of HT motor like 11 kv or 33 kv,and how to make it 750 rpm.i think the size will be very big.any idea ? pl. reply..
ABB,
1931Is it required to lay 2 runs of GI wires along with armoured cables from one power DB to another Power DB?
1941Is it required to lay GI wires along with GI/MS conduits from one point to another point though separate earthing cable is conncted from DB to Socket?
1998Is it required to lay 2 runs of GI wires along with armoured cables from one power DB Machines of higher rating?
2030What are the disadvantages if neutral current exists in grounded star transformer distribution system?
1 5568What will be advantage if we put some load in neutral of grounded star transformer & loadshortcircuit current,rated current of cable & MCB with example?
1847What will be the size of cable required for 5.5 KW motor ( Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.
2 26537What is the difference between shortcircuit current, rated current of cable & MCB with example? What will be the size of cable required for 5.5 KW motor (Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.
2044What is the difference between LT CT & HT CT?Can we use indoor type transformer as an outdoor type or vice versa?
Bhel,
2 11300Post New Electrical Engineering Questions
Is there any standard guidelines/Criteria to design NGR/NGT.?
A cotter joint is generally used to transmit
hi friends this is a newcomer in your community of enthusiastic peoples. i am preparing for SSC (CPWD JUNIOE ENGG EXAM FOR ELECTRICAL) pls guide me on the same how to crack it? PLS LET ME KNOW IS ANYONE THERE WHO PASED IT? CAN I GET THE QUESTION PAPERS OF PREVIOUS EXAMINATIONS?
i want some interview related questions with their answers which can help for attend the interviews...
How much current will a 5 HP delta connected motor at no load will take?Is tat need a starter
Advantages of using generator circuit breaker (GCB) scheme in a power station ?
Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1. H1-H2 = H2-H3 H3-H1 2. H2-H3 = H3-H1 H1-H2 3. H3-H1 = H1-H2 H2-H3 For the LV side also: 4. X1-X0 = X2-X0 X3-X0 5. X2-X0 = X3-X0 X1-X0 6. X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0 H2-H0 H3-H0 X0-X1 X0-X2 X0-X3 128.0 119.9 7.2 29.2 13.3 15.8 70.7 128.4 59.2 23.4 22.0 3.6 7.2 120.1 128.1 13.4 29.3 15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?
What are the three major categories of error?
Maintenance of transformer???
What is meant by load angle of an alternator? Upon what factors does the load angle depend?
what is the formula for calculating the phase clerance between two phases and phase to earth how to calculate the cable for a motor
defination of controlled shunt reactor
What are the common sources of energy?
In how we connect watt meter for open & short circuit test of a single phase transformer.
how can calculate 1kva generator running time in 1 liter keroscene
