Interested to Buy Any Domain ? << Click Here >> for more details...
can u tell the difference between star-star transformer and
delta to delta transformer.
- 3 Answers
- 5945 Views
- Videocon, I also Faced
- E-Mail Answers
Answer Posted / karthik
In a star star tfr have neutral with both primary and
secondary side.But in case of a delta delta tfr does not
have a neutral.
| Is This Answer Correct ? | 8 Yes | 1 No |
Post New Answer View All Answers
Type of motor stater detail and working detail
what exactly commisioning work does in electrical site work... LT side?..
Explain mechanical rotational system?
Explain the process of commutation in a dc machine.
why we use single core 630mm2 cable for transformer secondary side
What would be the size of wire used for 2 Ton of window A.C?
what topics we have to concentrate for power grid et.written test.and tell what to read for english synonyms and antonyms.
Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.
Write down the design procedure of commutaj.
why occ characteristics of generator is also called as magnatization characteristics ?
What is method of calculating the fault current for a MDB, 50KW, 3PH, 415V, 50HZ?
what is ground fault in ACB?
If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?
State thevenin’s theorem?
1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.
