Answer Posted / r.panneer selvam
To obtaine the 3 phase 4 wire supply,the 3 windings of an
alternator is star connected and the same is earthed to
protect the alternator from short circuits as well as to
feed the neutral wire to the feeder distribution
| Is This Answer Correct ? | 15 Yes | 3 No |
Post New Answer View All Answers
Diagram and details of polarity test for Current Transformer 11kv 400/200/100/1A
We have Diesel generator of 200KW. fuel consumption is always same,even connected light load or full load. Is it right?
why starting current is high and resistance is almost 0 during the starting of motor dc motor...?
What is the loss of transformer of 220kv/11kv, 63/80 MVA and 18.05% impedance
In AC if the direction of current keeps reversing every half cycle, how does it propogate through the transmission lines?
what is the working principle of a DG Set, Alternator, & exiter
when measure the core loss of three phase distribution transformer or three phase reactor loss, one phase shown negative watt loss. why??
what is meant by the phrase 'static load' in case of shorting in a generator excitation system?
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.
how we explain parallel paths armature winding?
What about electrical Units. discrive in detail
What is the two pole structure?
what will be d.g. capacity to cater together for 14hp A.C. load & 3kw lighting load
I am having a 1500 KVA transformer whose secondary current is 2086A and my connected load is 1000 KVA, I am having 400 KVAR APFCR for PF improvement what ratio of CT should i install in LT EB Bus to get optimum PF improvement?
For RCD (Residual current device) Icu is defined. How i can find Ics for them?
