Answer Posted / vijay balu raskar
AC able to generate varying flux because of variation property.
DC unable to generate flux because of constant property.
generated Flux have to travel from primary core to secondary core which is not possible in the DC mode.
Due to this reason, DC are not used in the transformer.
But, if we use it then transformer will burn as per rating of DC voltage.
Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
what is the advantages og idmt relay over magnetic relay??
What is the diffrence (Technical & Construction ) between CBCT & Normal CT?
how the synchronizing is obtained at bus couplers in grid substation? (because there we cannot change the frequency in one of transmission lines like in generator synchronization)
If SFU is Switch Fuse Unit, What is the expansion for FSHF in Electrical Engineering?
why are the maintaine power factor and how can this control and this is how work.
Sir, plz tell me how droop setting is done in parellel operation od DG set ? please give practical example ?
in indoor type circuit breakers why only the corner breaker trips specially during cold season. What is the reason.
what is the effect of power factor of machines in starting current
Why use the vcb at high transmission system ? Why can’t use acb?
Is it possible to measure the voltage of a battery from a single terminal?
What is the formula to calculate the size of Aluminium and copper cable?
How is magnetic leakage reduced?
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 to copy from plc ge fanuc versamax series,all input and output, adress, and printout.
how does WTI work ?