The power input to a three-phase motor is measured by the two wattmeter method. The three line voltages are 220 V and the current in each of the three line wires is 8 A. If the three-phase power factor is 0.866 lag, what are the values of power indicated by wattmeter 1 and  wattmeter 2?

Q: What would be the same results of this quesiton if the circuit was single phase 1000v?

A: If True power is single phase i.e.,P1ϕ=10kWV1ϕ=1000VI1ϕ=12.33 A

Q: In a 500/250 V d.c. 3-wire system, there is a current of 2000 A on the +ve side, 1600A on the…

A: What is three wire DC system? A three-wire DC system has two outer wires and a neutral, or middle,…

Q: A tree-phase generator has a load 100 kw per phase at a power factor 80 percent,lagging what is the…

A: The active power consumed by a 3ϕ load is equal to the sum of active power consumed by each load.…

Q: Q3) A 1600-kVA, 13500 V, 50-Hz, Y-connected synchronous generator has Ra=1.5 Ohm, Xs = 30 Ohm.…

A:

Q: If it is desired to bring alternating current out of a generator, what kind of a "take-off" system…

A: If the alternating current is required from the generator a copper or brass rings are connected at…

Q: The current in a single-phase motor lags 50° behind the voltage. What is the power factor of the…

A: Power factor pf = cosin of angle between voltage and current.

Q: Solve the circuit in Figure 14 using the resistance and reactance values in Table 1 for the total…

A:

Q: 11. You are in the field watching a 3 Phase AC generator operate. The generator is operating at 10…

A: The general complex power equation for three phase system is  VA = sqrt(3). VL IL IL = VA/{1.732 ×…

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.