Electrical Engineering Virtual Power Lab Experiments

Reactance Quadrature

Procedure

  1. Connect circuit as shown in Fig. (connection diagram). Set output to zero.
  2. Start DC motor and run slightly below synchronous speed.
  3. Switch on AC supply and increase variac output. Observe readings.
  4. Fine-tune motor speed to get maximum swings in meters.
  5. Note maximum and minimum voltage/current readings.
  6. Take multiple readings at different variac settings.
  7. Increase speed slightly above synchronous speed and repeat readings.

Connection Diagrams

Fig 2.1 Connection Diagram for Slip Test

Fig 2.1 Connection Diagram for Slip Test

Fig 2.2 Connection Diagram for Static Test

Fig 2.2 Connection Diagram for Static Test

Observation Table

S.No. Voltage (Max–Min) Current (Max–Min) Xd Xq Speed
1 . . . . .
2 . . . . .
3 . . . . .
... . . . . .
n . . . . .

Average Values

Average value of Xd = ________
Average value of Xq = ________