Experiment - 5

OBJECTIVE


To Study the effect of different shape of electrodes on dielectric (air) breakdown.


EQUIPMENTS REQUIRED


    1. High Voltage Transformer

    2. HV Control Desk

    3. Flat Electrode

    4. Disk Electrode

    5. Pointed Electrode

BLOCK DIAGRAM

Fig.5.1 Block Diagram of HV Setup


PROCEDURAL STEPS

  1. Place the High Voltage transformer unit about 7 feet away from the control unit.
  2. The control unit is connected to supply voltage taking care that the earth connections are effective.
  3. The multiple point control switch is set at its lowest tapping.
  4. The push button on control unit is pressed firmly for at least 5 seconds. Note that no Breakdown to occurs, in which case button should be released at once without delay. Break down is indicated by a continuous discharge across the gap and meter indicating a sudden voltage drop.