BALLAST CAPACITORS

BALLAST CAPACITORS

Light is a form of electromagnetic radiation. Lamps can be broadly classifies as follows:

  • INCANDESCENT LAMPS
  • ELECTRIC ARC LAMPS
  • GAS DISCHARGE LAMPS

An important characteristic of any discharge is that, once started, the current tends to increase instantaneously to a destructive value. A choke (referred to as ballast) is incorporated in the AC circuit to limit the current to a safe value.

Fluorescent and Discharge Lamps have a inherent low power factor of the order of 0.4 lag to 0.5 lag. Power factor is improved by the use of capacitor having capacitance value ranging from 3 MFD to 45 MFD and power factor is corrected to 0.85 lag to 0.90 lag which is acceptable for proper utilization of power. The capacitor provides a low impedance path to interference currents & helps to by pass any third harmonic currents.

MFD Value Voltage ContainerSize in mm
Plastic Aluminium
Dia Height Dia Height
3.15 440 28 x 55 28 x 52
28 x 55 28 x 52
4 250 30 x 55 30 x 52
30 x 55 30 x 52
8 250 35 x 73 35 x 68
38 x 73 38 x 68
10 250 45 x 73 45 x 67
45 x 95 45 x 97
15 250
20 250
33 250
42 250