These capacitors are used in light fittings like Sodium-Vapor Lamps, Mercury-Vapour Lamps, Fluorescent Lamps, Discharge Lamps etc.
DIMENSIONS:
MFD Value |
Voltage |
Container
Size in mm
|
Plastic |
aluminum |
|
|
3.15 |
440 |
28/30 |
x |
55 |
28 |
x |
55 |
30 |
x |
55 |
30 |
x |
55 |
35/38 |
x |
73 |
38 |
x |
73 |
45 |
x |
73 |
45 |
x |
95 |
|
28 |
x |
52 |
28 |
x |
52 |
30 |
x |
52 |
30 |
x |
52 |
35 |
x |
68 |
38 |
x |
68 |
45 |
x |
67 |
45 |
x |
97 |
|
4 |
250 |
8 |
250 |
10 |
250 |
15 |
250 |
20 |
250 |
33 |
250 |
42 |
250 |
Light is a form of electromagnetic radiation. Lamps can be broadly classified 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. |
