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Lighting Capacitors

category: Capacitors, Lighting, Lighting Capacitors

Power factor correction lighting capacitors are types of capacitors used in the circuit of fluorescent, discharge, low pressure or high pressure gas lamps that are produced according to national standards of Iran ISIRI 12567, ISIRI 12568 and International standards IEC 61048 & IEC 61049 in Rahshad Electric Company.

The dielectric of these capacitors is composed of polypropylene film (BOPP) in micron thicknesses and the capacitor plate which is made of a very thin metal coating (less than 0.3µm). In the vacuum environment, the alloy metal vapor is deposited on a polypropylene film and capacitor plates are formed.

One of the biggest advantages of this technology is the dielectric self-healing feature of the capacitor, this means that, in case of insulation failure in the dielectric film, by producing local heat and evaporating of the metal layer in the area of ​​insulation failure, the short circuit is removed and insulation failure is repaired.

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Self-healing occurs in less than 0.01 second and according to the area of capacitor plate and the surface of the evaporated part; there is no significant reduction in capacitance. These capacitors are considered for use in the circuit of discharge lamps at a frequency of 50HZ or 60HZ and an altitude of 3000 meters above sea level.

Advantages of Self-Healing Capacitors:

  1. Low dissipation (Max is 20×10-4 tg δ)
  2. No permanent short circuit due to self-healing phenomena
  3. No leakage and environmental pollution due to the dry type of capacitor and filling resin
  4. Lighter and smaller than other capacitors
  5. Less expensive than other capacitors

Application:

To ignite the gas discharge lamps, including mercury vapor, sodium vapor, halogen, fluorescent lamps and similar types, a choke or transformer is needed.

The inductive effect of the choke or transformer leads to a phase delay in the light bulb which increases the current and decreases the power factor (COS ϕ) to 0.5. The power factor is corrected to at least 0.9 by adding a suitable capacitor to the circuit.

Compensation of power factor correction in parallel is used more than other methods. In this case:

  • Installation of capacitor is easier
  • Self-healing (SH) property increases reliability.
  • Losses in the compensation circuit are minimum.
  • If the capacitor is disconnected, the circuit will continue to operate.

 

Technical Specifications
Nominal Voltage 250 VAC (Other On Request)
Nominal Frequency 50-60 Hz
Capacitance Tolerance ± 10% (Other On Request)
Operating Temperature -25 °C/+85°C
Dissipation Factor Less than 20×10-4 at 50 Hz
Test Voltage Terminal to Terminal 2 Un for 2 Seconds
Max. Permissible Over Voltage 1.1 Un
Max. Permissible Over Current 1.3 In (In is Nominal current)
Casing Flame Retardant Materials
Output Terminal Wire, Cable, Plug, Cap

 

 

Flat Capacitor Round Capacitor
250VAC 250VAC
Weight per pcs (gr)  Qty per Box Dimensions

D * H (mm)

 Capacitance

fµ

 Rank Weight per pcs (gr)   Qty per Box Dimensions

D * H (mm)

 Capacitance

fµ

 Rank
18 500 38x14x28 1 1 33 288 25×60 1 1
18 500 38x14x28 2 2 33 288 25×60 2 2
18 500 38x14x28 2.5 3 33 288 25×60 2.5 3
18 500 38x14x28 3 4 33 288 25×60 3 4
19 500 38x14x28 3.5 5 33 288 25×60 3.5 5
22 400 38x18x28 4 6 33 288 25×60 4 6
22 400 38x18x28 4.5 7 33 288 25×60 4.5 7
23 400 38x18x28 5 8 32 288 30×60 5 8
31 400 38x21x35 6 9 32 288 30×60 6 9
32 400 38x21x35 7 10 44 288 30×60 7 10
34 400 38x22x35 8 11 46 288 30×60 8 11
34 400 38x22x35 9 12 47 288 30×60 9 12
34 400 38x22x35 10 13 48 288 32×60 10 13
          53 288 32×60 12 14
          52 288 32×60 12.5 15
          73 180 40×60 13.5 16
          76 180 40×60 14 17
          76 180 40×60 15 18
          75 180 40×60 16 19
          74 180 40×60 17.5 20
          74 180 40×60 18 21
          74 180 40×60 20 22
          101 80 40×85 24 23
          101 80 40×85 25 24
          103 80 40×85 26 25
          102 80 40×85 30 26
          100 80 40×85 32 27
          105 80 40×85 35 28
          105 80 45×90 40 29
          130 80 45×90 45 30
          131 80 45×90 50 31
          159 80 45×100 55 32
          156 80 45×100 60 33
          156 80 45×100 65 34
          195 80 50×100 70 35
          194 80 50×100 75 36
          202 80 50×100 80 37
          203 60 45×137 85 38
          205 60 45×137 90 39
          206 60 45×137 95 40
          207 60 50×100 100 41

 

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