Important Features of electronic ballast
MELCON Active Power Factor Corrected (APFC) ballasts are with all the following features and provide constant light output from the lamp from 145 ~ 265Vac. This enhances the lamp life.
Switching any electronic ballast generates a momentarily high input current surge, which is called inrush current, high inrush current can cause problemswith certain types of switch gear. ballasts suppress and streamline the current.
EMI/RFI Electromagnetic Interference:
Electrical noise generated by electronic equipment, which can interfere with the operation of other equipment such as radios, networking systems, sensitive equipment’s etc. MELCON ballasts are EMI/RFI filtered.
Input High Voltage Protection:
Protection against input voltage > 280 vac
Ratio of the actual power (watts) drawn by the ballast to the apparent power(input voltage multiplied by input current) delivered to the ballast. Power factor closest to 1.0 is the best. MELCON APFC ballasts have power factor of >0.98.
Lamp Starting System:
Preheat Start / Programmed Start: Relatively low starting voltage is applied while the cathodes are heated. At the optimum cathodes temperature, the starting voltage is increased instantly. This results in superior lamp life
High starting voltage with no cathode heating. This sometimes degrade the cathodes of the lamp resulting in shortened lamp life. Suitable for applications with low number of starts. Less than five starts a day. MELCON ballasts are with both the above systems.
End of the Lamp's Life Protection:
Electrical action & chemical inside the lamp degrade the cathodes after the lamp ages. This may cause excessive heating of the lamp, which in turn can break glass of the lamp. Hence for T5 & smaller diameter lamps, it is recommended to use electronic ballasts which protect the lamp as it approaches end of life
Lamp Current Crest Factor:
The ratio of the peak lamp current of the RMS (average) lamp current. Crest factor greater than 1.7 degrade lamp life. It has to be in between 1.4 & 1.7, as in all MELCON ballasts.
Light output compared to a reference ballast operating the same lamp.
CELMA, the Federation of National Manufacturers Associations for Luminaires and electro technical components for luminaires has introduced the parameter of Energy Efficiency Index which serves as a basis for an objective evaluation of the efficiency of a ballast lamp- system. The EEI measurements are based on European Norms EN50 294 “ Measurement method of total input power, Lamp, ballast and circuit.
Classification of ballast-lamp circuits for Energy Efficiency in Lighting:
.X European Norms (EN):
EN 55015 --- Radio/ Electromagnetic interference
EN 61000 Part 2 - 3 --- Harmonic distortion
EN 61547 --- Immunity
EN 60928 --- General and Safety requirements
EN 60929 --- Performance requirements
MELCON electronic control gear units are designed developed and manufactured in accordance with the stringent quality control system of DIN ISO 9001 MELCON electronic control gear can detect when a flourescent is reaching the end of its normal operation and deactivate the lamp. Thus abnormal phenomena, which can occur with conventional ballasts are prevented.
With MELCON electronic control gear in use time consuming mains switching is no longer necessary as replaced lamps are automatically re-ignited.