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Technical Details –

Technical Details – Components for Discharge Lamps Lampholders for High-pressure Discharge Lamps Metal halide and high-pressure sodium lamps feature extremely different bases, which include RX7s, Fc2, G8.5, GX8.5, GU8.5, GX10, G12, GX12, PG12, PGJ5, GU6.5, E27 and E40, depending on whether the lamp is single- or double-ended. All lampholders are subject to the same typical conditions found with discharge lamps: high ignition voltages and temperatures. The high start-up currents deserve particular attention in lampholder design. This is also reflected by the insulation materials, which are usually solid ceramics or heat-resistant plastic (e.g. PPS – polyphenylene sulphide). Depending on the lamp's requirements (voltage, current, temperature, etc.), silver, nickel and copper alloys with thick nickel coatings are used as conductors. The luminaire regulation EN 60598-1 (VDE 0711 part 1), defines the safety requirements with regard to ignition voltages in connection with creepage and air clearance distances. Special care must be taken to ensure that lampholders are approved for discharge lamps when using high-pressure lamps with E27 and E40 Edison bases. Lampholders that are suitable for this purpose are marked with a maximum value of "5 kV" and comply with the increased creepage and air clearance distances specified by the lampholder requirements in EN 60238 (VDE 0616 part 1). The lampholder regulations governing special lampholders, EN 60838-1 (VDE 0616 part 5), apply analogously to all other base systems. The high ignition voltage pulses also place special demands on the conductors. In practice, silicone-insulated conductors with an outer diameter of 3.6 mm have proved to be suitable for discharge lamps. Silicone-insulated conductors with a glass-silk lining with a diameter of 7 mm should be used for lamps with an instant hot restart (20 kV) function. VS lampholders for the UL market and UL approved leads are available for all common lamp types. Further information can be found at www.unvlt.com. When connecting lampholders to push-in terminals of ballasts, the diameter of the conductor and the length of the stripped cables must be taken into account to ensure correct operation of the installed components. To this end, Vossloh-Schwabe can make additional versions available with compacted cable ends as further options. When using compacted cable ends, the reduction of the cable diameter at the end of the cable must be taken into account, which means that the respective ballast push-in terminal has to be capable of taking the next-smaller cable diameter (see table with examples). When using screw terminals to connect a ballast, it is recommended to use a ferrules on the bare end of core. Cable cross-section Push-in terminal range on the ballast when using compacted cable ends mm² mm² 0.75 0.5 1 0.75 Bases for the most commonly used HI and HS lamps 96

Technical Details – Components for Discharge Lamps Bases for the most commonly used HM lamps Edison bases are predominantly used for mercury vapour lamps (HM) 1 2 Ignitors Ignition voltages for high-pressure sodium lamps (HS) and metal halide lamps (HI) The ignition voltage of HS and HI lamps is determined by the respective lamp technology as well as the creepage and air clearance distances of the base-lampholder system. High-pressure sodium lamps of 35, 50 and 70 W with an E27 base are ignited with a voltage of between 1.8 and 2.3 kV. All other high-pressure lamps of the sodium and metal halide families require an ignition voltage of between 4 and 5 kV (except for special lamps and lamps with base PGJ5). Superimposed ignitors Superimposed ignitors work independently of ballasts and generate defined ignition pulses within the voltage ranges of 220–240 V ±10% and 380–415 V ±10%. As the mains frequency only plays a minor role, these systems work equally well at 50 Hz and 60 Hz. In accordance with the lamp manufacturer's specifications, pulses or clusters of pulses of defined width and height are generated in every half wave. Although lamp current flows through superimposed ignitors, they only cause low losses in relation to the system's power consumption. The maximum ambient temperature can be calculated by subtracting the ignitor's self-heating, which is caused by the inherent losses, from the specified maximum casing temperature (tc). Superimposed ignitors should be mounted near the lampholder. The clearance needed between the ignitor and the lamp is determined by the respective maximum load capacitance, which is specified for each ignitor in the technical specifications. The capacitive load of the cable is dependent on its physical properties and wiring layout; this value usually ranges between 70 pF and 100 pF per metre. The casing temperature must not fall below –30 °C and must not exceed the maximum value specified on the device. Pulse ignitors Pulse ignitors use the winding of an inductive ballast to generate the pulse voltage needed to ignite high-pressure discharge lamps. For that reason, ballasts must be designed to withstand these high ignition voltages. In this respect, special attention is paid to the insulation as well as the creepage and air clearance distances. As pulse ignition systems generate high-energy pulses, they are also suitable in the event of longer conductor distances between ignitor and lamp. State-of-the-art ignitors feature electronic circuitry. Depending on their design and the technical requirements, the simplest solution is to connect pulse ignitors in parallel with the lamp. Further models make partial use of the winding of a ballast, which will either feature multiple tapping points for voltage selection or special tapping points for pulse operation. Circuit principle of a superimposed ignitor Circuit principle of a pulse ignitor 3 4 5 6 7 8 9 10 97

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    2 Ballasts for Discharge Lamps For

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    2 Ignitors and Accessories for Disc

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    Ignitors and Accessories for Discha

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    6 Emergency Lighting Modules for TC

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    Components for the UL Market GX10 L

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    General Technical Details Product d

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    Glossary A A type, B type capacitor

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    Subsidiaries Subsidiaries Adress Ph