Twin Lamp Starting
The UM3 is for twin lamps, operating in series from one ballast and will start lamps in the twin configuration even at -30°C and with a supply voltage down to -10% (both conditions applying together). Them UM3 is also suitable for 4W to 22W single circuits on 115 to 240V supplies.
Conventional Canisters
Both the UM2 and UM3 are housed in conventional starter canisters. They have an operating life equal to that of a luminaire and can be retrofitted into existing installations of factory fitted into new luminaires.
Multipulse System
LEL's patented Multipulse circuit used in the UM type starters represents a significant advance in electronic starter performance.
Ordinary electronic starters provide for lamp striking with one high voltage pulse each half cycle of the supply frequency. LEL's Multipulse starters provide several high voltage pulses in each half cycle.
Under normal conditions a lamp will strike, after heating, on the first pulse received and further pulses are inhibited - so the Multipulse starter provides a positive soft start typical of a single pulse starter. The Multipulse advantage becomes evident under limit conditions of low ambient temperature and low supply voltage.
Where those apply the higher energy available from the Multipulse system is far more effective than a single pulse. With 2400mm Krypton lamps (100W) the higher energy Multipulse system is essential for reliable starting below +10°C, and for 1800mm slimline (70W) lamps the Multipulse starter has been shown to overcome problems encountered with ordinary electronic starters in outdoor situations.
With all lamps the low temperature and low supply voltage limits are greater than those applying to single pulse types. This also means that heating times can be optimised for normal rather than extreme conditions, thereby providing a faster start. |
