In most cases, arc lamps require a trigger pulse to cause the initial ionisation of the gas. This pulse is usually in the order of 20 – 30 kV with a pulse width of a few microseconds.
In the case of pulse lamps without a simmer supply, the lamp needs to be triggered for every pulse. Simmered pulse lamps and CW lamps are only triggered when the lamp is switched on.
Heraeus Noblelight offers quality transformers for external triggering of lamps. Individual data sheets are available on request.
Further information:
Datasheet External Trigger Tranformers (PDF)
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