Osram 421544 Datasheet download pdf (Page 4)

Guide to Starters Page 4 of 17

2 Introduction

The function of starters is to preheat the electrodes of fluorescent lamps and generate an ignition pulse.

While the lamps are in operation the starters should consume little or no power and be ready to operate

again as soon as the fluorescent lamps have been switched off.

A high-quality starter will last at least 40,000 on/off switching operations (such as OSRAM ST 111

LONGLIFE).

The DEOS

SAFETY Starter also reliably switches off the fluorescent lamps at the end of their lives.

3 Definitions (important technical parameters of a starter)

3.1 Partial discharge inception voltage or ignition voltage

This is the voltage at which partial discharge begins and the two bimetallic electrodes exhibit a clear glowing

aura.

The current flowing at this point is not sufficient to close the bimetallic contacts.

3.2 Closure voltage

This is the value of the voltage at which the bimetallic contacts close.

The closure voltage indicates the line voltage up to which the starter can be used.

3.3 Non-reclosure voltage

This indicates the threshold voltage below which the bimetallic contacts can no longer close. The non-

reclosure voltage is less than the closure voltage.

3.4 Pulse or surge voltage

The voltage that is generated in combination with the choke for igniting the lamp is known as the pulse or

surge voltage.

1 2 3 4 5 6 7 8 9 ... 16 17

No comments

Osram 421544 Datasheet Page 4