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134 Ignitors and Ballasts
TECHNICAL
HID Ignitors and Ballasts
The starting voltage for most High-Intensity
Discharge (HID) lamps, especially metal halide
and high-pressure sodium types, is higher
than the mains voltage.
Ignitors provide the necessary high voltage to
start such lamps.
The high-voltage pulse varies from 1 to 5kV
depending upon the type of the lamp and is
inhibited when the lamp starts.
Hella ignitors are manufactured in
accordance with IEC 60926 and IEC 60927,
the International Standards specifying
performance, general and safety requirements
for starting devices.
Old high-pressure sodium and metal
halide lamps with conventional ignitor
technology often cause visual discomfort and
electromagnetic interference at the end of the
lamp life when the ignitor would repeatedly
strike the lamp, and it would not stabilize
electrically.
This cycling can be a significant irritant and
become a safety risk.
The solution: ‘PulseControl’ from Hella, the
first digital ignitor in the world.
Greater reliability, greater ignition power,
reduced re-strike time and minimum
interference through digital, precise
management of all lamp types without
annoying flashing.
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Precise lamp management
through digital technology
The patented switching circuit digitally
controls the ignition and automatic tripping
logic functions. PulseControl does not
consider the time of the re-strike period but
the number of attempts made. Because of
this, all lamps are switched off after 3 cycles
regardless of luminaire or lamp type.
Re-strike time reduced by
up to 50%
Depending on the lamp wattage, 4–10 ignition
pulses per half wave will be generated.
As a result of the increased ignition power
and the pulse/break cycle, the re-strike time is
reduced by up to 50%.
Interference reduced by
up to 90%
This 90% reduction in interference time (only
about 30 sec instead of 300 sec), is due to the
reduced re-strike period and the pulse/break
cycle which strikes for 5 seconds then pauses
for 25 seconds.
Ignitor Temperature Rise
Because ignitors have heat-sensitive
elements, their suitability for particular
applications is determined by the rise in the
element’s temperature. When mounting an
ignitor in the luminaire on a control equipment
enclosure, the ambient temperature range of
the application must be considered.
Quality components in Hella ignitors ensure
that they can withstand temperatures from
–30°C to +100°C with a minimum power loss.
Long life
Lighting control electronic equipment is
designed to run continuously for a minimum of
80,000 hours when operating at its maximum
temperature. This high level of reliability
can be achieved only by using high-quality
insulation and heat-resistant components.
Very low temperature rise in Hella ignitors
makes them highly reliable components for
use in all lighting control equipment.