Instructions

6.51
Operating instructions
Control gear
HWL
®
:
No control gear required; connect directly to power supply.
HCI
®
, HQI
®
, HQL
®
, NAV
®
:
• Control gear:
< 220 V high-reactance transformer
≥ 220 V choke
For HCI
®
, HQI
®
and NAV
®
lamps, control gear with suitable overload protection should be used (see Safety).
• Igniters: HCI
®
, HQI
®
and NAV
®
lamps also need an appropriate igniter.
Exceptions:
• HQI
®
-T 2000/N
• HQI
®
-T 2000/D/I
• NAV
®
-E 50/l 4Y
®
• NAV
®
-E 70/I 4Y
®
• NAV
®
-E 50/I
• NAV
®
-E 70/I
• NAV
®
-E 110
• NAV
®
-E 210
• NAV
®
-E 350
NAV
®
SUPER lamps require igniters with a higher ignition energy.
With suitable igniters or operating equipment HCI
®
, HQI
®
and NAV
®
lamps can be instantly restarted while
hot. For more information see Restarting.
SOX, SOX-E:
Operation with high-reactance transformers (except SOX 18 tapped choke and 5 F ignition capacitor) or
hybrid control gear.
For the distances between the lamp and the control gear, check the information provided by the equipment
manufacturer.
Start-up current
HCI
®
, HQI
®
, NAV
®
, HQL
®
:
Depending on the control gear used, the start-up current may be up to twice as high as the operating current.
Circuit protection
Fuses for HCI
®
, HQI
®
and NAV
®
lamps must be slow-acting. If fuse-wire is used it should be rated for twice
the rated lamp current. If MCBs are provided they should comply with characteristic “C”.
Holders
The holders used must be capable of withstanding the high voltages that occur during ignition and hot
restrikes. Suitable high-voltage holders can be ordered from lampholder manufacturers. A retainer is
recommended for outdoor applications to prevent them coming loose (IEC 60238).
Power factors
(without correction)
• HWL
®
: cos φ~1
• HCI
®
, HQI
®
and HQL
®
: cos φ 0.5 to 0.7
• NAV
®
: With chokes cos φ 0.5
• SOX, SOX-E: cos φ~0.3 (SOX 18: cos φ~0.9)
For the PFC capacitors required check the manufacturer‘s specifications. For examples see pages 6.43 to 6.49.
Power reduction
HQI
®
lamps must not be operated at reduced wattage as this may result in color shifts, poorer maintenance
and shorter lamp life. In principle, dimming of HCI
®
POWERBALL
®
lamps is technically feasible. The higher
thermal load capacity of the round ceramic burner offers better dimming behavior in terms of luminous
efficacy and color rendering compared to metal halide lamps with quartz burners or cylindrical ceramic
burners.
As before, however, dimming does lead to a change in the chromaticity coordinates. Lamps operated at
dimmed settings suffer a greater loss of luminous flux and a greater color shift over their lifetime. These effects
are unwanted particularly in indoor lighting. They are more pronounced in CGG mode than in ECG mode.