Instructions

6.52
Operating instructions
OSRAM therefore advises against dimming in CCG mode and in indoor lighting for lamps currently available.
The method of dimming has a strong influence on the results. It is advisable to reduce the lamp power with a
controllable square-wave ECG; dimming should not be achieved by reducing the voltage or by leading-edge
phase dimming. The product characteristics cannot be guaranteed for lamps that are operated at dimmed
settings.
The combination of POWERBALL
®
HCI
®
and POWERTRONIC
®
PTo offers energy-saving operation wherever
optimum color rendering is not essential for outdoor lighting.
PTo with square-wave operation and optimized ignition operates POWERBALL
®
HCI
®
lamps at optimum
performance down to 60% of rated lamp output. There are no significant adverse effects even if power is
reduced to 85% of rated output.
Operation between 85% and 60% of rated lamp output also has no impact on the failure rate. The lamps
increasingly exhibit a slight green tinge and may differ from one another in terms of their color (color spread).
Luminous flux decreases over the life of the lamp at a faster rate in dimming mode than at 100% output on
PTo. This effect can be reduced by mixed operation involving dimming mode and 100% mode.
NAV
®
and HQL
®
lamps can be operated at up to 50% lower wattage by changing the impedance, provided
ignition takes place at rated wattage.
Switch-on
HWL
®
: Instant full luminous flux. Starting current approx. 30% higher
HQL
®
: Full luminous flux after approx. 5 minutes. Starting current approx. 40% higher
HCI
®
: Full luminous flux after approx. 1 to 3 minutes. Starting current approx. 40% to 90% higher –
depending on lamp type and control gear
HQI
®
: Full luminous flux after approx. 2 to 4 minutes. Starting current approx. 40% to 90% higher –
depending on lamp type and control gear
NAV
®
: Full luminous flux after approx. 6 to 10 minutes depending on lamp type and control gear.
Starting current approx. 25% higher
SOX, SOX-E: Full luminous flux after approx. 12 to 15 minutes. Or longer at low ambient temperatures. No
higher starting current.
Restarting
HCI
®
, HQI
®
, NAV
®
, HQL
®
, HWL
®
:
These lamps need a little time (0.25 to 15 minutes) to cool down before they can be restarted because the
ignition voltage to begin with would be higher than the supply voltage or, in the case of HCI
®
, HQI
®
and NAV
®
,
above the ignition voltage of the igniter. Instant restarting is possible with suitable igniters for the following
lamps:
HQI
®
-TS EXCELLENCE
HQI
®
-TS (exception: HQI
®
-TS 2000W/N/L)
HCI
®
/HQI
®
-TM...HR (HR – Hot Restrike)
NAV
®
-TS
The necessary restrike voltage is 25 to 60 KVs.
SOX, SOX-E:
SOX 18 lamps can be instantly restarted. All other SOX lamps need a cooling time of a few minutes before
they can be restarted.
Radio interference
After ignition, radio interference does not normally occur with high pressure lamps. Should radio interference
occur with HQL
®
lamps it can be avoided by connecting a low induction capacitor of 0.1 µF parallel to the
lamp. Capacitors must not be connected parallel to any other high-pressure lamp. The requirements of DIN
EN 50160 must be met.