OSRAM POWERTRONIC PT-FIT I ECG for HID lamps, with cable clamp - Manual (Page 32)

THE PRODUCT IN OPERATION
2.4.10. Protection against moisture in outdoor luminaires
PTo ECGs have been developed for outdoor luminaires
with a higher IP Class (IP Class 54 or higher spec lumi-
naires are suitable). The potted construction leaves them
better protected in the face of climatic effects (moisture,
condensation, etc.). For older lighting installations (lumi-
naires) or due to increased material fatigue of luminaire
components (seals, covers, etc.) an installation that pro-
tects from spray water or precipitation should be preferred.
2.5. Electromagnetic compatibility
The term EMC (electromagnetic compatibility) and the sti-
pulations relating to it stand for a whole range of different
test criteria.
The most important of these criteria that play a role in the
context of electronic control gears are regulated by the
standards described below in relation to radio interfe-
rence, harmonic content (up to the 39th harmonic) and
resistance to interference.
By displaying the CE marking OSRAM guarantees the
conformity of POWERTRONIC
® electronic control gear
with the interference resistance requirements and the
specifi ed limits for harmonic currents and for radio inter-
ference (as well as for safety). See also section 3.2
"Quality marks".
32
List of the most important standards for ECGs
IEC/CISPR International
Standards European standard EN
Harmonics IEC 61000-3-2 EN 61000-3-2
Resistance to interference IEC 61547 EN 61547
Radio interference CISPR 15 EN 55015
Electromagnetic fi elds IEC 62493 EN 62493
2.5.1. Specifi ed harmonic limits
Lighting installations are restricted in relation to mains
harmonics. They are classifi ed and are categorized in
Class C. Up to 25 W lighter requirements apply.
For lighting installations > 25 W the following limits are
specifi ed:
All POWERTRONIC ® ECGs (> 25 W) for use with HCI,
HQI and NAV lamps must have a total harmonic distortion
(THD) < 10 %.
Employing devices that do not conform to the specifi ed
harmonics limits may have serious consequences:
• Premature failure of capacitors
• Premature triggering of circuit breakers and other safety
equipment
• Failure or functional problems with computers, drivers,
lighting installations and other sensitive electric devices
• Overload of the neutral conductor (especially in the 3rd
harmonic)
• Explosion of discharge lamps
2.5.2. Resistance to interference, immunity
The devices conform to the requirements of IEC 61547 on
immunity. This means that they are protected against ex-
ternal infl uences of electromagnetic fi elds against static
electrical discharges (ESD), against short-term (transient)
surge voltage and voltage drops or failures in the mains
network.
Specifi ed harmonic limits
Harmonic number Proportion of fundamental mains current in % (50 Hz)
2 2
3 30 x power factor (λ)
5 10
7 7
9 5
11 < n < 39 3