OSRAM POWERTRONIC PT-FIT I ECG for HID lamps, with cable clamp - Manual (Page 9)

2. The product in operation
THE PRODUCT IN OPERATION
2.1. Supply voltage
2.1.1. Permissible voltage range
All POWERTRONIC
® ECGs for the operation of high-pressure
discharge lamps are designed for sinusoidal alternat ing
voltages at 50 to 60 Hz in a nominal voltage range of
220–240 V. Deviations of -10 %/+6 % from each of the
nominal voltage boundary values are permissible – even
within such a range, thanks to the ECG, lamps will still
remain within the optimal working range set for the
relevant lamp type.
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2.1.2. Overvoltage > 264 V
During operation above the nominal voltage range
("overvoltage"), a distinction is made between two forms
of overvoltage which differ in terms of their duration:
Short-term surge voltages that are typically in the micro-
second range (fast transient or impulse voltages).
Such surge voltages may be caused by:
• Switching inductive loads (e.g. welding devices,
elevators, inverters, etc.) on or off
• Lightning strikes
POWERTRONIC
® ECGs are protected against short-term
mains voltage surges in accordance with EN/IEC 61547
Quasi-stationary overvoltage, which may last into the
minutes to hours range.
Such overvoltage may be caused by:
• Imbalances in mains loads (interruption of the neutral
conductor in three-phase networks plus additional
asymmetrical load balancing)
• Unstable supply networks
The strain caused by overvoltage will always exert a heavier
load on each individual component (part). This in turn
leads to heavier thermal loads and can thus have a
nega tive effect on the service life of the affected ECG.
POWERTRONIC ® ECGs are not suitable for operation
where loading is unbalanced. In extreme cases, overvoltage
can lead to the destruction of the affected ECG. There are,
however, exceptions from these remarks, such as the
PTi SNAP devices (you can obtain details on them in their
various technical datasheets) which exhibit a high level of
stability in load imbalances. Such devices can withstand
overvoltage of up to 300 V for 48 hours and of up to 320 V
for two hours. In the range from 275 < V < 320, these
ECGs shut down after 40 seconds in order to protect their
own circuits from destruction. With mains voltages of over
320 V they shut down immediately. Extended periods
with mains voltages > 320 V may lead to the destruction
of the device.
Nominal voltage range and behavior in case of
undervoltage or overvoltage
Nominal voltage range
AC voltage 220–240 V, 50/60 Hz
Permissible voltage range for continuous operation
AC voltage 198-264 V, 50/60 Hz
Behavior with undervoltage
Lamp operation with undervoltage 198–220 V → guaranteed lamp operation
Voltage drop during
operation 198 V ≥ U ≥ 176 V → lamp start
and operation usually possible,
but not guaranteed
U < 176 V → unspecifi ed range
→ continuous operation not possible
Behavior with overvoltage
Lamp operation with overvoltage U : 240–264 V → guaranteed lamp
operation
Voltage peak during
operation U > 264 V → continuous operation not
possible, ECG may be irreversibly dam-
aged within seconds, depending on the
height of the peak.
Short transients or impulse voltages
in accordance with EN/IEC 61547. POWERTRONIC ® ECGs are protected
Valid for: The POWERTRONIC ® ECG
Operation outside of the permissible nominal voltage range
can lead to the ECG being damaged. For this reason, the
layout of the relevant network and its permitted values and
tolerances should be considered when deploying elec tronic
control gear.