OSRAM POWERTRONIC PT-FIT I ECG for HID lamps, with cable clamp - Manual (Page 11)

THE PRODUCT IN OPERATION
2.1.7. Overvoltage protection
In conventional three-phase installations, electronic
control gears are generally suited to an input voltage of
between 220 and 240 V.
Depending on the load balance, this value may rise in case
of the missing or unsatisfactory contact of the neutral
conductor to a maximum value of √3 x 230 V = 400 V:
POWERTRONIC ® ECGs are not suitable for operation
where loading is unbalanced. In extreme cases, over-
voltage 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 these
in their various technical datasheets) which exhibit good
surge protection capability (see also chapter 2.1.2).
2.2. Installation
2.2.1. ECG operation for luminaires with protection
Class I and II
Luminaires are classifi ed according to the level of pro-
tection against electric shock according to EN 60598-1.
Protection Class I
For luminaires under Protection Class I, all touchable
conducting parts that might become "live" in the event of
a failure must be properly connected with the protective
earth.
POWERTRONIC ® ECGs are generally suitable for use in
PC I luminaires. To conform to the specifi cation you must
make a correct connection of the PE terminal to the ECG
via the PE connection.
Protection Class II
For Protection Class II luminaires, protection against electric
shock does not depend only on basic insulation, but also
on additional precautions such as additional insulation or
improvements to existing insulation. Protection Class II
luminaires therefore have no protective earth (PE) connection.
POWERTRONIC ® ECGs have been certifi ed in accordance
with safety standards EN 61347-1 (General safety require-
ments) and EN 61347-2-12 (Particular requirements) as
PC I ECG (carrying the protective earth symbol). In addi-
tion, EMC approval is also granted at PC I level for ECGs.
However, under certain conditions, these ECGs can also
be used in PC II luminaires (without any PE connection).
The following preconditions must be fulfi lled in such cases:
• Only L and N terminals are available as electrical con-
nection terminals for the luminaire. There is no PE
connection for the luminaire.
=> No protective earth is connected either to the lumi-
naire or the ECG.
• The ECG is installed in such a way that either the PE
ECG terminal (marked with the Protective Earth symbol)
or the ECG is not visible and thus cannot be connected
with PE accidentally.
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• The requirements in relation to additional or improved
insulation, creep distances and clearances are fulfi lled
for ECGs with cable clamp or ensured using other ap-
propriate precautions (adding separations, increasing
distances, etc.) when installing the ECG in the luminaire.
• The EMC requirements are also fulfi lled without connec-
ting the PE or ensured by taking appropriate precautions
(using ferrites, etc.).
2.2.2. Insulation
2.2.2.1. Insulation distances in luminaires
When constructing luminaires, the EN 60598-1/IEC 60598-1
standard is decisive in relation to the topic of electrical
safety (especially in terms of contact safety).
In order to ensure the electrical safety of a luminaire creep
distances and clearances between electrical connections
must be considered. These terms are described in
EN 60598-1 Section 11 for the supply terminal of the lumi-
naire.
"Creep distances at a supply terminal shall be measured
from the live part in the terminal to any accessible metal
parts". The clearance shall be measured between inco-
ming supply wiring and accessible metal parts, i.e. from a
bare conductor of the largest section to the metal parts
which can be accessible. At the internal wiring side of the
terminal the clearance shall be measured between live
parts of the terminal and accessible metal parts."
Further information on this topic is available in the
EN 60598-1 luminaire standard.
2.2.2.2. Insulation testing in luminaires
Luminaires must be subjected to an insulation and high-
voltage test (according to EN 60598-1). This test should
be carried out as follows:
• The supply terminal and all lamp cabling for the lumi-
naire – except the protective earth terminal – should
be connected together conductively.
• Apply a test voltage between the connected mains and
lamp cable and the earthed metal parts.
− Test insulation with 500 V DC min. 2 MΩ (corresponding
to a max, 0.25 mA leakage current) will be necessary.
− High-voltage test with 1.5 kV, AC/50 Hz: 1 sec without
fl ashover (e.g. leakage current < 10 mA)
Permissible alternatives in luminaire manufacture are
(PM 333, PM 395)
• 100 % high-voltage test (insulation testing may be
dispensed with) or
• 100 % insulation test and 1–2 % high-voltage test or
• Alternative testing in consultation with the test center
(e.g. VDE)