IEC 61547:2009/ISH1:2013

TC 34/Publication 61547 (2009), Second edition/I-SH 01

EQUIPMENT FOR GENERAL LIGHTING PURPOSES –

EMC IMMUNITY REQUIREMENTS
INTERPRETATION SHEET 1
This interpretation sheet has been prepared by IEC technical committee 34: Lamps and
related equipment.
The text of this interpretation sheet is based on the following documents:
ISH Report on voting
34/180/ISH 34/185/RVD
Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.
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The draft is based on the outcome of documents 34/155/DC and 34/158/INF.
Introduction:
Test conditions of dimmable lighting equipment are unclear in IEC 61547 for dimmable
lighting equipment with dim level other than 50 % ± 10 %. Some HID control units have only
one dim level, for example 65 %.
Present text, Clause 7, second paragraph, first sentence:
“Equipment including a regulating control shall be tested at a light output level of 50 %
± 10 %.”
Interpretation for equipment which could not fulfill the test dim level conditions:
If a light output level of 50 % ± 10 % is not available for equipment including regulating
control, the test shall be done at the level which is closest to 50 %. If two steps equally distant
to 50 % are available, the lower level (< 50 %) shall be used for the test.

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June 2013 ICS 29.020; 29.140; 33.100.10 French text overleaf

CE 34/Publication 61547 (2009), Deuxième édition/I-SH 01

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