In message <ce9aaf4d.1cd81%scott...@gmail.com>, dated Sat, 2 Nov 2013,
Scott Xe <scott...@gmail.com> writes:
In dielectric strength test, normally the high voltage is required to
apply between live mains input and accessible parts. What are the
exact meaning of accessible parts? In general, we use test fingers
and/or test pins to determine an accessible parts.
Correct.
Is there any other requirement to determine it such as operating
temperature?
Not exactly 'determine'. Some standards require parts above a specified
temperature (or temperature rise) to be inaccessible.
Recently we notice there are dielectric strength tests for LED lamps
and compact FL lamps but no dielectric strength tests required for
halogen lamps. Actually they all have glass bulb and all are operating
on 230 Vac. Isn?t glass bulb considered as an accessible parts on
halogen lamp due to high operating temperature?
A dielectric strength test is probably not required because any halogen
lamp that is not broken would pass it. With an intact lamp, there are
two layers of insulation - the glass and the vacuum.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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