Group,
trying to get to the bottom of the statement some of you saw many times over.
Test is a power line surge, section 4.2.4 of TIA-968-A. This is a quote:
"Failure Modes resulting from application of power line surge. Approved terminal
equipment and approved protective circuitry shall comply with all the criteria
in this
standard, both prior to and after the application of the power line surge
specified in
4.2.4, notwithstanding that this surge may result in partial or total
destruction of the
equipment under test"
The use of the word "notwithstanding" is quite common throughout this standard.
Been somewhat late English language acquirer, I looked it up in Merriam-Webster
and easiest one for me was "in spite of".
There are many different types of surge test pass/failure criteria's throughout
61000-4, GR1089 and others, from no traffic errors during the surge to it is ok
if it falls apart, as long as it does not catch on fire and does not kill
anyone.
But these requirements are clearly defined in each standard.
My question for TIA-968-A is: how can something be compliant with all the
criteria in this standard "in spite of" been totally destructed? Does it mean
it is ok if power adapter or power supply is dead or entire product, including
voice port can be out?
Test Lab did the 2.5kV test, power adapter stopped producing DC, but no arcing,
burning or enclosure breach. Lab concluded the failure.
I am probably missing something very obvious, so please be gentle.
Thank you,
Mark
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