Pete Perkins said:
"Historically, the HV impulse tests applied are safety tests."
Safety-wise, HV tests of safeguard insulations are to determine that the
safeguard insulations will withstand the normally-occurring transient
voltages that occur on the mains circuits. I wouldn't call the
Further to Scott’s post, the required illumination is at 20V/m at the EUT,
rather than the more commonly used 10 V/m (I don’t know the 60335-1
requirement). As Scott mentions, the intent in this case is to make certain the
inverter remains functional, less so that it remain in a safe condition d
One common cause of nuisance tripping is EMI line filters whose input
capacitance to ground biases GFCIs near the tripping point. I would never power
up a computer on a GFCI circuit, asking for trouble. No high voltage pulses
needed.
Doug Smith Sent from my iPhone IPhone: 408-858-4528 Office: 7
Hi James,
The UL safety standard for PV inverters, UL 1741, makes normative reference
to IEEE 1547 and IEEE 1547.1 in Section 46. IEEE 1547.1, in clause 5.5 on
interconnection integrity, makes normative reference to IEEE C37.90.2,
which has test requirements for withstand capability to radiated
el
James,
The interoperability of equipment continues to get more
complicated as switching technology spreads more ubiquitously. It is well
known that electronic protection devices (including RCDs & GFCIs) are
suffering 'nuisance' tripping which seems to be inadequately character
Hello all,
Thanks for all the interesting replies, much appreciated.
All the best
James
From: Gert Gremmen; ce-test
Sent: 21 March 2018 11:07
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] EMC tests called up in Safety standards
The EMC tests as called out in 60335 are safet
If I remember correctly, the text in 60335 was prompted by an incident
in Denmark where a toaster incorrectly switched on due to EMI. Since the
work was done under pressure, it might not have been done in the most
appropriate way, but the end-result is as intended.
John Woodgate OOO-Own Opinio
The EMC tests as called out in 60335 are safety tests, contrary to
those called out under the EMCD that are functional tests only. For
Europe , one can discuss about the necessity of those tests, as the
EMCD requires testing in all operating modes including OFF or standby
and as long as one
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