I assume as there is no standard for O-PEN devices then there is no defined field testing parameters, requirements or equipment to do so. Which questions their ongoing suitability to be kept in service.
Does anyone know if there will be a requirement to test these devices?
Similarly, BS 7671 doesn't require RDC-DDs to be tested - again, manufacturers may have functional test recommendations on installation and for regular maintenance.
Having read a little and watching a couple of videos about the pitfalls of trying to test a RDC-DD in EVSE (edit- with an electricians multifunction or RCD tester) such as those used for charging EVs at home there seems to be two problems.
First, because of the extended period they take to trip the meter may lock out and display over 300 milliseconds indicating a fail when it is actually working properly.
Secondly, again because of the extended period they take to trip, the meter keeps ramping the test current up during the trip sequence, then displays the trip current at the end of the period rather than the current that actually initially started the trip process, again indicating a fail when it is actually working properly.
support.myenergi.com/.../4403885493265-zappi-6mA-DC-protection-to-IEC-62955
Similarly, BS 7671 doesn't require RDC-DDs to be tested - again, manufacturers may have functional test recommendations on installation and for regular maintenance.
Having read a little and watching a couple of videos about the pitfalls of trying to test a RDC-DD in EVSE (edit- with an electricians multifunction or RCD tester) such as those used for charging EVs at home there seems to be two problems.
First, because of the extended period they take to trip the meter may lock out and display over 300 milliseconds indicating a fail when it is actually working properly.
Secondly, again because of the extended period they take to trip, the meter keeps ramping the test current up during the trip sequence, then displays the trip current at the end of the period rather than the current that actually initially started the trip process, again indicating a fail when it is actually working properly.
support.myenergi.com/.../4403885493265-zappi-6mA-DC-protection-to-IEC-62955
Having read a little and watching a couple of videos about the pitfalls of trying to test a RDC-DD in EVSE such as those used for charging EVs at home there seems to be two problems.
Well, the principal issue is that BS EN IEC 61557-6 does not consider RDC-DD's to BS IEC 62955, it is based around RCDs.
To decide to use an RCD tester for another purpose without checking limitations with the manufacturer of the test instrument (and possibly, in this case, the manufacturer of the RDC-DD under test) is perhaps not a great idea.
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