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Loss of mains for type tested generation units

Jam
Hi all,


I'm reviewing the Loss of Mains protection for a number of old (pre-2018) G59 type tested inverters. While for site commissioned units it is required to note the LOM detection method, the "G59 certificate" only records operation time. I haven't managed to find (yet) a statement that it must be a certain method; G59 only seems to say that the parameters must be XX for each method (depending on age) and leaves it open to the manufacturer to decide. Does anyone know where it states which method is used? I'm also trying manufacturers but not all of them still exist!


It's always been a niggle at the back of my mind, but it's not been an issue... Now with the ENA's requirement to update old settings it's relevant.


Ta,

Jam
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    Strictly 7b is just a test for a no trip, so it may actually never sense VF or rate of change at all, and pass that test. We do not know for what it is setup for if anything

    I agree section 6 is clear and the nominal settings of 47 and 52 Hz for fast trip match the test results well, and are already near the proposed new settings.
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    Strictly 7b is just a test for a no trip, so it may actually never sense VF or rate of change at all, and pass that test. We do not know for what it is setup for if anything

    I agree section 6 is clear and the nominal settings of 47 and 52 Hz for fast trip match the test results well, and are already near the proposed new settings.
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