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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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    If the protection is on the inverter, it will be mentioned on the type-test certificate. If it isn’t fitted, then it shouldn’t be mentioned. ROCOF and Vector Change can be difficult to simulate correctly. They have obviously mentioned the non-trip settings, so I would try these as they are proving stability. I would  then use something well out, perhaps by a fact of 10 or more to see a trip. 


    Regards,


    Alan.
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  • 0
    If the protection is on the inverter, it will be mentioned on the type-test certificate. If it isn’t fitted, then it shouldn’t be mentioned. ROCOF and Vector Change can be difficult to simulate correctly. They have obviously mentioned the non-trip settings, so I would try these as they are proving stability. I would  then use something well out, perhaps by a fact of 10 or more to see a trip. 


    Regards,


    Alan.
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