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ve.bus:grid-codes-and-loss-of-mains-detection [2018-08-22 12:43]
pba [LOM detection Type A and Type B]
ve.bus:grid-codes-and-loss-of-mains-detection [2019-09-13 15:50] (current)
marmour [How does LOM detection relate to overload shutdowns?]
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 ==== How does LOM detection relate to overload shutdowns? ==== ==== How does LOM detection relate to overload shutdowns? ====
  
-To detect a loss of mains, the inverter/​charger will constantly try to shift the AC frequency. When connected to a stable grid, with a normal accepted impedance, it will not be possible to do so, and it can therefor ​detect that the mains is still present. In case the mains was lost, the inverter/​charger will be able to shift the frequency at will, without any resulting correction currents.+To detect a loss of mains, the inverter/​charger will constantly try to shift the AC frequency. When connected to a stable grid, with a normal accepted impedance, it will not be possible to do so, and it can therefore ​detect that the mains is still present. In case the mains was lost, the inverter/​charger will be able to shift the frequency at will, without any resulting correction currents.
  
 When connected to a generator, or to a grid with a long extension cable or long ‘last mile’ cable, the pushing and pulling on the grid does create high currents, and as a result the inverter/​charger algorithm can become unstable and switch itself off in overload. When connected to a generator, or to a grid with a long extension cable or long ‘last mile’ cable, the pushing and pulling on the grid does create high currents, and as a result the inverter/​charger algorithm can become unstable and switch itself off in overload.
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 Some, bigger or better quality generators, will be able to work with LOM **Type B**. For other less stable generators it will be required to disable LOM entirely. In that case make the installation such that it is still safe: no simple extensions cords, use enclosed wiring cabinets with warnings on the outside and/or an external ENS. Some, bigger or better quality generators, will be able to work with LOM **Type B**. For other less stable generators it will be required to disable LOM entirely. In that case make the installation such that it is still safe: no simple extensions cords, use enclosed wiring cabinets with warnings on the outside and/or an external ENS.
  
 +More information here: https://​www.victronenergy.com/​live/​multiplus_faq
 ==== Q4: I use ESS, but have disabled feed-back, is a grid-code still required? ==== ==== Q4: I use ESS, but have disabled feed-back, is a grid-code still required? ====
  
 A: Yes, also in this case LOM is required to make for a safe and also local regulations compliant system. Running ESS with disabled-feed-back is still not the same as using a Multi in its default configuration without ESS.  A: Yes, also in this case LOM is required to make for a safe and also local regulations compliant system. Running ESS with disabled-feed-back is still not the same as using a Multi in its default configuration without ESS. 
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 ===== DISQUS ===== ===== DISQUS =====
 ~~DISQUS~~ ~~DISQUS~~
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ve.bus/grid-codes-and-loss-of-mains-detection.1534934593.txt.gz · Last modified: 2018-08-22 12:43 by pba