May 20, 20233 yr Anyone know what the Upper and Lower limits are of the Grid Frequency? Baseline: 50Hz Looking at setting up alerts in what my inverter measures
May 21, 20233 yr On 2023/05/20 at 8:48 PM, grant.cpt said: Anyone know what the Upper and Lower limits are of the Grid Frequency? Baseline: 50Hz Looking at setting up alerts in what my inverter measures As spesified by:NRS 048-2:2004 Edition 2.1 Grid ± 2,5% (± 1,25 Hz) lower limit = 48,75hz upper limit = 51,25hz Edited May 21, 20233 yr by TaliaB
May 21, 20233 yr How accurate are the Axpert inverters at reading the frequency? I'd also like to set an alert for mine, I've noticed incredible fluctuations the past 60 days.
May 22, 20233 yr Author 15 hours ago, Chris.P.Bacon said: How accurate are the Axpert inverters at reading the frequency? I'd also like to set an alert for mine, I've noticed incredible fluctuations the past 60 days. Good question. @Coulomb could you perhaps shed some insight?
May 22, 20233 yr 16 hours ago, Chris.P.Bacon said: How accurate are the Axpert inverters at reading the frequency? I'd also like to set an alert for mine, I've noticed incredible fluctuations the past 60 days. Can you post a graph of the frequency measured over say a day.
May 22, 20233 yr 16 minutes ago, Scorp007 said: Can you post a graph of the frequency measured over say a day. @Scorp007 here is the frequency in my area for the last 12 hours. Lowest at 49.6 H but I've seen it slightly lower. And for interest sake here is the grid voltage as well. Edited May 22, 20233 yr by Antonio de Sa
May 22, 20233 yr 57 minutes ago, Antonio de Sa said: @Scorp007 here is the frequency in my area for the last 12 hours. Lowest at 49.6 H but I've seen it slightly lower. And for interest sake here is the grid voltage as well. So all together no problem at all. Thanks for the pics.
May 22, 20233 yr My averaging function was the problem, apologies. Grid voltage between 240V to 244V feels high? Edited May 22, 20233 yr by Chris.P.Bacon
May 22, 20233 yr On 2023/05/22 at 7:32 AM, Chris.P.Bacon said: How accurate are the Axpert inverters at reading the frequency? I would think very good. The DSP is of course running off a crystal, and there is capture hardware used, and an interrupt dedicated to zero crossing of the AC input. Frequency measurement is simple with that setup.
May 23, 20233 yr 10 hours ago, Chris.P.Bacon said: Grid voltage between 240V to 244V feels high? Then don't touch it! 🤪 230V±10% is the spec, so as long as it's not over 253V, it's still within spec.
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.