Jump to content

High voltage from Eskom


zs1ssm

Recommended Posts

Recently I have noticed that when power is restored after loadshedding that my inverter would go in safe mode and gives a error 08--Bus voltage to high--I have monitored the utility power when it comes back and voltages of up to 350VAC was measured for about 15 seconds then drops rapidly to 90VAC---Surge protectors are installed but it only helps with a spike but not a constant high/low voltage--Any suggestions please 

Link to comment
Share on other sites

Energy-Jason
This post was recognized by Energy-Jason!

PsyWulf was awarded the badge 'Helpful' and 50 points.

On 2023/01/04 at 5:49 PM, zs1ssm said:

Recently I have noticed that when power is restored after loadshedding that my inverter would go in safe mode and gives a error 08--Bus voltage to high--I have monitored the utility power when it comes back and voltages of up to 350VAC was measured for about 15 seconds then drops rapidly to 90VAC---Surge protectors are installed but it only helps with a spike but not a constant high/low voltage--Any suggestions please 

You get High/Low voltage timer reset breakers that can "delay" returning after any voltage anomaly

Link to comment
Share on other sites

28 minutes ago, PsyWulf said:

You get High/Low voltage timer reset breakers that can "delay" returning after any voltage anomaly

Perfect answer right here, many places will have some kind of voltage monitor you can install before the inverter to cut it off from mains until the voltages stabilize. If you are looking for a cheaper option, since most DIN voltage devices can be a little pricy, you can also use a high current timer. I have just set a 5 minute delay before connecting to the grid and I haven't run into any issues thus far 👍

Link to comment
Share on other sites

On 2023/01/04 at 11:49 AM, zs1ssm said:

Recently I have noticed that when power is restored after loadshedding that my inverter would go in safe mode and gives a error 08--Bus voltage to high--I have monitored the utility power when it comes back and voltages of up to 350VAC was measured for about 15 seconds then drops rapidly to 90VAC---Surge protectors are installed but it only helps with a spike but not a constant high/low voltage--Any suggestions please 

Is there a safety code setting on your inverter? 

Mine (Goodwe) has different codes for different territories. In the default mode it seems to accept whatever is coming from the grid as long as it's 50Hz. 

If I run it with settings for SA then it monitors the grid but will disconnect (or not reconnect) if grid voltage is too high or too low. 

See this screen shot. Load shedding recently ended, but grid voltage is low. The inverter sees that voltage, but hasn't reconnected and continues to put out 230ish V AC. 

At some point (around 200V) the inverter will reconnect and match its own output with the grid. 

High voltage is not a problem where I live. 

 

 

Screenshot_20230105_184239_PV Master.jpg

Link to comment
Share on other sites

5 minutes ago, Bobster. said:

Is there a safety code setting on your inverter? 

Mine (Goodwe) has different codes for different territories. In the default mode it seems to accept whatever is coming from the grid as long as it's 50Hz. 

If I run it with settings for SA then it monitors the grid but will disconnect (or not reconnect) if grid voltage is too high or too low. 

See this screen shot. Load shedding recently ended, but grid voltage is low. The inverter sees that voltage, but hasn't reconnected and continues to put out 230ish V AC. 

At some point (around 200V) the inverter will reconnect and match its own output with the grid. 

High voltage is not a problem where I live. 

 

 

Screenshot_20230105_184239_PV Master.jpg

When using any inverter that can be used as grid tied one must use a grid code accepted in the country and that will dictate the borders for volts, Hz etc. Aus seem to have stricter rules to be adhered to than Eur for instance. I see a number of grid codes available that were not some 3 years ago. 

Link to comment
Share on other sites

  • 2 weeks later...
On 2023/01/04 at 12:49 PM, zs1ssm said:

Recently I have noticed that when power is restored after loadshedding that my inverter would go in safe mode and gives a error 08--Bus voltage to high--I have monitored the utility power when it comes back and voltages of up to 350VAC was measured for about 15 seconds then drops rapidly to 90VAC---Surge protectors are installed but it only helps with a spike but not a constant high/low voltage--Any suggestions please

@zs1ssm Have a look at the below post touching on the same subject. Cheers.

 

Link to comment
Share on other sites

  • 2 weeks later...

Yes , i know this is dumb , but so far it seems to work fine for me. I always make sure my electric kettle is on - powered from mains BEFORE the inverter , the 2+kw resistive load seems to help clamping incoming spikes after the power comes on after loadshedding. 

Power comes on , kettle starts to boil , make a cup of , and the rest of the boiling water goes into the thermos flask. So no real wastage of boiling the kettle. 

Any real sparkies free tell me i'm an idiot , and that doing this is helping boggerall .... in that case , please give a better , cheap solution.

Link to comment
Share on other sites

I had the case in the Strand that the grid tie inverter I used would not connect as the line voltage was above 250V - think it was around 253V . Had to report it to COC and they send out their electricians to come and measure the incoming voltage at the pole . Then they got the Line electrician to tap down the transformer. That solved the problem and the inverter has been running happily since - think the code checking build into the inverters are pretty decent. 

Link to comment
Share on other sites

  • 5 months later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...