Voltage reading between supply live and disconnected load neutral

[Derlyn]

@ Die sparky

If you read carefully he was measuring to the neutral wire AFTER disconnecting it from the neutral bar, in which case there shouldn't be a voltage unless the neutral is touching earth somewhere, which I suspect.

The only time you gonna measure 220v between live and neutral is if the neutral is connected to the neutral bar.

[Die sparky]

True but there seems to be alot going on with his installation perhaps even a reversed polarity somewhere?

[aquamoon]

You mention that when on grid power there are intermittant trips but not when in islanding mode.

From the above I seem to think that there's no earth neutral bridge when the inverter is in islanding mode, so the earth leakage cannot trip even if there's an earth fault.

I'm gonna stick my neck out and say there are 2 faults.
1. An intermittant earth fault on the neutral.
2. No earth neutral bridge when in islanding mode.

Good luck.

The Victrons have a relay that makes an earth neutral bridge when in islanding mode.


Sent from my iPhone using Tapatalk

[GCE]

Should the inverters be connected directly to mains and not via the earth leakage? When on grid there are essentially 2 earth leakages power will flow through to any endpoint. The sans recommended layout for a UPS system seems to indicate doing it the way I have done it.


Sent from my iPhone using Tapatalk

Something sounds wrong with the positioning of your ELU - Should be mains power - inverter - earth leakage -plug CB

I am reading that you have the ELU before the inverter ?

The Annex P shows ELU but be careful that they are not referring to a +/- 100ma unit because no decent earth can be obtained

[aquamoon]

Something sounds wrong with the positioning of your ELU - Should be mains power - inverter - earth leakage -plug CB

I am reading that you have the ELU before the inverter ?

The Annex P shows ELU but be careful that they are not referring to a +/- 100ma unit because no decent earth can be obtained

I do have the inverters connected after the main EL. I also have an EL for each of the 2 outputs of the combined inverters outputs.

So when on grid power, power flows through 2 EL’s to an endpoint (e.g a plug point) Could this, having power flow through 2 EL’s be causing a problem?

I felt that having the inverters on the min EL would be a safer option if something were to go wrong with the inverters themselves although Aircon’s are not connected to EL because they often cause nuisance trips being exposed to the elements. They are also “supposedly” out of reach of users.

Could you explain more about your comment on Annex P?


Sent from my iPhone using Tapatalk