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Topic Title: 3 phase meter behaviour with pv
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Created On: 13 October 2012 01:44 PM
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 13 October 2012 01:44 PM
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bajb

Posts: 560
Joined: 20 November 2002

Anyone know how a modern ampy dual rate 3 phase import meter in a domestic setting behaves when exporting on some phases and importing on another?

For example let us say I am generating 1kW on each phase from solar pv with no domestic baseload. On one phase (say L3) I then switch on a 2kW load. That means:
L1 - exporting 1kW
L2 - exporting 1kW
L3 - importing 1kW
So net I am exporting 1kW.

Will the meter:
- increment at a rate of 1kW because that is what is happening on one of the phases; or
- remain still because of the net export (because it cannot go backwards)?
 14 October 2012 11:37 AM
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alancapon

Posts: 5759
Joined: 27 December 2005

It all depends how it is configured. The Meter Operator should ensure that the meter is correctly configured when they / the DNO are notified of the PV connection. It may read 1kW export, it could read zero, or it could read 1kW import. It may also set a flag for the Meter Operator when it is next read.

Regards,

Alan.
 14 October 2012 11:53 AM
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bajb

Posts: 560
Joined: 20 November 2002

It certainly shows 'RED' like most modern meters I have seen in this area. I guess I'll have to do some experiments.
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