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pv-bauer asked

VM-3P75CT monitoring all MultiPlus IN and OUT ports possible?

Hello,
in the block diagramm the MultiPlus-II has only an internal current sensor in the AC IN L.
So I don't see the PV input from the PV-Inverter on AC OUT.


Is it possible to use the VM-3P75CT to monitor all AC IN and AC OUT from a MultiPlus-II in a one Phase system?

For example:
- AC OUT 1 L -> CT1 - L1 and N and PE (power supply of the VM-3P75CT)
- AC OUT 2 L (Relay output) -> CT2 - L2
- AC IN L (2xNA Relay input) -> CT3 - L3
So it would be possible to monitor the MultiPlus with only one Device.
(The current sensor transformers seems to be small enough to be fitted next to the VAC 230V Connections under the black hood.)


Or do I have to take the
- AC IN L (2xNA Relay input) -> (internal or) external Current Transformer for MultiPlus-II (CTR 11xx / CTR 12xx) on Current sensor Port
- AC OUT 1 -> AC Current sensor - single phase - max 40A on AUX1 Port
- AC OUT 2 (Relay output) -> AC Current sensor - single phase - max 40A on AUX2 Port


Multiplus-IIEnergy MeterAC PV Coupling
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1 Answer
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ejrossouw answered ·

@PV_Bauer If ALL the loads are on the ACOUT side, then you only require either an ET112 or AC current sensor in addition to the MP's internal metering. Otherwise the EM540 (or 530 with CTs) may be worth looking at. The VM-3P75CT cannot be used in the way you propose being either single or three phase.


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