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perma-batteries asked

3phase ESS EM24 gavazzi with CT >65A

Hello,


We're going to use an 3ph ESS system in parallel connection to the main board, we have more than 100A per phase. Victron states in the Energy Meters live that for more than :

Q8: I want to use Current Transformers (CTs), is that possible?

Yes. You can buy the CG EM24DINAV53DISX directly from Carlo Gavazzi or one of their distributors. Even though Victron does not stock that type of meter, we do support it in our software.

The EM24DINAV53DISX is the solution for three-phase systems that go over 65A per phase.

However, when you check Gavazzi's datasheet for the above reference, the CT has an Imax of 10A per phase only ! Does anyone has experience with EM24 with CTs, and why would the current limit be so low, whereas Victron states than it can go above > 65A per phase ?

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ESSEnergy Meter
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2 Answers
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Mike Dorsett answered ·

Whilst no experience with this particular meter, in general High current CT's tend to have a secondary current of 5A (or 1A for some types) Thus having a meter designed for CT's with a per phase current input of 10A will give you a 2:1 overload factor. The CT ratio (eg 100/5A) will be programed into the meter during set up, so will allow currents up to in excess of 3000A per phase - if you have the right CT's.

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kuban-invertor avatar image
kuban-invertor answered ·

good afternoon! did you manage to connect ESS with a counter? will the function "multi-phase control - common to all phases" work? Thanks

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