# 3 Phase < 4000A

This setup consists of 3 components:

* The 'Carlo Gavazzi EM210' energy meter with Rogowski Coils
* The 'Finder Arduino Opta' data collection unit
* The 'Blues Wireless for Opta' wireless communication unit (optional)

#### Power Supply

Both the Opta and the Blues devices must be powered with 24v DC.

The energy meter is powered from the mains supply being monitored. Please refer to the manual to understand the wiring for different number of phases.

#### Communication

The Opta and the Blues devices communicate via a built in connection. Care should be taken to ensure the two units are firmly pushed together.

The energy meter and Opta communicate over an RS485 interface. This should be wired during installation according to the pdf manual at the end of this page.

For EM210+Opta, connect A to B and B to A.

#### Rogowski Coils

Each coil should be wired into the energy meter according to the diagram on the device.

The coils can then be opened and place around each of the phases to be monitored.

<figure><img src="/files/k76qN3Z35jJpsemgo89R" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/X6HFB20wXfQovMQcVjVX" alt=""><figcaption></figcaption></figure>

#### Energy Meter Parameters

Once installed and powered on the meter needs to be set to the following parameters:

* SYS should be 3P
* bAud should be 19,2
* SEnSOr should be roG

The instructions on how to navigate the menu and set parameters can be found in the manual below under Menu Map and Parameter Menus. The default password to enter the parameter menu is 0.

Manual:

<https://www.gavazziautomation.com/fileadmin/images/PIM/MANUALS/ENG/EM210_IM.pdf>

Datasheet:

<https://www.gavazzionline.com/pdf/em210ds.pdf>

Purchase links:

{% embed url="<https://uk.rs-online.com/web/p/energy-meters/2238048>" %}

{% embed url="<https://uk.rs-online.com/web/p/current-transformers/2224405?gb=s>" %}


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