Table of Contents

Electric meters

1. Direct meters (≤80A)

Direct meters for connections below 80A.

Typically, Climkit supplies the Eastron SDM630Modbus meter, but other models with similar features and size may be delivered depending on stock availability.

2. Indirect meters (>80A)

Model used: Eastron SDM630MCT

Current transformer (CT)

Determine the type of CT according to the intensity of the connection (amperage).

The CTs clip directly onto the cable or copper bar of each phase. Pay attention to the section of the cable in relation to the diameter of the CT.

Other CTs can be ordered for specific cases with a larger diameter. Please specify when ordering.

Useful link: Eastron CT Data Sheet

3. T-shaped meter plate and DIN rail housing

For panels with DSO meter plates, it is possible to order DIN rail boxes with fixing plate.

DIN rail box on T mounting plate (H: 36cm, L: 21cm)

4. Installation and configuration

Direct counter

Connect the network side phases from above (L1, L2 and L3).

Connect the consumer (or the photovoltaic inverter) from below (L1, L2 and L3).

Connect the neutral at the top and/or bottom of the meter (N).

Indirect meter and current transformer (CT)

Attention ! It is essential to carry out the configuration procedure below as soon as the meter is installed. Otherwise the measurement will not be correct!
  1. CT Ratio:
    The CT ratio (CT rate) is equal to the primary current of the CT divided by its secondary current. The primary current is indicated on the CT. The secondary current is 5A.
    Caution ! The ratio can only be set once on a MID certified meter. In the event of an error, the meter must be replaced!
    Press the "E" key for 3 seconds and enter the default password (1000) with the "P" and "M" keys. Confirm by pressing "E" for a long time.
    Navigate to “CT rate”.
    Press the "E" key for 3 seconds and enter the CT rate corresponding to the primary current of the CT installed according to the table below. Confirm by pressing "E" for a long time.

    Primary current

    CT rate (ratio)





    400 A


    600 A


    800 A


    1000 A


    1500 A


    2000 A


  2. Voltage measurement (U):
    Connect the neutral to N and each phase to L1, L2 and L3.
    Also connect LA with L1 and NA with N to power the meter.
  3. Current measurement (I):
    Open and close each CT on each phase of the cable whose current you wish to measure.
    Connect wires S1 (white) and S2 (black) from the CT to the top of the meter for each phase.

  1. Checking the voltage and current connection:
    Press the “M” button until the Power Factor (PF) is displayed for each of the phases L1, L2 and L3.
    The values displayed should be close to 0.9.
    If this is not the case, the voltage measurement and the current measurement are not on the same phase. Move pairs S1 and S2 to another phase until you obtain a correct value.
    To avoid disturbances during this verification on a consumer or introduction meter, momentarily trigger the site's photovoltaic inverters.
  1. Verification of the meaning of the CT:
    Press the “P” button until the instantaneous active power (kW) for each phase L1, L2 and L3 is displayed.
    Values must be positive (consumption counter) or negative (production counter) indicated by the "-" sign.
    Always check the input meter with the site inverters triggered so that positive values are obtained. Do not trust the arrow indicated on the CT.
    If the indicated value is not in the correct direction, reverse the phase wires S1 and S2.

Connection of the communication bus

The meters (Slaves) are connected by an RS485 bus network to the gateway (Master) according to the diagram below.

Connecting the bus requires careful and rigorous work. For new panels, it is recommended to do it in the workshop and to use a shielded U72 type cable 4 x 0.8mm2.

How Did We Do?

WiFi network

MBus-RS485 converter