Generally, Climkit provides the Eastron SDM630 Modbus meter, but other models with similar features and sizes may be delivered depending on available stock.
For panels with GRD meter panels, DIN rail enclosures with mounting plates can be ordered.
DIN rail enclosure on T mounting plate (H: 36cm, L: 21cm)
4. Installation and Configuration
Direct Meter
Connect the phases to the network side at the top (L1, L2, and L3).
Connect the consumer (or photovoltaic inverter) at the bottom (L1, L2, and L3).
Connect the neutral at the top and/or bottom of the meter (N).
Indirect Meter and Current Transformer (CT)
Warning! It is essential to carry out the configuration procedure below immediately after installing the meter. Otherwise, the measurement will not be accurate!
CT Ratio: The CT ratio 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 certified MID meter. If there is an error, the meter must be replaced!
Press the "E" button for 3 seconds and enter the default password (1000) using the "P" and "M" buttons. Confirm by pressing "E" for a long time.Navigate to "CT rate".Press the "E" button for 3 seconds and enter the corresponding CT rate for the primary current of the installed CT according to the table below. Confirm by pressing "E" for a long time.
Primary Current
CT Rate (Ratio)
100 A
20
200 A
40
400 A
80
600 A
120
800 A
160
1000 A
200
1500 A
300
2000 A
400
Voltage Measurement (U): Connect neutral to N and each phase to L1, L2, and L3. Also connect LA with L1 and NA with N to power the meter.
Current Measurement (I): Open and securely close each CT on each phase of the cable where current measurement is desired. Connect the S1 (white) and S2 (black) wires from the CT to the top of the meter for each phase.
Verification of 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 displayed values should be close to 0.9. If this is not the case, the voltage measurement and current measurement are not on the same phase. Move the S1 and S2 pairs to another phase until obtaining a correct value.
To avoid disturbances during this verification on a consumer or introduction meter, temporarily trigger the photovoltaic inverters on-site.
Verification of CT Direction: Press the "P" button until the instantaneous active power (kW) is displayed for each of the phases L1, L2, and L3. The values must be positive (consumer meter) or negative (production meter) indicated by the "-" sign. Always check the introduction meter with the on-site inverters triggered to obtain positive values. Do not rely on the arrow indicated on the CT. If the indicated value is not in the right direction, swap the S1 and S2 wires of the phase.
Bus Communication Connection
The meters (Slaves) are connected via an RS485 bus network to the gateway (Master) as shown in the diagram below.
The bus connection requires careful and rigorous work. For new panels, it is recommended to do this in the workshop and to use a type U72 shielded cable 4 x 0.8mm².
