Device integrations

Industrial meter (A1 port only)

Connect a Fluvius industrial meter to the Voltmasters EMS controller through its A1 port, for medium and high voltage installations.

Industrial meter (A1) installation guide

This guide applies only to installations using an industrial meter connected via the A1 port, typically found in medium- or high-voltage systems.

Step 1: Physical connection

Connect the industrial meter to the Controller using the designated A1 interface as specified by the meter manufacturer.

Verify that the A1 wiring is correctly terminated
Ensure polarity and phase order are respected
Confirm the Controller is powered on before configuration

Step 2: Add the A1 meter to the system

When registering a new A1 meter in the system, you will be prompted to configure scaling factors. These parameters are critical for accurate measurements and must match the transformer ratios used in the installation.

Step 3: Configure scaling factors

Industrial meters measure secondary values from transformers. The system converts these into real-world values using scaling factors.

Voltage Scaling Factor

Represents the ratio of the voltage transformer (TP)
Default value: 110.0 V
Adjust only if a voltage transformer is present
Example
If the installation uses a 15400 V / 110 V Voltage transformer, the correct voltage scaling factor is:

15400 ÷ 110 = 140

Current Scaling Factor

Represents the ratio of the current transformer (TI)
Default value: 5.0 A
Example
If the installation uses a 100 A / 5 A current transformer, the correct current scaling factor is:

100 ÷ 5 = 20

Total scaling factor

Represents the ratio of the current and voltage transformers together.
Example
If the installation uses a 140 (TP) x 20 (TI) transformer, the correct total scaling factor is:
```
140 x 20 = 7000
```

Label on a Fluvius industrial meter with the CT ratio 250/5 A times 50 and the VT ratio 15400/110 V times 140 written on by hand, and the resulting billing factor.

Step 4: Verification

After configuration, verify correct operation:

Check that voltage, current, and power values are displayed
Compare readings against known reference values or utility data
Confirm phase balance and direction of power flow

Troubleshooting

Issue	Likely Cause & Resolution
No data from meter	Incorrect A1 wiring or communication settings; verify connections and meter protocol
Values too high or too low	Scaling factors do not match TP/TI ratios; recheck transformer specifications
Negative or reversed power	Phase order or TI polarity is incorrect; verify installation wiring
No Voltage displayed	Some older meters (DSMR 2.2) or specific brands (Landis+Gyr) do not send voltage data. This is a limitation of the meter itself, not the controller.
Unstable readings	Loose connections or incorrect grounding; inspect wiring and shielding

Notes for installers

Always document CT/PT ratios