Industrial meter (A1 Port Only)
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 (PT)
Default value: 1.0
Adjust only if a voltage transformer is present
Current Scaling Factor
Represents the ratio of the current transformer (CT)
Default value: 1.0
Example If the installation uses a 100 A / 5 A current transformer, the correct current scaling factor is:
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
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 CT/PT ratios; recheck transformer specifications
Negative or reversed power
Phase order or CT polarity is incorrect; verify installation wiring
Unstable readings
Loose connections or incorrect grounding; inspect wiring and shielding
Notes for Installers
Always document CT/PT ratios
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