Energy meters

An energy meter gives the EMS the measurements it controls on. The most important one is the grid meter on the grid connection: it is the reference for peak shaving, capacity management and the limits of the connection. Submeters follow a sub-circuit, such as a production installation or a group of loads.

flowchart LR
    N["Grid"] --> K["Grid meter"]
    K --> B["Site distribution board"]
    B --> S1["Submeter on a sub-circuit"]
    B --> S2["Submeter on a sub-circuit"]

Current and voltage transformers

On a connection with instrument transformers, the meter sees secondary values. On most meters you set the CT and PT ratios on the meter itself, so it already reports primary-side values: this is the case for Acrel, BMR, the Schneider PM5000 and the Siemens PAC. For the Fluvius A1 meter and the Xemex Smart Connect, you enter the ratios in the EMS. Never set them in both places, or the values are converted twice.

RS485 addresses

• Give every device on the RS485 bus a unique address. The device manual explains how.
• Use the low addresses first: 1, 2, and so on.
• Keep the factory settings for baud rate, parity and stop bits, unless there is a reason to change them.

To make an RS485 device reachable over the network, see RS485 to Modbus TCP.

Brands

All models per brand are in the overview list.