RS485 Metering Circuit Breaker-WRSM1-1P 🔍
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RS485 Metering Circuit Breaker-WRSM1-1P

WDYK RS485 Metering Circuit Breaker This circuit breaker is rail mounted and can directly replace traditional MCB, It has the function of collecting power consumption data at the load end and transmitting the data to the PLC through RS485 Modbus protocol. Customers can analyze which power consumption is redundant based on this data and turn off the corresponding equipment through the remote control function of the circuit breaker, thereby achieving energy-saving goals. After testing, this method can save 30% of energy consumption for enterprises

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Category: Smart Circuit Breaker

How to realize linkage control between an RS485 metering circuit breaker and a smart energy management system？

  1. Data Acquisition and Transmission (The “Eyes and Ears”)
    A data acquisition gateway​ (or communication management unit) is used as the intermediary. It communicates with multiple breakers via the RS485 bus (using the Modbus RTU protocol), collects real-time electrical parameters (voltage, current, power, energy) and status information (on/off, alarms), and then forwards this data to the upper-level EMS via Ethernet or 4G.
  2. Strategy Formulation and Decision-Making (The “Brain”)
    The EMS platform receives, stores, and visualizes the data. Based on predefined automation strategies, it makes control decisions. Common strategies include:
    • Peak Shaving:​ When the total monitored power approaches the contract capacity, the system automatically issues load shedding commands.
    • Time-of-Use Management:​ Automatically turns off non-essential circuits during peak electricity rate periods.
    • Anomaly Alarm Linkage:​ Automatically trips the corresponding breaker upon receiving an overload or leakage alarm from the device.
  3. Command Issuance and Execution (The “Hand”)
    The control commands issued by the EMS are sent to the data acquisition gateway. The gateway then converts these commands into standard Modbus RTU write command frames (e.g., writing to a specific relay control register) and sends them via the RS485 bus. The target breaker receives the command and executes the remote opening or closing operation, completing the closed-loop control.

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