The core of power meter applications is precise measurement of electrical energy, comprehensive monitoring of circuit operation, and effective protection of electrical equipment. It has evolved from a traditional mechanical meter into a core digital node in the power system.
The functional evolution of modern power meters
Modern power meters go far beyond just "displaying numbers"—they integrate more intelligent features:
Full power measurement: can measure not only voltage and current, but also active/reactive power, power factor, frequency, demand, and even up to 63 harmonics.
Communication and connectivity: This is the key to intelligence. Data can be uploaded to the monitoring center via interfaces such as RS485 (Modbus) and Ethernet, enabling remote meter reading and status monitoring.
Event Recording and Fault Diagnosis: Records SOE (Event Sequential Record), accurate down to milliseconds, helping analyze accident causes.
Over-limit alarms and logic control: When parameters exceed limits (such as excessive current), the instrument can trigger local audible and visual alarms or automatically cut off the circuit via built-in relays.
Multi-rate and demand calculation: Supports time-of-use electricity pricing and maximum demand calculations to help users optimize electricity usage strategies.
