Single-phase Power Meter

Product Advantages

0.5-Class Measurement Accuracy & Dual Relay Over-limit Protection

Leveraging SMT technology, it achieves 0.5-class accuracy for voltage/current and 1.0-class for energy, ensuring precise data for billing and energy analysis.

Equipped with two sets of alarm relays (each with 1 normally open + 1 normally closed contact), it triggers alerts when voltage/current exceeds custom thresholds, protecting electrical equipment (e.g., household appliances, industrial motors).

Intuitive Display & Over-range Prompt

Default transmission signals include DC 010mA, 020mA, or 4~20mA (load ≤500Ω); customized voltage output is available for specific monitoring systems.

The 4-digit LCD displays values (0~9999) clearly; it shows "EEEE" for over-range and "-EEE" for under-range, simplifying fault identification.

Seamless Smart Integration & Multi-rate Billing Support

Supports Modbus-RTU protocol via RS485, enabling integration with smart home systems (e.g., Alexa, Google Home) and industrial automation platforms for remote monitoring.

Compatible with time-of-use (TOU) and multi-rate billing structures, helping users save costs by encouraging off-peak energy usage.

Technical Parameters

Applications

Residential Energy Management & Small Businesses

Monitors energy consumption of individual appliances (e.g., air conditioners, water heaters), helping homeowners identify high-energy devices and optimize usage.

Tracks peak/off-peak electricity usage for shops, offices, and workshops, enabling owners to adjust operational hours (e.g., shift heavy machinery to off-peak times) and reduce energy costs.

Rental Properties & Renewable Energy Systems

Provides accurate energy metering for apartments or commercial rentals, ensuring fair billing among tenants and avoiding disputes over energy costs.

Monitors power generation from residential solar panels or small wind turbines, tracking self-consumption and grid feed-in to maximize renewable energy utilization.

Selection Guide

Determine input type (AC/DC) based on the electrical system (e.g., AC for household grids, DC for solar systems).

Confirm voltage/current range (AC220/380V, 5A) matches on-site requirements—use current transformers if current exceeds 6A.

Select transmission output signal (e.g., 4~20mA for long-distance data transmission) based on monitoring system needs.

Check if smart home integration is required (e.g., for homeowners using smart energy management platforms).

Choose based on billing needs—opt for multi-rate support if the local power company uses TOU pricing.

Operation Guide

Installation

Follow 3P4L/3P3L wiring standards (refer to terminal labels for Ua/Ub/Uc/Un). Consult a licensed electrician if unfamiliar with electrical wiring to avoid hazards.

Power-up & Initial Check

Connect to AC220V power; ensure the "A" (ammeter) or "V" (voltmeter) indicator light is on. Confirm the LCD displays real-time values correctly.

Calibration

Conduct calibration every 2~3 years (by professional technicians) to maintain 0.5-class accuracy, especially in harsh environments (e.g., high humidity).

Remote Monitoring Setup

Configure RS485 parameters (ID: 004, baud rate: 9600) via the device’s interface, then connect to a Modbus-RTU compatible system for remote data access.

Alarm Handling

If an over-limit alarm is triggered, check the LCD for "EEEE"/"-EEE" and adjust thresholds (via "Up"/"Down" keys) or inspect the electrical system for faults (e.g., voltage surges).