15-minute freeze + Bluetooth debugging, ADW300A adapts to charging piles and market-based electricity metering

Background

In the field of power monitoring and energy management, accurate metering, flexible transmission, and intelligent operation and maintenance have become core requirements for industry development. Recently, 11 provinces and cities across the country officially abolished fixed time-of-use pricing, ushering in a fundamental change in the power market. Faced with the new electricity billing model, countless industrial and commercial business owners are inevitably worried – when the fixed "peak-valley-flat" time period is broken, and electricity prices fluctuate in real time like the pulse of the market, how should factories control their electricity costs? Electricity prices may hit new lows during periods of high photovoltaic power generation, and may double during peak load periods; at this time, "extensive electricity use" will directly erode corporate profits. With its convenient installation design, it has become a stable and reliable intelligent monitoring terminal for various electricity usage scenarios.

Product Overview

The Acrel ADW300A is a three-phase wireless energy metering instrument designed for low-voltage distribution networks. It features a compact size, high metering accuracy, and comprehensive functionality. The instrument supports RS485 wired communication and is also compatible with various wireless communication methods such as LoRa, LoRaWAN, 4G, WiFi, and Bluetooth. It can be flexibly equipped with external current transformers, significantly improving its adaptability to on-site construction and installation. Whether integrated into distribution boxes or used for individual energy metering, operation and maintenance monitoring, or power monitoring, the ADW300A offers stable and reliable operation.

Product Advantages:

Power Freeze Function: Supports 15-minute demand cycles.

Adjustable Demand Cycle: Default demand cycle is 15 minutes (15, 30, 45, and 60 minutes are available).

Adjustable Slip Time: Default slip time is 1 minute (1, 2, 3, and 5 minutes are available). It can measure 8 types of maximum and real-time demand, namely forward active power, reverse active power, apparent power, A, B, and C phase currents, inductive reactive power, capacitive reactive power, maximum demand, and the time of maximum demand occurrence.

Typical Application Scenarios: Car Charging Stations. In the past, charging station projects often required higher-frequency power data for time-of-use billing and load analysis. The ADW300A's minute freeze function perfectly fills this need, making the origin and destination of every unit of electricity clearly traceable. In addition, it supports daily freeze (730 records) and monthly freeze (36 records) to meet the data statistics and traceability needs of different periods.

Multiple Communication Methods:

• Wired Communication: RS485 interface, supporting MODBUS-RTU and DL/T645-07 protocols.

• Wireless Communication (Multiple Optional Options): Lora / LoraWAN: Supports 470MHz, 868MHz, and 915MHz frequency bands, with an open transmission distance of 1km.

• 4G / WiFi: Supports power outage reporting, remote debugging, and breakpoint resume (up to 7000 data points).

• Bluetooth Function: Parameter configuration, data reading, and rate settings can be completed via an app using only a mobile phone.

• Flexible Protocols Without RS485 Cable Required for Debugging: 4G/WiFi supports multiple network protocols such as MQTT, HTTP, and TCP/IP pass-through.

• Optimized Button Interface: The meter's human-machine interface has been optimized. The meter buttons integrate commonly used functions, such as viewing parameters, switching display content, and manually triggering freeze, making on-site operation more convenient and eliminating reliance on external tools.

Application Scenarios

Scenario 1: Industrial Park Itemized Metering and Operation/Maintenance Monitoring

For the independent electricity metering and cost accounting needs of individual factories and production lines within large industrial parks, the ADW300A can transmit electricity data from each monitoring point to the park's energy management platform in real time via 4G wireless communication. Maintenance personnel can monitor the electricity usage in each area without frequent on-site visits, promptly identify abnormal electricity consumption, and achieve refined energy management.

Scenario 2: Commercial Complex Power Monitoring

Commercial complexes encompass various business formats such as shopping malls, office buildings, and hotels, resulting in complex and fluctuating electricity loads. The ADW300A supports multi-rate electricity statistics and demand management, facilitating accurate calculation of tenant electricity bills by property management companies. Simultaneously, through monitoring full parameters such as voltage, current, and harmonics, it can promptly identify safety hazards, ensure the reliable operation of the power distribution system, and effectively prevent electrical fires.

Scenario 3: Intelligent Upgrading of Old Power Distribution Rooms 

Addressing the challenges of limited space, difficult wiring, and the installation difficulties of traditional current transformers in old factory power distribution rooms, the ADW300A can be paired with Rogowski coils and open-type current transformers for uninterrupted installation. Combined with wireless communication, intelligent upgrades can be completed without extensive rewiring, significantly reducing construction difficulty, upgrade costs, and construction time.

Scenario 4: Electricity Monitoring of New Energy Charging Stations 

In electric vehicle charging station scenarios, the ADW300A can monitor the power quality, energy consumption, and load status of charging stations in real time. Data is uploaded to the operation platform via a 4G network, and remote alarm and power outage reporting functions are supported, providing reliable assurance for the safe operation, billing, and maintenance management of charging facilities.

In conclusion

the ADW300A wireless metering instrument integrates high-precision metering, flexible communication, intelligent alarm, and multi-scenario adaptability. Whether you are a system integrator, an operation and maintenance platform provider, or an end-user electricity enterprise, you can obtain a stable and scalable electricity monitoring experience from it.

Aaron Shi

Electrical Engineer Expert, Providing Service, consultant, product expert, professional manufacturer of energy efficiency management systemic solutions, and energy meters.