1. Product Overview
The SNHB-YDJC-3000A Sub-Metering Power Monitoring System is an IoT-based environmental electricity monitoring solution developed by Shengnan Environmental Protection.
It is designed for real-time and continuous monitoring of total enterprise electricity consumption, production equipment power consumption, and pollution control facility power consumption.
By connecting to the Environmental Power Supervision Platform, the system enables intelligent analysis of equipment operation status, including start/stop detection, abnormal operation identification, production restriction analysis, and process correlation analysis, helping regulators quickly identify abnormal environmental control behaviors.

2. Monitoring Parameters and Functions
Monitoring Parameters
Voltage and current
Power and power factor
Active and reactive energy
Operating status of production and pollution control equipment
Key Supervision Functions
Pollution control facility operation analysis
Over-limit and abnormal power consumption detection
Shutdown and production restriction verification
Process-to-treatment correlation analysis
Identification of idling, bypassing or unauthorized shutdown

3. System Architecture
3.1 Intelligent Metering Module
Designed for two-phase or three-phase low-voltage power systems
Supports RS485 communication
High-precision metering chip
Measures bidirectional active energy and four-quadrant reactive energy
Large backlit LCD display
Built-in data storage
Supports pulse output, load control and parameter configuration
Compact size and easy installation allow flexible deployment inside distribution cabinets.

3.2 Wireless Transmission Module
Industrial-grade cellular data terminal
Supports 4G / 3G / 2G networks
Interfaces: RS232, RS485
Industrial metal enclosure, wide temperature range (-35°C to 75°C)
Wide voltage input (5V–35V)
Strong resistance to moisture, lightning and electromagnetic interference
Supports overseas carrier networks
Equipped with multi-level watchdog, automatic reconnection, data retransmission and self-recovery mechanisms for unattended operation.

3.3 Data Processing and Supervision Platform
Real-time data upload to environmental supervision platforms
Cross-comparison with other environmental monitoring systems
Data visualization, trend analysis and statistical reports
Automatic alarms with SMS or platform notifications

4. Operating Mode
The system continuously monitors key electrical parameters of production and pollution control facilities:
Data is uploaded to the supervision platform
The platform analyzes and compares operational data
Abnormal conditions trigger alarms automatically
Notifications are sent to environmental enforcement personnel
The system supports province-, city- and county-level data sharing, enabling full-process environmental supervision and reducing manual inspection workload.

5. Key Features and Advantages
Advanced metering chip with industrial-grade signal processing
Real-time multi-parameter power monitoring
Flexible 4G wireless communication
Robust protection for harsh environments
Intelligent wake-up and automatic reboot
Reliable data transmission with no packet loss
Integrated temperature compensation and long-term auto-calibration

6. Technical Specifications

7. Typical Applications
Environmental electricity supervision for industrial enterprises
Online monitoring of pollution control facilities
Shutdown and production restriction enforcement
Industrial park centralized supervision
Heavy pollution weather emergency management
Remote environmental law enforcement