FXB-VAC9 Three-Phase Smart WiFi Energy Meter / Over/Under Voltage Protector

Product Positioning

The FXB-VAC9 is a three-phase four-wire intelligent protection device that integrates energy metering, real-time monitoring, and multiple protections . It uses a standard 35mm DIN rail for installation and is suitable for whole-house power distribution in residential buildings, commercial buildings, and end-point protection of three-phase equipment in industrial settings. An optional WiFi remote version is available, allowing for remote monitoring and control via a mobile app, making it a smart upgrade option for traditional energy meters and protectors.

Product Overview

• Three-phase four-wire system (3P+N), IN / OUT wiring corresponds to each other, simple installation.
• Real-time display of three-phase voltage, current, power factor, active/reactive/apparent power, frequency, and cumulative energy consumption (kWh).
• Built-in multiple protections including overvoltage, undervoltage, overcurrent, overfrequency, underfrequency, three-phase imbalance, phase sequence error, and phase loss.
• The WiFi version supports remote data viewing, remote on/off switching, and parameter settings via a mobile app, and also includes leakage protection, temperature protection, undercurrent protection, and power consumption statistics.
• The color display screen intuitively presents various power parameters and operating status, and supports page flipping for viewing.

Core Functions

1. Accurate metering : Three-phase voltage/current/frequency/power factor (PF)/active power (kW)/apparent power (VA)/reactive power (Var), 8-digit cumulative energy consumption (kWh) counting.
2. Multiple protections : overvoltage, undervoltage, overcurrent, overfrequency, underfrequency, three-phase imbalance, phase sequence error, phase loss.
3. Smart Interconnection (WiFi Version) : Remote monitoring, remote circuit breaker operation, and remote parameter modification via mobile app.
4. Advanced protection (WiFi version) : Leakage protection (protection against electric shock/fire), temperature protection (protection against wiring overheating), undercurrent protection (protection against no-load/water pump running dry).

Technical parameters

Standard version vs WiFi version

Application scenarios

• Whole-house electricity : The first line of defense after the main switch, protecting smart appliances from voltage fluctuations.
• Commercial/Industrial Three-Phase Equipment : Protects three-phase motors, air conditioning units, injection molding machines, etc., preventing motor burnout due to phase loss or incorrect phase sequence.
• Rental housing/dormitory : WiFi version supports remote meter reading and power outage management for overdue payments.
• Photovoltaic power generation system : Monitors grid-connected voltage stability to ensure safe system operation.