Voltage Current Frequency Combination Meter

It is a high-precision digital three-phase multi-function power meter for real-time power monitoring. It supports three-phase three-wire / three-phase four-wire systems and uses true RMS measurement with 0.5% high accuracy.

It displays three-phase voltage, current, frequency, power factor, active power, and max/min/average values. With RS485 ModBus-RTU communication, four-button operation, and 60s auto-return to display.

Wide power supply: AC220V or AC85-270V/DC100-300V. Current input via CT, voltage direct or via CT. Supports CT ratio setting. Stable, low-power, and widely used in industrial power distribution and energy management.

• High accuracy 0.5% true RMS measurement
• Supports three-phase three-wire & four-wire
• RS485 ModBus-RTU communication
• Complete electrical parameters display

The three-phase VAF combination meter is designed for reliable performance in diverse industrial and commercial environments. It operates stably within a working temperature range of -10°C to +55°C, making it suitable for most indoor power distribution and measurement applications. For transportation and storage, the device withstands temperatures from -20°C to +75°C without damage. It supports a wide power supply range of AC85–270V or DC100–300V, ensuring compatibility with various power systems worldwide.

The meter functions effectively at a frequency range of 45–65Hz, matching standard global power grid specifications. It also features robust overload resistance, withstanding continuous 1.2× rated overload and short-term high current impacts, while maintaining low power consumption for long-term, energy-efficient operation.

This three-phase VAF combination meter integrates multi-parameter monitoring (voltage, current, frequency, power factor, active power, max/min/average values) in one compact unit, replacing multiple single-function meters to save space, cost, and wiring time.

With true RMS measurement, it delivers 0.5% high accuracy and ±0.02Hz frequency precision for reliable industrial power monitoring. It supports both three-phase three-wire and four-wire systems, with a wide power supply range (AC85–270V/DC100–300V) to adapt to diverse power distribution environments.The 4-button menu and 60-second auto idle return simplify setup and daily use. Equipped with RS485 Modbus-RTU communication, it enables easy remote data transmission and system integration. Built with overload protection, low power consumption, and wide temperature resistance (-10–55°C operating, -20–75°C storage), it ensures long-term durability and low maintenance, making it the ideal choice for efficient, accurate, and cost-effective three-phase power measurement.

1.Installation

• Wiring Mode: Support three-phase three-wire and three-phase four-wire systems. Current input via transformer; voltage can be direct access or via transformer. Common current ratio: 100/5A (magnification 20×).
• Power Supply: Connect to AC220V, or wide voltage AC85–270V / DC100–300V. Ensure stable power before wiring
• Environment: Install in indoor, ventilated place. Working temperature: −10°C to 55°C. Avoid moisture, vibration and strong electromagnetic interference.

2.Operation & Maintenance

• Power On: After installation, power on the meter; it will automatically start displaying real-time voltage, current, frequency and related power parameters.
• Data Viewing: Use the 4-button keypad to switch between different measurement pages and view all monitored values easily.
• Parameter Setting: Enter the menu via the confirm key to adjust CT ratio and other system settings; the meter saves changes automatically.
• Idle Auto-Return: The interface will return to the main display after 60 seconds of inactivity to prevent misoperation.
• Remote Communication: Access and read data remotely via the RS485 Modbus-RTU interface for system integration.