What Is Digital Three-phase Voltage Meter？
The ZHIMING ZM-3V Series Digital Three-phase Voltage Meter is designed for high-precision measurement of three-phase AC voltage in power distribution cabinets and electrical control systems. It delivers Class 0.5 accuracy with a digital tube display and local data query function, along with programmable voltage ratio settings and RS-485 communication using Modbus-RTU protocol. With support for switch input/output, analog signal output, a wide-range auxiliary power supply of AC/DC 80V–270V or AC 220V, and multiple form-factor options, this Three-phase Voltage Meter adapts to diverse cabinet wiring requirements in industrial and commercial power monitoring applications.
Code And Implication of the Digital Three-phase Voltage Meter
| Code | Implication |
|---|---|
| ZM | Marque Zhiming |
| 3 | Mesure triphasée |
| V | Voltage meter (for measuring AC voltage |
Working Conditions of the Digital Three-phase Voltage Meter
- Operating Temperature — -10°C to +55°C
- Storage Temperature — -25°C to +70°C
- Humidity — Relative humidity ≤ 93%, no corrosive gas present
- Altitude — No more than 2500m
Paramètres du produit
| Paramètres | Spécifications |
|---|---|
| Précision | Tension : Classe 0,5 |
| Connection Mode | Three-phase four-wire, three-phase three-wire |
| Tension nominale | AC 57.7V, 100V, 220V, 380V |
| Capacité de surcharge | 1.2× rated continuous, 2× rated / 1s instantaneous |
| Signal Power Consumption | <1VA per phase |
| Input Impedance | >300kΩ |
| Frequency Range | 45–65Hz |
Why Choose ZHIMING's Digital Three-phase Voltage Meter?
Class 0.5 High-Precision Three-phase Measurement
The Digital Three-phase Voltage Meter delivers Class 0.5 accuracy for true three-phase AC voltage measurement, supporting both three-phase four-wire and three-phase three-wire connection modes with a rated input range covering 57.7V to 380V.
Multi-Interface Integration & Communication
Equipped with RS-485 Modbus-RTU communication, 4 switch inputs, 3 relay outputs (AC 250V/5A, DC 30V/5A), and 3 analog output channels (0/4–20mA or 0–5/10V), this Three-phase Voltage Meter provides abundant I/O for seamless integration into SCADA, PLC, and energy management systems.
Wide-Range Power Supply & EMC Robustness
An ultra-wide auxiliary power input of AC/DC 80V–270V or AC 220V ensures stable operation under fluctuating supply conditions. Class 4 EMC immunity for ESD, electrical fast transient burst, and surge — combined with >100MΩ insulation resistance and AC 2kV withstand voltage — guarantees reliable performance in demanding electrical environments.
Flexible Form Factors & Standards Compliance
Available in multiple form factors to suit various cabinet layouts and wiring requirements. Fully compliant with GB/T 22264.1-2008 and GB/T 22264.7-2008, backed by competitive factory pricing (MOQ 100 pieces, 7–15 day stock) and dedicated ZHIMING engineering support.
FAQ
What voltage ranges and connection modes does this Three-phase Voltage Meter support?
The ZM-3V Series supports three-phase AC voltage measurement at 57.7V, 100V, 220V, and 380V rated input, with an overload capacity of 1.2× continuous and 2× instantaneous. Both three-phase four-wire and three-phase three-wire connection modes are supported.
How does the RS-485 communication work on this Digital Three-phase Voltage Meter?
The meter features one RS-485 channel operating on the Modbus-RTU protocol, with configurable baud rates from 1200 to 9600 bps (default 2400 bps). It connects directly to PLCs, HMIs, and SCADA platforms for real-time three-phase voltage monitoring, data logging, and remote parameter configuration.
How many I/O channels does this meter provide for external control?
The Digital Three-phase Voltage Meter offers 4 switch inputs for status monitoring, 3 relay outputs (AC 250V/5A, DC 30V/5A) for alarm signaling or load control, and 3 analog output channels (0/4–20mA or 0–5/10V) for retransmission to external controllers or chart recorders.
What is the programmable voltage ratio feature used for?
The programmable voltage ratio allows the display to scale the measured secondary voltage to the primary side value. This is especially useful when the meter is connected through voltage transformers (PTs), enabling direct readout of the actual line voltage without manual conversion.
What are the operating environment requirements for this Three-phase Voltage Meter?
The meter operates reliably in ambient temperatures from -10°C to +55°C, with storage tolerance from -25°C to +70°C. Relative humidity should not exceed 93% without corrosive gases, and the maximum installation altitude is 2500m.
