Three Phase Digital Combined Meter from China Suppliers - High-Performance Factory Solution for Power Monitoring
Product Overview
Its core application focuses on the accurate measurement and visualization of three-phase current, three-phase voltage, and grid frequency, with scalable parameter options to meet diverse user requirements for power system diagnostics and efficiency analysis.
The Instrument offers flexible, configurable measurement ranges to accommodate both three-phase three-wire (3P3W) and three-phase four-wire (3P4W) system topologies, with the following parameter coverage:
- Current Measurement: Accurate RMS current detection for all three phases — IA (Phase 1 Current), IB (Phase 2 Current), and IC (Phase 3 Current).
- Voltage Measurement: Comprehensive RMS voltage monitoring including phase voltages (UA = L1-N, UB = L2-N, UC = L3-N) and line-to-line voltages (UAB = L1-L2, UBC = L2-L3, UCA = L3-L1), totaling six independent voltage channels.
- Extended Parameter Options: Available in multiple variants with additional measurement functions to suit specific application needs.
🔵 Basic Variant
Grid frequency measurement (typically 45–65 Hz)
🟡 Mid-Range Variant
Frequency + power factor (capacitive/inductive range) measurement
🟢 Advanced Variant
Frequency + active power (W/kW/MW) measurement
Advanced SMT Construction
State-of-the-art Surface Mount Technology delivers a compact, dense circuit layout that minimizes internal signal interference, enhances structural stability, and provides superior reliability in harsh industrial environments with high vibration, temperature fluctuations, or EMI.
True RMS Measurement with AC Sampling
High-precision AC sampling with a true RMS algorithm ensures accurate readings regardless of waveform distortion caused by non-linear loads such as VFDs, rectifiers, switching power supplies, or arc furnaces — eliminating errors from distorted waveforms.
Programmable Display Scaling & Wide CT Compatibility
User-programmable display multiplier enables seamless calibration to match CT ratios with primary current ratings from 5 A to 10,000 A. Compatible with standard 1 A or 5 A secondary CT output, allowing direct display of primary system current values on-site.
Technical Parameters
| Technical Parameters | Index | ||
|---|---|---|---|
| Input | Network | Three-phase three-wire, three-phase four-wire | |
| Voltage | Rated Value | AC 0~500V | |
| Over Load | Consistent: 1.2× ; Instantaneous: 2× / 30s | ||
| Consumption | <0.5VA (each phase) | ||
| Impedance | >500kΩ | ||
| Current | Rated Value | AC 1A, 5A | |
| Over Load | Consistent: 1.2× ; Instantaneous: 2× / 1s | ||
| Impedance | <2mΩ | ||
| Frequency | 45–65 Hz | ||
| Output | Communication | Output Mode | RS485 |
| Protocol | MODBUS RTU | ||
| Baud Rate | 1200, 2400, 4800, 9600 | ||
| Technical Parameters | Index | ||
|---|---|---|---|
| Output | Analog Quantity | Channel Quantity | 4 channels |
| Output Mode | 0~20mA, 4~20mA | ||
| Load Ability | ≤400W | ||
| Switching Value | Channel Quantity | 4 channels | |
| Output Mode | Normally open relay contact output | ||
| Contact Capability | AC 240V / 0.1A | ||
| Switching Value Input | Four channel dry contact input modes | ||
| Display Mode | LED (Red) | ||
| Measuring Accuracy | Voltage, Current | ± (0.5%FS + one digit) | |
| Active Power, Reactive Power | ± (0.5%FS + one digit) | ||
| Frequency | ± 0.1 Hz | ||
| Power Factor | ± 0.01 PF | ||
| Source | Scope | AC 220V 50/60Hz or AC/DC 85~265V | |
| Consumption | <5VA | ||
| Safety | Withstand Voltage | Input and Source | >2kV 50Hz / 1min |
| Input and Output | >1kV 50Hz / 1min | ||
| Output and Source | >2kV 50Hz / 1min | ||
| Insulating Resistance | Any two of input, output, source, casing >20MΩ | ||
| Environment | Temperature | Operation: -10°C to 50°C | |
| Storage: -25°C to 70°C | |||
| Humidity | <85%RH, free of wet and corrosive gas | ||
| Elevation | ≤3000m | ||