I. Basic Overview
Model: ME437
Product Type: Multifunctional Energy Meter
Application Areas: Power quality analysis, electricity billing
Power Supply: 85~265V AC/DC
Installation Method: Panel mounting
Sampling Rate: 8kbps
Harmonic Capability: Can display 5 harmonics simultaneously, supports up to 31st harmonic
Screen Configuration: 3.5-inch TFT display, resolution 320×480 pixels
Physical Parameters: Weight 350g; Dimensions 96×96×99mm; Casing Color White

II. Wiring and Input Specifications
1. Supported Wiring Types
Three-phase four-wire (3PH4W)
Three-phase three-wire (3PH3W)
One-phase two-wire (with neutral line 1PH2W (L-N), without neutral line 1PH2W (L-L))
One-phase three-wire (1PH3W (L-L-N))
2. Current Input Mode
External CT (supported only) 333mV Output)
External Rogowski Coil (Compatible with all TRC/NRC/Y-FCT series)
3. Rated Current Ranges & Recommended Rogowski Coils
Table: Range Current Range Recommended Coil Model & Sensitivity
Range 1 100A (0.5A~120A) TRC-24, 50mV/kA
Range 2 600A (0.5A~720A) TRC-36, 50mV/kA
Range 3 1000A (1A~1200A) NRC-100, 85mV/kA
Range 4 3000A (3A~3600A) NRC-150, 85mV/kA
Range 5 6000A (6A~7200A) NRC-200, 50mV/kA
4. Input Electrical Parameters
Primary Current Range: 0.1A~9999A (Adjustable)
Current Input Range: 1/2²⁵mV ~ 333mV
Input Overload Capacity: 600mV, 10s/hours
Rogowski Coil Adaptor Sensitivity: 50mV/kA, 85mV/kA (@50Hz, tolerance ±0.5%)
Measurement Voltage Range: 80~400V AC
Frequency Range: 50/60Hz

III. Measurement Accuracy
Table: Measurement Item Accuracy Index
Voltage 0.2 class (80V-400V)
Power Factor ±0.005 (10%-120%)
Active Power/Apparent Power IEC62053-22 Class 0.5
Reactive Power IEC62053-21 Class 2
Frequency 0.01% (45-65Hz)
Active Energy IEC62053-22 Class 0.5s
Reactive Energy IEC62053-21 Class 2

IV. Environmental and Safety Parameters
1. Environmental Conditions
Operating Temperature: -25℃ ~ +55℃
Storage Temperature: -40℃ ~ +85℃
Humidity: 5~95% RH (50℃, non-condensing)
Altitude: Maximum 3000m
Pollution Degree: 2
Insulation Category: Class III (suitable for power distribution systems 277/480VAC)
Protection Level: IP20 (compliant with IEC 60629)
2. EMC Immunity Level
Electrostatic Discharge: Level IV (IEC61000-4-2)
Radiated Field Immunity: Level III (IEC61000-4-3)
Fast Transient Immunity: Level IV (IEC61000-4-4)
Current Immunity: Level IV (IEC61000-4-5)
Conduction conductivity: Level III (IEC61000-4-6)
Power frequency magnetic field immunity: 0.5mT (IEC61000-4-8)
Conducted/radiated emission: Class B (EN55022) 1