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MT-3551T Power Meter Tester

The MT-3551T Power Meter Tester is a multifunctional, portable field testing device for single-phase and three-phase power meters and metering units. It is widely used by power utilities, substations, telecom facilities, and industrial sites for:

  • Power consumption examination

  • Circuit breakage inspection

  • Power abnormality analysis

  • Asset management and verification testing

It combines a meter test unit with power quality analyzer functions, supporting direct and clamp-based current inputs, harmonic analysis, and online monitoring.

Key Features

  • Portable, lightweight design with TFT LCD touch-screen interface

  • Single-phase and three-phase testing in one unit

  • Combination of electricity meter tester + power quality analyzer

  • Online monitoring for real-time data and comparison

  • Voltage range up to 700Vrms and current up to 1000A (via clamps)

  • Harmonic measurement: 1st–50th order + THD

  • Wire connection verification for meter installation checks

  • Built-in memory with PC connectivity for data transfer and report printing

  • Safe, quick measurement for electricity anti-theft investigations

Technical Specifications

Voltage Signal Input

  • Type: Direct input

  • Testing Range: 10–700 Vrms

  • Peak Voltage: 1000 V

  • Resistance: >2 MΩ, 20 pF

  • Power Consumption: <0.5 VA/phase

Current Input Circuit

  • Type: Indirect input (current clamps)

  • Testing Range: 20 Arms, 500 Arms, 1000 Arms

  • Power Consumption: <2.0 VA/phase

Frequency Range

  • 40 Hz – 70 Hz

  • Accuracy: ±0.01 Hz

Measurement Accuracy

  • Voltage: ±0.3%

  • Current: ±0.3%

  • Frequency: ±0.01 Hz

  • Phase: ±0.5°

  • Active Power: ±0.5%

  • Reactive Power: ±1.0%

  • Active Energy: ±0.5%

  • Reactive Energy: ±1.0%

  • Power Factor: ±0.005

Harmonics

  • Voltage harmonics: 1st–50th

  • Current harmonics: 1st–50th

  • Harmonic Accuracy: Voltage ±0.2% (≤5th), ±0.5% (>5th); Current ±0.2% (≤5th), ±0.5% (>5th)

  • THD (Total Harmonic Distortion)

Screen & Memory

  • 3.5” TFT LCD touch screen, 640×480 resolution

  • Internal Memory: 16 MB Flash

  • External Memory: 4 GB

  • USB Interface for data transfer

CT Ratio

  • Supports CT ratio and phase deviation testing

Online Monitoring

  • Active/Reactive energy, harmonic active/reactive power

  • Power factor monitoring under load

  • Fundamental + full harmonic loads

Power Supply

  • Rechargeable Li-ion battery

  • Working Time: 5–6 hours

  • Adapter: AC100–240V / DC16.8V–1A

Physical Parameters

  • Dimensions: 277 × 169 × 36 mm

  • Weight: 0.7 kg

Environmental Conditions

  • Operating Temp: -20°C to +40°C

  • Relative Humidity: 5–90% RH

  • Insulation: >2 MΩ, AC1500V/50Hz, 1 min

Application

  • Calibration and verification of single/three-phase power meters

  • Energy auditing in utilities and industries

  • Power quality and harmonic analysis

  • CT ratio and phase deviation testing

  • Quick diagnostics for wiring errors and electricity theft detection

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