top of page

MTS-50 Meter Test System

The MTS-50 Meter Test System is a three-phase calibration system designed for the testing and verification of single-phase and three-phase electronic/inductive active and reactive energy meters.

Equipped with a reference meter (Class 0.05 or 0.1) and a precision power source up to 60A, it provides high accuracy and modular functionality for utilities, calibration labs, and manufacturers. Compact and lighter than the MTS-100, it offers the same robust testing capabilities with a lower current output range.

Model Options

Key Features

  • Accuracy class 0.05% or 0.1% for reliable calibration

  • Supports single and three-phase meters (electronic and inductive)

  • 8” TFT display with intuitive operation

  • Automatic/manual testing of basic error, creeping, starting, deviation

  • Harmonic output up to 63rd order

  • Compatible with DLT-645 communication protocol

  • Online self-protection and diagnostics for overloads or faults

  • Flexible control: stand-alone, PC, or remote (RS232, Ethernet, WiFi, RS485)

  • Compact and portable (25 kg) for field or lab use

Technical Specifications

AC Voltage Output

  • Range: 100V, 220V, 380V, 660V

  • Adjusting Range: 0–120% RG

  • Resolution: 0.01%RG, 0.1%RG, 1%RG, or 10%RG

  • Stability: 0.01%/2min (Class 0.05), 0.02%/2min (Class 0.1)

  • Distortion: ≤0.2% (Non-capacitive load)

  • Max Load: 20 VA/phase

  • Accuracy: Class 0.05% or 0.1%

AC Current Output

  • Range: 0.05A, 0.2A, 1A, 5A, 16.67A, 50A

  • Adjusting Range: 0–120% RG

  • Resolution: 0.01%RG, 0.1%RG, 1%RG, or 10%RG

  • Stability: 0.01%/2min (Class 0.05), 0.02%/2min (Class 0.1)

  • Distortion: ≤0.2% (Non-capacitive load)

  • Max Load: 50 VA (50A range)

  • Accuracy: Class 0.05% or 0.1%

Power Output

  • Stability: 0.01%/2min (Class 0.05), 0.02%/2min (Class 0.1)

Phase Output

  • Range: 0°–360°

  • Resolution: 0.01° (steps of 10°, 1°, 0.1°, or 0.01°)

  • Accuracy: ±0.05°

Power Factor Output

  • Range: -1 to +1

  • Resolution: 0.0001

  • Accuracy: 0.0005

Frequency Output

  • Range: 40Hz–70Hz

  • Resolution: 0.001Hz (steps of 1Hz, 0.1Hz, 0.01Hz, or 0.001Hz)

  • Accuracy: ±0.002Hz

Harmonic Setting

  • Order: 2nd–63rd

  • Amplitude: 0–40%

  • Angle: 0°–359.99°

  • Error: ≤±0.1% (2nd–31st), ≤±0.2% (32nd–63rd)

Energy Error Measurement

  • Active Energy Basic Error:

    • ±0.05% RD (V: 15–660V, I: 0.02–60A, PF ≥0.5)

    • ±0.1% RD (V: 15–660V, I: 0.01–0.02A, PF=1)

  • Reactive Energy Basic Error:

    • ±0.1% RD (V: 15–660V, I: 0.02–60A, PF ≥0.5)

    • ±0.2% RD (V: 15–660V, I: 0.01–0.02A, PF=1)

  • Input Pulse: 3 active, 3 reactive channels

Other Parameters

  • Power Supply: 90–265 VAC/DC, 50–60Hz

  • Power Consumption: 50–1000 VA

  • Operating Temp: 20–30°C, RH ≤85%

  • Storage Temp: -20–50°C

  • Dimensions: 600 × 440 × 176 mm

  • Weight: 25 kg

Main Functions

  • Calibrates single/three-phase energy meters (electronic & inductive)

  • Auto/manual testing of basic error, creeping, starting, deviation

  • Variable influence tests: voltage, frequency, harmonics, reverse sequence, unbalance

  • Special tests: phase triggering, pulse train triggering

  • Multifunction meter tests: demand indication, demand cycle, time slot switching, multi-tariff energy error

  • Equipped with OCXO for detecting daily error drift

  • Outputs 2nd–63rd harmonics

bottom of page