Megger BAKER MTR105 Static Motor Tester with Insulation Resistance, DLRO, and Phase Rotation

Megger BAKER MTR105 Static Motor Tester

The Megger BAKER MTR105 is a comprehensive static motor tester that brings together a suite of essential tests for motor maintenance and troubleshooting. Building on Megger’s trusted insulation resistance testing technology, the MTR105 adds DLRO four-wire Kelvin low resistance measurement, inductance and capacitance testing, and motor direction of rotation detection. This all-in-one handheld instrument is designed for industrial environments, offering robust construction with an IP54 weatherproof rating and a full-color graphic display for clear results.

Key Features & Highlights

• Insulation Resistance Testing: Range from 100 Ω to 200 GΩ with support for PI, DAR, timed, and temperature-compensated tests. Stabilized test voltage from 10 V to 999 V with accuracy of -0% +2% ±2 V.
• DLRO Four-Wire Kelvin Low Resistance: Automatic range from 1 mΩ to 10 Ω with 200 mA test current, bi-directional testing, and lead resistance compensation.
• Continuity Testing: Single automatic range from 0.01 Ω to 1.0 MΩ with selectable test currents up to 200 mA and adjustable buzzer limits.
• Motor Direction of Rotation: Determines phase sequence and rotation direction for three-phase motors.
• LCR Meter: Measures inductance, capacitance, and resistance with selectable test frequencies of 120 Hz or 1000 Hz.
• Voltmeter: True RMS AC/DC voltage measurement up to 1000 V with phase rotation indication.
• Temperature Measurement: Built-in thermocouple input for temperature compensation of insulation resistance readings.
• Safety: Live circuit detection and test inhibit, CAT III 600 V rating, and meets IEC 61010 and IEC 61557 standards.
• Rugged Design: Over-moulded case with IP54 protection for harsh industrial environments.

Applications

The MTR105 is ideal for production testing of new motors and generators, testing repaired or refurbished units, and monitoring in-service motors offline. Typical industries include utilities (power generation, water, oil/gas), industrial maintenance teams, HVAC field engineers, OEM motor/generator manufacturers, motor repair workshops, and transport sectors (rail, electric vehicles, marine).