MEGGER MTR105 Motor tester for insulation low resistance capacity inductance rotating machine testing
Code: MTR105 1010-361
Description
MTR105
Rotating machine tester
From insulation tests to directional rotation checks, the MTR105 is an all-in-one solution for your motor testing needs.
Carry out a complete motor assessment
Prevent costly failures
Work in any environment
Streamline your workflow
Ensure safe operation
About the product
The MTR105 is a dedicated rotating machine tester that brings Megger’s proven insulation resistance (IR) expertise together with advanced low resistance, capacitance, inductance, and rotation testing in one handheld instrument. It delivers a holistic view of motor health, enabling you to assess windings, connections, and overall condition with precision and confidence. Designed for production, service, and maintenance teams, the MTR105 supports fast, reliable decisions across your asset lifecycle.
Comprehensive testing capabilities
Built on a unified test architecture, the MTR105 consolidates multiple core measurements:
Insulation resistance with PI, DAR, timed tests, and temperature compensation for consistent, comparable results.
DLRO four‑wire Kelvin low resistance testing for accurate measurement of joints, connections, and windings.
Inductance and capacitance to characterise coils and diagnose imbalance or deterioration.
Motor direction of rotation and three‑phase supply rotation to verify correct installation before energisation.
This integrated approach reduces set‑up time, cuts the number of tools you carry, and streamlines workflows in the field or workshop.
Accuracy you can trust
Stable test voltages and four‑wire measurement techniques underpin consistent, repeatable readings. Temperature measurement and compensation keep IR results aligned to reference conditions, so trends are meaningful across seasons and sites. Clear, full‑colour graphics present values and trends at a glance, allowing you to validate pass/fail criteria and move decisively to the next task.
Safety engineered into every test
The MTR105 is designed to protect both operator and instrument. Fast live‑voltage detection inhibits tests if hazardous voltage is present, reducing the risk of damage when connected to energised circuits or across phases. User‑selectable test terminal lockout thresholds add another layer of control, while robust internal protection supports safe use in CAT III 600 V environments.
Robust by design, ready for the field
A tough, over‑moulded housing and IP54 environmental protection defend against dust, moisture, and daily knocks. Detachable, interchangeable leads adapt to different applications and maintain reliable connections. With onboard storage for up to 256 motors and simple USB download, you can capture, share, and analyse results as part of a connected maintenance ecosystem.
Confident, efficient decision‑making
By unifying essential motor tests in a single instrument, the MTR105 helps you shorten diagnostics, standardise procedures, and improve asset reliability. Whether you are commissioning new equipment, verifying repairs, or conducting routine maintenance, the MTR105 provides the clarity, safety, and durability you need to work with confidence.
Video presetnation on Youtube of MEGGER MTR105
Standard accessories
Description Part number
MTR105 Rotating Machine Tester 1010-361
Included accessories:
Hook strap assembly
Soft pouch
Temperature probe, T type CAT III 600 V
IR lead set (comprising of):
3 x Grabber Clips (Red, Black and Blue)
CAT III 1000 V, CAT IV 600 V
3 x 4 mm Test leads, 2 m, 1 end Right Angle
1 end straight (red, black and blue)
CAT III 1000 V, CAT IV 600 V
3 x Test probes (red, black and blue), long reach (100 mm),
CAT III 1000 V, CAT IV 600 V
Kelvin clip lead set CAT III 600 V (comprising of):
2 x Kelvin Clip leads, 2 meters, 4 mm Right Angled Connectors
• Small, rugged, lightweight and powerful • Operate with or without a computer • Intuitive manual operation with Smart Touch View Interface • High current, high power (60 Amps/300 VA rms) per phase • Network interface provides IEC 61850 test capabilities • Fully automated testing using AVTS Software
• 2 and 3 point testing • ART (Attached Rod Technique) testing capability with DET3TC • Choice of digital or analog display • Warning indicators prevent test failure • IP54 rated • Complete with leads, stakes and rugged carry case • Simple one button operation • Calibration test certificate included
• Test voltages : 60 kV, 80 kV and 100 kV • Laboratory instruments for measuring insulating oil breakdown voltage • Lock in precision - oil vessel with lockable adjustment • Bright 3.5" colour display • Suitable for mineral, ester and silicon oils • Trip detection circuit with direct measurement of voltage and current • Ultra fast (< 10 µs) HV switch off time
• Ground faults in ungrounded dc battery systems easily located • Operates in high electrical noise environment • Simplifies fault tracing by identifying fault characteristic (resistive and capacitive) magnitudes
• CAT IV 600 V for safe operation
• Light, 100 A, battery powered unit for portability
• High noise immunity for stable readings
• Smooth DC output for circuit breaker testing
