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Megger 1008-022 Insulation Tester HV Test Lead Set, For Use With Insulation Resistance Testers

Megger 1008-022 Insulation Tester HV Test Lead Set, For Use With Insulation Resistance Testers

RS Stock No. 189-1912

Brand Megger

  • Accessory Type: Lead Set
  • Category: Insulation Tester Accessories
  • For Use With: Insulation Resistance Testers

AED 766.07

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Megger 1012-063 Insulation Tester Case, For Use With MTR105 Rotating Machine Tester

Megger 1012-063 Insulation Tester Case, For Use With MTR105 Rotating Machine Tester

RS Stock No. 193-8411

Brand Megger

  • Accessory Type: Soft Pouch
  • Category: Insulation Tester Accessories
  • For Use With: MTR105 Rotating Machine Tester

AED 397.18

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Megger 1011-929 Insulation Tester Probe, For Use With MTR105 Rotating Machine Tester

Megger 1011-929 Insulation Tester Probe, For Use With MTR105 Rotating Machine Tester

RS Stock No. 193-8412

Brand Megger

  • Accessory Type: Probe Leadset
  • Category: Insulation Tester Accessories
  • For Use With: MTR105 Rotating Machine Tester

AED 376.94

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Megger 1012-064 Insulation Tester Pin, For Use With MTR105 Rotating Machine Tester

Megger 1012-064 Insulation Tester Pin, For Use With MTR105 Rotating Machine Tester

RS Stock No. 193-8413

Brand Megger

  • Accessory Type: Probe Pins
  • Category: Insulation Tester Accessories
  • For Use With: MTR105 Rotating Machine Tester

AED 42.56

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Megger 1011-928 Insulation Tester Crocodile Clip, For Use With MTR105 Rotating Machine Tester

Megger 1011-928 Insulation Tester Crocodile Clip, For Use With MTR105 Rotating Machine Tester

RS Stock No. 193-8414

Brand Megger

  • Accessory Type: Clip Leadset
  • Category: Insulation Tester Accessories
  • For Use With: MTR105 Rotating Machine Tester

AED 346.52

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Megger 1012-069 Insulation Tester Crocodile Clip, For Use With MTR105 Rotating Machine Tester

Megger 1012-069 Insulation Tester Crocodile Clip, For Use With MTR105 Rotating Machine Tester

RS Stock No. 193-8415

Brand Megger

  • Accessory Type: Grabber Clip
  • Category: Insulation Tester Accessories
  • For Use With: MTR105 Rotating Machine Tester

AED 304.01

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Megger 1012-066 Insulation Tester Probe, For Use With MTR105 Rotating Machine Tester

Megger 1012-066 Insulation Tester Probe, For Use With MTR105 Rotating Machine Tester

RS Stock No. 193-8416

Brand Megger

  • Accessory Type: Test Probe Set
  • Category: Insulation Tester Accessories
  • For Use With: MTR105 Rotating Machine Tester

AED 91.23

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Megger 1012-065 Insulation Tester Probe, For Use With MTR105 Rotating Machine Tester

Megger 1012-065 Insulation Tester Probe, For Use With MTR105 Rotating Machine Tester

RS Stock No. 193-8418

Brand Megger

  • Accessory Type: Test Probe Set
  • Category: Insulation Tester Accessories
  • For Use With: MTR105 Rotating Machine Tester

AED 91.23

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Megger 1002-643 Insulation Tester HV Test Lead Set, For Use With MIT510/2

Megger 1002-643 Insulation Tester HV Test Lead Set, For Use With MIT510/2

RS Stock No. 763-9273

Brand Megger

  • Accessory Type: HV Test Lead Set
  • Category: Insulation Tester Accessories
  • For Use With: MIT510/2

AED 1.337.55

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Megger 1007-157 Insulation Tester Probe, For Use With MIT480

Megger 1007-157 Insulation Tester Probe, For Use With MIT480

RS Stock No. 611-1308

Brand Megger

  • Accessory Type: Probe
  • Category: Insulation Tester Accessories
  • For Use With: MIT480

AED 486.37

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Megger 1007-156 Insulation Tester Probe, For Use With MIT320 Series, MIT330 Series

Megger 1007-156 Insulation Tester Probe, For Use With MIT320 Series, MIT330 Series

RS Stock No. 851-3406

Brand Megger

  • Accessory Type: Switch Probe
  • Category: Insulation Tester Accessories
  • For Use With: MIT320 Series, MIT330 Series

AED 510.68

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Megger 1012-068 Hook Strap, For Use With MTR105 Rotating Machine Tester

Megger 1012-068 Hook Strap, For Use With MTR105 Rotating Machine Tester

RS Stock No. 193-8410

Brand Megger

  • Accessory Type: Hook Strap
  • Category: Insulation Tester Accessories
  • For Use With: MTR105 Rotating Machine Tester

AED 54.74

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Megger 1002-648 Insulation Tester HV Test Lead Set, For Use With MIT510/2

Megger 1002-648 Insulation Tester HV Test Lead Set, For Use With MIT510/2

RS Stock No. 763-9270

Brand Megger

  • Accessory Type: HV Test Lead Set
  • Category: Insulation Tester Accessories
  • For Use With: MIT510/2

AED 1.945.58

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Megger 1002-647 Insulation Tester HV Test Lead Set, For Use With MIT510/2

Megger 1002-647 Insulation Tester HV Test Lead Set, For Use With MIT510/2

RS Stock No. 763-9276

Brand Megger

  • Accessory Type: HV Test Lead Set
  • Category: Insulation Tester Accessories
  • For Use With: MIT510/2

AED 1.398.36

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Megger MIT230HD Insulation & Continuity Tester, 250V Min, 1000V Max, 1000MΩ Max, CAT III 600V

Megger MIT230HD Insulation & Continuity Tester, 250V Min, 1000V Max, 1000MΩ Max, CAT III 600V

RS Stock No. 265-5914

Brand Megger

  • Maximum Operating Temperature: +55°C
  • Minimum Test Voltage: 250V
  • Test Current: 1mA

AED 3.526.29

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Megger MIT525 Insulation Tester, 250V Min, 5000V Max, 10TΩ Max, CAT IV

Megger MIT525 Insulation Tester, 250V Min, 5000V Max, 10TΩ Max, CAT IV

RS Stock No. 763-9260

Brand Megger

  • Battery Type: Lithium-Ion
  • Plug Type: Type C - European Plug, Type G - British 3-pin
  • Tester Type: Insulation Tester

AED 21.492.25

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Megger MIT1525 Insulation Tester, 1000V Min, 15000V Max, 30TΩ Max, CAT IV

Megger MIT1525 Insulation Tester, 1000V Min, 15000V Max, 30TΩ Max, CAT IV

RS Stock No. 189-1913

Brand Megger

  • Power Source: Battery, Mains
  • Safety Category: CAT IV 1000V
  • Tester Type: Insulation Tester

AED 31.767.21

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Megger MIT1025 Insulation Tester, 500V Min, 10000V Max, 20TΩ Max, CAT IV

Megger MIT1025 Insulation Tester, 500V Min, 10000V Max, 20TΩ Max, CAT IV

RS Stock No. 763-9264

Brand Megger

  • Power Source: Battery, Mains
  • Safety Category: CAT IV 600V
  • Tester Type: Insulation Tester

AED 27.997.66

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Megger MIT515 Insulation Tester, 250V Min, 5000V Max, 10TΩ Max, CAT IV

Megger MIT515 Insulation Tester, 250V Min, 5000V Max, 10TΩ Max, CAT IV

RS Stock No. 763-9267

Brand Megger

  • Minimum Operating Temperature: -20°C
  • Power Source: Battery, Mains
  • Safety Category Level: CAT IV

AED 18.622.60

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Megger EVT100 Electrical Vehicle Tester, 50 V, 100 V, 250 V, 500 V, 1000 V No With USB

Megger EVT100 Electrical Vehicle Tester, 50 V, 100 V, 250 V, 500 V, 1000 V No With USB

RS Stock No. 066-5485

Brand Megger

  • Insulation Test Voltage: 50 V, 100 V, 250 V, 500 V, 1000 V
  • Interface Type: USB
  • Section: Test & Measurement

AED 12.155.06

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Megger MFT-X1-BS Multifunction Tester, 50V dc, Earth Resistance Measurement

Megger MFT-X1-BS Multifunction Tester, 50V dc, Earth Resistance Measurement

RS Stock No. 265-5884

Brand Megger

  • Continuity Test Current: 10mA
  • Loop Impedance Test Type: High/Low Current
  • Non-Tripping: Yes

AED 13.922.87

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Megger MFT-X1-SC Multifunction Tester, 50V dc, Earth Resistance Measurement

Megger MFT-X1-SC Multifunction Tester, 50V dc, Earth Resistance Measurement

RS Stock No. 265-5885

Brand Megger

  • Insulation Test Voltage: 50 V dc, 100 V dc, 250 V dc, 500 V dc, 1000V dc
  • Maximum Continuity Resistance: 999kΩ
  • Non-Tripping: Yes

AED 13.922.87

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Megger MFT-X1-AU Multifunction Tester, 50V dc, Earth Resistance Measurement

Megger MFT-X1-AU Multifunction Tester, 50V dc, Earth Resistance Measurement

RS Stock No. 265-5887

Brand Megger

  • Category: Multifunction Testers
  • Continuity Range: 0.01 → 999 k Ω
  • Power Source: Battery

AED 13.922.87

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Megger MFT-X1-CH Multifunction Tester, 50V dc, Earth Resistance Measurement

Megger MFT-X1-CH Multifunction Tester, 50V dc, Earth Resistance Measurement

RS Stock No. 265-5886

Brand Megger

  • Category: Multifunction Testers
  • Earth Resistance Measurement: Yes
  • RCD Ramp Test: Yes

AED 13.922.87

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What is a Megger Insulation Tester?
A Megger insulation tester is a precision instrument used to measure the electrical resistance of insulation in cables, windings, motors, transformers, and electrical installations. It applies a high DC voltage to the device under test and measures how well the insulation resists current leakage. This helps identify deteriorated or compromised insulation before faults occur. In addition to insulation resistance testing, many Megger models perform dielectric withstand tests (HIPOT tests) at controlled voltages to verify insulation integrity under high voltage stress. For professionals, a Megger insulation tester is an essential tool for preventive maintenance, safety compliance, and quality assurance across electrical, industrial, and building environments.

What is a Megger insulation tester used for?
Megger insulation testers are used across electrical maintenance, construction, and industrial settings to verify insulation integrity. Common applications include:
  • Testing insulation resistance of cables, motors, transformers, generators, and switchgear
  • Performing dielectric withstand (HIPOT) tests to confirm insulation can withstand voltage spikes
  • Assessing insulation aging and moisture intrusion in windings, insulation boards, and cable glands
  • Quality control during installation and commissioning of electrical systems
  • Preventive maintenance programs to comply with safety standards and regulatory requirements
  • Field surveys for HV equipment in manufacturing plants, utility substations, and building services
Megger insulation testers also serve training and troubleshooting roles, helping technicians distinguish between insulation defects, moisture, or connector corrosion. When paired with appropriate test leads and accessories, they provide reliable data for diagnosing insulation health.

How do I choose the right Megger insulation tester for my needs?
Choosing the right Megger insulation tester depends on voltage requirements, portability, features, and the type of equipment you service. Consider:
  • select a model that supports the maximum insulation test voltage you encounter (common ranges include 50 V, 125 V, 250 V, 500 V, 1000 V, and higher for industrial gear). Higher voltages are required for HV cables, transformers, and large motors.
  • ensure the device can measure in the expected ranges (e.g., kilo-ohms to giga-ohms) with accuracy appropriate for your assets.
  • a clear LCD or color display, plus configurable memory, PASS/FAIL indications, and date/time stamps help with record-keeping and reporting.
  • look for CAT safety ratings, IEC/EN compliance, and automatic discharge features to protect personnel and equipment.
  • handheld models are ideal for fieldwork; bench or portable units suit workshops and laboratories.
  • compatible test leads, remote probes, adapters for cables and windings, and calibration services extend the tester’s usefulness.
  • some Megger testers combine insulation resistance with continuity checks, capacitance measurement, and earth resistance testing for a broader diagnostic toolkit.
By aligning these factors with your typical tasks—cable testing, motor winding checks, transformer insulation, or substation maintenance—you’ll choose a Megger insulation tester that delivers reliable data, reduces downtime, and simplifies reporting.

How do you perform an insulation resistance test with a Megger?
Performing an insulation resistance test with a Megger follows a careful, safety-conscious procedure. General steps include:
  • Plan the test: identify the equipment under test, disconnect any live circuits, and verify the test environment is safe.
  • Choose the appropriate test voltage: select the voltage level recommended for the asset (common values are 250 V, 500 V, or 1000 V for many industrial components).
  • Connect test leads properly: attach the test lead positive to the conductor or insulation surface and the test lead negative to the reference point or earth as instructed by the device and the asset’s documentation.
  • Discharge and read: press the test button to apply voltage and monitor the insulation resistance reading. Remember to keep leads stable and avoid touching any live conductors.
  • Interpret results: higher resistance indicates better insulation; lower values suggest insulation degradation, moisture intrusion, or contamination. Compare results against equipment manuals or established acceptance criteria.
  • Document and record: save readings with date, asset ID, test voltage, environmental conditions, and operator notes for traceability.
Safety reminders: never test energized equipment, use PPE appropriate for the voltage, and follow your facility’s lockout/tagout procedures. If you observe readings that fall outside acceptance criteria, isolate the asset and plan maintenance or replacement.

What maintenance and care do Megger insulation testers require?
Proper care extends the life and accuracy of Megger insulation testers. Key maintenance practices include:
  • Regular calibration: schedule calibration through authorized Megger service to maintain accuracy across measurement ranges.
  • Battery health: check battery status, replace or recharge as recommended, and store the tester with the battery removed if required by the model.
  • Fuse and test lead inspection: inspect fuses, leads, and probes for wear, cracking, or damage; replace faulty components before testing.
  • Clean storage: keep the instrument in a protective case, away from moisture, dust, and extreme temperatures.
  • Software updates: apply firmware or software updates if the model supports them to improve stability and features.
  • Zeroing and self-checks: perform any built-in self-tests or zeroing procedures per the user manual to ensure baseline accuracy.
Regular maintenance minimizes drift, improves safety, and ensures reliability during critical electrical tests in field and lab environments.

What accessories and related products should I consider with Megger insulation testers?
A comprehensive insulation testing setup often includes compatible accessories and related equipment:
  • high-voltage rated leads, detachable probes, and remote measurement devices for hard-to-reach connections.
  • spool adapters, banana plug adapters, and direct-connect interfaces for cables, windings, and busbars.
  • rugged cases that protect the instrument in field service and transport.
  • official Megger calibration services to maintain traceable accuracy.
  • devices or modules that log measurements over time for trend analysis and maintenance reporting.
  • PPE such as insulated gloves, eye protection, and arc-flash awareness tools for high-voltage testing environments.
These add-ons help you tailor a Megger insulation tester to industrial environments, fleet maintenance, or lab quality assurance programs.

How should I interpret insulation resistance results from a Megger insulation tester?
Interpreting insulation resistance results requires contextual understanding of the asset, voltage level, and environmental conditions. Practical guidance includes:
  • Higher resistance is generally better; very low readings indicate compromised insulation, moisture, or contamination.
  • Compare against manufacturer specifications, industry standards, or historical baselines for the same asset.
  • Consider the time-dependent leakage behavior: some tests provide insulation resistance versus time data to identify creeping currents or moisture migration.
  • Differentiate between insulation resistance and leakage current: a good resistance value does not always imply perfect insulation if there are measurement artifacts.
  • For high-voltage equipment, consult IEC or local standards to determine acceptable ranges for the tested voltage and equipment class.
Record the test conditions (voltage, temperature, humidity, test duration) to enable accurate trend analysis over the equipment’s life cycle.

What are the common Megger model families and how do they differ?
Megger offers a range of insulation testers designed for different environments and users:
  • compact, portable, and quick to deploy for field service and maintenance rounds. They cover mid-range voltage options and often include memory and straightforward pass/fail indicators.
  • larger displays, higher accuracy, and extended test capabilities suitable for laboratories or production floors where repeatable testing is essential.
  • specialized units capable of delivering kilovolt-level test voltages for HV cables, transformers, and substations, often with advanced safety features and data logging.
  • models that integrate insulation resistance, continuity, capacitance, and earth resistance measurements in one instrument for a broader diagnostic tool.
When selecting a model, match the voltage rating, measurement range, data capture, and durability to your application—from field service to industrial maintenance and factory QA.

Where can I find reliable Megger insulation tester training and support?
Megger provides official product documentation, training modules, and customer support to help technicians maximize the value of insulation testers. Helpful resources include:
  • Product manuals with wiring diagrams, test procedures, and safety guidelines
  • Commissioning and maintenance checklists for field technicians
  • Calibration and service information from authorized Megger centers
  • Technical webinars, application notes, and troubleshooting guides
  • Online forums and community discussions where professionals share best practices
For critical installations, rely on accredited service providers and verify traceable calibration to ensure compliance with industry standards and quality management systems.

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