Megger MOM690A Micro-ohmmeter Repair

$245.00

🛡️ 90-Day Warranty ✓ Fee Credited to Repair ⚡ No Forms Needed

Professional Megger MOM690A repair by certified technicians. Common issues include voltage sense amplifier degradation and Kelvin probe connector wear.

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📋 How It Works

Submit Request – Pay evaluation fee & provide equipment details
Ship to Us – Send your equipment to our Oregon facility
We Evaluate – Detailed diagnosis & repair estimate
Fee Credited – Your evaluation fee applies to repair cost
We Repair – Professional repair with 90-day warranty

🔧 Fast Turnaround: Most repairs are completed within 1–3 business days.
📏 Precision Calibration: NIST-traceable calibrations included for most repairs.
🛡️ Warranty: 90-day warranty on all repairs.
📝 Transparency: Detailed evaluation and repair estimate before work begins.

✓ Evaluation Fee Credited Toward Repair

This evaluation fee is applied as credit toward your final repair cost. After we evaluate your equipment, you'll receive a detailed estimate before any repair work begins.

Description
Brand

Description

Megger MOM690A Micro-ohmmeter Repair

The Megger MOM690A is a high-current micro-ohmmeter — it passes a large test current (to ~690 A) through a connection and measures micro-ohm-level resistance to verify breaker contacts, joints, and bus bars in substations using a 4-wire (Kelvin) connection. Its character is high-current sourcing plus precision low-resistance measurement, so faults concentrate in the current source, the sense/measurement front-end, and the Kelvin connections.

June Company repairs and calibrates the Megger MOM690A for substation, breaker, and switchgear maintenance crews.

Common Megger MOM690A problems we fix

Voltage-sense amplifier degradation — the sense amplifier drifting so micro-ohm readings are off, repaired and recalibrated.
Kelvin-probe / connector wear — worn 4-wire probe connectors causing erratic readings, serviced.
Won’t reach test current — the high-current source failing to deliver rated amps, repaired.
Thermal-shutdown faults — overheating during high-current tests, corrected.
Display or interface faults.

FAQs

My MOM690A readings drift or the probes are worn — fixable? Yes. Sense-amplifier and Kelvin-probe faults are repairable, then recalibrated so micro-ohm readings are accurate at test current, with a NIST-traceable certificate.

Is the test current verified? Yes — current and resistance accuracy are checked against our standards.

Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or submit a service request.

Brand

Megger Repair

Megger Group Limited is a company known for manufacturing electrical test equipment and measuring instruments. They provide a wide range of products designed for testing, diagnosing, and maintaining electrical assets and systems. Some of their key products and their functionalities include:

Insulation Resistance Testers: Used to measure the insulation resistance of electrical equipment and components to ensure they can safely withstand normal operating voltages.
Low Resistance Ohmmeters: Instruments designed to measure very low resistances in electrical connections, cables, and conductors, helping to identify and troubleshoot high-resistance joints or faults.
Transformer Test Equipment: Includes testers for assessing the condition of transformers through various tests such as turns ratio, winding resistance, insulation resistance, and transformer oil testing.
Cable Fault Locators: Devices used to locate faults and defects in underground cables, helping to pinpoint the exact location of faults without the need for extensive excavation.
Ground Resistance Testers: Instruments used to measure the resistance of grounding systems to ensure electrical safety and compliance with standards.
Power Quality Analyzers: Instruments that monitor and analyze various aspects of electrical power quality, including voltage fluctuations, harmonics, power factor, and waveform distortions.
Portable Appliance Testers (PAT Testers): Used for testing the electrical safety of portable appliances and equipment to ensure they comply with safety regulations and standards.
Circuit Breaker Analyzers: Devices designed to test and analyze the performance of circuit breakers, including timing, operation sequence, and contact resistance.

Megger products cater to a wide range of industries including power generation, transmission, distribution, telecommunications, manufacturing, and electrical contracting. They are essential tools for electrical engineers, technicians, and maintenance professionals to ensure the reliability, safety, and efficiency of electrical systems and equipment.