KM-8500-200P 200A Contact Resistance Meter (Micro-Ohmmeter)

The KM-8500-200 200A Contact Resistance Meter is a high-current micro-ohmmeter designed for accurate measurement of extremely low contact resistance in circuit breakers, busbars, isolators, joints, and high-current connections. Using a stable 200A constant current output, this instrument ensures reliable results even in oxidized or high-resistance contacts.

Why Use a 200A Contact Resistance Meter?

Low-resistance measurements require high current to eliminate surface oxidation and contact film resistance. A 200A Contact Resistance Meter (CRM) provides more stable and repeatable readings than 50A or 100A testers, making it essential for HT & LT switchgear maintenance, transformer yards, and substation testing.

Key Features of KM-8500-200

• High current output selectable from 30A to 200A
• Extremely low resistance measurement down to 0.1 µΩ resolution
• Fast test time – results in 10 to 60 seconds
• Large, easy-to-read digital display
• Built-in printer for instant field test reports
• Compact and rugged design for site testing

Technical Specifications

Typical Applications

• Circuit Breaker Contact Resistance Testing
• Busbar joint and connection testing
• Isolators and disconnect switches
• Grounding and bonding resistance checks
• Welding joints and fuse connections
• High-current cable joints

Where 200A CRM Is Mandatory

Many utilities and EPC contractors specify a 200A micro-ohmmeter for:

• 132kV / 220kV / 400kV substations
• GIS and AIS circuit breakers
• Transformer feeder breaker maintenance
• Preventive maintenance audits

Why Buy KM-8500-200 from IndiaMeters?

• 100% genuine Kusam-Meco equipment
• Technical support for testing & applications
• Fast dispatch across India
• GST invoice & calibration support

Frequently Asked Questions (FAQ)

What is a Contact Resistance Meter used for?

A Contact Resistance Meter measures very low resistance (micro-ohms) in electrical contacts to detect overheating, loose joints, corrosion, or wear in high-current equipment.

Why is 200A current required for contact resistance testing?

Higher current removes surface oxidation and ensures accurate measurement of true contact resistance, especially in circuit breakers and busbars.

Is KM-8500-200 suitable for circuit breaker testing?

Yes, it is specifically designed for testing circuit breaker contacts, joints, and connections in substations and industrial panels.

Does this meter have a built-in printer?

Yes, the KM-8500-200 includes an integrated thermal printer for instant field reports.