High Current Circuit Breaker Loop Resistance Tester 200A 400A 600A DC Micro-Ohmmeter for High Voltage Switchgear Contact Resistance Measurement

The High Current Circuit Breaker Loop Resistance Tester is designed for applications where higher test current is required for low-resistance measurement.

The instrument provides high-current DC output through the test object while measuring the resulting voltage drop with a precision measurement circuit.

Higher-current configurations can be selected according to the equipment type, applicable standards and customer's test requirements.

Some current commercial products offer 100A, 200A, 400A and 600A configurations, demonstrating the range of high-current options available in this product category.

• Circuit breaker contact resistance
• High-voltage switch resistance
• Switchgear contact resistance
• Busbar resistance
• Disconnector resistance
• Isolator resistance
• Low-resistance electrical connection testing
• High-current injection
• Micro-ohm measurement
• Test data recording

• High-current output
• Micro-ohm measurement capability
• High measurement repeatability
• Digital display
• Fast testing
• Automatic timing
• Data storage
• Field testing capability

Q: Why would a customer need 400A or 600A instead of 100A?
A: The appropriate current depends on the equipment, testing standard and test procedure. Higher-current configurations may be selected for specific applications requiring higher test current.

Q: Can the tester measure resistance in large circuit breakers?
A: Yes, provided the instrument's current, measurement range and connection configuration meet the requirements of the circuit breaker.