High Precision Contact Resistance Tester 100A 200A 400A DC Micro-Ohmmeter for Circuit Breaker, Switchgear, Busbar and Electrical Contact Resistance Testing
Product Description
The High Precision Contact Resistance Tester is a professional low-resistance measurement instrument designed to measure extremely low resistance values in electrical contacts and conductive connections.
The tester uses a high-current DC test source to provide stable current through the device under test and accurately measures the voltage drop across the test point. The resistance value is then calculated and displayed in micro-ohms.
It is widely used for high-voltage circuit breakers, switchgear, disconnectors, busbar joints, isolator contacts and other low-resistance electrical connections.
The system is designed for both factory inspection and field maintenance applications, helping engineers identify abnormal contact resistance before it develops into excessive heating, energy loss or equipment reliability problems.
Main Testing Functions
- Circuit breaker contact resistance test
- Switchgear contact resistance test
- Isolator contact resistance test
- Disconnector contact resistance test
- Busbar joint resistance test
- Electrical connection resistance test
- Micro-ohm resistance measurement
- Low-resistance measurement
- DC high-current injection
- Voltage drop measurement
- Resistance trend comparison
- Automatic test timing
- Test data storage
- Data export
- Test report generation
Key Advantages
High-current testing: Configurable DC test current such as 100A, 200A or higher depending on the model.
Micro-ohm resolution: Designed to detect very small resistance changes.
Stable measurement: Constant-current technology helps provide repeatable test results.
Portable design: Suitable configurations are available for field testing.
Digital data management: Test results can be stored, printed or transferred to a computer.
FAQ
Q: What is a contact resistance tester used for?
A: It measures very low resistance at electrical contacts and conductive joints, especially in circuit breakers, switchgear and busbar connections.
Q: Why is high test current required?
A: High test current helps produce a measurable voltage drop across very low-resistance contacts, improving the reliability of the measurement.
Q: Can the tester be used for circuit breakers?
A: Yes. Circuit breaker contact resistance measurement is one of its primary applications.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.