Product introduction
Microohmmeter is an instrument used to accurately measure tiny resistances. It is commonly used to measure the contact resistance of conductors, cables, cable joints, busbars, etc. Its working principle is to inject a small current into the object to be measured and calculate the resistance value by measuring the voltage drop through Ohm's law. Its measurement range can reach 0.1µΩ to 2000Ω, and its accuracy can reach 0.05%. It is particularly suitable for occasions where conductivity needs to be accurately verified and good contact is ensured.
Product features
Multi-speed Constant Current Source Output
The microohmmeter is equipped with a multi-speed DC constant current source, which can provide a fixed current output of 50A, 100A, 150A and 200A. This design ensures that the microohmmeter can provide a stable current under different measurement conditions, thereby reducing the impact of current fluctuations on the measurement results, making the measurement data more consistent, and is suitable for low-resistance measurement scenarios with high current requirements, such as ground resistance detection in large power facilities.
High-precision Measurement
The micro-ohm meter manufacturer has a measurement accuracy of up to 0.5%±1d, which is suitable for the precision resistance test needs of the power industry. This is because its built-in high-precision constant current source can achieve stable current output. Even when the load conditions change, the constant current source can maintain a constant current, ensuring that the measurement results are not affected by current fluctuations. At the same time, the micro-ohmmeter's high-sensitivity voltage detection module can detect tiny voltage changes, and even the weak voltage drop caused by extremely low resistance values can be clearly measured.
Continuous Working Mode
The micro-ohmmeter supplier supports continuous working mode and can measure uninterruptedly for a long time. This design is suitable for large-scale equipment detection tasks. For example, in the inspection of power systems, there is no need to frequently switch equipment, which saves detection time and improves work efficiency.
Clear Digital Display
The micro-ohmmeter factory is equipped with a 3-1/2-digit LCD display that can clearly display measurement data for quick reading on site. This display design makes the device reading more intuitive, helps reduce reading errors, and improves measurement efficiency. Especially in poor light or complex working environments, the clear display of the LCD screen greatly improves the operator's work experience and ensures the accuracy of data recording.
Product parameters
| Measuring range | 1～1999μΩ |
| Resolution | 1μΩ |
| Test current | DC50A,100A,150A,200AFour speed fixed output |
| Accuracy | 0.5%±1d |
| Way to work | The connection |
| Display | Three and a half LCD |
| Power supply | AC220V±10% 50Hz |
| Working environment | Temperature: -10℃ ~ 40℃, humidity: ≤80%RH |
| Diemension | 440(L)×410(W)×190(H)mm3 |
| Weight | 8.7kg(excluding attachments) |
Application Scenarios
Power systems: Installation acceptance, periodic maintenance, and preventive maintenance of circuit breakers and switchgear in substations and distribution stations.
Power generation enterprises: Operation and maintenance of equipment in thermal, hydro, wind, and photovoltaic power plants.
Electrical manufacturing: Production testing and factory inspection of circuit breakers, switchgear, GIS, and other equipment.
Industrial power distribution: Inspection and maintenance of power distribution equipment in industries such as factories, petrochemicals, metallurgy, and mining.
Fault diagnosis: Identifying poor contact, contact wear, loose connections, and other issues to prevent equipment overheating and failures.
FAQ
Q: What is a contact resistance tester, and why is contact resistance testing necessary?
A: Contact resistance tester manufactures uses the high-current DC injection method to measure the contact resistance of circuit breaker main contacts, disconnecting switches, and other conductive connection points. By detecting micro-ohm level resistance changes, it can promptly identify defects such as contact wear, oxidation, poor contact, or loose connections, thereby reducing the risk of overheating and ensuring long-term safe and stable operation of power equipment.
Q: Which equipment is most suitable for use with a contact resistance tester?
A: The contact resistance tester factory is widely used for contact resistance testing of high-voltage, medium-voltage, and low-voltage circuit breakers, GIS switchgear, disconnecting switches, busbar connection points, and large conductive connectors. It is suitable for various testing needs in substations, power utilities, power plants, industrial enterprises, and electrical equipment manufacturers during factory inspection, installation commissioning, and routine maintenance.
Does UHV Have Experience Serving Power Utilities?
Yes.
UHV specializes in high-voltage electrical testing equipment for:
Power utilities
Transmission companies
Distribution networks
Power plants
Renewable energy projects
Electrical equipment manufacturers
EPC contractors
The company's products are widely used for high-voltage switch maintenance, commissioning, preventive testing, and condition assessment.
What Technical Support Does UHV Provide?
UHV provides comprehensive technical support throughout the product lifecycle.
Services include:
Product selection assistance
Installation guidance
Operation training
Remote technical support
Troubleshooting assistance
Lifetime technical consultation
Spare parts support
Our engineering team can assist customers with application-specific testing requirements and project implementation.
What About Pricing and Delivery Time?
UHV is a direct manufacturer rather than a trading company, allowing us to offer competitive factory pricing.
Advantages include:
Competitive Pricing
Factory-direct supply
No intermediary markup
OEM/ODM support available
Fast Delivery
Standard models typically available from stock
Short production cycles
Global shipping support
Lead times vary depending on:
Model selection
Quantity
Customization requirements
For urgent utility or EPC projects, priority production arrangements can be discussed with our sales team.
Why Choose UHV?
✔ Professional manufacturer of high-voltage electrical testing equipment
✔ Micro-ohm resolution up to 0.01μΩ
✔ Test current options up to 200A DC
✔ Designed for GIS, circuit breakers, disconnectors, and busbars
✔ Strong anti-interference performance
✔ Compliant with power industry standards
✔ Data storage and USB export capability
✔ Factory testing and quality documentation
✔ Global technical support
✔ OEM/ODM customization available
We are a professional Microhmmeter manufacturers/Circuit Breaker Contact Resistance Tester manufacturers in China.We can provide the best professional Microhmmeter for sales and competitive price. If you are looking for Microhmmeter supplier, we are a good choice.
Contact us to get Circuit Breaker Contact Resistance Tester price.
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