Product introduction

The UHV-H100P high-precision contact resistance test set is an electronic instrument specifically designed for accurately measuring low-value resistances. Its primary application is measuring contact resistance or loop resistance in electrical systems, including switches, circuit breakers, disconnect switches, busbar connections, cable joints, and similar equipment.
Technical Parameters
| Measuring range | 50A 0~10mΩ |
| 100A 0~5mΩ | |
| Resolution | 0~99.99μΩ, 0.01μΩ |
| 100.0~10000.0μΩ, 0.1μΩ | |
| Test current | DC50A, 100A two-speed fixed output |
| measurement accuracy | ±(0.5% rd+2d) |
| Operating Time Options | Quick, 10s, 30s, 60s |
| Display method | 4-inch touchscreen |
| communication mode | U disk dump |
| Working power | AC220V±10% 50Hz |
| Total power | 600W |
| Maximum storage record | 200 |
| working environment | temperature: -10℃~40℃, humidity:≤80%RH |
| Dimensions | 390×300×150 mm3 |
| Weight | 6kg(No attachments) |
Significant product advantages

1. Ensure the safe operation of equipment: An increase in circuit resistance is the main cause of equipment overheating or even burning out. This contact resistance test instrument supplier can directly detect this hidden danger and prevent it from developing into a major safety accident due to poor contact.
2. High precision and strong anti-interference ability: By using the DC voltage drop method (such as 100A constant current source), loop resistance tester manufactures can effectively overcome the interference of contact potential, accurately measure micro ohm level (μ Ω) resistance, and the results are reliable.
3. Improve operation and maintenance efficiency: The testing process is fast and simple, which can intuitively and quantitatively reflect the connection quality, provide accurate data support for status maintenance, avoid blind disassembly and excessive maintenance, and significantly improve work efficiency.
Primary Applications
1. Power system:
Power plants, substations, and converter stations: circuit resistance testing for high/medium voltage circuit breakers (SF6, vacuum), isolating switches, GIS composite appliances, busbars, bushings, grounding switches, etc.
Transmission lines: Contact resistance testing of cable joints and clamps.
Distribution network: Contact resistance testing of distribution switchgear, load switches, fuses, etc.
2. Manufacturing industry: Factory testing and quality inspection of switch equipment manufacturers' products.
3. Industrial users: Preventive testing of internal power equipment in large factories, mines, petrochemical enterprises, etc.
4. Rail transit: Testing of traction power supply system switchgear for high-speed trains and subways.
5. Research and quality inspection institutions: verification of relevant standards, research on material resistance characteristics, etc.
6. Other occasions that require precise measurement of low resistance values, such as welding point resistance, metal material resistivity (requiring fixture coordination), etc.








How Does UHV Ensure Strong Anti-Interference Performance?
Substation environments often contain strong electromagnetic interference.
UHV contact resistance test instrument factory utilize:
Digital filtering technology
High-frequency switching power supply
Precision signal acquisition circuits
Stable constant-current source output
These technologies help ensure measurement stability and repeatability in operating substations and industrial environments.
Does UHV Equipment Comply with IEC and IEEE Standards?
Yes.
UHV contact resistance tester supplier is designed according to:
DL/T845.4 Power Industry Standard
SD301 Regulations for Power Equipment Testing
In addition, contact resistance testing methods are aligned with international practices referenced in:
IEC 62271-100
IEEE C37 series standards
The use of 100A DC and above for circuit breaker contact resistance measurement supplier follows widely accepted industry requirements.
Do You Provide Calibration Certificates and Quality Documentation?
Yes.
Before shipment, every UHV instrument undergoes:
Functional testing
Performance verification
Factory inspection
Quality control procedures
Available documentation includes:
Factory Test Report
Inspection Certificate
User Manual
Calibration-related documentation upon request
UHV operates under a certified quality management system.
Does the Tester Support Data Storage and Reporting?
Yes.
Depending on the model, UHV testers provide:
Internal data storage
U-disk (USB) export
Historical record management
Touchscreen operation
Printing support
Data transfer for report generation
Some models can store up to 200 test records and allow convenient data export for maintenance documentation.
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
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