Product Introduction
The Handheld Loop Resistance Tester is a high-precision portable instrument designed for measuring contact resistance and loop resistance in high-voltage electrical equipment.
It is widely used in power system maintenance, substations, switchgear testing, and circuit breaker inspection.
With a high-current output of up to 100A and ultra-low resistance measurement capability, the device ensures stable and accurate results in field testing environments.
Functional Features
- 7-inch full-color touch screen for easy operation
- High current output up to 100A
- Multiple test current options (30A / 50A / 80A / 100A)
- Resolution up to 0.01μΩ
- Accuracy up to ±0.5%
- Supports up to 60s test duration
- Built-in open circuit and overheat protection
- Data storage up to 1000 test records
- High-capacity lithium battery supports 600+ tests per charge
- Intelligent power management system
- Optional Bluetooth printing function
- Portable handheld design
Technical Specifications
Output Current & Measuring Range
| Output Current |
Measuring Range |
| 100A |
0 ~ 5 mΩ |
| 80A |
0 ~ 10 mΩ |
| 50A |
0 ~ 20 mΩ |
| 30A |
0 ~ 50 mΩ |
General Specifications
| Item |
Specification |
| Output Current |
30A / 50A / 80A / 100A |
| Test Time |
1s / 5s / 10s / 30s / 60s |
| Resolution |
0.01 μΩ |
| Accuracy |
±0.5% ±1 μΩ |
| Max Power |
200W |
| Power Supply |
DC 12.6V lithium battery |
| Battery Life |
≥600 tests (1s test) |
| Test Lead Resistance |
≤10 mΩ |
Working Principle
The instrument works based on the high current injection method. A stable DC current is injected into the tested loop, and the voltage drop is measured. The resistance value is calculated using the formula:
R = U / I
Applications
- Circuit breaker contact resistance testing
- Switchgear loop resistance measurement
- Substation maintenance
- Power system inspection
- Electrical equipment commissioning
- Industrial electrical testing
FAQ
1. What is this device used for?
It is used to measure contact resistance and loop resistance in electrical equipment such as circuit breakers and switches.
2. What is the maximum test current?
It supports up to 100A output current.
3. Is it suitable for field testing?
Yes, it is battery powered and designed for outdoor field use.
4. Does it support data storage?
Yes, it can store up to 1000 test records.
5. Does it support printing?
Yes, optional Bluetooth printer is supported.
Warranty
The Handheld Loop Resistance Tester comes with a 2-year warranty, including technical support and repair service during the warranty period.
