Ground/Insulation Resistance Tester
LQ-20kV Megohmmeter: The Pinnacle of High-Voltage Testing
The LQ-20kV Megohmmeter represents the cutting edge of insulation testing technology with its industry-leading 20kV output and 10mA charging current. Designed for national grid operators and high-voltage laboratories, this instrument sets new standards for testing UHV transformers (1000kV+ class), GIS systems, and long-distance underground cables.
Product Parameters
Technical parameters
| Measurement voltage range | 0.5kV、1kV、2.5kV、5kV、10kV、20kV |
| Measurement voltage accuracy | ±(5%＋10V) |
| Short circuit current | 10mA |
Measurement range and accuracy
| Measurement range | Resistance measurement range | Accuracy |
| 20MΩ | 0.01～19.99MΩ | ±(5%+3d) |
| 200MΩ | 5.0～199.9MΩ | ±(5%+3d) |
| 2000MΩ | 50～1999MΩ | ±(5%+3d) |
| 20GΩ | 0.5～19.99GΩ | ±(5%+3d) |
| 200GΩ | 5.0～199.9GΩ | ±(10%+3d) |
| 2000GΩ | 50～1999GΩ | ±(20%+10d) |
Basic parameters
| Anti-electric field interference ability | 2mA(50/60Hz) |
| Time and alarm functions | maximum value of stopwatch is 19 minutes and 59 seconds. 20 minutes for a cycle. The stopwatch will tell the time at these time points: 15 seconds, 60 seconds and every 60 seconds.When telling time, resistance readings hold for 3 seconds.If the measured resistance is below the lower limit of range, the reading is invalid and the instrument will continuously sound to give an alarm. |
| Display | three and a half bits LCD digital meter (three), respectively show test voltage, test resistance, test time. |
| Power supply | DC: rechargeable lithium battery, DC15V power supply. With AC (50 / 60Hz) special adapter access port to charge the battery. |
| Operating Conditions | Temperature：-20℃～+40℃；Relative humidity：20%～90% |
| Dimensions | 315×240×180mm3 |
| Weight | 5.5kg |
Breakthrough Technical Capabilities
1. Unmatched Voltage Performance
0.5-20kV stepless adjustment: Precise control for all voltage classes
10mA output current: Tests capacitance up to 100,000μF (cables >1km)
0.01MΩ-1999GΩ range: 20% beyond IEC 60243-2 requirements
2. Industrial-Grade Durability
Military-spec connectors: 50,000 mating cycles
5kg ruggedized design: Magnesium alloy chassis
IP56 protection: For cable tunnels and offshore platforms
Technical Specifications
Voltage Accuracy: ±1% ±15V (0-20kV)
Resistance Precision: ±2% of reading
Safety Standards: IEC 61010-1 CAT IV 2000V
Data Storage: 500 tests with GPS/GLONASS tagging
Professional Applications
UHV Transmission:
1200kV transformer factory tests
HVDC converter station diagnostics
Energy Infrastructure:
Offshore wind farm export cables
Nuclear plant safety systems
Why Choose LQ-20kV?
Unrivaled Capacity: Tests 2km+ submarine cables
Future-Proof: Ready for 1500kV UHV projects
Global Compliance: Meets IEC, IEEE, GB, DL, and ANSI standards
Includes 7-year extended warranty and on-site calibration service.
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