Circuit Breaker (Switch) Test Instrument
LQHV-H200P 200A Micro Ohmmeter | 0.01μΩ High-Precision Resistance Tester
The LQHV-H200P Micro Ohmmeter sets a new benchmark for high-current, high-precision resistance testing in HV/LV switches, cable lines, and micro-resistance applications. With adjustable 50A-200A DC outputs and 0.01μΩ resolution, it outperforms imported testers while complying with DL/T 845.4-2004 and JJG1052-2009 standards.
Technical Parameters
| Measuring range | 50A 0～10mΩ |
| 100A 0～5mΩ | |
| 150A 0～3.333mΩ | |
| 200A 0～2.500mΩ | |
| Resolution | 0～99.99μΩ, 0.01μΩ |
| 100.0～10000.0μΩ，0.1μΩ | |
| Test current | DC 50A, 100A, 150A, 200A four-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 | 1000W |
| Maximum storage record | 200 |
| working environment | Temperature: -10°C~40°C, humidity: ≤80%RH |
| Dimensions | 390×300×200 mm3 |
| Weight | 7kg(No attachments) |
Product Overview
Traditional testers (e.g., QJ44 bridge) fail to detect conductor defects due to mA-level currents. The H200P solves this with:
Adjustable current (50A/100A/150A/200A) for versatile testing
0.01μΩ resolution (dual 16-bit Σ-Δ AD sampling)
60-second minimum current hold per JJG1052-2009 requirements
Key Specifications
Current Outputs: 50A/100A/150A/200A DC (user-selectable)
Resolution: 0.01μΩ (industry-leading precision)
Accuracy: ±0.5% RDG ±2 digits
Test Duration: Fast/10s/30s/60s or customizable
Compliance: DL/T 845.4-2004, JJG1052-2009
Display: Touchscreen LCD with data storage & USB export
Premium Features
1. Unmatched Precision
16-bit Σ-Δ AD technology achieves 0.01μΩ resolution – surpassing imported competitors.
2. Intelligent Operation
Imported CPU auto-ranges measurements and triggers over-temperature protection for safety.
3. Military-Grade Build
Key imported components and military connectors ensure reliability in harsh environments.
4. Advanced Data Management
USB data export + PC software integration for in-depth analysis.
5. Ergonomic Touchscreen
Intuitive interface with real-time printing and timestamped data storage.
Applications
HV/LV switch contact resistance testing
Cable line DC resistance measurement
Circuit breaker maintenance (100A+/60s per standards)
Factory acceptance tests (FAT) for power equipment
Why the H200P Outperforms
Regulatory Excellence: Exceeds DL/T 845.4-2004 & JJG1052-2009 requirements.
Future-Ready Tech: Touchscreen controls and digital data workflows.
Versatile Current Ranges: 50A-200A for diverse testing scenarios.
Note: For optimal accuracy, use manufacturer-calibrated probes and annual calibration services.
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