EN
GDHL-100HC Handheld Loop Resistance Tester
GDHL-100HC Digital Intelligent Handheld Loop (Contact) Resistance Tester with 100A DC Constant Current, Built-in Lithium Battery, Four-Terminal Sensing, for On-Site Quick Measurement of HV Switchgear & Disconnectors.
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
GDHL-100HC is a professional handheld high-current micro-ohmmeter designed for on-site quick measurement of contact/loop resistance of pole-mounted circuit breakers, disconnectors, cable joints and low-voltage switchgears in power systems. It strictly complies with DL/T 845.4-2004, IEC 62271-100 and GB 50150-2016 standards, and outputs 100A DC constant current as required by the latest power equipment preventive test regulations.
Adopting high-frequency switching power supply + 16-bit Σ-Δ ADC technology, the instrument features 0.01μΩ ultra-high resolution and ±(0.5% reading + 2μΩ) accuracy. The four-terminal Kelvin measurement completely eliminates lead resistance interference. The built-in 12.6V/7.5Ah high-capacity lithium battery provides ≥6 hours continuous working time and ≥100 tests per charge, eliminating the need for external AC power supply.
Specifications
| Parameter | Specification |
|---|---|
| Compliance Standards | DL/T 845.4-2004, IEC 62271-100, GB/T 10230, GB 50150-2016 |
| Test Current | DC 100A (constant current, ripple ≤0.1%) |
| Resistance Range | 0–1999.9μΩ (max 50mΩ with extended cables) |
| Resolution | 0.01μΩ (0–99.99μΩ); 0.1μΩ (100–1999.9μΩ) |
| Accuracy | ±(0.5% reading + 2μΩ) |
| Open-Circuit Voltage | ≥12V DC |
| Test Duration | 5s–60s adjustable, continuous output |
| Power Supply | Built-in 12.6V/7.5Ah lithium battery; AC 220V charging |
| Battery Life | ≥6 hours continuous working, ≥100 tests per charge |
| Charging Time | ≤4 hours |
| Display | 4.3” color LCD, high brightness, sunlight readable |
| Operation | Touch key, Chinese/English bilingual |
| Data Storage | 1000 groups (with time stamp, ID and test current) |
| Interface | USB 2.0 (data export) |
| Operating Temperature | -10℃ ~ +50℃ |
| Humidity | ≤85% RH (non-condensing) |
| Dimensions (L×W×H) | 240×160×100mm |
| Weight | ~2.3kg (including battery) |
| Enclosure | ABS+PC engineering plastic, IP54 |
Applications
Core Test Objects
- Pole-mounted equipment: 10kV pole-mounted circuit breakers, reclosers, sectionalisers
- Disconnectors: Outdoor disconnectors, earthing switches, load switches
- Low-voltage equipment: Low-voltage circuit breakers, contactors, busbar joints
- Cable systems: Cable conductor resistance and welded joint resistance
Typical Usage Scenarios
- Power companies: Substation patrol inspection, emergency repair, distribution network equipment test
- Distribution network operators: Pole-mounted switch regular inspection and fault diagnosis
- Power plants: Auxiliary equipment quick test and emergency maintenance
- Industrial enterprises: On-site electrical equipment maintenance and safety inspection
Advantages
Compliance with Latest Standards
Fully meets DL/T 845.4-2004, IEC 62271-100, GB 50150-2016 → test results are globally recognized
Industry-Leading Handheld Design
2.3kg ultra-light weight, one-hand operation, built-in battery → ideal for on-site quick test and emergency repair where AC power is unavailable
100A True DC Current
100A constant current ensures accurate simulation of actual operating conditions for switch contacts
Four-Terminal Eliminates Lead Error
Kelvin method removes cable resistance interference → readings are stable and repeatable even with 20m long test cables
FAQ
Q: How long can the battery last on a single charge?
A: The built-in 12.6V/7.5Ah lithium battery provides ≥6 hours continuous working time and ≥100 tests per charge under normal use. It supports charging while testing, so you can use it even when the battery is low.
Q: Can it measure very low resistance (≤1μΩ)?
A: Yes. With 0.01μΩ resolution and 100A current, it accurately measures 0.1–1μΩ contact resistance in low-voltage switchgear and cable joints.
