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GDHL-100A
CHONGQING GOLD
100A Portable Anti-interference Loop Resistance Tester IEC 62271-1
▍Poor contact in high-voltage circuit breakers and disconnectors can cause excessive contact resistance, leading to overheating and equipment burn-out during operation. This is a key inspection item for substation maintenance. Ordinary low-current instruments cannot reproduce the actual current-carrying conditions of the switches, which can easily lead to misjudgments.
Product Highlights
★100A DC High Current Output, Reproducing the True Current-Carrying State of the Switch
Based on the IEC62271 standard, a 100A DC test current avoids misjudgments of contact status caused by low-current testing, accurately reflecting the contact performance of the circuit breaker contacts.
★Four-lead Kelvin measurement, micro-ohm level high precision
C1/C2 current output, P1/P2 voltage sampling with separate wiring; voltage sampling clamp inside the contact head, eliminating lead and clamp contact resistance from the outset; resolution 0.1μΩ, ensuring accurate and reliable measurement results.
★Dual test modes adapt to different field needs
Fast measurement: 100A output held for 1 second, enabling rapid results for large-scale on-site inspections;
Standard measurement: 100A continuous output for 60 seconds, real-time observation of resistance changes with energization time, identifying potential contact thermal stability issues.
★Complete Data Loop: Storage – Printing – Word Export
This unit can store up to 100 sets of timestamped test records; it has a built-in mini thermal printer for direct on-site printing of paper reports; RS232 serial communication allows data upload via accompanying software and one-click export of archived Word reports.
★English LCD User Interface
Menu-based button operation allows setting the system time, viewing, retrieving, and deleting historical records. The simple operation logic allows field personnel to quickly learn how to use it.
★Portable Industrial Protective Enclosure
The integrated portable protective enclosure features simple wiring and comes with an 8-meter-long test cable to meet wiring requirements at different distances within the switchgear cabinet.
Panel Terminals
- C1, C2: High-current output terminals, outputting 100A DC test current
- P1, P2: Voltage sampling terminals (four leads, connected to the inside of the contact under test)
- Ground: Protective grounding terminal
- RS232: Computer data communication interface
- Power: AC220V power input, main power switch
- Control keys: Exit, direction, and confirm operation buttons
- Micro printer: Built-in on-site thermal printer
Technical Specifications
| Item | Specification |
|---|---|
| Model | GDHL‑100A |
| Test Current | DC 100A |
| Measuring Range | 0‑1999.9 μΩ |
| Resolution | 0.1 μΩ |
| Measurement Accuracy | ＜0.5% RDG +0.05%FS |
| Test Mode | Fast Measurement(1s) / Standard Measurement(60s) |
| Data Memory | Max.100 groups records |
| Display | LCD liquid‑crystal display |
| Output Device | Built‑in micro thermal printer |
| Communication Interface | RS232 (export data to MS‑Word) |
| Power Supply | AC220V |
| Operating Temperature | -10℃ ~ +40℃ |
| Relative Humidity | ＜80% RH, non‑condensing |
The standard kit includes:
1 × GDHL-100A Loop Resistance Tester Main Unit
1 Set of 8-meter Four-Lead Test Cable Clamps
1 × AC220V Power Cord
1 × Protective Grounding Wire
1 × Accompanying Software CD (Supports Exporting Word Reports)
1 × User Manual
1 × Certificate of Conformity and Test Report
For large-scale on-site inspections, prioritize the fast 1-second mode; if thermal instability is suspected in the contacts, use the standard 60-second long-time mode to monitor resistance changes in real time.
A 100A current flowing through the test cable will cause a voltage drop; the four-lead connection separates the current loop and the voltage sampling loop, eliminating measurement errors caused by cable and clamp contact resistance, ensuring accurate measurements down to the micro-ohm level.
A: Connect the instrument to a computer via RS232, use the accompanying host computer software to read the locally stored records, and save and export a one-click MS Word report for direct use in project archiving.
A: No, the standard mode allows a maximum continuous output of 60 seconds; continuous operation requires intermittent cooling to prevent the power unit from overheating.
Contact us:
Contact Person: Christine Gou
Mobile/Whatsapp: +86 15123029885
Email: gold05@hy-industry.com
