High-PrecisionLoopResistanceMeasurementwith ZXHL-200A Tester: Technical Overview

     The ZXHL-200A Loop Resistance Tester is a state-of-the-art instrument designed for accurate measurement of contact resistance in high-voltage switching devices and other applications requiring high-current, low-resistance testing. Developed in compliance with the DL/T845.4-2004 standard, this device integrates advanced high-frequency switching power supply technology and digital circuitry to deliver reliable performance under demanding field and laboratory conditions. Its ability to generate stable DC currents of up to 200A ensures precise detection of micro-resistance values, making it indispensable for power utilities, substation maintenance teams, and high-voltage equipment manufacturers.

Key Features

1.High-Current Output
The ZXHL-200A employs a continuous DC current output system, offering four fixed current modes: 50A, 100A, 150A, and 200A. Unlike pulsed current systems, this design ensures sustained current delivery, effectively penetrating oxidation layers on switch contacts to obtain true resistance values.

2.Enhanced Anti-Interference Capability
Equipped with noise suppression technology, the instrument maintains stable readings (±1 LSD) even in electromagnetically hostile environments. The 3.5-digit LCD provides consistent repeatability for critical measurements.

3.Robust Construction & Portability
Precision-grade resistors and industrial-grade connectors ensure long-term stability and resistance to environmental factors such as vibration and temperature fluctuations (-10°C to 40°C). Despite its rugged design, the compact form factor (380×350×260 mm³) and lightweight (5 kg) enable easy field deployment.

4.User-Centric Design
Direct-read resistance measurements eliminate manual calculations, while automatic current adjustment simplifies operation. The device operates on standard AC 220V±10% power, aligning with global grid compatibility.

Technical Specifications

 Applications

1.Primary Use: Measurement of contact resistance in circuit breakers, disconnectors, and busbar systems in high-voltage switchgear.

2.Extended Applications:

Quality control in HV switch manufacturing.

Grounding system resistance evaluation.

Precision micro-resistance testing in transformers, cables, and welding joints.
     The ZXHL-200A Loop Resistance Tester sets a benchmark for accuracy and reliability in critical electrical testing scenarios. Its combination of high-current stability, environmental resilience, and intuitive operation addresses the practical challenges faced by technicians in both field and industrial settings. By adhering to international standards and leveraging advanced engineering, this instrument ensures efficient diagnostics and maintenance of power infrastructure, ultimately enhancing system safety and longevity.

     GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/