Product Overview
The HLC-500 Loop Resistance Tester adopts high-frequency switching power supply technology and digital signal processing circuits, and is suitable for measuring the contact resistance of conductive loops such as switch control equipment, circuit breakers, and disconnectors. The instrument outputs a stable DC test current, which can effectively suppress interference signals during measurement and improve the repeatability of measurement results.
Technical Parameters
Test current: 100A, 200A, 300A, 500A selectable; Measurement range: 0～1999.9μΩ; Resolution: 0.1μΩ; Accuracy: ±(0.5% reading + 0.2% full scale); Display: 4.3-inch color LCD screen, supporting data storage and query; Power supply: AC 220V±10%, 50Hz; Working environment: temperature -10℃～50℃, relative humidity ≤85%RH; Dimensions: approximately 360mm×280mm×180mm; Weight: approximately 6kg.
Functional Features
The instrument has automatic range switching, overcurrent protection, and overheating protection functions; supports single measurement and continuous measurement modes; built-in large-capacity memory can save multiple sets of test data; equipped with a micro printer interface and USB communication interface for easy data export and archiving; adopts a portable chassis design, suitable for on-site and laboratory use.
Application Scenarios
Suitable for handover tests and preventive tests of electrical equipment in power systems, industrial and mining enterprises, rail transit, and other fields. It can measure the contact resistance of conductive loops such as circuit breakers, disconnectors, busbar connection points, and cable joints, helping operation and maintenance personnel judge the connection status of the loop.
Instructions for Use
Before use, please confirm that the instrument is reliably grounded and the test leads are firmly connected; do not touch the test clips or the circuit under test during measurement; the instrument should be stored in a dry and ventilated place, avoiding severe vibration and corrosive gas environments. For specific operations, please refer to the accompanying manual.
