Loop Resistance Tester

Currently, conventional methods are widely used in the power system.QJ44The model double-armed DC bridge measures contact resistance, while the testing current of such bridges is onlymAIt is difficult to detect the defect of reduced cross-sectional area in the circuit conductors. When measuring the contact resistance of the conductive circuit of high-voltage switches, the measurement values are several times larger due to the influence of the oil film and oxidation layer between the contacts, failing to accurately reflect the actual contact resistance.

For this reason, the new Department of Power StandardsDL/T845.4—2004"General Technical Conditions for Resistance Measuring Devices: Loop Resistance Meters" and the New Inspection and Verification RegulationJJG1052-2009The规程 for the Calibration of Loop Resistance Testers and Direct Resistance Meters specifies that the measuring current for the contact resistance of switches (isolated), circuit breakers, etc. must not be less than direct current.100AThere is no Chinese content provided for translation.60SRegulations are in place to ensure accurate test results.

ED0303B-100The human engineering design of the Type Contact Resistance Tester's operation panel conforms to operational habits. It utilizes high-frequency switching power supplies and digital circuit technology, suitable for measuring the circuit resistance of switch control devices.

Test current is conducted using the direct current as recommended by the national standard.100AAvailable in DC100AIn the case, the circuit resistance was directly measured, with the test results displayed on a large LCD screen.LCDWith display capabilities, data storage, output printing, and time settings functions, and more.50AGear options available for user selection; customizable test duration, with a maximum set time.599S,Significantly greater than the standard specifications.60SOur company is the sole domestic provider in....No Chinese content provided.0.01μΩ resolution and highly stable contact resistance tester, outperforming imported high current micro-ohmmeters.

Meets the requirements for on-site high-voltage switch maintenance for power and supply departments and circuit resistance testing at high-voltage switch factories.

Technical Features:

High Current:

The new switching power supply technology allows for continuous, long-duration output of high currents, overcoming the drawbacks of pulsed power supplies' instantaneous current spikes. It effectively pierces the oxidation film on switch contacts, yielding excellent test results.

High Stability:

Under severe interference conditions, the subsequent data behind the liquid crystal screen can maintain stability.±1Within a certain range, the readings are stable and have good repeatability.

High Precision:

Utilizing dual-high-speed16Positioned at Σ-ΔADSampling, new digital signal processing technology, high resolution achieved0.01μΩ is currently the only....No Chinese content provided.0.01μΩ resolution and highly stable contact resistance tester, outperforming imported high current micro-ohmmeters.

Intelligentization:

Import High-PerformanceCPUThe system automatically switches the range based on signal size during measurement, ensuring test accuracy. The over-temperature protection circuit stops the output current automatically when the instrument exceeds the set temperature, ensuring safe operation of the equipment.

High Quality

All critical components are imported, and the influence of ambient temperature on measurement results is effectively eliminated by the cleverly designed temperature compensation circuit. The use of military-grade connectors enhances vibration resistance.

Powerful Functionality:

Electric Current50A、100ANo Chinese content provided for translation.5s~599sOur internal settings overcome the缺陷 of other similar instruments that cannot be set for measurement time or a short continuous working time, far surpassing the performance of other similar instruments.

User-friendly Human-Machine Interface

The rotary mouse input data efficiently, allowing for easy customization of instrument date and time, real-time saving of measurement data, and immediate printing of results.

USBRepost:

ThroughUSBInterfaces will transfer measured data for storageUThe company has integrated the measurement data with supervisory computer software for further analysis and processing.

User-friendly:

Compact and lightweight for easy portability.