Circuit Breaker Loop Resistance Tester

Basic Functions:

Currently, conventional methods are widely used in the power system.QJ44The type double-armed DC bridge measures contact resistance, while the test current of such bridges is onlymAIt is difficult to detect defects in the reduction of the cross-sectional area of the loop conductor. When measuring the contact resistance of a high-voltage switch's conductive loop, the measured values are several times larger due to the influence of the oil film and oxidation layer between the contacts, failing to accurately reflect the true contact resistance.

As a result, the new Ministry of Power standardsDL/T845.4—2004"General Technical Conditions for Resistance Measurement Devices: Loop Resistance Tester" and the New Edition of the Verification RegulationJJG1052-2009"Regulation for Calibration of Circuit Resistance Meters and Direct Resistance Meters specifies that the measuring current for contacts such as switches (isolated) and circuit breakers should not be less than direct current."100AThe maintenance time for low current is not less than60SRegulations ensure accurate testing results.

ED0303B-100The ergonomic design of the Type Contact Resistance Tester's operating panel aligns with operational habits. It utilizes high-frequency switching power supply and digital circuit technology, suitable for measuring the circuit resistance of switching control devices.

Tested current utilizes the DC recommended by the national standard.100AAvailable in DC100ADirectly measured the loop resistance in the case, test results displayed on a large LCD screen.LCDDemonstrates, and features data storage, output printing, and time setting functionalities, as well.50AGear options available to users; customizable test timing, with a long set time599S,Significantly greater than the standard requirements60SOur 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 by power and electricity supply departments, as well as circuit resistance testing at high-voltage switch factories.

Technical Features:

High Current:

Utilizing the latest switch-mode power supply technology, it can continuously output high currents for extended periods, overcoming the drawbacks of pulsed power sources' instantaneous current spikes. It effectively punctures the oxidation film on switch contacts, yielding favorable test results.

High Stability:

Under severe interference conditions, the data behind the liquid crystal display remains stable.±1Within the specified range, the readings are stable and reproducible.

High Precision:

Deploying dual high-speed16Positioned at Σ-ΔADSampling, new digital signal processing technology, high-resolution achievement0.01μΩ is currently the only....No Chinese content provided.0.01A highly stable contact resistance tester with μΩ resolution, outperforming imported high current micro-ohmmeters.

Intelligentization:

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

High Quality:

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

Powerful Features:

Electric Current50A、100APlease make a free choice; the test time is5s~599sOur product allows for internal settings, overcoming the缺陷 of other similar instruments that cannot be set for measurement time or have insufficient continuous working time, far surpassing the performance of other similar instruments.

User-friendly Human-Machine Interface

Rotary mouse input data for convenience and speed; independently set instrument date and time; save measurement data in real-time; print measurement results immediately.

USBRepost:

ThroughUSBInterfaces will store measurement data intoUThe company has integrated the software with the mainframe to further analyze and process the measurement data.

Convenience in Use:

Compact and lightweight, easy to carry.