At the factory inspection station of a switchgear production assembly line, or when measuring the resistance of a circuit breaker's conductive circuit at a substation maintenance site, selection personnel often need to weigh the operational complexity, data readability, and on-site adaptability of an instrument. The HLY-100C Switch Circuit Resistance Tester is designed for such comparison needs, adopting a single-button operation logic: after pressing the test button, the device automatically completes current output, voltage sampling, and resistance calculation, and the test data is displayed on an LCD screen for easy on-site recording.
Traditional circuit resistance testing often requires separately adjusting the current, switching ranges, and manually recording readings, involving many steps and high dependence on the operator. The HLY-100C integrates current output, voltage sampling, and resistance calculation into a single button action, reducing manual intervention steps. For design and selection personnel, this means lower on-site training costs and easier assurance of testing consistency among different teams. The device is suitable for measuring the circuit resistance of switch control equipment, and the test results are presented directly as resistance values without additional conversion.
The current range for circuit resistance testing is not simply the higher the better; it needs to be comprehensively judged in combination with the rated current of the switch under test and the cross-sectional area of the conductive circuit. The 100A range can provide sufficient signal-to-noise ratio in the conductive circuit measurement of most medium-voltage switchgear, while reducing the requirements for on-site power supply capacity and test cable cross-section. The current output capability of the HLY-100C matches the measurement needs of switch control equipment circuit resistance. During selection, the resolution and range coverage under this range can be confirmed against the circuit resistance limit requirements of the equipment under test to see whether they meet the acceptance standards. If the object under test is extra-large switch equipment, the applicability of models with higher current ranges should be evaluated separately.
The device has an outline dimension of 200 mm and a weight of 5 kg (excluding accessories). In maintenance passages with limited space in front of and behind switchgear, a single person can complete the handling and wiring layout. The LCD display makes it easy to read data in switch room environments with ordinary lighting conditions. The storage method of test cables and accessories affects on-site deployment efficiency, and the accessory configuration should be confirmed during selection based on common testing distances. The above information and technical parameters are sourced from Yangzhou Darui Electric Co., Ltd. and are compiled and released by it.
The HLY-100C is suitable for measuring the circuit resistance of switch control equipment. Typical scenarios include factory inspection of switchgear, handover tests of circuit breaker conductive circuits, and circuit resistance rechecking after maintenance. For on-site operations that require frequent switching of test points and have limited time for a single test, the single-button operation and direct reading display help shorten the time consumed per test point. If the measurement objects are mainly high-voltage switches and there are higher requirements for current output, it is recommended to compare the parameter tables of models with different current ranges during the selection stage before making a decision.
