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The programmable leakage current tester withstand voltage tester is composed of a high-voltage boosting circuit, a leakage current detection circuit, and an indicating meter. The high-voltage boosting circuit can adjust the test voltage required for output, the leakage current detection circuit can set the breakdown (maintenance) current, and the indicating meter directly reads the test voltage value and leakage current value (or set breakdown current value). When the sample reaches the specified time under the required test voltage, the instrument actively or passively cuts off the test voltage; once breakdown occurs and the leakage current exceeds the set breakdown (maintenance) current, it can actively cut off the output voltage and alarm at the same time, to determine whether the sample can withstand the specified insulation strength test.



The withstand voltage tester is a basic instrument for measuring withstand voltage strength. It can intuitively, accurately, quickly, and reliably test the breakdown voltage, leakage current, and other electrical safety performance indicators of various tested objects, and can also be used as an AC (DC) high voltage source to test the performance of components and complete machines. The withstand voltage test product series is designed according to international and domestic safety standards such as IEC, ISO, BS, UL, JIS, etc. The withstand voltage ranges from 3kV to 10kV, and the leakage current ranges from 0 to 200mA. Special requirements can be customized. It is suitable for various household appliances, power supplies, cables, transformers, wiring terminals, high-voltage bakelite electrical appliances, switch power plugs and sockets, motors, electronic instruments, meters, complete machines, etc., as well as the safety withstand voltage and leakage current testing of strong current systems. It is also an indispensable withstand voltage test equipment for laboratories and technical departments.



The withstand voltage tester series products are based on absorbing and digesting foreign withstand voltage testers, combined with the actual usage of many users in China to improve and perfect. The withstand voltage tester is a fully digital display type withstand voltage tester series product. The test voltage, leakage current, and test time are all digitally displayed. The leakage current ranges from 0.1 to 20mA, which can be continuously set arbitrarily according to different safety standards and user needs. In terms of measurement time, it has countdown digital display, which improves the test time accuracy to more than ±1%, and the test range is increased to 99s, with richer and more useful functions. It is at a good level in terms of technical performance and quality reliability.



Characteristics and different uses of vibration meter

      The vibration meter is also called vibration analysis meter or vibration pen. The principle of the vibration meter is designed using the piezoelectric effect of quartz crystal and artificially polarized ceramics. Generally, a piezoelectric structure is used to work.



     Programmable leakage current tester  The vibration meter is designed using the piezoelectric effect of artificially polarized ceramics. It has the intensity (velocity) diagnosis function in the vibration table, and also has a special function for diagnosing bearing and gearbox faults, and has clear diagnostic standards. It is used for periodic motion measurement to detect imbalance and deviation of moving machinery. The vibration meter uses a high-performance accelerometer to achieve accurate and repeatable measurements. The vibration meter is suitable for routine vibration measurement of mechanical equipment, and can measure vibration displacement, velocity, and acceleration. It is widely used in fields such as machinery manufacturing, power metallurgy, vehicles, and general aerospace.



      The vibration meter is equipped in equipment management institutions. According to the nature of work and division of labor, different vibration meters are allocated. The Energy Department is specially equipped with the analysis system of RION from Japan, with data collection and fault diagnosis system, and the measurement parameters are acceleration, velocity, displacement, temperature, and speed. For plant inspectors, multi-functional portable vibration meters are equipped, with measurement parameters such as acceleration, velocity, and displacement, which are convenient for inspectors to carry and mainly used for random detection of equipment working conditions. Maintenance personnel who master basic parameters can be equipped with portable series vibration meters, suitable for measuring acceleration, velocity, displacement, etc. of all mechanical equipment such as motors, pumps, fans, and compressors in detection work.



Measurement methods and determination basis of vibration meter

     1. Selection of measuring points for vibration meter: Use the vibration meter to test the bearings and axial end points of main equipment, and equip with on-site inspection records. Each measuring point must correspond to each other.

　　2. Measurement cycle of vibration meter: After major overhaul or near major overhaul, measure once every two weeks; during normal operation, measure once a month; if the measured value has obvious changes compared with the previous measurement, the inspection density should be strengthened to prevent sudden failures and downtime.

　　3. Determination basis of vibration meter measurement value: Refer to the international standard ISO2372.

　　Speed: 600～1200r/min, vibration measurement range: 10～1000Hz.

　　Usually, when the equipment is working normally, the detection velocity value is in the range of 4.5～11.2mm/s (for units above 75kW) for monitoring use. If it exceeds 7.1mm/s, major repair should be considered. The determination of this value should consider not only the motor capacity of the equipment, but also the continuity of operation, safety and reliability, etc.

Programmable leakage current tester







Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.