The AC impedance tester for generators is the core equipment for evaluating the health status of generator windings. Its advantages are reflected in high-precision measurement, multifunctional integration, safety and reliability, and convenient operation, which can significantly improve testing efficiency and reduce maintenance costs. The following is a detailed analysis of specific advantages:
1. High precision measurement, reliable results
① Multi parameter synchronous acquisition
It can simultaneously measure parameters such as AC voltage, current, impedance, active power, frequency, etc., avoiding the accumulation of errors that may occur from single parameter measurements.
② High precision sensors and algorithms
Adopting a high-precision sensor of 0.2 level, combined with digital signal processing (DSP) technology, effectively suppresses noise interference and ensures measurement result repeatability error ≤ 0.5%. Support automatic calibration function, which can eliminate the influence of environmental temperature and humidity changes on measurement values.
③ Wide range coverage
The impedance measurement range usually reaches 0~999.999 Ω, and the voltage/current range covers 0~600V/120A, which is suitable for the testing needs of generators with different capacities.
2. Multi functional integration, one machine with multiple uses
① Comprehensive fault diagnosis
a. Interturn short circuit detection: locates the short circuit point through abnormal decrease in impedance modulus, with sensitivity more than 10 times higher than traditional DC resistance testing.
b. Insulation aging assessment: Analyze the trend of impedance angle changes and provide early warning of insulation material carbonization or moisture issues.
c. Winding deformation analysis: Combining frequency response characteristics (FRA) testing to identify winding displacement or deformation caused by mechanical stress.
② Dynamic testing capability
Support sweep frequency testing, can draw impedance frequency curves, analyze the electromagnetic characteristics of the generator under different operating conditions, and provide a basis for grid stability evaluation.
③ Data storage and playback
Built in large capacity storage, capable of storing thousands of sets of test data, supporting classification and retrieval by time and unit number, facilitating long-term tracking of equipment status changes.
3. Safe design, worry free operation
① Multiple protection mechanisms
a. Overvoltage/overcurrent protection: automatically cuts off the power supply and alarms to prevent the test voltage/current from exceeding the generator insulation withstand value.
b. Zero position detection of voltage regulator: Force the voltage regulator to zero before each test to avoid equipment impact caused by misoperation.
c. Grounding detection: Real time monitoring of grounding status, and testing is prohibited when there is no reliable grounding.
② Isolation design
The input/output channel adopts optoelectronic isolation technology to block the electrical connection between the high voltage side and the low voltage side, preventing damage to the tester or electric shock to personnel.
③ Anti misoperation design
Key operations (such as starting tests and parameter modifications) require secondary confirmation to avoid testing interruptions or data loss caused by accidental touches.
4. Easy to operate and improve efficiency
① Intelligent interface
Equipped with a large-sized color touch screen, supporting Chinese menu navigation, parameter settings, and curve viewing at a glance.
② Automated testing process
Support preset testing schemes (such as "no-load light load full load" multi condition testing), automatically complete parameter settings, data collection, and report generation. The testing time is reduced by more than 50% compared to traditional methods, and testing a single generator only takes 10-15 minutes.
③ Portable design
Compact in size and lightweight, it can be carried by a single person to the site for testing, and is suitable for complex environments such as power plants and wind farms.
5. Economy and scalability
① Reduce maintenance costs
Reduce unplanned downtime through early fault warning and avoid major maintenance costs caused by winding damage. Extend the service life of the generator and improve equipment utilization.
② Strong compatibility
Support linkage with upper computer software to achieve deep data analysis or remote monitoring. Expandable temperature and humidity sensor interface, combined with environmental parameters to comprehensively evaluate test results.
③ Compliant with industry standards
The testing method complies with domestic and international standards such as IEEE Std 519 and GB/T 1029, and the results are authoritative and can be used for equipment acceptance or fault arbitration.
The generator AC impedance tester has solved the problems of low efficiency, large errors, and poor safety in traditional testing methods through its high-precision, multifunctional, safe and convenient design, and has become a core tool in the field of generator maintenance. Its advantages are not only reflected in the technical aspect, but also bring significant economic benefits to enterprises by reducing operation and maintenance costs and extending equipment life.
ZC-401A Generator Rotor AC Impedance Tester is a specialized instrument for determining whether there is an inter turn short circuit in the generator rotor winding. It can measure the voltage, current, impedance, power, phase angle, and other parameters of the rotor winding automatically and manually (unidirectional or bidirectional). The tester adopts advanced high-speed microprocessor technology, which is more powerful, superior in performance, and more convenient to use. It has the characteristics of high work reliability, easy operation, high testing accuracy, and small and lightweight. At present, it is at a leading level in China.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com
