Transformer Test Equipment

The Sweep Frequency Response Analyzer is designed for power transformers with a voltage grade of 66kV and above, as well as other special-purpose transformers. During operation and transportation, power transformers are vulnerable to impacts from fault short-circuit currents or physical collisions. These conditions can cause the transformer windings to lose stability due to the powerful electro-dynamic forces exerted by the short-circuit currents. This may lead to permanent deformations, such as local distortion, swelling, or dislocation, all of which can severely affect the transformer's safe operation.To assess the deformation of transformer windings, the frequency response analysis method is used in accordance with the national standard DL/T911-2016 and IEC 60076-18 for the electric power industry. This method involves detecting the amplitude-frequency response characteristics of each transformer winding. The results are then compared either vertically or horizontally to identify potential deformation, based on changes in the amplitude-frequency response characteristics.

This Capacitance Inductance Tester is specifically designed to address the challenges in measuring high-voltage shunt capacitor banks in substations. It complies with national standards, including GB3983.2-1989 "High-voltage Shunt Capacitors," DL/T840-2003 "Technical Conditions for the Use of High-voltage Shunt Capacitors," and JB5346-1998 "Series Reactors". It is developed primarily for the measurement of high-voltage parallel capacitor banks and reactors used in reactive power compensation devices.The Capacitance Inductance Tester utilizes a high-speed microprocessor to simultaneously collect both the voltage signal and current signal from the tested components. It automatically calculates important parameters such as capacitance, inductance, and other related values. The on-site measurement of capacitors does not require disconnecting the wires, simplifying the testing process and significantly improving operational efficiency.After testing, the Capacitance Inductance Tester automatically calculates the capacitive value of each phase and other relevant parameters, enabling easy identification of capacitor quality changes and detecting potential faults in the connecting conductors between devices.

The Zinc Oxide Arrester Comprehensive Tester is used to check the electrical performance of zinc oxide arresters (MOAs). This instrument is suitable for on-site inspection of zinc oxide arresters at all voltage levels, as well as for factory testing and acceptance testing in the event of a power failure. By measuring parameters such as total current, resistive current, and others, it is possible to detect dangerous defects, such as internal insulation issues and valve aging in the zinc oxide arrester.

The HZ2613 Transformer Short-Circuit Impedance and No-Load Integrated Tester is the latest product launched by our company. The instrument uses a popular ARM processor with a 168 MHz main frequency and 128 MB of memory, expandable with a 4 GB memory card. It features a 7-inch HD color touch screen combined with the EmWin display interface, making the instrument user-friendly and easy to operate. The full touch-screen operation eliminates the need for a keyboard.
The instrument supports database functionality, and data can be exported via a USB drive or transferred to a background computer through a data cable.The circuit design of the instrument is highly refined, with a unique approach that provides superior performance, powerful functionality, compact size, and light weight. It can not only test the no-load parameters of the transformer but also measure the harmonic content and waveform. Additionally, the instrument can record transformer no-load test curves, providing a reliable basis for transformer fault analysis.

The lightning arrester is an important piece of electrical equipment in power networks, designed to protect power equipment from over-voltage. Normally, the operation of the arrester and the leakage current are monitored through an arrester monitor. However, due to poor sealing, the monitor may be exposed to water or moisture during operation, leading to internal component corrosion. In such cases, or for other reasons, the monitor's counter may fail to operate correctly, resulting in inaccurate leakage current readings. Therefore, according to The Regulations, the arrester monitor should be checked annually.
The reliability of the counter's operation is critical for the power system. It is an important parameter that records the number of lightning strikes received by the arrester during normal operation. This information provides a crucial basis for power system workers to inspect the arresters.

The handheld zinc oxide arrester tester is a specialized instrument used for field and laboratory testing of various electrical parameters of arresters. This instrument incorporates advanced technologies such as microcomputer sampling and control, and can measure parameters such as full current, third harmonic, resistive current, resistive current peak value, capacitive current, and active power of the zinc oxide arrester under power frequency voltage. It also displays the voltage and current waveforms and can print out test data.Equipped with a large-screen LCD display and Chinese-language menu prompts, the instrument enhances user interaction, making operation more intuitive. It also provides real-time waveform display on-site. The instrument features simple wiring, high measurement accuracy, and strong reliability. Its compact size, light weight, and integrated design make it easy to carry and operate in the field.

The Transformer Dielectric Loss Tester is a fundamental method for insulation testing that effectively detects overall damp deterioration and local defects in the insulation of electrical equipment. It is widely used in electrical manufacturing, equipment installation, handover, and preventive maintenance testing. Measuring the dielectric loss of transformers, mutual inductors, reactors, capacitors, bushings, and lightning arresters is a basic technique for assessing their insulation performance.
The dielectric loss tester has overcome the limitations of traditional bridge measurement methods by adopting frequency conversion power supply technology. It uses a microcontroller and modern electronic technology for automatic frequency conversion, mode/number conversion, and data processing. The tester features strong anti-interference capabilities, fast testing speed, high precision, automatic digitization, and easy operation.
The power supply uses a high-power switching unit that outputs pure sinusoidal waves at 45Hz and 55Hz. It also includes automatic voltage regulation, providing up to 10 kV of voltage. The tester automatically filters out 50Hz interference, making it suitable for large field tests in environments with high electromagnetic interference, such as substations.

The Transformer Dielectric Loss Tester is widely used in the power industry for testing transformers, mutual inductors, bushings, capacitors, lightning arresters, and other electrical equipment.

In the manufacturing process of transformers, including semi-finished product testing, factory tests for finished products, installation, overhauls, tap changer adjustments, handover tests, and preventive tests as required by the power department, it is necessary to measure the DC resistance and transformation ratio of the transformer. This testing can check the welding quality of winding joints, detect inter-turn short circuits in the winding, verify the contact quality of each position of the voltage tap changer, and ensure that the actual position of the tap changer aligns with the indicated position. It also helps identify issues like stock breaks.

Traditional testing methods require multiple wiring setups and interval tests using two separate instruments, which is time-consuming and inefficient, significantly delaying production progress.

To address the need for faster measurements of DC resistance and transformation ratios in transformers, our company has developed the HZ2162 DC Resistance and Transformer Turns Ratio Integrated Tester. This instrument features a one-time wiring setup, allowing both the transformation ratio test and high/low six-phase DC resistance tests to be completed without disconnecting the wires. All functions can be easily accessed and operated through a touch screen.

This instrument is specifically designed to address the challenges in the field measurement of high-voltage shunt capacitor banks in substations. It was developed based on national standards such as GB3983.2-1989 (High Voltage Shunt Capacitors), DL/T840-2003 (Technical Conditions for the Use of High-Voltage Parallel Capacitors), and JB5346-1998 (Series Reactors). The instrument is primarily used for measuring the reactive power compensation devices, including high-voltage shunt capacitor banks and reactors.

Equipped with a high-speed microprocessor, this instrument synchronously collects both the voltage and current signals from the test product. It then automatically calculates the equivalent capacitor and inductance values. There is no need to disconnect any wiring, simplifying the testing process and significantly improving work efficiency. After testing, the instrument automatically calculates the capacitance of each phase and other key parameters, making it easy to identify capacitor quality changes and detect faults in the connecting conductors between devices.

The Transformer CT PT Tester is a next-generation testing instrument for CT and PT, developed based on traditional transformer volt-ampere characteristic testers, ratio and polarity testers, and voltage regulators, voltage boosters, and current boosters. It was designed with extensive user feedback, thorough market research, and in-depth theoretical studies. The device features high-performance DSP and FPGA technology, advanced manufacturing processes, and ensures stable, reliable performance. It offers a complete range of functions, high automation, and high testing efficiency, making it one of the leading products in China. This instrument is a professional tool for testing transformers in the power industry.

The HZCT-100B CT PT Analyzer is a new product developed after extensively incorporating customer feedback and conducting in-depth theoretical research. It is based on the widely acclaimed FA Series Transformer Tester, produced by our company and widely used in the industry. The adoption of high-performance DSP and ARM technology, combined with advanced manufacturing processes, ensures stable and reliable performance. With a full range of features, a high degree of automation, and high efficiency, it is considered a leading product in China. The HZCT-100B is a professional testing instrument for transformers in the power industry.

To meet the fast measurement requirements of DC resistance in transformers, we developed the HZ-3110B DC Resistance Tester. The instrument features advanced technology, compact size, lightweight design, high output current, and other notable characteristics.

The device is controlled by a microcontroller, offering a high degree of automation and automatic discharge functions. It is a high-precision testing instrument that allows for simple and direct fast transformer measurements.

To meet the fast measurement requirements for DC resistance in transformers, we developed the HZ-3110 DC Resistance Tester. The instrument features advanced technology, a compact size, lightweight design, high output current, and other notable characteristics.The device is controlled by a microcontroller, offering a high degree of automation and automatic discharge functions. It is a high-precision testing instrument that allows for simple and direct measurement of transformer DC resistance.

To meet the needs for rapid DC resistance measurement of transformers, our company has developed the HZ-3120A DC Resistance Tester. The instrument incorporates advanced power supply technology and features a compact design, lightweight construction, high output current, excellent repeatability, strong anti-interference capabilities, and comprehensive protection functions. The entire system is controlled by a high-speed microcontroller, offering a high degree of automation along with automatic discharge and discharge alarm functions.

To meet the need for rapid measurement of transformer DC resistance, our company developed the HZ-3140A DC Resistance Tester. The instrument features advanced power supply technology, with characteristics including a compact size, lightweight design, high output current, excellent repeatability, strong anti-interference capability, and comprehensive protection functions.The entire system is controlled by a high-speed microcontroller, offering a high degree of automation along with automatic discharge and discharge alarm functions. The instrument provides high-accuracy testing, is easy to operate, and enables the rapid measurement of transformer DC resistance.