Products

The transformer winding deformation tester is designed for power transformers with a voltage rating of 6 kV and above, as well as other transformers with special purposes. Power transformers are susceptible to various faults, such as short-circuit currents and physical collisions, during operation and transportation. These factors can subject the transformer windings to high electro-dynamic forces, which may lead to a loss of stability. Such forces can cause permanent deformations, including local distortion, swelling, or dislocation, all of which can severely affect the safe operation of the transformer.To measure the deformation of transformer windings, the frequency response analysis method is used, in accordance with the national standard DL/T 911-2004 for the electric power industry. This method involves detecting the amplitude-frequency response characteristics of each transformer winding and comparing the results vertically or horizontally. Any changes in the amplitude-frequency response characteristics are analyzed to identify potential winding deformations.

This instrument utilizes high-frequency detection technology to measure partial discharge and integrates several advanced technologies, including computer technology, ultrasonic and radio frequency sensing, transient waveform sampling, analog electronics, high-speed signal acquisition, and digital signal processing. Developed on the Linux operating system platform, it provides both 2D and 3D maps of partial discharge, amplitude-phase spectrum waveforms, and discharge signal quantification values.By observing and analyzing the partial discharge pulse waveform—either statically or dynamically—over a single or multiple cycles, this instrument can thoroughly evaluate the partial discharge condition of electrical equipment. It is particularly suited for the routine inspection of the insulation performance of high-voltage cables, power transformers, and other electrical equipment.With its high sensitivity and strong adaptability, this instrument can effectively detect insulation defects and is an ideal tool for assessing the condition of power equipment during live operation.

The AC/DC digital kilovolt meter consists of two main parts: a high-voltage divider and a digital kilovolt meter. The high-voltage divider is a passive resistive-capacitive type, constructed with precision low-temperature drift resistors and high-quality capacitors. The digital kilovolt meter includes a true RMS value circuit, a peak value measuring circuit, and a digital voltmeter. The high-voltage divider is connected to the digital kilovolt meter by a coaxial measuring cable. The high voltage is reduced to a sample value by the voltage divider and is then fed to the digital voltmeter. Using the function selector, the voltmeter can display DC voltage, AC effective (RMS) voltage, AC peak value, and AC peak-to-peak value, offering high measurement accuracy and ease of use.

The Karl Fischer Coulomb titration method is the most reliable technique for detecting trace moisture in various substances. This method has been successfully implemented by the trace moisture titrator. Notably, the instrument operates with increased reliability and convenience, thanks to the use of advanced control circuits, a 32-bit embedded microcontroller as the core processing unit, and an embedded mini operating system. Characterized by fast analysis speed, simple operation, high precision, and strong automation, the trace moisture titrator is widely used in industries such as petroleum, chemicals, power, railways, pesticides, pharmaceuticals, and environmental protection.

The hand-held contact resistance tester is an innovative product designed for ease of use. It features a compact, portable design, with hand-held operation and battery power supply, making it easy to carry and use in various locations.This device is primarily used for measuring contact resistance and other low resistance values in switch contacts. It offers fast testing speed and high accuracy, making it an ideal tool for precise measurements.

The hand-held Loop Resistance Tester is a high-precision, digital switch detection instrument developed by our company in accordance with the IEC standard and the latest electric power industry standard of the People's Republic of China, DL/T845.4-2004.This instrument utilizes high-frequency, high-power constant current switching power supply technology, enabling it to measure micro-ohm level contact resistance. It is widely used for measuring contact resistance in switches, electrical appliances, circuit resistance, cable wires, and welding line connections.
The instrument offers accurate and stable measurement data, making it ideal for use in high-voltage switch maintenance and circuit resistance testing, as required by power and electric supply departments. The output current and measured resistance are displayed simultaneously on a 7-inch high-brightness color LCD touch screen.Additionally, the measurement results can be output to a printer or stored on a USB drive. The power-off storage function ensures that data can be queried and retrieved at any time.

The HZ-3521A Three-Phase Watt-Hour Meter Field Calibrator is specifically designed for on-site inspection of high-voltage power grid metering devices and fault detection. The instrument utilizes high-precision internal transformers and clamp-type transformers for sampling, allowing operators to quickly, safely, and reliably measure meter recording errors and wiring faults. It provides an effective tool for power system inspectors to detect electricity theft, identify metering device failures, and ensure accurate measurement, ultimately helping to recover lost electricity.
The HZ-3521A Three-Phase Watt-Hour Meter Field Calibrator is equipped with a high-performance ARM processor running at a main frequency of 168 MHz, and features 128 MB of memory, expandable with a 4 GB memory card. The instrument is equipped with a 7-inch HD color touch screen that utilizes the emWin display interface, offering a user-friendly and intuitive interface. It operates entirely via the touch screen, eliminating the need for a keyboard. Additionally, the instrument supports a file system that allows seamless integration with a computer.

Transformer DC resistance testing is essential during various stages of transformer manufacturing and maintenance, including factory testing of semi-finished and finished products, installation, overhaul, tap changer replacement, handover testing, and preventive maintenance in the power sector. This test helps evaluate the welding quality of winding joints, detect short circuits between turns, and verify the functionality of the voltage tap changer contacts. It also checks the alignment of the actual tap changer position with the indicated position, the integrity of lead wires, and the condition of multi-strand wires, including the detection of any breaks in the strands.The tester is controlled by a high-speed microprocessor, ensuring high automation with functions such as automatic discharge and discharge alarms. The instrument provides high test accuracy, is easy to operate, and allows for rapid measurement of transformer DC resistance, making it an indispensable tool for transformer testing.

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 design team of the high voltage switch circuit comprehensive tester has many years of field experience and a deep understanding of the actual working conditions. Through careful hardware design and software optimization, they have developed a targeted solution. While retaining the capability to perform individual tests, the system introduces an innovative intelligent testing mode. This mode not only meets the testing needs on-site but also significantly simplifies wiring and operation. Additionally, it features real-time voice prompts and wireless control of intelligent devices, making the testing process more streamlined, convenient, and efficient.

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.