Products

Internationally, conductivity and internal resistance testing have become widely used in the daily maintenance of batteries, replacing the traditional voltage inspection method. Since conductivity or internal resistance reflects the internal condition of the battery, it has been recognized as a critical parameter for accurately and quickly assessing the health of a battery.

The battery conductance or internal resistance tester is a digital, multifunctional portable device designed to quickly and accurately measure key battery operating parameters. The tester can display and record important data such as battery voltage, conductance or internal resistance, and connecting strip resistance through online testing, allowing for a precise assessment of the battery’s condition. When connected to a computer and specialized battery data analysis software, it forms an intelligent testing system that tracks the battery's performance over time. The system can provide advance warnings of potential issues, enabling engineering and management personnel to take appropriate action for maintenance and management.

The battery internal conductance tester uses a color resistance touch screen. The instrument can be operated by finger or stylus, making it flexible and convenient. It is a digital, multifunctional, portable tester designed for fast and accurate measurement of battery operating parameters. The instrument can detect the voltage, impedance, or conductance of a single battery online, store and process the detected data, issue alarms for battery failure, and accurately distinguish the condition of the battery. The instrument allows for saving, querying, deleting, and exporting test data. The upper computer software analyzes and displays the test data through various charts and automatically generates a battery test report.

The HZRC series of Pincers Earth Testers is widely used for measuring grounding resistance in power, telecommunications, meteorology, oilfields, construction, and industrial and electrical equipment.When measuring a grounding system with loop current, does not require disconnecting the grounding wire and does not need an auxiliary electrode. It is safe, fast, and easy to use.The HZRC series of Pincers Earth Testers can detect faults that are beyond the reach of traditional methods and can be applied in situations where traditional methods are not effective.

Dielectric damage measurement is a fundamental method in insulation testing, which can effectively detect both overall damp deterioration of electrical equipment insulation and localized defects. It is widely used in electrical manufacturing, electrical equipment installation, handover, and preventive testing. The dielectric damage measurement of transformers, reactors, capacitors, casings, and lightning arresters is the most basic method for assessing their insulation performance.

This method breaks through the traditional bridge measurement technique by using frequency conversion power supply technology, a microcontroller, and modern electronic technologies for automatic frequency conversion, analog/digital conversion, and data processing. It offers fast testing speed, high accuracy, automatic digital operation, and ease of use. The power supply utilizes a high-power switch, outputting 45Hz, 50Hz, and 55Hz pure sine waves with automatic voltage regulation, providing up to 500V. An automatic filter eliminates 50Hz interference, making it suitable for substation electromagnetic interference field tests.

It is widely used in the power industry for testing transformers, reactors, casings, capacitors, lightning arresters, and other equipment.

The device is a new generation of innovative CT and PT testing instruments, launched after extensive market research and certification by strict professional testing and certification authorities. The device adopts a high-performance processor and microcomputer control architecture, along with advanced manufacturing technology, ensuring stable and reliable product performance, complete functions, high automation, and high testing efficiency. It is a leading product in the domestic relay protection and high-voltage insulation industry for testing current transformers (CT) and voltage transformers (PT).

The Transformer Volt-Ampere Characteristics Comprehensive Test Instrument is a fully automated CT and PT testing device. It can perform tests such as the CT and PT volt-ampere characteristic test, CT and PT polarity test, CT and PT ratio and polarity ratio test, automatic calculation of arbitrary point CT error curves, and analysis of CT/PT ratio discrepancies. The instrument can automatically collect, analyze, store, and print test data, and the data can also be stored on a USB drive.

Additionally, the monitor features an 8-inch color screen with a high resolution of 800x600, full-touch operation, and real-time display of test curves. This allows operators to immediately observe test results and identify any potential issues. The test report not only displays the test curve but also lists the test data in the preferred numerical order, including test time and print time, making it suitable as the original test data.

This product is ideal for field testing and calibration of various CTs and PTs due to its large output capacity and comprehensive functionality.  

The transformer short-circuit impedance tester uses a popular ARM processor with a 168MHz main frequency and 128MB of memory, which can be expanded with a 4GB memory card. The instrument features a 7-inch high-definition color touch screen and employs the EmWin display interface, making the user interface intuitive and easy to operate. It can be fully operated via the touch screen, eliminating the need for a keyboard.

The instrument supports a database and allows data export via a USB flash drive or transmission to a background computer through a data cable.

The circuit design of the instrument is both elegant and innovative, providing superior performance, powerful functionality, compact size, and lightweight construction. In addition to testing the impedance load parameters of the transformer, the instrument can also measure harmonic content and waveforms on-site. With its user-friendly operation, the instrument offers a reliable foundation for transformer parameter analysis.  

The Transformer LV Short-Circuit Impedance Tester is designed for use in LV load impedance testing during delivery, overhaul, trial tests, and handover tests of power transformers (both single-phase and three-phase).

It measures the short-circuit impedance (%) of the power voltage on-site and compares it with the value indicated on the nameplate or the factory default. This helps identify any defects, such as winding displacement or deformation, which may result from major failures during transportation, installation, or operation after the delivery test. (A significant change in short-circuit impedance is considered if it exceeds ±3%, as specified in the China International Conference on Electricity Distribution 2000 (“CICED 2000”)).

The Transformer LV Short-Circuit Impedance Tester does not require an external voltage regulator and uses a primary connection mode. Once the parameters are entered, the tester automatically begins the three-phase testing, calculates the impedance error percentage, and provides intuitive results. This is a rapid and efficient tester for detecting winding deformation in transformers on-site.

The HZ-A50 trolley-type cable fault tester is a cable fault testing system that our company has been dedicated to developing for many years in the field of power cable fault detection. To meet the rapid development of the power industry, and based on extensive experience and focused research, we have seamlessly integrated traditional and advanced cable fault testers, high-frequency and high-voltage power supplies, multiple pulse generators, path transmitters, insulation resistance testers, and other standalone units into one unified system. This system is used for both preliminary testing and fault location in power cables, offering precise fault identification. The testing software automatically detects the card position and reads the fault distance, making the cable fault testing process lightweight, simple, efficient, and safe. It provides convenience for the rapid detection of power cable faults.

The secondary defect elimination tester HZJB-1700 is controlled by a microcontroller, which makes it simple to use and convenient to carry. It can be used to test the action values and time of AC relays. Additionally, it can test the protection functions of low-voltage microcomputer-based line protection systems, such as re-pressurization blocking, direction overcurrent, zero-sequence overcurrent, low-cycle load reduction, and full transmission protection of high-voltage microcomputer-based line protection. The tester can also be used to check the start value, quick-break value, and second harmonic inrush blocking value for the differential protection of microcomputer-based transformers.

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.