Products

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.

The intelligent DC high-voltage generator is designed to output negative DC high voltage with excellent voltage stability and high precision. It is an indispensable tool for preventive testing and DC insulation withstand voltage tests. This product is widely used in the preventive testing and scientific research conducted by power generation and power supply departments, power transmission and transformation engineering companies, as well as large factories and mines.

A megohmmeter is a commonly used and essential instrument in industries such as power generation, telecommunications, electromechanical installation and maintenance, as well as in applications where electricity is used as industrial power or energy. It is suitable for measuring the resistance values of various insulation materials, including insulation resistance for transformers, motors, cables, and electrical equipment. The insulation resistance is measured in megaohms (MΩ).

A megohmmeter consists of medium to large-scale integrated circuits. It has high output power, a high short-circuit current value, and multiple output voltage levels (each model typically offers four voltage levels).

An insulation resistance measuring instrument is used to measure the insulation resistance of electrical equipment. It is primarily used for the maintenance, testing, and inspection of insulation in electrical systems to ensure safety and reliability. The instrument measures the resistance of insulators, as most insulators in everyday life are not perfectly insulated. By applying high-voltage direct current to the insulator, the instrument can measure the current and calculate the resistance. The voltage typically used ranges from 250V to 1000V, and the acceptable insulation resistance is generally higher than 2 megaohms (MΩ).

The insulation resistance tester, also known as a digital insulation resistance tester, megohmmeter, or intelligent insulation resistance tester, is suitable for insulation testing in the maintenance, repair, testing, and calibration of various electrical equipment.

This instrument features a clear and uniform insulation resistance scale, simple operation, easy portability, low power consumption, a long service life, and a battery capacity check function. It is ideal for measuring the insulation resistance of transformers, mutual inductors, generators, high-voltage motors, power capacitors, power cables, lightning arresters, and other electrical devices.

An insulation resistance tester, also known as a megger, is a simple and commonly used direct-reading instrument for measuring high resistance. It is generally used to measure the insulation resistance of circuits, motor windings, cables, electrical equipment, etc. Its measurement unit is MΩ.
Megameters often use hand-cranked DC generators to provide power, typically offering 250V, 500V, 1000V, 2500V, and other types. The three most commonly used types in engineering are 500V, 1000V, and 2500V. Megameters also use transistor DC converters instead of hand-cranked generators to provide high-voltage power.

The insulation resistance tester, also known as a digital insulation resistance tester, megohmmeter, or intelligent insulation resistance tester, is suitable for insulation testing in the maintenance, repair, testing, and calibration of various electrical equipment.

This instrument features a clear and uniform insulation resistance scale, simple operation, easy portability, low power consumption, a long service life, and a battery capacity check function. It is ideal for measuring the insulation resistance of transformers, mutual inductors, generators, high-voltage motors, power capacitors, power cables, lightning arresters, and other electrical devices.

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 HZJB-II Single Phase Relay Protection Tester is a portable field testing device with excellent performance. It features an elegant, polished appearance with an aluminum alloy chassis and PC panel. Controlled by an ARM chip, the tester has an LCD screen that displays voltage and current outputs, as well as a stopwatch.

The instrument provides fully isolated outputs for adjustable AC/DC voltage, AC/DC current, and adjustable DC voltage. It also features double overload protection in the output loop, ensuring safety and reliability. With its high output capacity, small size, light weight, and high reliability, the HZJB-II is ideal for field calibration and testing of various relays.

The HZ-109S Primary Current Injection Tester adopts ARM chip technology for controlling output and a high-capacity toroidal transformer, and is equipped with an LCD display meter. It can simultaneously display primary current, secondary current, turn ratio, and the actuation time of the stopwatch connection (electric potential). The product features a sleek design, large output capacity, compact size, and lightweight construction, with an external aluminum alloy case and PC panel. It is primarily suited for CT turn ratio and contact resistance testing in power systems, as well as other applications requiring high current testing.

Adopted technology of ARM chip controlling output and toroidal transformer with high-capacity and equipped with LCD display meter, the HZ-109S2 Primary Current Injection Tester could simultaneously display primary current, secondary current and turn ratio. The product possesses the characteristics of nice appearance, large output capacity, small size, light weight and so on with external aluminum alloy case and PC panel. It is mainly suited for CT turn ratio and contact resistance tests of power system and other occasions needed high current test.

The HZ-5371L High Current Generator (referred to as the "current riser") is a test device developed by our company. It combines the advantages of similar products both domestically and internationally. Utilizing numerical control technology, it offers strong anti-interference capabilities. Compared to the previous generation of current risers, it features low power consumption, a large-capacity auto-regulator, and a high-permeability core converter, resulting in high output power, compact size, and lightweight construction.

The High Voltage Switch Dynamic Characteristic Tester is a specialized instrument used to measure the dynamic characteristics of high-voltage switches, such as circuit breakers, disconnectors, and load switches. These switches are critical components in power systems, and testing their performance is essential to ensure their reliability and efficiency in electrical distribution networks.

The HZ-5200 Contact Resistance Instrument is a high-precision digital switch detection device carefully developed in accordance with the IEC standard and the latest Chinese electric power execution standard DL/T 845.4-2004. The instrument uses high-frequency, high-power constant current switching power supply technology to measure micro-ohm contact resistance.