Technology Class

Relay protection test instruments guarantee the proper function of relay devices in power systems. Abnormal issues can affect test accuracy and cause device damage. This article explores these problems and solutions.

DC high-voltage generators play an indispensable role in power cable testing. This article will deeply explore the five major functions of DC high-voltage generators in cable testing, as well as their key position in ensuring cable quality and safety.

The ultra-low frequency withstand voltage generator is an indispensable test equipment in the power system, which is used to ensure the reliability and safety of electrical equipment under ultra-low frequency voltage. This article introduces in detail the use, precautions and maintenance of the ultra-low frequency withstand voltage generator, aiming to help users conduct withstand voltage tests safely and effectively.

In the maintenance and fault prevention of power systems, loop resistance testing plays a vital role. This article aims to deeply explore the necessity of loop resistance testing and comprehensively introduce various testing methods to provide professional guidance for the management and maintenance of power equipment.

With the continuous development of society, the capacity of power equipment is getting larger and larger, so the performance requirements for its insulation part are higher. Some traditional conventional megohmmeters can no longer complete high-requirement insulation tests. Nowadays, the insulation resistance tester is more commonly used. So what should we pay attention to when using this instrument? Let me explain it to you below.

With the complexity and intelligence of power systems, the accuracy and reliability of relay protection devices have become particularly critical. As the core tool for detecting the performance of these devices, the functionality and accuracy of microcomputer relay protection testers are crucial to the safe operation of power systems. The following is an in-depth analysis of the fault content that microcomputer relay protection testers can detect:

Relay protection testers play a vital role in the maintenance and protection of power systems. They are used to detect and verify the accuracy and reliability of relay protection devices, ensuring timely and effective protection when power system failures occur. The following is a detailed analysis of the differences between single-phase, three-phase and six-phase relay protection testers to help professionals choose the right test equipment based on specific application needs.

Relay maintenance equipment is required to respond to faults and abnormal operating conditions of electrical equipment, automatically, quickly and selectively act on circuit breakers, remove faulty equipment from the system, ensure that fault-free equipment continues to operate normally, and control the scale of accidents to a minimum, improve the reliability of system operation, and maximize the safe connection of power supply to users.

Due to different test methods, the internal resistance of the battery is divided into DC internal resistance and AC internal resistance. DC internal resistance is the battery internal resistance measured by the instantaneous DC discharge method, and AC internal resistance is the battery internal resistance measured by the AC injection or discharge method.

The DC high-voltage generator uses medium-frequency rectification and filtering technology to solve the shortcomings of large ripple coefficient and unstable waveform of the power frequency DC high-voltage generator. It is widely used in DC withstand voltage test and leakage current test of electrical equipment, and is specially equipped with the function of testing the voltage U1mA under 1mA and the leakage current under 0.75U1mA of the zinc oxide lightning arrester.