Technical
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How to select an appropriate microcomputer protection device
The rapid development of computers has naturally led to the flourishing of microcomputer protection devices. The wide application of computers has brought significant impacts and challenges to the field of microcomputer protection. The design, research, and development of relay protection have be...Read more -
Differences in Applications between Transformer Comprehensive Tester and Test Bench
Transformers, as core equipment in power systems, require continuous evaluation and testing of their electrical performance throughout their entire lifecycle—from manufacturing and installation to operation and maintenance. As industry demands for testing efficiency and accuracy continue to rise,...Read more -
Key points of the test procedure for the three-times-frequency induction withstand voltage test device
In the insulation test system of power equipment, the external applied voltage test mainly assesses the main insulation, including the insulation between the windings and the ground, as well as the insulation between the windings. However, there are limitations in evaluating the longitudinal insu...Read more -
The differences and advantages between isolation transformers and ordinary transformers
In recent years, the isolation transformer, as a type of transformer with relatively safe properties in the power industry, has seen rapid development in its production technology. Due to its excellent product performance, it is being used in an increasingly wide range of fields and areas. People...Read more -
The advantages of the variable-frequency series resonance products
Since the discovery and use of electricity in the 18th century, various electrical appliances have been invented one after another. However, different electrical devices require different types of power sources; some need direct current while others need alternating current. Moreover, in many ind...Read more -
The usage steps of the switch characteristic tester
The switch characteristic tester can conduct mechanical performance tests on electromagnetic and circuit breaker devices. The detection of the switch characteristic tester is highly scientific and the detection parameters are accurate. After evaluation, it can comprehensively understand the mecha...Read more -
Caution: Risks of Induced Voltage when Using Ground Resistance Tester
The ground resistance measuring instrument consists of a self-provided 110-115Hz AC power supply (hand-cranked generator or electronic power supply) and a potentiometer-type measuring mechanism. The main accessories of the ground resistance measuring instrument are three measuring wires and two m...Read more -
Important points to note during the test of high-voltage test transformers
Precautions for high-voltage tests: (1) When conducting high-voltage tests, at least two people or more should participate. Clearly define the division of labor, establish communication methods among each other, and appoint a person to monitor the safety on site and observe the test status of the...Read more -
Pay attention to the protection against electromagnetic interference when using relay protection tester
When using the microcomputer relay protection tester, measures for electromagnetic interference protection must be taken. During the test process in the substation, when replacing electromagnetic-type protection with microcomputer-type protection, the microcomputer relay protection tester must ad...Read more -
Key equipment types and selection points for cable withstand voltage tests
The cable withstand voltage test is the core detection method for evaluating the insulation performance and operational reliability of cables. Its purpose is to assess the reliability of the product under working voltage and identify severe defects in the insulation by applying a voltage value hi...Read more -
Safety Test Precautions for Series Resonance Test Equipment Used in Substations
The dedicated series resonance test device for substations is mainly designed and manufactured for the planning of AC withstand voltage tests for primary electrical equipment of substations with a voltage of 220kV and below. It can meet the AC withstand voltage tests and tests for capacitive equi...Read more -
Several common types of test voltages for electrical system equipment testing
The insulation structure of the power system must undergo tests for impulse voltage and power frequency voltage, and it is required to have sufficient margin to ensure the safe operation of the power system. After numerous experiments and studies, it has been shown that for power system equipment...Read more