Industry News

• AC Hipot Tester Capacity: How to Calculate kVA Matrix & Avoid Overpaying

  How to select the capacity of a power frequency withstand voltage test device? This article analyzes the kVA calculation formula under the IEC/IEEE standard, provides a quick reference table for capacity selection of test objects such as 10kV to 110kV cables and transformers, and compares and analyzes the overseas 60Hz and domestic 50Hz environments to help you accurately match equipment, avoid blindly leaving margins, and truly save on procurement costs.

  Industry News July 30, 2026
• Circuit Breaker Test, CT Calibration & Heat Run – SLQ Series High Current Injector

  High-current testing is no longer simply a matter of "big enough."Many people on the front lines of power commissioning hold a long-standing misconception: that as long as a high-current generator's output current value meets the standard, it can successfully complete on-site testing and pass projec

  Industry News July 22, 2026
• CT/PT Testing of Modern Data Centers And New Energy Stations: How Can Low-voltage Frequency Conversion Method Solve Practical Problems on Site?

  Nowadays, the newly built AI computing power data center distribution rooms and integrated photovoltaic and energy storage stations generally suffer from the problem of dense equipment layout. The cabinet is packed with various protective relays and intelligent acquisition terminals, but periodic pe

  Industry News July 14, 2026
• Ultimate Guide To VLF Ultra-Low Frequency Withstand Voltage Testing: Principles, Standards, And Equipment Selection

  Insulation withstand voltage testing is the core of preventative testing for medium and high voltage power equipment such as XLPE cables, generators, and large motors. Traditional 50Hz power frequency withstand voltage testing requires a large capacitive load, resulting in bulky equipment; while DC

  Industry News July 07, 2026
• Is There A Total False Alarm in Circuit Breaker Testing? How To Block Data Bias From The Source with GDGK-307

  When testing circuit breakers on site, the biggest fear is not discovering faults, but rather the instrument itself falsely reporting military information. Although the switch action is normal, the instrument reports exceeding the travel limit and non compliant synchronicity; Or the detected object

  Industry News June 30, 2026
• How To Choose The Right Transformer Oil Filtration Equipment for Substation Maintenance?

  Transformer oil inevitably absorbs moisture, gas, and particulate impurities during long-term operation. These contaminants severely reduce the oil's insulation performance, thereby weakening the transformer's internal insulation strength. When insulation performance drops to a critical value, it m

  Industry News June 23, 2026
• TTR Test Data Inconsistent? Repeated Wiring Reducing Efficiency? GDBC-901B Battery-Powered Version Offers A Field Solution

  When conducting transformer turns ratio and group tests in the field, several common problems repeatedly arise: single-phase phase-by-phase testing requires separate measurements of phases A, B, and C; slight differences in contact resistance during the three wiring operations can reduce the lateral

  Industry News June 17, 2026
• What is the difference between resistive voltage divider and capacitive voltage divider?

  Resistive Voltage DividerThe internal resistance of the high-voltage resistance divider is pure resistance, with simple structure, convenient use, high accuracy and good stability, and is widely used. The resistive voltage divider is not suitable for measuring higher AC voltage, because it is relate

  Industry News August 01, 2022
• What are the factors that affect the measurement error of the current transformer CT?

  The measurement error of the transformer is related to the impedance of the secondary circuit. The increase of the impedance will increase the error, and the accuracy will decrease. Therefore, the external impedance is a key factor in determining the exact level at which the current transformer oper

  Industry News April 21, 2022
• What should we do if the breakdown voltage of the transformer oil is unqualified?

  If the breakdown voltage of the transformer oil is unqualified, it means that the quality of the transformer insulating oil has deteriorated.At this point, we need to conduct a comprehensive analysis through various experiments and operation records. If there is no obvious impurity, color change, an

  Industry News March 29, 2022