Earthing resistance measurement of earth grid
Large-scale grounding grid grounding resistance tester is suitable for testing the power frequency ground impedance,...
2026
hvhipot Disadvantages of loop resistance tester in testing
The loop resistance tester designed according to the conventional design principle found that there is...
Precautions for megohmmeter
Note for megohmmeter: 1. Before measurement, perform an open circuit and short circuit test on...
The role of different ground resistance testers
The grounding resistance tester is based on Ohm’s theorem and adopts the fHV Hipot Electric...
Transformer 5 times impact test
The reasons why a new transformer or a transformer after an overhaul should undergo an...
Preparation for measuring insulation resistance
When the measured object is connected to the power supply, it should be taken out...
Troubleshooting of High Voltage Test Transformer
Common faults of oil-immersed transformers in operation include windings, bushings, tap changers, iron cores, fuel...
How to solve the failure of loop resistance tester
Common faults and solutions of loop resistance testers: 1. Failure phenomenon one The test current...
Resistance, current, voltage relationship
The relationship between resistance, current and voltage, then we should understand what Ohm’s law is....
Calibration method of megohmmeter
Calibration method of megohmmeter: 1. Impedance bridge with 1% accuracy in the range of 103...