Loop impedance test
Each circuit must be tested to ensure that the actual loop impedance does not exceed...
April 2026
Megohmmeter accuracy
It is important to use megometers to provide correct measurements. Knowing what these measures mean...
Use of transformer dc resistance tester
Power workers often need to test the resistance value of high-voltage cables, power transformers and...
Use of dry test transformers
The dry test transformer, together with the oil immersed test transformer and the gas filled...
How to choose the type of dc resistance tester?
During the test of the microcomputer relay protection tester, the occurrence of interturn and interphase...
Usage and precautions of clamp ammeter
The clamp ammeter is an instrument that integrates the current transformer with the ammeter. Its...
How about the dielectric loss tester?
Dielectric loss: energy loss caused by dielectric conductivity and hysteresis of dielectric polarization under an...
Overheat treatment of resistance tester
The insulation resistance tester is a kind of transformer dc resistance tester which is small...
Ground resistance detector reading
(1) in the detection of gas and liquefied petroleum gas station and high-rise buildings and...
Why contact resistance testing?
The contacts in the circuit breaker need to be checked periodically to ensure normal operation...