In work, power workers often need to test the incoming lines of high-voltage power cables to identify the resonance points of the cables, thus requiring the use of a series resonance test device, which is difficult to achieve the desired effect of the instrument. This article briefly introduces several main reasons for measuring the resonance point of a series resonance test device.
(1) Equipment wiring error. The series resonance test device mainly consists of four main components: the test host, excitation transformer, reactor, and voltage divider. The device must be connected to the tested cable. If the wiring is incorrect, not only can the resonance point of the cable not be measured, but also the resonance point of the cable cannot be measured. It can also easily affect the lifespan of the series resonance test device and even burn out the equipment between them.
(2) The equipment usage method is incorrect. When using the series resonance testing device, it is necessary to strictly follow the specifications. Users can choose between manual testing and automatic testing. Regardless of which type of testing is used, the correct parameters must be set before conducting point testing, and then the correct steps must be followed step by step. If the testing steps are not correct, it is difficult to achieve testing accuracy.
(3) The equipment cannot isolate radiation factors. In the operating environment of the series resonance test device, strong electromagnetic radiation interference is often encountered. If these radiation interferences are not eliminated beforehand, they will have a significant impact on the accuracy of the equipment, making it difficult to test the results, and users still need to test the radiation interferences. I don't know which step went wrong and wasted precious time.
Generally speaking, when power workers use a series resonance testing device, it is difficult to measure the resonance point if they do not pay attention to wiring issues, usage methods, external radiation issues, etc. Therefore, for these issues, users need everyone's attention.
