Unquestionably, the IEC60255-5 industry-established standard prescribes the stringent prerequisites necessitated by impulse voltage test generators utilized in exhaustive electrical apparatus validation. Of particular note within these generators is their yield resistance, a pivotal factor determining the precision and dependability of the ensuing results ascertained through testing. Special attention should be drawn to the fact that both impedance values touted for the tested impulse voltage generators are 2Ω and 500Ω±10％ respectively. This discourse endeavours to dissect the vital significance of this stipulated specification by elucidating four fundamental stipulations implicated therein.
Firstly, the paramount objective of an impulse voltage test generator is to generate precise and uniform test voltages. Herein, the aforementioned output resistance serves as a fulcrum affecting the accuracy of the genesis voltage. Rest assured, the prescribed impedance levels affirm the generator’s capability to uphold a steady and precise output irrespective of the load applied.
Subsequently, load impedance harmonization takes precedence for the efficacious execution of tests. The proposed resistance values of 2Ω and 500Ω±10％ optimally supplement the selection of suitable load impedances, thereby guaranteeing optimum performance and mitigating signal reflections.
Thirdly, the output resistance influences the power competency of a generator. As evident from the specification, a lower output resistance (2Ω), enables the generator to accommodate elevated power levels, rendering it apt for testing scenarios with substantial current demands. Conversely, the elevated output resistance of 500Ω±10％ offers superior power management for low current applications.
Lastly, test system compatibility is of paramount importance. The mandated impedance values need to align seamlessly with the employed test system encompassing test accessories such as oscilloscopes, power supplies, and load banks along with the entirety of the test configuration. Such conformity substantially bolsters reliable and replicable result acquisition in testing.
Detailed analysis of these requisite elements is presented below:
1. Precision
