High voltage SiC based calculable impulse voltage calibrator
Stephan Passon, Florian Schilling, Hendrik Asmer, Johann Meisner, Frank Gerdinand · IET conference proceedings. · 2024
The calibration of measuring systems for high voltage lightning impulses and high switching impulse voltages is regulated by the IEC 60060 and IEC 61083 series of standards. In the case of the calibration of transient recorders, so-called impulse calibrators have been available for decades, which are designed as calculable voltage sources for double-exponential voltage waveforms up to an amplitude of several hundreds of volts. The calibrators available on the market have an RLC network and fast relays for generating standardised lightning and switching impulse voltages. However, these calibrators are not well adapted to the transient recorders on the market today, which can measure up to 2000 V. In addition, the used relays contain mercury and therefore are not easily available as well as toxic. This paper describes the design, construction, and feedback of a new impulse voltage calibrator for impulse voltages up to 2000 V. This calculable impulse voltage source has the advantage of being "Silicon Carbide Metal Oxide Semiconductor Field-Effect Transistors" (SiC MOSFET) based. Furthermore, this calibrator has all common lightning and switching impulse voltage shapes.