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We refer to regulated AC power supplies as being “CFCV”, or “constant voltage, constant frequency”. Unlike most devices in their class, which operate on a fixed volts-per-hertz ratio, Kikusui’s regulated AC power supplies for device testing allow output parameters to be varied at will.

In this column, I’ll explain what causes transformers to produce current spikes, and how to configure testing equipment to prevent such spikes from arising.

Reproducing High-Voltage Three-Phase AC Waveforms Observed Onsite On-site equipment malfunction is a common occurrence. Malfunctions have a variety of causes, including common mode or differential (normal) mode noise across power supply lines and power fluctuation. When equipment does malfunction, the first response should be to log the output waveforms of the power supply lines on…