Articles

Benefits of Power Analysis

Power Analysis Detects Subtle Faults in Products Power analysis is essential to quality assurance in production testing for a wide variety of electrical products.  Power analysis (including harmonics and %THD) of a product is an excellent quality indicator of product performance, especially when compared to an identical model. For example,…
austin
November 12, 2018
ArticlesFundamentals of Power Management

AC-DC Current Shunts vs. Current Transformers

Although all Valhalla wattmeters are compatible with general purpose current transformers, there are distinct accuracy and bandwidth advantages to using a current shunt when making a power measurement. Current shunts generally provide greater accuracy over a broader frequency range than current transformers (CT's). Rather than measure actual in-series current flow,…
austin
November 12, 2018
ArticlesFundamentals of Power Management

Watts Converters

For Distorted Waveshapes of All Types The success of the Valhalla 2100 series wattmeter design is centered around a four-quadrant multiplier. The significance of the four quadrant theory is to provide a proper computation for watts under any phase relation between voltage and current to ensure that indeed EI cos…
austin
November 12, 2018