A sensor can give the same reading every time and still be wrong every time. With inverters and data centers adding high-frequency disturbances to the grid, how do you know your measurements are correct? Read more.
Oct. 26, 2026
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A protection relay trips on the same fault current reading every time. Most engineers read that as trustworthy. It shouldn’t be. A sensor can be repeatable and wrong at once, and more readings only make the wrong answer more confident. So how do you know a sensor is correct? Accuracy has to be checked against something outside the device. G&W Electric tests its Accusense™ sensors that way, cycling temperature and humidity to simulate 20-plus years in the field.
