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Spinlab Utility Instrumentation | CT Demagnetization


CT Demagnetization


"Now, without taking anybody out of service, you can fix a magnetized CT in less than one minute!"

Many of you have measured ratio test reading of a CT that was not what it should be: For Example, a 200:5 CT that measured out to be 212:5 but passed the burden test. This is a magnetized CT. And what can you do about it? Either nothing or change the CT. Now there is a 3rd option: The Spinlab Demag Circuit used in tandem with the Bird Dog Plus.

Of the 32 failure modes of a meter circuit, magnetized CTs are by far the most common ones after installation errors. A magnetized CT can be caused by a lighting strike, ground fault, or open circuiting a CT

Spinlab 600-DMG1 CT Demagnetization Circuit

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