Megger
Megger PAM410 Phase Angle Meter
Megger PAM410 portable phase angle meter for protection testing.
Megger PAM410 portable phase angle meter for protection testing. Phase angle is what directional and differential protection makes its decisions from, so measuring it is how a scheme is proven to be wired the way the drawings claim. A reversed CT connection is invisible to every other check and obvious to this one.
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