TESCO Catalog 2025

Catalog No. 646 TESCO Phase Angle Meter

The TESCO Catalog No. 646 Phase Angle Meter is a self-contained portable device which requires no auxiliary equipment for its operation. It furnishes a quick and direct method of checking relay and instrument connections. The TESCO Phase Angle Meter shows the angular relationship between one voltage and one current and is useful in switchgear (generator synchronizing) and metering (Power Factor) applications. The unit can also be used to measure the prevailing power factor in each phase of a polyphase watt-hour meter installation. Features: • Input powered—no batteries • Rugged construction for field use • Panel Display, viewable from a distance • Ease of determining changing phase relationship Variants: • Voltages from 15 - 480 VAC • Currents 1 to 10 Amp Taps • Custom inputs available

PHASE ANGLE METER CATALOG NO. 646

TESCO Metering 925 Canal Street · Bristol, PA 19007 · Phone: 215.228.0500 tescometering.com

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