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Your Free
Power Quality
Reference Ruler
PMI's PQ Ruler packs essential power quality formulas, IEEE industry standard limits, ITIC & CBEMA tolerance curves, and engineering reference material into a durable 6″ ruler — ready for fieldwork or your desk.
PQ Formulas
IEEE Standard Limits
ITIC / CBEMA Curves
Voltage Sag & THD
Handy 6″ Format
White Paper
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6"
Ruler Length
100%
Free — No Cost
2
Sides of Data
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Addresses Only
Explore the PQ Ruler
Every formula, curve, and table on the ruler, up close. Tap any point to zoom in and read what it is, and click the ruler to flip to the other side.
Every formula, curve, and table on the ruler, front and back. Tap to flip between the two sides.
Click the ruler to flip • Tap a dot for details
Tap the ruler to flip
Power Quality Formulas for voltage sag, THD, unbalance, flicker, and more, ready for rapid field reference.
IEEE Industry Standard Limits from IEEE 519, 1159, and related standards in one compact format.
ITIC & CBEMA Tolerance Curves to see at a glance whether a voltage event falls within acceptable limits.
Engineering Reference Material compact enough for a toolbox and detailed enough to be useful on-site.