Power Quality Analysers

Power quality analysers help you measure voltage, current, power factor, harmonics and demand so you can cut costs and improve reliability. Looking for selection tips? Jump to the buying guide ↓

Power Quality Analysers — Buying Guide

What a Power Quality Analyser Measures
  • RMS voltage/current, power (P, Q, S)
  • Energy (kWh, kvarh, kVAh)
  • Power factor, cos φ, tan φ
  • Harmonics: THD and spectra up to the 50th
  • Events: sags, swells, unbalance, overloads
Common Applications

NEC 220.87 load studies: Establish 15-minute maximum demand and capacity headroom.

Energy audits: Profile consumption, verify billing, spot PF penalties.

Predictive maintenance: Detect harmonics, imbalance and PF issues early.

Renewables & distribution: Monitor PV, wind and hybrid systems efficiently.

How to Choose the Right PQA
  • Phases: Single/split vs three-phase
  • Speed: 200 ms trends with multi-month SD logging
  • Access: Tamper-proof logging (PEL-112) vs on-site LCD (PEL-113)
  • Environment: Indoor vs rugged IP67 outdoor (PEL-115)
  • Connectivity: USB, Ethernet, Wi-Fi, DataViewSync™
Compare Featured Models

PEL-112: Tamper-proof long-term logging.

PEL-113: On-site LCD plus logging.

PEL-115: Rugged IP67 outdoor, 4V/4I inputs.

FAQs

PQA vs energy logger? PQAs add harmonics, PF and event diagnostics.

How long to log? Several days to weeks for representative peaks.

When to choose IP67? For outdoor/substation/renewable environments — see PEL-115.

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