Best Practices for Electrical Power Quality

Best Practices for Electrical Power Quality (PQ-116)

DSPS Course ID # [1 hour tutorial]

This one (1) hour tutorial teaches participants how the implementation of some industry best practices will help them to avoid the most common power quality problems. The program covers a range of power quality disturbances, including: sags, swells, transients, power factor, harmonic distortion and supra-harmonics. This tutorial includes examples for motors, drives, LED lighting and renewable energy inverters.

Upon completion of this course, students should have a general understanding of the ways they can avoid electrical power quality problems.

Introduction (5 minutes)

1. AC motors (15 minutes)

a. Balance voltages

b. Maintain low harmonic distortion

c. Improve power factor

2. AC motor drives (VFDs) (15 minutes)

a. Line reactors

b. Inverter duty motors

c. Load reactor or sine wave filter

d. Bearing protection

e. VFD cable

3. Harmonics (10 minutes)

a. < 2% THD-v; < 5% THD-i

b. Low distortion VFDs

c. Passive harmonic filters

d. Active harmonic filters

4. Facility voltage disturbances (5 minutes)

a. Minimize motor inrush currents

b. High (> 95%) PF

c. Transformer loading

d. Excess capacitance

e. On-line vs. Off-line UPS

5. Transients (5 minutes)

a. Lighting arrestor

b. Transient voltage surge suppressors (TVSS)

c. Capacitor switching transients

d. Low impedance grounding

6. LED lighting (5 minutes)

a. Total power factor

b. Harmonic distortion

7. Renewable Energy inverters (5 minutes)

a. Supra-harmonics

b. PQ Filters

Brought to you by Power Quality Specialists @ Allied Industrial Marketing, Inc.