Case Studies

Fluke. Keeping your world
up and running.
Fluke Corporation
PO Box 9090, Everett, WA USA 98206
Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands
For more information call:
In the U.S.A. [phone] or
Fax [phone]
In Europe/M-East/Africa [phone] or
Fax [phone]
In Canada (800)-36-FLUKE or
Fax [phone]
From other countries [phone] or
Fax [phone]
Web access: http://www.fluke.com
©2006 Fluke Corporation. All rights reserved.
Printed in U.S.A. 4/2006 2646562 A-EN-N Rev A
4 Fluke Corporation Tips for learning power quality analysis
Check your connections
on a three-phase system
One of the most common
mistakes people make
in checking three-phase
systems is incorrectly
connecting their instrument.
It can take nine connections
to measure a wye system,
so it can be easy to swap
leads or forget to make a
connection. The 434 uses
color coding on leads and on
the display. This will help,
but it’s best to check the
phasor display to confirm
your connections. The
figures below show phasor
diagrams for correct and
incorrect connections.
Delta correctly connected.
Wye with B and C current reversed.
Wye correctly connected.
Wye with B and C volts reversed.