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Doc# E151701 i
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Nexus® 1262/1272 Meter Installation and Operation Manual Version 1.21
Published by:
Electro Industries/GaugeTech
1800 Shames Drive
Westbury, NY 11590
All rights reserved. No part of this publication may be reproduced or transmitted in
any form or by any means, electronic or mechanical, including photocopying, record-
ing, or information storage or retrieval systems or any future forms of duplication, for
any purpose other than the purchaser's use, without the expressed written permission
of Electro Industries/GaugeTech.
© 2015 Electro Industries/GaugeTech
Nexus® and Shark® are registered trademarks of Electro Industries/GaugeTech.
Communicator EXTTM is a trademark of Electro Industries/GaugeTech.
Modbus® is a registered trademark of Schneider Electric, licensed to the Modbus
Organization, Inc.
Doc# E151701 ii
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
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Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Customer Service and Support
Customer support is available 9:00 am to 4:30 pm, Eastern Standard Time, Monday
through Friday. Please have the model, serial number and a detailed problem descrip-
tion available. If the problem concerns a particular reading, please have all meter
readings available. When returning any merchandise to EIG, a return materials
authorization number is required. For customer or technical assistance, repair or
calibration, phone 516-334-0870 or fax 516-338-4741.
Product Warranty
Electro Industries/GaugeTech warrants all products to be free from defects in material
and workmanship for a period of four years from the date of shipment. During the
warranty period, we will, at our option, either repair or replace any product that
proves to be defective.
To exercise this warranty, fax or call our customer-support department. You will
receive prompt assistance and return instructions. Send the instrument, transporta-
tion prepaid, to EIG at 1800 Shames Drive, Westbury, NY 11590. Repairs will be made
and the instrument will be returned.
This warranty does not apply to defects resulting from unauthorized modification,
misuse, or use for any reason other than electrical power monitoring. The Nexus®
1262/1272 meter is not a user-serviceable product.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED
OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABIL-
ITY OR FITNESS FOR A PARTICULAR PURPOSE. ELECTRO INDUSTRIES/
GAUGETECH SHALL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL OR
CONSEQUENTIAL DAMAGES ARISING FROM ANY AUTHORIZED OR
UNAUTHORIZED USE OF ANY ELECTRO INDUSTRIES/GAUGETECH
PRODUCT. LIABILITY SHALL BE LIMITED TO THE ORIGINAL COST OF
THE PRODUCT SOLD.
Doc# E151701 iv
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Use of Product for Protection
Our products are not to be used for primary over-current protection. Any protection
feature in our products is to be used for alarm or secondary protection only.
Statement of Calibration
Our instruments are inspected and tested in accordance with specifications published
by Electro Industries/GaugeTech. The accuracy and a calibration of our instruments
are traceable to the National Institute of Standards and Technology through
equipment that is calibrated at planned intervals by comparison to certified stan-
dards.For optimal performance, EIG recommends that any meter, including those
manufactured by EIG, be verified for accuracy on a yearly interval using NIST trace-
able accuracy standards.
Disclaimer
The information presented in this publication has been carefully checked for
reliability; however, no responsibility is assumed for inaccuracies. The information
contained in this document is subject to change without notice.
Safety Symbols
In this manual, this symbol indicates that the operator must refer to
an important WARNING or CAUTION in the operating instructions.
Please see Chapter 11 for important safety information regarding
installation and hookup of the meter.
Dans ce manuel, ce symbole indique que l'opérateur doit se référer à un important
AVERTISSEMENT ou une MISE EN GARDE dans les instructions opérationnelles.
Veuillez consulter le chapitre 11 pour des informations importantes relatives à l'instal-
lation et branchement du compteur.
The following safety symbols may be used on the meter itself:
Les symboles de sécurité suivante peuvent être utilisés sur le compteur même:
This symbol alerts you to the presence of high voltage, which can
cause dangerous electrical shock.
Ce symbole vous indique la présence d’une haute tension qui peut
provoquer une décharge électrique dangereuse.
Doc# E151701 v
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
This symbol indicates the field wiring terminal that must be connected
to earth ground before operating the meter, which protects against
electrical shock in case of a fault condition.
Ce symbole indique que la borne de pose des canalisations in-situ qui doit être bran-
chée dans la mise à terre avant de faire fonctionner le compteur qui est protégé
contre une décharge électrique ou un état défectueux.
About Electro Industries/GaugeTech (EIG)
Founded in 1975 by engineer and inventor Dr. Samuel Kagan, Electro Industries/
GaugeTech changed the face of power monitoring forever with its first breakthrough
innovation: an affordable, easy-to-use AC power meter.
Forty years since its founding, Electro Industries/GaugeTech, the leader in power
monitoring and control, continues to revolutionize the industry with the highest qual-
ity, cutting edge power monitoring and control technology on the market today. An
ISO 9001:2000 certified company, EIG sets the industry standard for advanced power
quality and reporting, revenue metering and substation data acquisition and control.
EIG products can be found on site at mainly all of today's leading manufacturers,
industrial giants and utilities.
EIG products are primarily designed, manufactured, tested and calibrated at our facil-
ity in Westbury, New York.
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Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
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Electro Industries/GaugeTech
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Electro Industries/GaugeTech
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Table of Contents
1:Three-Phase Power Measurement 1-1
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8: Transformer Loss Compensation 8-1
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11: Electrical Installation 11-1
Considerations when Installing Meters 11-1
11.2: Blade Configuration for for Forms 9S, 36S, and 45S 11-5
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13: Meter Calculations 13-1
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