EI Nexus 1250 User manual

Nexus

1250/1252

Advanced performance power meter

and power quality recorder

Electro Industries/GaugeTech

1800 Shames Drive

Westbury, New York 11590

Tel: 516-334-0870 Fax: 516-338-4741

[email protected] www.electroind.com

“The Leader in Power Monitoring and Control”

Installation & Operation Manual

Version 1.29

August 7, 2008

Doc # E107706 V.1.29

Electro Industries/GaugeTech

Doc #E107706

Electro Industries/GaugeTech

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exus® 1250/1252 Meter

Installation and Operation Manual

Revision 1.29

Published by:

Electro Industries/GaugeTech

1800 Shames Drive

Westbury, NY 11590

ublication may be reproduced or

transmitted in any form or by any

means, electronic or mechanical,

including photocopying, recording, 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.

Electro Industries/GaugeTech

Printed in the United States of

America.

exus® is a registered trademark of

Electro Industries/GaugeTech.

Electro Industries/GaugeTech

Doc # E107706 ii

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 description 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, transportation prepaid, to EIG at 1800

Shames Drive, Westbury, NY 11590. Repairs will be made and the instrument will be returned.

Limitation of Warranty

This warranty does not apply to defects resulting from unauthorized modification, misuse, or use

for any reason other than electrical power monitoring. The Nexus® 1250/1252 meter is not a

user-serviceable product.

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.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR

IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY 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.

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 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.

This symbol indicates that the operator must refer to an explanation in the

operating instructions. Please see Chapter 3, Hardware Installation, for

important safety information regarding installation and hookup of the

Nexus® 1250/1252 Meter.

Electro Industries/GaugeTech

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About Electro Industries/GaugeTech

Electro Industries/GaugeTech was founded in 1973 by Dr. Samuel Kagan. Dr. Kagan’s first

innovation, an affordable, easy-to-use AC power meter, revolutionized the power-monitoring

field. In the 1980s Dr. Kagan and his team at EIG developed a digital multifunction monitor

capable of measuring every aspect of power.

EIG further transformed AC power metering and power distribution with the Futura+ device,

which supplies all the functionality of a fault recorder, an event recorder and a data logger in a

single meter. Today, with the Nexus® 1250/1252 meter, the Nexus® 1262/1272 meters and the

Shark® Series meters, EIG is a leader in the development and production of power monitoring

products. All EIG products are designed, manufactured, tested and calibrated at our facility in

Westbury, New York.

Today, EIG continues to maintain its standing as the world leader in power monitoring and power

quality technology. Our meters are used world wide by the largest investor-owned electric power

utilities, municipal governments, the Military, and industry. With over thirty years of experience,

EIG prides itself on being an integral component to the goal of making electrical power

distribution reliable and affordable.

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Electro Industries/GaugeTech

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Table of Contents

Chapter 1: Three-Phase Power Measurement

1.1: Three-Phase System Configurations 1-1

1.1.1: Wye Connnection 1-1

1.1.2: Delta Connection 1-3

1.1.3: Blondell’s Theorem and Three Phase Measurement 1-4

1.2: Power, Energy and Demand 1-6

1.3: Reactive Energy and Power Factor 1-8

1.4: Harmonic Distortion 1-10

1.5: Power Quality 1-13

Chapter 2: Nexus® 1250/1252 Meter Overview

2.1: Meter Features 2-1

2.2: Upgrading the Meter’s V-Switch™Key 2-3

2.3: DNP V3.00 Level 2 2-4

2.4: Flicker and EN50160 Analysis 2-4

2.5: Communications Options 2-4

2.6: Measurements and Calculations 2-5

2.7: Demand Integrators 2-9

2.8: Nexus® External Output Modules 2-11

2.9: Meter Specifications 2-12

2.10: Nexus® P40N, P41N, P43N LED External Display Specifications 2-13

2.11: Nexus® P60N Touch Screen Display Specifications 2-13

Chapter 3: Hardware Installation

3.1: Mounting the Meter 3-1

3.2: Mounting the Nexus® External LED Displays 3-3

3.3: Mounting the Nexus® P60N Touch Screen External Display 3-4

3.4: Mounting the Nexus® External Output Modules 3-6

Chapter 4: Electrical Installation

4.1: Wiring the Monitored Inputs and Voltages 4-1

4.2: Fusing the Voltage Connections 4-1

4.3: Wiring the Monitored Inputs - Vref 4-1

4.4: Wiring the Monitored Inputs - Vaux 4-1

4.5: Wiring the Monitored Inputs - Currents 4-1

4.6: Isolating a CT Connection Reversal 4-2

4.7: Instrument Power Connections 4-2

4.8: Wiring Diagrams 4-3

Chapter 5: Communication Wiring

5.1: Communication Overview 5-1

5.2: RS232 Connection - Nexus® Meter to a Computer 5-5

5.3: Nexus® Meter RS485 Wiring Fundamentals 5-5

5.4: RS485 Connection - Nexus® Meter to a Computer or PLC 5-8

5.5: RJ-11 Connection - Nexus® Meter with INP2 to a PC 5-8

5.6: RJ-45 Connection - Nexus® Meter with INP200 to multiple PCs 5-8

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5.7: RS485 Connection - Nexus® Meter to an RS485 Master 5-9

5.7.1: Using the Unicom 2500 5-9

5.8: RS485 Connection - Nexus® Meter to P40N External Display 5-11

5.9: RS485 Connection - Nexus® Meter to P60N External Display 5-12

5.10: Communication Ports on the Nexus® Output Modules 5-13

5.11: RS485 Connection - Nexus® Meter to Nexus® Output Modules 5-14

5.12: Steps to Determine Power Needed 5-15

5.13: Output Modules’ Factory Settings and VA Ratings 5-15

5.14: Linking Multiple Nexus® Meters in a Series 5-16

5.15: Remote Communication Overview 5-18

5.16: Remote Communication - RS232 5-19

5.17: Remote Communication - RS485 5-19

5.18: Programming Modems for Remote Communication 5-20

5.19: Selected Modem Strings 5-21

5.20: High Speed Inputs Connection 5-21

5.21: IRIG-B Connections 5-22

Chapter 6: Using the Nexus® Meter’s External Displays

6.1: Overview 6-1

6.2: Nexus® P40N, P41N, and P43N LED External Displays 6-1

6.2.1: Connect Multiple Displays 6-2

6.2.2: Nexus® P40N Modes 6-2

6.3: Dynamic Readings Mode 6-3

6.4: Navigation Map of Dynamic Readings Mode 6-5

6.5: Nexus® Meter’s Information Mode 6-6

6.6: Navigation Map of Nexus® Meter’s Information Mode 6-7

6.7: Display Features Mode 6-8

6.8: Navigation Map of Display Features Mode 6-9

6.9: Nexus® P60N Touch Screen External Display 6-10

Chapter 7: Transformer Loss Compensation

7.1: Introduction 7-1

7.2: Nexus® Meter’s Transformer Loss Compensation 7-3

7.2.1: Loss Compensation in Three Element Installations 7-4

7.2.1.1: Three Element Loss Compensation Worksheet 7-5

Chapter 8: Time-of-Use Function

8.1: Introduction 8-1

8.2: The Nexus® Meter’s TOU Calendar 8-1

8.3: TOU Prior Season and Month 8-2

8.4: Updating, Retrieving, and Replacing TOU Calendars 8-2

8.5: Daylight Savings and Demand 8-2

Chapter 9: Nexus® External Output Modules

9.1: Hardware Overview 9-1

9.1.1: Port Overview 9-2

9.2: Installing Nexus® External Output Modules 9-3

9.2.1: Power Source for Output Modules 9-4

9.3: Using PSIO with Multiple Output Modules 9-5

9.3.1: Steps for Attaching Multiple Output Modules 9-5

9.4: Factory Settings and Reset Button 9-6

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9.5: Analog Transducer Signal Output Modules 9-7

9.5.1: Overview 9-7

9.5.2: Normal Mode 9-8

9.6: Digital Dry Contact Relay Output Module (Form C) 9-9

9.6.1: Overview 9-9

9.6.2: Communication 9-10

9.6.3: Normal Mode 9-10

9.7: Digital Solid State Pulse Output (KYZ) Module 9-11

9.7.1: Overview 9-11

9.7.2: Communication 9-12

9.7.3: Normal Mode 9-12

9.8: Specifications 9-13

Chapter 10: Nexus® Meter with Internal Modem Option (INP2)

10.1: Hardware Overview 10-1

10.2: Hardware Connection 10-2

10.3: Dial-In Function 10-2

10.4: Dial-Out Function 10-2

Chapter 11: Nexus® Meter with Internal Network Option (INP200)

11.1: Hardware Overview 11-1

11.2: Network Connection 11-2

Chapter 12: Flicker and EN50160 Analysis

12.1: Overview 12-1

12.2: Theory of Operation 12-1

12.3: Flicker Setting (1250 and 1252 V-1) 12-3

12.4: EN50160 Flicker Polling Screen 12-4

12.5: Logging 12-6

12.6: Polling through a Communication Port 12-6

12.7: Log Viewer 12-6

12.8: Performance Notes 12-7

12.9: EN50160 Power Quality Compliance Analysis (1252 V-2) 12-8

12.9.1: EN50160 Configuration 12-8

12.9.2: EN50160 Analysis 12-9

Glossary GL-1

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