ROOTECH ACCURA 3550 User guide

ACCURA 3550

Digital Power Meter for Rectifier Panel

Replaces TD and RTU

User Guide[English]

Rev 1.7 2017/09/20

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Notice

Danger

Indicates the presence of

dangerous voltage which can cause severe injury or death

to persons if proper precautions are not followed.

Warning

Alerts

the user to the presence of hazards which can cause somewhat injury to

p

ersons, damage to property or damage to the device itself, if proper precautions

are not followed.

Note

Indicates the user’s attention to installation, operating and maintenance instructions.

Electrical Symbols

Indicates alternative voltage or current.

Indicates direct voltage or current.

Installation Considerations

Installation and operation of Accura 3550 meter should be performed only by qualified,

competent personnel that have appropriate training and experience with high voltage and current

devices.

Danger

Failure to observe the following instructions may result in severe injury or death.

 During normal operation of the Accura 3550 meter, hazardous voltages are present on

its terminal strips.

 Standard safety precautions are followed while performing any installation or service

work[removing PT fuses, shorting CT secondaries, etc].

 Do not access to terminal strips of the Accura 3550 meter after installation.

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Warning

Observe the following instructions, or permanent damage to the meter may occur.

 Do not apply Accura 3550 to voltages and currents that exceed Input ratings of PT and

CT.

Limitation of Liability

Rootech Inc. reserves the right to make changes in the device specifications shown in this User’s

Guide without notice. Rootech Inc. advises customers to obtain the latest specifications of device

before giving orders to confirm that the information being relied on by the customer is up to date.

In the absence of written agreement to the contrary, Rootech Inc. assumes no liability for Rootech

Inc. applications assistance, customer’s system design, or infringement of patents or copyrights of

third parties by or arsing from the use of devices described herein.

Except to the extent prohibited by applicable law, under no circumstances shall Rootech Inc. be

liable for consequential damages sustained in connection with said product and Rootech Inc.

neither assumes nor authorizes any representative or other person any obligation or liability other

than such as is expressly set forth herein.

The information contained in this document is believed to be accurate at the time of publication,

however, Rootech Inc. assumes no responsibility for any errors which may appear here and

reserves the right to make changes without notice.

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Standard Compliance

CE Approved

EN61326 and IEC61010

Process Control Equipment

E324900

QMS-1347 KAB-QC-09

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Warranty Information

For products and software that are sold or licensed by Rootech Inc. during the period from the

date of receipt by you until the present, Rootech warrants only to the original purchaser

The purchased products other than software shall be substantially free from material defects in

material and workmanship by Rootech for two years from the date receipt by you.

The software itself is provided “as is” without any warranty of any kind.

Limitation of Warranty

These limited Warranties shall not apply to any product that has been subject to alteration,

accident, misuse, abuse, neglect or failure to exactly follow Power Measurement's instructions for

operation and maintenance.

In order for the original purchaser to make a claim under the warranties described above, the

original purchaser must promptly contact Rootech headquarter. After receiving such notice,

Rootech may either in Rootech’s sole discretion, examine the product at the original purchaser’s

site or issue shipping instructions to the original purchaser to return the relevant product to

Rootech for examination at the original purchaser’s expense, transportation charges prepaid.

If after examining the product Rootech reasonably confirms that such examined product does not

meet the warranties, then the original purchaser’s sole remedy and Rootech’s sole obligation or

liability shall be, at Rootech’s option, to repair, replace or refund the price paid for that product.

Regardless of whether any remedy set forth herein fails of its essential purpose, except to the

extent the following limitation is prohibited by applicable law, Rootech shall not, in any event or

under any legal claim or theory, be liable to the original purchaser or any other person or entity

for special, indirect, incidental, punitive, liquidated, special or consequential damages whatsoever

with respect to any purchased product, including, without limitation, business interruption, loss of

use, profit or revenue, even if Rootech has been advised of the possibility of such damages. To the

extent that a limitation or exclusion of consequential damages are prohibited by applicable law,

then Rootech’s liability shall be limited to twice the amount of the relevant purchased product.

Rootech shall not be liable for any claim- other than a claim solely for the breach of one of the

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above warranties that is made in accordance with the above described procedures- made by the

original purchaser, its employees, agents, or contractors for any loss, damage, or expense

incurred due to, caused by, or related to any purchased product

Any technical assistance provided by Rootech's personnel or representatives in system design shall

be deemed to be a proposal and not a recommendation. The responsibility for determining the

feasibility of such proposals rests with the original purchaser and should be tested by the original

purchaser.

It is the original purchaser’s responsibility to determine the suitability of any product and

associated documentation for its purposes. The original purchaser acknowledges that 100% "up"

time is not realizable because of possible hardware or software defects. The original purchaser

recognizes that such defects and failures may cause inaccuracies or malfunctions.

Only the terms expressed in these limited Warranties shall apply and no distributor, corporation or

other entity, individual or employee of Rootech or any other entity is authorized to amend, modify

or extend the Warranties in any way.

Headquarter

102-611, Digital Empire2, Sinwonro-88,

Suwon, Korea

Tel : +82-31-695-7350 Fax : +82-31-695-7399

Homepage

www.rootech.com

E-mail

[email protected]

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Revision History

The following versions of the Accura 3550 User’s Guide have been released.

Revision #

Revision date

Description

Firmware version

Revision 1.0 2006. 06. 30 Initial draft

Revision 1.1 2007. 04. 24 Modifying basic module recognition 1.17

Revision 1.2 2007. 07. 13 Mounting modified

Revision 1.3 2009. 11. 28 Voltage input range modified

Revision 1.4 2015. 05. 12 Standard compliance updated

Revision 1.5 2016. 09. 05 Voltage wiring diagram updated

Revision 1.6 2017. 08. 07 IrDA deleted

Revision 1.7 2017. 09. 20 UL Certification code changed

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Contents

Chapter 1 Introduction ................................................................................................................................... 13

Overview ......................................................................................................................................................................................... 13

AC/DC Measurements dedicated to Rectifier .................................................................................................... 13

Accuracy, Power Quality ................................................................................................................................................ 13

CE/UL Safety and Reliability ........................................................................................................................................ 13

Features ........................................................................................................................................................................................... 14

Measurement ..................................................................................................................................................................... 14

Power Quality ..................................................................................................................................................................... 14

Basic Module ...................................................................................................................................................................... 14

Communication ................................................................................................................................................................. 14

Power Supply...................................................................................................................................................................... 14

Applications ................................................................................................................................................................................... 15

Measurements dedicated to Rectifier .................................................................................................................... 15

True RMS Measurements robust to harmonics ................................................................................................. 15

Power Quality Analysis .................................................................................................................................................. 15

Compatibility with Analog Meters ........................................................................................................................... 15

High Reliability Energy Management ..................................................................................................................... 15

Parameters ..................................................................................................................................................................................... 16

Chapter 2 Mounting ........................................................................................................................................ 17

Environmental Conditions ............................................................................................................................................ 17

Enclosure Considerations ............................................................................................................................................. 17

Before You Begin ........................................................................................................................................................................ 18

Meter Overview................................................................................................................................................................. 18

Meter Dimensions ............................................................................................................................................................ 19

Step 1: Mounting ........................................................................................................................................................................ 20

Sequence .............................................................................................................................................................................. 20

Step 2: Voltage and Current Inputs ................................................................................................................................... 21

Voltage Input ...................................................................................................................................................................... 21

Current Input ...................................................................................................................................................................... 22

Wiring Diagram Using External PTs ........................................................................................................................ 23

Direct Diagram Using No PTs .................................................................................................................................... 26

Step 3: Wire the RS485 Communication ........................................................................................................................ 29

Step 4: Wire the Power Supply and Ground Terminal ............................................................................................. 30

Power Supply...................................................................................................................................................................... 30

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Ground Terminal ............................................................................................................................................................... 30

Step 5: Add a Basic Module[DC module] ....................................................................................................................... 31

Step 6: Wire a Basic Module ................................................................................................................................................. 32

DC Module .......................................................................................................................................................................... 32

Step 7: Wire the Power Supply and Ground Terminal of a Basic module ..................................................... 35

Power Supply...................................................................................................................................................................... 35

Ground Terminal ............................................................................................................................................................... 35

Step 8: Power Up the Meter .............................................................................................................................................. 36

Chapter 3 Meter Operation/Setup ............................................................................................................. 37

Display Mode ............................................................................................................................................................................... 37

Setup Mode .................................................................................................................................................................................. 40

Reset Mode ................................................................................................................................................................................... 42

System Mode ................................................................................................................................................................................ 43

Reactive Calculation Method...................................................................................................................................... 45

Module Mode .............................................................................................................................................................................. 47

Module Display Menu ................................................................................................................................................... 47

Module Setup Menu ...................................................................................................................................................... 48

APPENDIX A Standard Specification.......................................................................................................... 52

APPENDIX B Standard Compliance ............................................................................................................ 54

APPENDIX C Test Report ............................................................................................................................. 55

Measuring Test ............................................................................................................................................................................. 55

Reliability Test ............................................................................................................................................................................... 56

INDEX ................................................................................................................................................................. 57

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Figures

Fig 1.1 Front Side ............................................................................................................................................................. 18

Fig 1.2 Rear Side ............................................................................................................................................................... 18

Fig 1.3 Basic Module[DC Module] Rear Side ..................................................................................................... 18

Fig 1.4 Front View ............................................................................................................................................................ 19

Fig 1.5 Rear View.............................................................................................................................................................. 19

Fig 1.6 Side View .............................................................................................................................................................. 19

Fig 1.7 ANSI 4” .................................................................................................................................................................. 20

Fig 1.8 DIN96 ..................................................................................................................................................................... 20

Fig 1.9 Voltage and Current Connector ................................................................................................................ 21

Fig 1.10 Single Phase 2 Wires, Wiring Mode = 1P2U ................................................................................... 23

Fig 1.11 Three Phase 3 Wire Open Delta Using 2CTs, Wiring Mode = 3P3O ................................... 24

Fig 1.12 Three Phase 3 Wire Open Delta Using 3CTs, Wiring Mode = 3P3O ................................... 24

Fig 1.13 Three Phase 4 Wires Using 3 PTs and 3 CTs, Wiring Mode = 3P4U ................................... 25

Fig 1.14 Single Phase 2 Wire Direct , Wiring Mode = 1P2U ..................................................................... 26

Fig 1.15 Single Phase 3 Wire Direct Using 2 CTs, Wiring Mode = 1P3U ............................................ 27

Fig 1.16 Three Phase 3 Wire Open Delta Direct, Wiring Mode = 3P3O .............................................. 27

Fig 1.17 Three Phase 3 Wire Open Delta Direct Using 3 CTs, Wiring Mode = 3P3O ................... 28

Fig 1.18 Three Phase 4 Wire Direct Using 3 CTs, Wiring Mode = 3P4U ............................................. 28

Fig 1.19 Communication Wiring ............................................................................................................................... 29

Fig 1.20 Wiring of Power Supply and Ground Terminal ............................................................................... 30

Fig 1.21 Adding of a Basic Module......................................................................................................................... 31

Fig 1.22 DC Module ........................................................................................................................................................ 32

Fig 1.23 DC Voltage/Current ...................................................................................................................................... 32

Fig 1.24 Digital Input...................................................................................................................................................... 33

Fig 1.25 DC Relay application .................................................................................................................................... 34

Fig 1.26 AC Relay application .................................................................................................................................... 34

Fig 1.27 Wiring of Power Supply and Ground Terminal of a Basic module ....................................... 35

Fig 2.1 Measurement Groups ..................................................................................................................................... 37

Fig 2.2 P, Q[according to general calculation] ................................................................................................... 45

Fig 2.3 DC module channel information .............................................................................................................. 47

Fig 2.4 DC module rectifier current shunt ........................................................................................................... 50

Fig 2.5 DC module battery current shunt ............................................................................................................ 50

Fig 2.6 DC module digital input channel 1 of rectifier fault ...................................................................... 50

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Fig 2.7 DC module digital input channel 2 of rectifier fault ...................................................................... 50

Fig 2.8 DC module digital input channel 3 of rectifier fault ...................................................................... 51

Fig 2.9 DC module digital input channel 4 of rectifier fault ...................................................................... 51

Fig 2.10 DC module digital output channel 1 setup...................................................................................... 51

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Chapter 1 Introduction

Overview

AC/DC Measurements dedicated to Rectifier

Accura 3550 is a high accuracy digital power meter dedicated to rectifier, suited to power

measurements and DC measurements. In rectifier, the existing customers obtain dc voltage and

current from analog inputs of RTU after converting signals using separate tranducer. The signal

conversion several times deteriorates the overall data reliability, and causes the rising of costs. The

device simply replaces the existing RTU using Tranducer, solving the above two problems.

Accuracy, Power Quality

The measuring accuracy is the most important criterion to evaluate the reliability of energy

management system. Actually low accuracy makes it hard for customers to precisely manage

energy, causing inequality of energy between incoming feeder and sum of load sides. Accura

3550 makes ±0.2% high accuracy measurements for voltage and current, and conforms to

IEC62053-22 class 0.5S for power and energy. This makes it possible to solve the problem with

energy inequality. Furthermore the device provides the information of power qualities, such as

voltage/current THD, harmonic analysis, and k factor.

CE/UL Safety and Reliability

The structure- framework, circuit, fire - of Accura 3550 conforms to safety standard,

CE[IEC61010], UL[UL61010-2, 2nd edition]. Particularly the device provides pass-through busbar,

allowing CT leads to be terminated on the device. This eliminates any possible point of failure at

the device. And optic interface between meter and module essentially disturbs danger of the

existing electrical contacts.

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Features

Measurement

 64 Sampling/Cycle True RMS

 IEC 62053-22 Class 0.5S

 50, 60Hz

 Phase voltage, line to line voltage, current

 Power, energy, power factor, frequency

 Fundamental component, True RMS of current

 4 Quadrant Power

 Demand, peak demand†

 Maximum, Minimum†

Power Quality

 Voltage/current THD

 Harmonic Analysis†

 K factor†

†It is available only on RS485 communication.

Basic Module

 DC Module:

DC Voltage Input 1 channel

DC Current Input 2 channels

Digital Input 4 channels

Digital Output 1 channel

Communication

 RS485 Port[rear]

Modbus RTU Protocol

Baudrate: 1,200 ~ 57,600bps

Power Supply

 AC 85 ~ 265V, 50/60Hz

 DC 100 ~ 300V

 Burden: 10VA

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Applications

Measurements dedicated to Rectifier

Rectifier panel guarantees reliability of control power in energy system during the interruption of

power. Accura 3550 is a high accuracy digital power meter dedicated to rectifier, suited to power

measurements, DC measurements, and rectifier status.

True RMS Measurements robust to harmonics

Most of energy environments consist of nonlinear loads, such as industrial load, rectifier, power

electronic device, electric furnace and etc. this causes fatal distortion of voltage and current

waveforms. Accura 3550 makes high accuracy True RMS measurements for voltage and current

distorted with harmonics.

Power Quality Analysis

Accura 3550 provides k factor, analysis of voltage and current up to 31st harmonic, and realtime

waveform of voltage and current.

Compatibility with Analog Meters

Accura 3550 mounts directly in ANSI C39.1[4” Round] or DIN 96. this is perfect for new

installations and for existing panels. In new installations, simply use existing DIN or ANSI punches.

For existing panels, pull out old analog meters and fit the device in its cutout.

High Reliability Energy Management

The most important point to evaluate the overall data reliability of energy management is the

accuracy of meters. Accura 3550 makes ±0.2% high accuracy measurements for voltage and

current, and conforms to IEC62053-22 class 0.5S for power and energy. Energy management

gives customers various services, monitoring, cost curtailment, demand, energy planning, rectifier

management and etc.

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Parameters

Realtime

1

Average

2

Total

3

Maximum

4

Minimum

5

Phase voltage ■ ■ ■

* ■

*

Line to line voltage ■ ■ ■

* ■

*

Current ■ ■ ■

*

Power Active ■ ■ ■

*

Reactive ■ ■ ■

*

Apparent ■ ■ ■

*

Energy Active ■

Reactive ■

Apparent ■

Frequency ■

Power factor ■ ■

THD Voltage ■

Current ■

Demand Voltage ■

* ■

*

Current ■

* ■

*

DC Voltage ■

Current ■

1Instaneous measuring. 2Average of three phase parameters. 3Total sum of three phase parameters.

4If realtime measurements exceed maximums, the maximums will be updated, the measurements being

ignored within 10msecs after power up.

5If realtime measurements is less than minimums, the minimums will be updated, the measurements being

ignored within 10msecs after power up.

*It is available only on RS485 communication

Note

The Maximums and minimums will not be updated with no power-up.

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Chapter 2 Mounting

Environmental Conditions

The Accura 3550 should be mounted in a dry, dirt free location away from heat sources and very

high electric fields. To operate properly and effectively, environmental conditions should range

within the following guidelines

Items Acceptable Range

Position Indoor use

Operating Temp -20 ~ 70°C[-4℉ ~ 158℉]

Storage Temp -40 ~ 85°C[-40℉ ~ 185℉]

Operating Humidity 5 ~ 95% Non condensing

Enclosure Considerations

The enclosure the Accura 3550 is mounted in (typically a switchgear cabinet) should protect the

device from atmospheric contaminants such as oil, moisture, dust, and corrosive vapors, or other

harmful airborne substances. The mounting enclosure should be positioned such that the doors

may be opened fully for easy access to the Accura 3550 wiring and related components to allow

for convenient troubleshooting.

Warning

The meter should be

installed in a switchgear cabinet or similar enclosure to ensure the terminal

strips on the meter base are not user accessible after installation.

Mount the meter in a dry location free from dirt and corrosive vapors. Once installed, no cleaning

of the device is necessary.

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Before You Begin

Before installing the meter, observe the instructions in this guide and read the safety precautions

presented on the “Installation Considerations” page.

Danger

Power up after the voltage and current wiring is completed.

Meter Overview

Fig 1.1 Front Side Fig 1.2 Rear Side

Fig 1.3 Basic Module[DC Module] Rear Side

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Meter Dimensions

Fig 1.4 Front View Fig 1.5 Rear View

Fig 1.6 Side View

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Step 1: Mounting

Sequence

1. Remove connector on the bottom of the meter.

2. fit the meter into cutout[ANSI 4” or DIN96]

Fig 1.7 ANSI 4” Fig 1.8 DIN96

Note

The meter is mounted on switchgear boards (metal cabinet) in electrical facilities.

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