ROOTECH ACCURA 3500 User guide

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Notice

Symbols

Caution

Indicates the presence of dangerous voltage which can cause severe injury or death

if proper precautions are not followed.

Caution

Alerts users of the presence of hazards which can cause injury to persons, property

damage or damage to the device if proper precautions are not followed.

Note

Indicates major instructions for the installation, operation, and maintenance of the

product.

Indicates alternative voltage or current.

Indicates direct voltage or current.

Installation Considerations

The installation, operation, and maintenance of the product should be performed only by

qualified, competent personnel that have received appropriate training for high voltage and

current devices.

Caution

If hazardous voltages are mishandled while installing and operating the product in the field, it

can cause serious injury or death.

◼ During normal operation of the product, hazardous voltages are present on the

terminals that connect PTs/CTs, digital inputs, power, and external I/O circuits. The

PT/CT secondary can produce lethal voltage or current caused by the energy of the

primary.

◼ Standard safety precautions should be followed during the installation and maintenance

of the product, including removing PT fuses and shorting CT secondaries.

◼ Install the product in enclosures or a similar cabinet to prevent access to the terminal

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strips of the product after wiring.

Caution

Observe the following instructions, or it may cause permanent damage to the product.

◼ Do not apply voltages and currents that exceed the input ratings of the PT and CT to the

product.

◼ Using the device for other purposes not specified by the manufacturer can cause severe

damage to the product.

◼ Connect the chassis ground terminal of the product to the earth ground to protect the

device from noise and surge. Failure to properly connect the chassis ground will void

the warranty of the product.

About the Manual

Rootech, Inc. reserves the right to make changes in the product specifications shown in this User

Guide without prior notice. We recommend that customers should obtain the latest information on

product specifications and the manual before making orders.

In the absence of written agreements, Rootech, Inc. assumes no liability for applications assistance,

customer’s system design, or infringement of patents or copyrights induced by third parties arising

from the use of the products described herein.

We endeavor to provide accurate information in the document. However, we are not responsible

for any errors which may appear here and reserves the right to make changes without prior notice.

.

Limitation of Liability

Where applicable law allows and does not prohibit or restrict such limitation, Rootech, Inc’s

liability for this product shall be limited to the amount actually paid by customers for the product.

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Warranty

Rootech Inc. provides warrants for two years from the product receipt date only to the original

purchaser of the products and software that are sold or licensed by the company.

To obtain warranty service, the purchased products should be free from serious defects in material

and workmanship.

The software is provided in an up-to-date version, thus we do not offer any warranty for the

software product.

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

should immediately contact Rootech headquarters. Upon receiving claims, Rootech will check out

the product either at where the purchaser is or at the company after receiving the product from

the customer, who is responsible for the cost of shipping the product. After inspecting the product,

we will provide repair or replacement services for the product.

Rootech will decide at its discretion whether to repair or replace it or give a refund for the product

for when the warranty period for the product expired or issues related to the product are not

applicable for warranty terms and conditions.

Limitation of Warranty

The Warranty does not apply to uninterrupted or error-free operation of the product or cover

normal wear and tear of the product or costs caused by the removal, installation, or

troubleshooting of the customer's electrical systems.

Defects caused by any of the following factors are not covered under the warranty. Improper

use(alteration, accident, misuse, abuse) or failure to act in accordance with installation, operation

or maintenance instructions.

◼ Unauthorized modifications, changes or repair attempts

◼ Failure to comply with applicable safety standards & regulations

◼ Damages coming from when transporting or storing the product

◼ Damages caused by the force majeure event, including fire, flood, earthquakes, storm

damage, overvoltage & lightning

◼ If the original identification marks(trade-mark, serial number, etc.) have been defaced,

altered, or removed

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Rootech shall not be liable for any other claims except the claims made by customers, including

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

incurred related to the purchased product when the above warranty terms and conditions are not

fulfilled.

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

shall be deemed to be a suggestion. The original purchaser is responsible for determining the

feasibility of such suggestions and should conduct tests to prove their feasibility.

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

associated documentation. The original purchaser should acknowledge that 100% up time is not

realizable because of possible hardware or software defects. The original purchaser should

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

No agency, corporate entity, or employee of Rootech or other companies has authority to amend,

modify or extend the terms and conditions of this warranty in any way without express written

authorization from Rootech, Inc.

Standards Compliance

Process Control Equipment

E324900

KCC-REM-RTE-ACCURA3500

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Revision History

The following versions of the Accura 3500 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

Adding a menu item of extension module

configuration

1.22

Revision 1.2

2007. 07. 13

Mounting modified

Revision 1.4

2010. 11. 09

Adding A4P2, A2P4 modules

2.00

Revision 1.5

2012. 08. 06

Changing DI channel in ordering information

Revision 1.6

2013. 11. 25

Changing DI channel in ordering information

Revision 1.7

2015. 05. 12

Standard compliance updated

Revision 1.8

2016. 09. 05

Voltage wiring diagram updated

Revision 1.9

2017. 08. 07

IrDA deleted

Revision 1.10

2017. 09. 20

UL Certification code changed

Revision 1.11

2018. 01. 02

Notice, Warranty changed

Revision 1.20

2022. 04. 13

Setup item, wiring diagrams and screen

images changes

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Contents

Chapter 1 Introduction .................................................................................................................... 11

Overview ....................................................................................................................................... 11

Power Measurements, Digital/Analog Input and Output Integration .......................................... 11

Accuracy, Power Quality ............................................... 오류! 책갈피가 정의되어 있지 않습니다.

CE/UL Safety and Reliability .................................................................................................... 11

Easy Adding of Modules ......................................................................................................... 11

Features ........................................................................................................................................ 12

Measurement ......................................................................................................................... 12

Power Quality ......................................................................................................................... 12

Basic Module ......................................................................................................................... 12

Extension Module[only one module to be chosen as option] ..................................................... 12

Communication ..................................................................................................................... 13

Power Supply.......................................................................................................................... 13

Applications ................................................................................................................................... 14

True RMS Measurements robust to harmonics .......................................................................... 14

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

Module Structure to adapt to different requirements in the field................................................. 14

Compatibility with Analog Meters ............................................................................................ 14

High Reliability Energy Management ....................................................................................... 14

Parameters .................................................................................................................................... 15

Item ............................................................................................................................................... 15

Chapter 2 Mounting...................................................................................................................... 16

Environmental Conditions ....................................................................................................... 16

Enclosure Considerations ............................................. 오류! 책갈피가 정의되어 있지 않습니다.

Before You Begin ........................................................................................................................... 17

Meter Overview ...................................................................................................................... 17

Meter Dimensions .................................................................................................................. 18

Step 1: Mounting ......................................................................................................................... 19

Sequence ............................................................................................................................... 19

Step 2: Voltage and Current Inputs ............................................................................................... 20

Voltage Input .......................................................................................................................... 20

Current Input ......................................................................................................................... 21

Wiring Diagram Using External PTs ......................................................................................... 22

Direct Diagram Using No PTs .................................................................................................. 25

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Step 3: Wire the RS485 Communication ......................................................................................... 28

Step 4: Wire the Power Supply and Ground Terminal ....................................................................... 29

Power Supply.......................................................................................................................... 29

Ground Terminal .................................................................................................................... 29

Step 5: Add a Basic Module[DIO module] ....................................................................................... 30

Step 6: Wire a Basic Module ........................................................................................................... 31

DIO Module ........................................................................................................................... 31

Step 7: Wire the Power Supply and Ground Terminal of a Basic module ........................................... 34

Power Supply.......................................................................................................................... 34

Ground Terminal .................................................................................................................... 34

Step 8: Add a Extension Module ................................................................................................... 35

Step 9: Wire an Extension Module .................................................................................................. 36

DI Module .............................................................................................................................. 36

DO Module............................................................................................................................ 37

AI Module .............................................................................................................................. 39

AO Module ............................................................................................................................ 40

A4P2/A2P4 Module ................................................................................................................ 41

Step 10: Wire the Power Supply and Ground Terminal of a Expansion module ............................. 43

Power Supply.......................................................................................................................... 43

Ground Terminal .................................................................................................................... 44

Step 11: Power Up the Meter ........................................................................................................ 44

Chapter 3 Meter Operation/Setup .................................................................................................. 45

Display Mode ................................................................................................................................ 46

Setup Mode ................................................................................................................................... 49

Reset Mode .................................................................................................................................... 51

System Mode ................................................................................................................................. 52

Reactive Calculation Method ................................................................................................... 54

Module Mode ................................................................................................................................ 56

Module Display Menu ............................................................................................................. 56

Module Setup Menu ............................................................................................................... 59

APPENDIX A Standard Specification ................................................................................................ 71

APPENDIX B Standard Compliance ................................................................................................. 72

APPENDIX C Test Report ................................................................................................................ 73

Measuring Test ............................................................................................................................... 73

Reliability Test ................................................................................................................................ 74

APPENDIX D Order Information ..................................................................................................... 75

 
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Figures 
 
Fig 1.1 Front Side ................................................................................................................... 17 
Fig 1.2 Rear Side .................................................................................................................... 17 
Fig 1.3 Basic Module[DIO Module] Rear Side .......................................................................... 17 
Fig 1.4 Front View .................................................................................................................. 18 
Fig 1.5 Rear View ................................................................................................................... 18 
Fig 1.6 Side View ................................................................................................................... 18 
Fig 1.7 Side View[one extension module can be added as option when ordering] ...................... 18 
Fig 1.8 ANSI 4” ...................................................................................................................... 19 
Fig 1.9 DIN96 ........................................................................................................................ 19 
Fig 1.10 Voltage and Current Connector ................................................................................. 20 
Fig 1.11 Single Phase 2 Wires, Wiring Mode = 1P2U .............................................................. 22 
Fig 1.12 Three Phase 3 Wire Open Delta Using 2CTs, Wiring Mode = 3P3O ............................ 23 
Fig 1.13 Three Phase 3 Wire Open Delta Using 3CTs, Wiring Mode = 3P3O ............................ 23 
Fig 1.14 Three Phase 4 Wires Using 3 PTs and 3 CTs, Wiring Mode = 3P4U ............................. 24 
Fig 1.15 Single Phase 2 Wire Direct , Wiring Mode = 1P2U ..................................................... 25 
Fig 1.16 Single Phase 3 Wire Direct Using 2 CTs, Wiring Mode = 1P3U ................................... 26 
Fig 1.17 Three Phase 3 Wire Open Delta Direct, Wiring Mode = 3P3O .................................... 26 
Fig 1.18 Three Phase 3 Wire Open Delta Direct Using 3 CTs, Wiring Mode = 3P3O ................. 27 
Fig 1.19 Three Phase 4 Wire Direct Using 3 CTs, Wiring Mode = 3P4U .................................... 27 
Fig 1.20 Communication Wiring ............................................................................................. 28 
Fig 1.21 Wiring of Power Supply and Ground Terminal ............................................................ 29 
Fig 1.22 Adding of a Basic Module ......................................................................................... 30 
Fig 1.23 DIO Module ............................................................................................................. 31 
Fig 1.24 Digital Input ................................................. 오류!  책갈피가 정의되어 있지 않습니다. 
Fig 1.25 DC Relay application ................................................................................................ 33 
Fig 1.26 AC Relay application ................................................................................................. 33 
Fig 1.27 Wiring of Power Supply and Ground Terminal of a Basic module................................. 34 
Fig 1.28 adding of a extension module ................................................................................... 35 
Fig 1.29 DI Module ................................................................................................................ 36 
Fig 1.30 Digital Input ............................................................................................................. 37 
Fig 1.31 DO Module .............................................................................................................. 37 
Fig 1.32 DC Relay application ................................................................................................ 38 
Fig 1.33 AC Relay application ................................................................................................. 38 

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Fig 1.34 AI Module ................................................................................................................ 39 
Fig 1.35 Analog Input............................................................................................................. 39 
Fig 1.36 AO Module .............................................................................................................. 40 
Fig 1.37 Analog Output .......................................................................................................... 40 
Fig 1.38 A4P2 Module ............................................................................................................ 41 
Fig 1.39 A2P4 Module ............................................................................................................ 41 
Fig 1.40 A4P2/ A2P4 Module Analog Output .......................................................................... 41 
Fig 1.41 Pulse Output ............................................................................................................. 42 
Fig 1.42 Wiring of Power Supply and Ground Terminal of a Extension module .......................... 43 
Fig 2.1 Measurement Groups ................................................................................................. 46 
Fig 2.2 P, Q[according to general calculation] .......................................................................... 54 
Fig 2.3 DIO module channel information ................................................................................ 57 
Fig 2.4 DI module channel information ................................................................................... 57 
Fig 2.5 DO module channel information ................................................................................. 57 
Fig 2.6 AI module channel information 1 .................................................................................. 57 
Fig 2.7 AO module channel information 1 ............................................................................... 57 
Fig 2.8 A4P2 module channel information† ............................................................................. 58 
Fig 2.9 A2P4 module channel information† ............................................................................. 58 
Fig 2.10 DIO module digital output channel 1 setup ................................................................ 62 
Fig 2.11 DIO module digital output channel 2 setup ................................................................ 62 
Fig 2.12 DO module digital output channel 1 setup 1 ............................................................... 62 
Fig 2.13 DO module digital output channel 2 setup1 ................................................................ 62 
Fig 2.14 DO module digital output channel 3 setup1 ................................................................ 62 
Fig 2.15 DO module digital output channel 4 setup1 ................................................................ 62 
Fig 2.16 A4P2 module analog output channel 1 ...................................................................... 67 
Fig 2.17 A4P2 module pulse output channel 1 ......................................................................... 67 
Fig 2.18 A2P4 module analog output channel 1 ...................................................................... 70 
Fig 2.19 A2P4 module pulse output channel 1 ......................................................................... 70 
 

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Chapter 1 Introduction

Overview

Cost-effective Power Meter Providing Digital/Analog Inputs and Outputs

Accura 3500 is an integrated digital power meter that performs power measurements and also

provides digital/analog inputs and outputs. It is cost-effective in that it perfectly suits the needs of

managing various digital and analog inputs and outputs in the field. Thus, Accura 3500

eliminates the need to buy extra RTU products. It can be widely used in manufacturing plants, IBS,

semiconductor plants, etc, where power measurements and the management of inputs and

outputs are required.

Accurate Measurements/ Power Quality Data Available

Measurement accuracy is a key factor that determines the reliability of energy management

systems. Low measurement accuracy causes inconsistency between the energy of the incoming

feeder and the sum of energy measured on the load side. It makes it difficult to perform reliable

energy management. Accura 3500 provides highly accurate measurements of voltage and current

(±0.2% of reading) and meets IEC62053-22 class 0.5S for power and energy measurements. It

helps to address problems caused by measurement errors and allows for efficient energy

management. Accura 3500 provides power quality data such as voltage/current THD, harmonics,

and K-Factor.

Proven Safety and Reliability with CE/UL Certifications

The internal and external structures(the product and circuit design) of Accura 3500 meet safety

requirements for CE(IEC61010) and UL(UL61010-2, 2nd edition) standards. The busbar provided

with the product allows for easier wiring of CTs when installing the product. The busbar minimizes

fire hazards by ensuring safety under an overcurrent condition. And the optic interface between

the meter and connected modules removes risks of electrical hazards.

Easily Attachable I/O Modules

A variety of I/O expansion modules can be easily attached to the rear side of the Accura 3500

device. The I/O modules available include the digital input, digital output, analog input, and

analog output modules. Users can purchase the module they need when ordering the Accura

3500 device.

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Features

Measurement

◼ 64 samples/cycle True RMS

◼ IEC 62053-22 Class 0.5S

◼ 50, 60Hz

◼ 4 Quadrant Energy

- kWh/kVARh received1, kWh/kVARh delivered1

- kWh/kVARh net[kWh/kVARh received - kWh/kVARh delivered]

- kWh/kVARh total[kWh/kVARh received + kWh/kVARh delivered]

◼ Phase voltage, line to line voltage, current

◼ Power, energy, power factor, frequency

◼ Fundamental component, True RMS of current

◼ 4 Quadrant Power

◼ Demand, peak demand, Prediction demand

◼ Maximum, Minimum

1kWh/kVARh received is positive for “view as load”, kWh/kVARh delivered is positive for “view as

generator”.

Power Quality

◼ Voltage/current THD

◼ Harmonic Analysis 1

◼ K factor 1

1 It is available only on RS485 communication.

Basic Module

◼ DIO Module: Digital Input/output, 8/2 channels

Extension Module[only one module to be chosen as option]

◼ DI Module: Digital Input 12 channels

◼ DO Module: Digital Output 4 channels

◼ AI Module: Analog Input 6 channels

◼ AO Module: Analog Output 6 channels 1

◼ A4P2 Module: Analog Output 4 channels 2, Pulse Output 2 channels

◼ A2P4 Module: Analog Output 2 channels 2, Pulse Output 4 channels

1 Analog output controlled only by RS485 communication.

2 Analog output by measuring parameters configured inside meter.

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Communication

◼ RS485 Port[rear]

Modbus RTU Protocol

Baud rate: 1,200 ~ 57,600bps

Power Supply

◼ AC 85 ~ 265V, 50/60Hz

◼ DC 100 ~ 300V

◼ Burden: 10VA

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Applications

True RMS Measurements

Nonlinear loads mainly used in the field include rectifiers and electric furnaces and cause

harmonics that involve severe voltage and current waveform distortion. Accura 3500 performs

true RMS measurements for voltage and current waveforms distorted due to harmonics.

Power Quality Analysis

Accura 3500 provides data on voltage and current THD and K-Factor and allows for the analysis

of voltage and current harmonics up to the 31st order. It allows for effective analysis of power

quality by providing real time data on voltage and current waveforms.

Easily Expandable Module Structure to Suit Various Needs in the Field

I/O expansion modules can be easily added to the rear side of Accura 3500. Thus, its modular

structure helps to meet requirements for various applications in the field. In the existing

IBS(Intelligent Building System), all I/O modules should be connected to the DDC panel. It results

in increased costs and reduced system reliability. The DDC panel can be easily replaceable with

Accura 3500 since the device performs the function of the DDC panel. With reduced costs and

greater system reliability, Accura 3500 helps to establish optimized intelligent building systems.

Ideal for Replacing Analog Meters

Accura 3500 meets both NSI C39.1(4" Round) and DIN 96 standards for installation. It features

the installation dimensions same as those of analog meters. Thus, there is no need to create

cutouts on the panel when installing Accura 3500 in the existing switchgear panels. It makes it

easy to replace analog meters with digital meters.

Highly Reliable Energy Management

Energy management include monitoring energy consumption, managing energy costs and energy

demand, replacing energy facilities, and performing energy planning. In this regard,

measurement accuracy is a key factor that determines the reliability of energy management

systems. Accura 3500 provides highly accurate measurements of voltage and current (±0.2% of

reading) and meets IEC62053-22 class 0.5S for power and energy measurements. It allows for

efficient energy management through accurate measurements

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Parameters

Item

Realtime 1

Average 2

Total 3

Maximum 4

Minimum 5

Predicted 7

Phase voltage

■

Line to line voltage

■

Current

■

Power

Active

■

Reactive

■

Apparent

■

Energy 6

Active

■

Reactive

■

Apparent

■

Frequency

■

Power factor

■

THD

Voltage

■

Current

■

Demand

Power

■

Current

■

1 Instantaneous value of each parameter 2 Average value of three phase parameters. 3 Total value of three

phase parameters.

4 If a real-time value is greater than the maximum value, the maximum value is updated.(The value

measured within 10 msecs after power up is ignored.)

5 If a real-time value is smaller than the minimum value, the minimum value is updated. (The value

measured within 10 msecs after power up is ignored.)

6 Energy values are periodically stored to non-volatile memory.

7 Predicted demand is calculated based on the accumulated real-time value.

Note

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

displayed 5 seconds after power-up.

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Chapter 2 Mounting

Environmental Conditions

The Accura 3500 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

Environmental Conditions

Installation location

Indoors

Operating Temp

-20 to 70C[-4 to 158℉]

Storage Temp

-40 to 85C[-40 to 185℉]

Operating Humidity

5 ~ 95%(non-condensing)

Caution

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.

Caution

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[DIO Module] Rear Side

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Meter Dimensions

Fig 1.4 Front View

Fig 1.5 Rear View

Fig 1.6 Side View

Fig 1.7 Side View[one extension module can be added as

option when ordering]

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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].

3. Fix the meter onto the panel by turning the mounting nut. When conforming to the

DIN96 standard, there is no need to drill holes on the panel.

Fig 1.8 ANSI 4”

Fig 1.9 DIN96

Note

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

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Step 2: Voltage and Current Inputs

Fig 1.10 Voltage and Current Connector

Voltage Input

Item

Description

Pin name

V1, V2, V3, Vn

Connector

Terminal block

Wire spec

2.1 to 3.5 mm2[ 14 to 12 AWG]

Rating1

0 ~ 600V 3 ~ L-L[Line to line], 0 ~ 457V 3 ~ L-N[Line to neutral]

Burden

0.02VA/phase @220V

Impedance

3MΩ/phase

Compliance

Pollution degree 2, Installation Category Ⅲ

Caution

In three phase 3 wire open delta direct connection mode, line to line voltage should not exceed

457V.

PT[Potential Transformer]

PTs are required for all systems with voltage levels greater than these above. The meter inputs can

be used with PTs that have secondaries rated between AC 0V and 457V. PTs should comply with

IEC61010-1 2nd Edition, Pollution Degree 2, Overvoltage Category Ⅲ.

Caution

In case where PTs are required, fuses should be installed on the secondary of the PTs.

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ROOTECH ACCURA 3500 User guide

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