ROOTECH Accura 2300/2350 User guide

Distribution Panel Digital Power Meter

Accura 2300 front

Accura 2300 rear

Accura 2300-RS485 rear

Three-phase Power Measuring Module/ Terminal Block

Single-phase Power Measuring Module/ Terminal Block

Accura 2350-3P-250A-105

TM-3P-105

Accura 2350-1P-250A-105

TM-1P-105

Accura 2350-3P-125A-90

TM-3P-90

Accura 2350-1P-125A-60

TM-1P-60

Accura 2350-3P-100A-75

TM-3P-75L

Accura 2350-1P-100A-50

TM-1P-50L

Accura 2350-3P-60A-75

TM-3P-75

Accura 2350-1P-60A-50

TM-1P-50

Accura 2350-3P-CT5A-75

Accura 2350-1P-50A-35

Accura 2350-1P-30A-35

Accura 2350-1PSH-50A-35

Accura 2350-1PSH-30A-35

Split-core Three-phase

Power Measuring Module

Split-core Single-phase

Power Measuring Module

Split-core Single-phase Single-hole

Power Measuring Module

Accura 2350-3PSC-250A-105

Accura 2350-1PSC-250A-105

Accura 2350-1PSCSH-800A

Accura 2350-3PSC-125A-90

Accura 2350-1PSC-125A-60

Accura 2350-1PSCSH-630A

Accura 2350-3PSC-60A-75

Accura 2350-1PSC-60A-50

Accura 2350-1PSCSH-400A

Accura 2350-3PSC-CT5A-90

Special-purpose Modules

Accura 2350-GAS

Accura 2350-GW

Accura 2350-TEMP

Accura TSEN

Accura 2350-TEMPS

Accura 2350-DO

Accura 2350-IDC

Accura 2350-VDC

Accura 2350-DCM-50V-80A

Accura 2350-DCM-500V-80A

Accura 2300/2350 User Guide

Notice

Page 5

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.

◼ This device must be installed and serviced only by qualified personnel who have in-depth knowledge

of installing, commissioning and operating the device and have had appropriate training. He or she

should have read and understood the various safety measures and warnings stated in the instructions.

◼ Before carrying out any work on the device, switch off the power supply to the device.

◼ Always use an appropriate voltage detection device to confirm the absence of voltage.

◼ Always power the device with the correct rated voltage.

◼ Install the device in a suitable electrical cabinet by following recommended installation instructions.

Failure to take these precautions could cause serious injuries or death.

Notice

Accura 2300/2350 User Guide

Page 6

Caution

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

To ensure that the device operates correctly, make sure that:

◼ The device is correctly installed.

◼ The power supply voltage indicated on the product is observed: AC 100 – 240 V, DC 100 – 300 V.

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.

Accura 2300/2350 User Guide

Warranty

Page 7

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.

Warranty

Accura 2300/2350 User Guide

Page 8

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

R-R-RTE-ACCURA2300

Accura 2300/2350 User Guide

Revision History

Page 9

Revision History

The following versions of Accura 2300/2350 User Guide have been released.

Revision

Date

Description

Revision 2.00

February 14, 2022

Release of the User Guide for the device with the HW revision number

higher than 100.00

Changed voltage sampling information to 512 samples/cycle

Added contents on the 1P2F measurement of the 3P power measuring

module

Added contents on the demand sync mode

Added contents on connection between external ZCTs and Accura 2350

modules

Added contents on the power event log

Revision 2.01

September 27, 2022

Changed some of the terms used in the document to achieve

consistency

Revision 2.10

July 7, 2023

Changed the harmonic order range needed to calculate voltage THD up

to the 50th order

Added the descriptions of data aggregation

Changed specifications for power supply and voltage measurements

Contents 
 
Accura 2300/2350 User Guide 
 
Page 10 
ⓒ 2011 Rootech Inc. All Rights Reserved 
 
Contents 
Chapter 1
 
Introduction ..................................................................................................................................................... 18 
Overview .................................................................................................................................................................................................................. 18 
Applications ........................................................................................................................................................................................................... 21 
Product Information .......................................................................................................................................................................................... 22 
Distribution Panel Digital Meter/Power Measuring Module .............................................................................................. 22 
Special-purpose Modules..................................................................................................................................................................... 24 
Installation Example ................................................................................................................................................................................ 25 
Product Features ....................................................................................................................................................................................... 27 
Chapter 2
 
Installation ....................................................................................................................................................... 32 
Installation Conditions ...................................................................................................................................................................................... 32 
Before Installation ............................................................................................................................................................................................... 33 
Product Appearance ............................................................................................................................................................................... 33 
Components ................................................................................................................................................................................................ 35 
Dimensions .................................................................................................................................................................................................. 38 
Installation Example ................................................................................................................................................................................ 45 
Step 1: Installing the Product ....................................................................................................................................................................... 47 
Mounting Accura 2300 on the Panel ............................................................................................................................................. 47 
Mounting Accura 2350-3P Power Measuring Modules on the Panel ........................................................................... 48 
Mounting Accura 2350-1P Power Measuring Module on the Panel ............................................................................. 55 
Mounting Accura 2350-3PSC Power Measuring Module on the Panel ....................................................................... 62 
Mounting Accura 2350-1PSC Power Measuring Module on the Panel ....................................................................... 67 
Mounting Accura 2350-1PSCSH Power Measuring Module on the Panel ................................................................. 72 
Step 2: Wiring Accura 2300 ........................................................................................................................................................................... 76 
Voltage Wiring of Accura 2300 ......................................................................................................................................................... 76 
Digital Input/Output Wiring of Accura 2300 ............................................................................................................................. 82 
Step 3: Through-hole Current Wiring of Accura 2350 ..................................................................................................................... 85 
Through-hole Wiring of Accura 2350-3P/3PSC Modules .................................................................................................... 85 
Through-hole Wiring of Accura 2350-1P/1PSH/1PSC Modules ....................................................................................... 89 
Through-hole Wiring of Accura 2350-1PSCSH Modules ..................................................................................................... 91 
Step 4: Connecting Accura 2350 with External ZCTs ........................................................................................................................ 94 
Step 5: Connecting Accura 2300 with Accura 2350 .......................................................................................................................... 95 
Step 6: Connecting Accura 2300 Devices for External Communication ................................................................................. 97 
Ethernet Communication ...................................................................................................................................................................... 97 
RS-485 Communication(Option) ....................................................................................................................................................... 99 
Step 7: Accura 2300 Power Supply and Ground Wiring ...............................................................................................................100 
Power Supply Wiring ............................................................................................................................................................................100 
Ground Wiring .........................................................................................................................................................................................100 

Accura 2300/2350 User Guide 
Contents 
 
ⓒ 2011 Rootech Inc. All Rights Reserved 
Page 11 
 
Chapter 3
 
Accura 2350 Operation/Setup .................................................................................................................... 101 
Operation Mode .....................................................................................................................................................................................101 
Button Operation ....................................................................................................................................................................................101 
Accura 2350-3P/3PSC .....................................................................................................................................................................................102 
Applied Model .........................................................................................................................................................................................102 
Front View ..................................................................................................................................................................................................102 
Display Mode ...........................................................................................................................................................................................103 
Setup Mode...............................................................................................................................................................................................105 
Accura 2350-1P/1PSC .....................................................................................................................................................................................119 
Applied Model .........................................................................................................................................................................................119 
Front View ..................................................................................................................................................................................................119 
Display Mode ...........................................................................................................................................................................................120 
Setup Mode...............................................................................................................................................................................................120 
Accura 2350-1PSCSH ......................................................................................................................................................................................129 
Applied Model .........................................................................................................................................................................................129 
Front View ..................................................................................................................................................................................................129 
Display Mode ...........................................................................................................................................................................................130 
Setup Mode...............................................................................................................................................................................................130 
Chapter 4 Accura 2300 Operation/Setup ..................................................................................................................... 141 
Device Configuration ......................................................................................................................................................................................141 
Operation Modes ...................................................................................................................................................................................141 
LED Display ................................................................................................................................................................................................141 
Button Operation ....................................................................................................................................................................................142 
Display Mode ......................................................................................................................................................................................................144 
Front View ..................................................................................................................................................................................................144 
Selecting the ID of Accura 2350 Module...................................................................................................................................146 
Full Display Screen .................................................................................................................................................................................147 
Measurement of Voltage/Current/Power/Energy ...................................................................................................................148 
Measurement of Voltage/Frequency ............................................................................................................................................149 
Measurement of Current ....................................................................................................................................................................149 
Measurement of Power/Power Factor ..........................................................................................................................................150 
Measurement of Demand ..................................................................................................................................................................150 
Measurement of Active Energy .......................................................................................................................................................151 
Measurement of Leakage Current .................................................................................................................................................151 
Ethernet Information ............................................................................................................................................................................152 
Temperature/Date & Time .................................................................................................................................................................153 
Setup Mode .........................................................................................................................................................................................................154 
Full Screen in Setup Mode ................................................................................................................................................................155 
Measurement Setup ..............................................................................................................................................................................156 
Event Setup ...............................................................................................................................................................................................162 
Accura 2350 Module ID Setup ........................................................................................................................................................172 

Contents 
 
Accura 2300/2350 User Guide 
 
Page 12 
ⓒ 2011 Rootech Inc. All Rights Reserved 
 
Accura 2350-1P Device Group Setup...........................................................................................................................................176 
Ethernet Communication Setup ......................................................................................................................................................179 
RS-485 Communication Setup ........................................................................................................................................................182 
Reset Configuration ...............................................................................................................................................................................184 
Digital Input/Output Setup ...............................................................................................................................................................186 
Display Setup ............................................................................................................................................................................................191 
Information ................................................................................................................................................................................................194 
Event Log Mode ................................................................................................................................................................................................196 
Start Event and End Event .................................................................................................................................................................196 
Providing Notifications for Start Events......................................................................................................................................196 
Clearing Event Notifications..............................................................................................................................................................196 
Button Operation ....................................................................................................................................................................................197 
Event Log Number .................................................................................................................................................................................198 
Event Timestamp ....................................................................................................................................................................................198 
Dip Event Log ...........................................................................................................................................................................................199 
Swell Event Log .......................................................................................................................................................................................199 
Fuse Fail Event Log ................................................................................................................................................................................200 
Temperature Event Log .......................................................................................................................................................................201 
Current Event Log ..................................................................................................................................................................................201 
Leakage Current Event Log ...............................................................................................................................................................202 
Demand Current Event Log...............................................................................................................................................................202 
No Event Log ............................................................................................................................................................................................203 
Necessary Steps for Device Setup ...........................................................................................................................................................204 
Step 1: Setup for the Voltage Wiring of Accura 2300 and PT Rating .........................................................................204 
Step 2: Automatic Assignment of Accura 2350 Module IDs and Update of IDs ..................................................205 
Step 3: Accura 2300 Ethernet Setup .............................................................................................................................................208 
Chapter 5
 
Measurements ............................................................................................................................................... 209 
General Measurement ....................................................................................................................................................................................209 
Measurement Event .........................................................................................................................................................................................211 
Voltage Wiring ....................................................................................................................................................................................................212 
3-Phase 4-Wire Connection ..............................................................................................................................................................212 
3-Phase 3-Wire Connection ..............................................................................................................................................................213 
1-Phase 3-Wire Connection ..............................................................................................................................................................215 
1-Phase 2-Wire Connection ..............................................................................................................................................................216 
Measurement of Voltage Dips(Sags)/Swells ........................................................................................................................................217 
Leakage Current Measurement ..................................................................................................................................................................218 
Residual Voltage Measurement .................................................................................................................................................................218 
Residual Current Measurement .................................................................................................................................................................218 
Measurement of Power Per Phase ...........................................................................................................................................................219 
Three-phase Power Measurement ...........................................................................................................................................................220 
Power Factor(PF) Measurement .................................................................................................................................................................221 

Accura 2300/2350 User Guide

Contents

Page 13

Phase Angle Measurement(Lead/Lag) ....................................................................................................................................................222

Demand Measurement...................................................................................................................................................................................223

Voltage Harmonics ...........................................................................................................................................................................................225

Current Harmonics ...........................................................................................................................................................................................225

Unbalance(NEMA MG1) .................................................................................................................................................................................225

Negative-Sequence/Zero-Sequence Unbalance ................................................................................................................................227

Aggregation .........................................................................................................................................................................................................228

Appendix A

Specifications ............................................................................................................................................. 231

Appendix B

Standards Compliance .............................................................................................................................. 241

IEC 61557-12:2018

Performance Measuring and Monitoring Devices(PMD) ........................................................242

IEC 62053-22:2020 Static Meters for AC Active Energy (Classes 0.1S, 0.2S and 0.5S)

...........................................244

IEC 62053-24:2020 Static Meters for Fundamental Reactive Energy (Classes 0.5S, 1S, 1, 2 and 3) ............244

Appendix C

Accuracy/Reliability ................................................................................................................................... 245

Accuracy ......................................................................................................................................................................................................245

Reliability .....................................................................................................................................................................................................246

Appendix D

Line-to-neutral Voltage for Common Main Supply Systems .................................................................... 247

Wiring Modes ...........................................................................................................................................................................................247

Appendix E

Ordering Information ................................................................................................................................ 248

Figures

Accura 2300/2350 User Guide

Page 14

Figures

Fig 1.1 Through-hole Type Current Sensing Structure of Accura 2350-3P/1P Module ....................................... 19

Fig 1.2 Accura 2350 Module Compatible with MCCBs/ELBs .............................................................................................. 20

Fig 1.3 Installation of Accura 2350-3PSC Module ................................................................................................................... 20

Fig 1.4 Installation Example of Accura 2300/2350 Modules .............................................................................................. 25

Fig 1.5 Installation Example of Split-core Power Measuring Modules .......................................................................... 26

Fig 2.1 Accura 2300 Front .................................................................................................................................................................... 33

Fig 2.2 Accura 2300 Side ...................................................................................................................................................................... 33

Fig 2.3 Accura 2300 Rear...................................................................................................................................................................... 33

Fig 2.4 Accura 2350-3P/1P Power Measuring Modules ....................................................................................................... 34

Fig 2.5 Accura 2350-3PSC/1PSC/1PSCSH Split-core Power Measuring Modules ................................................... 34

Fig 2.6 Accura 2300 Components .................................................................................................................................................... 35

Fig 2.7 Accura 2350-3P Components ............................................................................................................................................ 35

Fig 2.8 Accura 2350-1P Components ............................................................................................................................................ 35

Fig 2.9 Accura 2350-1PSH Components ...................................................................................................................................... 36

Fig 2.10 Accura 2350-3PSC Components .................................................................................................................................... 36

Fig 2.11 Accura 2350-1PSC Components .................................................................................................................................... 36

Fig 2.12 Accura 2350-1PSCSH Components .............................................................................................................................. 37

Fig 2.13 TM-3P Components ............................................................................................................................................................. 37

Fig 2.14 TM-1P Components ............................................................................................................................................................. 37

Fig 2.15 Accura 2300 Front Dimensions ....................................................................................................................................... 38

Fig 2.16 Accura 2300 Side Dimensions ......................................................................................................................................... 38

Fig 2.17 Accura 2300 Rear Dimensions ........................................................................................................................................ 38

Fig 2.18 Accura 2350-3P Module Dimensions .......................................................................................................................... 39

Fig 2.19 TM-3P Terminal Block Dimensions ............................................................................................................................... 39

Fig 2.20 Accura 2350-1P Module Dimensions .......................................................................................................................... 40

Fig 2.21 Accura 2350-1PSH Module Dimensions .................................................................................................................... 40

Fig 2.22 TM-1P Terminal Block Dimensions ............................................................................................................................... 41

Fig 2.23 Accura 2350-3PSC Module Dimensions ..................................................................................................................... 42

Fig 2.24 Accura 2350-1PSC Module Dimensions ..................................................................................................................... 43

Fig 2.25 Accura 2350-1PSCSH Module Dimensions ............................................................................................................... 43

Fig 2.26 Installation Diagram of Accura 2300/2350-3P/1P Power Measuring Modules ...................................... 45

Fig 2.27 Installation Diagram of Accura 2300/2350 Split-core Power Measuring Modules .............................. 46

Fig 2.28 Mounting Accura 2300 on the Panel .......................................................................................................................... 47

Fig 2.29 Mounting Accura 2350-3P Power Measuring Module on the Panel .......................................................... 48

Accura 2300/2350 User Guide 
Figures 
 
ⓒ 2011 Rootech Inc. All Rights Reserved 
Page 15 
 
Fig 2.30 Mounting Accura 2350-3P Module on the Panel through Mounting Holes .......................................... 49 
Fig 2.31 Mounting the Mounting Plate/Terminal Block for Accura 2350-3P on the Panel ............................... 53 
Fig 2.32 Mounting Accura 2350-1P Module on the Panel(Load Located on the Right Side) .......................... 55 
Fig 2.33 Mounting Accura 2350-1P Module on the Panel through Mounting Holes .......................................... 56 
Fig 2.34 Mounting the Mounting Plate/Terminal Block for Accura 2350-1P on the Panel ............................... 60 
Fig 2.35 Mounting Accura 2350-3PSC Module on the Panel (New Installation) .................................................... 62 
Fig 2.36 Mounting Accura 2350-3PSC Module on the Panel through Mounting Holes..................................... 63 
Fig 2.37 Mounting the Mounting Plate for Accura 2350-3PSC Module on the Panel ......................................... 65 
Fig 2.38 Mounting Accura 2350-3PSC Module on the Panel(Installation) ................................................................. 66 
Fig 2.39 Mounting Accura 2350-1PSC Module on the Panel (New Installation) .................................................... 67 
Fig 2.40 Mounting Accura 2350-1PSC Module on the Panel through Mounting Holes..................................... 68 
Fig 2.41 Mounting the Mounting Plate for Accura 2350-1PSC Module on the Panel ......................................... 70 
Fig 2.42 Mounting Accura 2350-1PSC Module in the Existing Panel ........................................................................... 71 
Fig 2.43 Mounting Accura 2350-1PSCSH Module on the Panel (New Installation) .............................................. 72 
Fig 2.44 Mounting Accura 2350-1PSCSH Module on the Panel through Mounting Holes............................... 73 
Fig 2.45 Mounting the Mounting Plate for Accura 2350-1PSCSH Module on the Panel ................................... 74 
Fig 2.46 Mounting Accura 2350-1PSCSH Module on the Panel (Retrofit Installation) ........................................ 75 
Fig 2.47 Voltage Wiring of Accura 2300....................................................................................................................................... 76 
Fig 2.48 3-phase 4-wire, Direct Connection ............................................................................................................................... 78 
Fig 2.49 3-phase 4-wire Connection 3 PTs ................................................................................................................................. 78 
Fig 2.50 3-phase 3-wire, Direct Connection ............................................................................................................................... 79 
Fig 2.51 Three-phase 3-wire Connection with 2 PTs ............................................................................................................. 79 
Fig 2.52 Single-phase 3-wire, Direct Connection ..................................................................................................................... 80 
Fig 2.53 Single-phase 3-wire Connection with 2 PTs ............................................................................................................ 80 
Fig 2.54 Single-phase 2-wire, Direct Connection ..................................................................................................................... 81 
Fig 2.55 Single-phase 2-wire Connection with 1 PT .............................................................................................................. 81 
Fig 2.56 Digital Input/Output Channels on Accura 2300 .................................................................................................... 82 
Fig 2.57 Digital Input .............................................................................................................................................................................. 83 
Fig 2.58 Application of DC Relay ..................................................................................................................................................... 84 
Fig 2.59 Application of AC Relay ...................................................................................................................................................... 84 
Fig 2.60 3P4W/3P3W Through-hole Wiring ............................................................................................................................... 86 
Fig 2.61 3P4W/3P3W Through-hole Wiring with 3 CTs ....................................................................................................... 86 
Fig 2.62 3P3W Through-hole Wiring with 2 CTs ...................................................................................................................... 87 
Fig 2.63 3P4W Through-hole Wiring for 1P2F Measurement ........................................................................................... 88 
Fig 2.64 Single-phase Line-to-neutral Through-hole Wiring ............................................................................................. 90 
Fig 2.65 Single-phase Line-to-line Through-hole Wiring .................................................................................................... 90 

Figures 
 
Accura 2300/2350 User Guide 
 
Page 16 
ⓒ 2011 Rootech Inc. All Rights Reserved 
 
Fig 2.66 Grouping Three Accura 2350-1PSCSH Modules in 3P4W/3P3W Mode .................................................... 92 
Fig 2.67 Grouping Two Accura 2350-1PSCSH Modules in 3P3W Mode ..................................................................... 92 
Fig 2.68 Single-phase Line-to-neutral Through-hole Wiring of Single-hole Module ........................................... 93 
Fig 2.69 Single-phase Line-to-line Through-hole Wiring of Single-hole Module .................................................. 93 
Fig 2.70 Connecting the Cable for Connection with the ZCT with the External ZCT ........................................... 94 
Fig 2.71 Connecting Accura 2350 Module with the External ZCT .................................................................................. 94 
Fig 2.72 Example of Connecting Accura 2300 to Accura 2350 for Dedicated Communication ...................... 95 
Fig 2.73 Ethernet Communication Port ㄴ  on Accura 2300 ............................................................................................... 97 
Fig 2.74 Connecting Accura 2300 Devices via Ethernet Communication ................................................................... 98 
Fig 2.75 RS-485 Communication Port on Accura 2300 (Option) ..................................................................................... 99 
Fig 2.76 Connecting Accura 2300 Devices via RS-485 Communication ...................................................................... 99 
Fig 2.77 Accura 2300 Power Supply Wiring .............................................................................................................................100 
Fig 4.1 Accura 2300 Front View ......................................................................................................................................................141 
Fig 4.2 Screen in Display Mode ......................................................................................................................................................142 
Fig 4.3 Screen in Setup Mode .........................................................................................................................................................142 
Fig 4.4 Screen in Event Log Mode ................................................................................................................................................143 
Fig 4.5 Accura 2300 Front View ......................................................................................................................................................144 
Fig 4.6 Temperature Sensor on Accura 2300 ...........................................................................................................................145 
Fig 4.7 Selecting the ID of Accura 2350 Module ...................................................................................................................146 
Fig 4.8 Voltage/Current/Power/Energy Display Screen .......................................................................................................148 
Fig 4.9 Voltage/Current/Power/Energy Display Screen for Each Phase ......................................................................148 
Fig 4.10 Line-to-line Voltage Display Screen ...........................................................................................................................149 
Fig 4.11 Phase Current Display Screen........................................................................................................................................149 
Fig 4.12 Active Power Display Screen ..........................................................................................................................................150 
Fig 4.13 Active Power Demand Display Screen ......................................................................................................................150 
Fig 4.14 Net Energy Display Screen ..............................................................................................................................................151 
Fig 4.15 Leakage Current Display Screen...................................................................................................................................151 
Fig 4.16 Ethernet Connection Status Display Screen ...........................................................................................................152 
Fig 4.17 Temperature Display Screen ...........................................................................................................................................153 
Fig 4.18 3-phase 4-wire Connection(3P4W): Setup for PT Primary VL12 & Secondary V12 Values ................156 
Fig 4.19 3-phase 3-wire Connection(3P3W): Setup for PT Primary VL12 & Secondary V12 Values ...............157 
Fig 4.20 1-phase 3-wire Connection(1P3W): Setup for PT Primary VL12 & Secondary V13 Values ................157 
Fig 4.21 1-phase 2-wire Connection(1P2W): Setup for PT Primary VL1 & Secondary V1N Values .................157 
Fig 4.22 Dip Event Setup(3-phase 4-wire) .................................................................................................................................163 
Fig 4.23 Dip Event Setup(3-phase 3-wire) .................................................................................................................................163 
Fig 4.24 Swell Event Setup(3-phase 4-wire) .............................................................................................................................165 

Accura 2300/2350 User Guide

Figures

Page 17

Fig 4.25 Swell Event Setup(3-phase 3-wire) .............................................................................................................................165

Fig 4.26 Dip(Sag) Event Notification Screen.............................................................................................................................196

Fig 4.27 Swell Event Notification Screen ....................................................................................................................................196

Fig 4.28 Example of Event Log Number .....................................................................................................................................198

Fig 5.1 3P4W Connection with 3 PTs and 3 CTs ....................................................................................................................212

Fig 5.2 3P3W Connection with 2 PTs and 3 CTs ....................................................................................................................213

Fig 5.3 1P3W Connection with 2 PTs and 2 CTs ....................................................................................................................215

Fig 5.4 1P2W Connection with 1 PT and 1 CT ........................................................................................................................216

Fig 5.5 Calculation of 1-cycle RMS Voltage Refreshed Each Half Cycle ....................................................................217

Fig 5.6 Voltage Dip(Sag) Detection ...............................................................................................................................................217

Fig 5.7 Vector Sum for the Total Apparent Power ................................................................................................................220

Fig 5.8 Arithmetic Sum for the Total Apparent Power ........................................................................................................221

Fig 5.9 PF Sign and Phase Angle(Lead/Lag) .............................................................................................................................222

Fig 5.10 Demand Calculation ...........................................................................................................................................................223

Fig 5.11 Predicted Demand Calculation .....................................................................................................................................223

Fig 5.12 Hourly Auto Sync .................................................................................................................................................................224

Fig 5.13 Manual Sync ...........................................................................................................................................................................224

Fig 5.14 Symmetrical Components................................................................................................................................................227

Fig 5.15 Aggregation Process for Avg/Max/Min Values .....................................................................................................228

Fig 5.16 Aggregation Process for the Last Latched Values ..............................................................................................228

Chapter 1 Introduction

Accura 2300/2350 User Guide

Page 18

Chapter 1

Introduction

Overview

Paradigm Shift in Energy Management

When energy costs were low, energy management mainly focused on controlling the total energy supply

to all loads using switchgear panels, including incoming feeders and ABS panels for stable power supply.

However, carbon pricing policies have been implemented since 2015, and energy costs have sharply

increased. This has resulted in a rapidly growing need to manage energy usage on individual branch

loads in distribution panels at various industrial facilities, manufacturing plants, IDC centers, etc.

Limits in Applying Digital Power Meters Used in Switchgear Panels to Distribution Panels

Installing digital power meters used in existing switchgear panels at distribution panels entails limitations,

such as narrow installation space, electrical hazards arising from the voltage and current wiring process,

and high installation costs. It makes it difficult for energy managers to access energy data on individual

branch loads and devise practical energy efficiency measures for each branch load.

Power Meters Specialized for Managing Major Branch Loads

The distribution panel digital power meter product line includes Accura 2300 installed on the front of

distribution panels(including MCC panels) and Accura 2350 installed at individual branch loads inside

distribution panels. Accura 2300 collects power data from multiple Accura 2350 modules via internal

communication and displays measurement data for each branch load. This enables energy managers to

check power data on individual branch loads in distribution panels, which were unavailable with the

existing digital power meters installed at switchgear panels.

Accurate Measurements: ±0.2 %/±0.5 %1 of Reading(Voltage/Current) and Class 0.5S /

Class 0.2S 2 (Active Energy)

Due to greenhouse gas emission regulations, it has recently become essential to establish enterprise-

wide energy management systems for efficient energy usage at sites such as plants, manufacturing

factories, and buildings. A key factor determining the reliability of energy management systems is the

measurement accuracy of meters. Accura 2300/2350 perform accurate voltage/current measurements with

±0.2/±0.5 %1 of reading accuracy. It also meets IEC 62053-22 Class 0.5S/Class 0.2S2 standards for active

energy measurement. Thus, this allows for accurate analysis and diagnosis of various problems in energy

management at power facilities.

1.Accura 2350-3PSC/1PSC modules have ±0.5 % of reading accuracy for current measurement, and the maximum

accuracy error of ±1 % may occur according to the position of the holes

cables pass through.

2. Accura 2350-1PSCSH modules meet IEC 62053-22 Class 0.2S standards for active energy measurement.

Accura 2300/2350 User Guide

Chapter 1 Introduction

Page 19

A Variety of Data including Dip(Sag)/Swell Available for Power Quality Analysis

Accura 2300/2350 provide a variety of data, including dips(sags), swells and harmonics(up to the 50th

order), crest factor, K-factor, and unbalance for power quality analysis. It allows energy managers to easily

identify changes in power quality in various distribution panels at power facilities, enabling effective

power quality management.

Maximum/Minimum/Average Values Available within an Aggregation Interval

Accura 2300/2350 calculate the average of the data collected every 0.5 seconds based on the data

measured over one cycle for various parameters, including voltage, current, and power. Based on this

data, it also provides the maximum/minimum/average values for various aggregation intervals, including

1 second, 5 seconds, 1 minute, 5 minutes, 1 hour and 6 hours. A measurement interval longer than 0.5

seconds refers to an aggregation interval.

Via communication, Accura 2300/2350 provide not only the average value for the 0.5-second interval but

also the maximum/minimum/average values for each aggregation interval and timestamped data for the

max/min values. Since it includes measurement data that change instantaneously during aggregation

intervals, it allows for accurate trend analysis of voltage, current and power quality.

Proven Safety and Reliability with CE/UL Certifications

The internal and external structures(product and circuit design) of Accura 2300/2350 meet safety and

reliability requirements for CE(EN 55011, EN IEC 61326-1, EN IEC 61326-2-1, EN IEC 61000-3-2, EN 61000-

3-3) and UL(UL 61010-1 3rd edition, UL 61010-2-030) standards.

Through-hole Type Structure for Easier and Safer Installation

Accura 2350-3P/1P power measuring modules feature the through-hole type current sensing structure

that does not require electrical contact with cables or busbars. Therefore, it ensures safety from electrical

accidents, as well as easy installations. The TM-3P terminal block also allows for easier electrical wiring.

Fig 1.1 Through-hole Type Current Sensing Structure of Accura 2350-3P/1P Module

Chapter 1 Introduction

Accura 2300/2350 User Guide

Page 20

Compatible with MCCBs/ELBs with Various Ratings

Accura 2350-3P/1P power measuring modules are compatible with MCCBs/ ELBs with a range of current

ratings since they have identical installation dimensions and wiring hole positions. Thus, when installing

the products, it is possible to integrate them into the existing MCCBs/ELBs in distribution panels.

Fig 1.2 Accura 2350 Module Compatible with MCCBs/ELBs

Split-core Structure Enabling Device Installation on Live Wires (Applicable for Split-core

Modules)

Accura 2350-3PSC/1PSC/1PSCSH modules feature the split-core structure. It allows for the easy installation

of the products on live wires without the need to cut off power.

Fig 1.3 Installation of Accura 2350-3PSC Module

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ROOTECH Accura 2300/2350 User guide

ROOTECH Accura 2300/2350 User guide

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