ROOTECH Accura 2300S/2350 User guide

Digital Power Meter

Accura 2300S front

Accura 2300S 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

Three-Phase Split-Core

Power Measuring Module

Single-Phase Split-Core

Power Measuring Module

Single-Phase Split-Core 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 Module

Accura 2350-GAS

Accura 2350-GW

Accura 2350-TEMP

Accura TSEN/THSEN

Accura 2350-TEMPS

Accura 2350-DO

Accura 2350-IDC

Accura 2350-VDC

Accura 2350-DCM-50V-80A

Accura 2350-DCM-500V-80A

Accura 2300S/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 2300S/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 2300S/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 2300S/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-ACCURA2300S

Energy-usage Monitor

E522977

Accura 2300S/2350 User Guide

Revision History

Page 9

Revision History

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

Revision

Date

Description

Revision 2.00

February 16, 2022

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

higher than 200.00

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

September 18, 2023

Changed the harmonic order range needed to calculate voltage THD up

to the 50th order

Changed the description of data aggregation

Changed specifications for power supply and voltage measurements

Added information on the renewed UL certification

Corrected errors in wiring diagrams

Revision 2.20

November 22, 2023

Added information on Accura THSEN connected to Accura 2350-TEMP

Contents 
 
Accura 2300S/2350 User Guide 
 
Page 10 
ⓒ 2011 Rootech Inc. All Rights Reserved 
 
Contents 
Chapter 1
 
Introduction ..................................................................................................................................................... 18 
Overview .................................................................................................................................................................................................................. 18 
Applications ........................................................................................................................................................................................................... 21 
Product Information .......................................................................................................................................................................................... 22 
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 2300S 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 2300S ........................................................................................................................................................................ 76 
Voltage Wiring of Accura 2300S ...................................................................................................................................................... 76 
Digital Input / Output Wiring of Accura 2300S........................................................................................................................ 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 2300S with Accura 2350 ....................................................................................................................... 95 
Step 6: Connecting Accura 2300S Devices for External Communication ............................................................................... 97 
Ethernet Communication ...................................................................................................................................................................... 97 
RS-485 Communication ........................................................................................................................................................................ 99 
Step 7: Accura 2300S Power Supply and Ground Wiring ............................................................................................................100 
Power Supply Wiring ............................................................................................................................................................................100 
Ground Wiring .........................................................................................................................................................................................100 

Accura 2300S/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 2300S 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 .................................................................................................................................................................................148 
Measurement of Voltage/Current/Power/Energy ...................................................................................................................149 
Measurement of Voltage/Frequency ............................................................................................................................................150 
Measurement of Current ....................................................................................................................................................................150 
Measurement of Power/Power Factor ..........................................................................................................................................151 
Measurement of Demand ..................................................................................................................................................................151 
Measurement of Active Energy .......................................................................................................................................................152 
Measurement of Leakage Current .................................................................................................................................................152 
Ethernet Information ............................................................................................................................................................................153 
Temperature/Date & Time .................................................................................................................................................................154 
Setup Mode .........................................................................................................................................................................................................155 
Full Screen in Setup Mode ................................................................................................................................................................156 
Measurement Setup ..............................................................................................................................................................................157 
Event Setup ...............................................................................................................................................................................................163 
Accura 2350 Module ID Setup ........................................................................................................................................................173 

Contents 
 
Accura 2300S/2350 User Guide 
 
Page 12 
ⓒ 2011 Rootech Inc. All Rights Reserved 
 
Accura 2350-1P Device Group Setup...........................................................................................................................................177 
Ethernet Communication Setup ......................................................................................................................................................180 
RS-485 Communication Setup ........................................................................................................................................................183 
Reset Configuration ...............................................................................................................................................................................185 
Digital Input/Output Setup ...............................................................................................................................................................187 
Display Setup ............................................................................................................................................................................................192 
Information ................................................................................................................................................................................................195 
Event Mode ..........................................................................................................................................................................................................196 
Start Event and End Event .................................................................................................................................................................196 
Providing Notifications for Start Events......................................................................................................................................196 
Clearing Event Notifications..............................................................................................................................................................196 
Button Function .......................................................................................................................................................................................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...............................................................................................................................................................203 
Power Event Log .....................................................................................................................................................................................204 
No Event Log ............................................................................................................................................................................................204 
Necessary Steps for Device Setup ...........................................................................................................................................................205 
Step 1: Setup for the Voltage Wiring of Accura 2300S and PT Rating ......................................................................205 
Step 2: Automatic Assignment of Accura 2350 Module IDs and Update of IDs ..................................................206 
Step 3: Ethernet Setup of Accura 2300S ....................................................................................................................................209 
Chapter 5
 
Measurements ............................................................................................................................................... 210 
General Measurement ....................................................................................................................................................................................210 
Measurement Event .........................................................................................................................................................................................212 
Voltage Wiring ....................................................................................................................................................................................................213 
3-Phase 4-Wire Connection ..............................................................................................................................................................213 
3-Phase 3-Wire Connection ..............................................................................................................................................................214 
1-Phase 3-Wire Connection ..............................................................................................................................................................216 
1-Phase 2-Wire Connection ..............................................................................................................................................................217 
Measurement of Voltage Dips(Sags)/Swells ........................................................................................................................................218 
Leakage Current Measurement ..................................................................................................................................................................219 
Residual Voltage Measurement .................................................................................................................................................................219 
Residual Current Measurement .................................................................................................................................................................219 
Measurement of Power Per Phase ...........................................................................................................................................................220 
Three-Phase Power Measurement ............................................................................................................................................................221 

Accura 2300S/2350 User Guide

Contents

Page 13

Power Factor(PF) Measurement .................................................................................................................................................................222

Phase Angle Measurement(Lead/Lag) ....................................................................................................................................................223

Demand Measurement...................................................................................................................................................................................224

Voltage Harmonics ...........................................................................................................................................................................................226

Current Harmonics ...........................................................................................................................................................................................226

Unbalance(NEMA MG1) .................................................................................................................................................................................226

Negative-Sequence/Zero-Sequence Unbalance ................................................................................................................................228

Aggregation .........................................................................................................................................................................................................229

Appendix A

Specifications ............................................................................................................................................. 232

Appendix B

Standards Compliance .............................................................................................................................. 242

IEC 61557-12:2018

Performance Measuring and Monitoring Devices(PMD) ........................................................243

IEC 62053-22:2020 Static Meters for AC Active Energy (Classes 0.1S, 0.2S and 0.5S) .......................................245

IEC 62053-24:2020 Static Meters for Fundamental Reactive Energy (Classes 0.5S, 1S, 1, 2 and 3) ............245

Appendix C

Accuracy/Reliability ................................................................................................................................... 246

Accuracy ......................................................................................................................................................................................................246

Reliability .....................................................................................................................................................................................................247

Appendix D

Line-to-Neutral Voltage for Common Main Supply Systems ................................................................... 248

Wiring Modes ...........................................................................................................................................................................................248

Appendix E

Ordering Information ................................................................................................................................ 249

Figures

Accura 2300S/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 with Various Ratings ................................................ 20

Fig 1.3 Installation of Accura 2350-3PSC/1PSC Module ...................................................................................................... 20

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

Fig 1.5 Installation Example of Split-Core Power Measuring Module ........................................................................... 26

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

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

Fig 2.3 Accura 2300S 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 2300S 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 2300S Front Dimensions .................................................................................................................................... 38

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

Fig 2.17 Accura 2300S 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 2.22 Accura 2350-1PSH Module Dimensions .................................................................................................................... 40

Fig 2.21 TM-1P Single-phase 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 2300S/2350-3P/1P Power Measuring Modules ................................... 45

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

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

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

Accura 2300S/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 (Retrofit 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 on the Panel (Retrofit Installation)............................................... 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 2300S .................................................................................................................................... 76 
Fig 2.48 3-Phase 4-Wire, Direct Connection .............................................................................................................................. 78 
Fig 2.49 3-Phase 4-Wire Connection with 3 PTs ...................................................................................................................... 78 
Fig 2.50 3-Phase 3-Wire, Direct Connection .............................................................................................................................. 79 
Fig 2.51 3-Phase 3-Wire Connection with 2 PTs ...................................................................................................................... 79 
Fig 2.52 1-Phase 3-Wire, Direct Connection .............................................................................................................................. 80 
Fig 2.53 1-Phase 3-Wire Connection with 2 PTs ...................................................................................................................... 80 
Fig 2.54 1-Phase 2-Wire, Direct Connection .............................................................................................................................. 81 
Fig 2.55 1-Phase 2-Wire Connection with 1 PT ........................................................................................................................ 81 
Fig 2.56 Digital Input / Output Channels on Accura 2300S .............................................................................................. 82 
Fig 2.57 Digital Inputs ............................................................................................................................................................................ 82 
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 2.64 Single-Phase Line-to-Neutral Through-Hole Wiring ........................................................................................... 90 
Fig 2.65 Single-Phase Line-to-Line Through-Hole Wiring .................................................................................................. 90 
Fig 2.66 Grouping Three Accura 2350-1PSCSH Modules in 3P4W/3P3W Mode .................................................... 92 

Figures 
 
Accura 2300S/2350 User Guide 
 
Page 16 
ⓒ 2011 Rootech Inc. All Rights Reserved 
 
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 to the External ZCT ................................................ 94 
Fig 2.71 Connecting Accura 2350 Module to the External ZCT ....................................................................................... 94 
Fig 2.72 Example of Connecting Accura 2300S to Accura 2350 for Dedicated Communication ................... 95 
Fig 2.73 Ethernet Communication Ports on Accura 2300S ................................................................................................. 97 
Fig 2.74 Connecting Accura 2300S Devices via Ethernet Communication ................................................................. 98 
Fig 2.75 RS-485 Communication Port on Accura 2300S ..................................................................................................... 99 
Fig 2.76 Connecting Accura 2300S Devices via RS-485 Communication.................................................................... 99 
Fig 2.77 Accura 2300S Power Supply Wiring ...........................................................................................................................100 
Fig 4.1 Accura 2300S 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 Mode ..........................................................................................................................................................143 
Fig 4.5 Accura 2300S Front View ...................................................................................................................................................144 
Fig 4.6 Temperature Sensor on Accura 2300S ........................................................................................................................145 
Fig 4.7 Selecting the ID of Accura 2350 Module ...................................................................................................................146 
Fig 4.8 Voltage/Current/Power/Energy Display Screen .......................................................................................................149 
Fig 4.9 Voltage/Current/Power/Energy Display Screen for Each Phase ......................................................................149 
Fig 4.10 Line-to-line Voltage Display Screen ...........................................................................................................................150 
Fig 4.11 Phase Current Display Screen........................................................................................................................................150 
Fig 4.12 Active Power Display Screen ..........................................................................................................................................151 
Fig 4.13 Active Power Demand Display Screen ......................................................................................................................151 
Fig 4.14 Net Energy Display Screen ..............................................................................................................................................152 
Fig 4.15 Leakage Current Display Screen...................................................................................................................................152 
Fig 4.16 Ethernet Connection Status Display Screen ...........................................................................................................153 
Fig 4.17 Temperature Display Screen ...........................................................................................................................................154 
Fig 4.18 3-Phase 4-Wire Connection(3P4W): Setup for PT Primary VL12 & Secondary V12 Values ...............157 
Fig 4.19 3-Phase 3-Wire Connection(3P3W): Setup for PT Primary VL12 & Secondary V12 ..............................158 
Fig 4.20 1-Phase 3-Wire Connection(1P3W): Setup for PT Primary VL12 & Secondary V13 ..............................158 
Fig 4.21 1-Phase 2-Wire Connection(1P2W): Setup for PT Primary VL1 &    Secondary V1N ............................158 
Fig 4.22 Dip Event Setup(3-Phase 4-Wire) ................................................................................................................................164 
Fig 4.23 Dip Event Setup(3-Phase 3-Wire) ................................................................................................................................164 
Fig 4.24 Swell Event Setup(3-Phase 4-Wire).............................................................................................................................166 
Fig 4.25 Swell Event Setup(3-Phase 3-Wire).............................................................................................................................166 

Accura 2300S/2350 User Guide

Figures

Page 17

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 ....................................................................................................................213

Fig 5.2 3P3W Connection with 2 PTs and 3 CTs ....................................................................................................................214

Fig 5.3 1P3W Connection with 2 PTs and 2 CTs ....................................................................................................................216

Fig 5.4 1P2W Connection with 1 PT and 1 CT ........................................................................................................................217

Fig 5.5 Calculation of 1-cycle RMS Voltage Refreshed Each Half Cycle ....................................................................218

Fig 5.6 Voltage Dip(Sag) Detection ...............................................................................................................................................218

Fig 5.7 Vector Sum for the Total Apparent Power ................................................................................................................221

Fig 5.8 Arithmetic Sum for the Total Apparent Power ........................................................................................................222

Fig 5.9 PF Sign and Phase Angle(Lead/Lag) .............................................................................................................................223

Fig 5.10 Demand Calculation ...........................................................................................................................................................224

Fig 5.11 Predicted Demand Calculation .....................................................................................................................................224

Fig 5.12 Hourly Auto Sync .................................................................................................................................................................225

Fig 5.13 Manual Sync ...........................................................................................................................................................................225

Fig 5.14 Symmetrical Components................................................................................................................................................228

Fig 5.15 Aggregation Process for Avg/Max/Min Values .....................................................................................................229

Fig 5.16 Aggregation Process for the Last Latched Values ..............................................................................................229

Chapter 1 Introduction

Accura 2300S/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 industrial control panels at various industrial facilities, manufacturing plants, IDC centers, etc.

Limit 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 digital power meter product line includes Accura 2300S installed on the front of industrial control

panels, including MCC panels and Accura 2350 installed at individual branch loads inside the panels.

Accura 2300S collects power data from multiple Accura 2350 modules via internal communication and

displays measurement data on each branch load. This enables energy managers to check power data on

individual branch loads in industrial control panels, which were unavailable with the existing digital power

meters installed at switchgear panels.

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

0.2S (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 2300S/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 0.2S 2 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 2300S/2350 User Guide

Chapter 1 Introduction

Page 19

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

Accura 2300S/2350 provide a variety data, including dips(sags), swells and harmonics(up to 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 industrial control panels at power facilities, enabling effective power

quality management.

Maximum/Minimum/Average Values Available within an Aggregation Interval

Accura 2300S/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 2300S/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/KC Certifications

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

reliability requirements for CE (EN 55011:2009/A1:2010, EN IEC 61326-1:2021, EN IEC 61326-2-1:2021, EN

IEC 61000-3-2:2019/A1:2021, EN 61000-3-3:2013/A2:2021), UL (UL 61010-1 3rd edition, UL 61010-2-030),

and KC (EN 55011:2009/A1:2010, EN IEC 61326-1:2021, EN IEC 61326-2-1:2021) 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 2300S/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 industrial control panels.

Fig 1.2 Accura 2350 Module Compatible with MCCBs/ELBs with Various Ratings

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/1PSC Module

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ROOTECH Accura 2300S/2350 User guide

ROOTECH Accura 2300S/2350 User guide

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