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 auxiliary power supply voltage indicated on the product is observed: AC 85 – 265 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

Energy-usage Monitor

E522977

MSIP-REM-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

Contents 
 
Accura 2300/2350 User Guide 
 
Page 10 
ⓒ 2011 Rootech Inc. All Rights Reserved 
 
Contents 
Chapter 1
 
Introduction ..................................................................................................................................................... 18 
Overview .................................................................................................................................................................................................................. 18 
Applications ........................................................................................................................................................................................................... 22 
Product Information .......................................................................................................................................................................................... 23 
Distribution Panel Digital Meter/Power Measuring Module .............................................................................................. 23 
Special-purpose Modules..................................................................................................................................................................... 25 
Installation Example ................................................................................................................................................................................ 26 
Product Features ....................................................................................................................................................................................... 29 
Chapter 2
 
Installation ....................................................................................................................................................... 34 
Installation Conditions ...................................................................................................................................................................................... 34 
Before Installation ............................................................................................................................................................................................... 35 
Product Appearance ............................................................................................................................................................................... 35 
Components ................................................................................................................................................................................................ 37 
Dimensions .................................................................................................................................................................................................. 40 
Installation Example ................................................................................................................................................................................ 47 
Step 1: Installing the Product ....................................................................................................................................................................... 49 
Mounting Accura 2300 on the Panel ............................................................................................................................................. 49 
Mounting Accura 2350-3P Power Measuring Modules on the Panel ........................................................................... 50 
Mounting Accura 2350-1P Power Measuring Module on the Panel ............................................................................. 57 
Mounting Accura 2350-3PSC Power Measuring Module on the Panel ....................................................................... 64 
Mounting Accura 2350-1PSC Power Measuring Module on the Panel ....................................................................... 69 
Mounting Accura 2350-1PSCSH Power Measuring Module on the Panel ................................................................. 74 
Step 2: Wiring Accura 2300 ........................................................................................................................................................................... 78 
Voltage Wiring of Accura 2300 ......................................................................................................................................................... 78 
Digital Input/Output Wiring of Accura 2300 ............................................................................................................................. 84 
Step 3: Through-hole Current Wiring of Accura 2350 ..................................................................................................................... 87 
Through-hole Wiring of Accura 2350-3P/3PSC Modules .................................................................................................... 87 
Through-hole Wiring of Accura 2350-1P/1PSH/1PSC Modules ....................................................................................... 91 
Through-hole Wiring of Accura 2350-1PSCSH Modules ..................................................................................................... 93 
Step 4: Connecting Accura 2350 with External ZCTs ........................................................................................................................ 96 
Step 5: Connecting Accura 2300 with Accura 2350 .......................................................................................................................... 98 
Step 6: Connecting Accura 2300 Devices for External Communication ...............................................................................100 
Ethernet Communication ....................................................................................................................................................................100 
RS-485 Communication(Option) .....................................................................................................................................................102 
Step 7: Accura 2300 Power Supply and Ground Wiring ...............................................................................................................104 
Power Supply Wiring ............................................................................................................................................................................104 
Ground Wiring .........................................................................................................................................................................................104 

Accura 2300/2350 User Guide 
Contents 
 
ⓒ 2011 Rootech Inc. All Rights Reserved 
Page 11 
 
Chapter 3
 
Accura 2350 Operation/Setup .................................................................................................................... 105 
Operation Mode .....................................................................................................................................................................................105 
Button Operation ....................................................................................................................................................................................105 
Accura 2350-3P/3PSC .....................................................................................................................................................................................106 
Applied Model .........................................................................................................................................................................................106 
Front View ..................................................................................................................................................................................................106 
Display Mode ...........................................................................................................................................................................................107 
Setup Mode...............................................................................................................................................................................................109 
Accura 2350-1P/1PSC .....................................................................................................................................................................................123 
Applied Model .........................................................................................................................................................................................123 
Front View ..................................................................................................................................................................................................123 
Display Mode ...........................................................................................................................................................................................124 
Setup Mode...............................................................................................................................................................................................124 
Accura 2350-1PSCSH ......................................................................................................................................................................................133 
Applied Model .........................................................................................................................................................................................133 
Front View ..................................................................................................................................................................................................133 
Display Mode ...........................................................................................................................................................................................134 
Setup Mode...............................................................................................................................................................................................134 
Chapter 4
 
Accura 2300 Operation/Setup .................................................................................................................... 145 
Device Configuration ......................................................................................................................................................................................145 
Operation Modes ...................................................................................................................................................................................145 
LED Display ................................................................................................................................................................................................145 
Button Operation ....................................................................................................................................................................................146 
Display Mode ......................................................................................................................................................................................................148 
Front View ..................................................................................................................................................................................................148 
Selecting the ID of Accura 2350 Module...................................................................................................................................150 
Full Display Screen .................................................................................................................................................................................152 
Measurement of Voltage/Current/Power/Energy ...................................................................................................................153 
Measurement of Voltage/Frequency ............................................................................................................................................153 
Measurement of Current ....................................................................................................................................................................154 
Measurement of Power/Power Factor ..........................................................................................................................................154 
Measurement of Demand ..................................................................................................................................................................155 
Measurement of Active Energy .......................................................................................................................................................155 
Measurement of Leakage Current .................................................................................................................................................156 
Ethernet Information ............................................................................................................................................................................156 
Temperature/Date & Time .................................................................................................................................................................158 
Setup Mode .........................................................................................................................................................................................................159 
Full Screen in Setup Mode ................................................................................................................................................................160 
Measurement Setup ..............................................................................................................................................................................161 
Event Setup ...............................................................................................................................................................................................167 
Accura 2350 Module ID Setup ........................................................................................................................................................177 

Contents 
 
Accura 2300/2350 User Guide 
 
Page 12 
ⓒ 2011 Rootech Inc. All Rights Reserved 
 
Accura 2350-1P Device Group Setup...........................................................................................................................................181 
Ethernet Communication Setup ......................................................................................................................................................185 
RS-485 Communication Setup ........................................................................................................................................................188 
Reset Configuration ...............................................................................................................................................................................190 
Digital Input/Output Setup ...............................................................................................................................................................192 
Display Setup ............................................................................................................................................................................................197 
Information ................................................................................................................................................................................................200 
Event Log Mode ................................................................................................................................................................................................202 
Start Event and End Event .................................................................................................................................................................202 
Providing Notifications for Start Events......................................................................................................................................202 
Clearing Event Notifications..............................................................................................................................................................202 
Button Operation ....................................................................................................................................................................................203 
Event Log Number .................................................................................................................................................................................204 
Event Timestamp ....................................................................................................................................................................................204 
Dip Event Log ...........................................................................................................................................................................................205 
Swell Event Log .......................................................................................................................................................................................205 
Fuse Fail Event Log ................................................................................................................................................................................206 
Temperature Event Log .......................................................................................................................................................................207 
Current Event Log ..................................................................................................................................................................................207 
Leakage Current Event Log ...............................................................................................................................................................208 
Demand Current Event Log...............................................................................................................................................................208 
No Event Log ............................................................................................................................................................................................209 
Necessary Steps for Device Setup ...........................................................................................................................................................210 
Step 1: Setup for the Voltage Wiring of Accura 2300 and PT Rating .........................................................................210 
Step 2: Automatic Assignment of Accura 2350 Module IDs and Update of IDs ..................................................211 
Step 3: Accura 2300 Ethernet Setup .............................................................................................................................................214 
Step 3-1 IP, Subnet Mask, and Gateway Setup .......................................................................................................................214 
Chapter 5
 
Measurements ............................................................................................................................................... 215 
General Measurement ....................................................................................................................................................................................215 
Measurement Event .........................................................................................................................................................................................217 
Voltage Wiring ....................................................................................................................................................................................................218 
3-Phase 4-Wire Connection ..............................................................................................................................................................218 
3-Phase 3-Wire Connection ..............................................................................................................................................................219 
1-Phase 3-Wire Connection ..............................................................................................................................................................221 
1-Phase 2-Wire Connection ..............................................................................................................................................................222 
Measurement of Voltage Dips(Sags)/Swells ........................................................................................................................................223 
Leakage Current Measurement ..................................................................................................................................................................224 
Residual Voltage Measurement .................................................................................................................................................................224 
Residual Current Measurement .................................................................................................................................................................224 
Measurement of Power Per Phase ...........................................................................................................................................................225 
Three-phase Power Measurement ...........................................................................................................................................................226 

Accura 2300/2350 User Guide

Contents

Page 13

Power Factor(PF) Measurement .................................................................................................................................................................227

Phase Angle Measurement(Lead/Lag) ....................................................................................................................................................228

Demand Measurement...................................................................................................................................................................................229

Voltage Harmonics ...........................................................................................................................................................................................231

Current Harmonics ...........................................................................................................................................................................................231

Unbalance(NEMA MG1) .................................................................................................................................................................................232

Negative-Sequence/Zero-Sequence Unbalance ................................................................................................................................233

Aggregation .........................................................................................................................................................................................................234

Appendix A

Specifications ............................................................................................................................................. 237

Appendix B

Standards Compliance .............................................................................................................................. 247

IEC 62053-22:2020 Static Meters for AC Active Energy (Classes 0.1S, 0.2S and 0.5S) .......................................250

IEC 62053-24:2020 Static Meters for Fundamental Reactive Energy (Classes 0.5S, 1S, 1, 2 and 3) ............250

Appendix C

Accuracy/Reliability ................................................................................................................................... 251

Accuracy ......................................................................................................................................................................................................251

Reliability .....................................................................................................................................................................................................252

Appendix D

Line-to-neutral Voltage for Common Main Supply Systems .................................................................... 253

Wiring Modes ...........................................................................................................................................................................................253

Appendix E

Ordering Information ................................................................................................................................ 254

Figures

Accura 2300/2350 User Guide

Page 14

Figures

Fig 1.1 Through-hole Type Current Sensing Structure of Accura 2350-3P/1P Module ....................................... 20

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

Fig 1.3 Installation of Accura 2350-3PSC Module ................................................................................................................... 21

Fig 1.4 Installation Example of Accura 2300/2350 Modules .............................................................................................. 26

Fig 1.5 Installation Example of Split-core Power Measuring Modules .......................................................................... 27

Fig 2.1 Accura 2300 Front .................................................................................................................................................................... 35

Fig 2.2 Accura 2300 Side ...................................................................................................................................................................... 35

Fig 2.3 Accura 2300 Rear...................................................................................................................................................................... 35

Fig 2.4 Accura 2350-3P/1P Power Measuring Modules ....................................................................................................... 36

Fig 2.5 Accura 2350-3PSC/1PSC/1PSCSH Split-core Power Measuring Modules ................................................... 36

Fig 2.6 Accura 2300 Components .................................................................................................................................................... 37

Fig 2.7 Accura 2350-3P Components ............................................................................................................................................ 37

Fig 2.8 Accura 2350-1P Components ............................................................................................................................................ 37

Fig 2.9 Accura 2350-1PSH Components ...................................................................................................................................... 38

Fig 2.10 Accura 2350-3PSC Components .................................................................................................................................... 38

Fig 2.11 Accura 2350-1PSC Components .................................................................................................................................... 38

Fig 2.12 Accura 2350-1PSCSH Components .............................................................................................................................. 39

Fig 2.13 TM-3P Components ............................................................................................................................................................. 39

Fig 2.14 TM-1P Components ............................................................................................................................................................. 39

Fig 2.15 Accura 2300 Front Dimensions ....................................................................................................................................... 40

Fig 2.16 Accura 2300 Side Dimensions ......................................................................................................................................... 40

Fig 2.17 Accura 2300 Rear Dimensions ........................................................................................................................................ 40

Fig 2.18 Accura 2350-3P Module Dimensions .......................................................................................................................... 41

Fig 2.19 TM-3P Terminal Block Dimensions ............................................................................................................................... 41

Fig 2.20 Accura 2350-1P Module Dimensions .......................................................................................................................... 42

Fig 2.21 Accura 2350-1PSH Module Dimensions .................................................................................................................... 42

Fig 2.22 TM-1P Terminal Block Dimensions ............................................................................................................................... 43

Fig 2.23 Accura 2350-3PSC Module Dimensions ..................................................................................................................... 44

Fig 2.24 Accura 2350-1PSC Module Dimensions ..................................................................................................................... 45

Fig 2.25 Accura 2350-1PSCSH Module Dimensions ............................................................................................................... 45

Fig 2.26 Installation Diagram of Accura 2300/2350-3P/1P Power Measuring Modules ...................................... 47

Fig 2.27 Installation Diagram of Accura 2300/2350 Split-core Power Measuring Modules .............................. 48

Fig 2.28 Mounting Accura 2300 on the Panel .......................................................................................................................... 49

Fig 2.29 Mounting Accura 2350-3P Power Measuring Module on the Panel .......................................................... 50

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 .......................................... 51 
Fig 2.31 Mounting the Mounting Plate/Terminal Block for Accura 2350-3P on the Panel ............................... 55 
Fig 2.32 Mounting Accura 2350-1P Module on the Panel(Load Located on the Right Side) .......................... 57 
Fig 2.33 Mounting Accura 2350-1P Module on the Panel through Mounting Holes .......................................... 58 
Fig 2.34 Mounting the Mounting Plate/Terminal Block for Accura 2350-1P on the Panel ............................... 62 
Fig 2.35 Mounting Accura 2350-3PSC Module on the Panel (New Installation) .................................................... 64 
Fig 2.36 Mounting Accura 2350-3PSC Module on the Panel through Mounting Holes..................................... 65 
Fig 2.37 Mounting the Mounting Plate for Accura 2350-3PSC Module on the Panel ......................................... 67 
Fig 2.38 Mounting Accura 2350-3PSC Module on the Panel(Installation) ................................................................. 68 
Fig 2.39 Mounting Accura 2350-1PSC Module on the Panel (New Installation) .................................................... 69 
Fig 2.40 Mounting Accura 2350-1PSC Module on the Panel through Mounting Holes..................................... 70 
Fig 2.41 Mounting the Mounting Plate for Accura 2350-1PSC Module on the Panel ......................................... 72 
Fig 2.42 Mounting Accura 2350-1PSC Module in the Existing Panel ........................................................................... 73 
Fig 2.43 Mounting Accura 2350-1PSCSH Module on the Panel (New Installation) .............................................. 74 
Fig 2.44 Mounting Accura 2350-1PSCSH Module on the Panel through Mounting Holes............................... 75 
Fig 2.45 Mounting the Mounting Plate for Accura 2350-1PSCSH Module on the Panel ................................... 76 
Fig 2.46 Mounting Accura 2350-1PSCSH Module on the Panel (Retrofit Installation) ........................................ 77 
Fig 2.47 Voltage Wiring of Accura 2300....................................................................................................................................... 78 
Fig 2.48 3-phase 4-wire, Direct Connection ............................................................................................................................... 80 
Fig 2.49 3-phase 4-wire Connection 3 PTs ................................................................................................................................. 80 
Fig 2.50 3-phase 3-wire, Direct Connection ............................................................................................................................... 81 
Fig 2.51 Three-phase 3-wire Connection with 2 PTs ............................................................................................................. 81 
Fig 2.52 Single-phase 3-wire, Direct Connection ..................................................................................................................... 82 
Fig 2.53 Single-phase 3-wire Connection with 2 PTs ............................................................................................................ 82 
Fig 2.54 Single-phase 2-wire, Direct Connection ..................................................................................................................... 83 
Fig 2.55 Single-phase 2-wire Connection with 1 PT .............................................................................................................. 83 
Fig 2.56 Digital Input/Output Channels on Accura 2300 .................................................................................................... 84 
Fig 2.57 Digital Input .............................................................................................................................................................................. 85 
Fig 2.58 Application of DC Relay ..................................................................................................................................................... 86 
Fig 2.59 Application of AC Relay ...................................................................................................................................................... 86 
Fig 2.60 3P4W/3P3W Through-hole Wiring ............................................................................................................................... 88 
Fig 2.61 3P4W/3P3W Through-hole Wiring with 3 CTs ....................................................................................................... 88 
Fig 2.62 3P3W Through-hole Wiring with 2 CTs ...................................................................................................................... 89 
Fig 2.64 Single-phase Line-to-neutral Through-hole Wiring ............................................................................................. 92 
Fig 2.65 Single-phase Line-to-line Through-hole Wiring .................................................................................................... 92 
Fig 2.66 Grouping Three Accura 2350-1PSCSH Modules in 3P4W/3P3W Mode .................................................... 94 

Figures 
 
Accura 2300/2350 User Guide 
 
Page 16 
ⓒ 2011 Rootech Inc. All Rights Reserved 
 
Fig 2.67 Grouping Two Accura 2350-1PSCSH Modules in 3P3W Mode ..................................................................... 94 
Fig 2.68 Single-phase Line-to-neutral Through-hole Wiring of Single-hole Module ........................................... 95 
Fig 2.69 Single-phase Line-to-line Through-hole Wiring of Single-hole Module .................................................. 95 
Fig 2.70 Connecting the Cable for Connection with the ZCT with the External ZCT ........................................... 96 
Fig 2.71 Connecting Accura 2350 Module with the External ZCT .................................................................................. 97 
Fig 2.72 Example of Connecting Accura 2300 to Accura 2350 for Dedicated Communication ...................... 98 
Fig 2.73 Ethernet Communication Port ㄴ  on Accura 2300 .............................................................................................100 
Fig 2.74 Connecting Accura 2300 Devices via Ethernet Communication .................................................................101 
Fig 2.75 RS-485 Communication Port on Accura 2300 (Option) ...................................................................................102 
Fig 2.76 Connecting Accura 2300 Devices via RS-485 Communication ....................................................................103 
Fig 2.73 Accura 2300 Power Supply Wiring .............................................................................................................................104 
Fig 4.1 Accura 2300 Front View ......................................................................................................................................................145 
Fig 4.2 Screen in Display Mode ......................................................................................................................................................146 
Fig 4.3 Screen in Setup Mode .........................................................................................................................................................146 
Fig 4.4 Screen in Event Log Mode ................................................................................................................................................147 
Fig 4.5 Accura 2300 Front View ......................................................................................................................................................148 
Fig 4.6 Temperature Sensor on Accura 2300 ...........................................................................................................................150 
Fig 4.7 Selecting the ID of Accura 2350 Module ...................................................................................................................150 
Fig 4.8 Voltage/Current/Power/Energy Display Screen .......................................................................................................153 
Fig 4.9 Voltage/Current/Power/Energy Display Screen for Each Phase ......................................................................153 
Fig 4.10 Line-to-line Voltage Display Screen ...........................................................................................................................154 
Fig 4.11 Phase Current Display Screen........................................................................................................................................154 
Fig 4.12 Active Power Display Screen ..........................................................................................................................................155 
Fig 4.13 Active Power Demand Display Screen ......................................................................................................................155 
Fig 4.14 Net Energy Display Screen ..............................................................................................................................................156 
Fig 4.15 Leakage Current Display Screen...................................................................................................................................156 
Fig 4.16 Ethernet Connection Status Display Screen ...........................................................................................................157 
Fig 4.17 Temperature Display Screen ...........................................................................................................................................158 
Fig 4.18 3-phase 4-wire Connection(3P4W): Setup for PT Primary VL12 & Secondary V12 Values ................161 
Fig 4.19 3-phase 3-wire Connection(3P3W): Setup for PT Primary VL12 & Secondary V12 Values ...............162 
Fig 4.20 1-phase 3-wire Connection(1P3W): Setup for PT Primary VL12 & Secondary V13 Values ................162 
Fig 4.21 1-phase 2-wire Connection(1P2W): Setup for PT Primary VL1 & Secondary V1N Values .................162 
Fig 4.22 Dip Event Setup(3-phase 4-wire) .................................................................................................................................168 
Fig 4.23 Dip Event Setup(3-phase 3-wire) .................................................................................................................................168 
Fig 4.24 Swell Event Setup(3-phase 4-wire) .............................................................................................................................170 
Fig 4.25 Swell Event Setup(3-phase 3-wire) .............................................................................................................................170 

Accura 2300/2350 User Guide

Figures

Page 17

Fig 4.26 Dip(Sag) Event Notification Screen.............................................................................................................................202

Fig 4.27 Swell Event Notification Screen ....................................................................................................................................202

Fig 4.28 Example of Event Log Number .....................................................................................................................................204

Fig 5.1 3P4W Connection with 3 PTs and 3 CTs ....................................................................................................................218

Fig 5.2 3P3W Connection with 2 PTs and 3 CTs ....................................................................................................................219

Fig 5.3 1P3W Connection with 2 PTs and 2 CTs ....................................................................................................................221

Fig 5.4 1P2W Connection with 1 PT and 1 CT ........................................................................................................................222

Fig 5.5 Calculation of 1-cycle RMS Voltage Refreshed Each Half Cycle ....................................................................223

Fig 5.6 Voltage Dip(Sag) Detection ...............................................................................................................................................223

Fig 5.7 Vector Sum for the Total Apparent Power ................................................................................................................226

Fig 5.8 Arithmetic Sum for the Total Apparent Power ........................................................................................................227

Fig 5.9 PF Sign and Phase Angle(Lead/Lag) .............................................................................................................................228

Fig 5.10 Demand Calculation ...........................................................................................................................................................229

Fig 5.11 Predicted Demand Calculation .....................................................................................................................................230

Fig 5.12 Hourly Auto Sync .................................................................................................................................................................230

Fig 5.13 Manual Sync ...........................................................................................................................................................................231

Fig 5.14 Symmetrical Components................................................................................................................................................233

Fig 5.15 Aggregation Process ..........................................................................................................................................................234

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 40th

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 61326-1, EN 61326-2-1, EN 61010-1) and UL(UL 61010-1 3rd edition,

IEC 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.

Chapter 1 Introduction

Accura 2300/2350 User Guide

Page 20

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

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.

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ROOTECH Accura 2300/2350 User guide

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