ROOTECH ACCURA 2300S User manual

Distribution Panel Digital Power Meter
Accura 2300S Front
Accura 2300S Rear
Three-phase Power Measuring Module
Single-phase Power Measuring Module
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 Module
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 2300S/2350 User Guide
Notice
ⓒ2013 Rootech Inc. All Rights Reserved
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 the user of the presence of hazards which can result in injury, damage to property
or to the device if proper precautions are not followed.
Note
Indicates installation, operation and maintenance instructions for the product.
Indicates alternative voltage or current.
Indicates direct voltage or current.
Installation Considerations
The installation and operation of Accura 2500/2550 should be performed only by qualified, competent
personnel that have received appropriate training and experience with high voltage and current
modules.
Caution
Failure to observe the following instructions may result in severe injury or death.
◼During normal operation of Accura 2500/2550, hazardous voltages are present on its terminal strips
that connect the PT(Potential Transformer), CT(Current Transformer), voltage input, power, and
external I/O circuits. The secondary of the PT/CT may generate fatal voltages/currents resulting from
the primary of the PT/CT.
◼Standard safety precautions should be followed while installing or maintaining the product, including
removing PT fuses and shorting CT secondaries.
◼Install the product in a switchgear cabinet to prevent users from accessing terminal strips after
completing wiring of the product.

Notice
Accura 2300S/2350 User Guide
Page 6
ⓒ2013 Rootech Inc. All Rights Reserved
Caution
Observe the following instructions, or permanent damage may occur to the product.
◼Do not apply voltages and currents that exceed input ratings of the PT and the CT to the product.
◼Using the device for other purposes not specified by the manufacturer can cause severe damage to
the product.
◼Connect the device’s chassis ground terminal to the earth ground to protect the device from noise
and surge.
About the Manual
Rootech Inc. reserves the right to make changes in the device specifications shown in this User Guide
without notice. Therefore, we recommend that customers should check the latest information on
specifications of the device before making orders.
In the absence of written agreements, Rootech Inc. assumes no liability for assistance with product
applications and the system design created by customers or legal issues, including infringement of
intellectual property arising from the use of modules described herein by third-parties.
We are committed to providing accurate information in this document. However, we assume no
responsibility for any errors in the document and reserves the right to make changes without 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 price paid for the product.

Accura 2300S/2350 User Guide
Warranty
ⓒ2013 Rootech Inc. All Rights Reserved
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 resulting from 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
ⓒ2013 Rootech Inc. All Rights Reserved
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 provided by Rootech's personnel or representatives in system design 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 any product and associated
documentation. The original purchaser should acknowledge that 100% uptime is not guaranteed
because of possible hardware or software defects. The original purchaser should also recognize that such
defects and failures may cause inaccuracies or malfunctions.
Any agency, corporate entity, or individual employees of Rootech or other companies is not authorized
to amend, modify or extend warranty in any way.
Standard Compliance
Process Control Equipment
E324900
MSIP-REM-RTE-ACCURA 2300S

Accura 2300S/2350 User Guide
Revision History
ⓒ2013 Rootech Inc. All Rights Reserved
Page 9
Revision History
The following versions of 「Accura 2300S/2350 User Guide」have been released.
Revision
Date
Description
Revision 1.00
February 14, 2014
Initial draft
Revision 1.10
December 23, 2014
Configuration and measurement description added.
Special-purpose module description
[Accura 2350-GAS/GW/DO/VDC/IDC/TEMP] added.
Revision 1.11
May 21, 2015
Standard compliance updated
Revision 1.12
November 19, 2015
Special-purpose module arrangement modified.
Revision 1.20
December 22, 2016
Typing error corrected, bookmark added, power event added
Revision 1.21
December 3, 2018
Certification image update
Setup and measurement contents update
Zero voltage/current are changed to residual voltage/current.
Description of error according to penetration position for split core
module
Update of Accura 2350 Module Management Screen
Description of the connection number of Accura 2350 special module
Clear description of reading error
Revision 1.22
May 31, 2019
Added detailed description of DO pulse generation related to energy
Revision 1.23
September 25, 2019
Return to Accura 2350 module management policy
Voltage THD: extended to 40th harmonic (voltage 384-sampling/cycle)
Added measurement description for harmonics
Revision 1.24
July 14, 2021
Modified the Max/Min data errors in the General Measurement table
Updated standard compliance
Modified some images about connection as KEC revision

Contents
Accura 2300S/2350 User Guide
Page 10
ⓒ2013 Rootech Inc. All Rights Reserved
Contents
Chapter 1 Introduction ...................................................................................................................................................... 18
Overview.................................................................................................................................................................................................................. 18
Application..............................................................................................................................................................................................................21
Device Lineup........................................................................................................................................................................................................ 22
Distribution Panel Digital Meter/Power Measuring Module ...............................................................................................22
Special-Purpose Module .......................................................................................................................................................................23
Installation Example................................................................................................................................................................................. 24
Features .........................................................................................................................................................................................................26
Chapter 2 Installation......................................................................................................................................................... 31
Environmental Conditions............................................................................................................................................................................... 31
Before you begin.................................................................................................................................................................................................32
Meter Overview .........................................................................................................................................................................................32
Components................................................................................................................................................................................................ 34
Dimension.....................................................................................................................................................................................................36
Installation Diagram ................................................................................................................................................................................43
Step 1: Mounting.................................................................................................................................................................................................45
Accura 2300S Mounting........................................................................................................................................................................ 45
Accura 2350-3P Three-phase Power Measuring Module Mounting............................................................................... 46
Accura 2350-1P Single-phase Power Measuring Module Mounting.............................................................................. 53
Accura 2350-3PSC Split-core Three-phase Power Measuring Module Mounting.................................................... 60
Accura 2350-1PSC Split-core Single-phase Power Measuring Module Mounting...................................................65
Accura 2350-1PSCSH Split-core Single-phase Single-hole Power Measuring Module Mounting...................70
Step 2: Accura 2300S Wiring.........................................................................................................................................................................74
Accura 2300S Voltage Connection...................................................................................................................................................74
Accura 2300S Digital Input/Output Wiring.................................................................................................................................. 79
Step 3: Accura 2350 Current Through-hole Wiring ...........................................................................................................................82
Accura 2350-3P/1P/1PSH Power Measuring Module Through-hole Wiring............................................................... 82
Accura 2350 Single-phase Single-hole Power Measuring Module Through-hole Wiring....................................87
Step 4: Accura 2300S/2350 Combination of Communication ......................................................................................................90
Step 5: Accura 2300S External Communication ................................................................................................................................... 92
Ethernet Communication ......................................................................................................................................................................92
RS-485 Communication......................................................................................................................................................................... 94
Step 6: Accura 2300S Power Supply and Ground Connection.....................................................................................................95
Power Supply Connection ....................................................................................................................................................................95

Accura 2300S/2350 User Guide
Contents
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Page 11
Ground Terminal Connection.............................................................................................................................................................. 95
Chapter 3 Accura 2350 Operation/Setup ....................................................................................................................... 96
Operation Mode........................................................................................................................................................................................96
Button Operation...................................................................................................................................................................................... 96
Accura 2350-3P/3PSC .......................................................................................................................................................................................97
Application Model....................................................................................................................................................................................97
Display Mode..............................................................................................................................................................................................97
Setup Mode................................................................................................................................................................................................. 99
Accura 2350-1P/1PSC .....................................................................................................................................................................................107
Application Model..................................................................................................................................................................................107
Display Mode............................................................................................................................................................................................107
Setup Mode...............................................................................................................................................................................................108
Accura 2350-1PSCSH.......................................................................................................................................................................................117
Application Model..................................................................................................................................................................................117
Display Mode............................................................................................................................................................................................117
Setup Mode...............................................................................................................................................................................................118
Chapter 4 Accura 2300S Operation/Setup ................................................................................................................... 129
Device Configuration.......................................................................................................................................................................................129
Operation Mode......................................................................................................................................................................................129
LED Display ................................................................................................................................................................................................129
Button Operation....................................................................................................................................................................................129
Display Mode ......................................................................................................................................................................................................131
Front Display .............................................................................................................................................................................................131
Accura 2350 Module ID Selection..................................................................................................................................................133
Display Full Screen .................................................................................................................................................................................134
Voltage/Current/Power/Energy.........................................................................................................................................................135
Voltage/Frequency..................................................................................................................................................................................135
Current .........................................................................................................................................................................................................136
Power/Power Factor...............................................................................................................................................................................136
Demand .......................................................................................................................................................................................................137
Active Energy ............................................................................................................................................................................................137
Leakage Current ......................................................................................................................................................................................137
Ethernet Information.............................................................................................................................................................................138
Temperature/Time...................................................................................................................................................................................139
Setup Mode .........................................................................................................................................................................................................140
Setup Full Screen ....................................................................................................................................................................................141

Contents
Accura 2300S/2350 User Guide
Page 12
ⓒ2013 Rootech Inc. All Rights Reserved
Measurement Setup ..............................................................................................................................................................................142
Event Setup................................................................................................................................................................................................147
RS-485 Communication Setup.........................................................................................................................................................157
Ethernet Communication Setup ......................................................................................................................................................159
Reset Setup................................................................................................................................................................................................162
Display Setup............................................................................................................................................................................................163
Accura 2350 Module ID Setup.........................................................................................................................................................166
Accura 2350-1P Group Device Setup ...........................................................................................................................................170
Information ................................................................................................................................................................................................173
Digital Input/Output Setup................................................................................................................................................................174
Event Log Mode ................................................................................................................................................................................................179
Start Event and End Event..................................................................................................................................................................179
Start Event Alarm Generation...........................................................................................................................................................179
Start Event Alarm Clearing.................................................................................................................................................................179
Button Function .......................................................................................................................................................................................180
Event Log Number.................................................................................................................................................................................181
Event Time-stamp...................................................................................................................................................................................181
Dip Event Log ...........................................................................................................................................................................................182
Swell Event Log........................................................................................................................................................................................182
Fuse Fail Event Log ................................................................................................................................................................................183
Temperature Event Log........................................................................................................................................................................183
Current Event Log...................................................................................................................................................................................184
Leakage Current Event Log................................................................................................................................................................184
Demand Current Event Log...............................................................................................................................................................185
No Event Log............................................................................................................................................................................................185
Required Setup Step........................................................................................................................................................................................186
Step 1: Accura 2300S Connection, PT Rating ...........................................................................................................................186
Step 2: Accura 2350 Communication ID Auto-Assignment and Update....................................................................187
Step 3: Accura 2300S Ethernet Setup...........................................................................................................................................190
Chapter 5 Measurement Description............................................................................................................................. 191
General Measurement.....................................................................................................................................................................................191
Measurement Event .........................................................................................................................................................................................193
Measurement for Voltage Connection ...................................................................................................................................................194
3-Phase 4-Wire ........................................................................................................................................................................................194
3-Phase 3-Wire ........................................................................................................................................................................................195
1-Phase 3-Wire ........................................................................................................................................................................................197

Accura 2300S/2350 User Guide
Contents
ⓒ2013 Rootech Inc. All Rights Reserved
Page 13
1-Phase 2-Wire ........................................................................................................................................................................................198
Dip[Sag]/Swell Measurement ......................................................................................................................................................................199
Leakage Current Measurement ..................................................................................................................................................................200
Residual Voltage Measurement..................................................................................................................................................................200
Residual Current Measurement..................................................................................................................................................................200
Phase Power Measurement..........................................................................................................................................................................201
Three-phase Total Power Measurement ................................................................................................................................................202
Power Factor(PF) Measurement..................................................................................................................................................................203
PF Phase Angle Status Measurement......................................................................................................................................................204
Demand Measurement...................................................................................................................................................................................205
Voltage Harmonics ...........................................................................................................................................................................................206
Current Harmonics............................................................................................................................................................................................206
Unbalance(NEMA MG1) .................................................................................................................................................................................207
Sequence Unbalance .......................................................................................................................................................................................208
Aggregation .........................................................................................................................................................................................................209
Appendix A Specification ................................................................................................................................................ 211
Appendix B Standard Compliance ................................................................................................................................. 216
Appendix C Accuracy/Reliability .................................................................................................................................... 217
Accuracy ......................................................................................................................................................................................................217
Reliability.....................................................................................................................................................................................................218
Appendix D Ordering Information................................................................................................................................. 219

Contents
Accura 2300S/2350 User Guide
Page 14
ⓒ2013 Rootech Inc. All Rights Reserved
Figures
Fig 1.1 Accura 2350-3P/1P Through-hole Structure................................................................................................................ 19
Fig 1.2 Accura 2350-3P/1P Compatibility with MCCB/ELB in Dimension..................................................................... 20
Fig 1.3 Accura 2350-3PSC/1PSC Split-core three/single-phase Power Measuring Module Installation........20
Fig 1.4 Power Measuring Module Installation Example.........................................................................................................24
Fig 1.5 Split-core Power Measuring Module Installation Example...................................................................................25
Fig 2.1 Accura 2300S Front.................................................................................................................................................................. 32
Fig 2.2 Accura 2300S Side.................................................................................................................................................................... 32
Fig 2.3 Accura 2300S Rear.................................................................................................................................................................... 32
Fig 2.4 Accura 2350-3P/1P Power Measuring Module ..........................................................................................................33
Fig 2.5 Accura 2350-3PSC/1PSC/1PSCSH Split-core Power Measuring Module.......................................................33
Fig 2.6 Accura 2300S Component.................................................................................................................................................... 34
Fig 2.7 Accura 2350-3P Three-phase Power Measuring Module Component...........................................................34
Fig 2.8 Accura 2350-1P Single-phase Power Measuring Module Component.......................................................... 34
Fig 2.9 Accura 2350-3PSC Split-core Three-phase Power Measuring Module Component................................ 35
Fig 2.10 Accura 2350-1PSC Split-core Single-phase Power Measuring Module Component............................ 35
Fig 2.11 Accura 2350-1PSCSH Split-core Single-phase Single-hole Power Measuring Module Component
..................................................................................................................................................................................................................35
Fig 2.12 TM-3P Three-phase Terminal Component................................................................................................................. 35
Fig 2.13 TM-1P Single-phase Terminal Component................................................................................................................ 35
Fig 2.14 Accura 2300S Front Dimension ....................................................................................................................................... 36
Fig 2.15 Accura 2300S Side Dimension .........................................................................................................................................36
Fig 2.16 Accura 2300S Rear Dimension.........................................................................................................................................36
Fig 2.17 Accura 2350-3P Three-phase Power Measuring Module Dimension........................................................... 37
Fig 2.18 TM-3P Three-phase Terminal Dimension ................................................................................................................... 37
Fig 2.19 Accura 2350-1P Single-phase Power Measuring Module Dimension.......................................................... 38
Fig 2.20 TM-1P Single-phase Terminal Dimension ..................................................................................................................38
Fig 2.21 Accura 2350-1PSH PSH Single-phase Single-hole Power Measuring Module Dimension................ 39
Fig 2.22 Accura 2350-3PSC Split-core Three-phase Power Measuring Module Dimension................................ 39
Fig 2.23 Accura 2350-1PSC Split-core Single-phase Power Measuring Module Dimension...............................40
Fig 2.24 Accura 2350-1PSCSH Split-core Single-phase Single-hole Power Measuring Module Dimension41
Fig 2.25 Accura 2300S/2350-3P/1P Power Measuring Module Installation ................................................................ 43
Fig 2.26 Accura 2300S/2350-3PSC/1PSC/1PSCSH Split-core Power Measuring Module Installation.............44
Fig 2.27 Accura 2300S Mounting......................................................................................................................................................45
Fig 2.28 Accura 2350-3P Power Measuring Module Mounting ........................................................................................46

Accura 2300S/2350 User Guide
Contents
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Page 15
Fig 2.29 Accura 2350-3P Three-Phase Terminal Panel Perforation .................................................................................. 47
Fig 2.30 Accura 2350-3P Mounting Plate / Terminal Panel Perforation........................................................................51
Fig 2.31 Accura 2350-1P Power Measuring Module Mounting ........................................................................................53
Fig 2.32 Accura 2350-1P Single-Phase Terminal Panel Perforation................................................................................. 54
Fig 2.33 Accura 2350-1P Mounting Plate / Terminal Panel Perforation........................................................................58
Fig 2.34 Accura 2350-3PSC Split-core Power Measuring Module New Installation................................................60
Fig 2.35 Accura 2350-3PSC Split-core Three-phase Power Measuring Module Panel Perforation..................61
Fig 2.36 Accura 2350-3PSC Split-core Mounting Plate Panel Perforation....................................................................63
Fig 2.37 Accura 2350-3PSC Split-core Power Measuring Module Remodeling Installation................................ 64
Fig 2.38 Accura 2350-1PSC Split-core Power Measuring Module New Installation................................................65
Fig 2.39 Accura 2350-1PSC Split-core Single-phase Power Measuring Module Panel Perforation.................66
Fig 2.40 Accura 2350-1PSC Split-core Mounting Plate Panel Perforation....................................................................68
Fig 2.41 Accura 2350-1PSC Split-core Power Measuring Module Remodeling Installation................................ 69
Fig 2.42 Accura 2350-1PSCSH Split-core Power Measuring Module New Installation.......................................... 70
Fig 2.43 Accura 2350-1PSCSH Split-core Power Measuring Module Panel Perforation........................................71
Fig 2.44 Accura 2350-1PSCSH Split-core Mounting Plate Panel Perforation..............................................................72
Fig 2.45 Accura 2350-1PSCSH Split-core Power Measuring Module Remodeling Installation..........................73
Fig 2.46 Accura 2300S Voltage Connection ................................................................................................................................74
Fig 2.47 3-phase 4-wire, Direct Connection................................................................................................................................75
Fig 2.48 3-phase 4-wire, 3PT Connection..................................................................................................................................... 75
Fig 2.49 3-phase 3-wire, Direct Connection................................................................................................................................76
Fig 2.50 Three-phase 3-wire, 2PT Connection ...........................................................................................................................76
Fig 2.51 Single-phase 3-wire, Direct Connection...................................................................................................................... 77
Fig 2.52 Single-phase 3-wire, 2PT Connection .......................................................................................................................... 77
Fig 2.53 Single-phase 2-wire, Direct Connection...................................................................................................................... 78
Fig 2.54 Single-phase 2-wire, 1PT Connection .......................................................................................................................... 78
Fig 2.55 Accura 2300S Digital Input/Output Channel ............................................................................................................79
Fig 2.56 Digital Input .............................................................................................................................................................................. 79
Fig 2.57 DC Relay application............................................................................................................................................................. 81
Fig 2.58 AC Relay application .............................................................................................................................................................81
Fig 2.59 Three-phase 4-wire/3-wire, Direct Through-hole Wiring ...................................................................................84
Fig 2.60 Three-phase 4-wire/3-wire, 3CT Through-hole Wiring........................................................................................84
Fig 2.61 Three-phase 3-wire, 2CT Through-hole Wiring....................................................................................................... 85
Fig 2.62 Single-phase LN[Line-to-neutral] Through-hole Wiring .....................................................................................86
Fig 2.63 Single-phase LL[Line-to-line] Through-hole Wiring.............................................................................................. 86
Fig 2.64 Three-Module Group Device for 3P4W/3P3W connection ...............................................................................88

Contents
Accura 2300S/2350 User Guide
Page 16
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Fig 2.65 Two-Module Group Device for 3P3W connection................................................................................................. 88
Fig 2.66 Single-phase LN[Line-to-neutral] Single-hole Module Through-hole Wiring.......................................... 89
Fig 2.67 Single-phase LL[Line-to-line] Single-hole Module Through-hole Wiring .................................................. 89
Fig 2.68 Accura 2300S/2350 Combination Example of Communication.......................................................................90
Fig 2.69 Accura 2300S Ethernet communication port ...........................................................................................................92
Fig 2.70 Accura 2300S Ethernet Connection............................................................................................................................... 93
Fig 2.71 Accura 2300S RS-485 Communication........................................................................................................................94
Fig 2.72 Accura 2300S RS-485 Communication connection...............................................................................................94
Fig 2.73 Accura 2300S Power Supply .............................................................................................................................................95
Fig 4.1 Accura 2300S Front configuration..................................................................................................................................129
Fig 4.2 Screen of Display Mode.......................................................................................................................................................130
Fig 4.3 Screen of Setup Mode..........................................................................................................................................................130
Fig 4.4 Screen of Event Log Mode.................................................................................................................................................130
Fig 4.5 Accura 2300S Front View ....................................................................................................................................................131
Fig 4.6 Accura 2300S Temperature Sensor.................................................................................................................................132
Fig 4.7 Accura 2350 Module ID Selection at upper part of LCD Screen ....................................................................133
Fig 4.8 Voltage/Current/Power/Energy Display Screen ........................................................................................................135
Fig 4.9 Voltage/Current/Power/Energy Display Screen for each phase.......................................................................135
Fig 4.10 Line-to-line Voltage Display Screen ............................................................................................................................136
Fig 4.11 Current Display Screen ......................................................................................................................................................136
Fig 4.12 Active Power Display Screen...........................................................................................................................................136
Fig 4.13 Demand Active Power Display Screen .......................................................................................................................137
Fig 4.14 Net Energy Display Screen ..............................................................................................................................................137
Fig 4.15 Leakage Current Display Screen ...................................................................................................................................138
Fig 4.16 Ethernet Connection Status Display Screen ............................................................................................................138
Fig 4.17 Temperature Display Screen............................................................................................................................................139
Fig 4.18 3-phase 4-wire connection[3P4W]: PT Primary VAB , Secondary V12 ..........................................................142
Fig 4.19 3-phase 3-wire connection[3P3W]: PT Primary VAB , Secondary V12 ..........................................................143
Fig 4.20 1-phase 3-wire connection[1P3W]: PT Primary VL12 , Secondary V13 .........................................................143
Fig 4.21 1-phase 2-wire connection[1P2W]: PT Primary VL12 , Secondary V1N.........................................................143
Fig 4.22 Dip Event Setup[3-phase 4-wire]..................................................................................................................................148
Fig 4.23 Dip Event Setup[3-phase 3-wire]..................................................................................................................................148
Fig 4.24 Swell Event Setup[3-phase 4-wire] ..............................................................................................................................150
Fig 4.25 Swell Event Setup[3-phase 3-wire] ..............................................................................................................................150
Fig 4.26 Dip[Sag] Event Alarm Display.........................................................................................................................................179
Fig 4.27 Swell Event Alarm Display................................................................................................................................................179

Accura 2300S/2350 User Guide
Contents
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Page 17
Fig 4.28 Event Log Number Example ...........................................................................................................................................181
Fig 5.1 3PT 3CT Wiring, 3P4W Connection ...............................................................................................................................194
Fig 5.2 2PT 3CT Wiring, 3P3W Connection ...............................................................................................................................195
Fig 5.3 2PT 2CT Wiring, 1P3W Connection ...............................................................................................................................197
Fig 5.4 1PT 1CT Wiring, 1P2W Connection ...............................................................................................................................198
Fig 5.5 Half-cycle Refreshed 1-cycle RMS Calculation .........................................................................................................199
Fig 5.6 Voltage Dip[Sag] Detection................................................................................................................................................199
Fig 5.7 Vector Sum for Total Apparent Power ..........................................................................................................................202
Fig 5.8 Arithmetic Sum for Total Apparent Power..................................................................................................................203
Fig 5.9 Power Sign and PF Phase Angle Status.......................................................................................................................204
Fig 5.10 Demand Calculation............................................................................................................................................................205
Fig 5.11 Prediction Demand Calculation.....................................................................................................................................205
Fig 5.12 Voltage FFT Data Processing (~MCU F/W 3.50) ...................................................................................................206
Fig 5.13 Voltage FFT Data Processing (MCU F/W 3.51~) ...................................................................................................206
Fig 5.14 Current FFT Data Processing ..........................................................................................................................................207
Fig 5.15 Symmetrical Components ................................................................................................................................................208
Fig 5.16 Aggregation Process...........................................................................................................................................................209

Chapter 1 Introduction
Accura 2300S/2350 User Guide
Page 18
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Chapter 1 Introduction
Overview
Energy Management Paradigm Shift from Main Load to Branch Load
In the energy low-cost era, total energy management centered on switchgear panels such as main
feeder (from feeder to ABS) for stable power supply played an important role. However, there is an
increasing demand to manage the branch load electrical energy in manufacturing plants, IDC centers,
and the distribution boards of buildings when the energy costs rise sharply and the CO2 emission
reduction policy is implemented in 2015.
Limit of Application of the existing Digital Power Meter to Distribution Panel
To apply the digital power meter which is long used in the existing switchgear panel to distribution
panel has had the limit caused by narrow space, hazardous wiring of voltage and current, and high
installation cost. This fundamentally makes it difficult for energy management supervisor to access to the
energy information of branch loads in distribution panel.
Distribution Panel Digital Power Meter only for Branch Load Management
Distribution panel digital power meter comprises both Accura 2300S[digital power meter] which is
mounted on front of distribution panel, and Accura 2350[power measuring module] which is mounted in
branch loads inside the panel. Accura 2300S collects power data from several Accura 2350s on RS-485
communication and displays measurements of only one Accura 2350 selected on its LCD screen. This
provides energy management supervisor with the power quality information of branch loads which was
impossible to identify.
Voltage ±0.2% Reading/Current ±0.2%[±0.5% 1] Reading/IEC62053-22 Class 0.5S[Class 0.2S 2]
Accuracy
Recently enterprise energy management system is essential for effective energy use and preventive
management to prepare CO2 emission management in plant, data center and building. The key factor to
determine reliability of the energy management is measurement accuracy. Accura 2300S/2350 supports
±0.2% reading error for voltage, ±0.2%[±0.5% 1] reading error for current, and conforms to IEC62053-22
class 0.5S[Class 0.2S 2] for power and energy. This makes it possible to precisely analyze and diagnose
energy management and various problems with power facilities.
1. Split-core three/single-phase power measuring modules support ±0.5% reading error for current. And these split-
core modules can increase the maximum ±1% reading error depending on the penetration position of power cable.
2. Split-core single-phase single-hole power measuring module meets current accuracy ±0.2% reading error and
power/energy accuracy IEC62053-22 Class 0.2S.

Accura 2300S/2350 User Guide
Chapter 1 Introduction
ⓒ2013 Rootech Inc. All Rights Reserved
Page 19
Dip[Sag]/Swell[IEC61000-4-30], Power Quality
Accura 2300S provides a variety of power quality information, including dip[sag], swell and harmonic
information[up to 40th], crest factor, K-factor, and unbalance ratio. This enables the energy manager to
easily identify power quality changes in various power distribution systems in the power plant, thus
realistic power quality management is possible. Power quality information conforms to IEC61000-4-30.
Maximum/minimum/average statistical information in aggregation interval
Accura 2300S calculates the average value for every 0.5-second interval from the cycle-unit
measurement. The maximum/minimum/average values are calculated and provided for the intervals of 1-
second, 5-second, 1-minute, 5-minute, 1-hour, and 6-hour from the average value of 0.5-second intervals.
Here, a measurement interval longer than 0.5-second is referred to as an aggregation interval.
Accura 2300S is capable of measuring the maximum, minimum, and average statistical information for
each aggregation interval and time information about the maximum/minimum occurrence time[time-
stamp]. This includes information of measurement parameters that fluctuate instantaneously with respect
to the aggregation interval, thus enabling accurate trend analysis of voltage, current, and power quality.
Proven Safety and Reliability with CE/UL/KC
The structure-framework, circuit, and fire of Accura 2300/2350 conforms to standard CE[EN61326-1,
EN61326-2-1], UL[UL61010-1], and KC[KN22, KN24].
Safety Guarantee of Installation by Through-hole Structure
Accura 2350-3P/1P three/single-phase power measuring module is structured with through-hole current
sensing without any electrical contact, which guarantees safety of electrical accident and simplifies
installation. TM-3P/1P is three/single-phase terminal for helping wiring.
Fig 1.1 Accura 2350-3P/1P Through-hole Structure

Chapter 1 Introduction
Accura 2300S/2350 User Guide
Page 20
ⓒ2013 Rootech Inc. All Rights Reserved
Integrated Installation with Various rated MCCB/ELB
The installation of Accura 2350-3P/1P three-[single]-phase power measuring module is compatible with
various rated MCCB/ELB in dimension.
Fig 1.2 Accura 2350-3P/1P Compatibility with MCCB/ELB in Dimension
Live-line Installation by Split-core Structure [applied only to split-core power measuring module]
Accura 2350-3PSC/1PSC/1PSCSH split-core three/single-phase power measuring module makes it
possible to install without power interruption by split-core structure.
Fig 1.3 Accura 2350-3PSC/1PSC Split-core three/single-phase Power Measuring Module Installation