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Digital Power Meter
Accura 2300S front
Accura 2300S rear
Three-Phase Power Measuring Module / Terminal Block
Single-Phase Power Measuring Module / Terminal Block
Accura 2350-3P-250A-105
TM-3P-105
Accura 2350-1P-250A-105
TM-1P-105
Accura 2350-3P-125A-90
TM-3P-90
Accura 2350-1P-125A-60
TM-1P-60
Accura 2350-3P-100A-75
TM-3P-75L
Accura 2350-1P-100A-50
TM-1P-50L
Accura 2350-3P-60A-75
TM-3P-75
Accura 2350-1P-60A-50
TM-1P-50
Accura 2350-3P-CT5A-75
Accura 2350-1P-50A-35
Accura 2350-1P-30A-35
Accura 2350-1PSH-50A-35
Accura 2350-1PSH-30A-35
Three-Phase Split-Core
Power Measuring Module
Single-Phase Split-Core
Power Measuring Module
Single-Phase Split-Core Single-Hole
Power Measuring Module
Accura 2350-3PSC-250A-105
Accura 2350-1PSC-250A-105
Accura 2350-1PSCSH-800A
Accura 2350-3PSC-125A-90
Accura 2350-1PSC-125A-60
Accura 2350-1PSCSH-630A
Accura 2350-3PSC-60A-75
Accura 2350-1PSC-60A-50
Accura 2350-1PSCSH-400A
Accura 2350-3PSC-CT5A-90
Special-Purpose Module
Accura 2350-GAS
Accura 2350-GW
Accura 2350-TEMP
Accura TSEN/THSEN
Accura 2350-TEMPS
Accura 2350-DO
Accura 2350-IDC
Accura 2350-VDC
Accura 2350-DCM-50V-80A
Accura 2350-DCM-500V-80A
Accura 2300S/2350 User Guide
Notice
â“’ 2011 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 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.
â—¼ 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.
â—¼ Before carrying out any work on the device, switch off the power supply to the device.
â—¼ Always use an appropriate voltage detection device to confirm the absence of voltage.
â—¼ Always power the device with the correct rated voltage.
â—¼ Install the device in a suitable electrical cabinet by following recommended installation instructions.
Failure to take these precautions could cause serious injuries or death.
Notice
Accura 2300S/2350 User Guide
Page 6
â“’ 2011 Rootech Inc. All Rights Reserved
Caution
Observe the following instructions, or it may cause permanent damage to the product.
To ensure that the device operates correctly, make sure that:
â—¼ The device is correctly installed.
◼ The power supply voltage indicated on the product is observed: AC 100 – 240 V, DC 100 – 300 V.
About the Manual
Rootech Inc. reserves the right to make changes in the product specifications shown in this User Guide
without prior notice. We recommend that customers should obtain the latest information on product
specifications and the manual before making orders.
In the absence of written agreements, Rootech Inc. assumes no liability for applications assistance,
customer’s system design, or infringement of patents or copyrights induced by third parties arising from
the use of the products described herein.
We endeavor to provide accurate information in the document. However, we are not responsible for any
errors which may appear here and reserves the right to make changes without prior notice.
Limitation of Liability
Where applicable law allows and does not prohibit or restrict such limitation, Rootech Inc’s liability for
this product shall be limited to the amount actually paid by customers for the product.
Accura 2300S/2350 User Guide
Warranty
â“’ 2011 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.
â—¼ Improper use (alteration, accident, misuse, abuse) or failure to act in accordance with installation,
operation or maintenance instructions
â—¼ Unauthorized modifications, changes or repair attempts
â—¼ Failure to comply with applicable safety standards & regulations
â—¼ Damages coming from when transporting or storing the product
â—¼ Damages caused by the force majeure event, including fire, flood, earthquakes, storm damage,
overvoltage & lightning
â—¼ If the original identification marks (trade-mark, serial number, etc.) have been defaced, altered, or
removed.
Warranty
Accura 2300S/2350 User Guide
Page 8
â“’ 2011 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 with system design provided by Rootech's personnel or representatives shall be
deemed to be a suggestion. The original purchaser is responsible for determining the feasibility of such
suggestions and should conduct tests to prove their feasibility.
It is the original purchaser’s responsibility to determine the suitability of the product and associated
documentation. The original purchaser should acknowledge that 100% up time is not realizable because
of possible hardware or software defects. The original purchaser should recognize that such defects and
failures may cause inaccuracies or malfunctions.
No agency, corporate entity, or employee of Rootech or other companies has authority to amend, modify
or extend the terms and conditions of this warranty in any way without express written authorization
from Rootech Inc.
Standards Compliance
Process Control Equipment
E324900
R-R-RTE-ACCURA2300S
Energy-usage Monitor
E522977
Accura 2300S/2350 User Guide
Revision History
â“’ 2011 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 2.00
February 16, 2022
Release of the User Guide for the device with the HW revision number
higher than 200.00
Changed voltage sampling information to 512 samples/cycle
Added contents on the 1P2F measurement of the 3P power measuring
module
Added contents on the demand sync mode
Added contents on connection between external ZCTs and Accura 2350
modules
Added contents on the power event log
Revision 2.01
September 27, 2022
Changed some of the terms used in the document to achieve
consistency
Revision 2.10
September 18, 2023
Changed the harmonic order range needed to calculate voltage THD up
to the 50th order
Changed the description of data aggregation
Changed specifications for power supply and voltage measurements
Added information on the renewed UL certification
Corrected errors in wiring diagrams
Revision 2.20
November 22, 2023
Added information on Accura THSEN connected to Accura 2350-TEMP
Contents
Accura 2300S/2350 User Guide
Page 10
â“’ 2011 Rootech Inc. All Rights Reserved
Contents
Chapter 1
Introduction ..................................................................................................................................................... 18
Overview .................................................................................................................................................................................................................. 18
Applications ........................................................................................................................................................................................................... 21
Product Information .......................................................................................................................................................................................... 22
Digital Meter/Power Measuring Module ...................................................................................................................................... 22
Special-Purpose Modules ..................................................................................................................................................................... 24
Installation Example ................................................................................................................................................................................ 25
Product Features ....................................................................................................................................................................................... 27
Chapter 2
Installation ....................................................................................................................................................... 32
Installation Conditions ...................................................................................................................................................................................... 32
Before Installation ............................................................................................................................................................................................... 33
Product Appearance ............................................................................................................................................................................... 33
Components ................................................................................................................................................................................................ 35
Dimensions .................................................................................................................................................................................................. 38
Installation Example ................................................................................................................................................................................ 45
Step 1: Installing the Product ....................................................................................................................................................................... 47
Mounting Accura 2300S on the Panel .......................................................................................................................................... 47
Mounting Accura 2350-3P Power Measuring Modules on the Panel ........................................................................... 48
Mounting Accura 2350-1P Power Measuring Module on the Panel ............................................................................. 55
Mounting Accura 2350-3PSC Power Measuring Module on the Panel ....................................................................... 62
Mounting Accura 2350-1PSC Power Measuring Module on the Panel ....................................................................... 67
Mounting Accura 2350-1PSCSH Power Measuring Module on the Panel ................................................................. 72
Step 2: Wiring Accura 2300S ........................................................................................................................................................................ 76
Voltage Wiring of Accura 2300S ...................................................................................................................................................... 76
Digital Input / Output Wiring of Accura 2300S........................................................................................................................ 82
Step 3: Through-Hole Current Wiring of Accura 2350 .................................................................................................................... 85
Through-Hole Wiring of Accura 2350-3P/3PSC Modules ................................................................................................... 85
Through-Hole Wiring of Accura 2350-1P/1PSH/1PSC Modules ...................................................................................... 89
Through-Hole Wiring of Accura 2350-1PSCSH Modules .................................................................................................... 91
Step 4: Connecting Accura 2350 with External ZCTs ........................................................................................................................ 94
Step 5: Connecting Accura 2300S with Accura 2350 ....................................................................................................................... 95
Step 6: Connecting Accura 2300S Devices for External Communication ............................................................................... 97
Ethernet Communication ...................................................................................................................................................................... 97
RS-485 Communication ........................................................................................................................................................................ 99
Step 7: Accura 2300S Power Supply and Ground Wiring ............................................................................................................100
Power Supply Wiring ............................................................................................................................................................................100
Ground Wiring .........................................................................................................................................................................................100
Accura 2300S/2350 User Guide
Contents
â“’ 2011 Rootech Inc. All Rights Reserved
Page 11
Chapter 3
Accura 2350 Operation/Setup .................................................................................................................... 101
Operation Mode .....................................................................................................................................................................................101
Button Operation ....................................................................................................................................................................................101
Accura 2350-3P/3PSC .....................................................................................................................................................................................102
Applied Model .........................................................................................................................................................................................102
Front View ..................................................................................................................................................................................................102
Display Mode ...........................................................................................................................................................................................103
Setup Mode...............................................................................................................................................................................................105
Accura 2350-1P/1PSC .....................................................................................................................................................................................119
Applied Model .........................................................................................................................................................................................119
Front View ..................................................................................................................................................................................................119
Display Mode ...........................................................................................................................................................................................120
Setup Mode...............................................................................................................................................................................................120
Accura 2350-1PSCSH ......................................................................................................................................................................................129
Applied Model .........................................................................................................................................................................................129
Front View ..................................................................................................................................................................................................129
Display Mode ...........................................................................................................................................................................................130
Setup Mode...............................................................................................................................................................................................130
Chapter 4
Accura 2300S Operation/Setup ................................................................................................................. 141
Device Configuration ......................................................................................................................................................................................141
Operation Modes ...................................................................................................................................................................................141
LED Display ................................................................................................................................................................................................141
Button Operation ....................................................................................................................................................................................142
Display Mode ......................................................................................................................................................................................................144
Front View ..................................................................................................................................................................................................144
Selecting the ID of Accura 2350 Module...................................................................................................................................146
Full Display Screen .................................................................................................................................................................................148
Measurement of Voltage/Current/Power/Energy ...................................................................................................................149
Measurement of Voltage/Frequency ............................................................................................................................................150
Measurement of Current ....................................................................................................................................................................150
Measurement of Power/Power Factor ..........................................................................................................................................151
Measurement of Demand ..................................................................................................................................................................151
Measurement of Active Energy .......................................................................................................................................................152
Measurement of Leakage Current .................................................................................................................................................152
Ethernet Information ............................................................................................................................................................................153
Temperature/Date & Time .................................................................................................................................................................154
Setup Mode .........................................................................................................................................................................................................155
Full Screen in Setup Mode ................................................................................................................................................................156
Measurement Setup ..............................................................................................................................................................................157
Event Setup ...............................................................................................................................................................................................163
Accura 2350 Module ID Setup ........................................................................................................................................................173
Contents
Accura 2300S/2350 User Guide
Page 12
â“’ 2011 Rootech Inc. All Rights Reserved
Accura 2350-1P Device Group Setup...........................................................................................................................................177
Ethernet Communication Setup ......................................................................................................................................................180
RS-485 Communication Setup ........................................................................................................................................................183
Reset Configuration ...............................................................................................................................................................................185
Digital Input/Output Setup ...............................................................................................................................................................187
Display Setup ............................................................................................................................................................................................192
Information ................................................................................................................................................................................................195
Event Mode ..........................................................................................................................................................................................................196
Start Event and End Event .................................................................................................................................................................196
Providing Notifications for Start Events......................................................................................................................................196
Clearing Event Notifications..............................................................................................................................................................196
Button Function .......................................................................................................................................................................................197
Event Log Number .................................................................................................................................................................................198
Event Timestamp ....................................................................................................................................................................................198
Dip Event Log ...........................................................................................................................................................................................199
Swell Event Log .......................................................................................................................................................................................199
Fuse Fail Event Log ................................................................................................................................................................................200
Temperature Event Log .......................................................................................................................................................................201
Current Event Log ..................................................................................................................................................................................201
Leakage Current Event Log ...............................................................................................................................................................202
Demand Current Event Log...............................................................................................................................................................203
Power Event Log .....................................................................................................................................................................................204
No Event Log ............................................................................................................................................................................................204
Necessary Steps for Device Setup ...........................................................................................................................................................205
Step 1: Setup for the Voltage Wiring of Accura 2300S and PT Rating ......................................................................205
Step 2: Automatic Assignment of Accura 2350 Module IDs and Update of IDs ..................................................206
Step 3: Ethernet Setup of Accura 2300S ....................................................................................................................................209
Chapter 5
Measurements ............................................................................................................................................... 210
General Measurement ....................................................................................................................................................................................210
Measurement Event .........................................................................................................................................................................................212
Voltage Wiring ....................................................................................................................................................................................................213
3-Phase 4-Wire Connection ..............................................................................................................................................................213
3-Phase 3-Wire Connection ..............................................................................................................................................................214
1-Phase 3-Wire Connection ..............................................................................................................................................................216
1-Phase 2-Wire Connection ..............................................................................................................................................................217
Measurement of Voltage Dips(Sags)/Swells ........................................................................................................................................218
Leakage Current Measurement ..................................................................................................................................................................219
Residual Voltage Measurement .................................................................................................................................................................219
Residual Current Measurement .................................................................................................................................................................219
Measurement of Power Per Phase ...........................................................................................................................................................220
Three-Phase Power Measurement ............................................................................................................................................................221
Accura 2300S/2350 User Guide
Contents
â“’ 2011 Rootech Inc. All Rights Reserved
Page 13
Power Factor(PF) Measurement .................................................................................................................................................................222
Phase Angle Measurement(Lead/Lag) ....................................................................................................................................................223
Demand Measurement...................................................................................................................................................................................224
Voltage Harmonics ...........................................................................................................................................................................................226
Current Harmonics ...........................................................................................................................................................................................226
Unbalance(NEMA MG1) .................................................................................................................................................................................226
Negative-Sequence/Zero-Sequence Unbalance ................................................................................................................................228
Aggregation .........................................................................................................................................................................................................229
Appendix A
Specifications ............................................................................................................................................. 232
Appendix B
Standards Compliance .............................................................................................................................. 242
IEC 61557-12:2018
Performance Measuring and Monitoring Devices(PMD) ........................................................243
IEC 62053-22:2020 Static Meters for AC Active Energy (Classes 0.1S, 0.2S and 0.5S) .......................................245
IEC 62053-24:2020 Static Meters for Fundamental Reactive Energy (Classes 0.5S, 1S, 1, 2 and 3) ............245
Appendix C
Accuracy/Reliability ................................................................................................................................... 246
Accuracy ......................................................................................................................................................................................................246
Reliability .....................................................................................................................................................................................................247
Appendix D
Line-to-Neutral Voltage for Common Main Supply Systems ................................................................... 248
Wiring Modes ...........................................................................................................................................................................................248
Appendix E
Ordering Information ................................................................................................................................ 249
Figures
Accura 2300S/2350 User Guide
Page 14
â“’ 2011 Rootech Inc. All Rights Reserved
Figures
Fig 1.1 Through-Hole Type Current Sensing Structure of Accura 2350-3P/1P Module ...................................... 19
Fig 1.2 Accura 2350 Module Compatible with MCCBs/ELBs with Various Ratings ................................................ 20
Fig 1.3 Installation of Accura 2350-3PSC/1PSC Module ...................................................................................................... 20
Fig 1.4 Installation Example of Accura 2300S/2350 Modules ........................................................................................... 25
Fig 1.5 Installation Example of Split-Core Power Measuring Module ........................................................................... 26
Fig 2.1 Accura 2300S Front ................................................................................................................................................................. 33
Fig 2.2 Accura 2300S Side ................................................................................................................................................................... 33
Fig 2.3 Accura 2300S Rear ................................................................................................................................................................... 33
Fig 2.4 Accura 2350-3P/1P Power Measuring Modules ....................................................................................................... 34
Fig 2.5 Accura 2350-3PSC/1PSC/1PSCSH Split-core Power Measuring Modules ................................................... 34
Fig 2.6 Accura 2300S Components ................................................................................................................................................. 35
Fig 2.7 Accura 2350-3P Components ............................................................................................................................................ 35
Fig 2.8 Accura 2350-1P Components ............................................................................................................................................ 35
Fig 2.9 Accura 2350-1PSH Components ...................................................................................................................................... 36
Fig 2.10 Accura 2350-3PSC Components .................................................................................................................................... 36
Fig 2.11 Accura 2350-1PSC Components .................................................................................................................................... 36
Fig 2.12 Accura 2350-1PSCSH Components .............................................................................................................................. 37
Fig 2.13 TM-3P Components ............................................................................................................................................................. 37
Fig 2.14 TM-1P Components ............................................................................................................................................................. 37
Fig 2.15 Accura 2300S Front Dimensions .................................................................................................................................... 38
Fig 2.16 Accura 2300S Side Dimensions ...................................................................................................................................... 38
Fig 2.17 Accura 2300S Rear Dimensions ...................................................................................................................................... 38
Fig 2.18 Accura 2350-3P Module Dimensions .......................................................................................................................... 39
Fig 2.19 TM-3P Terminal Block Dimensions ............................................................................................................................... 39
Fig 2.20 Accura 2350-1P Module Dimensions .......................................................................................................................... 40
Fig 2.22 Accura 2350-1PSH Module Dimensions .................................................................................................................... 40
Fig 2.21 TM-1P Single-phase Terminal Block Dimensions .................................................................................................. 41
Fig 2.23 Accura 2350-3PSC Module Dimensions ..................................................................................................................... 42
Fig 2.24 Accura 2350-1PSC Module Dimensions ..................................................................................................................... 43
Fig 2.25 Accura 2350-1PSCSH Module Dimensions ............................................................................................................... 43
Fig 2.26 Installation Diagram of Accura 2300S/2350-3P/1P Power Measuring Modules ................................... 45
Fig 2.27 Installation Diagram of Accura 2300S/2350 Split-core Power Measuring Modules ............................ 46
Fig 2.28 Mounting Accura 2300S on the Panel ........................................................................................................................ 47
Fig 2.29 Mounting Accura 2350-3P Module on the Panel ................................................................................................. 48
Accura 2300S/2350 User Guide
Figures
â“’ 2011 Rootech Inc. All Rights Reserved
Page 15
Fig 2.30 Mounting Accura 2350-3P Module on the Panel through Mounting Holes .......................................... 49
Fig 2.31 Mounting the Mounting Plate / Terminal Block for Accura 2350-3P on the Panel ............................ 53
Fig 2.32 Mounting Accura 2350-1P Module on the Panel(Load Located on the Right Side) .......................... 55
Fig 2.33 Mounting Accura 2350-1P Module on the Panel through Mounting Holes .......................................... 56
Fig 2.34 Mounting the Mounting Plate / Terminal Block for Accura 2350-1P on the Panel ............................ 60
Fig 2.35 Mounting Accura 2350-3PSC Module on the Panel (New Installation) .................................................... 62
Fig 2.36 Mounting Accura 2350-3PSC Module on the Panel through Mounting Holes..................................... 63
Fig 2.37 Mounting the Mounting Plate for Accura 2350-3PSC Module on the Panel ......................................... 65
Fig 2.38 Mounting Accura 2350-3PSC Module on the Panel (Retrofit Installation)............................................... 66
Fig 2.39 Mounting Accura 2350-1PSC Module on the Panel (New Installation) .................................................... 67
Fig 2.40 Mounting Accura 2350-1PSC Module on the Panel through Mounting Holes..................................... 68
Fig 2.41 Mounting the Mounting Plate for Accura 2350-1PSC Module on the Panel ......................................... 70
Fig 2.42 Mounting Accura 2350-1PSC Module on the Panel (Retrofit Installation)............................................... 71
Fig 2.43 Mounting Accura 2350-1PSCSH Module on the Panel (New Installation) .............................................. 72
Fig 2.44 Mounting Accura 2350-1PSCSH Module on the Panel through Mounting Holes............................... 73
Fig 2.45 Mounting the Mounting Plate for Accura 2350-1PSCSH Module on the Panel ................................... 74
Fig 2.46 Mounting Accura 2350-1PSCSH Module on the Panel (Retrofit Installation) ........................................ 75
Fig 2.47 Voltage Wiring of Accura 2300S .................................................................................................................................... 76
Fig 2.48 3-Phase 4-Wire, Direct Connection .............................................................................................................................. 78
Fig 2.49 3-Phase 4-Wire Connection with 3 PTs ...................................................................................................................... 78
Fig 2.50 3-Phase 3-Wire, Direct Connection .............................................................................................................................. 79
Fig 2.51 3-Phase 3-Wire Connection with 2 PTs ...................................................................................................................... 79
Fig 2.52 1-Phase 3-Wire, Direct Connection .............................................................................................................................. 80
Fig 2.53 1-Phase 3-Wire Connection with 2 PTs ...................................................................................................................... 80
Fig 2.54 1-Phase 2-Wire, Direct Connection .............................................................................................................................. 81
Fig 2.55 1-Phase 2-Wire Connection with 1 PT ........................................................................................................................ 81
Fig 2.56 Digital Input / Output Channels on Accura 2300S .............................................................................................. 82
Fig 2.57 Digital Inputs ............................................................................................................................................................................ 82
Fig 2.58 Application of DC Relay ..................................................................................................................................................... 84
Fig 2.59 Application of AC Relay ...................................................................................................................................................... 84
Fig 2.60 3P4W/3P3W Through-Hole Wiring............................................................................................................................... 86
Fig 2.61 3P4W/3P3W Through-Hole Wiring with 3 CTs ....................................................................................................... 86
Fig 2.62 3P3W Through-Hole Wiring with 2 CTs ..................................................................................................................... 87
Fig 2.64 Single-Phase Line-to-Neutral Through-Hole Wiring ........................................................................................... 90
Fig 2.65 Single-Phase Line-to-Line Through-Hole Wiring .................................................................................................. 90
Fig 2.66 Grouping Three Accura 2350-1PSCSH Modules in 3P4W/3P3W Mode .................................................... 92
Figures
Accura 2300S/2350 User Guide
Page 16
â“’ 2011 Rootech Inc. All Rights Reserved
Fig 2.67 Grouping Two Accura 2350-1PSCSH Modules in 3P3W Mode ..................................................................... 92
Fig 2.68 Single-Phase Line-to-Neutral Through-Hole Wiring of Single-Hole Module ......................................... 93
Fig 2.69 Single-Phase Line-to-Line Through-Hole Wiring of Single-Hole Module ................................................ 93
Fig 2.70 Connecting the Cable for Connection with the ZCT to the External ZCT ................................................ 94
Fig 2.71 Connecting Accura 2350 Module to the External ZCT ....................................................................................... 94
Fig 2.72 Example of Connecting Accura 2300S to Accura 2350 for Dedicated Communication ................... 95
Fig 2.73 Ethernet Communication Ports on Accura 2300S ................................................................................................. 97
Fig 2.74 Connecting Accura 2300S Devices via Ethernet Communication ................................................................. 98
Fig 2.75 RS-485 Communication Port on Accura 2300S ..................................................................................................... 99
Fig 2.76 Connecting Accura 2300S Devices via RS-485 Communication.................................................................... 99
Fig 2.77 Accura 2300S Power Supply Wiring ...........................................................................................................................100
Fig 4.1 Accura 2300S Front View ...................................................................................................................................................141
Fig 4.2 Screen in Display Mode ......................................................................................................................................................142
Fig 4.3 Screen in Setup Mode .........................................................................................................................................................142
Fig 4.4 Screen in Event Mode ..........................................................................................................................................................143
Fig 4.5 Accura 2300S Front View ...................................................................................................................................................144
Fig 4.6 Temperature Sensor on Accura 2300S ........................................................................................................................145
Fig 4.7 Selecting the ID of Accura 2350 Module ...................................................................................................................146
Fig 4.8 Voltage/Current/Power/Energy Display Screen .......................................................................................................149
Fig 4.9 Voltage/Current/Power/Energy Display Screen for Each Phase ......................................................................149
Fig 4.10 Line-to-line Voltage Display Screen ...........................................................................................................................150
Fig 4.11 Phase Current Display Screen........................................................................................................................................150
Fig 4.12 Active Power Display Screen ..........................................................................................................................................151
Fig 4.13 Active Power Demand Display Screen ......................................................................................................................151
Fig 4.14 Net Energy Display Screen ..............................................................................................................................................152
Fig 4.15 Leakage Current Display Screen...................................................................................................................................152
Fig 4.16 Ethernet Connection Status Display Screen ...........................................................................................................153
Fig 4.17 Temperature Display Screen ...........................................................................................................................................154
Fig 4.18 3-Phase 4-Wire Connection(3P4W): Setup for PT Primary VL12 & Secondary V12 Values ...............157
Fig 4.19 3-Phase 3-Wire Connection(3P3W): Setup for PT Primary VL12 & Secondary V12 ..............................158
Fig 4.20 1-Phase 3-Wire Connection(1P3W): Setup for PT Primary VL12 & Secondary V13 ..............................158
Fig 4.21 1-Phase 2-Wire Connection(1P2W): Setup for PT Primary VL1 & Secondary V1N ............................158
Fig 4.22 Dip Event Setup(3-Phase 4-Wire) ................................................................................................................................164
Fig 4.23 Dip Event Setup(3-Phase 3-Wire) ................................................................................................................................164
Fig 4.24 Swell Event Setup(3-Phase 4-Wire).............................................................................................................................166
Fig 4.25 Swell Event Setup(3-Phase 3-Wire).............................................................................................................................166
Accura 2300S/2350 User Guide
Figures
â“’ 2011 Rootech Inc. All Rights Reserved
Page 17
Fig 4.26 Dip(Sag) Event Notification Screen.............................................................................................................................196
Fig 4.27 Swell Event Notification Screen ....................................................................................................................................196
Fig 4.28 Example of Event Log Number .....................................................................................................................................198
Fig 5.1 3P4W Connection with 3 PTs and 3 CTs ....................................................................................................................213
Fig 5.2 3P3W Connection with 2 PTs and 3 CTs ....................................................................................................................214
Fig 5.3 1P3W Connection with 2 PTs and 2 CTs ....................................................................................................................216
Fig 5.4 1P2W Connection with 1 PT and 1 CT ........................................................................................................................217
Fig 5.5 Calculation of 1-cycle RMS Voltage Refreshed Each Half Cycle ....................................................................218
Fig 5.6 Voltage Dip(Sag) Detection ...............................................................................................................................................218
Fig 5.7 Vector Sum for the Total Apparent Power ................................................................................................................221
Fig 5.8 Arithmetic Sum for the Total Apparent Power ........................................................................................................222
Fig 5.9 PF Sign and Phase Angle(Lead/Lag) .............................................................................................................................223
Fig 5.10 Demand Calculation ...........................................................................................................................................................224
Fig 5.11 Predicted Demand Calculation .....................................................................................................................................224
Fig 5.12 Hourly Auto Sync .................................................................................................................................................................225
Fig 5.13 Manual Sync ...........................................................................................................................................................................225
Fig 5.14 Symmetrical Components................................................................................................................................................228
Fig 5.15 Aggregation Process for Avg/Max/Min Values .....................................................................................................229
Fig 5.16 Aggregation Process for the Last Latched Values ..............................................................................................229
Chapter 1 Introduction
Accura 2300S/2350 User Guide
Page 18
â“’ 2011 Rootech Inc. All Rights Reserved
Chapter 1
Introduction
Overview
Paradigm Shift in Energy Management
When energy costs were low, energy management mainly focused on controlling the total energy supply
to all loads using switchgear panels, including incoming feeders and ABS panels for stable power supply.
However, carbon pricing policies have been implemented since 2015, and energy costs have sharply
increased. This has resulted in a rapidly growing need to manage energy usage on individual branch
loads in industrial control panels at various industrial facilities, manufacturing plants, IDC centers, etc.
Limit in Applying Digital Power Meters Used in Switchgear Panels to Distribution Panels
Installing digital power meters used in existing switchgear panels at distribution panels entails limitations,
such as narrow installation space, electrical hazards arising from the voltage and current wiring process,
and high installation costs. It makes it difficult for energy managers to access energy data on individual
branch loads and devise practical energy efficiency measures for each branch load.
Power Meters Specialized for Managing Major Branch Loads
The digital power meter product line includes Accura 2300S installed on the front of industrial control
panels, including MCC panels and Accura 2350 installed at individual branch loads inside the panels.
Accura 2300S collects power data from multiple Accura 2350 modules via internal communication and
displays measurement data on each branch load. This enables energy managers to check power data on
individual branch loads in industrial control panels, which were unavailable with the existing digital power
meters installed at switchgear panels.
Accurate Measurements: ±0.2/0.5 % of Reading (Voltage/Current) and Class 0.5S/Class
0.2S (Active Energy)
Due to greenhouse gas emission regulations, it has recently become essential to establish enterprise-
wide energy management systems for efficient energy usage at sites such as plants, manufacturing
factories, and buildings. A key factor determining the reliability of energy management systems is the
measurement accuracy of meters. Accura 2300S/2350 perform accurate voltage/current measurements
with ±0.2/±0.5 % 1 of reading accuracy. It also meets IEC 62053-22 Class 0.5S/Class 0.2S 2 standards for
active energy measurement. Thus, this allows for accurate analysis and diagnosis of various problems in
energy management at power facilities.
1. Accura 2350-3PSC/1PSC modules have ±0.5 % of reading accuracy for current measurement, and the maximum
accuracy error of ±1 % may occur according to the position of the holes
cables pass through.
2. Accura 2350-1PSCSH modules meet IEC 62053-22 Class 0.2S standards for active energy measurement.
Accura 2300S/2350 User Guide
Chapter 1 Introduction
â“’ 2011 Rootech Inc. All Rights Reserved
Page 19
A Variety of Data including Dip(Sag)/Swell Available for Power Quality Analysis
Accura 2300S/2350 provide a variety data, including dips(sags), swells and harmonics(up to 50th order),
crest factor, K-factor, and unbalance for power quality analysis. It allows energy managers to easily identify
changes in power quality in various industrial control panels at power facilities, enabling effective power
quality management.
Maximum/Minimum/Average Values Available within an Aggregation Interval
Accura 2300S/2350 calculate the average of the data collected every 0.5 seconds based on the data
measured over one cycle for various parameters, including voltage, current, and power. Based on this
data, it also provides the maximum/minimum/average values for various aggregation intervals, including
1 second, 5 seconds, 1 minute, 5 minutes, 1 hour and 6 hours. A measurement interval longer than 0.5
seconds refers to an aggregation interval.
Via communication, Accura 2300S/2350 provide not only the average value for the 0.5-second interval
but also the maximum/minimum/average values for each aggregation interval and timestamped data for
the max/min values. Since it includes measurement data that change instantaneously during aggregation
intervals, it allows for accurate trend analysis of voltage, current and power quality.
Proven Safety and Reliability with CE/UL/KC Certifications
The internal and external structures(product and circuit design) of Accura 2300S/2350 meet safety and
reliability requirements for CE (EN 55011:2009/A1:2010, EN IEC 61326-1:2021, EN IEC 61326-2-1:2021, EN
IEC 61000-3-2:2019/A1:2021, EN 61000-3-3:2013/A2:2021), UL (UL 61010-1 3rd edition, UL 61010-2-030),
and KC (EN 55011:2009/A1:2010, EN IEC 61326-1:2021, EN IEC 61326-2-1:2021) standards.
Through-Hole Type Structure for Easier and Safer Installation
Accura 2350-3P/1P power measuring modules feature the through-hole type current sensing structure
that does not require electrical contact with cables or busbars. Therefore, it ensures safety from electrical
accidents, as well as easy installations. The TM-3P terminal block also allows for easier electrical wiring.
Fig 1.1 Through-Hole Type Current Sensing Structure of Accura 2350-3P/1P Module
Chapter 1 Introduction
Accura 2300S/2350 User Guide
Page 20
â“’ 2011 Rootech Inc. All Rights Reserved
Compatible with MCCBs/ELBs with Various Ratings
Accura 2350-3P/1P power measuring modules are compatible with MCCBs/ ELBs with a range of current
ratings since they have identical installation dimensions and wiring hole positions. Thus, when installing
the products, it is possible to integrate them into the existing MCCBs/ELBs in industrial control panels.
Fig 1.2 Accura 2350 Module Compatible with MCCBs/ELBs with Various Ratings
Split-Core Structure Enabling Device Installation on Live Wires (Applicable for Split-Core
Modules)
Accura 2350-3PSC/1PSC/1PSCSH modules feature the split-core structure. It allows for the easy installation
of the products on live wires without the need to cut off power.
Fig 1.3 Installation of Accura 2350-3PSC/1PSC Module
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