ROOTECH Accura 2300S/2350 User guide

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

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

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

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

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

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

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 
 
ⓒ 2013 Rootech Inc. All Rights Reserved 
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 
 
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ⓒ 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

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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

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 Dimension 41

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 
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ⓒ 2013 Rootech Inc. All Rights Reserved 
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 
 
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ⓒ 2013 Rootech Inc. All Rights Reserved 
 
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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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

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

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

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

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ROOTECH Accura 2300S/2350 User guide

ROOTECH Accura 2300S/2350 User guide

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