ROOTECH Accura 2300/2350 User guide

ACCURA 2300/2350

Distribution Panel Digital Power Meter/Power Measuring Module

Actually makes possible enterprise energy management

User Guide[English]

Revision 1.33 2019/09/25

Distribution Panel Digital Power Meter

Accura 2300 Front

Accura 2300 Rear

Accura 2300-RS-485 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 2350-DO

Accura 2350-IDC

Accura 2350-VDC

Accura 2350-DCM-50V-80A

Accura 2350-DCM-500V-80A

Accura 2300/2350 User Guide

Notice

Page 5

Notice

Symbol

Caution

Indicates the presence of dangerous voltage which can cause severe injury or death to persons

if proper precautions are not followed.

Warning

Alerts the user to the presence of hazards which can cause somewhat injury to persons,

damage to property or damage to the device itself, if proper precautions are not followed.

Note

Indicates the user’s attention to installation, operating and maintenance instructions.

Indicates alternative voltage or current.

Indicates direct voltage or current.

Installation Considerations

Installation and operation of Accura 2300/2350 should be performed only by qualified, competent personnel

that have appropriate training and experience with high voltage and current devices.

Caution

Failure to observe the following instructions may result in severe injury or death.

 During normal operation of Accura 2300/2350, hazardous voltages are present on its terminal strips of

voltages input and power.

 Standard safety precautions are as followed while performing any installation or service work[removing PT

fuses, shorting CT secondaries, etc.].

 Do not access to terminal strips of Accura 2300/2350 after installation.

Warning

Observe the following instructions, or permanent damage to the meter may occur.

Notice

Accura 2300/2350 User Guide

Page 6

 Do not apply Accura 2300/2350 to voltages and currents that exceed Input ratings of PT and CT

 To use device in the other way than specified by manufacturer can cause severe damage.

 Connect ground terminal to the earth ground to protect device from noise and surge.

 Terminal screw torque is as followed.

- barrier-type voltage terminal: 1.35Nm[1.00 ft-lbf] max.

- barrier-type digital inputs/digital output terminal: 0.90Nm[0.66 ft.lbf] max.

About Manual

Rootech Inc. reserves the right to make changes in the device specifications shown in this User Guide without

notice. Rootech Inc. advises customers to obtain the latest specifications of device before giving orders to

confirm that the information being relied on by the customer is up to date.

In the absence of written agreement to the contrary, Rootech Inc. assumes no liability for Rootech Inc.

applications assistance, customer’s system design, or infringement of patents or copyrights of third parties by

or arising from the use of devices described herein.

The information contained in this document is believed to be accurate at the time of publication, however,

Rootech Inc. assumes no responsibility for any errors which may appear here 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

anything relating to this product shall be limited to the price paid for the product.

Accura 2300/2350 User Guide

Warranty

Page 7

Warranty

For products and software that are sold or licensed by Rootech Inc. during the period from the date of receipt

by you until the present, Rootech warrants only to the original purchaser.

The purchased products shall be substantially free from material defects in material and workmanship by

Rootech for two years from the date receipt by you.

The software itself is provided “as is” without any warranty of any kind.

In order for the original purchaser to make a claim under the warranties described above, the original

purchaser must promptly contact Rootech headquarter. After receiving such notice, Rootech may either in

Rootech’s sole discretion, examine the product at the original purchaser’s site or issue shipping instructions to

the original purchaser to return the relevant product to Rootech for examination at the original purchaser’s

expense, transportation charges prepaid.

If after examining the product Rootech reasonably confirms that such examined product does not meet the

warranties, then the original purchaser’s sole remedy and Rootech’s sole obligation or liability shall be, at

Rootech’s option, to repair, replace or refund the price paid for that product.

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.

The warranty claims for defects caused by any of the following factors are not covered.

 Improper use(alteration, accident, misuse, abuse) or Failure to act in accordance with installation,

operation or maintenance instructions

 Unauthorized modifications, changes or attempted repairs

 Failure to comply with applicable safety standards & regulations

 Damages when transporting or storing

 Damages by force majeure, examples are(not necessarily limited): fire, flood, earthquakes, storm damage,

overvoltage & lightning

 If the original identify markings(trade-mark, serial number, etc) have been defaced, altered, or removed

Rootech shall not be liable for any other claim than a claim solely for the breach of one of the above

warranties that is made in accordance with the above described procedures- made by the original purchaser,

Warranty Information

Accura 2300/2350 User Guide

Page 8

its employees, agents, or contractors for any loss, damage, or expense incurred due to, caused by, or related

to any purchased product.

Any technical assistance provided by Rootech's personnel or representatives in system design shall be deemed

to be a proposal and not a recommendation. The responsibility for determining the feasibility of such

proposals lies with the original purchaser and should be tested by the original purchaser.

It is the original purchaser’s responsibility to determine the suitability of any product and associated

documentation for its purposes. The original purchaser acknowledges that 100% "up" time is not realizable

because of possible hardware or software defects. The original purchaser recognizes that such defects and

failures may cause inaccuracies or malfunctions.

Only the terms expressed in these limited Warranties shall apply and no distributor, corporation or other entity,

individual or employee of Rootech or any other entity is authorized to amend, modify or extend the Warranties

in any way.

Standard Compliance

Process Control Equipment

E324900

MSIP-REM-RTE-ACCURA 2300

QMS-1347

KAB-QC-09

Accura 2300/2350 User Guide

Revision History

Page 9

Revision History

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

Revision

Date

Description

Revision 1.0

2011. 10. 22

Initial draft

Revision 1.1

2012. 05. 09

Split-core power measuring modules added

Revision 1.11

2013. 09. 03

Accura 2350 module weight added

Revision 1.12

2014. 02. 06

Device photo part changed[button]

Revision 1.13

2014. 05. 23

Single diagram modified

Revision 1.14

2015. 01. 29

Rear side plate modified

Revision 1.15

2015. 05. 21

Standard compliance added and logo image updated

Revision 1.20

2016. 12. 22

Bookmark added, event added and event backlight blink alarm

Setup screen updated and chapter 5 measurement description added

Revision 1.30

2018. 09. 17

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

Revision 1.31

2018. 12. 03

Product image updated

Description of the connection number of Accura 2350 special module

Clear description of reading error

Revision 1.32

2019. 05. 31

Added detailed description of DO pulse generation related to energy

Revision 1.33

2019. 09. 25

Return to Accura 2350 module management policy

Voltage THD: extended to 40th harmonic (voltage 384-sampling/cycle)

Added measurement description for harmonics

Contents

Accura 2300/2350 User Guide

Page 10

Contents

Chapter 1 Introduction .............................................................................................................................. 17

Overview ........................................................................................................................................................ 17

Application ...................................................................................................................................................... 20

Device Lineup .................................................................................................................................................. 21

Distribution Panel Digital Meter/Power Measuring Module .......................................................................... 21

Special-Purpose Module ........................................................................................................................... 22

Installation Example ................................................................................................................................. 23

Features .................................................................................................................................................. 25

Chapter 2 Installation ............................................................................................................................... 30

Environmental Conditions ................................................................................................................................ 30

Before you begin ............................................................................................................................................. 31

Meter Overview ....................................................................................................................................... 31

Components ............................................................................................................................................ 33

Dimension ............................................................................................................................................... 35

Installation Diagram ................................................................................................................................ 42

Step 1: Mounting ............................................................................................................................................. 44

Accura 2300 Mounting ............................................................................................................................ 44

Accura 2350-3P Three-phase Power Measuring Module Mounting ............................................................. 45

Accura 2350-1P Single-phase Power Measuring Module Mounting ............................................................ 52

Accura 2350-3PSC Split-core Three-phase Power Measuring Module Mounting .......................................... 59

Accura 2350-1PSC Split-core Single-phase Power Measuring Module Mounting ......................................... 64

Accura 2350-1PSCSH Split-core Single-phase Single-hole Power Measuring Module Mounting ................... 69

Step 2: Accura 2300 Wiring ............................................................................................................................. 73

Accura 2300 Voltage Connection ............................................................................................................. 73

Accura 2300 Digital Input/Output Wiring .................................................................................................. 78

Step 3: Accura 2350 Current Through-hole Wiring ........................................................................................... 81

Accura 2350-3P[1P, 1PSH] Power Measuring Module Through-hole Wiring ................................................. 81

Accura 2350 Single-phase Single-hole Power Measuring Module Through-hole Wiring ............................... 86

Step 4: Accura 2300/2350 Combination of Communication ............................................................................. 89

Step 5: Accura 2300 External Communication .................................................................................................. 91

Ethernet Communication .......................................................................................................................... 91

RS-485 Communication[Option] ............................................................................................................... 93

Step 6: Accura 2300 Power Supply and Ground ................................................................................................ 94

Power Supply ........................................................................................................................................... 94

Ground Terminal ..................................................................................................................................... 94

Chapter 3 Accura 2350 Operation/Setup ................................................................................................... 95

Operation Mode ............................................................................................................................................. 95

Button Operation ............................................................................................................................................. 95

Accura 2350-3P[3PSC] Three-phase Power Measuring Module .......................................................................... 96

Accura 2300/2350 User Guide

Contents

Page 11

Application Model .................................................................................................................................... 96

Display Mode .......................................................................................................................................... 96

Setup Mode ............................................................................................................................................. 98

Accura 2350-1P[1PSC] Single-phase Power Measuring Module ....................................................................... 106

Application Model .................................................................................................................................. 106

Display Mode ........................................................................................................................................ 106

Setup Mode ........................................................................................................................................... 107

Accura 2350-1PSCSH Split-core Single-phase Single-hole Power Measuring Module ........................................ 116

Application Model .................................................................................................................................. 116

Display Mode ........................................................................................................................................ 116

Setup Mode ........................................................................................................................................... 117

Chapter 4 Accura 2300 Operation/Setup ................................................................................................. 127

Device Configuration ..................................................................................................................................... 127

Operation Mode .................................................................................................................................... 127

LED Display ........................................................................................................................................... 127

Button Operation ................................................................................................................................... 127

Display Mode ................................................................................................................................................ 129

Front Display ......................................................................................................................................... 129

Accura 2350 Module ID Selection ........................................................................................................... 131

Display Full Screen ................................................................................................................................. 132

Voltage/Current/Power/Energy ............................................................................................................... 133

Voltage/Frequency ................................................................................................................................. 133

Current ................................................................................................................................................. 134

Power/Power Factor ................................................................................................................................ 134

Demand ................................................................................................................................................ 135

Active Energy ......................................................................................................................................... 135

Leakage Current .................................................................................................................................... 135

Ethernet Information .............................................................................................................................. 136

Temperature/Time .................................................................................................................................. 137

Setup Mode ................................................................................................................................................... 138

Setup Full Screen ................................................................................................................................... 139

Measurement Setup ............................................................................................................................... 140

Event Setup ............................................................................................................................................ 145

Accura 2350 Module ID Setup ................................................................................................................ 155

Accura 2350-1P Group Device Setup ...................................................................................................... 159

Ethernet Communication Setup ............................................................................................................... 162

RS-485 Communication Setup ................................................................................................................ 165

Reset ..................................................................................................................................................... 167

Digital Input/Output Setup...................................................................................................................... 168

Display Setup ......................................................................................................................................... 173

Information ........................................................................................................................................... 176

Event Log Mode ............................................................................................................................................. 177

Start Event and End Event ....................................................................................................................... 177

Contents

Accura 2300/2350 User Guide

Page 12

Start Event Alarm Generation ................................................................................................................. 177

Start Event Alarm Clearing ..................................................................................................................... 177

Button Function ...................................................................................................................................... 178

Event Log Number ................................................................................................................................. 179

Event Time-stamp .................................................................................................................................. 179

Dip Event Log ........................................................................................................................................ 180

Swell Event Log ...................................................................................................................................... 180

Fuse Fail Event Log ................................................................................................................................. 181

Temperature Event Log ........................................................................................................................... 181

Current Event Log .................................................................................................................................. 182

Leakage Current Event Log ..................................................................................................................... 182

Demand Current Event Log .................................................................................................................... 183

No Event Log ......................................................................................................................................... 183

Required Setup Step ....................................................................................................................................... 184

Step 1: Accura 2300 Connection, PT Rating ............................................................................................ 184

Step 2: Accura 2350 Communication ID Auto-Assignment and Update .................................................... 185

Step 3: Accura 2300 Ethernet Setup ........................................................................................................ 188

Chapter 5 Measurement Description ........................................................................................................ 189

General Measurement ................................................................................................................................... 189

Measurement Event ....................................................................................................................................... 191

Measurement for Voltage Connection ............................................................................................................. 192

3-Phase 4-Wire ...................................................................................................................................... 192

3-Phase 3-Wire ...................................................................................................................................... 193

1-Phase 3-Wire ...................................................................................................................................... 195

1-Phase 2-Wire ...................................................................................................................................... 196

Dip[Sag]/Swell Measurement ......................................................................................................................... 197

Leakage Current Measurement ...................................................................................................................... 198

Residual Voltage Measurement ....................................................................................................................... 198

Residual Current Measurement ...................................................................................................................... 198

Phase Power Measurement ............................................................................................................................. 199

Three-phase Total Power Measurement ........................................................................................................... 200

Power Factor(PF) Measurement ....................................................................................................................... 201

PF Phase Angle Status Measurement ............................................................................................................... 202

Demand Measurement .................................................................................................................................. 203

Voltage Harmonics ........................................................................................................................................ 204

Current Harmonics ........................................................................................................................................ 204

Unbalance(NEMA MG1) ................................................................................................................................ 205

Sequence Unbalance ..................................................................................................................................... 206

Aggregation .................................................................................................................................................. 207

APPENDIX A Specification ........................................................................................................................ 209

APPENDIX B Standard Compliance .......................................................................................................... 214

Accura 2300/2350 User Guide

Contents

Page 13

APPENDIX C Accuracy/Reliability ............................................................................................................. 215

Accuracy................................................................................................................................................ 215

Reliability ............................................................................................................................................... 216

APPENDIX D Ordering Information .......................................................................................................... 217

Contents

Accura 2300/2350 User Guide

Page 14

Figures

Fig 1.1 Accura 2350-3P[1P] Through-hole Structure .................................................................................. 18

Fig 1.2 Accura 2350-3P[1P] Compatibility with MCCB/ELB in Dimension .................................................... 19

Fig 1.3 Accura 2350-3PSC[1PSC] Split-core three[single]-phase Power Measuring Module Installation ......... 19

Fig 1.4 Power Measuring Module Installation Example ............................................................................... 23

Fig 1.5 Split-core Power Measuring Module Installation Example ................................................................ 24

Fig 2.1 Accura 2300 Front ....................................................................................................................... 31

Fig 2.2 Accura 2300 Side ......................................................................................................................... 31

Fig 2.3 Accura 2300 Rear ........................................................................................................................ 31

Fig 2.4 Accura 2350-3P[1P] Power Measuring Module ............................................................................... 32

Fig 2.5 Accura 2350-3PSC[1PSC, 1PSCSH] Split-core Power Measuring Module ......................................... 32

Fig 2.6 Accura 2300 Component ............................................................................................................. 33

Fig 2.7 Accura 2350-3P Three-phase Power Measuring Module Component .............................................. 33

Fig 2.8 Accura 2350-1P Single-phase Power Measuring Module Component ............................................. 33

Fig 2.9 Accura 2350-3PSC Split-core Three-phase Power Measuring Module Component ........................... 34

Fig 2.10 Accura 2350-1PSC Split-core Single-phase Power Measuring Module Component ........................ 34

Fig 2.11 Accura 2350-1PSCSH Split-core Single-phase Single-hole Power Measuring Module Component .. 34

Fig 2.12 TM-3P Three-phase Terminal Component .................................................................................... 34

Fig 2.13 TM-1P Single-phase Terminal Component ................................................................................... 34

Fig 2.14 Accura 2300 Front Dimension..................................................................................................... 35

Fig 2.15 Accura 2300 Side Dimension ...................................................................................................... 35

Fig 2.16 Accura 2300 Rear Dimension ..................................................................................................... 35

Fig 2.17 Accura 2350-3P Three-phase Power Measuring Module Dimension .............................................. 36

Fig 2.18 TM-3P Three-phase Terminal Dimension ...................................................................................... 36

Fig 2.19 Accura 2350-1P Single-phase Power Measuring Module Dimension ............................................. 37

Fig 2.20 TM-1P Single-phase Terminal Dimension ..................................................................................... 37

Fig 2.21 Accura 2350-1PSH PSH Single-phase Single-hole Power Measuring Module Dimension ................ 38

Fig 2.22 Accura 2350-3PSC Split-core Three-phase Power Measuring Module Dimension ........................... 38

Fig 2.23 Accura 2350-1PSC Split-core Single-phase Power Measuring Module Dimension .......................... 39

Fig 2.24 Accura 2350-1PSCSH Split-core Single-phase Single-hole Power Measuring Module Dimension .... 40

Fig 2.25 Accura 2300/2350-3P[1P] Power Measuring Module Installation .................................................. 42

Fig 2.26 Accura 2300/2350-3PSC[1PSC, 1PSCSH] Split-core Power Measuring Module Installation ............ 43

Fig 2.27 Accura 2300 Mounting ............................................................................................................... 44

Fig 2.28 Accura 2350-3P Power Measuring Module Mounting ................................................................... 45

Fig 2.29 Accura 2350-3P Three-Phase Terminal Panel Perforation .............................................................. 46

Fig 2.30 Accura 2350-3P Mounting Plate / Terminal Panel Perforation ........................................................ 50

Fig 2.31 Accura 2350-1P Power Measuring Module Mounting ................................................................... 52

Fig 2.32 Accura 2350-1P Single-Phase Terminal Panel Perforation ............................................................. 53

Fig 2.33 Accura 2350-1P Mounting Plate / Terminal Panel Perforation ........................................................ 57

Fig 2.34 Accura 2350-3PSC Split-core Power Measuring Module New Installation ...................................... 59

Fig 2.35 Accura 2350-3PSC Split-core Three-phase Power Measuring Module Panel Perforation .................. 60

Fig 2.36 Accura 2350-3PSC Split-core Mounting Plate Panel Perforation ..................................................... 62

Fig 2.37 Accura 2350-3PSC Split-core Power Measuring Module Remodeling Installation ........................... 63

Accura 2300/2350 User Guide

Contents

Page 15

Fig 2.38 Accura 2350-1PSC Split-core Power Measuring Module New Installation ...................................... 64

Fig 2.39 Accura 2350-1PSC Split-core Single-phase Power Measuring Module Panel Perforation ................. 65

Fig 2.40 Accura 2350-1PSC Split-core Mounting Plate Panel Perforation ..................................................... 67

Fig 2.41 Accura 2350-1PSC Split-core Power Measuring Module Remodeling Installation ........................... 68

Fig 2.42 Accura 2350-1PSCSH Split-core Power Measuring Module New Installation .................................. 69

Fig 2.43 Accura 2350-1PSCSH Split-core Power Measuring Module Panel Perforation ................................. 70

Fig 2.44 Accura 2350-1PSCSH Split-core Mounting Plate Panel Perforation ................................................ 71

Fig 2.45 Accura 2350-1PSCSH Split-core Power Measuring Module Remodeling Installation ....................... 72

Fig 2.46 Accura 2300 Voltage Connection ................................................................................................ 73

Fig 2.47 3-phase 4-wire, Direct Connection .............................................................................................. 74

Fig 2.48 3-phase 4-wire, 3PT Connection ................................................................................................. 74

Fig 2.49 3-phase 3-wire, Direct Connection .............................................................................................. 75

Fig 2.50 Three-phase 3-wire, 2PT Connection ........................................................................................... 75

Fig 2.51 Single-phase 3-wire, Direct Connection ....................................................................................... 76

Fig 2.52 Single-phase 3-wire, 2PT Connection .......................................................................................... 76

Fig 2.53 Single-phase 2-wire, Direct Connection ....................................................................................... 77

Fig 2.54 Single-phase 2-wire, 1PT Connection .......................................................................................... 77

Fig 2.55 Accura 2300 Digital Input/Output Channel ................................................................................. 78

Fig 2.56 Digital Input ............................................................................................................................... 79

Fig 2.57 DC Relay application .................................................................................................................. 80

Fig 2.58 AC Relay application .................................................................................................................. 80

Fig 2.59 Three-phase 4-wire/3-wire, Direct Through-hole Wiring ............................................................... 83

Fig 2.60 Three-phase 4-wire/3-wire, 3CT Through-hole Wiring ................................................................. 83

Fig 2.61 Three-phase 3-wire, 2CT Through-hole Wiring ............................................................................ 84

Fig 2.62 Single-phase LN[Line-to-neutral] Through-hole Wiring ................................................................. 85

Fig 2.63 Single-phase LL[Line-to-line] Through-hole Wiring ....................................................................... 85

Fig 2.64 Three-Module Group Device for 3P4W/3P3W connection ............................................................ 87

Fig 2.65 Two-Module Group Device for 3P3W connection ......................................................................... 87

Fig 2.66 Single-phase LN[Line-to-neutral] Single-hole Module Through-hole Wiring ................................... 88

Fig 2.67 Single-phase LL[Line-to-line] Single-hole Module Through-hole Wiring ......................................... 88

Fig 2.68 Accura 2300/2350 Combination Example of Communication ...................................................... 89

Fig 2.69 Accura 2300 Ethernet communication port .................................................................................. 91

Fig 2.70 Accura 2300 Ethernet Connection ............................................................................................... 92

Fig 2.71 Accura 2300 RS-485 Communication[Option] ............................................................................. 93

Fig 2.72 Accura 2300 RS-485 Communication connection ........................................................................ 93

Fig 2.73 Accura 2300 Power Supply ......................................................................................................... 94

Fig 4.1 Accura 2300 Front configuration ................................................................................................. 127

Fig 4.2 Screen of Display Mode .............................................................................................................. 128

Fig 4.3 Screen of Setup Mode ................................................................................................................. 128

Fig 4.4 Screen of Event Log Mode ........................................................................................................... 128

Fig 4.5 Accura 2300 Front View.............................................................................................................. 129

Fig 4.6 Accura 2300 Temperature Sensor ................................................................................................ 130

Fig 4.7 Accura 2350 Module ID Selection at upper part of LCD Screen .................................................... 131

Fig 4.8 Voltage/Current/Power/Energy Display Screen ............................................................................. 133

Contents

Accura 2300/2350 User Guide

Page 16

Fig 4.9 Voltage/Current/Power/Energy Display Screen for each phase ...................................................... 133

Fig 4.10 Line-to-line Voltage Display Screen ............................................................................................ 133

Fig 4.11 Current Display Screen ............................................................................................................. 134

Fig 4.12 Active Power Display Screen ...................................................................................................... 134

Fig 4.13 Demand Active Power Display Screen ........................................................................................ 135

Fig 4.14 Net Energy Display Screen ........................................................................................................ 135

Fig 4.15 Leakage Current Display Screen ................................................................................................ 136

Fig 4.16 Ethernet Connection Status Display Screen ................................................................................. 136

Fig 4.17 Temperature Display Screen ...................................................................................................... 137

Fig 4.18 3-phase 4-wire connection[3P4W]: PT Primary VAB , Secondary V12 .............................................. 140

Fig 4.19 3-phase 3-wire connection[3P3W]: PT Primary VAB , Secondary V12 .............................................. 141

Fig 4.20 1-phase 3-wire connection[1P3W]: PT Primary VL12 , Secondary V13 ............................................. 141

Fig 4.21 1-phase 2-wire connection[1P2W]: PT Primary VL12 , Secondary V1N ............................................. 141

Fig 4.22 Dip Event Setup[3-phase 4-wire] ............................................................................................... 146

Fig 4.23 Dip Event Setup[3-phase 3-wire] ............................................................................................... 146

Fig 4.24 Swell Event Setup[3-phase 4-wire] ............................................................................................. 148

Fig 4.25 Swell Event Setup[3-phase 3-wire] ............................................................................................. 148

Fig 4.26 Dip[Sag] Event Alarm Display .................................................................................................... 177

Fig 4.27 Swell Event Alarm Display ......................................................................................................... 177

Fig 4.28 Event Log Number Example ...................................................................................................... 179

Fig 5.1 3PT 3CT Wiring, 3P4W Connection ............................................................................................. 192

Fig 5.2 2PT 3CT Wiring, 3P3W Connection ............................................................................................. 193

Fig 5.3 2PT 2CT Wiring, 1P3W Connection ............................................................................................. 195

Fig 5.4 1PT 1CT Wiring, 1P2W Connection ............................................................................................. 196

Fig 5.5 Half-cycle Refreshed 1-cycle RMS Calculation .............................................................................. 197

Fig 5.6 Voltage Dip[Sag] Detection ......................................................................................................... 197

Fig 5.7 Vector Sum for Total Apparent Power ........................................................................................... 200

Fig 5.8 Arithmetic Sum for Total Apparent Power ..................................................................................... 201

Fig 5.9 Power Sign and PF Phase Angle Status ......................................................................................... 202

Fig 5.10 Demand Calculation ................................................................................................................ 203

Fig 5.11 Prediction Demand Calculation ................................................................................................. 203

Fig 5.12 Voltage FFT Data Processing (~MCU F/W 3.50) ........................................................................ 204

Fig 5.13 Voltage FFT Data Processing (MCU F/W 3.51~) ........................................................................ 204

Fig 5.14 Current FFT Data Processing ..................................................................................................... 204

Fig 5.15 Symmetrical Components ......................................................................................................... 206

Fig 5.16 Aggregation Process ................................................................................................................. 207

Accura 2300/2350 User Guide

Chapter 1 Introduction

Page 17

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 2300[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 2300 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 2300/2350 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.

Dip[Sag]/Swell[IEC61000-4-30], Power Quality

Accura 2300 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

Chapter 1 Introduction

Accura 2300/2350 User Guide

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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 2300 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 2300 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.

CE/UL Safety and Reliability

The structure-framework, circuit, and fire of Accura 2300/2350 conforms to standard CE[EN61326-1,

EN61326-2-1, EN61010-1] and UL[UL61010-1].

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

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.

Accura 2300/2350 User Guide

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Page 19

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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Application

Enterprise Energy Management

Providing energy information of branch loads in distribution panel, Accura 2300/2350 together with Accura

3300S/3500S/3550S/3700/7500 mounted in switchgear panels truly makes it possible to realize enterprise

energy management.

CO2 Emission Management by Reduction of High Energy Cost

Accura 2300/2350 provides power quality information which enables management of energy use, power

facility operation and high efficiency device analysis. This can be an infrastructure essential for managing of

CO2 emission, presenting analytic criterion on energy use status to energy management supervisor.

Energy Efficiency Verification of High Efficiency Device

Accura 2300/2350 provides high accuracy energy information to determine the efficiency of high efficiency

device such as LED, lighting, motor, and power facility.

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ROOTECH Accura 2300/2350 User guide

ROOTECH Accura 2300/2350 User guide

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