ROOTECH Accura 2500/2550[DC] User guide

U

ser Guide [English]

R

evision 1.60 March 8, 2023

Energy Solution for

Human & Nature

ACCURA

Smart DC Distribution Panel Digital Power

Meter/Power Measuring Module

Provide the Best Multi-functional Smart Device Solution

2500/2550[DC]

(

UL Certification Process Underway)

Smart Distribution Panel Digital Power Meter

Main Distribution Panel Module

Accura 2500M Front Accura 2500M Rear

Main Distribution Panel Module + Main Distribution Panel

HMI Module

Main Distribution Panel Module with Voltage Divider

Accura 2500D/2500M Front Accura 2500M-VD Front

Main Distribution Panel HMI Module

Accura 2500D Front Accura 2500D Rear

DC Power Measuring Module DC Power Measuring Module DC Terminal Block

Accura 2550CMD-1P-250A TM-CM-1P-105

Accura 2550CMD-1P-1500A Accura 2550CMD-1P-125A TM-CM-1P-60

Accura 2550CMD-1P-100A TM-CM-1P-50L

Accura 2550CMD-1P-750A Accura 2550CMD-1P-60A TM-CM-1P-50

DC Power Measuring Meter

Accura 2550DCM-500V-80A Accura 2550DCM-50V-80A

Special-purpose Modules

Accura 2550TEMP Accura TSEN

Accura 2550GW

Accura 2500/2550 User Guide [DC] Notice

Notice

Symbols

Caution

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

proper precautions are not followed.

Caution

Alerts users of the presence of hazards which can cause injury to persons, property damage

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

Note

Indicates major instructions for the installation, operation, and maintenance of the product.

Indicates alternative voltage or current.

Indicates direct voltage or current.

Installation Considerations

The installation, operation, and maintenance of the product should be performed only by qualified,

competent personnel that have received appropriate training for high voltage and current devices.

Caution

If hazardous voltages are mishandled while installing and operating the product in the field, it can cause

serious injury or death.

 This device must be installed and serviced only by qualified personnel who have in-depth knowledge of

installing, commissioning and operating the device and have had appropriate training. He or she should

have read and understood the various safety measures and warnings stated in the instructions.

 Before carrying out any work on the device, switch off the power supply to the device.

 Always use an appropriate voltage detection device to confirm the absence of voltage.

 Always power the device with the correct rated voltage.

 Install the device in a suitable electrical cabinet by following recommended installation instructions.

Failure to take these precautions could cause serious injuries or death.

Notice Accura 2500/2550 User Guide [DC]

Caution

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

To ensure that the device operates correctly, make sure that:

 The device is correctly installed.

 The auxiliary power supply voltage indicated on the product is observed: AC 100 – 240 V, DC 100 –

300 V

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 amount actually paid by customers for the product.

Accura 2500/2550 User Guide [DC] Warranty

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 2500/2550 User Guide [DC]

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.

No agency, corporate entity, or employee of Rootech or other companies has authority to amend, modify

or extend the terms and conditions of this warranty in any way without express written authorization from

Rootech, Inc.

Standards Compliance

Energy-usage Monitor

E522977 (Certification Process Underway)

R-R-RTE-Accura2500

Accura 2500/2550 User Guide [DC] Revision History

Revision History

The revision history of Accura 2500/2550 User Guide[DC] is as follows.

Revision Date Description

Revision 1.00 March 20, 2020 First issue

Revision 1.10 October 14, 2020 Updated content related to events

Modified content about accuracy

Revision 1.20 December 3, 2020 Added the Appendix B Module Connection

Changed description of accuracy

Added content on the start event of power quality events

Revision 1.21 January 8, 2021 Changed errors in set values for the aggregation of the Max/Min

values.

Revision 1.30 June 14, 2021 Divided the product manual into the AC and DC versions of Accura

2550CM module

Changed the name of Accura 2550CMD module for DC current

measurement

Added Accura 2550DCM module for DC voltage and current

measurement

Modified content on custom events

Added Accura 2550CMD-1P-750A model

Changed the maximum current value of Accura 2550CMD module

(170% -> 120%)

Changed the type of the internal communication cable for the

display module

Added the Locale item to system setup items

Revision 1.31 September 10, 2021 Added the Accura 2500M/Voltage Divider device for high DC voltage

measurement

Revision 1.40 March 30, 2022 Modified content on module connection

Added special-purpose modules

Added Accura 2550CMD-1P-1500A model

Changed content on event settings

Added the unipolar connection mode

Added content on standards, as well as the network setup parameter

Updated the setup section of Accura 2550DCM meter

Revision 1.41 July 18, 2022 Updated data on the product certifications

Revision 1.50 December 12, 2022 Changed the maximum measuring range of Accura 2550DCM-50V

module to 60 V

Revision 1.60 March 8, 2023 Changed the maximum measuring range of Accura 2550CMD-1P-

1500A module to 2,200 A

Changed the dimensions, components, and installation method for

Accura 2550CMD-1P-1500A module

Contents Accura 2500/2550 User Guide [DC]

Contents

Chapter 1

Product Introduction ..................................................................................................................................... 18

Overview .................................................................................................................................................................................................................. 18

Product Information ........................................................................................................................................................................................... 20

Smart DC Distribution Panel Digital Power Meter ..................................................................................................................... 20

Special-purpose Module ......................................................................................................................................................................... 21

Installation Example .................................................................................................................................................................................. 22

Product Features ......................................................................................................................................................................................... 24

Chapter 2

Installation ....................................................................................................................................................... 28

Conditions for Installation ............................................................................................................................................................................... 28

Before Installation ................................................................................................................................................................................................ 29

Product Appearance ................................................................................................................................................................................. 29

Components ................................................................................................................................................................................................. 34

Dimensions .................................................................................................................................................................................................... 38

Installation Example .................................................................................................................................................................................. 43

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

Mounting Accura 2500D on the Panel ............................................................................................................................................ 44

Mounting Accura 2500M on the Panel ........................................................................................................................................... 45

Mounting Accura 2550CMD on the Panel ..................................................................................................................................... 48

Installation of Accura 2550DCM ......................................................................................................................................................... 53

Step 2: Wiring Accura 2500M Module ...................................................................................................................................................... 54

Voltage Wiring of Accura 2500M ....................................................................................................................................................... 54

Voltage Wiring of Accura 2500M-VD ............................................................................................................................................... 57

Control Power Supply /Ground Wiring ............................................................................................................................................ 59

Step 3: Connecting Accura 2500M with 2500D via the Communication Cable .................................................................... 61

Step 4A: Current Wiring of Accura 2550CMD Module...................................................................................................................... 63

Direct Connection to Accura 2550CMD-1P Module ................................................................................................................. 63

Through-hole Wiring of Accura 2550CMD-1P Module ........................................................................................................... 65

Step 4B: Voltage/Current Wiring of Accura 2550DCM ...................................................................................................................... 66

Step 5: Connecting Accura 2500M with 2550 Modules ................................................................................................................... 67

Step 6: Connecting Accura 2500M Modules for External Communication ............................................................................. 69

Ethernet Communication ........................................................................................................................................................................ 69

RS-485 Communication .......................................................................................................................................................................... 71

Chapter 3

Accura 2500M ................................................................................................................................................. 72

Device Composition ........................................................................................................................................................................................... 72

Control Power Supply ............................................................................................................................................................................... 73

Voltage Terminal Block ............................................................................................................................................................................ 74

Ethernet Port for External Communication .................................................................................................................................... 76

Accura 2500/2550 User Guide [DC] Contents

RS-485 Port for External Communication ....................................................................................................................................... 78

Communication Port for Connection with the HMI DISPLAY Module ............................................................................. 79

Communication Ports for Connection with Accura 2550 Modules .................................................................................... 80

LED Status Indicators ................................................................................................................................................................................ 81

Functions .................................................................................................................................................................................................................. 82

External Communication with the Host System .......................................................................................................................... 82

Measurements.............................................................................................................................................................................................. 82

Power Quality ............................................................................................................................................................................................... 83

Events ............................................................................................................................................................................................................... 83

Controls of Accura 2550 Modules...................................................................................................................................................... 85

Accura 2500D Interface ........................................................................................................................................................................... 85

Chapter 4

Accura 2500D .................................................................................................................................................. 86

Device Composition ........................................................................................................................................................................................... 86

Connection .............................................................................................................................................................................................................. 88

DISPLAY (HOME) Mode .................................................................................................................................................................................... 89

Screen Composition .................................................................................................................................................................................. 89

Display Screen of Accura 2550CMD Module ................................................................................................................................ 90

Display Screen of Accura 2550DCM Meter ................................................................................................................................... 94

SETUP Mode .......................................................................................................................................................................................................... 95

Screen Composition .................................................................................................................................................................................. 95

Accura 2500M Setup ................................................................................................................................................................................ 95

Accura 2550CMD Setup ....................................................................................................................................................................... 102

Accura 2550DCM Setup ....................................................................................................................................................................... 105

EVENT Mode ....................................................................................................................................................................................................... 109

Screen Composition ............................................................................................................................................................................... 109

Measurement Events ............................................................................................................................................................................. 110

Power Quality Events ............................................................................................................................................................................. 111

SYSTEM Events.......................................................................................................................................................................................... 112

Necessary Steps for Device Setup ............................................................................................................................................................ 113

Step 1: Setup for the Measured Voltage Type of Accura 2500M .................................................................................... 113

Step 2: Voltage Wiring and Reference Voltage Setup of Accura 2500M ..................................................................... 113

Step 3: Module ID Setup of Accura 2550 Modules ................................................................................................................ 113

Step 4: Ethernet Setup of Accura 2500M .................................................................................................................................... 113

Chapter 5

Accura 2550 ................................................................................................................................................... 114

Operation Mode ...................................................................................................................................................................................... 114

Button Operation..................................................................................................................................................................................... 114

Accura 2550CMD .............................................................................................................................................................................................. 115

Applied Models ........................................................................................................................................................................................ 115

LCD Display ................................................................................................................................................................................................ 115

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

Contents Accura 2500/2550 User Guide [DC]

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

Accura 2550DCM .............................................................................................................................................................................................. 120

Applied Models ........................................................................................................................................................................................ 120

LCD Display ................................................................................................................................................................................................ 120

Display Mode ............................................................................................................................................................................................ 121

Setup Mode ............................................................................................................................................................................................... 122

Chapter 6 Functions ......................................................................................................................................................... 125

Voltage/Current Sampling ............................................................................................................................................................................ 125

Voltage Sensing........................................................................................................................................................................................ 125

Current Sensing ........................................................................................................................................................................................ 125

Voltage and Current Sensing of Accura 2550DCM ................................................................................................................. 126

Measuring Time ....................................................................................................................................................................................... 126

Calculation Per Subframe .................................................................................................................................................................... 126

Measurements .................................................................................................................................................................................................... 127

Measurement Parameters .................................................................................................................................................................... 127

Voltage Wiring .......................................................................................................................................................................................... 128

Power ............................................................................................................................................................................................................. 133

Energy ........................................................................................................................................................................................................... 133

Capacitance Estimation ......................................................................................................................................................................... 134

Events ..................................................................................................................................................................................................................... 136

Power Quality Events ............................................................................................................................................................................. 136

Measurement Events ............................................................................................................................................................................. 137

System Events ........................................................................................................................................................................................... 140

Providing Event Notifications and Resetting Notification Settings ................................................................................. 140

Aggregation......................................................................................................................................................................................................... 142

Fixed Aggregation ................................................................................................................................................................................... 142

Custom Aggregation ............................................................................................................................................................................. 143

Collection of Aggregated Data ......................................................................................................................................................... 143

Appendix A

Specifications ............................................................................................................................................. 144

General Specifications ........................................................................................................................................................................... 144

Accura 2500M Main Distribution Panel Module ...................................................................................................................... 144

Accura 2500D Main Distribution Panel HMI Module ............................................................................................................ 147

Accura 2550CMD-1P DC Power Measuring Module .............................................................................................................. 148

Accura 2550DCM DC Power Measuring Meter ........................................................................................................................ 150

Appendix B

Module Connection .................................................................................................................................. 152

Limitation in the Length of the Communication Cable due to Voltage Drops ......................................................... 152

Limitation in the Number of Connectable Modules due to Power Consumption .................................................. 153

Limitation in the Number of Connectable Modules in a Single Group........................................................................ 153

Connecting Modules in Two Groups ............................................................................................................................................. 155

Accura 2500/2550 User Guide [DC] Contents

Appendix C Standards ..................................................................................................................................................... 156

Appendix D

Accuracy/Reliability .................................................................................................................................. 157

Accuracy ....................................................................................................................................................................................................... 157

Reliability ..................................................................................................................................................................................................... 158

Appendix E

Ordering Information ............................................................................................................................... 159

Accura 2500/2550 Smart DC Distribution Panel Digital Power Meter .......................................................................... 159

Special-purpose Modules .................................................................................................................................................................... 159

Figures Accura 2500/2550 User Guide [DC]

Figures

Fig 1.1 Identical Lengths of Accura 2550CMD and MCCBs with Various Ratings ....................................................... 19

Fig 1.2 Through-hole type Current Sensing Structure of Accura 2550CMD .................................................................. 19

Fig 1.3 Combined Installation of Accura 2500D and 2500M ................................................................................................. 22

Fig 1.4 Connection of Accura 2500D and 2500M using Communication Cables ........................................................ 23

Fig 2.1 Accura 2500M Front ................................................................................................................................................................... 29

Fig 2.2 Accura 2500M Side ..................................................................................................................................................................... 29

Fig 2.3 Accura 2500M Rear .................................................................................................................................................................... 29

Fig 2.5 Accura 2500M-VD Side ............................................................................................................................................................. 30

Fig 2.6 Accura 2500M-VD Rear ............................................................................................................................................................ 30

Fig 2.7 Accura 2500D Front .................................................................................................................................................................... 31

Fig 2.8 Accura 2500D Side ...................................................................................................................................................................... 31

Fig 2.9 Accura 2500D Rear ..................................................................................................................................................................... 31

Fig 2.10 Accura 2550CMD ...................................................................................................................................................................... 32

Fig 2.11 Accura 2550DCM ...................................................................................................................................................................... 33

Fig 2.12 TM-CM-1P-105........................................................................................................................................................................... 33

Fig 2.13 TM- CM-1P-60/50L/50 ........................................................................................................................................................... 33

Fig 2.15 Accura 2500M-VD Components ........................................................................................................................................ 34

Fig 2.16 Accura 2500D Components ................................................................................................................................................. 35

Fig 2.17 Components of Accura 2550CMD-1P-1500A Model ............................................................................................... 35

Fig 2.18 Components of Accura 2550CMD-1P-750A Model ................................................................................................. 36

Fig 2.19 Components of Accura 2550CMD-1P-250A Model ................................................................................................. 36

Fig 2.20 Components of Accura 2550CMD-1P-125A/100A/60A Model ........................................................................... 36

Fig 2.21 Accura 2550DCM Components .......................................................................................................................................... 37

Fig 2.22 Components of TM-CM-1P-105 Terminal Block ........................................................................................................ 37

Fig 2.23 Components of TM-CM-1P-60/50L/50 Terminal Block ........................................................................................... 37

Fig 2.24 Accura 2500D/2500M Dimensions ................................................................................................................................... 39

Fig 2.25 Accura 2500D Dimensions .................................................................................................................................................... 39

Fig 2.26 Accura 2550CMD-1P Dimensions ..................................................................................................................................... 40

Fig 2.27 Accura 2550DCM Dimensions ............................................................................................................................................ 41

Fig 2.28 TM-CM-1P Dimensions .......................................................................................................................................................... 42

Fig 2.29 Installation Diagram of Accura 2500M/ 2500D/ 2550CMD Modules .............................................................. 43

Fig 2.30 Mounting Accura 2500D on the Panel ........................................................................................................................... 44

Fig 2.31 Mounting Accura 2500M on the Panel .......................................................................................................................... 45

Fig 2.32 Mounting Accura 2500M-VD on the Panel .................................................................................................................. 46

Fig 2.33 Combined Installation of Accura 2500M and 2500D .............................................................................................. 47

Fig 2.34 Mounting Accura 2550CMD on the Panel .................................................................................................................... 48

Fig 2.35 Installing Accura 2550CMD-1P-1500A ............................................................................................................................ 49

Fig 2.36 Installing Accura 2550CMD-1P-750A through Mounting Holes (Mounting Plate/Busbar) ................... 50

Accura 2500/2550 User Guide [DC] Figures

Fig 2.37 Installling Accura 2550CMD-1P through Mounting Holes (Mounting Plate/Terminal Block) .............. 50

Fig 2.38 Panel Mounting .......................................................................................................................................................................... 53

Fig 2.39 DIN Rail Mounting.................................................................................................................................................................... 53

Fig 2.38 Voltage Wiring of Accura 2500M ...................................................................................................................................... 54

Fig 2.41 1DC2W Connection .................................................................................................................................................................. 55

Fig 2.42 2DC3W Connection .................................................................................................................................................................. 55

Fig 2.43 3DC4W Connection .................................................................................................................................................................. 56

Fig 2.44 Bipolar(3W) Connection ......................................................................................................................................................... 56

Fig 2.45 DC Voltage Connection of Accura 2500M-VD ............................................................................................................ 57

Fig 2.46 1DC2W Connection of Accura 2500M-VD .................................................................................................................... 58

Fig 2.47 Bipolar(3W) Connection of Accura 2500M-VD ........................................................................................................... 58

Fig 2.48 Unipolar(2W) Connection of Accura 2500M-VD ........................................................................................................ 59

Fig 2.49 Control Power Supply Wiring of Accura 2500M ........................................................................................................ 59

Fig 2.50 DISPLAY Port on Accura 2500M ........................................................................................................................................ 61

Fig 2.51 Accura 2500D Rear ................................................................................................................................................................... 61

Fig 2.52 Connecting Accura 2500M with 2500D using the Communication Cable .................................................... 62

Fig 2.53 Wiring of Accura 2550CMD-1P-1500A Module ......................................................................................................... 63

Fig 2.54 Wiring of Accura 2550CMD-1P-750A Module ............................................................................................................ 64

Fig 2.55 Through-hole Wiring of Accura 2550CMD-1P-250A Module ............................................................................. 65

Fig 2.56 Through-hole Wiring of Accura 2550CMD-1P-125A/100A/60A Module ....................................................... 65

Fig 2.57 Wiring of Accura 2550DCM ................................................................................................................................................. 66

Fig 2.58 Connection between Accura 2500M/2550 Modules using Internal Communication Cables ............... 68

Fig 2.59 Ethernet Ports on Accura 2500M ...................................................................................................................................... 69

Fig 2.60 Connecting Accura 2500M Modules via Ethernet Communication .................................................................. 70

Fig 2.61 RS-485 Port on Accura 2500M ........................................................................................................................................... 71

Fig 2.62 Connecting Accura 2500M Modules via RS-485 Communication .................................................................... 71

Fig 3.1 Device Composition of Accura 2500M .............................................................................................................................. 72

Fig 3.2 Control Power Supply of Accura 2500M .......................................................................................................................... 73

Fig 3.3 Voltage Wiring of Accura 2500M......................................................................................................................................... 74

Fig 3.4 Voltage Wiring of Acura 2500M-VD................................................................................................................................... 75

Fig 3.5 Ethernet Ports on Accura 2500M ......................................................................................................................................... 76

Fig 3.6 Connecting Accura 2500M Modules with Ethernet Cables for External Communication ........................ 77

(Daisy-chain & Ring Topology) ............................................................................................................................................................. 77

Fig 3.7 RS-485 Port on Accura 2500M ............................................................................................................................................. 78

Fig 3.8 Connecting Accura 2500M Modules with the RS-485 Cable for External Communication .................... 78

Fig 3.9 Combined Connection between Accura 2500M and Accura 2500D .................................................................. 79

Fig 3.10 Connecting Accura 2500M with Accura 2500D using the Communication Cable .................................... 79

Fig 3.11 Connection Example of Accura 2500 and Accura 2550 Modules ..................................................................... 80

Fig 3.12 Block Diagram of Custom Events ...................................................................................................................................... 84

Fig 4.1 Accura 2500D Device Composition .................................................................................................................................... 86

Figures Accura 2500/2550 User Guide [DC]

Fig 4.2 Combined Connection with Accura 2500M .................................................................................................................... 88

Fig 4.3 Connection with Accura 2500M using the Communication Cable ..................................................................... 88

Fig 4.4 SUMMARY Measurement Screen ......................................................................................................................................... 90

Fig 4.5 DC Voltage Measurement Screen ........................................................................................................................................ 91

Fig 4.6 Current Measurement Screen ................................................................................................................................................ 91

Fig 4.7 DC Power Measurement Screen ........................................................................................................................................... 92

Fig 4.8 DC Energy Measurement Screen ......................................................................................................................................... 92

Fig 4.9 Waveform Measurement Screen .......................................................................................................................................... 93

Fig 4.10 Description Screen .................................................................................................................................................................... 93

Fig 4.11 DO(Digital Output) Information Screen ......................................................................................................................... 94

Fig 4.12 SUMMARY Setup Screen ....................................................................................................................................................... 96

Fig 4.13 Voltage Measurement Setup Screen ............................................................................................................................... 96

Fig 4.14 Changed Item Displayed ....................................................................................................................................................... 97

Fig 4.15 Dip Event Setup Screen.......................................................................................................................................................... 97

Fig 4.16 Ethernet Communication Setup Screen ......................................................................................................................... 98

Fig 4.17 Main CMD Setup Screen ....................................................................................................................................................... 99

Fig 4.18 Reset Screen ................................................................................................................................................................................ 99

Fig 4.19 Description Setup Screen .................................................................................................................................................... 100

Fig 4.20 SUMMARY Setup Screen ..................................................................................................................................................... 102

Fig 4.21 Current Measurement Setup Screen .............................................................................................................................. 102

Fig 4.22 Current Event Setup Screen ............................................................................................................................................... 103

Fig 4.23 DC Adjustment Setup Screen ............................................................................................................................................ 104

Fig 4.24 Description Setup Screen .................................................................................................................................................... 104

Fig 4.25 SUMMARY Setup Screen ..................................................................................................................................................... 105

Fig 4.26 Voltage Measurement Setup Screen ............................................................................................................................. 105

Fig 4.27 Voltage Event Setup Screen ............................................................................................................................................... 106

Fig 4.28 DO Setup Screen ..................................................................................................................................................................... 107

Fig 4.29 DC Adjustment Setup Screen ............................................................................................................................................ 108

Fig 4.30 Description Screen .................................................................................................................................................................. 108

Fig 4.31 SUMMARY Event Screen ...................................................................................................................................................... 110

Fig 4.32 Measurement Event Screen ................................................................................................................................................ 110

Fig 4.33 RMS/DC Trend Screen........................................................................................................................................................... 111

Fig 4.34 Power Quality Event Screen ............................................................................................................................................... 111

Fig 4.35 RMS/DC Trend Screen........................................................................................................................................................... 112

Fig 4.36 SYSTEM Events Screen .......................................................................................................................................................... 112

Fig 6.1 Voltage Sensing and Signal Processing .......................................................................................................................... 125

Fig 6.2 Current Sensing and Signal Processing .......................................................................................................................... 125

Fig 6.3 Voltage and Current Sensing and Signal Processing ............................................................................................... 126

Fig 6.4 DC Voltage Wiring with a Single Wire (1DC2W) ........................................................................................................ 128

Fig 6.5 DC Voltage Wiring with 2 Wires and a Common Ground Wire (2DC3W) ..................................................... 129

Accura 2500/2550 User Guide [DC] Figures

Fig 6.6 DC Voltage Wiring with 3 Wires and a Common Ground Wire (3DC4W) ..................................................... 130

Fig 6.7 Bipolar DC Voltage Wiring with a Common Ground Wire .................................................................................... 131

Fig 6.8 Unipolar DC Voltage Wiring ................................................................................................................................................. 132

Fig 6.9 Equivalent Circuit of a Capacitor ........................................................................................................................................ 134

Fig 6.10 Voltage Dip Detection .......................................................................................................................................................... 136

Fig 6.10 Block Diagram of Custom Events .................................................................................................................................... 138

Fig 6.12 「Over」 Condition Detection ............................................................................................................................................ 139

Fig 6.13 「Under」 Condition Detection ......................................................................................................................................... 139

Fig 6.14 Aggregation Process .............................................................................................................................................................. 142

Fig B.1 Module Connection Diagram in a Single Group........................................................................................................ 154

Fig B.2 Module Connection Diagram in Two Groups .............................................................................................................. 155

Chapter 1 Product Introduction Accura 2500/2550 User Guide [DC]

Chapter 1

Product Introduction

Overview

Voltage, Current, and Power Measurement in AC/DC Distribution Panels

Accura 2500M module measures both AC and DC voltage. However, Accura 2550 modules are divided into

the modules that measure AC current and DC current, respectively. Therefore, you should use the Accura

2550 module that suits your needs according to the AC/ DC voltage specifications of distribution panels.

Dip(Sag)/Swell Data Available for Power Quality Analysis

Accura 2500/2550 provide data on voltage dips and swells for power quality analysis. It allows energy

managers to easily identify changes in power quality in various distribution panels at power facilities,

enabling effective power quality management.

Highly Accurate Measurements of Voltage, Current, Power and Energy

Recently, it has become essential to establish enterprise-wide energy management systems for efficient

energy usage at sites such as plants, factories, and buildings due to greenhouse gas emission regulations.

A key factor determining reliability of energy management systems is the measurement accuracy of meters.

Accura 2500/2550 provide highly accurate measurements of voltage/current/ power/energy, enabling

accurate analysis and diagnosis of various problems in energy management at power facilities.

Max/Min/Average Values Available within an Aggregation Interval

Accura 2500/2550 provide measured values for every 0.2-second frame based on voltage, current, and power

values measured for each subframe (16.7 ms or 20 ms). It also provides the maximum/minimum/average

values for various aggregation intervals, including 1 second, 5 seconds, 1 minute, 5 minutes, 1 hour and 6

hours, as well as timestamped data for the max/min values. Since it offers measurement data that change

instantaneously in aggregation intervals, it allows for accurate trend analysis of voltage, current and power.

It also helps to reduce workload on data collection and calculation of the host system.

Proven Safety and Reliability with CE/UL/KC Certifications(UL Certification Process

Underway)

Accura 2500/2550's internal and external structures(product and circuit design) meet safety and reliability

requirements for CE(EN 55011, EN IEC 61326-1, EN IEC 61326-2-1, EN IEC 61000-3-2, EN 61000-3-3),

UL(UL61010-1 3rd edition, IEC 61010-2-030 2nd edition), and KC(EN 55011, EN IEC 61326-1, EN IEC 61326-

2-1) standards.

Accura 2500/2550 User Guide [DC] Chapter 1 Product Introduction

Compatible with MCCBs with Various Ratings / Compact Size

Accura 2550CMD module is compatible with MCCBs with various current ratings since it has identical

installation dimensions and wiring hole positions. Thus, it can be installed with existing MCCBs in distribution

panels. Its compact size with minimized width also allows for easy installation.

Fig 1.1 Identical Lengths of Accura 2550CMD and MCCBs with Various Ratings

Through-hole Type Structure for Easier and Safer Installation

Accura 2550CMD module features the through-hole type current sensing structure with busbars, which

does not require electrical contact with cables, including busbars. Therefore, it ensures safety from electrical

accidents, as well as easy installations. The TM-CM terminal block allows for easier electrical wiring.

Fig 1.2 Through-hole type Current Sensing Structure of Accura 2550CMD

Chapter 1 Product Introduction Accura 2500/2550 User Guide [DC]

Product Information

Smart DC Distribution Panel Digital Power Meter

The Smart DC Distribution Panel Digital Power Meter product line consists of Accura 2500D installed at the

front of the distribution panel, Accura 2500M installed inside the distribution panel or at the rear of Accura

2500D, Accura 2550CMD installed at branch lines in the distribution panel and Accura 2550DCM, which

directly measures DC voltage and current simultaneously.

Accura 2500M module receives measurement data from multiple Accura 2550CMD/DCM modules via

internal communication and provides the data through Accura 2500D. Accura 2500M can be combined with

Accura 2500D. Thus, users can install it by connecting it to the back of Accura 2500D, or it can be installed

separately.

Module Type Model Description Weight

Main distribution

panel module

Accura 2500M Measures the voltage of the incoming line in the

AC/DC distribution panel

500 g

Transmits the sampled voltage data to Accura

2550

Receives measurement data from Accura 2550

Sends/receives set values and measured data

to/from Accura 2500D

Communicates with the host system

Can be attached/detached to/from the back of

Accura 2500D

Accura 2500M-VD Voltage Divider is attached to Accura 2500M. 620 g

Measures high voltages in DC distribution panels

Main distribution Accura 2500D 5” Color TFT LCD (built-in touch panel) 400 g

panel HMI module Sends/receives set values and measured data

to/from Accura 2500M

Displays measured values and allows users to

set

up parameters on the LCD screen

Accura 2500M can be attached/detached

to/from the back of Accura 2500D.

DC power measuring Accura 2550CMD-1P -1500A

Basic current 1,500 Adc 3,000 g

module -750A Basic current 750 Adc 850 g

-250A Basic current 250 Adc 125 g

-125A Basic current 125 Adc 85 g

-100A Basic current 100 Adc 80 g

-60A Basic current 60 Adc 80 g

DC power measuring Accura 2550DCM-500V -80A Basic voltage 500 Vdc / Basic current 80 Adc 250 g

meter Accura 2550DCM-50V -80A Basic voltage 50 Vdc / Basic current 80 Adc 250 g

Terminal block for TM-CM-1P -105 Accura 2550CMD-1P-250A terminal block 240 g

Accura 2550CMD -60 Accura 2550CMD-1P-125A terminal block 135 g

-50L Accura 2550CMD-1P-100A terminal block 125 g

-50 Accura 2550CMD-1P-60A terminal block 90 g

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ROOTECH Accura 2500/2550[DC] User guide

ROOTECH Accura 2500/2550[DC] User guide

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