ROOTECH Accura 3700 User guide

ACCURA 3700

High Accuracy Digital Power Quality Meter

Installed at multiple locations within a facility

Actually makes possible power quality measurement

User Guide[English]

Revision 1.17 2018/01/02

Digital Power Quality Meter

Accura 3700

Accura 3700 Rear

Extension Module

Accura 3700 DIO module Accura 3700 AI module Accura 3700 RTD module

Accura 3700 DI module Accura 3700 AO module Accura 3700 ELD module

Accura 3700 DO module Accura 3700 A4D2 module Accura 3700 DC module

Accura 3700 A2D4 module

Accura 3700 User Guide

Warranty Information

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 3700 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 the Accura 3700, hazardous voltages present on its terminal

strips of voltages input and power.

 Standard safety precautions are followed while performing any installation or service work

[removing PT fuses, shorting CT secondary etc.].

 Do not access to terminal strips of the Accura 3700 after installation.

Warranty Information

Accura 3700 User Guide

Warning

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

 Do not apply Accura 3700 to voltages and currents that exceed input ratings of PT and CT.

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, the Rootech, Inc’s

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

Accura 3700 User Guide

Warranty Information

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

Warranty Information

Accura 3700 User Guide

 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, 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

Accura 3700 User Guide

Notice

Standard Compliance

Process Control Equipment

E324900

MSIP-REM-RTE-ACCURA 3700

QMS-1347 KAB-QC-09

Revision History

Accura 3700 User Guide

Revision History

The following versions of the Accura 3700 User Guide has been released.

Revision

Date

Description

Revision 1.0B 2013. 02. 22 Initial draft

Revision 1.10 2014. 01. 07 First revision

Revision 1.11 2014. 02. 05 AI modified

Revision 1.12 2014. 02. 18 Modified to IEC 61000-4-30, IEC 61000-4-7

Revision 1.13 2015. 05. 21 Standard Compliance updated

Revision 1.14 2015. 07. 13 10mm size modification updated[p29]

Revision 1.15 2016. 10. 24 Navigation bookmark added

Revision 1.16 2017. 09. 20 UL Certification code changed

Revision 1.17 2018. 01. 02 Notice, Warranty changed

Accura 3700 User Guide

Contents

Chapter 1 Introduction ................................................................................................................................... 14

Overview ................................................................................................................................................... 14

Application ............................................................................................................................................... 16

Device Lineup ........................................................................................................................................... 17

Features ................................................................................................................................................................................. 18

Chapter 2 Installation ..................................................................................................................................... 21

Environmental Conditions ...................................................................................................................... 21

Before you begin ..................................................................................................................................... 21

Meter Overview ................................................................................................................................................................. 21

Components ....................................................................................................................................................................... 25

Dimension ............................................................................................................................................................................ 26

Step 1: Panel Mounting .......................................................................................................................... 28

Accura 3700 Panel Mounting ..................................................................................................................................... 28

Step 2: Voltage/Current Wiring ............................................................................................................ 29

Step 3: Accura 3700 External Communication ................................................................................... 37

Ethernet Communication .............................................................................................................................................. 37

RS-485 Communication ................................................................................................................................................ 39

Step 4: Accura 3700 Power Supply/Ground ....................................................................................... 40

Power Supply ...................................................................................................................................................................... 40

Ground Terminal ............................................................................................................................................................... 40

Step 5: Accura 3700 Extension Module Addition .............................................................................. 41

Step 6: I/O Module ................................................................................................................................. 42

DIO Module ........................................................................................................................................................................ 42

DI Module ............................................................................................................................................................................ 45

DO Module .......................................................................................................................................................................... 47

AI Module ............................................................................................................................................................................ 49

AO Module .......................................................................................................................................................................... 50

A4D2/A2D4 Module........................................................................................................................................................ 51

RTD Module ........................................................................................................................................................................ 55

ELD Module......................................................................................................................................................................... 57

DC Module .......................................................................................................................................................................... 60

Chapter 3 Operation/Setup ........................................................................................................................... 64

LED .......................................................................................................................................................................................... 64

Button Function ................................................................................................................................................................ 64

Display Mode ........................................................................................................................................... 68

Front View ............................................................................................................................................................................ 68

Display Screen.................................................................................................................................................................... 70

Contents

Accura 3700 User Guide

Measurement Parameter Display Screen .............................................................................................................. 71

Extension Module State View ..................................................................................................................................... 76

Display Screen for Classification of Extension Modules ............................................................................... 78

Event Mode .............................................................................................................................................. 85

Setup Mode .............................................................................................................................................. 93

Setup Menu ........................................................................................................................................................................ 94

METER Setup ...................................................................................................................................................................... 95

Event Setup ...................................................................................................................................................................... 103

RS-485 Communication Setup ............................................................................................................................... 109

ETHERNET Communication Setup ........................................................................................................................ 110

RESET Setup ..................................................................................................................................................................... 113

Display Setup .................................................................................................................................................................. 115

Extension Module ID Setup [MODULE] .............................................................................................................. 118

Individual Extension Module Setup ..................................................................................................................... 120

Module Setup Screen .................................................................................................................................................. 121

DI Module Setup

[dIDI]

......................................................................................................................................... 122

DO Module Setup

[doDO]

..................................................................................................................................... 123

DIO Module Setup

[dIoDIO]

............................................................................................................................... 128

AI Module Setup

[AI AI]

........................................................................................................................................ 128

AO Module Setup

[Ao AO]

.................................................................................................................................. 133

A4D2 Module Setup [MODULE]

[A4d2 A4D2]

............................................................................................. 136

A2D4 Module Setup

[A2d4A2D4]

.................................................................................................................... 137

RTD Module Setup

[rtdRTD]

............................................................................................................................... 138

ELD Module Setup

[ELdELD]

............................................................................................................................... 141

DC Module Setup

[dCDC]

.................................................................................................................................... 145

Information

[INFOInformation]

.......................................................................................................................... 154

Required Configuration Step .............................................................................................................. 155

Accura 3700 Voltage Wiring, PT Rating Configuration .............................................................................. 155

APPENDIX A Specification .......................................................................................................................... 158

APPENDIX B Standard Compliance ........................................................................................................... 160

APPENDIX C Accuracy/Reliability .............................................................................................................. 161

Accuracy ............................................................................................................................................................................. 161

Reliability ........................................................................................................................................................................... 162

APPENDIX D Ordering Information........................................................................................................... 163

INDEX .............................................................................................................................................................. 164

Accura 3700 User Guide

Figures

Fig 2.1 Accura 3700 Front ............................................................................................................................................ 21

Fig 2.2 Accura 3700 Side .............................................................................................................................................. 21

Fig 2.3 Accura 3700 Rear ............................................................................................................................................. 22

Fig 2.4 Accura 3700 DIO Module ............................................................................................................................ 23

Fig 2.5 Accura 3700 DI Module ................................................................................................................................ 23

Fig 2.6 Accura 3700 DO Module .............................................................................................................................. 23

Fig 2.7 Accura 3700 AI Module ................................................................................................................................ 23

Fig 2.8 Accura 3700 AO Module .............................................................................................................................. 23

Fig 2.9 Accura 3700 A4D2 Module ......................................................................................................................... 23

Fig 2.10 Accura 3700 A2D4 Module....................................................................................................................... 24

Fig 2.11 Accura 3700 RTD Module.......................................................................................................................... 24

Fig 2.12 Accura 3700 ELD Module .......................................................................................................................... 24

Fig 2.13 Accura 3700 DC Module ............................................................................................................................ 24

Fig 2.14 Accura 3700 Components ......................................................................................................................... 25

Fig 2.15 I/O Module Components........................................................................................................................... 25

Fig 2.16 Accura 3700 Front Dimension ................................................................................................................. 26

Fig 2.17 Accura 3700 Rear Dimension................................................................................................................... 26

Fig 2.18 Accura 3700 Side Dimension ................................................................................................................... 26

Fig 2.19 Accura 3700 I/O Module ........................................................................................................................... 26

Fig 2.20 Accura 3700 Mounting[ANSI 4”] ............................................................................................................ 28

Fig 2.21 Accura 3700 Mounting[DIN96] ............................................................................................................... 28

Fig 2.22 Voltage/Current Wiring ............................................................................................................................... 29

Fig 2.23 3 Phase 4 Wire 3PT, 3CT Wiring, Wiring Mode[CONN] = 3P4U ........................................... 31

Fig 2.24 3 Phase 3 Wire 2PT 3CT Wiring, Wiring Mode[CONN] = 3P3U ............................................ 32

Fig 2.25 3 Phase 3 Wire 2PT, 2CT wiring, Wiring Mode[CONN] = 3P3U ............................................ 32

Fig 2.26 1 Phase 3 Wire 2PT 2CT Wiring, Wiring Mode[CONN] = 1P3U ............................................ 33

Fig 2.27 1 Phase 2 Wire 1PT 1CT Wiring, Wiring Mode[CONN] = 1P2U ............................................ 33

Fig 2.28 3 Phase 4 Wire Direct 3CT Wiring, Wiring Mode[CONN] =3P4U ......................................... 34

Fig 2.29 3 Phase 3 Wire Voltage Direct 3CT Wiring, Wiring Mode[CONN]=3P3U ......................... 34

Fig 2.30 3 Phase 3 Wire Voltage Direct 2CT Wiring, Wiring Mode[CONN]=3P3U ......................... 35

Fig 2.31 1 Phase 3 Wire Voltage Direct 2CT Wiring, Wiring Mode[CONN]=1P3U ......................... 35

Fig 2.32 1 Phase 3 Wire Voltage Direct 1CT Wiring, Wiring Mode[CONN]=1P2U ......................... 36

Fig 2.33 Accura 3700 Ethernet Communication Port ..................................................................................... 37

Fig 2.34 Accura 3700 Ehternet Connection ........................................................................................................ 38

Figures

Accura 3700 User Guide

Fig 2.35 Accura 3700 RS-485 Communication .................................................................................................. 39

Fig 2.36 Accura 3700 RS-485 Communication Connection ........................................................................ 39

Fig 2.37 Accura 3700 Power Supply ....................................................................................................................... 40

Fig 2.38 I/O Module Addition.................................................................................................................................... 41

Fig 2.39 DIO Module ...................................................................................................................................................... 42

Fig 2.40 Digital Input (Dual Input Structure) ...................................................................................................... 43

Fig 2.41 DC Relay Application ................................................................................................................................... 44

Fig 2.42 AC Relay Application .................................................................................................................................... 44

Fig 2.43 DI Module ......................................................................................................................................................... 45

Fig 2.44 Digital Input (Dual Input Structure) ...................................................................................................... 46

Fig 2.45 DO Module ....................................................................................................................................................... 47

Fig 2.46 DC Relay Application ................................................................................................................................... 48

Fig 2.47 AC Relay Application .................................................................................................................................... 48

Fig 2.48 AI Module .......................................................................................................................................................... 49

Fig 2.49 Analog Input .................................................................................................................................................... 49

Fig 2.50 AO Module ....................................................................................................................................................... 50

Fig 2.51 AO Module Analog Output ...................................................................................................................... 50

Fig 2.52 A4D2 Module .................................................................................................................................................. 51

Fig 2.53 A2D4 Module .................................................................................................................................................. 51

Fig 2.54 A4D2/A2D4 Module Analog Output .................................................................................................... 52

Fig 2.55 DC Relay Application ................................................................................................................................... 53

Fig 2.56 AC Relay Application .................................................................................................................................... 54

Fig 2.57 RTD Module ..................................................................................................................................................... 55

Fig 2.58 RTD Input ........................................................................................................................................................... 56

Fig 2.59 ELD Module ...................................................................................................................................................... 57

Fig 2.60 ELD Input ........................................................................................................................................................... 57

Fig 2.61 DC Relay Application ................................................................................................................................... 59

Fig 2.62 AC Relay Application .................................................................................................................................... 59

Fig 2.63 DC Module ........................................................................................................................................................ 60

Fig 2.64 DC Voltage/Current ...................................................................................................................................... 60

Fig 2.65 Digital Input(Dual Input Structure) ........................................................................................................ 61

Fig 2.66 DC Relay Application ................................................................................................................................... 63

Fig 2.67 AC Relay application .................................................................................................................................... 63

Fig 3.1 Accura 3700 Front Composition ............................................................................................................... 64

Fig 3.2 DISPLAY Mode Screen Example ................................................................................................................ 65

Fig 3.3 SETUP Mode Screen Example .................................................................................................................... 65

Accura 3700 User Guide

Figures

Fig 3.4 Event Mode Screen Example ...................................................................................................................... 66

Fig 3.5 Accura 3700 Front Overview ...................................................................................................................... 68

Fig 3.6 First Screen of Display Mode ..................................................................................................................... 71

Fig 3.7 Voltage/Current/Power Display Screen for Each Phase................................................................. 71

Fig 3.8 Line to Line Voltage Specific Measurement Value Display Screen .......................................... 72

Fig 3.9 Line to Neutral Current Specific Measurement Value Display Screen ................................... 72

Fig 3.10 Power Specific Measurement Value Display Screen ..................................................................... 73

Fig 3.11 Demand Active Power Specific Measurement Value Display Screen ................................... 73

Fig 3.12 NET Energy Display Screen in Energy Display Screen ................................................................. 74

Fig 3.13 Ethernet Connection State Display Screen ........................................................................................ 74

Fig 3.14 Temperature Display Screen in ETC Display Screen ..................................................................... 75

Fig 3.15 First Screen Displaying ID of the Extension Module .................................................................... 76

Fig 3.16 Display Screen of Extension Module[Ex: DIO module] in Module Screen ........................ 76

Fig 3.17 Display Screen of the Second Extension Module in Module Screen................................... 77

Fig 3.18 DIO Module First Screen ............................................................................................................................ 79

Fig 3.19 DI Module First Screen ............................................................................................................................... 80

Fig 3.20 DO Module First Screen ............................................................................................................................. 80

Fig 3.21 AI Module First Screen ............................................................................................................................... 81

Fig 3.22 AO Module First Screen ............................................................................................................................. 82

Fig 3.23 A4D2 Module First Screen ........................................................................................................................ 82

Fig 3.24 A2D4 Module First Screen ........................................................................................................................ 83

Fig 3.25 RTD Module First Screen ........................................................................................................................... 83

Fig 3.26 ELD Module First Screen ............................................................................................................................ 84

Fig 3.27 DC Module First Screen.............................................................................................................................. 84

Fig 3.28 Dip[Sag] Event Alarm Screen ................................................................................................................... 85

Fig 3.29 Swell Event Alarm Screen .......................................................................................................................... 85

Fig 3.30 Event Log Number Example ..................................................................................................................... 87

Fig 3.31 Demand Measuring Method .................................................................................................................... 97

Fig 3.32 Power Sign[General Calculation] ............................................................................................................ 98

Fig 3.33 Difference between Two Methods that Calculate Each Phase Sum Power ................... 100

Fig 3.34 Dip Event Setup[3P3U] ............................................................................................................................. 105

Fig 3.35 Dip Event Setup[3P4U] ............................................................................................................................. 105

Fig 3.36 Swell Event Setup[3P3U] ......................................................................................................................... 107

Fig 3.37 Swell Event Setup[3P4U] ......................................................................................................................... 107

Chapter 1 Introduction

Accura 3700 User Guide

Chapter 1 Introduction

Overview

Advent of Power Quality Management Era of Switchgear Panel

Due to the problems of power supply, power facility, and load, various power quality problems

such as Dip[Sag]/Swell are often generated in a moment at switchgear panel. Finding the cause

of problems by the power quality analysis, energy management supervisor has to make proper

preventive or post steps.

0.2% Reading/IEC62053-22 Class 0.2S Accuracy

Recently enterprise energy management system establishment is required for effective energy use

and preventive management to prepare CO2 emission management in plant, factory and

building. The key factor to determine reliability of energy management is the degree of measuring

accuracy of power meter. Accura 3700 performs 0.2% high accuracy measurements for voltage

and current, and conforms to IEC62053-22 class 0.2S for power and energy. This makes it

possible to precisely analyze and diagnose various problems with energy management and power

facilities.

True RMS Measurement

Accura 3700 performs 128 sampling/cycle True RMS measurement for the high non-linear loads.

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

Accura 3700 provides various power quality information such as Dip[Sag], Swell, harmonic

information[up to 63 harmonics], Crest factor, K-factor, and unbalance. This makes it possible for

energy management supervisor to easily find the power quality change in the power facility.

Quality information conforms to IEC61000-4-30.

Aggregation Interval Maximum/Minimum/Average Information

Accura 3700 provides the average value that corresponds to 0.2 second interval from the

measurement value by cycle unit. Based on 0.2 second interval average value, Accura 3700

provides the average of 1 second, 5 seconds, 1 minute, 5 minutes, 1 hour and 6 hours intervals.

This measurement interval that is longer than 0.2 second means the aggregation interval.

Accura 3700 provides not only the 0.2 second interval average value of measurement parameter,

but also statistic data(maximum/minimum/average) of voltage, current and power by

Accura 3700 User Guide

Chapter 1 Introduction

communication. As this includes the data measurement parameter which changes in a moment,

this makes it possible to do accurate trend analysis for voltage, current and power quality.

CE, UL, KCC, FCC Safety and Reliability

The structure[framework, circuit, fire] of Accura 3700 conforms to standard, CE[EN61326-1,

EN61326-2-1], UL[UL61010-1], KCC[KN22, KN24], FCC[Part15 Subpart B].

Additional Function Provision by Module Extension Structure at the Rear of Meter

Module extension structure that the modules are easily added to the rear of Accura 3700

physically can flexibly handle with the additional function requirement. Modules are options and

provide various functions such as digital input/output, digital input, digital output, analog input,

analog output, analog/pulse output, RTD input, leakage current measurement and DC

measurement per each type. Modules can be added up to three modules regardless of order and

the same module can be selected. But AO module can be added up to two.

Chapter 1 Introduction

Accura 3700 User Guide

Application

High-Reliability Energy Management

Energy management is specified into various application services such as power quality

management, cost management, demand power management, power facility replacement, and

energy plan connecting with upper level program. The most important thing that decides the data

reliability of energy management is the accuracy degree of digital meter. As Accura 3700

performs Reading 0.2% high-accuracy measurement for voltage and current, and power/energy

conforms to the compliance IEC62053-22 Class 0.2S, it enables construction of accurate energy

management system.

Preventive/Post Measures for Power Facility Operation Management

Accura 3700 provides various functions like energy usage management, power facility

management, power quality management and high-efficiency facility analysis management. This

enables energy management supervisor to make proper preventive or post measures by

suggesting accurate analytical standard of judgement for power usage and quality.

Enterprise Energy Management

Accura 3700 mounted on various switchgear panels in the power facilities and Accura

2300[2300S]/2350 mounted on branch loads inside the distribution panel provide the power

quality information which is essential for energy management. This realizes the true enterprise

energy management system by total-measuring the power receiving-based switchgear panels and

power usage-based distribution panels.

Accura 3700 User Guide

Chapter 1 Introduction

Device Lineup

Accura 3700 is high-accurate power quality meter which has Dip/Swell detecting functions of

IEC61000-4-30, and harmonic wave analysis up to 63 harmonics with accurate power

measurement functions of IEC62053-22 Class 0.2S.

Also, Accura 3700 provides various I/O functions which can increase the field availability. I/O

function is provided by the module structure adding to the rear of Accura 3700 and various

modules are provided corresponding to the composition of I/O channels. The modules can be

added up to three regardless of order, and the same module can be selected. But AO module can

be added up to two.

Device

Model

Description

Power Quality Meter Accura 3700 Voltage/ current/power measurement

Power quality measurement

For both Ethernet[supports star, daisy chain, ring connection]

and RS-485 communication

Temperature in distribution panel 1

Digital I/O Module DIO DI 8 channels, DO 2 channels 2

DI DI 12 channels

DO DO 6 channels 2

Analog I/O Module AI AI 6 channels

AO AO 6 channels 3

Digital and Analog A4D2 AO 4 channels 3 + DO 2 channels 2

I/O Module A2D4 AO 2 channels 3 + DO 4 channels 2

Special-purpose Module RTD RTD input 3 channels

Supports PT100, PT1000

Supports 2-Wire, 3-Wire, 4-Wire

ELD Uses voltage-type ZCT

Leakage current input 6 channels, DO 1channel 2

DC DC voltage input 1 channel, DC current input 2 channels, DI

4 channels, DO 1 channel 2

1 It is not for firewatching, but for reference only[A temp sensor is positioned on the side of Accrua 3700].

2 DO channel supports the ON/OFF output[Latch], pulse, periodic pulse and energy pulse.

3 AO channels outputs various electricity amount or command value of communication by converting as 0 ~

20mA.

Chapter 1 Introduction

Accura 3700 User Guide

Features

Accura 3700 Power Quality Meter

Accura 3700 performs 0.2% Reading accurate measurement for voltage and current,

power/energy conforms to IEC62053-22 Class 0.2S. Also it provides various information such as

Dip[Sag], Swell, harmonics, Crest factor, K-factor, unbalance, etc. which is essential for power

quality management of switchgear panels.

Accura 3700

Function

Measurement

Display

Realtime measurement data LCD display

Analog graphic display corresponding to the measurement

amount

General

Sampling/cycle 128

Commercial frequency 50/60Hz

True RMS measurement Voltage, current: Reading

0.2%

Frequency 42 ~ 69Hz

Neutral current[I

n

]2

Demand, peak demand, prediction demand 1, 2

Maximum, minimum

Maximum 2, minimum2, average2 in the aggregation

interval 3

Energy

kWh/kVarh received, kWh/kVarh delivered IEC62053-22 Class 0.2S

kWh/kVarh net[kWh/kVarh received - kWh/kVarh delivered] IEC62053-22 Class 0.2S

kWh/kVarh sum[kWh/kVarh received + kWh/kVarh

delivered]

IEC62053-22 Class 0.2S

Power Quality

Voltage/current harmonics information Up to 63 harmonics

Voltage/Current THD4, current TDD5 Up to 63 harmonics

Crest factor 6, 2, K-factor 7, 2

Dip[Sag], Swell IEC61000-4-30

Unbalance[voltage, current] 2 IEC61000-4-30, NEMA

MG1

Vector diagram 2

Harmonic analysis graph[voltage, current] 2

Oscilloscope 2

Demand trend 2

Event

Dip[Sag], Swell event detection Half cycle moving 1-

cycle RMS Measuring

Digital Input, analog input event detection8 1msec

Number of Event Log Up to 500

Accura 3700 User Guide

Chapter 1 Introduction

Extension Module Addition

Number of IO Modules which can be added to the rear of

meter

Up to 3EA, 2EA(AO)

Temperature

Temperature in the distribution panel 9 1EA

Communication

Ethernet [100Mbps/Full Duplex, Ethernet switching 10, RSTP11,

Modbus TCP protocol]

2 ports[Ethernet1,

Ethernet2]

RS-485[1,200 ~ 115,200bps, Modbus RTU protocol] 1 port [Ta, Tb]

General

UL certification UL61010-1

CE certification EN61326-1, EN61326-

2-1

FCC certification Part15 Subpart B

KCC certification KN22, KN24

AC Power AC 85 ~ 265V

DC Power DC 100 ~ 300V

1 Calculates the prediction demand power supposing the power of present point in the demand interval to be

the same for the remaining interval.

2 Data can be achieved by not be displayed on LCD and only by the communication.

3 Accura 3700 provides statistic data of maximum, minimum, average for voltage, current power by

communication. As this includes the data of measurement parameter which changes in a moment, this

performs accurate trend-analysis for about voltage, current and power quality.

4 THD[Total harmonic distortion]. Voltage THD:  







 , Current THD:  









5 TDD[Total demand distortion]. Current TDD:  









But,  can be done by the configuring default current or Peak demand current [through communication].

6 Crest factor: 

 , 7 K-factor: (

)













8 Available when the module is mounted.

9 It is not for firewatching, but for reference only[A temp sensor is positioned on the side of Accrua 3700].

10 As Ethernet switch is built-in, Accura 3700 Ethernet connection is available among Accura 3700s without

the extra external switch.

11 RSTP[Rapid Spanning Tree Protocol], IEEE 802.1D-2004

Chapter 1 Introduction

Accura 3700 User Guide

I/O Module

Accura 3700 provides various modules can be physically easily added on the rear of meter as an

option. Modules can be added up to three regardless of order, and the same module can be

selected. But AO module can be added up to two.

I/O Module

Feature

Model

Channel

Specification

DIO module Digital Input 8 channels Dry Contact, dualization

Digital Output 2 channels AC/DC 400V 350mA[max. 1A] 3

DI module Digital Input 12channels Dry Contact, dualization

DO module Digital Output 6 channels AC/DC 400V 350mA[max. 1A] 3

AI module Analog Input 6 channels DC 0 ~ 20mA

AO module Analog Output 6 channels DC 4 ~ 20mA, DC 0 ~ 20mA

A4D2 module Analog Output 4 channels DC 4 ~ 20mA, DC 0 ~ 20mA

Pulse Output 2 channels AC/DC 400V 350mA[max. 1A] 3

A2D4 module Analog Output 2 channels DC 4 ~ 20mA, DC 0 ~ 20mA

Pulse Output 4 channels AC/DC 400V 350mA[max. 1A] 3

RTD module RTD Input 3 channels PT100, PT1000 4,3,2 line form

ELD module LeakCurrent Input 6 channels AC 0 ~ 2,000mA

Digital Output 1 channel AC/DC 400V 350mA[max. 1A] 3

DC module DC Voltage Input 1 channel 0 ~ 200V

DC Current Input 2 channels 0 ~ 100mV[Shunt Needed]

Digital Input 4 channels Dry Contact, dualization

Digital Output 1 channels AC/DC 400V 350mA[max. 1A] 3

Operation

Digital Input Detecting Period 1msec

Analog Input Detecting Period 1msec

Analog output [Measurement

Connected] Controlling Period 200msec

Analog output [Communication

Connected] Controlling Period 20msec

General

UL Certification UL61010-1

CE Certification EN61326-1, EN61326-2-1

FCC Certification Part15 Subpart B

KCC Certification KN22, KN24

Power Supply Accura 3700

1 Digital output supports the ON/OFF output, single pulse output, periodic pulse output and energy pulse

output.

2 Analog output outputs electricity amount measured at the device or command value of communication by

converting as 0 ~ 20mA.

3 Peak AC / DC value, and max 1A current is energizing cycle 100ms one-shot current.

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ROOTECH Accura 3700 User guide

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