ROOTECH ACCURA 3700 Series User manual

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 1.12 2014/02/18

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

ⓒ2014 Rootech Inc. All Rights Reserved Page 3
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.

Notice Accura 3700 User Guide
Page 4 ⓒ2014 Rootech Inc. All Rights Reserved
Warning
Observe the following instructions or permanent damage to the meter may occur.
Do not apply Accura 3700 to voltages and currents that exceed onput ratings of PT and CT.
Limitation of Liability
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.
Accura EMeter, Accura 2300S/2350, Accura 2500, Accura 3300S/3300, Accura 3500S/3500,
Accura 3550S/3550, Accura 3700, Accura 5500, Accura 7500 are trademarks of Rootech Inc.
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.
.

Accura 3700 User Guide Notice
ⓒ2014 Rootech Inc. All Rights Reserved Page 5
Standard Compliance
CE Approved
EN61326 and IEC61010
MEASURING EQUIPMENT
35DX
E258934
KCC-REM-RTE-ACCURA 3700
KS Q ISO 9001:2009/ ISO 9001:2008
Certificate No: QMS-1347

Revision History Accura 3700 User Guide
Page 6 ⓒ2014 Rootech Inc. All Rights Reserved
Warranty Information
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.
Limitation of Warranty
These limited Warranties shall not apply to any product that has been subject to alteration,
accident, misuse, abuse, neglect or failure to exactly follow Power Measurement's instructions for
operation and maintenance.
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.
Regardless of whether any remedy set forth herein fails of its essential purpose, except to the
extent the following limitation is prohibited by applicable law, Rootech shall not, in any event or
under any legal claim or theory, be liable to the original purchaser or any other person or entity
for special, indirect, incidental, punitive, liquidated, special or consequential damages whatsoever
with respect to any purchased product, including, without limitation, business interruption, loss of
use, profit or revenue, even if Rootech has been advised of the possibility of such damages. To the
extent that a limitation or exclusion of consequential
Damages are prohibited by applicable law, then Rootech’s liability shall be limited to twice the
amount of the relevant purchased product.

Accura 3700 User Guide Warranty Information
ⓒ2014 Rootech Inc. All Rights Reserved Page 7
Rootech shall not be liable for any claim- other 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 rests 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.

Revision History Accura 3700 User Guide
Page 8 ⓒ2014 Rootech Inc. All Rights Reserved
Revision History
The following version of the Accura 3700 User Guide has been released.
Revision
Date
Description
Revision 1.0B 2013. 02. 22 Initial draft
Revision 1.1 2014. 01. 07 First modification
Revision 1.11 2014. 02. 05 AI modification
Revision 1.12 2014. 02. 18 Changed to IEC 61000-4-30, IEC 61000-4-7 Class B

Accura 3700 User Guide Contents
ⓒ2014 Rootech Inc. All Rights Reserved Page 9
Contents
Chapter 1 Introduction .................................................................................................................... 15
Overview ...............................................................................................................................15
Application ............................................................................................................................17
Device Lineup ........................................................................................................................18
Device Lineup ........................................................................................................................19
Chapter 2 Installation...................................................................................................................... 24
Environmental Conditions ..............................................................................................................24
Before Installation..........................................................................................................................25
Meter Overview......................................................................................................................25
Components ..........................................................................................................................28
Dimension .............................................................................................................................29
Step 1: Panel Installation.........................................................................................................31
Step 2: Voltage/Current Wiring ...............................................................................................32
Step 3: Accura 3700 External Communication.........................................................................40
Ethernet Communication ........................................................................................................40
RS485 Communication...........................................................................................................42
Step 4: Accura 3700 Power Supply/Ground.............................................................................43
Power Wiring..........................................................................................................................43
Ground Terminal....................................................................................................................43
Step 5: Accura 3700 Extension Module Addition......................................................................44
Step 6: I/O Module ................................................................................................................45
DIO Module...........................................................................................................................45
DI Module..............................................................................................................................48
DO Module............................................................................................................................50
AI Module..............................................................................................................................52
AO Module............................................................................................................................53
A4D2/A2D4 Module ..............................................................................................................54
RTD Module...........................................................................................................................58
ELD Module ...........................................................................................................................60
DC Module ............................................................................................................................63
Chapter 3 Operation/Setup ............................................................................................................. 67
LED .......................................................................................................................................67
Display Mode ................................................................................................................................71

Contents Accura 3700 User Guide
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Front View..............................................................................................................................71
Display Screen .......................................................................................................................73
Measurement Parameter Display Screen ..................................................................................74
Extension Module State View...................................................................................................79
Display Screen for Classification of Extension Modules .............................................................81
Event Mode ...................................................................................................................................88
Setup Mode...................................................................................................................................96
Setup Menu............................................................................................................................97
METER Setup ..........................................................................................................................98
Event Setup ..........................................................................................................................106
RS485 Communication Setup................................................................................................114
ETHERNET NETWORK SETUP................................................................................................116
RESET ..................................................................................................................................118
Display Setup.......................................................................................................................120
Extension Module ID Setup [MODULE] ..................................................................................123
Separate Extension Module Setup..........................................................................................125
Module Setup Screen............................................................................................................126
DI Module Setup [dI  DI ].....................................................................................................127
DO Module Setup[do  DO ].................................................................................................129
DIO Module Setup [dIo  DIO] ..............................................................................................134
AI Module Setup [AI  AI] .....................................................................................................135
AO Module Setup [Ao  AO] ................................................................................................140
A4D2 Module Setup [MODULE][A4d2  A4D2] .....................................................................143
A2D4 Module Setup [A2d4  A2D4] ......................................................................................144
RTD Module Setup [rtd  RTD] ...............................................................................................145
ELD Module Setup [ELd  ELD]...............................................................................................149
DC Module Setup [dC  DC] .................................................................................................153
Information [INFO  Information] ..........................................................................................163
Required Configuration Step.........................................................................................................164
Accura 3700 Connection, PT Rating ......................................................................................164
APPENDIX A Specification .............................................................................................................. 167
APPENDIX B Standard Compliance ................................................................................................. 169
APPENDIX C Accuracy/Reliability .................................................................................................... 170
Accuracy..............................................................................................................................170
Reliability .............................................................................................................................173
APPENDIX D Ordering Information ................................................................................................. 174

Accura 3700 User Guide Contents
ⓒ2014 Rootech Inc. All Rights Reserved Page 11
INDEX.......................................................................................................................................... 175

Contents Accura 3700 User Guide
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Figure
Fig 2.1 Accura 3700 Front View..............................................................................................25
Fig 2.2 Accura 3700 Side View ...............................................................................................25
Fig 2.3 Accura 3700 Rear View...............................................................................................25
Fig 2.4 Accura 3700 DIO Module...........................................................................................26
Fig 2.5 Accura 3700 DI Module..............................................................................................26
Fig 2.6 Accura 3700 DO Module............................................................................................26
Fig 2.7 Accura 3700 AI Module ..............................................................................................26
Fig 2.8 Accura 3700 AO Module ............................................................................................26
Fig 2.9 Accura 3700 A4D2 Module.........................................................................................26
Fig 2.10 Accura 3700 A2D4 Module.......................................................................................27
Fig 2.11 Accura 3700 RTD Module .........................................................................................27
Fig 2.12 Accura 3700 ELD Module .........................................................................................27
Fig 2.13 Accura 3700 DC Module ..........................................................................................27
Fig 2.14 Accura 3700 Components ........................................................................................28
Fig 2.15 I/O Module Components ..........................................................................................28
Fig 2.16 Accura 3700 Front View............................................................................................29
Fig 2.17 Accura 3700 Rear View.............................................................................................29
Fig 2.18 Accura 3700 Side View .............................................................................................29
Fig 2.19 Accura 3700 I/O Module Front View/Side View/Height...............................................29
Fig 2.20 Accura 3700 Panel Installation[ANSI 4e ...................................................................31
Fig 2.21 Accura 3700 Panel Installation[DIN96] ......................................................................31
Fig 2.22 Voltage/Current Wiring .............................................................................................32
Fig 2.23 3 Phase 4 Wire 3PT, 3CT Wiring, Wiring Mode[CONN] = 3P4U .................................34
Fig 2.24 3 Phase 3 Wire 2PT 3CT Wiring, Wiring Mode[CONN] = 3P3U..................................35
Fig 2.25 3 Phase 3 Wire 2PT, 2CT wiring, Wiring Mode[CONN] = 3P3U..................................35
Fig 2.26 1 Phase 3 Wire 2PT 2CT Wiring, Wiring Mode[CONN] = 1P3U..................................36
Fig 2.27 1 Phase 2 Wire 1PT 1CT Wiring, Wiring Mode[CONN] = 1P2U..................................36
Fig 2.28 3 Phase 4 Wire Direct 3CT Wiring, Wiring Mode[CONN] =3P4U ...............................37
Fig 2.29 3 Phase 3 Wire Voltage Direct 3CT Wiring, Wiring Mode[CONN]=3P3U ....................37
Fig 2.30 3 Phase 3 Wire Voltage Direct 2CT Wiring, Wiring Mode[CONN]=3P3U ....................38
Fig 2.31 1 Phase 3 Wire Voltage Direct 2CT Wiring, Wiring Mode[CONN]=1P3U ....................38
Fig 2.32 1 Phase 3 Wire Voltage Direct 1CT Wiring, Wiring Mode[CONN]=1P2U ....................39
Fig 2.33 Accura 3700 Ethernet Communication Port ................................................................40
Fig 2.34 Accura 3700 Ehternet Connection .............................................................................41

Accura 3700 User Guide Contents
ⓒ2014 Rootech Inc. All Rights Reserved Page 13
Fig 2.35 Accura 3700 RS485 Communication .........................................................................42
Fig 2.36 Accura 3700 RS485 Communication Connection.......................................................42
Fig 2.37 Accura 3700 Power Supply........................................................................................43
Fig 2.38 I/O Module Addition.................................................................................................44
Fig 2.39 DIO Module .............................................................................................................45
Fig 2.40 Digital Input (Dual Input Structure) .............................................................................46
Fig 2.41 DC Relay Application ................................................................................................47
Fig 2.42 AC Relay Application.................................................................................................47
Fig 2.43 DI Module ................................................................................................................48
Fig 2.44 Digital Input (Dual Input Structure) .............................................................................49
Fig 2.45 DO Module ..............................................................................................................50
Fig 2.46 DC Relay application ................................................................................................51
Fig 2.47 AC Relay application.................................................................................................51
Fig 2.48 AI Module ................................................................................................................52
Fig 2.49 Analog Input.............................................................................................................52
Fig 2.50 AO Module ..............................................................................................................53
Fig 2.51 AO Module Analog Output .......................................................................................53
Fig 2.52 A4D2 Module...........................................................................................................54
Fig 2.53 A2D4 Module...........................................................................................................54
Fig 2.54 A4D2/A2D4 Module Analog Output..........................................................................55
Fig 2.55 DC Relay application ................................................................................................56
Fig 2.56 AC Relay application.................................................................................................57
Fig 2.57 RTD Module .............................................................................................................58
Fig 2.58 RTD Input .................................................................................................................59
Fig 2.59 ELD Module..............................................................................................................60
Fig 2.60 ELD Input .................................................................................................................60
Fig 2.61 DC Relay Application ................................................................................................62
Fig 2.62 AC Relay Application.................................................................................................62
Fig 2.63 DC Module...............................................................................................................63
Fig 2.64 DC Voltage/Current..................................................................................................63
Fig 2.65 Digital Input(Dual Input Structure) ..............................................................................64
Fig 2.66 DC Relay application ................................................................................................66
Fig 2.67 AC Relay application.................................................................................................66
Fig 3.1 Accura 3700 Front Side Composition...........................................................................67
Fig 3.2 DISPLAY Mode Screen Example ...................................................................................68
Fig 3.3 SETUP Mode Screen Example ......................................................................................68

Contents Accura 3700 User Guide
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Fig 3.4 Event Mode Screen Example........................................................................................69
Fig 3.5 Accura 3700 Front Side Overview................................................................................71
Fig 3.6 First Screen of Display Mode .......................................................................................74
Fig 3.7 Line to Neutral Voltage/Current/Power Display Screen..................................................74
Fig 3.8 Specific Measured Value Line to Line Voltage Display Screen.........................................75
Fig 3.9 Specific Measured Value of Line to Neutral Current Display Screen................................75
Fig 3.10 Power Specific Measure Value Display Screen.............................................................76
Fig 3.11 Demand Effective Power Specific Measure Value Display Screen..................................76
Fig 3.12 NET Energy Display Screen........................................................................................77
Fig 3.13 Ethernet Connection State Display Screen...................................................................77
Fig 3.14 Temperature Display Screen of ETC............................................................................78
Fig 3.15 First Screen that Displays ID of Extension Module........................................................79
Fig 3.16 Among Module Pages, Screen displaying Channel Information of Extension Module ....79
Fig 3.17 Among Module Pages , Screen that Displays Channel Information of Second Extension
Module..................................................................................................................................80
Fig 3.18 DIO Module First Screen ...........................................................................................82
Fig 3.19 DI Module First Screen ..............................................................................................83
Fig 3.20 DO Module First Screen ............................................................................................83
Fig 3.21 AI Module First Screen...............................................................................................84
Fig 3.22 AO Module First Screen.............................................................................................85
Fig 3.23 A4D2 Module First Screen .........................................................................................85
Fig 3.24 A2D4 Module First Screen .........................................................................................86
Fig 3.25 RTD Module First Screen............................................................................................86
Fig 3.26 ELD Module Primary Screen.......................................................................................86
Fig 3.27 DC Module First Screen.............................................................................................87
Fig 3.28 Dip[Sag] Event Alarm Screen.....................................................................................88
Fig 3.29 Swell Event Alarm Screen ..........................................................................................88
Fig 3.30 Event Log Number Example.......................................................................................90
Fig 3.31 Demand Measuring Method....................................................................................100
Fig 3.32 Power Sign[General Calculation] .............................................................................101
Fig 3.33 Difference between Two Methods that Calculate Each Phase Sum Power....................103
Fig 3.34 Dip Event Configuration[Three Phase 3 Wires]..........................................................109
Fig 3.35 Dip Event Configuration[Three Phase 4 Wires]..........................................................109
Fig 3.36 Swell Event Setup[3P3U]..........................................................................................112
Fig 3.37 Swell Event Setup[3P4U]..........................................................................................112

Accura 3700 User Guide Chapter 1 Introduction
Page 15 ⓒ2013 Rootech Inc. All Rights Reserved
Chapter 1 Introduction
Overview
Advent of the Power Quality Era in Switchgear Panel
Due to the problems of power supply, power facility and branch load, and various power quality
problems such as Dip[Sag]/Swell often generate. Energy management supervisor has to find the
cause of the problems by analyzing power quality in order to make proper preventive or post
measures.
0.2% Reading/IEC62053-22 Class 0.2S Accuracy
Recently, enterprise energy management system establishment is essential for effective energy use
and preventive management to prepare CO2 emission management in plant, factory and
building. The key factor to determine reliability of the energy management is the degree of
measuring accuracy of power meter. Accura 3700 makes 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 is capable of performing 128 high-level sampling/cycle True RMS measurement for
the high nonlinear 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 harmonic], Crest factor, K factor, and unbalance. This makes it possible for
energy management supervisor to easily find the change of power quality in the power facility.
Quality information conforms to IEC61000-4-30 Class B.
Aggregation Interval Maximum/Minimum/Average Information
Accura 3700 provides the average value that corresponds to 0.2 second interval from the
measurement value per cycle unit. Based on 0.2 second interval average value, Accura 3700
provides the average of 1 second, 5 second, 1 minute, 5 minute, 1 hour and 6 hour intervals.
This measurement interval that is longer than 0.2 second means the Aggregation Interval.

Chapter 1 Introduction Accura 3700 User Guide
Page 16 ⓒ2014 Rootech Inc. All Rights Reserved
Accura 3700 provides not only the measuring parameter information, but also statistic
information (maximum, minimum, average) of voltage, current and power by communication.
This includes the information of measuring parameter which often changes. So this makes it
possible to accurate trend-analyzing about voltage, current and power.
CE, UL, KCC, FCC safety and Reliability
The internal/external structure [framework, circuit and fire] of Accura 3700 conforms to standard,
CE[EN61326-1, EN61326-2-1], UL[UL61010-1 2nd edition], KCC[KN22, KN24], FCC[Part15
Subpart B].
Providing Additional Functions by Module Extension Structure on the rear side of meter
Module extension structure easily added to rear side physically can flexibly handle with the
requirement of various additional functions. Module is an option and provides 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 according
to classification. Modules can be added up to 3 modules by non-order and same module addition
is possible. But, the number of repeated addition of AO modules is up to 2.

Accura 3700 User Guide Chapter 1 Introduction
ⓒ2014 Rootech Inc. All Rights Reserved Page 17
Application
High-Reliability Energy Management
Energy Management is specified into various application services such as power quality
management, cost management, demand power management, change in the power facility, and
energy plan with energy management software. The most important thing deciding the data
reliability of energy management is the degree of the accuracy of the digital meter. Accura 3700
measures highly accurate Reading 0.2% about the voltage and current, and power/amount of
power conforms the compliance IEC62053-22 Class 0.2S. This realizes accurate electric energy
management.
Preventive/ Post Measures about Power Facility Operation Management
Accura 3700 provides various functions like energy usage management, power facility
management, power quality management, high efficiency facility analyzing management
Manager of energy can find the cause of the problems by analyzing power quality in order to
make proper preventive or post measures.
Enterprise Energy Management
Accura 3700 is mounted in branch panels in the various power facilities, Accura
2300[2300S/2350 is mounted in branch loads in distribution panel, together provides the
essential energy quality information by total measurement, so this realizes the true enterprise
energy management system.

Chapter 1 Introduction Accura 3700 User Guide
Page 18 ⓒ2014 Rootech Inc. All Rights Reserved
Device Lineup
Accura 3700 is high-accurate power quality meter which has accurate power measurement
functions up to IEC62053-22 Class 0.2S, IEC61000-4-30 Class B Dip/Swell detecting functions,
harmonic analyzing up to 63 harmonics.
Accura 3700 provides various I/O functions which can upgrade the availability. I/O function is
provided by the module structure adding to the rear side of the Accura 3700 and according to the
composition of the I/O channel, various modules are provided. The number of the I/O modules
adding to the Accura 3700 is 3. But, the number of repeated addition of AO modules is up to 2.
Device
Model
Description
Power Quality Meter Accura 3700 Voltage/ Current/Power Measuring
Power Quality Measuring
Ethernet[Star, Daisy chain, and Ring Mode] and RS485
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 I/O Module A4D2 AO 4 channels 3+ DO 2 channels 2
A2D4 AO 2 channels 3+ DO 4 channels 2
Special-purpose Module RTD RTD input 3 channels
PT100, PT1000 Supported
2-Wire, 3-Wire, 4-Wire
ELD Voltage-type ZCT [Zero current transformer]
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
1Temperature sensor which is installed on the rear of Accrua 3700 is not for fire watching, but for reference
only.
2 DO channel support the ON/OFF output [Latch], Pulse, Periodic Pulse and Energy pulse.
3AO channels converts and outputs amount of electricity or value of communication command on 0 ~ 20mA.
.

Accura 3700 User Guide Chapter 1 Introduction
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Device Lineup
Accura 3700 Power Quality Meter
Accura 3700 performs 0.2% Reading accurately about voltage, and current Power/Energy conforms
IEC62053-22 Class 0.2S. Also due to distribution panel digital power metering Accura 3700 provides
various power quality information such as Dip[Sag], Swell, harmonics, Crest factor, K factor, and
unbalance.
Accura 3700
Function
Measuring
Display
Realtime measuring information displayed
on LCD
Analog bar-graph indicated according to
the amount of the measuring
General
Sampling/Cycle 128
Commercial Frequency 50/60Hz
True RMS Measuring Voltage, Current: Reading 0.2%
Frequency 42 ~ 69Hz
Neutral current [In]2
Demand, peak demand, predicted 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 Up to 63 harmonics
Voltage/Current THD4, current TDD5Up to 63 harmonics
Crest factor 6, 2, K factor 7, 2
Dip[Sag], Swell IEC61000-4-30 Class B

Chapter 1 Introduction Accura 3700 User Guide
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Unbalance [Voltage, Current] 2IEC61000-4-30 Class B, NEMA MG1
Vector Diagram 2
Harmonic Analyzing Graph[Voltage,
Current] 2
Oscilloscope 2
Demand Trend 2
Event
Dip[Sag], Swell Event Detecting Half cycle moving 1-cycle RMS Measuring
Digital Input, Analog Input Event Detecting81msec
Number of Event Log Up to 500
Extension Module Addition
Number of IO Modules which can be added to
the rear side of meter Up to 3EA, 2EA(AO)
Temperature
Temperature in the distribution panel 91EA
Communication
Ethernet [100Mbps/Full Duplex, Ethernet
switching 10, RSTP11, Modbus TCP protocol] 2 port[Ethernet1, Ethernet2]
RS485[1,200 ~ 115,200bps, Modbus RTU
protocol] 1 port [Ta, Tb]
General
UL certification UL61010-1 2nd edition
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
1Calculate the expected demand power supposing the power of the moment in demand intervals the same for
the remaining interval.
2Data can be achieved by not displayed on LCD but just by the communication.
3Accura 3700 provides statistic information (maximum, minimum, average) of voltage, current power
through communication. This includes the information of metering parameter which often changes so this
makes it possible to accurate trend-analyzing about voltage, current and power.