ROOTECH Accura 3300 User manual

Energy Solution for
Human & Nature

Page 2
Notice
Symbols
Caution
Indicates the presence of dangerous voltage which can cause severe injury or death
to persons 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.
◼During normal operation of the product, hazardous voltages are present on the terminals that
connect PT/CT, digital inputs, power, and external I/O circuits. The PT/CT secondary can
produce lethal voltage or current caused by the energy of the primary.
◼Standard safety precautions should be followed during the installation and maintenance of the
product, including removing PT fuses and shorting CT secondaries.
◼Install the product in enclosures or a similar cabinet to prevent access to the terminal strips of
the product after wiring.

Page 3
Caution
Observe the following instructions, or it may cause permanent damage to the product.
◼Do not apply voltages and currents that exceed the input ratings of the PT and CT to the
product.
◼Using the device for other purposes not specified by the manufacturer can cause severe
damage to the product.
◼Connect the chassis ground terminal of the product to the earth ground to protect the device
from noise and surge. Failure to properly connect the chassis ground will void the warranty of
the product.
About the Manual
Rootech, Inc. reserves the right to make changes in the product specifications shown in this User
Guide without prior notice. We recommend that customers should obtain the latest information on
product specifications and the manual before making orders.
In the absence of written agreements, Rootech, Inc. assumes no liability for applications assistance,
customer’s system design, or infringement of patents or copyrights induced by third parties arising
from the use of the products described herein.
We endeavor to provide accurate information in the document. However, we are not responsible
for any errors which may appear here and reserves the right to make changes without prior 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.

Page 4
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 coming from when transporting or storing the product
◼Damages caused by the force majeure event, including fire, flood, earthquakes, storm
damage, overvoltage & lightning

Page 5
◼If the original identification marks(trade-mark, serial number, etc.) have been defaced, altered,
or removed
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 with system design provided by Rootech's personnel or representatives
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 the product and
associated documentation. The original purchaser should acknowledge that 100% up time is not
realizable because of possible hardware or software defects. The original purchaser should
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.

Page 6
Standards Compliance
Process Control Equipment
E324900
KCC-REM-RTE-ACCURA3300

Page 7
Revision History
The following versions of the Accura 3300 User’s Guide have been are released.
Revision
Revision date
Description
Revision 1.0
2006. 06. 30
Initial release
Revision 1.1
2007. 07. 13
Mounting method modified
Revision 1.2
2012. 05. 21
Voltage input range modified
Revision 1.3
2015. 05. 12
Standard compliance updated
Revision 1.4
2016. 09. 05
Voltage wiring diagram updated
Revision 1.5
2017. 08. 07
IrDA deleted
Revision 1.6
2017. 08. 20
UL Certification code changed
Revision 1.7
2018. 01. 02
Notice, Warranty changed
Revision 2.0
2022. 04. 14
Standard logo updated
Setup items changed, wiring diagrams
changed

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Contents
Chapter 1 Introduction .................................................................................................................... 11
Overview.......................................................................................................................................11
Integrated Measurements of Various Electrical Parameters ........................................................11
Accurate Measurements..........................................................................................................11
Power Quality Data Available..................................................................................................11
Proven Safety and Reliability with CE/UL Certifications..............................................................11
Features ........................................................................................................................................12
Measurement.................................................................................................................................12
Power quality..........................................................................................................................12
1. For the load side, Received/Delivered energy values are provided as positive values..............12
2. The data are available only via RS-485 communication. ......................................................12
Applications...................................................................................................................................13
True RMS Measurements.........................................................................................................13
Power Quality Analysis............................................................................................................13
Ideal for Replacing Analog Meters...........................................................................................13
Highly Reliable Energy Management .......................................................................................13
Parameters ....................................................................................................................................14
Item............................................................................................................................................... 14
Chapter 2 Mounting...................................................................................................................... 15
Installation Conditions ............................................................................................................15
Environmental Conditions.......................................................................................................15
Before You Begin ...........................................................................................................................16
Meter Overview......................................................................................................................16
Meter Dimensions ..................................................................................................................17
Step 1: Panel Mounting................................................................................................................18
Sequence...............................................................................................................................18
Step 2: Wiring Voltage and Current Inputs ....................................................................................19
Voltage Input..........................................................................................................................19
Current Input .........................................................................................................................20
Wiring Diagram Using External PTs .........................................................................................21
Direct Connection Diagram Using No PTs................................................................................24
Step 3: Wiring the Device for RS485 Communication ......................................................................27
Step 4: Wiring the Power Supply and Ground Terminal ....................................................................28

Page 9
Power Supply..........................................................................................................................28
Ground Terminal....................................................................................................................28
Step 5: Adding the Cover/Powering Up the Meter .........................................................................30
Adding the Cover...................................................................................................................30
Powering Up the Meter ...........................................................................................................30
Chapter 3 Meter Operation/Setup .................................................................................................. 31
Display Mode ................................................................................................................................32
Setup Mode...................................................................................................................................35
Reset Mode....................................................................................................................................37
System Mode.................................................................................................................................38
Reactive Power Calculation .....................................................................................................40
Appendix A Specifications ................................................................................................................ 42
Appendix B Standard Compliance .................................................................................................. 43
Appendix C Test Report.................................................................................................................. 44
Measuring Test...............................................................................................................................44
Reliability Test ................................................................................................................................45

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Figures
Fig 1.1 Front View ..................................................................................................................16
Fig 1.2 Rear View ...................................................................................................................16
Fig 1.3 Front View ..................................................................................................................17
Fig 1.4 Rear View ...................................................................................................................17
Fig 1.5 Side View ...................................................................................................................17
Fig 1.6 ANSI 4”......................................................................................................................18
Fig 1.7 DIN96........................................................................................................................18
Fig 1.8 Voltage and Current Connector...................................................................................19
Fig 1.9 Single-phase 2-wire Connection, Wiring Mode = 1P2U................................................21
Fig 1.10 Three-phase 3-wire Open Delta Connection Using 2 CTs, Wiring Mode = 3P3O.........22
Fig 1.11 Three-phase 3-Wire Open Delta Connection Using 3 CTs, Wiring Mode = 3P3O ........22
Fig 1.12 Three Phase 4 Wire Connection Using 3 PTs and 3 CTs, Wiring Mode = 3P4U ............23
Fig 1.13 Single-phase 2-wire Direct Connection, Wiring Mode = 1P2U ....................................24
Fig 1.14 Single-phase 3-wire Direct Connection Using 2 CTs, Wiring Mode = 1P3U .................25
Fig 1.15 Three-phase 3-Wire Open Delta Direct Connection, Wiring Mode = 3P3O .................25
Fig 1.16 Three-phase 3-Wire Open Delta Direct Connection Using 3 CTs .................................26
Wiring Mode = 3P3O ............................................................................................................26
Fig 1.17 Three Phase 4 Wire Direct Connection Using 3 CTs, Wiring Mode = 3P4U ..................26
Fig 1.18 Communication Wiring .............................................................................................27
Fig 1.19 Wiring of Power Supply and Ground Terminal ............................................................28
Fig 1.20 Adding the Cover......................................................................................................30
Fig 2.1 Measurement Groups .................................................................................................32
Fig 2.2 P, Q[according to general calculation]..........................................................................40

Page 11
Chapter 1 Introduction
Overview
Integrated Measurements of Various Electrical Parameters
Accura 3300 is a high accuracy digital power meter tailored for reliable measurements and
accurate analysis of power consumption. Installed in factories, power and generator panels in
buildings, etc, the device performs integrated measurements of various power parameters,
including voltage, current, power, frequency, and power factor.
Accurate Measurements
Measurement accuracy is a key factor that determines the reliability of energy management
systems. Low measurement accuracy causes inconsistency between the energy of the incoming
feeder and the sum of energy measured on the load side. It makes it difficult to perform reliable
energy management. Accura 3300 provides highly accurate measurements of voltage and
current(±0.2% of reading) and meets IEC 62053-22 class 0.5S for power and energy
measurements. It helps to address problems caused by measurement errors and allows for
efficient energy management.
Power Quality Data Available
Accura 3300 provides the information of power qualities, such as voltage/current THD, harmonic
analysis, and k factor.
Proven Safety and Reliability with CE/UL Certifications
Accura 3300’s internal and external structures(the product and circuit design) meet safety
requirements for CE(IEC 61010) and UL(UL 61010-2, 2nd edition) standards. A busbar is
provided with the product for easier wiring of CTs when installing the product. The busbar
minimizes fire hazards by ensuring safety under an overcurrent condition.

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Features
Measurement
64 samples/cycle, True RMS
IEC 62053-22 Class 0.5S
50, 60 Hz
Energy
Received energy, Delivered energy1
Net energy(Received energy - Delivered energy)
Total(Sum) energy(Received energy + Delivered energy)
Line to neutral voltage, line to line voltage, current
Power, energy, power factor, frequency
Fundamental component/true RMS value of current
4 quadrant power
Demand, peak demand, predicted demand
Maximum/minimum value
Power quality
Voltage/current THD
Harmonic analysis 2,
K-Factor 2
Communication
RS-485 port
Modbus RTU protocol
(located at the back of the device)
Baud rate : 1,200 - 57,600 bps
Power supply
AC 85 - 265 V, 50/60 Hz
DC 100 - 300 V
Power consumption: 10 VA
1. For the load side, Received/Delivered energy values are provided as positive values.
2. The data are available only via RS-485 communication.

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Applications
True RMS Measurements
Nonlinear loads mainly used in the field include rectifiers and electric furnaces and cause
harmonics that involve severe voltage and current waveform distortion. Accura 3300 performs true
RMS measurements for voltage and current waveforms distorted due to harmonics.
Power Quality Analysis
Accura 3300 provides data on voltage and current THD and K-Factor and allows for the analysis
of voltage and current harmonics up to the 31st order. It allows for effective analysis of power
quality by providing real time data on voltage and current waveforms.
Ideal for Replacing Analog Meters
Accura 3300 meets both NSI C39.1(4" Round) and DIN 96 standards for installation. It features
the installation dimensions same as those of analog meters. Thus, there is no need to create
cutouts on the panel when installing Accura 3300 in the existing switchgear panels. It makes it
easy to replace analog meters with digital meters.
Highly Reliable Energy Management
Energy management include monitoring energy consumption, managing energy costs and energy
demand,replacing energy facilities, and performing energy planning. In this regard, measurement
accuracy is a key factor that determines the reliability of energy management systems. Accura
3300 provides highly accurate measurements of voltage and current (±0.2% of reading) and
meets IEC 62053-22 class 0.5S for power and energy measurements. It allows for efficient energy
management through accurate measurements.

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Parameters
Item
Realtime1
Average2
Total3
Maximum4
Minimum5
Predicted 7
Phase voltage
■
■
■
■
Line to line voltage
■
■
■
■
Current
■
■
■
Power
Active
■
■
■
Reactive
■
■
■
Apparent
■
■
■
Energy 6
Active
■
Reactive
■
Apparent
■
Frequency
■
Power factor
■
■
THD
Voltage
■
Current
■
Demand
Power
■
■
■
Current
■
■
■
1Instantaneous value of each parameter 2Average value of three phase parameters. 3Total value of three
phase parameters.
4If a real-time value is greater than the maximum value, the maximum value is updated.(The value measured
within 10 msec after power up is ignored.)
5If a real-time value is smaller than the minimum value, the minimum value is updated. (The value measured
within 10 msec after power up is ignored.)
6 The predicted demand value is calculated based on the accumulated value.
Note
The Maximums and minimums will not be updated with no power-up.

Page 15
Chapter 2 Mounting
Installation Conditions
The Accura 3300 should be mounted in a dry, dirt free location away from heat sources and high
electric fields. To operate the product properly and effectively, the environmental conditions below
should be considered.
Environmental Conditions
Description
Installation location
Indoors
Operating Temp
-20 to 70C[-4 to 158℉]
Storage Temp
-40 to 85C[-40 to 185℉]
Operating Humidity
5 - 95% (non-condensing)
Caution
The meter should be installed in a switchgear cabinet or similar enclosure to ensure the terminal
strips on the meter base are not user accessible after installation.
Mount the meter in a dry location free from dirt and corrosive vapors. Once installed, no cleaning
of the device is necessary.

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Before You Begin
Before installing the meter, observe the instructions in this guide and read the safety precautions
presented on the “Installation Considerations”page.
Caution
Power up after the voltage and current wiring is completed.
Meter Overview
Fig 1.1 Front View
Fig 1.2 Rear View

Page 17
Meter Dimensions
Fig 1.3 Front View
Fig 1.4 Rear View
Fig 1.5 Side View

Page 18
Step 1: Panel Mounting
Sequence
1. Remove connector on the bottom of the meter.
2. Fit the meter into cutout[ANSI 4”or DIN96].
3. Fix the meter onto the panel by turning the mounting nut. When conforming to the
DIN96 standard, there is no need to drill holes on the panel.
Fig 1.6 ANSI 4”
Fig 1.7 DIN96
Note
The meter is mounted on switchgear boards (metal cabinet) in electrical facilities.

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Step 2: Wiring Voltage and Current Inputs
Fig 1.8 Voltage and Current Connector
Voltage Input
Item
Description
Pin name
V1, V2, V3, Vn
Connector
Terminal block
Wire
2.1 to 3.5 mm2[ 14 to 12 AWG]
Rating1
0 - 600V 3 - L-L[Line to line], 0 - 457V 3 - L-N[Line to neutral]
Burden
0.02VA/phase @220V
Impedance
3MΩ/phase
Compliance
Pollution degree 2, Installation Category Ⅲ
Caution
In three phase 3 wire open delta direct connection mode, line to line voltage should not exceed
457V because the voltage is applied to the inputs of phase voltage.
PT[Potential Transformer]
PTs are required for all systems with voltage levels greater than these above. The meter inputs can
be used with PTs that have secondaries rated between AC 0V and 457V. PTs should comply with
IEC 61010-1 2nd Edition, Pollution Degree 2, Overvoltage Category Ⅲ.
Caution
In case where PTs are required, fuses should be installed on the secondary of the PTs.

Page 20
Current Input
Item
Description
Pin name
1S, 2S, 3S, 1L, 2L, 3L
Connector
Terminal block[Busbar]
Wire
2.1 to 6 mm2[ 14 to 10 AWG]
Ratings
5A nominal/ 10A full scale 3 -
Burden
Maximum 0.005A/phase @10A
Compliance
Pollution degree 2, Installation Category Ⅲ
CT[Current Transformer]
Item
Description
Compliance
UL61010-1; and IEC61010-1 2nd Edition, Pollution Degree 2,
Overvoltage Category Ⅲ
Primary CT1
Equal to current rating of the power feed protection device.
Secondary CT Burden
> 3VA
1 If the predicted peak load is considerably less than the rated system capacity, you can improve
accuracy and resolution by selecting a lower rated CT.