ROOTECH Accura 3300S User guide

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.

Standards Compliance

Process Control Equipment

E324900

KCC-REM-RTE-ACCURA3300S

Page 6

Revision History

The following versions of the Accura 3300S User’s Guide have been are released.

Revision #

Revision date

Description

Revision 1.0

2008. 03. 05

Initial draft

Revision 1.1

2009. 11. 27

Voltage input range modified

Revision 1.2

2015. 05. 12

Standard compliance updated

Revision 1.3

2016. 09. 05

Voltage wiring diagram updated

Revision 1.4

2017. 08. 07

IrDA deleted

Revision 1.5

2017. 09. 20

UL Certification code changed

Revision 1.6

2018. 01. 02

Notice, Warranty changed

Revision 1.8

2022.04. 14

Setup items, wiring diagrams,

format and screen images changed

Standard Logo updated,

Page 7

Contents

Chapter 1 Introduction .................................................................................................................... 10

Overview ....................................................................................................................................... 10

Simultaneous Display of Voltage, Current, Power, and Energy ................................................... 10

Integrated Measurements of Various Electrical Parameters ........................................................ 10

Accurate Measurements .......................................................................................................... 10

Power Quality Data Available .................................................................................................. 10

Proven Safety and Reliability with CE/UL Certifications .............................................................. 10

Features ........................................................................................................................................ 11

Measurement ......................................................................................................................... 11

Power Quality ......................................................................................................................... 11

Communication ..................................................................................................................... 11

Power Supply.......................................................................................................................... 11

Applications ................................................................................................................................... 12

True RMS Measurements ......................................................................................................... 12

Power Quality Analysis ............................................................................................................ 12

Ideal for Replacing Analog Meters ........................................................................................... 12

Highly Reliable Energy Management ....................................................................................... 12

Parameters .................................................................................................................................... 13

Chapter 2 Mounting...................................................................................................................... 14

Environmental Conditions ....................................................................................................... 14

Before You Begin ........................................................................................................................... 15

Meter Overview ...................................................................................................................... 15

Meter Dimensions .................................................................................................................. 16

Step 1: Panel Mounting ................................................................................................................ 17

Sequence ............................................................................................................................... 17

Step 2: Voltage and Current Inputs ............................................................................................... 18

Voltage Input .......................................................................................................................... 18

Current Input ......................................................................................................................... 19

Wiring Diagram Using External PTs ......................................................................................... 20

Direct Connection Diagram Using No PTs ................................................................................ 23

Step 3: Wiring the Device for RS485 Communication ...................................................................... 26

Step 4: Wiring the Power Supply and Ground Terminal .................................................................... 27

Power Supply.......................................................................................................................... 27

Page 8

Ground Terminal .................................................................................................................... 27

Step 5: Adding the Cover/Powering Up the Meter ......................................................................... 28

Adding the Cover ................................................................................................................... 28

Powering Up the Meter ........................................................................................................... 28

Chapter 3 Meter Operation/Setup .................................................................................................. 29

Display Mode ................................................................................................................................ 30

Setup Mode ................................................................................................................................... 36

Reset Mode .................................................................................................................................... 38

System Mode ................................................................................................................................. 39

Reactive Power Calculation ..................................................................................................... 41

Appendix A Specifications ................................................................................................................ 43

Appendix B Standard Compliance .................................................................................................. 44

Appendix C Test Report .................................................................................................................. 45

Measuring Test ............................................................................................................................... 45

Reliability Test ................................................................................................................................ 46

Page  9 
 
Figures 
 
Fig 1.1 Front Side ................................................................................................................... 15 
Fig 1.2 Rear Side .................................................................................................................... 15 
Fig 1.3 Front View .................................................................................................................. 16 
Fig 1.4 Rear View ................................................................................................................... 16 
Fig 1.5 Side View ................................................................................................................... 16 
Fig 1.6 ANSI 4” ...................................................................................................................... 17 
Fig 1.7 DIN96 ........................................................................................................................ 17 
Fig 1.8 Voltage and Current Connector ................................................................................... 18 
Fig 1.9 Single Phase 2 Wires, Wiring Mode = 1P2U ................................................................ 20 
Fig 1.10 Three Phase 3 Wire Open Delta Using 2CTs, Wiring Mode = 3P3O ............................ 21 
Fig 1.11 Three Phase 3 Wire Open Delta Using 3CTs, Wiring Mode = 3P3O ............................ 21 
Fig 1.12 Three Phase 4 Wires Using 3 PTs and 3 CTs, Wiring Mode = 3P4U ............................. 22 
Fig 1.13 Single Phase 2 Wire Direct , Wiring Mode = 1P2U ..................................................... 23 
Fig 1.14 Single Phase 3 Wire Direct Using 2 CTs, Wiring Mode = 1P3U ................................... 24 
Fig 1.15 Three Phase 3 Wire Open Delta Direct, Wiring Mode = 3P3O .................................... 24 
Fig 1.16 Three Phase 3 Wire Open Delta Direct Using 3 CTs, Wiring Mode = 3P3O ................. 25 
Fig 1.17 Three Phase 4 Wire Direct Using 3 CTs, Wiring Mode = 3P4U .................................... 25 
Fig 1.18 Communication Wiring ............................................................................................. 26 
Fig 1.19 Wiring of Power Supply and Ground Terminal ............................................................ 27 
Fig 1.20 Cover ....................................................................................................................... 28 
Fig 2.1 Measurement Group A, B ............................................................................................ 30 
Fig 2.2 Measurement Group C ............................................................................................... 30 
Fig 2.3 Measurement Group D ............................................................................................... 30 
Fig 2.4 x1000, x10 LED .......................................................................................................... 31 
Fig 2.5 P, Q[according to general calculation] .......................................................................... 41 
 

Page 10

Chapter 1 Introduction

Overview

Simultaneous Display of Voltage, Current, Power, and Energy

Unlike Accura 3300 which only displays the values measured on three phases for a selected

parameter, Accura 3300S simultaneously displays data on major measurement parameters,

including voltage, current, power, energy, power factor, and frequency on the screen.

Integrated Measurements of Various Electrical Parameters

Accura 3300S 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 3300S 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 3300S provides power quality data such as voltage/current THD, harmonics, and K-Factor.

Proven Safety and Reliability with CE/UL Certifications

The internal and external structures, including the design of the product and circuit of Accura

3300S meet safety requirements for CE(IEC 61010) and UL(UL 61010-2, 2nd edition) standards.

The busbar provided with the product allows for easier wiring of CTs when installing the product.

Page 11

Features

Measurement

◼ 64 samples/cycle, True RMS

◼ IEC 62053-22 Class 0.5S

◼ 50, 60Hz

◼ Energy stored periodically to non-volatile memory.

◼ 4 Quadrant Energy

kWh/kVARh received1, kWh/kVARh delivered1

kWh/kVARh net[kWh/kVARh received - kWh/kVARh delivered]

kWh/kVARh total[kWh/kVARh received + kWh/kVARh delivered]

◼ Phase voltage, line to line voltage, current

◼ Active power, reactive power, active energy, reactive energy†, power factor, frequency

◼ Fundamental component†, True RMS of current

◼ 4 Quadrant Power

◼ Demand, peak demand

◼ Maximum, Minimum†

1kWh/kVARh received is positive for “view as load”, kWh/kVARh

delivered is positive for “view as generator”.

Power Quality

◼ Voltage/current THD

◼ Harmonic Analysis†

◼ K factor†

†It is available only via RS485 communication.

Communication

◼ RS485 Port[rear]

Modbus RTU Protocol

Baud rate: 1,200 ~ 57,600bps

Power Supply

◼ AC 85 ~ 265V, 50/60Hz

◼ DC 100 ~ 300V

◼ Burden: 10VA

Page 12

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 3300S performs

true RMS measurements for voltage and current waveforms distorted due to harmonics.

Power Quality Analysis

Accura 3300S 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 3300S meets both ANSI 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 3300S 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 3300S 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.

Page 13

Parameters

Item

Realtime1

Average2

Total3

Maximum4

Minimum5

Phase voltage

■

■†

Line to line voltage

■

■†

Current

■

Power

Active

■

Reactive

■†

■

■†

Apparent

■†

Energy6

Active

■

Reactive

■†

Apparent

■†

Frequency

■

Power factor

■†

■

THD

Voltage

■

Current

■

Demand

Power

■

Current

■

1 Instantaneous 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.)

6Energy values are periodically stored to non-volatile memory.

Note

The Maximums and minimums will not be updated with no power-up.

Measurement data are not shown for 5 seconds after power-up.

Page 14

Chapter 2 Mounting

Environmental Conditions

The Accura 3300S should be mounted in a dry, dirt free location away from heat sources and very

high electric fields. To operate properly and effectively, environmental conditions should range

within the following guidelines

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.

Page 15

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 Side

Fig 1.2 Rear Side

Page 16

Meter Dimensions

Fig 1.3 Front View

Fig 1.4 Rear View

Fig 1.5 Side View

Page 17

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.

Page 18

Step 2: 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 19

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 IEC 61010-1 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.

Page 20

Wiring Diagram Using External PTs

Caution

Failure to observe the following wiring diagrams may result in severe injury or death. Be sure to

use shorting block when connecting the meter to CT secondaries.

Fig 1.9 Single Phase 2 Wire Connection, Wiring Mode = 1P2U

Caution

In single phase 2 wire mode, be sure to use V1, VN, 1S, 1L terminals as the above.

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ROOTECH Accura 3300S User guide

ROOTECH Accura 3300S User guide

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