ROOTECH ACCURA 3550 User Manual

High accurary digital power meter with dc modules for use with rectifiers

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Page 1 ––...
Page 2 Digital Power Meter Accura 3550 Front Accura 3550 Rear IO Modules Accura 3550IO-DC Accura 3550IO-AI Accura 3550IO-RTD Accura 3550IO-DIO Accura 3550IO-AO Accura 3550IO-ELD Accura 3550IO-DI Accura 3550IO-A4D2 Accura 3550IO-TEMP Accura 3550IO-DO Accura 3550IO-A2D4 Accura TSEN/THSEN...
Page 3: Installation Considerations
Always power the device with the correct rated voltage. ◼ Install the device in a suitable electrical cabinet by following recommended installation instructions. ◼ Failure to take these precautions could cause serious injuries or death. ⓒ 2006 Rootech Inc. All Rights Reserved Page 3...
Page 4: About The Manual
◼ About the Manual Rootech Inc. reserves the right to make changes in the device specifications shown in this User Guide without notice. Therefore, we recommend that customers should check the latest information on specifications of the device before making orders.
Page 5: Limitation Of Warranty
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.
Page 6: Standards Compliance
Warranty Accura 3550 User Guide 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.
Page 7: Revision History
Accura 3550 User Guide Revision History Revision History The revision history of Accura 3550 User Guide is as follows. Revision Date Description Revision 2.00 February 29, 2024 First release Revision 2.01 October 24, 2024 Updated the specific measurement parameters supported by the device...
Page 8: Table Of Contents
Step 3: Power Supply/Ground Connection ......................39 Power Supply Connection ..................................39 Ground Connection ....................................39 Step 4: Connections of Accura 3550 Devices for External communication ............40 Ethernet Communication ..................................40 RS-485 Communication ..................................42 Step 5: Attachment of Accura 3550 IO Modules ....................43 Step 6: Connections of 3550 IO Modules .......................
Page 9 Information Display ....................................97 Setup for Individual IO Modules ................................ 99 Event Mode ................................122 Event Notifications ....................................122 Clearing Event Notifications ................................122 Button Operation..................................... 123 Event Log Number ....................................124 ⓒ 2006 Rootech Inc. All Rights Reserved Page 9...
Page 10 Aggregation ................................157 Collection of Aggregation Data ............................... 158 Appendix A Specifications ............................. 159 General Specifications ................................... 159 Accura 3550 Digital Power Meter ..............................159 Accura 3550 IO Modules ..................................163 Page 10 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 11 IEC 62053-22:2020 Static Meters for AC Active Energy (Class 0.2S) ................171 IEC 62053-24:2020 Static Meters for Fundamental Reactive Energy (Class 0.5S) ............ 171 Appendix C Accuracy/Reliability ........................... 172 Accuracy ........................................172 Reliability ........................................173 Appendix D Ordering Information ..........................174 ⓒ 2006 Rootech Inc. All Rights Reserved Page 11...
Page 12 Fig 2.22 TEMP Module Front/Side/Height ............................29 Fig 2.23 Accura TSEN/THSEN ................................29 Fig 2.24 Mounting Accura 3550 on the Panel (ANSI 4”) ......................30 Fig 2.25 Mounting Accura 3550 on the Panel (DIN 96”) ......................30 Fig 2.26 Voltage/Current Input Wiring .............................. 31 Fig 2.27 3P4W Connection with 3 PTs and 3 CTs ........................
Page 13 Fig 2.39 Ethernet Connection between Accura 3550 Devices ....................41 Fig 2.40 RS-485 Communication of Accura 3550 ........................42 Fig 2.41 Connection of Accura 3550 Devices via RS-485 Communication ..............42 Fig 2.42 Attaching IO Modules ................................43 Fig 2.43 DC Module ....................................45 Fig 2.44 DC Voltage/Current ..................................
Page 14 Fig 4.20 Analog Output Current Converted from Power Factor ..................155 Fig 4.21 Aggregation Process for Avg/Max/Min Values ......................157 Fig 4.22 Aggregation Process for the Last Latched Values ....................157 Page 14 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 15: Chapter 1 Introduction
Gapless Measurements of Voltage and Current: Max/Min/Avg Values Available Within Aggregation Intervals Accura 3550 provides the average value of the data obtained over the 0.2-second interval based on the values measured over 1 cycle. Based on the average value for the 0.2-second interval, it provides average values for 1-second, 5-second, 1-minute, 5-minute, 1-hour, 6-hour and 1-day intervals.
Page 16 Various IO Modules Easily Attachable to the Meter Accura 3550 allows you to easily connect IO expansion modules to the back of the device, providing a range of additional functions to better suit your needs in the field. It is optional to use IO modules, including the DC module for the DC voltage and current measurement of rectifier panels.
Page 17: Product Information
1. The voltage-type ZCT is not included in the product package. Thus, you should separately purchase it from a ZCT manufacturer. 2. The communication cables used to connect the TEMP module to Accura TSEN/THSEN devices are not provided. ⓒ 2006 Rootech Inc. All Rights Reserved Page 17...
Page 18: Fig 2.4 Dc Module
Chapter 1 Introduction Accura 3550 User Guide The abbreviated names of Accura 3550 products are shown in the table below. Abbreviated Product Names Full Product Names A3550 Accura 3550 DC Module Accura 3550IO-DC DIO Module Accura 3550IO-DIO DI Module Accura 3550IO-DI...
Page 19: Product Features
Accura 3550 enables accurate analysis and diagnosis of various problems in energy management at power facilities. The IO modules which can be easily attached to the back of Accura 3550 can also allow users to meet the demands for various additional functions in the field.
Page 20 3. For specific measurement parameters including energy, demand, and IO modules’ digital input and output data, the device provides the data measured for the last 0.2 seconds by latching the data. 4. The built-in Ethernet switch allows for Ethernet connection between Accura 3550 devices without a separate external switch.
Page 21 Accura 3550 IO Modules Accura 3550 allows you to easily connect IO expansion modules to the back of the device, providing a range of additional functions to better suit your needs in the field. It is optional to use IO modules, including the DC module for the DC voltage and current measurements of rectifier panels.
Page 22 1. DO channels support latches, pulses and energy pulses. 2. The values measured by Accura 3550 or the command values provided via communication are converted into values between 0 and 20 mA or 4 and 20 mA to output analog signals.
Page 23: Chapter 2 Installation
You should apply power to the device after voltage and current wiring is completed. Conditions for Installation Accura 3550 should be installed at locations that are not directly affected by high temperatures and high electric fields. To operate the product properly, you should install it under the following environmental conditions.
Page 24: Product Appearance
Chapter 2 Installation Accura 3550 User Guide Product Appearance Fig 2.1 Accura 3550 Front Fig 2.2 Accura 3550 Side Fig 2.3 Accura 3550 Rear Page 24 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 25: Fig 2.6 Di Module
Accura 3550 User Guide Chapter 2 Installation Fig 2.4 DC Module Fig 2.5 DIO Module Fig 2.6 DI Module Fig 2.7 DO Module Fig 2.8 AI Module Fig 2.9 AO Module ⓒ 2006 Rootech Inc. All Rights Reserved Page 25...
Page 26: Fig 2.10 A4D2 Module
Chapter 2 Installation Accura 3550 User Guide Fig 2.10 A4D2 Module Fig 2.11 A2D4 Module Fig 2.12 RTD Module Fig 2.13 ELD Module Fig 2.14 TEMP Module Fig 2.15 Accura TSEN/THSEN Page 26 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 27: Components
Fig 2.16 Accura 3550 Components Accura 3550 Mounting wheel Protection Two screws for Connector Short bar cover the protection cover Fig 2.17 Accura 3550 IO Module Components Accura 3550 IO module ⓒ 2006 Rootech Inc. All Rights Reserved Page 27...
Page 28: Dimensions
Chapter 2 Installation Accura 3550 User Guide Dimensions Fig 2.18 Accura 3550 Front Fig 2.19 Accura 3550 Side Fig 2.20 Accura 3550 Rear Fig 2.21 IO Module Front/Side/Height (Excluding the TEMP Module) Page 28 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 29: Fig 2.5 Dio Module
DIO module DI module DO module AI module AO module A4D2 module A2D4 module RTD module ELD module TEMP module 86.2 91.0 27.0 100 g Accura TSEN/THSEN 32.0 107.8 27.5 75 g ⓒ 2006 Rootech Inc. All Rights Reserved Page 29...
Page 30: Step 1: Installation
Step 1: Installation Mounting Accura 3550 on the Panel Accura 3550 is mounted at the front of the distribution panel. ① Fit the meter into the cutout of the panel. (ANSI 4“ and DIN 96” cutout supported) ② Attach the mounting wheel to the back of the meter.
Page 31: Step 2: Voltage/Current Wiring
Transformer) should be used when measured voltages are greater than the specified input voltage range. Caution In case of using the external PT, a fuse should be installed at the PT secondary. ⓒ 2006 Rootech Inc. All Rights Reserved Page 31...
Page 32: Current Input
1 A nominal/2 A A full scale Accura 3550-1A Burden 0.01 VA/phase @10 A 1 %In – 200 %In Accura 3550-5A, In = 5 A Measuring range (accuracy guaranteed) 5 %In – 200 %In Accura 3550-1A, In = 1 A...
Page 33: Wiring Diagrams Using External Pts
Navigate to the menu options 「SETUP > Conn」 and select 「3P4U)」. Fig 2.28 3P3W Connection with 2 PTs and 3 CTs Note Navigate to the menu options 「SETUP > Conn」 and select 「3P3U)」. ⓒ 2006 Rootech Inc. All Rights Reserved Page 33...
Page 34: Fig 2.29 3P3W Connection With 2 Pts And 2 Cts
The L1 and L2 voltages should be connected to the V and V ports, and the N line should be connected to the V port. Navigate to the menu options 「SETUP > Conn」 and select 「1P3U」. Page 34 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 35: Fig 2.31 1P2W Connection With 1 Pt And 1 Ct
The L1 voltage should be connected to the V port, and the N line should be connected to the V port. Navigate to the menu options 「SETUP > Conn」 and select 「1P2U」. ⓒ 2006 Rootech Inc. All Rights Reserved Page 35...
Page 36: Wiring Diagrams Without Using External Pts
Navigate to the menu options 「SETUP > Conn」 and select 「3P4U」. Fig 2.33 3P3W Direct Connection with 3 CTs Note Navigate to the menu options 「SETUP > Conn」 and select 「3P3U」. Page 36 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 37: Fig 2.34 3P3W Direct Connection With 2 Cts
The L1 and L2 voltages should be connected to the V and V ports, and the N line should be connected to the V port. Navigate to the menu options 「SETUP > Conn」 and select 「1P3U)」. ⓒ 2006 Rootech Inc. All Rights Reserved Page 37...
Page 38: Fig 2.36 1P2W Direct Connection With 1 Ct
The L1 voltage should be connected to the V port, and the N line should be connected to the V port. Navigate to the menu options 「SETUP > Conn」 and select 「1P2U」. Page 38 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 39: Step 3: Power Supply/Ground Connection
2. The device conforms to UL standards for the tested AC power supply voltage. 3. It indicates the maximum power consumption of the Accura 3550 and its IO modules. 4. When installing fuses on the power line, it is recommended to use fuses that are UL-listed with an RK5 class or higher and are rated at 2 A/500 V.
Page 40: Step 4: Connections Of Accura 3550 Devices For External Communication
Its built-in Ethernet switches enables you to connect Accura 3550 devices using its two Ethernet ports without the need for an additional external switch. Up to 20 Accura 3550 devices can be connected in a star, daisy-chain or ring topology. The device supports Modbus TCP, one of the standard protocols for transmission of measurement data.
Page 41: Fig 2.39 Ethernet Connection Between Accura 3550 Devices
Note Accura 3550 provides a lower bridge priority value of 49152(C000h) instead of a default bridge priority value of 32768(8000h). If the bridge priority value of a switch is configured as 32768(8000h), the switch has a higher priority over Accura 3550.
Page 42: Rs-485 Communication
1. At 115,200 bps, a master can communicate with up to 16 slave devices, and the maximum distance between the master and the slave is 600 m. Fig 2.41 Connection of Accura 3550 Devices via RS-485 Communication * To minimize noise caused by ground loops, a shielded cable should be grounded at only one end as shown in the figure.
Page 43: Step 5: Attachment Of Accura 3550 Io Modules
Accura 3550 User Guide Chapter 2 Installation Step 5: Attachment of Accura 3550 IO Modules Connect IO modules to Accura 3550 after removing the protection cover attached to the back of the device. Fig 2.42 Attaching IO Modules Note Up to two IO modules can be connected regardless of the module type and connection order. However, if you use the Modbus map for the device released before its renewal, the IO module connectable to the device is limited only to the DC module.
Page 44: Step 6: Connections Of 3550 Io Modules
(24 – 12 AWG) / max. 0.51 Nm (5.2 kgf-cm, 4.5 Ibf-in) Output type DC current 4 – 20 mA / 0 – 20 mA Allowable load resistance No more than 450 Ω Accuracy ±0.5 % Full scale Full scale: 20 mA Page 44 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 45: Dc Module
(24 – 12 AWG) / max. 0.51 Nm (5.2 kgf-cm, 4.5 Ibf-in) DC Shunt resistance Max. 100 mV Full scale: 100 mV DC voltage Max. 200 V Full scale: 200 V Accuracy ±0.5 % Full scale Fig 2.44 DC Voltage/Current ⓒ 2006 Rootech Inc. All Rights Reserved Page 45...
Page 46: Digital Input Channels
The digital outputs of the DC module and the DIO module operate in the same way. Thus, refer to the description of the DIO module for the operation of DO channels. Page 46 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 47: Dio Module
8 channels. Fig 2.46 Digital Inputs (Redundant Input Structure) Caution Applying external power to the digital input port causes damage to the meter because it has 24 V input voltage internally. ⓒ 2006 Rootech Inc. All Rights Reserved Page 47...
Page 48: Digital Output Channels
It is recommended that you should use a clamp diode or varistor in order to ensure that the rated voltage of the digital output is not exceeded while switching DO operation modes. Page 48 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 49: Di Module
The digital inputs of the DI module and the DIO module operate in the same way. Thus, refer to the description of the DIO module for the operation of DI channels. ⓒ 2006 Rootech Inc. All Rights Reserved Page 49...
Page 50: Do Module
The digital outputs of the DO module and the DIO module operate in the same way. Thus, refer to the description of the DIO module for the operation of DO channels. Page 50 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 51: Ai Module
1. The inputs of each channel feature differential inputs, and the common-mode voltage should be less than 2 V. Fig 2.52 Analog Inputs Caution Applying current exceeding 20 mA may cause damage to the internal circuits of the meter. ⓒ 2006 Rootech Inc. All Rights Reserved Page 51...
Page 52: Ao Module
Caution Allowable load resistance should be under 450 Ω. When a voltage drop of over 10 V occurs for 0 – 20 mA current output, constant current output is not guaranteed. Page 52 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 53: A4D2 Module
The digital outputs of the A4D2 module and the DIO module operate in the same way. Thus, refer to the description of the DIO module for the operation of DO channels. ⓒ 2006 Rootech Inc. All Rights Reserved Page 53...
Page 54: A2D4 Module
The digital outputs of the A2D4 module and the DIO module operate in the same way. Thus, refer to the description of DIO module for the operation of DO channels. RTD Module Fig 2.57 RTD Module Page 54 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 55 (24 – 12 AWG) / max. 0.51 Nm (5.2 kgf-cm, 4.5 Ibf-in) RTD sensor PT100, PT1000 Wiring mode 4-wire, 3-wire, 2-wire connection Accuracy ±0.5 % Full scale Full scale: 200 ℃ ⓒ 2006 Rootech Inc. All Rights Reserved Page 55...
Page 57: Eld Module
The digital outputs of the ELD module and the DIO module operate in the same way. Thus, refer to the description of the DIO module for the operation of DO channels. ⓒ 2006 Rootech Inc. All Rights Reserved Page 57...
Page 58: Temp Module
* Up to 6 Accura TSEN/THSEN devices can be connected to the TEMP module at a maximum distance of 100 m. * The communication cables used to connect the TEMP module to Accura TSEN/THSEN devices are not provided. Page 58 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 59 Max. 8 seconds 1. FTP(Foiled Shield Twisted Pairs), STP(Braided Shield Twisted Pairs), SFTP(Braided Foiled Shield Twisted Pairs). The communication cables used to connect the TEMP module to Accura TSEN/THSEN devices are not provided. ⓒ 2006 Rootech Inc. All Rights Reserved Page 59...
Page 60: Chapter 3 Operation/Setup
Item Description Display mode Displays the measurement data of Accura 3550 and the status of each channel of the IO modules Setup mode Enables users to check and change setup items (wiring mode, PT, Ethernet communication, events, etc.) Once you enter the setup mode, the SETUP LED blinks.
Page 61: Display Mode
Button Operation In display mode, you can check measurement parameters of Accura 3550 and the status of I/O modules. You can move between all display screens using Left(＜), Up(＾), Down(ｖ), and Right(＞) arrow buttons.
Page 62: Full Screen View In The Display Mode
Chapter 3 Operation/Setup Accura 3550 User Guide Full Screen View in the Display Mode It displays information on measurement parameters of Accura 3550 and operational status of IO modules. … 1. The data appears only when the IO module is connected.
Page 63: Measurement Data
Max. line-to-line voltage ▣ ▣ Min. line-to-line voltage ▣ ▣ Max. line-to-neutral voltage ▣ ▣ Min. line-to-neutral voltage ▣ ▣ Voltage THD[%] ▣ THD% Frequency Fig 3.3 Line-to-Line Voltage Display Screen ⓒ 2006 Rootech Inc. All Rights Reserved Page 63...
Page 64: Fig 3.4 Current Display Screen
Total Current ▣ ▣ Fundamental current ▣ ▣ FUND Max. current ▣ ▣ Min. current ▣ ▣ Current THD [%] ▣ THD% Fundamental residual current FUND Fig 3.4 Current Display Screen Page 64 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 65: Fig 3.5 Power Display Screen
Min. active power ▣ ▣ kVAR Max. reactive power ▣ ▣ Max. apparent power ▣ ▣ Power factor ▣ ▣ Phase angle status (Lead/Lag) ▣ ▣ Fig 3.5 Power Display Screen ⓒ 2006 Rootech Inc. All Rights Reserved Page 65...
Page 66: Fig 3.6 Energy Display Screen
2. Received active energy (Delivered active energy) is a positive value measured from the load side(generator side). Fig 3.6 Energy Display Screen The energy value is displayed in 9 digits including the 4 digits on the 3 row and the 5 digits on the 4 row. Page 66 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 67: Fig 3.7 Demand Display Screen
The screen displays the data on the measurement and status of each module with columns added according to the number of modules attached to the back of Accura 3550. What appears on the screen varies by the module type. Refer to 「Display Mode > IO Module’s Measurement Screen」 for details.
Page 68: Fig 3.9 Ethernet Connection Status Display Screen
The following table shows the text indicating the status of the port. Text Indicating Port Status Port Status Description Root port Path to RSTP root node Designated port Path to RSTP leaf node Page 68 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 69 An error occurred in the transmitted packet on the port 1. rcu.E Error in the received packet. An error occurred in the received packet on the port 1. The device connected to the port 1 supports STP instead of RSTP. ⓒ 2006 Rootech Inc. All Rights Reserved Page 69...
Page 70 The following screen shows IP information on the partner device when Accura device with the RSTP feature enabled is connected to the port 1. Fig 3.12 IP Address Info on the Partner Device Connected to Port 1 Page 70 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 71: Fig 3.14 Cpu Temperature Information
1. It is measured by the built-in temperature sensor in the CPU. The temperature varies by the number of IO modules attached to the back of the device and their operational status. Fig 3.14 CPU Temperature Information ⓒ 2006 Rootech Inc. All Rights Reserved Page 71...
Page 72: Display Screens For Io Modules
The following screens show the status information on the IO modules including the DC, DIO, DI, DO, AI, AO, A4D2, A2D4, RTD, ELD, and TEMP modules. The ID of each module is displayed on the 1 row of the screen. Page 72 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 73: Output Current
DO Status Indication DO Contact Point Status When the Polarity is Normal When the Polarity is Reverse Off ( _ ) Open contact Closed contact On (ㅁ) Closed contact Open contact ⓒ 2006 Rootech Inc. All Rights Reserved Page 73...
Page 74: Fig 3.16 Main Screen Of The Dio Module
DO Status Indication DO Contact Point Status When the Polarity is Normal When the Polarity is Reverse Off ( _ ) Open contact Closed contact On (ㅁ) Closed contact Open contact Page 74 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 75: Fig 3.17 Main Screen Of The Di Module
DO channel state of DIO modules. As the state of 4 channels is displayed on one screen, the state of 6 channels is displayed on two screens. You can check each screen in sequence by using the Up(＾) and Down(ｖ) arrow buttons. Fig 3.18 Main Screen of the DO Module ⓒ 2006 Rootech Inc. All Rights Reserved Page 75...
Page 76: Fig 3.19 Main Screen Of The Ai Module
The output signal range and the size of measurement data can be configured through 「MODULE(AO Module) > Ao tyPE(AO Channel Type)」 in the setup mode, and separate setup can be performed for each channel. Page 76 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 77: Fig 3.20 Main Screen Of The Ao Module
Analog output channels have the same functions as the channels of the AO module and digital output channels have the same functions as the channels of the DO module. Fig 3.21 Main Screen of the A4D2 Module ⓒ 2006 Rootech Inc. All Rights Reserved Page 77...
Page 78: Fig 3.22 Main Screen Of The A2D4 Module
4 rows of the screen, respectively . You can check each screen in sequence by using the Up(＾) and Down(ｖ) arrow buttons. Fig 3.23 Main Screen of the RTD Module Page 78 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 79: Fig 3.24 Main Screen Of The Eld Module
Up(＾) and Down(ｖ) arrow buttons. The digital output channel has the same functions as the channels of the DO module. Fig 3.24 Main Screen of the ELD Module ⓒ 2006 Rootech Inc. All Rights Reserved Page 79...
Page 80: Fig 3.25 Main Screen Of The Temp Module Connected To Accura Tsen
Up(＾) and Down(ｖ) arrow buttons. Fig 3.25 Main Screen of the TEMP Module Connected to Accura TSEN Fig 3.26 Main Screen of the TEMP Module Connected to Accura THSEN Page 80 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 81: Setup Mode
If no button is pressed for 1 minutes while changing set values, it automatically returns to the setup mode. 1. It can be configured via communication, and it is the default value. ⓒ 2006 Rootech Inc. All Rights Reserved Page 81...
Page 82: Full Screen View In The Setup Mode
Chapter 3 Operation/Setup Accura 3550 User Guide Full Screen View in the Setup Mode It displays the setup parameters of Accura 3550 and IO modules. Page 82 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 83: Measurement Setup
CT Rating Setup Item Description Default Ct (Current Transformer) Pr (Primary) CT primary current rating [A] 50 A 00,001 – 99,999 Sc (Secondary) CT secondary current rating [A] 01 – 99 ⓒ 2006 Rootech Inc. All Rights Reserved Page 83...
Page 84: Reference Voltage
Demand time is determined by the demand subinterval and the number of demand subintervals. Refer to 「Chapter 4 Measurements > Calculating Measurement Parameters > Demand」 for details. Setup Item Description Default dMd SbIt (Demand Sub-Interval) 01 – 60 Demand subinterval [min] 15 minutes Page 84 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 85: Calculation Of Total Power
Number of demand subintervals Calculation of Power Per Phase Accura 3550 supports two methods for calculations of reactive power[Q] and apparent power[S] per phase. Refer to 「Chapter 4 Measurements > Calculating Measurement Parameters> Power Per Phase」 for details. Setup Item...
Page 86 1.0 or 0.0. Setup Item Description Default PF No.Ld (PF No Load) Displays power factor as 1.0 with no load Displays power factor as 0.0 with no load Page 86 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 87: Event Setup
When the measured voltage and current values for three phases are zero, it is determined as a blackout event. When voltage or current for any phase is normally measured, the blackout event ends. Setup Item Description Default bLak Out (Blackout) Event detection disabled Event detection enabled ⓒ 2006 Rootech Inc. All Rights Reserved Page 87...
Page 88 Delay Time for Temperature Events Setup Item Description Default tEMP tIME (Temperature Time delay) 0 – 9 Delay time[sec] used to 0 second determine the start of the event Page 88 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 89: Io Module Id Setup
Up to two IO modules can be attached to Accura 3550. For normal operation, IDs should be set to the numbers from 1 to 9, and they should be not duplicate. Long press the ENTER button to set up IDs. Select the ID with the Up(＾) and Down(ｖ) arrow buttons and long press the ENTER button again to complete...
Page 90: Io Module Setup
IP address 010.010.010.100 255.255.255.255 Subnet Mask Setup Item Description Default Sbnt (Subnet Mask) 255.000.000.000 – Subnet mask 255.255.255.000 255.255.255.252 Gateway Setup Item Description Default gate (Gateway) 000.000.000.000 – Gateway 010.010.010.001 255.255.255.255 Page 90 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 91: Mac Address
Enter the IP address of the NTP(Network Time Protocol) server for the time synchronization of the device. Setup Item Description Default NtP (NTP IP Address) 000.000.000.000 – IP address of the NTP server 010.010.010.001 255.255.255.255 ⓒ 2006 Rootech Inc. All Rights Reserved Page 91...
Page 92: Storm Control
RSTP disabled RSTP enabled DHCP Setup Item Description Default dhcP (DHCP) DHCP disabled DHCP enabled Storm Control Setup Item Description Default StrM ctrL (Storm Control) Storm control disabled Storm control enabled Page 92 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 93: Rs-485 Communication Setup
Description Default Prty (Parity bit) nonE No Parity EuEn Odd Parity EuEn Even Parity Stop Bit Setup Item Description Default StoP (Stop bit) 1 stop bit 1 bit 2 stop bit ⓒ 2006 Rootech Inc. All Rights Reserved Page 93...
Page 94: Communication Address
1. For normal communication, it should be set to a non-zero value. RS-485 Communication Map If the communication map is configured as “r200”, communication can be performed with the same map used for the RTM 200 device manufactured by Rootech. Setup Item Description...
Page 95: Reset Setup
Resets demand values Peak Demand Reset Setup Item Description Default PEak dMd (Peak Demand) rESEt Resets peak demand Max/Min Reset Setup Item Description Default Max Min (Maximum Minimum) rESEt Resets the maximum/minimum values ⓒ 2006 Rootech Inc. All Rights Reserved Page 95...
Page 96: Etc. Setup
FND Brightness Setup Item Description Default Fnd LEuL (FND Level) 3 − 10 FND brightness level LED Brightness Setup Item Description Default LEd LEuL (LED Level) 3 − 10 LED brightness level Page 96 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 97: Demo Mode
Demo operation for balanced 3-phase system UnbaL Demo operation for unbalanced 3-phase system Information Display Serial Number Setup Item Description Default Sn (Serial Number) 51[d][d][d][d][d][d] Product serial number 1. [d] → decimal ⓒ 2006 Rootech Inc. All Rights Reserved Page 97...
Page 98: Hardware Version
Application Version Setup Item Description Default A.uEr (Application Version) [d].[d].[d][d][d] Application version 1. [d] → decimal Firmware Version Setup Item Description Default F.uEr (Firmware Version) [d].[d].[d][d][d] Firmware version 1. [d] → decimal Page 98 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 100 Displays the module type and the channel info dC / Iout Rectifier output current (I ) channel of DC module SIgn (Sign) Maintains the sign of the measured value on Removes the sign of the measured value Page 100 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 101 Form A contact, and reverse polarity indicates a Form B contact. DI Value DI Contact Status When the Polarity is Normal When the Polarity is Reverse 0 ( _ ) Open contact Closed contact 1 (ㅁ) Closed contact Open contact ⓒ 2006 Rootech Inc. All Rights Reserved Page 101...
Page 102 Normal polarity indicates a Form A contact, and reverse polarity indicates a Form B contact. DO Command DO Contact Status When the Polarity is Normal When the Polarity is Reverse Off ( _ ) Open contact Closed contact On (ㅁ) Closed contact Open contact Page 102 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 103: Fig 2.43 Dc Module
On this screen, you can check the software version of the DC module. Setup Item Description Default Displays the module type DC module SUEr (Software Version) b [d] Bootloader version F [d].[d][d] Firmware version ⓒ 2006 Rootech Inc. All Rights Reserved Page 103...
Page 104 The device detects a change in DI 100 msec status only if the input state is maintained longer than the set time [msec]. It is set to prevent the device from responding to chatter and noise signals. Page 104 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 105 Latch, you can directly move to the DO hold mode setup screen. If the output type is set to Periodic pulse, Energy pulse or Single pulse, the screen switches to the pulse setup screen. ⓒ 2006 Rootech Inc. All Rights Reserved Page 105...
Page 106 [d]: DO channels of the DIO module: Ch 1 – 2 H.Пod (Hold Mode) Cont Continuous Cont Maintains the DO mode until the user resets it d.7IПE Definite Time Resets the DO mode automatically after the set hold time passes Page 106 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 107 1 2.ㅏUrh Q2 kVARh Associated with reactive energy in quadrant 2 3.ㅏUrh Q3 kVARh Associated with reactive energy in quadrant 3 4.ㅏUrh Q4 kVARh Associated with reactive energy in quadrant 4 ⓒ 2006 Rootech Inc. All Rights Reserved Page 107...
Page 108 On this screen, you can check the software version of the DIO module. Setup Item Description Default Displays the module type DIO module SUEr (Software Version) b [d] Bootloader version F [d].[d][d] Firmware version Page 108 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 109 On this screen, you can check the software version of the DI module. Setup Item Description Default Displays the module type DI module SUEr (Software Version) b [d] Bootloader version F [d].[d][d] Firmware version ⓒ 2006 Rootech Inc. All Rights Reserved Page 109...
Page 110 On this screen, you can check the software version of the DO module. Setup Item Description Default Displays the module type DO module SUEr (Software Version) b [d] Bootloader version F [d].[d][d] Firmware version Page 110 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 111 Displays the module type and the channel info AI / AI_[d] [d]: AI channels of the AI module Ch 1 – 6 HI (High Value) -99,999.9 − 99,999.9 Actual value corresponding to 20 mA 20.0 ⓒ 2006 Rootech Inc. All Rights Reserved Page 111...
Page 112 Displays the module type and the channel info AI / AI_[d] [d]: AI channels of the AI module Ch 1 – 6 ПAug (Moving Average Interval) 1 − 32 Interval used to calculate the average 32 value Page 112 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 113 On this screen, you can check the software version of the AI module. Setup Item Description Default Displays the module type AI module SUEr (Software Version) b [d] Bootloader version F [d].[d][d] Firmware version ⓒ 2006 Rootech Inc. All Rights Reserved Page 113...
Page 114 Associated with the average of three-phase currents ㅏuu Associated with active energy Associated with power factor ㅏUar kVAR Associated with reactive energy ㅏUa Associated with apparent energy FrEq Freq Associated with frequency Page 114 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 115 On this screen, you can check the software version of the AO module. Setup Item Description Default Displays the module type AO module SUEr (Software Version) b [d] Bootloader version F [d].[d][d] Firmware version ⓒ 2006 Rootech Inc. All Rights Reserved Page 115...
Page 116 On this screen, you can check the software version of the A4D2 module. Setup Item Description Default Displays the module type A4d2 A4D2 module SUEr (Software Version) b [d] Bootloader version F [d].[d][d] Firmware version Page 116 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 117 On this screen, you can check the software version of the A2D4 module. Setup Item Description Default Displays the module type A2d4 A2D4 module SUEr (Software Version) b [d] Bootloader version F [d].[d][d] Firmware version ⓒ 2006 Rootech Inc. All Rights Reserved Page 117...
Page 118 On this screen, you can check the software version of the RTD module. Setup Item Description Default Displays the module type RTD module SUEr (Software Version) b [d] Bootloader version F [d].[d][d] Firmware version Page 118 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 119 [d]: channels of the ELD module: Ch 1 – 6 Internal resistance and burden resistance 1 – 9,999 Internal resistance of each voltage-type 1,000 ZCT product [Ω] 1 – 9,999 Burden resistance of each voltage-type 1,200 ZCT product [Ω] ⓒ 2006 Rootech Inc. All Rights Reserved Page 119...
Page 120 On this screen, you can check the software version of the ELD module. Setup Item Description Default Displays the module type ELD module SUEr (Software Version) b [d] Bootloader version F [d].[d][d] Firmware version Page 120 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 121 On this screen, you can check the software version of the TEMP module. Setup Item Description Default Displays the module type tEMP TEMP module SUEr (Software Version) b [d] Bootloader version F [d].[d][d] Firmware version ⓒ 2006 Rootech Inc. All Rights Reserved Page 121...
Page 122: Event Mode
Event Mode Event Notifications Accura 3550 provides notifications on events when the device detects the occurrence of power quality events such as fuse fail, phase open, and blackout events, as well as temperature events. When an event occurs, the EVENT LED on the front of the device blinks.
Page 123: Button Operation
1. Press the button and release it immediately. When the button is pressed, it makes a beeping sound. 2. Press the button for more than one second and release it. A beeping sound occurs in one second. ⓒ 2006 Rootech Inc. All Rights Reserved Page 123...
Page 124: Event Log Number
You can select the Event Log screen with the Left(<) and Right(＞) arrow buttons. And then you can check the time when the event occurs by pressing the Down(ｖ) arrow button. Page 124 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 125: Fuse Fail Event Log
The event log displays the information when a fuse fail event ends. Display E[d][d][d] Event number 000 – 999 FuSE Fuse Fail event The event ends. [d][d][d][d][d] Duration time of the event [msec] 1. d → decimal ⓒ 2006 Rootech Inc. All Rights Reserved Page 125...
Page 126: Phase Open Event Log
The event log displays the information when a phase open event ends. Display E[d][d][d] Event number 000 – 999 Ph.Op Phase Open event The event ends. [d][d][d][d][d] ms Duration time of the event [msec] 1. d → decimal Page 126 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 127: Blackout Event Log
The event log displays the information on when a blackout event ends. Display E[d][d][d] Event number 000 – 999 b.Out Blackout event The event ends. [d][d][d][d][d] ms Duration time of the event [msec] 1. d → decimal ⓒ 2006 Rootech Inc. All Rights Reserved Page 127...
Page 128: Temperature Event Log
Chapter 3 Operation/Setup Accura 3550 User Guide Temperature Event Log Overtemperature Start Event Log The event log displays the information when the temperature of Accura 3550 device starts to increase. Display E[d][d][d] Event number 000 – 999 tПP.S The overtemperature event occurs.
Page 129: Required Setup Steps
Accura 3550 User Guide Chapter 3 Operation/Setup Required Setup Steps For normal operations of Accura 3550, it is required to take the following steps. Wiring Mode The default setting is three phase 4 wire configuration. In order to change the wiring mode, follow the steps below(an example of three phase 3 wire connection).
Page 130 ⑦ Long press the ESC button. → Exit the setup mode and move to the display mode. 1. Press the button for more than 1 second. A beeping sound occurs in 1 second. Page 130 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 131: Chapter 4 Measurements
> Aggregation」. Frequency Cycle Frame 1 Sec 60 Hz 1 cycle (16.7 ms) 12 cycles (0.2 sec) 5 frames 50 Hz 1 cycle (20.0 ms) 10 cycles (0.2 sec) 5 frames ⓒ 2006 Rootech Inc. All Rights Reserved Page 131...
Page 133: Calculating Measurement Parameters
The following table shows the parameters measured by the device. Some of measurement data are provided only via communication. Measured values shown on Accura 3550 device are the values obtained for 1- second aggregation interval generated by aggregating data on 5 frames for the data measured for 0.2 seconds.
Page 134 �� =2 �� 3. TDD (Total Demand Distortion): : For the I value you can select the peak demand current (default) or TDD �� nominal current via communication. Page 134 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 135 60 Hz and 50 Hz, respectively. 8. The trend of voltage data features the trend of line-to-neutral voltage in 3P4W mode and the trend of line-to-line voltage in 3P3W mode. ⓒ 2006 Rootech Inc. All Rights Reserved Page 135...
Page 136: Voltage Wiring
The following measurement data are provided. Item LN Voltage (RMS) LL Voltage (RMS) Current (RMS) Active Power A phase * PF B phase * PF C phase * PF Average /Total Page 136 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 137: Fig 4.4 3P3W Connection With 2Pts And 3Cts
3-Phase 3-Wire(3P3W) Connection In 3P3W connection, the voltage wiring method differs according to the number of the PTs(Potential Transformer) used in the wiring configuration. However, Accura 3550 measures voltage signals in the same way regardless of the wiring method. Fig 4.4 3P3W Connection with 2PTs and 3CTs The method of measuring voltage is as follows.
Page 138 However, by using a virtual neutral point where the residual voltage value(V ) of three phase voltages becomes zero, voltage and power values per phase can be calculated. Page 138 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 139: Fig 4.5 1P3W Connection With 2Pts And 2Cts
– V The following measurement data are provided. Item LN Voltage (RMS) LL Voltage (RMS) Current (RMS) Active Power A phase * PF B phase C phase * PF Average / Total ⓒ 2006 Rootech Inc. All Rights Reserved Page 139...
Page 140: Fig 4.6 1P2W Connection With 1 Pt And 1 Ct
= 0 (The value becomes 0 in 1P2W mode.) The following measurement data are provided. Item Voltage (RMS) Current (RMS) Active Power A phase * PF B phase C phase Average / Total Page 140 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 141: Residual Voltage
Residual current(Irsd) is generated by adding up the current for each phrase, and the RMS and fundamental values are provided for the calculated residual current. ( �� ) �� ∑ �� =��,��,�� ∑ √2�� (2�� + ∅ ��,�� 1,�� 1,�� =��,��,�� ⓒ 2006 Rootech Inc. All Rights Reserved Page 141...
Page 142: Power Per Phase
The magnitude of reactive power for each phase is calculated based on apparent power and active power values including harmonics. The sign of reactive power corresponds to that of reactive power calculated based on fundamental frequency components. = ± √ �� − �� Page 142 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 143: Total Three-Phase Power
The total apparent power is calculated based on the vector sum of the total active power and reactive power. = √ �� + �� Fig 4.7 Vector Sum of the Total Apparent Power | St | ⓒ 2006 Rootech Inc. All Rights Reserved Page 143...
Page 145: Power Factor
The relationships between the sign of the power factor and the phase angles(LEAD/LAG) of voltage and current in 4 quadrants are shown below. When reactive power(Q) is 0, it is in neither Lead nor Lag status. Fig 4.9 PF Sign and Phase Angle Lead/Lag ⓒ 2006 Rootech Inc. All Rights Reserved Page 145...
Page 146: Energy
Integer of Accumulated Values (Unit of Accumulation) Available Data Quadrant 1 123,456 VARh 123 kVARh Quadrant 2 22,000 VARh 22 kVARh Quadrant 3 33,560 VARh 33 kVARh Quadrant 4 44,780 VARh 44 kVARh Page 146 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 147: Apparent Energy
0 – (2 VARh quadrant 3 Reactive energy in quadrant 4 Accumulation of reactive power in 0 – (2 VARh quadrant 4 Apparent energy Accumulation of apparent power 0 – (2 ⓒ 2006 Rootech Inc. All Rights Reserved Page 147...
Page 148: Demand
- As a set value is greater, thermal demand features faster response time. - When the thermal response index is set to 100, the P value refers to the latest demand value. Page 148 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 149: Fig 4.12 Predicted Demand Calculation
Fig 4.12 Predicted Demand Calculation Demand Sync Accura 3550 supports two methods for synchronizing the starting time of a demand subinterval. 1) Hourly Auto Sync: automatically synchronizes the starting time of a demand subinterval every hour 2) Manual Sync: synchronizes the starting time of a demand subinterval at the time users issue a sync command For Hourly Auto Sync, synchronization is performed every 60 minutes.
Page 150: Fig 4.13 Hourly Auto Sync
Fig 4.14 Manual Sync source input Demand Time (T =15 min) Avg 4.3 Avg 4.7 Avg 2.9 Avg 3.4 Avg 3.2 1:04 2:09 1:00 1:09 1:14 1:19 1:59 2:04 time Manual sync command Page 150 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 151: Harmonics
∶ peak demand current ��,�� ,�� 1,�� ,�� You can configure the TDD nominal current instead the peak demand current as the I value for the calculation of TDD. ⓒ 2006 Rootech Inc. All Rights Reserved Page 151...
Page 152: Unbalance (Nema Mg1)
��ℎ, �� Iph,avg: the average value of three-phase currents Max(ΔIph): the maximum difference between the three-phase current value and the average value of three-phase currents ∣ Current – the average current ∣ Page 152 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 153: Negative-Sequence/Zero-Sequence Unbalance
This is the ratio of the zero-sequence component to the positive-sequence component. The zero-sequence unbalance value of the line-to-line voltage is always zero. �� = × 100 [%] �� ⓒ 2006 Rootech Inc. All Rights Reserved Page 153...
Page 154: Converting Analog Input Current
Fig 4.19 Output Range: 0 – 20 mA Output Current 4-20 mA Output Current 0-20 mA 20 mA 20 mA 4 mA 0 mA Output Output Value Value (low) (high) (low) (high) Page 154 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 155: Fig 4.20 Analog Output Current Converted From Power Factor
The power factor can be a positive or negative value. However, when converting the value to the analog output current value, its sign is removed, and only the positive value is converted to the analog output current value. ⓒ 2006 Rootech Inc. All Rights Reserved Page 155...
Page 156: Events
Over Temperature Event If the temperature of Accura 3550 rises above a certain threshold and remains for the time(0 – 9 sec) set by the user, it is presumed that an over temperature event occurs. Page 156...
Page 157: Aggregation
Chapter 4 Measurements Aggregation Accura 3550 performs gapless sampling and calculations of measured signals per cycle and continues to generate 0.2-second frame data by aggregating data measured over 12(60Hz) or 10(50Hz) cycles. Based on the data, it provides data aggregated over various intervals not less than 1 second (1 and 5 seconds, 1 and 5 minutes, 1 and 6 hours, and 1 day).
Page 158: Collection Of Aggregation Data
By selecting an aggregation interval, users can collect the data on the selected aggregation interval through the Modbus map. Because the aggregated data are stored in the circular buffer in Accura 3550 for a certain period of time, users can collect aggregated measurement values with greater flexibility.
Page 159: Appendix A Specifications
Measurement cycle (gapless) 0.2 seconds (12 cycles @60 Hz/10 cycles @50 Hz) Voltage Sampling rate 512 samples/cycle Rated voltage (Un) AC 230 V L-N Measuring range 35 – 277 V line-to-neutral ⓒ 2006 Rootech Inc. All Rights Reserved Page 159...
Page 160 Average value of the values measured for 0.2 seconds Max/Min value Max/Min value among the values measured for 0.2 seconds Aggregation for the Last latched value Provides the last measured data by latching the value Page 160 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 161 Up to 1,219 m (4,000 ft) Bit rate 1,200 / 2,400 / 4,800 / 9,600 / 19,200 / 38,400 / 57,600 / 115,200 bps Max. number of connectable 32 per bus modules ⓒ 2006 Rootech Inc. All Rights Reserved Page 161...
Page 162 8. For specific measurement parametersincluding energy, demand, and IO modules’ digital input and output data, the device provides the data measured for the last 0.2 seconds by latching the data. 9. The built-in switch allows for Ethernet connection between Accura 3550 devices without the need for an external switch.
Page 163: Accura 3550 Io Modules
Summary of IO IO Modules The features of Accura 3550 IO modules are summarized as shown in the table below. Up to two IO modules, including the DC module can be attached to the device regardless of module type and connection order. .
Page 164 Wiring specification / Torque 0.25 – 4.0 mm (24 – 12 AWG) / max. 0.51 Nm (5.2 kgf-cm, 4.5 Ibf-in) Output range DC current 0 – 20 mA Allowable load resistance No more than 450 Ω Page 164 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 165: Fig 2.7 Do Module
/ AO Accuracy ±0.5 % Full scale Full scale: 20 mA Digital output Number of channels Port name / DO A2D4 Module Analog output Number of channels Port name / AO ⓒ 2006 Rootech Inc. All Rights Reserved Page 165...
Page 166 Temperature Measurement with Accura TSEN Temperature sensor Located at the bottom end of the device Accuracy Typ. 1.0 ℃ Measuring range -20 – 100 ℃ Response time [τ 63%] Max. 30 seconds Page 166 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 167 7. The communication cables used to connect the TEMP module to Accura TSEN/THSEN devices are not provided. 8. FTP(Foiled Shield Twisted Pairs), STP(Braided Shield Twisted Pairs), SFTP(Braided Foiled Shield Twisted Pairs) ⓒ 2006 Rootech Inc. All Rights Reserved Page 167...
Page 168: Appendix B Standards
UL 61010-1 3rd edition, IEC 61010-2-030 2nd edition, UL 61010-2-201 2nd edition EN 55011: 2016/A11:2020, EN IEC 61326-1:2021, EN IEC 61326-2-1:2021, EN IEC 61000-3-2:2019/A1:2021, EN 61000-3-3:2013/A2:2021 EN 55011:2016/A11:2020, EN IEC 61326-1:2021, EN IEC 61326-2-1:2021 General 2 years Warranty period Page 168 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 169: Iec 61557-12:2018 Performance Measuring And Monitoring Devices(Pmd)
Current Range Min. Bandwidth Crest Factor Class 0.2 (Harmonic) PMD Sx 10 % In – Imax. 45 Hz to 15 times ±0.2 % rated frequency PMD Dx 20 % Ib – Imax. ⓒ 2006 Rootech Inc. All Rights Reserved Page 169...
Page 171: Iec 62053-22:2020 Static Meters For Ac Active Energy (Class 0.2S)
5 % In – 10 % In ±1.0 % 10 % In – Imax ±0.5 % 0.25 ±1.0 % 1. Un indicates the rated voltage, and In indicates the rated current. ⓒ 2006 Rootech Inc. All Rights Reserved Page 171...
Page 172: Appendix C Accuracy/Reliability
Accura 3550 User Guide Appendix C Accuracy/Reliability Accuracy Measurement by Accura 3550 Accura 3550 meets measurement accuracy in the range broader than the measuring range required for the IEC 61557-12 standard as shown in the table below. Item Accuracy Measuring Range (Accuracy Guaranteed) / Minimum Measured Value IEC 61557-12 Class 0.2...
Page 173: Reliability
Power frequency magnetic field immunity test IEC 61000-4-11 Voltage dip, reduction 100/60/30 %, Period R1/12/30 Voltage dips, short interruptions and voltage Short interruptions, reduction 100 %, Period 300 variations immunity test ⓒ 2006 Rootech Inc. All Rights Reserved Page 173...
Page 174: Appendix D Ordering Information
1. The voltage-type ZCT is not included in the product package. Thus, you should separately purchase it from a ZCT manufacturer. 2. The communication cables used to connect the TEMP module to Accura TSEN/THSEN devices are not provided. Page 174 ⓒ 2006 Rootech Inc. All Rights Reserved...
Page 175 Accura 3300E, Accura 3500/3550/3500E, Accura 3700, Accura 5500, Accura 7300, and Accura 7500 are trademarks of Rootech Inc. Contact us for detailed product specifications and ordering information. Information contained herein is subject to change without notice. CopyrightⓒRootech Inc. Printed In Korea...

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