ROOTECH ACCURA 3550S User Manual
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ROOTECH ACCURA 3550S User Manual

Digital power meter for rectifier panel with the dc module for use with rectifiers
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  • Page 1: Notice

    Page 1...

  • Page 2: Symbols

    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.
  • Page 3 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.
  • Page 4 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 5 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 6 Revision History The following versions of the Accura 3550S User’s Guide have been released. Revision # Revision date Description Firmware version Revision 1.0 2008. 03. 05 Initial draft Revision 1.1 2000. 11. 28 Voltage input range modified Revision 1.2 2015. 05. 12 Standard compliance updated Revision 1.3...

  • Page 7: Table Of Contents

    Contents Notice.............................. 1 Symbols ............................2 Chapter 1 Introduction ........................11 Overview ............................11 AC/DC Power Measurements for Rectifier Panels ..............11 Accurate Measurements / Power Quality Data Available ............11 Proven Safety and Reliability with CE/UL Certifications .............. 11 Features ............................
  • Page 8 Step 4: Wiring the Power Supply and Ground Terminal ..............29 Power Supply.......................... 29 Ground Terminal ........................29 Step 5: Adding the Basic Module[DC module] ................. 30 Step 6: Wiring the Basic Module ..................... 31 DC Module ..........................31 Step 7: Wiring the Power Supply and Ground Terminal of the Basic module ........34 Power Supply..........................
  • Page 9 Figures Fig 1.1 Front Side ........................17 Fig 1.2 Rear Side ........................17 Fig 1.3 Basic Module[DC Module] Rear Side ................17 Fig 1.4 Front View ........................18 Fig 1.5 Rear View ........................18 Fig 1.6 Side View ........................18 Fig 1.7 ANSI 4”...
  • Page 10 Fig 2.7 DC module channel information.................. 51 Fig 2.8 DC module rectifier current shunt ................55 Fig 2.9 DC module battery current shunt ................. 55 Fig 2.10 DC module digital input channel 1 of rectifier fault ............. 55 Fig 2.11 DC module digital input channel 2 of rectifier fault ............. 55 Fig 2.12 DC module digital input channel 3 of rectifier fault .............

  • Page 11: Chapter 1 Introduction

    Overview AC/DC Power Measurements for Rectifier Panels Accura 3550S is a high accuracy digital power meter for rectifier panels and performs both AC and DC power measurements. In existing rectifier panels, DC transducers are used to measure DC voltages and currents and converted them into analog signals, and users can get the data via analog inputs of the RTU.

  • Page 12: Features

    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 received , kWh/kVARh delivered kWh/kVARh net[kWh/kVARh received - kWh/kVARh delivered] kWh/kVARh total[kWh/kVARh received + kWh/kVARh delivered] ◼...

  • Page 13: Power Supply

    Power Supply AC 85 ~ 265V, 50/60Hz ◼ DC 100 ~ 300V ◼ Burden: 10VA ◼ Page 13...

  • Page 14: Applications

    Power Quality Analysis Accura 3550S 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.

  • Page 15: Parameters

    Parameters Item Realtime Average Total Maximum Minimum Phase voltage † † ■ ■ ■ ■ † † Line to line voltage ■ ■ ■ ■ † Current ■ ■ ■ † Power Active ■ ■ ■ † † Reactive ■ ■...

  • Page 16: Chapter 2 Mounting

    Chapter 2 Mounting Environmental Conditions The Accura 3550S 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...

  • Page 17: Before You Begin

    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 Fig 1.3 Basic Module[DC Module] Rear Side Page 17...

  • Page 18: Meter Dimensions

    Meter Dimensions Fig 1.4 Front View Fig 1.5 Rear View Fig 1.6 Side View Page 18...

  • Page 19: Step 1: Mounting

    Step 1: Mounting Sequence Remove connector on the bottom of the meter. Fit the meter into cutout[ANSI 4” or DIN96] 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 1.7 ANSI 4”...

  • Page 20: Step 2: Voltage And Current Inputs

    Step 2: Voltage and Current Inputs Fig 1.9 Voltage and Current Connector Voltage Input Item Description Pin name Connector Terminal block Wire spec 2.1 to 3.5 mm [ 14 to 12 AWG] Rating 0 ~ 600V 3 ~ L-L[Line to line], 0 ~ 457V 3 ~ L-N[Line to neutral] Burden 0.02VA/phase @220V Impedance...

  • Page 21: Current Input

    Current Input Item Description Pin name 1S, 2S, 3S, 1L, 2L, 3L Connector Terminal block[Busbar] Wire spec 2.1 to 6 mm [ 14 to 10 AWG] Ratings 5A nominal/ 10A full scale 3 ~ Burden Maximum 0.005A/phase @10A Pollution degree 2, Installation Category Ⅲ Compliance CT[Current Transformer] Item...

  • Page 22: Wiring Diagram Using External Pts

    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 1.10 Single Phase 2 Wire Connection, Wiring Mode = 1P2U Caution In single phase 2 wire mode, be sure to use V , 1S, 1L terminals as the above.
  • Page 23 Fig 1.11 Three Phase 3 Wire Open Delta Connection Using 2CTs, Wiring Mode = 3P3O Caution In three phase 3 wire open delta connection mode, be sure to connect V to V as the above. Fig 1.12 Three Phase 3 Wire Open Delta Connection Using 3CTs, Wiring Mode = 3P3O Caution In three phase 3 wire open delta connection mode, be sure to connect V to V...
  • Page 24 Fig 1.13 Three Phase 4 Wire Connection Using 3 PTs and 3 CTs, Wiring Mode = 3P4U Page 24...

  • Page 25: Direct Connection Diagram Using No Pts

    Direct Connection Diagram Using No 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 1.14 Single Phase 2 Wire Direct , Wiring Mode = 1P2U Caution In single phase 2 wire mode, be sure to use V , 1S, 1L terminals as the above.
  • Page 26 Fig 1.15 Single Phase 3 Wire Direct Connection Using 2 CTs, Wiring Mode = 1P3U Caution In single phase 3 wires, be sure to use V , 1S, 1L, 3S, 3L terminals as the above. Fig 1.16 Three Phase 3 Wire Open Delta Direct Connection, Wiring Mode = 3P3O Caution In three phase 3 wire open delta direct connection mode, use PTs for voltages over 457V [line to line].
  • Page 27 Fig 1.17 Three Phase 3 Wire Open Delta Direct Connection Using 3 CTs Wiring Mode = 3P3O Caution In three phase 3 wire open delta direct, use PTs for voltages over 457V [line to line]. be sure to connect V to V as the above.

  • Page 28: Step 3: Wiring The Device For Rs485 Communication

    Using a UL2919 cable is recommended for communication. Comm Indicator The Comm LED blinks green when the meter is transmitting data. Protocol The meter provides Modbus RTU protocol. Refer to the Accura 3550S Communication User’s Guide for details about the Modbus protocol. Page 28...

  • Page 29: Step 4: Wiring The Power Supply And Ground Terminal

    Step 4: Wiring the Power Supply and Ground Terminal Fig 1.20 Wiring of Power Supply and Ground Terminal Power Supply Item Description Pin name PP[+/L], PN[-/N] Connector Screw terminal[Pluggable] Wire spec 1.25 to 3.5 mm [ 24 to 14 AWG] Ratings AC 85 ~ 265V, 50/60Hz ~, DC 100 ~ 300V Compliance...

  • Page 30: Step 5: Adding The Basic Module[Dc Module]

    Note Wire the meter’s ground terminal G to switchgear earth ground. Do not use metal door hinges as a ground path Step 5: Adding the Basic Module[DC module] Fig 1.21 Adding the Basic Module Caution When the basic module[DC module] is not added or detected, the SETUP LED blinks. Page 30...

  • Page 31: Step 6: Wiring The Basic Module

    Step 6: Wiring the Basic Module DC Module The Accura 3550S is provided with the DC module as the basic module. Fig 1.22 DC Module NC means “No Connection”. DC Voltage/Current DC voltage Rectifier current Battery current Pin name OUT+...

  • Page 32: Fig 1.24 Digital Input

    Fig 1.23 DC Voltage/Current 4 Digital Input Channels Ch 1 Ch 2 Ch 3 Ch 4 Pin name Ground As common ports, DI ports are internally connected. Item Description Connector Screw Terminal[Pluggable] Application Dry contact Wire 1.25 to 3.5 mm2[ 24 to 14 AWG] Min Pulse Width 10 ms Fig 1.24 Digital Inputs...

  • Page 33: Fig 1.25 Dc Relay Application

    Caution Applying the external voltage to digital inputs causes damage to the meter because DC 8V is internally applied to dry contacts. 1 Digital Output Channel Ch 1 Pin name Ground Item Description Connector Screw Terminal[Pluggable] Wire 1.25 to 3.5 mm [ 24 to 14 AWG] Signal type Latch or Pulse...

  • Page 34: Step 7: Wiring The Power Supply And Ground Terminal Of The Basic Module

    Caution Use an external relay in order to control the load with the digital output above the maximum rating, AD/DC 400V 350mA, of digital output. Step 7: Wiring the Power Supply and Ground Terminal of the Basic module Fig 1.27 Wiring of Power Supply and Ground Terminal of the Basic Module Power Supply Item Description...

  • Page 35: Ground Terminal

    Ground Terminal Item Description Pin name Connector Screw Terminal[Pluggable] Wire spec 2.1 to 3.5 mm [ 14 to 12 AWG] Note Wire the meter’s ground terminal G to switchgear earth ground. Do not use metal door hinges as a ground path Page 35...

  • Page 36: Step 8: Powering Up The Meter

    Step 8: Powering Up the Meter Close the PT fuses( or direct voltage input fuses). Open the CT shorting blocks. Apply power to the meter. Page 36...

  • Page 37: Chapter 3 Meter Operation/Setup

    Chapter 3 Meter Operation/Setup Each of these functions can be accomplished by pressing the Menu, Up, Down, and Enter buttons on the front panel. Item Description Display mode View parameter measurements Setup mode Configure parameters[wiring, communication, etc.] Reset mode Reset energy, demand, maximum, and minimum. System mode View meter system information[meter option, firmware version].

  • Page 38: Display Mode

    Display Mode In Display mode, you can view values from these measurement groups. Fig 2.1 Group A, B Fig 2.2 Group C Fig 2.3 Group D Fig 2.4 Group E † Measurement group C, E automatically returns to A, B after 30 seconds when “group auto-return” menu item of system mode is on[default].

  • Page 39: Fig 2.5 X1000, X10 Led

    x1000 LED When the “x1000” LED is lit, multiply the displayed value by 1000 for actual value. When the “x10” LED is lit, multiply the displayed value by 10 for actual value. Fig 2.5 x1000, x10 LED Moving between Parameters in Each Group Button Function Move to the previous measurement group A, C.
  • Page 40 Voltage a Current a kW a Voltage b Current b kW b Voltage c Current c kW c † ‡ AVG/TOT means Average/Total. Total kW[phase a, b, c] ◼ Three phase 3 wires Order Parameter † ‡ AVG/TOT Line voltage average Current average Total kW Line voltage ab...
  • Page 41 Parameter Display in the Following Order In Group C Order Parameter kWh net[9digit] kWh received[9digit] kWh delivered[9digit] kWh total[9digit] Energy configured in “display energy” menu item of system mode is first displayed, and the others are recursively displayed. kWh/kVARh received is positive for “view as load”, kWh/kVARh delivered is positive for “view as generator”.
  • Page 42 ◼ Three phase 3 wires Order Parameter Voltage ab THD Current a THD Voltage bc THD Current b THD Voltage ca THD Current c THD ◼ Single phase 3 wires Order Parameter Voltage a THD Current a THD Voltage c THD Current c THD ◼...

  • Page 43: Setup Mode

    Setup Mode In Setup mode, you can set up menus, such as PT/CT ratio, wiring, and communication after mounting the meter. Button Functions in Setup Mode Button Function Enter setup mode by pressing the Up and Down buttons at the same time.
  • Page 44 Wiring mode Single phase 2 wires Single phase 3 wires Three phase 3 wires, Open Delta √ Three phase 4 wires Comm address 1 ~ 247 √ Protocol Modbus RTU Rootech † Speed[bps] 1200bps 2400bps 4800bps √ 9600bps 19200bps 38400bps 57600bps ‡...

  • Page 45: Reset Mode

    Reset Mode In Reset Mode, you can reset Energy, Demand, and the maximum/minimum values. Button Functions in Reset Mode Button Function Enter reset mode by pressing the Down and Enter buttons at the same time. Move to the previous menu screen. Move to the next menu screen.

  • Page 46: System Mode

    System Mode You can view system information, such as product number, version, demand time, frequency selection, etc. Button Functions in System Mode Button Function Enter System Mode Move to the previous menu screen. Move to the next menu screen. Enter system edit mode to configure the displayed menu value. →...
  • Page 47 Menu Items Order Menu Item Range Default Demand time 1 ~ 60 Frequency 50Hz, 60Hz √ Reactive power calculation Method 1 Method 2 † Group auto-return √ Display energy kWh received kWh delivered kWh total kWh net √ Transmission delay time 0 to 50 ‡...

  • Page 48: Reactive Power Calculation

    Reactive Power Calculation Rootech supports two methods for accurate calculation of reactive power. Method 1: General Calculation Method 1 is used to obtain reactive power, and apparent power by using calculation of vector apparent power.  PF = Fig 2.6 P , Q[according to general calculation]...
  • Page 49 Method 2: Calculation of Harmonics Method 2 is used to obtain reactive power from apparent and active power, and the overall apparent power by using calculation of vector apparent power.   PF = Note P can be a positive or negative value, while Q is always a negative value. Page 49...

  • Page 50: Module Mode

    Module Mode Module mode has both display and setup menus. In module display menu You can view information of module and its channels, and in module setup menu configure channels of module. Module Display Menu Button Functions in Module Mode Button Function Enter module mode.
  • Page 51 Fig 2.7 Channel Information of DC Module Page 51...

  • Page 52: Module Setup Menu

    Module Setup Menu Button Functions in Module Mode Button Function Enter module mode by pressing the Up and Down buttons at the same time. Move to the previous menu screen. Move to the next menu screen. Enter module edit mode to configure the displayed menu value. †...
  • Page 53 Note In module edit mode, pressing button exits system edit mode and moves to display mode, without saving the changed value of menu item. Page 53...

  • Page 54: Fig 1.22 Dc Module

    Menu Items Order Menu Item Range DC module rectifier current Refer to Fig 2.8 Shunt type 50mV 60mV 100mV Max current 0 ~ 999A DC module battery current Refer to Fig 2.9 Shunt type ±50mV 50mV 60mV 100mV Max current 0 ~ 999A DC module digital input channel 1 Refer to Fig 2.10...
  • Page 55 Over discharge Over charge DC module digital output channel 1 Refer to Fig 2.14 Digital output channel type Latch Pulse Pulse width time 0.1 ~ 10.0s † Users can select the condition in which the data are displayed on the screen when a fault occurs in a rectifier.
  • Page 56 Fig 2.12 DC module’s digital input channel 3 in the fault Fig 2.13 DC module’s digital input channel 4 in the fault condition in the rectifier condition in the rectifier Fig 2.14 Setup of the DC module’s digital output channel 1 Page 56...

  • Page 57: Appendix A Specifications

    Appendix A Specifications Voltage Input Rating 0 to 600V 3 ~ L-L, 0 to 457V 3 ~ L-N Use PTs for voltages over 457V line to line in three phase 3 wire open delta direct connection mode. Calibration 60 to 220V per phase Wiring 1P2W, 1P3W, 3P3W, 3P4W Burden...

  • Page 58: Appendix B Standard Compliance

    Appendix B Standard Compliance Accuracy IEC62053-22 Class 0.5S Safety UL61010-2, 2 edition(IEC61010) IEC61326-1(IEC61000-4-2) Electrostatic Discharge(ESD) IEC61326-1(IEC61000-4-3) EM Field IEC61326-1(IEC61000-4-4) Electric Fast Transient Surge Immunity IEC61326-1(IEC61000-4-5) Conducted Radio Frequency Immunity IEC61326-1(IEC61000-4-6) IEC61326-1(IEC61000-4-8) Rated Power Frequency Magnetic Field IEC61326-1(IEC61000-4-11) Voltage Dip/Short Interruptions Certificate UL (35DX, Measuring Equipment) General...

  • Page 59: Appendix C Test Report

    Measuring Test IEC62053-22, Electricity Meter Equipment: active energy for Class 0.5S Current range Power factor Class 0.2S/ 0.5S Accura 3550S 0.05A < I < 0.25A ± 0.4%/ ± 1.0% ± 0.4% 0.25A < I < 10.0A ± 0.2%/ ± 0.5% ±...

  • Page 60: Reliability Test

    ‡ Class 0.5S means IEC62053-22 Class 0.5S. Harmonics Accura 3550S Harmonic Voltage Current ±1.0% ±1.0% ±1.0% ±1.0% ±1.0% ±1.0% ±1.0% ±1.0% ±1.0% ±1.0% ±1.0% ±1.0% *Voltage : 220V, Tested percentages of harmonic-to-fundamental: 50% Current : 5A, Tested percentages of harmonic-to-fundamental: 50%...

  • Page 61: Appendix D Dc Voltage Scale Setup

    Appendix D DC Voltage Scale Setup Setup Menu for the Channels of Each Module Menu Item Order Menu Item Setup Range Default: 1.00 DC voltage scale setup 0.01 to 99.99 Refer to Fig 2.15. Fig 2.15 DC Voltage Scale Setup Calculation of DC Voltage Scale Page 61...
  • Page 62 ⓒ 2008 Rootech Inc. All Rights Reserved Accura 2300/2350, Accura 2300S/2350, Accura 2500/2550, Accura 2700/2750, Accura 3000, Accura 3300E, Accura 3300S/3300, Accura 3500S/3500, Accura 3550S/3550, Accura 3700, Accura 5500, and Accura 7500 are trademarks of Rootech Inc. Contact us for detailed product specifications and ordering information.

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