ROOTECH Accura 3300E User Manual
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ROOTECH Accura 3300E User Manual

High accuracy digital power meter
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  • Page 2 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. ⓒ 2015 Rootech Inc. All Rights Reserved Page 2...
  • 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 Accura 3300E User Guide Warranty 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 Accura 3300E User Guide Revision History The following versions of the Accura 3300E User Guide have been released. Revision Date Description Revision 1.00 2015. 12. 04 Initial release Revision 1.01 2016. 02. 20 The following wording “the description of the temperature” is changed to the temperature of Accura 3300E.

  • Page 7: Table Of Contents

    Reset Setup ..........................59 DISPLAY Setup ......................... 61 INFO/ETC Setup ........................64 Necessary Steps for Device Setup ....................65 Accura 3300E Voltage Wiring Connection, PT Rating Configuration ........... 65 Chapter 4 Measurements ......................... 67 ⓒ 2015 Rootech Inc. All Rights Reserved Page 7...
  • Page 8 Aggregation ........................... 82 Appendix A Specifications ........................ 83 Appendix B Standard Compliance ....................84 Appendix C Accuracy/Reliability ......................85 Accuracy ..........................85 Reliability ..........................86 Appendix D Ordering Information ....................87 ⓒ 2015 Rootech Inc. All Rights Reserved Page 8...
  • Page 9 Fig 2.6 Accura 3300E Side Dimensions ..................17 Fig 2.7 Accura 3300E Rear Dimensions ..................17 Fig 2.8 Mounting Accura 3300E on the Panel [ANSI 4”] ............. 18 Fig 2.9 Mounting Accura 3300E on the Panel [DIN96] ............... 18 Fig 2.10 Voltage/Current Wiring ....................19 Fig 2.11 3 Phase 4 Wire Connection with 3 PTs and 3 CTs ............
  • Page 10 Fig 4.8 Power Sign and Current Phase LEAD/LAG ..............79 Fig 4.9 Demand Calculation ....................80 Fig 4.10 Calculation of Predicted Demand ................80 Fig 4.11 Symmetrical Components ................... 81 Fig 4.12 Aggregation Process ....................82 ⓒ 2015 Rootech Inc. All Rights Reserved Page 10...

  • Page 11: Chapter 1 Introduction

    K-factor, and unbalance. This makes it possible for energy managers to easily identify changes in power quality at power facilities. Maximum/Minimum/Average Values Available In an Aggregation Interval Accura 3300E calculates the average of the data collected every 0.2 seconds based on the data measured over cycle.

  • Page 12: Applications

    Chapter 1 Introduction Accura 3300E User Guide Proven Safety and Reliability with CE/UL/KC Certifications The internal and external structures(product and circuit design) of Accura 3300E meet safety and reliability requirements for CE[EN 61326-1, EN 61326-2-1], UL[UL 61010-1], KC[KN 22, KN 24] certifications.

  • Page 13: Product Information

    Product Features Accura 3300E Digital Power Meter Accura 3300E has ± 0.2% of reading accuracy for voltage and current measurement and meets IEC 62053-22 Class 0.5S standards for power and energy measurement. Also, it provides various information such as harmonics [up to the 31 order], Crest factor, K-factor, unbalance, etc.
  • Page 14 �� ��=1 Crest factor: K-factor: ∑ �� �� ������ ��=1 �� It is not for fire monitoring but for reference only(A temperature sensor is located on the side of Accura 3300E]. ⓒ 2015 Rootech Inc. All Rights Reserved Page 14...

  • Page 15: Chapter 2 Installation

    Chapter 2 Installation Chapter 2 Installation Environmental Conditions Accura 3300E should be mounted in a dry, dirt free location away from heat sources and very high electric fields. To operate the product properly, environmental conditions as below should be considered.

  • Page 16: Before You Begin

    Chapter 2 Installation Accura 3300E User Guide Before You Begin Before installing the Accura 3300E, observe the following instructions and safety precautions. Caution Power up after voltage and current wiring is completed. Meter Overview Fig 2.1 Accura 3300E Front Fig 2.2 Accura 3300E Side Fig 2.3 Accura 3300E Rear...

  • Page 17: Components

    Fig 2.4 Accura 3300E Components Accura 3300E Two fixing nuts, bolts Rear protection Short bar Connector cover Dimensions Fig 2.5 Accura 3300E Front Dimensions Fig 2.6 Accura 3300E Side Dimensions Fig 2.7 Accura 3300E Rear Dimensions Dimensions Device Model Dimensions [mm] Digital Power Meter Accura 3300E 126.3W x 114.0H x 77.4D...

  • Page 18: Step 1: Mounting

    Accura 3300E User Guide Step 1: Mounting Accura 3300E Panel Mounting Accura 3300E is mounted on the front of the distribution panel. ① Place the meter into the cutout. [ANSI 4”, DIN96 supported] ② Mount the connector to right side of Accura 3300E.

  • Page 19: Step 2: Voltage/Current Wiring

    1.1 x (the maximum measuring range) Frequency range 42 – 69 Hz Burden 0.02 VA/phase @ 220 V Withstand voltage AC 2,000 V RMS, 60 Hz for 1 minute Impedance 3 MΩ/phase Measurement Category CAT Ⅲ ⓒ 2015 Rootech Inc. All Rights Reserved Page 19...
  • Page 20 UL 61010-1 Burden > 3VA Note In case that peak expected load is remarkably lower than CT rating current, selecting the much lower CT rating current can improve accuracy and resolution. ⓒ 2015 Rootech Inc. All Rights Reserved Page 20...

  • Page 21: Fig 2.11 3 Phase 4 Wire Connection With 3 Pts And 3 Cts

    - In case of wiring without CTs, wiring must be done following the guidelines of the company. Fig 2.11 3 Phase 4 Wire Connection with 3 PTs and 3 CTs Wiring Mode[Conn] = 3P4U Note Select 3P4U on “Connection” setup menu screen. ⓒ 2015 Rootech Inc. All Rights Reserved Page 21...

  • Page 22: Fig 2.12 3 Phase 3 Wire Connection With 2 Pts And 3 Cts

    Select 3P3U on “Connection” setup menu screen. Fig 2.13 3 Phase 3 Wire Connection with 2 PTs and 2 CTs Wiring Mode[Conn] = 3P3U Note Select 3P3U on “Connection” setup menu screen. ⓒ 2015 Rootech Inc. All Rights Reserved Page 22...

  • Page 23: Fig 2.14 1 Phase 3 Wire Connection With 2 Pts And 2 Cts

    Fig 2.15 1 Phase 2 Wire Connection with 1 PT and 1 CT Wiring Mode[Conn] = 1P2U Note and V terminals must be used. Select 1P2U on the “Connection” setup menu screen. ⓒ 2015 Rootech Inc. All Rights Reserved Page 23...

  • Page 24: Fig 2.16 3 Phase 4 Wire Direct Connection With 3 Cts

    Note Select 3P4U on “Connection” setup menu screen. Fig 2.17 3 Phase 3 Wire Voltage Direct Connection with 3 CTs Wiring Mode[Conn]=3P3U Note Select 3P3U on the “Connection” setup menu screen. ⓒ 2015 Rootech Inc. All Rights Reserved Page 24...

  • Page 25: Fig 2.18 3 Phase 3 Wire Voltage Direct Connection With 2 Cts

    Select 3P3U on the “Connection” setup menu screen. Fig 2.19 1 Phase 3 Wire Voltage Direct Connection with 2 CTs Wiring Mode[Conn]=1P3U Note Select 1P3U on the “Connection” setup menu screen. ⓒ 2015 Rootech Inc. All Rights Reserved Page 25...

  • Page 26: Fig 2.20 1 Phase 2 Wire Voltage Direct Connection With 1 Ct

    Accura 3300E User Guide Fig 2.20 1 Phase 2 Wire Voltage Direct Connection with 1 CT Wiring Mode[Conn]=1P2U Note and V terminals must be used. Select 1P2U on “Connection” setup menu screen. ⓒ 2015 Rootech Inc. All Rights Reserved Page 26...

  • Page 27: Step 3: Wiring Accura 3300E For External Communication

    Chapter 2 Installation Step Wiring Accura 3300E External Communication RS-485 Communication Accura 3300E supports one RS-485 communication port. Fig 2.21 RS-485 Communication of Accura 3300E Fig 2.22 RS-485 Communication Connection of Accura 3300E ⓒ 2015 Rootech Inc. All Rights Reserved Page 27...
  • Page 28 Wire spec 0.21 to 3.5 mm [24 to 12 AWG], Shielded twisted pair Maximum cable length 1,219m[4,000 ft] Maximum number 32/bus connectable devices Connect the Shield line to the G terminal. ⓒ 2015 Rootech Inc. All Rights Reserved Page 28...

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

    Accura 3300E User Guide Chapter 2 Installation Step 4: Wiring Power Supply and Ground Terminal Fig 2.23 Accura 3300E Power Supply Power Supply Item Description Port name L+, N- Connector type Screw terminal[Pluggable] Wire spec 2.1 to 3.5 mm [14 to 12 AWG] Rating AC 85 - 265V 50/60 Hz, DC 100 –...

  • Page 30: Ground Terminal

    Wire the meter’s ground terminal to the earth ground of distribution panel. Caution If voltage over 265 V, the maximum operating voltage is supplied to Accura 3300E, severe damage occurs to the device. ⓒ 2015 Rootech Inc. All Rights Reserved...

  • Page 31: Chapter 3 Operation/Setup

    Chapter 3 Operation/Setup Chapter 3 Operation/Setup The front side of Accura 3300E consists of the 4.7” LCD screen which shows measurement data and setup information, three status LEDs which display the state of power supply and communication, and four buttons used to select all operation modes.

  • Page 32: Fig 3.2 Screen Example In Display Mode

    Also, at the state that the event is not generated, you can confirm the event logs by long pressing EVENT button. In EVENT Log mode, “Event” segment of top bar is turned on. ⓒ 2015 Rootech Inc. All Rights Reserved Page 32...

  • Page 33: Fig 3.4 Screen Example In Event Log Mode

    SETUP mode. If an event is generated, LCD backlight duration time for the blink is default 5 seconds and can be additionally configured up to 9,999 minutes by the user configuration. ⓒ 2015 Rootech Inc. All Rights Reserved Page 33...
  • Page 34 Automatically return to DISPLAY mode if there is no button operation for 10 minutes in the SETUP mode. - Automatically return to SETUP mode if there is no button operation for 1 minute in the Edit mode. ⓒ 2015 Rootech Inc. All Rights Reserved Page 34...

  • Page 35: Display Mode

    Accura 3300E User Guide Chapter 3 Operation/Setup DISPLAY Mode Front View Fig 3.5 Accura 3300E Front Overview Voltage Current Active Power Reactive Power Apparent Power Energy Power Factor - PF Line to Neutral - L-N Line to Line - L-L...
  • Page 36 RS-485 communication element configuration - COMM - RESET Reset element configuration LCD display element configuration - DISPLAY - INFO or Meter information such as serial number, version, etc. G: Unit H: Graph ⓒ 2015 Rootech Inc. All Rights Reserved Page 36...

  • Page 37: Display Screen

    Accura 3300E User Guide Chapter 3 Operation/Setup Display Screen Accura 3300E displays data on all measurement parameters. ⓒ 2015 Rootech Inc. All Rights Reserved Page 37...

  • Page 38: Measurement Parameter Display Screen

    The last screen in the first column displays the average voltage value of three phases, total power, and energy [V·P·E]. On this screen, the total energy value with nine digits is displayed in the third and the fourth lines. ⓒ 2015 Rootech Inc. All Rights Reserved Page 38...

  • Page 39: Fig 3.7 Last Screen Appearing In The First Column Of Display Mode

    Down[ｖ] button, fundamental phase and average current, maximum phase current, minimum phase current, current THD and current THD are displayed in order. By pressing the Up[ｖ] button, values are displayed in the reverse order. ⓒ 2015 Rootech Inc. All Rights Reserved Page 39...

  • Page 40: Fig 3.9 Current Display Screen

    At the first screen of demand display column, demand active power for each phase and total demand active power value which is the sum of three phase demand active power are displayed. By pressing the Down[ｖ] button, demand current, ⓒ 2015 Rootech Inc. All Rights Reserved Page 40...

  • Page 41: Fig 3.11 Demand Active Power Screen

    Fig 3.12 NET Energy Display Screen in Energy Display By pressing the Right[＞] button again on the energy display screen, the screen moves to the ETC screen. On the ETC screen, the temperature of Accura 3300E is displayed. ⓒ 2015 Rootech Inc. All Rights Reserved...

  • Page 42: Fig 3.13 Temperature Display Screen In Etc Display Mode

    Chapter 3 Operation/Setup Accura 3300E User Guide Fig 3.13 Temperature Display Screen in ETC Display Mode ⓒ 2015 Rootech Inc. All Rights Reserved Page 42...

  • Page 43: Event Log Mode

    EVENT Log Mode Generation of Event Alarms Accura 3300E provides event alarms if the device detects an event such as fuse fail, phase open, blackout, overtemperature, etc. When the event alarm is generated, the LCD backlight and the EVENT LED at the bottom left side of the screen blink.

  • Page 44: Fig 3.14 Event Log Number Example

    E102 E998 E999 Final Event Log number E999 Final Event Log number Event log number is as followed. Event Log number Oldest saved event N-49 Event Log number Latest saved event ⓒ 2015 Rootech Inc. All Rights Reserved Page 44...
  • Page 45 - E[Event] [d][d][d] 000 - 999 Event generated[Phase B - B PHSE[Phase] Phase open - OPEn[Open] The phase [A, B, C] where the event occurs is displayed. d → decimal number ⓒ 2015 Rootech Inc. All Rights Reserved Page 45...
  • Page 46 Over-temperature Event Log Displays the information when an over-temperature event occurs. Display Event number - E[Event] [d][d][d] 000 - 999 Over-temperature event occurs. - tEnP [Temperature] - OvEr [Over] d → decimal number ⓒ 2015 Rootech Inc. All Rights Reserved Page 46...

  • Page 47: Setup Mode

    Left[＜], Up[＾], Down[ｖ], Right[＞], ESC, and ENTER button. At this time, the position of the present page can be easily confirmed as SETUP menu is displayed on “Navigation Menu” space at lower part of LCD. SETUP Menu ⓒ 2015 Rootech Inc. All Rights Reserved Page 47...

  • Page 48: Meter Setup

    PT primary line to line voltage rating - Pr[Primary] [d][d][d][d][d][d] 000001 - 999999 [default 380] PT secondary line to line voltage rating - Sc[Secondary] [d][d][d] 001 - 999 [default 380] d → decimal number ⓒ 2015 Rootech Inc. All Rights Reserved Page 48...
  • Page 49 Reference current is used as the reference of front bar graph display and TDD configuration. Setup Range - Pr[Primary] CT primary reference current [d][d][d][d][d].[d] 00000.1 - 99999.9 Accura 3300E-5A [default 50.0] Accura 3300E-1A [default 10.0] d → decimal number ⓒ 2015 Rootech Inc. All Rights Reserved Page 49...
  • Page 50 → Number of Demand Subintervals] Accura 3300E uses “Sliding window” Demand Measuring Method. Demand time[minute] = demand subinterval x number of demand subintervals. Ex] For national case[15 minute demand time], demand subinterval is 15 minutes and number of demand subintervals is 1. Refer to Chapter 4 for details.
  • Page 51 Three Phase Total Power Calculation [tot VA CaLc → Total VA Calculation Method] Accura 3300E supports two methods for calculation of three phase total power from power per phase. One method is to calculate total apparent power by vector sum of each phase apparent power and the other is to calculate total apparent power by arithmetic sum of each phase apparent power.
  • Page 52 The configured minimum measured value is based on input current of Accura 3300E and current unit is mA. In case of configuring as 20mA[default value] when input current rating of Accura 3300E is 5A, the value under the 1/250 of the rating would be displayed as 0. Setup Range...
  • Page 53 OFF , the sign of reactive power is not displayed. Setup Range - on[ON, default] Sign of reactive power is displayed. Sign of reactive power is not displayed. - oFF[OFF] ⓒ 2015 Rootech Inc. All Rights Reserved Page 53...
  • Page 54 1, 2, and 3, [default 123] respectively. Normal current flow from the - P[Positive, default] Source(S) to the Load(L) Reverse current flow from the - n[Negative] Load(L) to the Source(S) d → decimal number ⓒ 2015 Rootech Inc. All Rights Reserved Page 54...

  • Page 55: Event Setup

    In case that voltage and current of all phase are measured as 0, it is detected as blackout event. Setup Range Phase open and Blackout event on - On - oFF[default] Phase open and Blackout event off ⓒ 2015 Rootech Inc. All Rights Reserved Page 55...
  • Page 56 - 20 - 200 Over-temperature event start level - [default 50] Over-temperature Event End Level[tnP.E → Temperature End] Setup Range - 0 to (Start Level - Over-temperature event end level ℃ - [default 48] ⓒ 2015 Rootech Inc. All Rights Reserved Page 56...

  • Page 57: Rs-485 Communication Setup

    Parity Bit ] Setup Range Even Parity - EuEn[default] None Parity - nonE Odd Parity - odd Stop Bit[StoP → Stop Bit ] Setup Range 1 stop bit - 1[default] 2 stop bit ⓒ 2015 Rootech Inc. All Rights Reserved Page 57...
  • Page 58 In order to read measurement data via communication, the address should be set to a valid value not zero. Setup Range 1 - 247 - [d][d][d] [default 0] d → decimal number ⓒ 2015 Rootech Inc. All Rights Reserved Page 58...

  • Page 59: Reset Setup

    Setup Range - rESEt[Reset] Demand reset Maximum/Minimum Reset[MaH → Maximum, MIn → Minimum ] The maximum demand value is reset by resetting the maximum/minimum values. Setup Range Resets maximum/minimum - rESEt[Reset] values ⓒ 2015 Rootech Inc. All Rights Reserved Page 59...
  • Page 60 Accura 3300E User Guide Energy Reset[Enrg Energy ] → Setup Range Energy[kWh, kVARh, kVAh] reset - rESEt[Reset] All Reset[ALL → ALL ] Setup Range Resets all [Demand, maximum/minimum, - rESEt[Reset] energy] values ⓒ 2015 Rootech Inc. All Rights Reserved Page 60...

  • Page 61: Display Setup

    Five lower-order digit numbers are - Low[Low-Fixed] displayed. LCD Backlight Time[LIgt → Light, tInE → Time ] Setup Range – - 10 300 sec [default 60] ⓒ 2015 Rootech Inc. All Rights Reserved Page 61...
  • Page 62 After some time passes after pressing the button last time, brightness changes from High to Middle value. Low : After changing to the configured Middle value, brightness is gradually diminished to the Low value. ⓒ 2015 Rootech Inc. All Rights Reserved Page 62...
  • Page 63 0°, -120°, 120° In case of modifying the PT ratio, it Unbalance provides the voltage proportional to the Provides Voltage angles per unbalanced 3 phase PT ratio. phase: 0°, -128.4°, 111.6° condition ⓒ 2015 Rootech Inc. All Rights Reserved Page 63...

  • Page 64: Info/Etc Setup

    - [d].[d][d] CT type [Accura 3300E-5A/1A] - Ct_[d]A d → decimal number Firmware Version [FUEr → Firmware Version] Setup Range Firmware Version of the product - [d].[d][d] d → decimal number ⓒ 2015 Rootech Inc. All Rights Reserved Page 64...

  • Page 65: Necessary Steps For Device Setup

    For normal operation of Accura 3300E, the following steps for device setup should be taken. Accura 3300E Voltage Wiring Connection, PT Rating Configuration Configures voltage wiring connection and PT rating [in case of using external PT] of Accura 3300E. Wiring Connection[Conn→ Connection] In case of 3 phase 4 wire, the following substeps are skipped as it is default configuration.
  • Page 66 The primary and secondary current ratings of the CT are used as the ratio only for measuring the current. Used as the reference value of the bar graph display on the front side. ⓒ 2015 Rootech Inc. All Rights Reserved Page 66...

  • Page 67: Chapter 4 Measurements

    LCD screen of Accura 3300E. Measurement values displayed on the front LCD screen of Accura 3300E are aggregated values for the 1-second interval based on the basic measurement data collected for the 0.2-second interval.
  • Page 68 ▲ ▲ ▲ ▲ Apparent Power Predicted Demand Apparent Power ▲ ▲ Magnitude of Voltage Harmonics Harmonics ▲ (DC, 1 - 31 Magnitude of Current Harmonics ▲ (DC, 1 - 31 ⓒ 2015 Rootech Inc. All Rights Reserved Page 68...

  • Page 69: Measurement Event Parameters

    Measurement Event Parameters Measurement event parameters provided by communication and Accura 3300E are shown in the table below. In the EVENT Log mode, “Event” segment at the top bar is turned on and up to the last 50 event logs can be checked.

  • Page 70: Measurements According To Voltage Connection Modes

    = V3 Calculation of line – V = V1 – V2 to line voltage – V = V2 – V3 – V = V3 – V1 : Voltage of connected N terminal ⓒ 2015 Rootech Inc. All Rights Reserved Page 70...

  • Page 71: Three Phase 3 Wire Connection

    Phase B (I2) * PF Phase C (I3) * PF Average/ Total Three Phase 3 Wire Connection Fig 4.2 Connection with 2 PTs and 3 CTs, Wiring Mode = 3P3U (3P3W Connection) ⓒ 2015 Rootech Inc. All Rights Reserved Page 71...

  • Page 72: Fig 4.3 Connection With 2 Pts And 2 Cts, Wiring Mode = 3P3U (3P3W Connection)

    Vn = Vo/3 voltage ▶ Newly calculated virtual center point is the center of mass of the triangle comprised of V1, V2 and V3. : Voltage of floating N terminal ⓒ 2015 Rootech Inc. All Rights Reserved Page 72...
  • Page 73 However, by calculating the virtual center point that residual voltage of line to neutral voltage in three phases and considering this as a new neutral point, voltage and power for each phase are measured by Accura 3300E. ⓒ 2015 Rootech Inc. All Rights Reserved Page 73...

  • Page 74: Single Phase 3 Wire Connection

    = V3 – V1 – V Provided Measurement Data Item L-N Voltage [rms] L-L Voltage [rms] Current [rms] Active Power (I1) * PF Phase A Phase B (I3) * PF Phase C Average/ Total ⓒ 2015 Rootech Inc. All Rights Reserved Page 74...

  • Page 75: Single Phase 2 Wire Connection

    = 0 (by 1P2W configuration) = 0 (by 1P2W configuration) Provided Measurement Data Item L-N Voltage [rms] L-L Voltage [rms] Current [rms] Active Power (I1) * PF Phase A Phase B Phase C Average/ Total ⓒ 2015 Rootech Inc. All Rights Reserved Page 75...

  • Page 76: Power Measurement Per Phase

    Chapter 4 Measurements Accura 3300E User Guide Power Measurement Per Phase Accura 3300E supports two methods for calculation of reactive[Q] and apparent power[S] per phase. (1) Calculation from fundamental frequency components: Reactive energy is calculated based on fundamental voltage and current.

  • Page 77: Three-Phase Power Measurement

    �� �� �� Three-phase Power Measurement Accura 3300E supports two methods for calculation of reactive [Qt] and apparent power[St] for three phase sum. (1) Vector Sum: Total apparent power is calculated based on vector sum of three phase apparent power.

  • Page 78: Arithmetic Sum

    The sign of total reactive power follows the sign of total reactive power calculated in vector sum calculation method. = ± √ �� �� − �� �� �� �� Fig 4.7 Arithmetic Sum of the Total Apparent Power | St | ⓒ 2015 Rootech Inc. All Rights Reserved Page 78...

  • Page 79: Power Factor(Pf) Measurement

    -0.0 +0.0 Note The phase difference(LEAD/LAG) between current and voltage is displayed on the power factor display screen of Accura 3300E. When reactive power is 0, the status is not displayed. ⓒ 2015 Rootech Inc. All Rights Reserved Page 79...

  • Page 80: Demand Measurement

    Demand Measurement Demand Accura 3300E calculates the demand time by multiplying the demand subinterval by the number of subintervals. Average of demand time is calculated and measured by sliding in demand subinterval half-cycle interval. Peak demand is the maximum value among demands after the reset.

  • Page 81: Unbalance[Nema Mg1]

    Zero-sequence component, U0: the component with the same magnitude and phase angle Positive-sequence component, U1: Symmetrical component with the phase sequence of A-B-C Negative-sequence component, U2: Symmetrical component with the phase sequence of A-C-B ⓒ 2015 Rootech Inc. All Rights Reserved Page 81...

  • Page 82: Negative Sequence Unbalance Ratio

    �� Aggregation Accura 3300E provides the basic measurement data for the 0.2-second interval by sensing and processing voltage and current signals every 0.2 seconds. Aggregation for the interval which is longer than 0.2 seconds is performed, and aggregated values are provided as shown in the following figure based on the measurement data collected for 0.2 seconds.

  • Page 83: Appendix A Specifications

    -20 to 70C(-4 to 158℉) Safe operating temperature -20 to 65C(-4 to 149℉) Storage temperature -40 to 85C(-40 to 185℉) Operating humidity 5 - 95%(non-condensing) Conforms to the UL 61010-1 standard ⓒ 2015 Rootech Inc. All Rights Reserved Page 83...

  • Page 84: Appendix B Standard Compliance

    Conducted Radio Frequency Common Mode IEC 61000-4-8 Rated Power Frequency Magnetic Field IEC 61000-4-11 Voltage Dip/Short Interruptions Certifications UL 61010-1 EN 61326-1, EN 61326-2-1 KN 22, KN 24 General Warranty period 2 years ⓒ 2015 Rootech Inc. All Rights Reserved Page 84...

  • Page 85: Appendix C Accuracy/Reliability

    Class 0.5S means IEC 62053-24 Class 0.5S. Class 0.5 means IEC 61557-12 Class 0.5. The data are not displayed on the LCD screen of Accura 3300E and are provided only by communication. The LCD screen of Accura 3300E displays x1000 kW/kVar/kVA values.

  • Page 86: Reliability

    [only by communication]. The data are not displayed on the LCD screen of Accura 3300E and are provided only by communication. IEC 62053-22, Electricity Meter Equipment: Active Energy for Class 0.5S...

  • Page 87: Appendix D Ordering Information

    APPENDIX D Ordering Information Appendix D Ordering Information Accura 3300E performs high accuracy measurements with ± 0.2% of reading accuracy for voltage and current, meets IEC 62053-22 class 0.5S standards for power and energy, and provides various power quality information such as harmonics[up to the 31st order], Crest factor, K-factor, unbalance, etc.
  • Page 88 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. Information contained herein is subject to change...

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