Trinity ACCUVAR User Manual
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Trinity ACCUVAR User Manual

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TRINITY
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Summary of Contents for Trinity ACCUVAR

  • Page 1 TRINITY pg. 1...
  • Page 2 This document contains the latest technical information about ACCUVAR which is a microcontroller based KVAR controller for LT capacitor bank. The product, ACCUVAR is sophisticated electronic equipment and, the user is advised to read this User’s Manual carefully before attempting to install or operate the equipment.
  • Page 3 Trinity product prove defective during the warranty period, please bring the product securely packaged in its original container or an equivalent, along with proof of the date of original purchase, to our Trinity Dealer or Factory. You are responsible for all costs (shipping, insurance, travel time) in getting the product to the service location.
  • Page 4 In the event, the remedies above fail, Trinity’s entire liability shall be limited to a refund of the price paid for the Trinity product covered by this limited warranty.

  • Page 5: Table Of Contents

    ACCUVAR - Operational Manual INDEX Introduction ………………………………………………………………………………………………….. The Main Features Available in this Model ……………………………………………………….. Technical Specifications ……………………………………………………………………………. Measurement ……………………………………………………………………………………..Miscellaneous ………………………………………………………………………………………... Installation and Commissioning…………………………………………………………………………… Back View (Connection Scheme) of the Unit……………………………………………………………. Capacitor Panel Connection Scheme……………………………………………………………… Operational Details………………………………………………………………………………………….. Programming Mode………………………………………………………………………………....

  • Page 6: Introduction

    This is where ACCUVAR comes in. ACCUVAR is a KVAR based controller which controls capacitor banks optimally to achieve near unity power factor and also which measures/calculates various electrical parameters.

  • Page 7: The Main Features Available In This Model

    ACCUVAR - Operational Manual The Main Features Available in this Model • 3P4W electrical system • Three powers: KW, KVA and KVAR • Three phase voltages (Vr, Vy & Vb) and currents(Ir, Iy, Ib) • Auto phase sequence and polarity detection and correction •...

  • Page 8: Technical Specifications

    ACCUVAR - Operational Manual Technical Specifications Parameter Type Name Statistics Supply Three Phase and Neutral of a 3P4W system Direct Voltage Input : Up to 300V L-N Voltage Burden : 0.5VA Secondary Current Input : 5A or 1A CT Ratio...

  • Page 9: Measurement

    ACCUVAR - Operational Manual Measurement Parameter Type Name Statistics Voltage (Volts L-N: VRN, Accuracy : 0.5% of Reading VYN, VBN) Current Accuracy : 0.25% of Reading (Amps IR, IY, IB) CT Ratio : Site Selectable Capacitor Current Accuracy : 1.0% of Reading...

  • Page 10: Miscellaneous

    ACCUVAR - Operational Manual Miscellaneous Parameter Type Name Statistics Bezel 144 X 144 mm Panel Cutout 138 X 138 mm Depth of installation 55 mm Operating temp C to 50 Weight 0.82 Kgs (Approx.) Min. Operating Current 1% or 5% of CT primary for FIFO/SFIFO Mode TRINITY pg.

  • Page 11: Installation And Commissioning

    ACCUVAR - Operational Manual Installation and Commissioning To install and commission the unit, proceed the following instructions: Push the unit into the Panel and mount it by using the clamps provided. Back View (Connection Scheme) of the Unit 2. Connect the three phases with the phase sequence being R-Y-B to the terminals marked R, Y and B accordingly such as shown above Connection Scheme.

  • Page 12: Capacitor Panel Connection Scheme

    8. Ensure that all capacitors are in the circuit i.e. all fuses link pushed in. Give Autosense (Refer Operational Details in the next section). ACCUVAR will first display 'AUTOSENSING' and as it switches on one bank at a time and also, displays the bank size of every stage.

  • Page 13: Operational Details

    ACCUVAR - Operational Manual Operational Details The KVAR Based Controller for LT Capacitor Banks, ACCUVAR is a versatile meter, with all the features needed to implement a robust electrical load management system. It can be configured to suit most PF control needs and this is achieved by making as many parameters field programmable as possible.

  • Page 14: Programming Mode

    ACCUVAR - Operational Manual Programming Mode In order to set all the field programmable parameters, the user has to press the keys such as, . Once the display is in Programming Mode, Press key to set the values for the following parameters: 1.

  • Page 15: Setting Main Ct Primary, Main Ct Secondary, Pt Ratio And Mode Of Control Action

    ACCUVAR - Operational Manual 1. Setting Main CT Primary, Main CT Secondary, PT Ratio and Mode of control action. In order to give actual voltage and current values in your system, Main CT Primary and Secondary as well as PT Ratio should be set. Main CT Primary can be select from 5 to 5000.

  • Page 16: Setting Switching, Number Stages, Meter Address And Baud Rate

    The Relay has RS485 port for external communication as an optional feature. ACCUVAR supports MODBUS-RTU protocol on RS485 port. Each device on RS485 bus should have unique address for proper functionality. Unit Address value is programmable from 1 to 255.

  • Page 17: Setting Switch Delay, Damp, Reference Bank Number And Auto Phase Input Detection

    ACCUVAR - Operational Manual Thus, in a fifteen-stage relay, alarm mode NO means a 15 stage Relay, while alarm mode other than NO will make it as 15 stage Relay, with 16 stage used as an alarm contact. There are two additional parameters which need to programmed. i.e. Alarm Limit and Alarm Delay.

  • Page 18: Setting Phase Input Sequence For All Channels And Minimum Bank

    M3/L3. Min.Bank (Minimum Bank) value can be set either to 100% or 75%. In VAR and PID mode, Accuvar will take control action if it finds that the needed KVAR is larger than the smallest bank connected. e.g. if it finds that in order to achieve the desired PF, the system needs to add/remove 8 KVAR, but the smallest bank connected to the system is 10 KVAR, it will not switch, if the MIN BANK is set to 100%.

  • Page 19: Auto Sense, Setting Minimum Operating Current And Pf Value To Switch Off Banks

    ACCUVAR - Operational Manual 2. If other parameters need to be changed, do so using similar method. Else, press for about four seconds continuously. The unit will restart and enter into run mode. 7. Auto Sense, Setting Minimum operating Current and PF Value to Switch OFF Banks When the Auto Sense is set to YES, the unit switches on all relays one by one.

  • Page 20: Run Mode

    ACCUVAR - Operational Manual Run Mode In the run mode, the various parameters calculated by the ACCUVAR are displayed on different pages on a 128 x 64 Display. 1. Screen Displays Press keys on Run Mode so as to receive the following displays:...
  • Page 21 ACCUVAR - Operational Manual This page shows up to 15th Odd harmonics value of R phase volts. This page shows up to 15th Odd harmonics value of R phase current. This page shows up to 15th Odd harmonics value of Y phase volts.

  • Page 22: Resetting Average Pf

    • DO NOT switch small loads like electronic Hooters, small relays with 230V AC coils etc., directly from the relay contact of ACCUVAR. If done so, the small leakage current from the snubbers will not allow these loads to be switched off fully. The electronic hooters thus will give a low hum continuously, and the small relays will switch on but not switch off.

  • Page 23: Troubleshooting

    Auto, by feedback over the Manual Bus. (A). Troubleshooting The ACCUVAR is robust electronic equipment and must be handled with all the care merited by it. It is quite rugged and will withstand a few hard knocks, but this cannot make up for the deficiency in system design.
  • Page 24 ACCUVAR - Operational Manual Faults related to the external cabling Only two cables originate in the panel: the Power Incomer to the panel and the CT connections. The power flow from the source (such as the main transformer) to the capacitor panel as well as to the entire load must be through the bus on which the CTs are mounted.

  • Page 25: Troubleshooting Guide

    ACCUVAR - Operational Manual (B). Troubleshooting Guide (Read carefully section (A). Troubleshooting as before) 1. Relay is dead. Check that the specified voltages are available at the voltage terminals of the Relay. Do not check with a neon tester. Use a multi-meter and check physically the voltages available at the R-Y, Y-B and B-R terminals.
  • Page 26 ACCUVAR - Operational Manual P.O No.: …………………………………………………………………... Customer: ………………………………………………………………… Sr. No.: …………………………………………………………………..Routine and function tests conducted to relevant standards and our Specifications/Literature/O & M Manual. Traceability: tested against "MTE" Standard Model PRS1.3 having basic accuracy of 0.05% traceable upto International Standards derived using appropriate ratio techniques.
  • Page 27 TRINITY ENERGY SYSTEMS PVT. LTD. 386, Savli GIDC Estate, Savli-Vadodara Highway, MANJUSAR - 391 775, Dist. Vadodara, Gujarat, India. Tel.: +91-9228004452 / 53 / 54 Email: sales@trinityenergy.co.in www.trinityenergy.co.in TRINITY pg. 27...

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