Trinity ACCUVAR User manual

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TRINITY

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TRINITY
ACCUVAR - Operational Manual
User’s Manual
ACCUVAR
KVAR BASED CONTROLLER FOR LT CAPACITOR BANKS
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 advisedto read this
User’s Manual carefully before attempting to install or operate the equipment.
Published on: 01.11.2021
Document Version: 2.0

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TRINITY
ACCUVAR - Operational Manual
Warranty Statement
Trinity warrants to the original retail purchaser of the Trinity product
enclosed with this limited warranty statement that the product, if
purchased new and used in the India conforms to the manufacturer’s
specifications and will be free from defects in workmanship and materials
for a period of one year from the date of original purchase, unless
expressly stated otherwise by Trinity, in a written format. Should your
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. Trinity will, at its option, repair
or replace on an exchange basis the defective unit, without charge for
parts or labor. When warranty service involves the exchange of the
product or of a part, the item replaced becomes Trinity property. The
replacement unit may be new or refurbished to the Trinity standard of
quality, and at Trinity’s option, the replacement may be another model of
like kind and quality. Trinity’s liability for replacement of the covered
product will not exceed the original retail selling price of the covered
product. Exchange or replacement products or parts assume the
remaining warranty period of the product covered by this limited warranty.

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TRINITY
ACCUVAR - Operational Manual
What This Warranty Does Not Cover:
This warranty does not apply to refurbished or reconditioned products.
This warranty covers only normal use in India. This warranty does not
cover damage to the Trinity product caused by parts or supplies not
manufactured, distributed or certified by Trinity. This warranty is not
transferable. This warranty does not cover third party parts, components
or peripheral devices added to the Trinity product after its shipment from
Trinity. Trinity is not responsible for warranty service should the Trinity
label or logo or the rating label or serial number be removed or should the
product fail to be properly maintained or fail to function properly as a result
of misuse, abuse, improper installation, neglect, improper shipping,
damage caused by disasters such as fire, flood, and lightning, improper
electrical current, interaction with non-Trinity products, or service other
than by a Trinity Authorized Service.
The warranty and remedy provided above are exclusive and in lieu of all
other express or implied warranties including, but not limited to, the implied
warranties of merchantability or fitness for a particular purpose. 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. Except as provided in this written warranty, neither Trinity
Energy Systems Pvt. Ltd. nor its affiliates shall be liable for any loss,
inconvenience, or damage, including direct, special, incidental, or
consequential damages, resulting from the use or inability to use the
Trinity product, whether resulting from breach of warranty or any other
legal theory.

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TRINITY
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………………………………………………………………………………...............
1.Setting Main CT Primary, Main CT Secondary, PT Ratio and Mode of control action…….
2. Setting Capacitor CT Enable, Capacitor CT Primary and Secondary and Desired PF......
3.Setting Switching, Number stages, Meter Address and Baud rate……………………….....
4. Setting operation type, Alarm Mode, Alarm Limit and Alarm Delay………………………...
5. Setting Switch Delay, Damp, Reference Bank number and Auto Phase Input Detection..
6. Setting phase Input sequence for all channels and Minimum Bank………………………..
7. Auto Sense, Setting Minimum operating Current and PF Value to Switch OFF Banks…..
Run Mode ……………………………………………………………………………………………………
Screen Displays………………………………………………………………………………………
Resetting Average PF………………………………………………………………………………..
Freezing and unfreezing the AutoScroll …………………………………………………………...
Control Outputs ……………………………………………………………………………………………...
Troubleshooting ………………………………………………………………………………………
Troubleshooting Guide ………………………………………………………………………………
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9
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ACCUVAR - Operational Manual
Introduction:
Every Power distribution system requires reliable metering of various electrical
parameters. From the electricity user's point of view, this is important for saving of
electrical energy, where-ever possible. Not only should his distribution transformer
be loaded optimally, but it should also operate at near unity power factor. The load
imbalance on the three phases should be within reasonable limits. Thus, information
like amount of loading imbalance, power factors at different times of the day, peak
loading hour etc. can be of great help in planning usage of power and also
implementing automatic switched capacitor systems to maintain power factor near
unity. 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. ACCUVAR is meant for
use in three phase four wire electrical system. It uses the three watt-meter method
to calculate KVA, KW & KVAR.
ACCUVAR is based on a powerful micro-controller. The controller receives voltage
& current signals and performs high speed measurement and calculations, typically
finishing one complete measurement cycle in less than a second.
The unit displays all parameters locally on a 128 x 64 Display. The user-friendly
keypad on the front makes programming the unit (for C.T. ratios etc.) very easy.
ACCUVAR is thus a very versatile controller and accurate information interface for
the user.

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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
•Active energy (KWh) and apparent energy (KVAh)
•Capacitor CT sensing enable/disable selection
•CT ratio for both load current and capacitor current selectable
•PT ratio is site programmable
•Capacitor current (I cap)
•Phase-Wise PF, System PF and Average integrated PF
•Autosense/Manual types of KVAr control and the capacitor bank size of every
stage display.
•Eight/twelve/fifteen stage relays controller with a one alarm selectable.
•Up to 15th Odd Harmonics and Total Harmonic Distortion (THD) for each
Voltages and Currents

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ACCUVAR - Operational Manual
Technical Specifications
Parameter
Type
Name
Statistics
Supply
Three Phase and Neutral of a 3P4W system
Voltage
Direct Voltage Input : Up to 300V L-N
Burden : 0.5VA
Current
Secondary Current Input : 5A or 1A
CT Ratio : Site Selectable
Range of Reading : 5 - 5000A
Burden : < 1.0VA
Overload : 5A CT = 6A RMS Continuous
: 1A CT = 1.2A RMS Continuous
Power Supply
Self Powered from mains. Wide operating Voltage SMPS:
80 VAC - 480 VAC, 45-65 Hz.
Relay
Switching Voltage : Max. 250 VAC
Switching Power : Max. 1000W
Expected Mechanical Life : >10 x 106switching operations.
Expected Electrical Life : >4 x 106switching operations.
@(Load = 200VA, Cos Ø = 0.5)
INPUT
OUTPUT

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ACCUVAR - Operational Manual
Measurement
Parameter
Type
Name
Statistics
Voltage
(Volts L-N: VRN,
VYN, VBN)
Accuracy : 0.5% of Reading
Current
(Amps IR, IY, IB)
Accuracy : 0.25% of Reading
Capacitor Current
CT Ratio : Site Selectable
Accuracy : 1.0% of Reading
Line Frequency
45 to 65 Hz, Accuracy : 0.3% of Reading
Active Power (P)
Accuracy : 1.0% of Reading (For IPFI>0.9)
Reactive Power (Q)
Accuracy : 1.5% of Reading
(Between 0.5 Lag to 0.8 Lead)
Apparent Power (S)
Accuracy : 1.0% of Reading
Power Factor
Accuracy : 1.0% of Reading (IPFI≥0.5)
Range of Reading : 0.05 to 1.00 Lag/Lead
Total Active Energy
(KWh)
Range of Reading : 0 to 9999999.9 KWh
Accuracy : 1.0S as per IS13779.
Total Apparent
Energy
(KVAh)
Range of Reading : 0 to 9999999.9 KVAh
Accuracy : 1.0% of Reading
Total Reactive
Energy (KVARh)
(Lag & Lead)
Accuracy : 1.5% of Reading
Range of Reading : 0 to 9999999.9
Cap. Bank KVAR
True RMS Basic Parameters
Power
Energy
Misc.

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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
10 0C to 50 0C
Weight
0.82 Kgs (Approx.)
Min. Operating Current
1% or 5% of CT primary for FIFO/SFIFO Mode
Dimensions