Trinity VAF User manual

VAF – Operational Manual
TRINITY
[1]
USER’S MANUAL
VAF
POWER METER
This document contains the latest technical information about VAF which is a micro-
controller based Power Meter. The unit is tested against the latest "MTE" Standard
Model PRS400.3 having basic accuracy of 0.02% that is traceable upto International
Standards derived using appropriate ratio techniques.
The product, VAF is sophisticated electronic equipment and, the user is advised to
read this User’s Manual carefully before attempting to install or operate the
equipment.
Published on: (mention the date of publishing)
Document Version: 1.0

VAF – Operational Manual
TRINITY
[2]
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.
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 an 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.


VAF – Operational Manual
TRINITY
[3]
Contents
Introduction ................................................................................................................4
The Main Features Available in This Model.............................................................4
Technical Specification.............................................................................................5
Technical Specification.............................................................................................5
Installation and Commissioning...............................................................................6
3P4W Mode Installation........................................................................................6
1P2W Mode Installation........................................................................................7
3P3W Mode of Installation....................................................................................8
Connection Scheme..............................................................................................9
Operational Details...................................................................................................10
Programming Mode................................................................................................10
Setting CT-Ratio..................................................................................................10
Selecting Installation Type..................................................................................11
Run Mode ...............................................................................................................12
Run Mode Displays.............................................................................................12
Resetting the Run Time......................................................................................14
Ordering Options......................................................................................................15

VAF – Operational Manual
TRINITY
[4]
Introduction
VAF is a microcontroller based power meter which measures basic parameters and
displays on a red seven segment. VAF is a host of low cost, easy to use individually
that offers for the basic measurement capabilities required to monitor electricity over
and above basic metering. In addition to 3P4W and 1P2W electrical installation, the
unit can also be installed to 3P3W electrical installation according to user’s ordering
option. The unit is able to measure parameters such as phase to phase Voltage,
individual Current and Frequency.
The entire range is very rugged and cost-effective solution. The unit is field proven
and more than 100,000 units are active in service.
The Main Features Available in This Model
True rms readings
Measurements of phase to neutral voltage (VPN), phase to phase voltage
(VPP), individual current in three phases (A) and frequency (Hz)
3P4W and 1P2W selectable
3P3W (ordering option)
Run Time display and resettable
Display with 0.4” Red Seven Segment
LED indicator for each parameter
All parameters with default accuracy class 1.0S

VAF – Operational Manual
TRINITY
[5]
Technical Specification
SR.
NO
PARAMETERS
&
OPTIONS STATISTICS
1 Volts R-N Direct Voltage Input : Up to 300V L-N
Burden : 0.5VA
Secondary Voltage Input : 63.5V*
2 Volts Y-N
3 Volts B-N
4 Volts RY Direct Voltage Input : Up to 500V L-L
Burden : 0.5VA
Secondary Voltage Input : 110V*
5 Volts YB
6 Volts BR
7 Current R Secondary Current Input : 5A or 1A (To be specified at the
time of Ordering)
CT- Primary : Site Selectable
Range of Reading : 5 – 5000A
Burden : < 1.0VA
Overload(Through CT) : 5A CT = 6A RMS Continuous
1A CT = 1.2A RMS Continuous
(Whole Current) : 120% of Imax continuous.
8 Current Y
9 Current B
10 Frequency 45 to 55 Hz, Accuracy : 0.3% of Reading
11 DISPLAY 0.4” Red Seven Segment.
12 Installation (a) 3P4W and 1P2W
(b) 3P3W (optional)
13 Bezel 96x96 mm DIN enclosure
14 Depth 55 mm
* To be specified at the time of ordering along with PT-Primary.

VAF – Operational Manual
TRINITY
[6]
Installation and Commissioning
The unit can be used only for 3P4W and 1P2W or 3P3W according to user’s
requirement for an electrical installation.
3P4W Mode Installation
To install and commission for 3P4W, proceed the following instructions:
1. Push the unit into the panel and mount using the clamps provided on it.
2. Connect the auxiliary supply (80V AC to 270V AC) to the terminals marked P
and N.
3. Connect the three phases with the phase sequence being R-Y-B to the
terminals marked U1, U2 and U3 respectively. Make sure that the phases
coming to the unit come through control fuses of 1.0A rating. This will protect
the electronic inside from damage due to severe over voltage or phase faults
in the system.
4. Connect the neutral wire to the terminal marked U4.
5. Connect the two wires from the R-phase CT to the terminals marked M1 and
L1 such that S1 from CT goes to M1. Connect the two wires from the Y-phase
CT to the terminals marked M2 and L2 such that S1 from the CT goes to M2.
Connect the two wires from the B-phase CT to the terminals marked M3 and
L3 such that S1 from the CT goes to terminal marked M3.
6. Switch on the auxiliary supply as well as three phase supply, and then the unit

VAF – Operational Manual
TRINITY
[7]
will come alive in order to display such as CT-Ratio, Installation type and
enter into Run Mode respectively.
7. Firstly, user should program the settable parameters, CT-Primary and
Installation type. (Refer Operational Details in the next section).
8. Now the unit is ready for operation.
1P2W Mode Installation
To install and commission for 1P2W, proceed the following instructions:
1. Push the unit into the panel and mount using the clamps provided on it.
2. Connect the auxiliary supply (80V AC to 270V AC) to the terminals marked P
and N.
3. Connect the single phase to the terminal marked U1. Make sure that the
phases coming to the unit come through control fuse of 1.0A rating. This will
protect the electronic inside from damage due to severe over voltage or phase
faults in the system.
4. Connect the neutral wire to the terminal marked U4.
5. Connect the two wires from the phase CT to the terminal marked M1 and L1
such that S1 from CT goes to M1.
6. Switch on the auxiliary supply as well as phase supply, and then the unit will
come alive and display such as CT- Ratio, Installation type, and then enter
into Run Mode.
7. Firstly, user should program the settable parameter; CT-Primary to give a CT
operated true result. (Refer Operational Details in the next section).
8. Now the unit is ready for operation.

VAF – Operational Manual
TRINITY
[8]
3P3W Mode of Installation
To install and commission for 3P3W, proceed the following instructions:
1. Push the unit into the panel and mount using the clamps provided on it.
2. Connect the auxiliary supply (80V AC to 270V AC) to the terminals marked P
and N.
3. Connect the three phases with the phase sequence being R-Y-B to the
terminals marked U1, U4 and U3 respectively. Make sure that the phases
coming to the unit come through control fuses of 1.0A rating. This will protect
the electronic inside from damage due to severe over voltage or phase faults
in the system.
4. Connect the two wires from the R-phase CT to the terminals marked M1 and
L1 such that S1 from CT goes to M1. Connect the two wires from the B-phase
CT to the terminals marked M3 and L3 such that S1 from the CT goes to the
terminal marked M3.
9. Switch on the auxiliary supply as well as three phases supply, and then the
unit will come alive in order to display such as CT- Ratio, Installation type, and
then enter into Run Mode.
10.Firstly, user should program the settable parameter, CT-Primary to give a CT
operated true result. (Refer Operational Details in the next section).
5. Now, the unit is ready for operation.

VAF – Operational Manual
TRINITY
[9]
Connection Scheme

VAF – Operational Manual
TRINITY
[10]
Operational Details
The Power Meter, VAF is a versatile meter, with all the features needed to
implement for a robust electrical load management system. It can be configured to
monitor electrical parameters, and is also achieved by making field programmable
parameters.
There are basically two modes of operation in VAF:
1. Programming Mode
2. Run Mode
After supplying power (80 VAC - 415 VAC), the unit displays immediately power
receiving information, CT-Ratio, Installation Type, and then by default, the display
comes into Run Mode such as shown below.
Programming Mode
Now, the unit can be operated by using key for both the Programming Mode and
Run Mode. There are two programmable parameters CT-Ratio and Installation types
which can also be operated by pressing key.
Setting CT-Ratio
The CT-Primary is settable from 5 to 5000 and, should be set so as to give actual
current values in an Electrical Installation.
To set the CT-Primary, proceed the following instruction:
1. Keep pressing key in Run Mode till the unit enters into settable CT-Ratio
with the following display.

VAF – Operational Manual
TRINITY
[11]
2. As soon as the unit enters into the above display, stop pressing the key. Now,
set CT-Ratio by pressing key again till your desired value is received.
3. If your setting is completed, stop pressing the key. The unit will therefore
return into Run Mode after 9 to 10 seconds.
Selecting Installation Type
The unit consists of both 3P4W and 1P2W for an electrical installation. However, the
unit can also be specified for 3P3W electrical installation according to user’s ordering
option.
To select the Types of Installation, proceed the following instruction.
1. Keep pressing key in Run Mode till the unit enters programmable
Installation type across the CT-Primary with the following display.
2. As soon as the unit enters the above display, stop pressing the key. Now,
select the Installation type by pressing key again.
3. If your setting is completed, stop pressing the key. The unit will therefore
return into Run Mode after 9 to 10 seconds.

VAF – Operational Manual
TRINITY
[12]
Run Mode
In the Run Mode, the various parameters calculated by the VAF are displayed on
different pages along with three lines of 0.4” Red Seven Segment. The Run Mode
displays will autoscroll by default and can also be stayed for each page by pressing
key. The parameters can therefore be analyzed one by one.
Run Mode Displays
Page 1
The LED indicator glows on VOLT which shows individual phase to neutral voltage
of R-Y-B on first row, second row and third row display respectively. (In case of
3P3W, this page is not there).
Page 2
The LED indicator glows on VPP which shows individual phase to phase voltage of
R-Y-B on first row, second row and third row display respectively.

VAF – Operational Manual
TRINITY
[13]
Page 3
The LED indicator glows on current (i.e., A) which shows the three phase currents
on first row, second row and third row.
Page 4
The LED indicator glows on VPP, A and Hz which indicate that first row, second
row and third row are showing for average voltage in phase to phase, average
current and frequency respectively.

VAF – Operational Manual
TRINITY
[14]
Page 5
The display shows the Run Time of the unit along with the format of hours and
minutes (i.e., hhhhhh.mm).
Resetting the Run Time
The Run Time of the unit can be reset. In Run Mode, press key continuously for
about 1 minute to reset the Run Time.
1P2W Run Mode Display
Page
The LED indicator glows on VPN, A and Hz which indicate that first row, second
row and third row are showing for average voltage in phase to neutral, average
current and frequency respectively.

VAF – Operational Manual
TRINITY
[15]
Ordering Options
VAF can be ordered with the following options according to user’s requirements.
VAF
Power Meter
Technical Specification Options
Installation 3P4W and 1P2W installation
3P3W installation
PT-Ratio (V
KV )
11 KV/110V
22 KV/110V
33KV/110V
66KV/110V
CT secondary
(Current) 5A
1A

VAF – Operational Manual
TRINITY
[16]
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 PRS400.3 having basic accuracy
of 0.02%, traceable upto International Standards derived using appropriate ratio
techniques.
Result of Test : …………………………………………………………………
Remarks : …………………………………………………………………
Test engineer : …………………………………………………………………
Date : …………………………………………………………………