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Transcript
Instruction Manual
PFLive & VPDLive
Power Factor/Tan Delta Testing of High Voltage Bushings and Voltage
Potential Interface for Power Transformers and Current Transformers, and
Circuit Breakers
Catalog No. 760001 Series
High-Voltage Equipment
Read the entire manual before operating.
Aparato de Alto Voltaje
Ante de operar este producto lea este manual enteramente.
On-Line Monitoring Inc.
300 National Road, Suite 400
Exton, PA 19341
(484) 875-0735
Rev. 2.1 (2/18)
PFLive & VPDLive
Power Factor/Tan Delta Testing and Voltage Potential Interface for High
Voltage Bushings On Power Transformers, Current Transformers, and
Circuit Breakers
Instruction Manual
Copyright © 2003 by On-Line Monitoring Inc. All rights reserved.
Reproduction without written permission is prohibited.
Specifications are subject to change without notice.
2
Revision History
Change Description
Date
Page(s)
01/01/03
10/03/03
All
1,15,21
Added Potential Relay Interface 2.0
10/11/04
8,21
Revised Section 6
2.0
10/11/04
Section 6
Added VPD
2.1
2/18/05
Entire Manual
Class I Release
Update logo & Images
Rev level
0
1
3
Table of Contents
Section
Page
Revision History ............................................................................... 3
Table of Contents ............................................................................. 4
List of Illustrations ........................................................................... 7
Section 1 - Introduction ................................................................ 8
1.1
Receiving Instructions............................................................................8
1.2
PFLive & VPDLive ....................................... Error! Bookmark not defined.
1.2.1
1.2.2
1.2.3
Power Factor (PF)...............................................................................9
PF and Insulation Stability...................................................................9
System Requirements.......................................................................11
Section 2 - Safety ........................................................................ 12
Section 3 - PFLive & VPDLive Hardware Installation ............... 14
3.1
Specifications........................................................................................14
3.1.1
3.1.2
3.1.3
3.2
PFLive & VPDLive Interface Cabinet ................................................14
BTC...................................................................................................15
BTC/MTU Cable................................................................................16
Installation Instructions........................................................................17
3.2.1
3.2.2
Preparations for Installation ..............................................................17
Establishing Test Points....................................................................17
3.3
Installing the BTC .................................................................................19
3.4
Installing the PFLive & VPDLive Interface Cabinet ............................20
3.4.1
AC/DC Input Signal Connections ......................................................21
Section 4 - PFLive & VPDLive Software Installation ................ 24
4.1
Installation Procedure ..........................................................................24
4.1.1
4.1.2
4.1.3
4.1.4
PCMCIA A/D Card Installation ..........................................................24
Verifying Correct PCMCIA A/D Card Installation...............................25
DAQ Drive Installation.......................................................................25
PCMCIA A/D Card Removal .............................................................25
4
4.2
PFLive & VPDLive Software Installation .............................................25
Section 5 - PFLive & VPDLive Software Setup ......................... 27
5.1
System Settings ....................................................................................27
5.2
Device Configuration ............................................................................28
5.2.1
5.2.2
5.2.3
5.2.4
Graphical User Interface Conventions ..............................................28
Substation Fields ..............................................................................29
Transformer Fields ............................................................................30
Device Fields ....................................................................................31
Section 6 - PFLive & VPDLive Operation .................................. 33
6.1
Check Channels ....................................................................................33
6.2
Sample and Store..................................................................................34
6.3
Substation Data Collection Procedure................................................35
Equipment Required .....................................................................................35
Process Steps...............................................................................................36
Section 7 - PFLive & VPDLive Diagnostics ............................... 37
7.1
Signal Graphs........................................................................................37
7.2
Instantaneous Power Factor ................................................................37
7.3
Raw Data................................................................................................38
Section 8 - Working with the Data.............................................. 40
8.1
PFLive & VPDLive Access Database...................................................40
8.1.1
8.1.2
Microsoft Access Database Tables ...................................................40
Access Database Table Structure.....................................................40
8.2
Graph Data.............................................................................................41
8.3
Export Data............................................................................................43
8.4
Delete Data ............................................................................................45
Section 9 - Maintenance ............................................................. 46
9.1
Periodic Testing ....................................................................................46
9.2
Repair.....................................................................................................46
5
Appendix A - Preliminary Installation Worksheet ....................... 47
Appendix B - OMI Software License Agreement ......................... 48
Warranty.......................................................................................... 50
6
List of Illustrations
Figure
Page
Figure 1- PFLive & VPDLive Interface Cabinet ...................................................14
Figure 2 - PFLive & VPDLive Interface Cabinet Mounting Dimensions...............15
Figure 3 - Typical BTCs ......................................................................................16
Figure 4 - Signal Cable and Shield Connections ................................................17
Figure 5 - Test Object with Test Point.................................................................18
Figure 6 - Test Point for bushings Without a Capacitive Tap ..............................19
Figure 7 - BTC Connection Diagram...................................................................20
Figure 8 - PFLive & VPDLive Schematic Diagram ..............................................21
Figure 9 - PFLive & VPDLive Installation Startup Screen ...................................24
Figure 10 - PFLive & VPDLive Installation Completion Screen...........................26
Figure 11 - System Settings Display ...................................................................27
Figure 12 - Substation Configuration Display......................................................30
Figure 13 - Transformer Configuration Display ...................................................31
Figure 14 - Device Configuration Display............................................................32
Figure 15 - Check all channels Display...............................................................33
Figure 16 - Check all channels Confirmation Display..........................................34
Figure 17 - Sample and Store Display ................................................................35
Figure 18 - Signal Graphs Diagnostic Display ....................................................37
Figure 19 - Instantaneous PF Diagnostic Display ...............................................38
Figure 20 - Raw Data Diagnostic Display ...........................................................39
Figure 21- PFLive & VPDLive Access Database Tables and Fields ...................41
Figure 22 - Access Database Graph Display ......................................................42
Figure 23 - Access Database Tabular Data Display ...........................................43
Figure 24 - Export Data Selection Display ..........................................................44
Figure 25 - Export Data to Excel Worksheet Display ..........................................45
7
Section 1 -
Introduction
1.1 Receiving Instructions
It is very important that the equipment and software items received are checked against
the packing list to ensure that all materials are present. Notify OMI Customer Service of
any shortage - telephone (484) 875-0735 or e-mail [email protected]
Please examine the equipment for damage received in transit. If any damage is
discovered, file a claim with the carrier at once and notify OMI or it’s nearest authorized
sales representative, giving a detailed description of the damage.
The system has been thoroughly tested and inspected to meet rigid specifications before
being shipped. It is ready for use when set up as indicated in this manual.
1.2 PFLive & VPDLive
PFLive & VPDLive is a low-cost, software-oriented notebook computer based Power
Factor/Tan Delta Testing System for bushings on Power and Current Transformers
without requiring an outage. The operator can connect to the PFLive and take an
instantaneous Power factor reading at rated system voltages at any time after installation
with this safe low voltage interface.
A bushing potential interface option is also available for connection to protective relays
allowing the bushing test tap to be used for power factor measurements and protection
simultaneously.
The software operates with Windows 95, 98, Me, NT4, 2000, or XP. It uses a standard
Microsoft Access 2000 database for data storage. The system consists of specially
designed hardware and software.
The PFLive & VPDLive system consists of the following hardware components:
• Bushing Tap Coupler (BTC) or Measuring Tap Unit (MTU)
• PFLive & VPDLive Interface Cabinet (3 to 16 AC/DC signals)
• PCMCIA Data Acquisition Card and interface cable.
PFLive & VPDLive can also be used as a portable entry-level system that can migrate to
an on-line monitoring capability. This unique technology is a combination of sensor
hardware and PC software. The connection point to the bushing is made via a BTC using
a unique design from OMI.
The signal from the BTC is connected to the PFLive & VPDLive Interface Cabinet
installed on or near the transformer. This cabinet contains all passive devices with no
8
input power requirements. It can be safely accessed using an OMI provided interface and
software installed on a customer provided notebook computer. The computer acquires
the necessary data to compute a snapshot of the insulation condition (Power Factor) of
the monitored devices, without the need for an equipment outage.
The software has the ability to sample up to 16 channels of DC and/or AC signals. The
software calculates voltage levels, phase shifts, and power factor values for AC signals
only. A proprietary function, based on Fast Fourier Transform algorithms, is used to
calculate very small phase shifts between signals and calculates the power factor value.
These measurement algorithms were developed by and are unique to OMI.
An optional DC input signal module will provide other sensor inputs.
1.2.1 Power Factor (PF)
The deterioration of oilpaper insulation in high-voltage (HV) equipment is a matter of
continuous concern. Normal aging of HV equipment is a slow process that takes place
over 30 to 40 years due to thermal, electrical and environmental effects. Premature failure
on the other hand is often a relatively sudden process that is not anticipated by periodic
off-line tests. This prompted the need for periodic insulation condition testing to manage
the risk factor and to initiate maintenance procedures based on the condition of the
insulation.
The power factor (PF) calculation in PFLive & VPDLive is based on the conventional
Schering Bridge used in laboratories. Data is acquired under software control from
transducers connected to the test objects associated with a transformer and then the data
is compared to data from another electrical phase to produce a power factor value.
1.2.2 PF and Insulation Stability
The eventual breakdown of insulation is a rapid avalanche of failing dielectric layers.
Damaged or deteriorated dielectric is associated with:
• Increased dielectric losses (I2R) with other sources of heating may eventually fuel
a mechanism of thermal runaway. PF is a measure of dielectric losses.
• Partial discharges and treeing. High levels of partial discharge are reflected in the
PF and are usually only present just after lightning or switching impulses and just
before and during insulation failure.
• Increased sensitivity to changes in temperature, humidity, and moisture (i.e.,
increased temperature coefficient). Sources of heating include dielectric losses,
ambient temperature, and more significantly, load fluctuations.
The concept of measuring PF is based on the derivation of the phase shift between two
voltage signals. The method is similar to the standard bridge methods, but software is
used for angle difference determination. The measurement of PF of insulation is accepted
as part of well-established laboratory testing procedures to determine the quality of
insulation at the factory before commissioning new and refurbished HV equipment. PF as
9
a parameter is by nature a relatively slow-changing value and is an integral characteristic
depending on:
• Design, materials and production technology
• Operating voltages and temperatures
• Aging of insulation related to design and operating conditions such as overvoltages, loading conditions, etc.
• Climatic/Weather related Phenomenon
The system calculates the PF of a unit as a relative value compared with a reference
voltage from another device that is in service, thereby eliminating the need for a standard
capacitor. The reference device does not have to be associated with the same phase since
PFLive & VPDLive will automatically make the proper phase angle adjustments.
Relative measurements and evaluation can reduce the affect of influences such as
ambient temperature, operating voltages, loading conditions, different aging
characteristics, different designs, operating conditions, etc.
The software permits entering the nameplate PF values for each sample under test. Using
this value, the PF is normalized to a PF result, which is comparable to an off-line test
value.
1.3 Voltage Potential Interface Application
VPDLive, The Voltage Potential Device Live, is a modern version of the large bulky
bushing potential devices designed to energize electro-mechanical under-voltage relays.
With the advent of today's’ digital relays, the load requirements on these devices is much
lower. Digital relay power input requirements are as low as 0.5 VA on some models.
The VPDLive connects to the transformer via the bushing test tap with On-Line
Monitoring’s Bushing Tap Coupler (BTC). Based on the power and voltage
requirements of protective relays, the VPDLive is designed to provide a constant voltage
output for Under-voltage, under –frequency and/or over-voltage monitoring of
transmission line voltages on primary and secondary transformer bushings. The VPD
live is suitable for single phase and three phase applications.
Monitoring primary voltages is a key element of a power delivery system. In view of the
recent blackouts as a result of a cascading power outages, several regulating authorities
are now requiring Under-voltage Relays on all power transformers. The VPDLive
provides the utility engineer with a low cost, easy to install interface on high voltage
transformer mounted bushings. This interface provides a constant 115V input to Undervoltage Relays for high side voltage monitoring. In the past, high consumption
electromechanical relays were powered by large single-phase voltage potential devices.
Modern digital relays have lower power requirements, making the old fashioned voltage
potential devices an overkill in cost, manpower, and hardware. Using the old fashioned
voltage potential devices would require the user to put in three of these units.
10
The On-Line Monitoring Inc. VPDLive is a low-powered single or three-phase device,
fully capable of providing the power requirements for modern digital protective relays.
1.4 System Requirements
The PFLive & VPDLive software executes on a notebook computer, with the following
minimum requirements:
• Windows 95, 98, ME, NT, 2000, or XP
• Pentium II 233 MHz processor
• CD Rom Drive
• 64 MB RAM
• 50 MB Hard drive space available for data storage
• 1 available Class 1 PCMCIA slot
11
Section 2 -
Safety
The devices to which this system is connected are a possible source of HV electrical
energy and all persons making or assisting in tests must use all practical safety
precautions to prevent contact with energized parts of the test equipment and related
circuits. Persons actually engaged in the test must stand clear of all parts of the complete
high-voltage circuit, including all connections, unless the test set is de-energized and all
parts of the test circuit are grounded. Persons not directly involved with the work must be
kept away from test activities by suitable barriers, barricades, or warnings.
Treat all terminals of HV power equipment as a potential electric shock hazard. There is
always the possibility of voltages being induced at these terminals because of proximity to
energized HV lines or equipment. Always disconnect test leads from power equipment
before attempting to disconnect them at the system. The ground connection must be the first
made and the last removed.
Safety is the responsibility of the user.
Misuse of this HV equipment can be extremely dangerous.
The purpose of this system is limited to use as described in this manual. Do not use the
system or its accessories with any device other than specifically described.
Never install the system to energized equipment.
Do not use the system in an explosive atmosphere.
Qualified personnel who are familiar with the construction and operation of the system
and the hazards involved must only perform corrective maintenance.
Refer to IEEE 510 - 1983, "IEEE Recommended Practices for Safety in High-Voltage
and High-Power Testing," for additional information.
If the test equipment is operated properly and all grounds correctly made, test personnel
need not wear rubber gloves. As a routine safety procedure, however, some users require
that rubber gloves be worn, not only when making connections to the HV terminals, but also
when manipulating the controls. OMI considers this an excellent safety practice.
Users of equipment should note that HV discharges and other sources of strong electric or
magnetic field might interfere with the proper functioning of heart pacemakers. Persons with
heart pacemakers should obtain expert advice on the possible risks before operating this
equipment or being close to the equipment during operation.
12
Warning and caution notices are used throughout this manual where applicable and should
be strictly observed. These notices appear in the format shown below and are defined as
follows:
WARNING
Warning, as used in this manual, is defined as a condition or practice that could result in
personal injury or loss of life.
CAUTION
Caution, as used in this manual, is defined as a condition or practice that could result in
damage to or destruction of the equipment or apparatus under test.
13
Section 3 -
PFLive & VPDLive Hardware Installation
3.1 Specifications
3.1.1 PFLive & VPDLive Interface Cabinet
The PFLive & VPDLive Interface Cabinet shown in the following figure is the central
signal input station, the function of which is to condition the signal for acquisition and to
provide electrical protection and isolation. The capacitance rating of the Interface Cabinet
must be chosen so that it is tuned to the capacitance of the bushings or CTs being
monitored.
Figure 1- PFLive & VPDLive Interface Cabinet
Signal inputs:
Number of input channels:
Input impedance:
Signal input mode:
Maximum full scale voltage:
Nominal voltage:
Isolation between inputs:
Surge withstand capabilities:
DC Input Module Inputs
3 AC Min or 16 AC/ DC Max
50 Ω (< 1 kHz)
Differential
± 60 V rms
40 V rms
3000 V
ANSI/IEE C37.90.1-1989 IEC 254
+ 10Vdc or ac, 0-1mA, 4-20mA dc
14
Dimensions:
11.5 in. tall x 8 in. wide x 7 in. deep;
Figure 2 - PFLive & VPDLive Interface Cabinet Mounting Dimensions
Environmental:
BTC and Interface Cabinet: -40°C to +65°C, 0 to 95 % humidity noncondensing
3.1.2 BTC
15
A BTC (Figure 3) is used in conjunction with a capacitive divider circuit in the PFLive &
VPDLive Interface Cabinet to produce a measurable signal from the test object (CT or
bushing). BTCs are essentially capacitive transducers with protection and signal
conditioning, clipping voltages to 90 V (Peak to Peak) and limiting continuous voltage to
±60 V RMS. Each BTC and PFLive & VPDLive Interface Cabinet are configured and
supplied with a specific designation to a test object in the substation so that it is tuned to
the capacitance of the bushing or CT. The BTC circuit is contained in a watertight
container, complying with NEMA type-4 protection classification.
Dimensions and Weight:
BTC
Varies depending on the bushing type and manufacturer.
The BTC mounting varies depending on the type of CT or bushing to be monitored. Refer
to sections 3.2, 3.3 and 3.4 for mounting instructions.
Figure 3 - Typical PF Sensors: MTU, IEEE Type A BTC, and Custom BTC
3.1.3 BTC/MTU Cable
Single Twisted Pair (STP) signal cable is used for all signal transmission from the BTC
to the PFLive & VPDLive Interface Cabinet. A fifty (50) foot cable is provided for each
BTC/MTU. However, cable may be up to a maximum of 1000 feet in length. The cable
specifications are:
Single STP: rated for 2 kV AC insulation levels (Belden 1039A or equivalent).
Minimum shield/drain gauge > 0.7 mm2
Minimum core gauge > 0.7 mm2
Individual and overall STP bundles with several individually shielded pairs in
each.
Overall shielding with drain wire.
Minimum drain wire gauge > 1.0 mm2
16
3.2 Installation Instructions
Before starting the installation, it is important to understand the overall system layout and
cable and shield connections. Read and understand Section 2, Safety, before installing the
system. The following figure shows the signal cable and shield connections.
Figure 4 - Signal Cable and Shield Connections
The terminal block is labeled Channel 1 (A phase), Channel 2 (B Phase), and Channel 3
(C Phase). They are also labeled +, -, and SH for the Positive, Negative, and Shield
connections from the BTC cable (provided).
3.2.1 Preparations for Installation
Complete a preliminary installation checklist, provided in Appendix A. Preparations
should include the following configuration documentation:
•
•
•
Installation schedule
Cable layout and length
Channel allocation for hardware installation and software configuration
3.2.2 Establishing Test Points
The last foil of the capacitive graded HV equipment (bushings for Transformers and
Current Transformers) is the test point (otherwise referred to as measurement or
capacitive tap point). This is either brought out as a test point or it is connected internally
17
to the base metal of the unit. The following scenarios exist for units with and without a
capacitive test point:
For test objects with a capacitive test point: On a bushing, a test point may be
available under a removable cap which otherwise grounds the test point. In this case a
Bushing Tap Coupler is needed for the test point that houses the measuring circuitry as
shown in Figure 5.
Some CT Bushings have a test point available in the secondary box, where a link
connects it to the base of the unit. This link should be removed to provide a test point.
Figure 5 - Test Object with Test Point
For test objects without capacitive test point: In the case of CT bushings where no
capacitive tap is available, isolate the CT bushing base from substation earth. This
configuration requires careful attention as it impacts on the equipment isolation and
substation protection circuitry. Each configuration is specific to the bushing and
equipment support frame design, but the approach is the same. Figure 6 shows the basic
requirement. The base of the CT bushing becomes the test point.
18
Figure 6 - Test Point for bushings Without a Capacitive Tap
The maximum insulation level should be approximately 10 kV to comply with the
insulation requirements of the secondary windings and substation protection circuitry. It
is important to incorporate voltage surge and flashover fault current protection.
Disconnect the sheath in which the secondary cables of the bushing are protected from
the secondary box, since it is usually connected to ground elsewhere and would otherwise
affect the isolation of the bushing base.
3.3 Installing the BTC
WARNING
There is always the possibility of voltages being induced at the terminals of a test object
because of proximity to energized high-voltage lines or equipment. A residual static
voltage charge may also be present at these terminals. Ground each terminal to be tested
with a safety ground stick, then install safety ground jumpers, before making or checking
connections.
The BTC is coupled mechanically and electrically to the tap-point of each test object via
an appropriate adapter bolted or threaded onto the bushing. The BTC is placed physically
close to the test point to secure a safe signal voltage through adequate voltage division
and protection. See the following figure.
19
Figure 7 - BTC Connection Diagram
CAUTION
The screen drain of each twisted pair must not be grounded to substation earth at the BTC
or test object. The only point to which the individual STP screen drain is connected to
earth is via the terminal blocks in the Interface Cabinet
3.4 Installing the PFLive & VPDLive Interface Cabinet
Together with the BTC, the capacitor divider circuit in the PFLive & VPDLive Interface
Cabinet transforms the voltage across the Test Tap to a voltage signal of approximately
40 V rms. The STP cable from the BTC is connected to the input terminals in the PFLive
& VPDLive Interface Cabinet (see Figure 4). The Interface Cabinet must be mounted low
enough that test personnel can attach the Acquisition Cable from the notebook computer,
yet close enough to the test object base or support frame to afford a short connection to
the BTC assigned to this Interface Cabinet. The Interface Cabinet must be solidly
connected to substation earth.
Each combination of BTC and PFLive & VPDLive Interface Cabinet is manufactured
and supplied to correspond to a designated test object. The preliminary installation
checklist (Appendix A) asks for the capacitance values of each test object so the divider
capacitance rating of the PFLive & VPDLive Interface Cabinet can be selected before
installation. A schematic representation of the connection from the bushing test tap (C1)
with the BTC to the PFLive interface cabinet is shown below.
20
VPDLive Wiring Diagram
Rated Voltage
Bushing Test
Tap
Bushing
Bushing Tap
Coupler
C1
VPDLive Cabinet
C2
CV1
SG1
Relay Connection/Voltage Output
(High Side)
F1
L1
C V2
SG2
T1
SG = Spark Gap for
Over-voltage
Protection
Optional
A/D Converter
module
&
Laptop for Power
Factor
Measurements
Relay Connection/Voltage Output
(Low Side)
Figure 8 - PFLive & VPDLive & VPD Live Schematic Diagram
3.4.1 AC/DC Input Signal Connections
WARNING
There is always the possibility of voltages being induced at the terminals of a test
specimen because of proximity to energized high-voltage lines or equipment. A residual
static voltage charge may also be present at these terminals. Ground each terminal to be
tested with a safety ground stick, then install safety ground jumpers, before making or
checking connections. Ensure that the object to be tested is completely de-energized and
discharged.
The Installation Checklist (Appendix A) requires the capacitance values of each test
object so the divider capacitance rating of the PFLive & VPDLive Plus Cabinet can be
selected before installation.
Together with the BTC, the capacitor divider circuit in the PFLive & VPDLive Plus
Cabinet transforms the voltage across the Test Tap to a voltage signal of approximately
40 V rms. The STP cable from the BTC is connected to the input terminals in the PFLive
& VPDLive Plus Cabinet.
Each AC Input board in the PFLive & VPDLive cabinet can handle up to three AC input
signals from the bushing tap couplers. The terminal block on the AC Input board has nine
connection posts. Each STP from a BTC will use a set of three consecutive connections
on the terminal block. The first input on this AC Input board will use the right set of three
posts on the terminal block, the second input will use the middle set of three posts, and
the third input will use the left set of three posts. The right most connector of each set of
three connectors on the nine post terminal block is for the (+) positive signal, the middle
21
connector is for the ground connection, and the left connector is for the shield connection
in the STP. The following figure illustrates the terminal block on the AC Input board.
Figure 9 - Terminal Block on AC Input Board
The DC Input board uses the same type of terminal block with nine connector posts. The
right most connection is for DC channel 1 and up to eight DC channels can be monitored.
The ninth connection on the terminal block is for the ground input.
22
Figure 10 – Bushing Potential Connection Terminal Block (Optional)
Figure 10 shows the bushing potential terminal block for connecting a protective relay or
other device for monitoring voltages from the bushing test tap. This interface provides a 3
phase connection rated at 115V rms + 2%. Other voltage ratings may be specified at time
of order.
Connect each phase to the appropriately labeled Line (L) and Neutral (N) connection on
the terminal block for each phase. Input connections are limited to 1VA max. Pins 11
(N) & 12 (L) are for A Phase, 6(N) & 8(L) for B Phase, and 1(N) & 2(L) for C phase.
23
Section 4 -
PFLive & VPDLive Software Installation
4.1 Installation Procedure
The PFLive & VPDLive CD is part of the equipment received and contains all the
software to be installed on your notebook computer. Inserting the CD in the drive should
display the following screen or you can run “Installation.exe” in the root folder on the
CD.
Figure 11 - PFLive & VPDLive Installation Startup Screen
4.1.1 PCMCIA A/D Card Installation
Insert the OMI Data Acquisition Card in an empty PCMCIA slot. Windows should detect
the new hardware and execute the Add New Hardware wizard. If it asks where to search
for the best driver, enter the CDROM Drive designation letter and depress the “Next”
button to complete the PCMCIA A/D hardware installation.
Instruction for installing the PCMCIA A/D Card and checking to make sure it was
correctly installed can also be obtained from the PFLive & VPDLive Installation menu
by selecting Step 1 PCMCIA A/D Card Installation.
24
4.1.2 Verifying Correct PCMCIA A/D Card Installation
After the PCMCIA A/D Card has been installed, follow the following procedures:
• Click on the My Computer icon
• Click on the Properties
• Click on the Hardware tab
• Click on the Device Manager tab.
• Click on View and select devices by type
• Cick on the Data Acquisition icon and the device should be shown.
• Double click on the device and verify that the device is working properly and
there are no conflicts with other resources. If there are conflicts, then IRQ or I/O
assignments with the conflicting device will have to be changed.
4.1.3 DAQ Drive Installation
After installing the PCMCIA A/D Card, Step 4 only has to be selected if the PFLive &
VPDLive system is being installed on a Windows NT Operating System.
4.1.4 PCMCIA A/D Card Removal
If for some reason it is desired to remove the PCMCIA A/D Card from the PCMCIA slot
the following procedure must be followed. On the bottom right of the screen, select the
“Unplug or Eject Hardware” icon and then select the Stop PCMCIA A/D Card item. A
message will appear when it is safe to remove the PCMCIA A/D Card.
An alternate procedure is to double click on the PCMCIA icon in the Control Panel and
then select the PCMCIA A/D socket and click on the “Stop” button. A message will
appear when it is safe to remove the PCMCIA A/D card.
The next time the PCMCIA A/D Card is reinstalled, Windows will detect its’ presence
and active the device with no additional action required by the user.
4.2 PFLive & VPDLive Software Installation
If you are installing PFLive & VPDLive on a Windows 95 or NT Operating System,
select Step 2 HTML Help Installation so the installation program can determine if the
software required by the Help system is installed and is the correct version.
Select Step 3 PFLive & VPDLive Software Installation with your mouse. If another
folder is not selected, the software is installed in the C:\Program Files\AVO\PFLive &
VPDLive folder. A status bar will indicate the progress of the installation and after it
25
indicates 100 percent, wait until the following screen appears and then click on the
“Finish” button.
Figure 12 - PFLive & VPDLive Installation Completion Screen
26
Section 5 -
PFLive & VPDLive Software Setup
The System Settings and Device Configuration must be entered before bushing testing
can be performed. Select the “Configuration” item on the menu bar, and then select the
“System Settings” menu item.
5.1 System Settings
The following System Setting display shows the parameters that can be changed. Default
values are given and they should be checked to make sure they are acceptable. It is
recommended that the same settings be used in testing all bushings so that data samples
will be consistent from bushing to bushing.
Figure 13 - System Settings Display
Data Acquisition Device – OMI PCMCIA 100 kHz PCMCIA A/D
System Frequency – Specify the operating frequency of the devices.
Sampling Rate - Specify the sampling rate in Hz (samples per second). The default
setting is 50 kHz. This setting can be lowered if the waveforms viewed by selecting the
Signal Graphs tab (section 7.1) appear choppy. This usually occurs with a slow pc.
Increasing the sample rate increases resolution and the size of the data file that the
readings are stored in.
27
Number of Cycles - Specify the number of cycles to sample per single reading. The data
captured will be processed to produce RMS and mean voltages, and PF values are
calculated. A minimum of 2 cycles are required to determine Power Factor. More cycles
will take longer to calculate but will provide better resolution.
Number of Readings to Average - Specify how many readings (RMS, mean, PF values)
should be taken before calculating averages and storing the data to the database. The
default value is 10. Increasing this value will take longer to calculate, but will provide a
more stable average. Lowering the value is not recommended as an inconsistent average
of data will occur with a smaller sample of data.
Number of Average Records per Session - Specify how many data records (i.e.
averages) to collect per device per acquisition session. For example, collect 10 averages
for every configured device at a time, with each acquisition scan.
Click the bottom-left icon to launch AVO's DAQDRIVE Configuration Utility. It is very
important that this utility is executed before trying to sample any data. After the
configuration utility has started, verify that 16 channels (0 to 15) are available and then
click File-Save and exit the utility. Never rename or delete the ".dat" configuration
file.
The numbers of raw samples per cycle and the approximate time to scan sixteen channels
are computed for the user’s reference. When you exit the System Settings you are
required to confirm that the new settings should be saved.
5.2 Device Configuration
All Substation, Transformer, and Device configuration information is entered by clicking
the “Configuration” item on the menu bar and then select the Device Configuration menu
item. The information for Substations, Transformers and Devices are selectable by three
tabs. Since there is a hierarchical relationship between Substations, Transformers, and
Devices, you must click on the Substations tab first and then highlight the desired
substation before clicking on the Transformers tab to view transformers configured for
the selected substation. Then highlight the desired transformer and click the Devices tab
to view all the devices configured for the selected transformer.
5.2.1 Graphical User Interface Conventions
The following user interface conventions are used:
•
The data in any field can be sorted by clicking on the header for the desired field.
•
All columns can be resized by dragging the edge of the column header to the left
or right.
•
Highlighting a device in the list will display the Device Detail information on the
bottom section of the display.
28
•
All fields that require data to be entered have their associated legend in red and
the optional data have their associated legend in black.
•
Double clicking a Device will enable it to be edited or deleted. After doubleclicking a device, the user can make changes to the information displayed on the
bottom section of the screen and click the “Save” button to save the changes to
the database. Clicking Delete will delete the item from the database. To cancel
any changes being made, just click the “Cancel” button.
•
To add a device, click the “New” button, entered all relevant information and
click the “Save” button to save the information to the database.
•
To resize the window to fit onto your available screen space, left-click and drag
the bottom-right hand corner.
•
To resize the detail panel drag the splitter (gray horizontal line) between the list
and detail panels.
•
The substation name and transformer name must be unique in the system.
5.2.2 Substation Fields
The following display shows information for a new substation SS2 being added prior to
clicking the “Save” button. A unique Name for the substation must be entered. A more
detailed Description is optional.
29
Figure 14 - Substation Configuration Display
5.2.3 Transformer Fields
The following display shows a new transformer being added before clicking the “Save”
button. A unique Name for the transformer must be entered. A more detailed
Description is optional. Also specify the Number of Channels in the PFLive &
VPDLive Interface Cabinet connected to this transformer.
30
Figure 15 - Transformer Configuration Display
5.2.4 Device Fields
The information associated with a device is as follows:
Type: Specify if this device is used for power factor values (i.e. a CT or bushing device),
or for level values (i.e. another IED). Note that an AC signal input is required for PF
devices and a DC signal for Level devices.
Phase: Specify the phase (A, B or C) of the device signal.
Channel: Specify the channel to which the signal is connected in the PFLive & VPDLive
Interface Cabinet (1-16).
In Service: Only device in service will be sampled. This allows you to configure devices
that will be activated later.
Description: Enter a short description of the device. The description should enable you to
uniquely identify this device.
Manufacturer, Serial number and Feeder information can also be entered, but is
optional.
The following display shows a new device being added before clicking the “Save”
button.
31
Figure 16 - Device Configuration Display
Level devices are other Intelligent Electronic Devices (IEDs) that are connected to the
Interface Cabinet and can be sampled by PFLive & VPDLive. The measured DC voltage
will be scaled according to the information provided:
Units of Measure: Specify the unit of measurement for the device, e.g. PPM, Degrees F,
%, etc.
Lower Voltage / Value: The minimum voltage and its’ corresponding scaled value.
Upper Voltage / Value: The maximum voltage and its’ corresponding scaled value.
32
Section 6 -
PFLive & VPDLive Operation
Before trying to acquire any data samples, make sure that the PCMCIA data acquisition
card (PCMCIA A/D) is properly installed in the PCMCIA slot of the notebook computer
and that the signal cable is securely connected between the PCMCIA A/D card and the
PFLive & VPDLive Interface Cabinet.
6.1 Check Channels
The PFLive & VPDLive Interface Cabinet should be opened and the transformer
associated with this cabinet identified. The other end of the signal cable from the
notebook computer should be attached to the D37 connector in the Interface Cabinet.
Select the correct substation and transformer for which sample data should be
acquired and the click on the icon on the display that is shown at the left. PFLive
& VPDLive will check the channels, and display the status of all the channels
connected to the PFLive & VPDLive Interface Cabinet.
Figure 17 - Check all channels Display
In Figure 16, the check all channels display shows the channel # with a green led
showing that there is a signal present on that channel., or a red led showing that there is
no signal present.
33
The type of device is shown in the next column as a level Device or DC sensor, or a PF
device (bushing). The Description column displays OK if the signal is in range (between
1 and 7.5 Volts). A list of error messages are shown in the table below:
•
•
•
•
•
Signal found on this channel but no device configured for it.
AC signal found on this channel but configured for a level device (DC
Signal).
DC signal found on this channel but configured for a bushing / CT device
(AC signal).
No signal found on this channel.
Level signal voltage out of range (Less tan 1 volt, or greater than 7.5V).
If the signals match the configuration, the user will be asked to continue performing the
Sample and Store operation for all of the configured devices as shown on the following
display. PF device sampling requires an AC signal, while level device sampling requires
a DC signal.
The RMS (V) column in Figure 16 lists the RMS voltage of the monitored device. The
Mean (V) is the DC value of the device being monitored.
If a signal out of range message appears, it means that the signal from the bushing is too
high, and must be corrected. The acceptable voltage should be between VRMS and
VRMS
Figure 18 - Check all channels Confirmation Display
6.2 Sample and Store
After all channels have been checked, the user can sample all the configured devices for
the selected transformer by clicking the “Yes” button on the Confirm display. Sampling
will be performed as indicated by the System Setting parameters. After the required
number of reading for each device is completed, an average calculation is performed and
a data record is stored to the database. An audible sound is used to indicate the start of
each averaging interval and the acquisition progress is shown in the following display.
34
Figure 19 - Sample and Store Display
PFLive & VPDLive will acquire the required number of samples, and calculate and store
the following values for all channels that are In Service when the “Data Acquisition”
button is clicked:
•
•
•
•
RMS of the voltage signal
Mean of the voltage signal
Power Factor between the signal and the reference signal (adjusted if a Off-Line
PF value was specified)
Calculated Level Value - calculated from the average voltage measured
6.3 Substation Data Collection Procedure
Equipment Required
A Notebook Computer with a PCMCIA Data Acquisition Card and associated Signal
Cable attached, and PFLive & VPDLive software installed. The battery should be fully
charged.
A semi-rigid insulated non-slip protective pad, the same size as the Notebook Computer.
35
Process Steps
1. Release the door latches on the PFLive & VPDLive Interface Cabinet, and open
the door so that it is at a right angle to the cabinet.
2. Place the protective pad and notebook computer on top of the PFLive & VPDLive
Interface Cabinet case and door, and attach the Signal Cable to the D37 connector
inside the PFLive & VPDLive Interface Cabinet.
3. Turn the computer ON and position the Cursor Arrow so it is on the
PFLive & VPDLive Icon and the double click the left mouse button.
4. Select the substation and transformer
using the Substations and
Transformers pull-down selection
boxes in the Select Configuration
section of the PFLive & VPDLive
display.
5. Position the Cursor Arrow so it is on the button in the Data Acquisition
section of the PFLive & VPDLive display and click the left mouse
button.
6. When the Confirm message box appears, position the Cursor Arrow on the Yes
button and click the left mouse button to start the data sampling sequence.
7. When the sampling sequence status in the Data Acquisition section of the display
indicates, “All done”, exit the program by positioning the Cursor Arrow on the x
button in the upper right corner of the PFLive & VPDLive Display and click the
left mouse button.
8.
Remove the Signal Cable from the D37 connector and shutdown the Notebook
Computer. Close and secure the door latches on the PFLive & VPDLive Interface
Cabinet.
36
Section 7 -
PFLive & VPDLive Diagnostics
7.1 Signal Graphs
This is a diagnostics utility that allows you to sample the number of cycles as per the
System Settings and plot the acquired voltage values when the “Sample and chart” button
is clicked. Either all channels or only the configured devices can be selected for sampling
and graphing as shown in the following display.
Figure 20 - Signal Graphs Diagnostic Display
7.2 Instantaneous Power Factor
This function provides the user the ability to calculate an instantaneous power factor
measurement for a specified device. Power factor measurements are relative to another
device, and will be influenced by environmental conditions, load changes, the condition
of the reference device, fluctuations in the phase angles, etc.
To use this diagnostic tool, highlight only one device before clicking the “Sample and
calculate” button. The reference device for the selected device will automatically be
selected and displayed.
The measured power factor, as well as any specified off-line and calculated offset, values
are displayed. A diagram displays the signal in vector format, indicating the capacitive
37
and resistive components of the signal, relative to the reference device signal. The Power
Factor [cos(theta)] calculation is performed and displayed.
Figure 21 - Instantaneous PF Diagnostic Display
7.3 Raw Data
This is another signal diagnostic utility that allows the user to sample a number of cycles
(as per the System Settings) and store the raw data (the voltage readings acquired) to a
Microsoft Access database table called RawData. Only data for the selected device will
be acquired when the “Sample selected devices and store raw data to database” button is
clicked. The storing of the sampled data to the database can take some time because of
the quantity of the samples collected. If additional devices are selected and sampled, this
data will be added to the RawData Table.
38
Figure 22 - Raw Data Diagnostic Display
The data is stored in the following format:
• Device_ID: The internally assigned ID of the selected device (unique per device)
• DateTimeStamp: The date and time of the measurement
• VoltageReading: The analog voltage reading from the data acquisition device
39
Section 8 -
Working with the Data
8.1 PFLive & VPDLive Access Database
PFLive & VPDLive stores all data in a standard Microsoft Access database file called
"pflive.mdb” which can be found in the same folder in which PFLive & VPDLive was
installed. This allows the user to use Microsoft Access to view data, create reports or to
export data to a special format. It is strongly recommended that periodic backup of this
database be done to avoid the lost of historical acquisition data. This backup operation
can be performed using the Copy function of Windows Explorer to make a copy of the
“pflive.mdb” on another media not residing on the notebook computer. Based on the size
of this file, it could be stored on a diskette. If the notebook computer can be attached to a
network, then the file can be copied to a server or writeable CD. Remember that the
“pflive.mdb” file resides in the same folder where the program was installed.
8.1.1 Microsoft Access Database Tables
PFLive & VPDLive uses the following tables in the Access database:
• Substations: contains configuration information for all substations
• Transformers: contains configuration information for all transformers
• Devices: contains configuration information for all devices
• Calibration: contains referencing information for all devices
• Settings: contains the System scanning parameters
• SamplingData: contains device identifiers and all sampled data (rms, mean, PF,
RelCap, level, etc. values)
• RawData: Contains device raw data for analysis by the user. This raw data is only
stored when the user uses the Raw Data utility and not during normal data
collection
WARNING
The Table Structure of the Microsoft Access database file “pflive.mdb” should not be
altered since PFLive & VPDLive requires this structure to operate correctly. A copy
of this database should be used if analysis of the data is to be performed.
8.1.2 Access Database Table Structure
The following figure graphically shows the fields in the PFLive & VPDLive Access
Database.
40
Figure 23- PFLive & VPDLive Access Database Tables and Fields
8.2 Graph Data
When the “Data” item on the menu bar is clicked and the Graphs menu item is selected,
the data in the Access database can be displayed in graph format.
Select the substation (or ALL), then select the transformer (or ALL) associated with the
selected substation and then select the device(s) for which to retrieve data. Select a device
by clicking a device from the list. More than one device can be selected by holding down
the Ctrl key while clicking other devices. Holding down the Shift key while clicking a
device will select all devices between the first selected device and the one being clicked.
The Date Range box allows the user to specify a date range for which data must be
displayed. By clicking the down arrow on a date selection box, a calendar will be
displayed from which the user can select a date. Data will only be retrieved for the
specified date range.
41
After the desired devices and date range has been selected, click the “Retrieve data”
button to obtain the data in the Access database. A sample display is shown in the
following figure.
Figure 24 - Access Database Graph Display
Various data can be displayed by selecting one of the four format tabs on the graph
display:
• PF Values (in percentage) are plotted against time
• The RMS voltages for the PF Devices are plotted against time
• The Level Device Values are plotted against time
• A tabular representation of the data including the Date/Time stamp
To zoom into an area of the graphs, click at the top-left corner of the area and while
holding down the left mouse button, drag a rectangle to the bottom-right around the area,
and release the mouse button again. To zoom out again click the bottom-right corner and
drag a rectangle to the top-left.
To scroll the graph, right click and drag the mouse while holding down the right mouse
button.
The retrieved data can also be shown in tabular format by selecting the “Data” tab.
42
To sort the data in any column, click the column header. To resize a column, drag the
header border to the left or right. The following figure is a display in the tabular format.
Figure 25 - Access Database Tabular Data Display
8.3 Export Data
Clicking on the Export menu item allows the selected data to be placed in a file for use by
other programs. Selection of the desired Devices and date range is identical to the
procedure use in displaying Graph Data. Various Export Options are available to
determine the format of the data in the export file. The user can specify if the field
headers should be included in the text file (as the first line) and if the data exported to the
text file is comma, tab or tilde (~) delimited.
After selecting whether the header is desired and what delimiter should be used, the fields
to be exported must be selected. Only the Access Database fields that have marked with a
check will be placed in the exported text file.
When this has been completed, click the “Export Now” button in the bottom-left corner
of the screen. Note that this button will only be enabled after at least one device has been
selected. The folder and file name to be assigned to the Export file must be entered. After
43
the file has been generated, a message block is displayed indicting how many records
were exported. The following display illustrates the Export function.
Figure 26 - Export Data Selection Display
The following display shows importing of the “test.csv” file from the previous example
into an Excel worksheet that can now be altered for presentation or further manipulation.
44
Figure 27 - Export Data to Excel Worksheet Display
8.4 Delete Data
The last menu item associated with the “Data” button on the menu bar is Delete Data.
Caution should be taken when using this function so that configuration or sampling data
is not inadvertently erased. Either the Configuration Data or Sampling Data can be
deleted.
Deleting the Sampling Data will erase all records in the SamplingData and RawData
tables in the “pflive.mdb” Microsoft Access Database.
Deleting the Configuration Data will erase all records in all the tables contained in the
“pflive.mdb” Microsoft Access Database except the Settings table that is not affected.
45
Section 9 -
Maintenance
9.1 Periodic Testing
WARNING
There is always the possibility of voltages being induced at the terminals of a test
specimen because of proximity to energized high-voltage lines or equipment. A residual
static voltage charge may also be present at these terminals. Ground each terminal to be
tested with a safety ground stick, then install safety ground jumpers, before making or
checking connections.
The PFLive & VPDLive Data Acquisition function performs a check of all channels
attached to the PFLive & VPDLive Interface Cabinet. If the display shows that an input
signal is bad, the Signal Graphs diagnostic utility can be used to verify overall signal
integrity, as well as to troubleshoot a signal that is down (please refer to section 7.1 of
this manual for instructions).
To troubleshoot a signal that is down, proceed with these steps:
•
•
•
Select the Signal Graphs diagnostic utilities (section 7.1. Enter the channel
number of each channel that is down (two channels can be compared for phase
relationship and signal integrity).
If a signal is deformed or missing, begin tracing the signal in the PFLive &
VPDLive Interface Cabinet. Measure the input channel and compare its amplitude
to its other two phases. The amplitudes should be within 15 percent of each other.
If not within 15 percent, check wire connections at the PFLive & VPDLive
Interface Cabinet and follow the wiring to the BTC connection.. Ensure that the
wire is not nicked or frayed. Examine the BTC to make sure it is sealed properly.
Check the terminals for tightness and verify that the shield is properly connected
between each wire in the BTC.
9.2 Repair
OMI offers a complete repair service and recommends that its customers take advantage
of this service in the event of any equipment malfunction. Equipment returned for repair
must be shipped prepaid and insured and marked for the attention of the Repair
Department. Please indicate all pertinent information, including problem symptoms and
attempted repairs. The serial number and catalog number of the system should also be
specified. Our shipping address is:
OMI
300 National Road, Suite 400
Exton, PA 19341
46
Appendix A - Preliminary Installation Worksheet
Complete one worksheet for each set of three units monitored and then use this data to
determine the CDU (uF) value from the graph in the following figure so the correct
PFLive & VPDLive Interface Cabinet can be ordered.
Feeder / Bay ID :
Voltage : ________ kV
Unit : Bushing / CT
Red
Type : __________
Manuf. : __________
Phase A
Ser.No : __________
Capacitance
[PF]
Type : __________
Manuf. : __________
Ser.No : __________
C1 = ______
Type : __________
Manuf. : __________
Ser.No : __________
C1 = ______
Blue
Phase C
Yes [ ]
Obtain drawings of tap point or
of coupling unit.
No [ ]
For CT decide on isolation method.
Yes [ ]
Obtain drawings of tap point or
of coupling unit.
No [ ]
For CT decide on isolation method.
Yes [ ]
Obtain drawings of tap point or
of coupling unit.
No [ ]
For CT decide on isolation method.
C1 = ______
White
Phase B
Measurement Tap - Point present ?
[Yes / No ] and action
ONE-LINE DIAGRAM
To assist in the planning, cable layout and system configuration.
BUSHING TAP COUPLER
For test objects with capacitive tap-point a BTC is required. This unit will be coupled
mechanically and electrically to the tap-point via an appropriate adapter bolted or
threaded onto the CT or bushing.
47
Appendix B - OMI Software License Agreement
IMPORTANT - Read carefully before opening software packet. By opening the sealed packet containing the
software, you are agreeing to be bound by the terms of this agreement. This is a legal agreement between
you and OMI If you do not agree to all of the terms of this agreement, return the unopened software packet
and the accompanying items (including written materials and their containers) to OMI for a full refund.
PFLIVE & VPDLIVE SOFTWARE
1.
GRANT OF LICENSE. This License Agreement permits you to use one copy of the enclosed software
program (the “SOFTWARE”) on a single computer. If you have a multi-user license for the SOFTWARE,
then at any time you may have as many copies of the SOFTWARE in use as are permitted by the multiuse license. The SOFTWARE is in “use” on a computer when it is loaded into temporary memory (i.e.,
RAM) or installed into permanent memory (e.g., hard disk, CD-ROM, or other storage device). If the
anticipated number of users of the SOFTWARE could exceed the number of users permitted by
applicable licenses, the user must have a reasonable mechanism or process in place to ensure that the
number of persons using the SOFTWARE does not exceed the number permitted by the applicable
licenses. All rights not expressly granted to you in this agreement are reserved to OMI.
2.
COPYRIGHT. The SOFTWARE is owned by OMI or its suppliers and is protected by United States
copyright laws and international treaty provisions. Therefore, you must treat the SOFTWARE like any
other copyrighted material. You may, however, either (a) make one copy of the SOFTWARE solely for
backup or archival purposes, or (b) transfer the SOFTWARE to a single hard disk, provided you keep the
original solely for backup or archival purposes. You may not copy the written materials accompanying
the SOFTWARE.
3.
OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the SOFTWARE. You
may transfer the SOFTWARE to a third party provided that after each transfer you do not retain any
copies of the SOFTWARE, including all upgrades that you may have received, nor retain any of the
written materials accompanying the SOFTWARE.
4.
OPERATING SYSTEM OPTIONS (CD-ROM MEDIA). If the SOFTWARE is distributed with multiple
versions on a CD-ROM for compatibility with different operating systems, your license grant extends
to using only the applicable version for your operating system. You are, however, granted the limited
right to use more than one version of the SOFTWARE solely for the purpose of creating executables for
multiple operating systems, up to the number of licenses purchased.
LIMITED WARRANTY
LIMITED WARRANTY. OMI warrants, for your benefit alone, that (a) the SOFTWARE will perform
substantially in accordance with the accompanying written materials for a period of ninety (90) days from
the date of receipt, and (b) the medium on which the SOFTWARE is recorded will be free from defects in
materials and workmanship under normal use and service for a period of ninety (90) days from the date of
receipt. Some states/jurisdictions do not allow limitations on duration of an implied warranty, so the above
limitation may not apply to you.
CUSTOMER REMEDIES. OMI’s entire liability and your sole and exclusive remedy shall be at OMI’s
option, either (a) return of the fees paid, or (b) repair or replacement of the SOFTWARE that does not meet
OMI’s Limited Warranty stated previously, and which is returned to OMI with a copy of your receipt. The
Limited Warranty is void if failure of the software has resulted from accident, abuse, or misapplication.
Any replacement SOFTWARE will be warranted for the remainder of the original warranty period or thirty
(30) days, whichever is longer.
NO OTHER WARRANTIES. Except as expressly set forth in the preceding, the SOFTWARE and the
documentation are provided “as is” without warranty of any kind, and no other warranties, either expressed
or implied, are made with respect to the SOFTWARE, including but not limited to any implied warranties of
48
merchantability or fitness for a particular purpose or any other warranties that may arise from usage of
trade or course of dealing. OMI does not warrant, guarantee, or make any representations regarding the use
of or the results of the use of the SOFTWARE or the documentation in terms of correctness, accuracy,
reliability, or otherwise and does not warrant that the operation of the SOFTWARE will be uninterrupted or
error-free. OMI expressly disclaims any warranties not stated herein.
NO LIABILITY FOR CONSEQUENTIAL DAMAGES. The entire liability of OMI and its dealers, distributors,
officers, directors, agents, and employees are set forth in the preceding. To the maximum extent permitted
by applicable law, in no event shall OMI or its suppliers be liable for any damages including any special,
direct, indirect, incidental, exemplary, or consequential damages, expenses, lost profits, lost savings,
business interruption, lost business information, or any other damages arising out of the use or inability to
use the SOFTWARE or the documentation even if OMI has been advised of the possibility of such damages.
You acknowledge that the license fee reflects this allocation of risk. Because some states/jurisdictions do
not allow the exclusion or limitation of liability for consequential or incidental damages, the preceding
limitation may not apply to you.
GENERAL
WARNING. OMI products are not designed with components and testing for a level of reliability suitable
for use in the diagnosis and treatment of humans or as critical components in any life support systems
whose failure to perform can reasonably be expected to cause significant injury to a human. Reliability of
operation of the SOFTWARE can be impaired by adverse factors, including but not limited to fluctuations in
electrical power supply, computer hardware malfunctions, computer operating system software fitness,
fitness of compilers and development software used to develop an application, installation errors, software
and hardware compatibility problems, malfunctions or failures of electronic monitoring or control devices,
transient failures of electronic systems (hardware and/or software), unanticipated uses or misuses, or errors
on the part of the user or application designer. (Adverse factors such as these are hereafter collectively
termed “system failures.” Any application where a system failure would create a risk of harm to property or
persons (including the risk of bodily injury and death) should not be reliant solely upon electronic
monitoring due to the risk of system failure. To avoid damage, injury or death, the user or application
designer must take reasonably prudent steps to protect against system failures, including but not limited to
back-up or shut-down mechanisms.
U.S. GOVERNMENT RESTRICTED RIGHTS. The SOFTWARE and the documentation are provided with
restricted rights. Use, duplication, or disclosure by the Government is subject to restricts as set forth in the
Rights in Technical Data and Computer Software clause at DFARS 252.227-7013(c)(1)(ii) or the
Commercial Computer Software – Restricted Rights clause at 48 CFR 52.227-19(c)(2), or clause 1852.227-86(d) of the NASA Supplement, as applicable. Contractor/manufacturer is OMI P.O. Box 9007,
Valley Forge, PA 19485-1007.
This agreement is governed by the laws of the Commonwealth of Pennsylvania, exclusive of any
provisions of the United Nations Convention on the international sale of goods, and without regard to
principles of conflicts of law, and constitutes the complete agreement between you and OMI It supersedes
any oral or written proposals, prior agreements, purchase orders or any other communication between you
and OMI relating to the subject matter of this agreement. If any action is brought by either party to this
Agreement against the other regarding the subject matter hereof, the prevailing party shall be entitled to
recover, in addition to any relief granted, reasonable attorney fees and court costs. If any provision of this
Agreement is held invalid, the offending clause will be modified so as to be enforceable and , as modified,
shall be fully enforced, and the remainder of this Agreement will continue in full force and effect.
49
Warranty
Products supplied by OMI are warranted against defects in material and workmanship for
a period of one year following shipment. Our liability is specifically limited to replacing
or repairing, at our option, defective equipment. Equipment returned to the factory for
repair must be shipped prepaid and insured. This warranty does not include batteries,
lamps, or other expendable items, where the original manufacturer’s warranty shall apply.
We make no other warranty. The warranty is void in the event of abuse (failure to follow
recommended operating procedures) or failure by the customer to perform specific
maintenance as indicated in this manual.
50