weschler instruments Advantage II Enhanced Series User manual

Transformer Advantage II Enhanced Series
Owners Manual
Manual Part Number OMAMT200
Revision 6, November 10, 2011
Use with Firmware AMTSYS0202, Revision 02 and Higher
(See Page 3 “Displaying Firmware Part Number”)
16900 FOLTZ PARKWAY, CLEVELAND, OHIO 44149
440/238-2550, FAX [phone] e-mail: [email protected]

Table of Contents
Section Title Section Page
Introduction .......................................................................... 1.0 ........................ 1
Description, Models and Features, Intended Usage,
Displaying Firmware Part Number, Feature and Module Locations
ReceiptInspection .................................................................... 2.0 ........................ 5
Unpacking
Installation .......................................................................... 3.0 ........................ 6
Internal Inspection, Surface Mounting, Panel Mounting,
Terminal - by - Terminal Connection Guide,
Power Requirements, Jumper Settings, Calibration Check,
Channel Assignment, High Potential and Insulation Resistance
Testing, Terminal Assignments, Relay Module Configurations
Configuration ........................................................................ 4.0 ........................ 29
Supervisory Setup, Keystroke Diagrams, Keystroke - by - Keystroke
Set up Guide, Alarm Conventions, Function and Troubleshooting
Operation ........................................................................... 5.0 ........................ 76
Walk-up Functions, Operator Mode, Keystroke Diagrams
Sensor and Internal Alarm Displays
LTCTailoring ........................................................................ 6.0 ........................ 82
LTC Application
Calibration .......................................................................... 7.0 ........................ 87
CT, Linearization Table, Current Memory & 3 Channel Analog Retransmit Module Calibration
Troubleshooting ...................................................................... 8.0 ........................ 95
Digital Communications, Alarm Displays
Specifications ........................................................................ 9.0 .......................98-99
Warranty ...................................................................................................... 105
Figures
1. Feature and Module Locations (Surface mounting) ............................................................. 4
2. Feature and Module Locations (Through-panel mounting) ....................................................... 5
3. Power Supply and I/O Module Fuse and Jumper Locations (Figures 3A - 3E) ....................................... 9-11
4. 3-Wire Jumper Locations on the I/O Modules for CT & CTX (Fig 4A) and LTC & CT/LTC (Fig 4B) ........................ 15
5. Six form C Relay Module (SCRM) Jumper Locations. ........................................................... 17
6. Relay Operation for Various Alarm and Power Conditions ....................................................... 18
7. Multi Channel Analog Retransmit (MCAR) Module ............................................................. 19
8. Polyphase Current Input (PCI) Module ...................................................................... 20
9. Load & Cooling Apparatus Monitoring (LCAM) Module and Ranging Daughterboards (Figs 9A-9C) ....................... 22
10. Power and I/O Circuit EMI Protection (Figs 10A - 10E) ........................................................25-26
11. Terminal Assignments and Locations (Figs 11A - 11B) ........................................................27-28
12. Configuration Loop Entry Keystroke Diagram ................................................................ 32
13. Main Configuration Loop Summary Keystroke Diagram ........................................................ 33
14. Main Configuration Loop Detail Keystroke Diagram (Figures 14A - 14G) ..........................................34-40
15.LCAMAlarmHysteresisDiagram.......................................................................... 53
16. Walk-up Menu Keystroke Diagram ......................................................................... 77
17. Sensor and Internal Failure Alarm Displays .................................................................. 79
18. Operator Menu Keystroke Diagram (18A & 18B) .............................................................80-81
19. Relationship Between Step and Delay Variables .............................................................. 85
20. AMTCMF Software Analog Retransmit Calibration Screen ...................................................... 94
21. Surface Mount Outline and Drilling ....................................................................... 101
22. Recommended Surface Mounting Methods ................................................................. 102
23. Prohibited Surface Mounting Methods ..................................................................... 103
24. Cut-Out and Drilling for Through-Panel Mount Cases ......................................................... 104
25.CommunicationsPort1Cabling.......................................................................... 105
Tables
1. Power Supply Fuse Ratings and Sizes (Tables 1A & 1B) ........................................................ 8
2. Summary of Field Configurable Jumpers on Standard Advantage Modules .......................................... 8
3. Summary of Field Configurable Jumpers on Optional Advantage Modules ........................................... 9
4. Legacy Relay Map Summary .............................................................................. 17
5. Summary of LCAM Daughterboard Plug-in Settings ............................................................ 23
6. Channel Assignments ................................................................................... 24
7.AlarmSources ........................................................................................45-47
8. Channel Titles ......................................................................................... 64
9.RetransmitSources ....................................................................................68-69
10.Temperature/ResistanceRTDEquivalence ................................................................. 92
11.Specifications(Tables11A&11B)........................................................................98-99
Index ...................................................................................................... 106

1.0 Introduction
Description
Advantage transformer monitors are compact, fully electronic, programmable instruments designed for accurate and reliable
thermal management of liquid immersed power and distribution transformers. This manual describes the Enhanced SC,
DC, TC, LTC, CT, CTX and CT/LTC models, collectively referred to as the Advantage IIE series. The standard Advantage
IIE platform offers expanded alarm techniques, easier set-up, many user-convenience additions and provides the basis
for expansion into advanced data collection and communications. All models use the same firmware and optional
configuration & monitoring software, for a reduced software management burden. The computing engine is based on the
Motorola ColdFire microprocessor, a high performance 32 bit product.
Standard thermal inputs for all models are platinum RTD’s, which measure various temperatures in and around the
transformer. Thermowell type probes are used to measure top oil when inserted into an unheated thermowell, or simulated
winding temperature when inserted into a thermowell which is heated by current from a winding temperature indicator (WTI)
CT. The thermowell type probes also measure ambient temperature when mounted in free air with a supplied bracket.
Magnetically attached probes are used to measure tank wall temperatures when thermowells are not available.
The SC (Single Channel), DC (Dual Channel) and TC (Triple Channel) are, as their model designations connote, intended
to measure up to three thermal inputs. Depending upon where the probes are located, the DC and TC models can be used
to measure several different combinations of thermal values. An example of a popular DC model application is
measurement of top oil and simulated winding temperatures. An example of a popular TC model application is
measurement of top oil, simulated winding and ambient temperatures.
The LTC model is designed for thermal monitoring of Load Tap Changers. It is equipped with two thermal channels which
are used for main tank and LTC tank temperature measurement. Calculations of LTC conditions include a user-configurable
filter which compensates for environmental and application-specific conditions which could effect measurement accuracy.
The CT, CTX and CT/LTC models add a standard single winding current input, for calculation of winding temperatures.
The CT model is a transformer Winding Temperature Indicator (WTI) that is classified as an indirect, calculating type. This
classification of WTI measures the temperature of the insulating oil and the magnitude of the winding current and executes
a sequence of complex, proprietary mathematical calculations to accurately determine the temperature of the windings.
This sequence of mathematical operations is called a Winding Temperature Algorithm (WTA). The WTA uses several key
user-configurable transformer parameters and concepts based on world recognized transformer standards. The winding
current is measured proportionally through a CT, which is where the series name originated. It does not need a heated
thermowell. All of the models which bear the CT designation can be equipped with the LCAM module, which enables
monitoring of up to three winding temperatures. The LCAM module is also designed to provide cooling auxiliary health
feedback to the winding temperature algorithm, which is vital to accurate indication in today’s highly loaded transformer
operations.
The CTX model is a CT model with an additional channel which can measure any thermal value in the range of -40 to 250
EC. The channel title can be set to several common choices.
The CT/LTC model, as its name implies, combines the functions of the CT model Winding Temperature Indicator and the
LTC model Load Tap Changer thermal monitor, into a single unit. It monitors the temperature of the top oil, main tank, LTC
tank and winding current. If thermowells are provided for the top oil and the LTC tank, the third RTD sensor can be assigned
to measure bottom oil or ambient temperatures.
The enclosure and electrical components of the Advantage are designed to withstand the harshest operating environment.
The enclosure is made from a heavy gauge aluminum extrusion; designed and manufactured specifically for the Advantage.
The electronics have been designed to continue functioning under extreme EMI/RFI conditions, including close proximity
walkie-talkie keying and near lightning strike. Their performance has been documented through testing to world recognized
EMC standards.
OMAMT200 Rev 6 Page 1 of 107

All of the Advantage IIE series models are capable of being equipped with option modules to allow them to perform
functions that compliment their primary mission. The present option module offerings are the Multi-Channel Analog
Retransmit (MCAR) module and the Load and Cooling Apparatus Monitoring (LCAM) modules.
The MCAR module provides for up to 3 analog current loop outputs which are proportional to values measured or calculated
by the Advantage.
The LCAM module allows Advantage to measure multiple winding currents and monitor auxiliary inputs which provide
information on cooling equipment health, and pressure, flow and oil chemistry values.
Optional DNP-3 and ModBus digital communications protocols assure compatibility with other DNP-3 and ModBus
compliant devices.
Upgrading or servicing the Advantage hardware platform is a simple matter of unplugging and plugging modules which slide
into slots from the front of surface-mounted units, or from the rear of panel mounted units.
Upgrading the firmware is performed through digital communications, either on site or remotely. While configuration can
be done through the front panel controls, digital communications provides the same level of access and ease of
configuration on-site, or around the world.
Major Features
iHigh accuracy 22 bit, 8 channel A/D conversion. Resolvable Accuracy ± 0.1 EC or 1 Amp.
iWinding Temperature Algorithm based on IEEE and IEC transformer concepts.
iOptional DNP-3 slave level 1 and ModBus RTU / ASCII communications protocols.
iOptional Insulation Aging feature for tracking time to end-of-life.
iFirmware is upgraded by simple upload of an electronic file through digital communications.
iTime stamped peak and valley values. History is downloaded via digital communications.
iReal time clock power back-up five days standard, Thirty days optional.
i3 Button front panel programming. No covers to open.
iWalk-up selectable display of ten operating measurements and alarm annunciators.
iAlpha-numeric displays for prompts/units and values make indications clear and non-confusing.
iUser-entered transformer parameters for on-site custom tailoring of thermal profiles.
iStandard high capacity relay module with 1-5 form C setpoint and 1 form C System Fail Relays.
iOptional relay module with 1-6 form C high capacity relays for assignment flexibility.
iTwo relay modules can be combined to provide 11 form C setpoint / 1 form C system fail or 12 form C setpoint relays.
iRelays may be driven by any of up to 17 alarm sources and remote digital commands.
iEach relay may be operated by multiple alarm sources.
i24 alarm sources are provided.
iRelay set up options include user-programmable response to sensor failure.
iAlarms have software configurable relay pick-up and drop-out delay periods.
iHourly and calendar alarm sources allow for relay operation in response to time events.
iUp to three analog retransmit channels to remotely indicate any 3 of 11 selectable values.
iRugged extruded, epoxy powder-coated aluminum, NEMA 4X+ enclosure.
iCompact Size; 6.75 W x 10.50 H x 7.65 D. Mounting Plate 8 ¼ W x 13 dH.
iPower source options to suit all normal substation requirements (see Tables 1A and 1B).
Features Provided by the Optional MCAR Module
iTwo or three outputs
iCurrent outputs are independent of load resistance.
iAvailable with Channel to Channel Isolation
iBoth Measurement and Output Ranges are User Configurable.
OMAMT200 Rev 6 Page 2 of 107

Features Provided by the Optional LCAM Module
iIn SC, DC, TC and LTC models, monitoring of up to 8 analog or digital values with ranges from 5v to 300v AC or DC,
and two low current ranges 0-1 and 0-20 madc. High AC current inputs are handled through air-core (Rogowski coil)
CT’s. Can be used to report cooling auxiliary state (on / off) and health, contact closures from pressure and flow
switches and outputs from various transducers such as oil chemistry.
iEach auxiliary input can be configured independently of the others.
iOptional 3000 volt optically isolated inputs.
iIn CT series models, independent monitoring of up to three winding currents, using direct connection for up to 10 amps
and clamp-on air-core CT’s for higher currents. Provides 8 new displayable values, which can also be used as alarm
sources; 4 current magnitudes ( current 1, current 2, current 3, highest current) and 4 winding temperature magnitudes
(winding 1, winding 2, winding 3 and highest winding temperature).
iIn CT series models, monitoring of up to 5 or 7auxiliary analog or digital values, with the same ranges and flexibility
as described above.
iAssociative alarms can be used to monitor the result of a control action and operate another alarm independently if the
control action failed. Can be used to construct redundant alarms for increased reliability.
Using This Manual
This manual covers multiple models, not all of which contain all features described herein. For example, the CT model does
not have any LTC features and the SC, DC, TC and LTC models have no calculated winding temperature features. The
CTX can be thought of as a CT model with an extra thermal channel input. Although not present in all locations within the
manual, the graphics below will indicate a model specific feature where possible:
âSC Model Only, ãDC Model Only, äTC Model Only, åCT Series only, æCTX Only, çLTC & CT/LTC Only
èLCAM Equipped Only, éMulti-Channel Analog Retransmit Module Equipped Only
Intended Usage
The Transformer Advantage IIE family of thermal monitors are intended to be used on liquid immersed power and
distribution transformers of 10 KVA to 999.99 MVA capacity where a high degree of accuracy, faithfulness to thermal
response profile and reliability is required.
Displaying Firmware Part Number
The Advantage Enhanced (Advantage IIE) series uses the same firmware, regardless of model type, because the model
type definition is simply a configuration command that is sent to the unit via digital communications, at the factory. Thus,
the firmware part number does not need to include a model type code. The firmware part number “AMTSYS02YY” includes
coding to identify the series ( AMT = Advantage IIE ); that it is operating system software (“SYS”); that the version is 02 (“
02") and that the revision is (“YY”). Thus AMTSYS0202 is the major revision 02 (second) release of version 02 firmware
for the Advantage IIE series. This manual is intended to be used with revision 02 and higher revisions of version 02
firmware.
The firmware version and model type can be shown on the front panel display in the walk-up (normal operation) mode by
pressing the “E” (enter) key repeatedly until the version is displayed. The firmware code is of the form AMTGXT02YY where
“AMT” identifies the unit as an Advantage IIE, the “X” in “GXT” is the model code, “02" is the firmware version and “YY” is
the firmware revision. The model code is included in the front panel display for the convenience of the user in identifying
the model (s)he has. The revision level and date of the firmware can be displayed by pressing the down button when the
version is displayed. The first depression of the down button will show the revision level and the second depression will
show the date of the revision.
If the “GXT” in the front panel display is replaced with “SYS” the result is the firmware part number.
The model number codes are as follows; 3 = Single Channel (SC), 4 = CT, 5 = CTX, 6 = LTC, 7 = DC (Dual Channel),
8 = CT/LTC and 9 = TC (Triple Channel)
OMAMT200 Rev 6 Page 3 of 107

Figure 1B Surface Mount with
Cover and Window Removed.
Figure 1A. Surface Mount
Feature and Module Locations
The feature locations are illustrated in Figure 1 below and Figure 2 on page 5. Detail dimensions are contained in the
specifications section and Figure 21 and 24.
Note that access to the modules is from the front for surface mount and from the rear for through-panel mount. For each
of the two mounting configurations the modules are positioned in the same order, and slot position.
Prompt & Units Display
Programming Buttons
Value & Option
Display
Upper Cavity
Power Supply Terminals
Optional
Comm Port 1
I/O Module Terminals
Relay Module A
Terminals
Optional Relay
Module B Terminals
Option Module Terminals
(Actual module may vary)
Optional 3-Channel
Analog Retransmit
Module Terminals
Lower Cavity
Cover (top) Screws Cover (bottom) Screws Optional Cable Grips
Loosen Only Enough Remove After Loosening
to Remove Cover Top Cover Screws
The figures and text of this manual describe or illustrate all optional equipment and features which are available in the
Advantage LTC and CT-series models. Since each Advantage is built-to-order from many catalog options, the optional
equipment and features will only be present if they are ordered so-equipped or upgraded later in the factory or the field.
The positions of the modules in the upper cavity, illustrated in figures 1 and 2 must not be changed. The positions of
modules in the lower cavity show the default locations, as they would be shipped from the factory, for most configurations.
The locations were selected based primarily on convenience of wiring for installers. The actual position of the modules is
optional and they may be moved to other slots as required.
OMAMT200 Rev 6 Page 4 of 107

Figure 2. Rear View of Through-Panel Mount with Cover Removed
Upper Cavity
(behind backplane) Backplane Spacer Strips
Power Supply Terminals
Optional
Communications
Port 1 Input / Output Module
Terminals
Relay Module A
Terminals. Module
Shown Uses Clamp-On Optional Relay Module B
(external) CT Option. Terminals
LCAM Module Terminals.
Actual Module May Optional 3 Multi Channel
Vary from Illustration. Analog Retransmit Module
Terminals
Lower Cavity
Mounting Plate
Optional Cable Grips
2.0 Receipt Inspection
Packaging Inspection
The packaging in which your Advantage is shipped is designed to protect its contents against normal shipping shock and
vibration. If the external carton is damaged in any way, report any damage to the carrier as soon as possible and
immediately unpack the carton for internal inspection.
Unpacking
The Advantage is packaged with this manual, hardware and spares kit, 2 or 3 RTD cable grips (depending on number of
probes ordered), and any RTD probes which were ordered with the instrument. Other accessories such as external (clamp-
on) current probes, calibration tools, additional cable grips, or other items which may have been ordered at the same time
will be included only if the packaging integrity is not compromised. Please remove all packing materials and check them
for included accessories before discarding them.
Physically inspect the Advantage and its accessories for signs of hidden shipping damage. Evidence of excessive
roughness in shipping include bent mounting plates and distorted display windows. Remove the front cover (surface mount
models) or the rear cover (through-panel mount models) and check for dislodged modules or other parts adrift inside the
case.
OMAMT200 Rev 6 Page 5 of 107

3.0 Installation
Internal Inspection
Prior to operation, remove the cover plate and inspect the module cavity for accessories and shipping blocking items. In
some cases spare parts bags may be placed in the bottom cavity for installation convenience. These bags contain terminal
screws, jumpers and other items which may be misplaced during the installation process. Remove any panels which have
the word “DISCARD” printed on them. Check to see that the modules were not twisted or dislodged from their slots by
violent shipping shock by comparing the slot they are in with the slot marking on the front edge of the case. If a module has
been dislodged, correct the misalignment by pulling it straight out of the case, then reinserting in the correct slot. If this
cannot be easily accomplished, contact the shipping carrier and the factory to report the damage and receive further
instructions.
Surface Mounting
The Advantage may be mounted on studs welded to main or LTC tank side walls, structural channels or control cabinets
or may be bolted to uni-strut type universal mounting channels. When mounted directly to main or LTC tank walls, spacers
must be installed to provide a minimum dinch space between the mounting plate and the wall, for air circulation.
Elastomeric vibration isolators, spacers or grommets can be used but are not necessary, unless vibration causes the
modules to resonate within their slot mountings.
The location of the Advantage on the transformer should be determined by agreement with the transformer manufacturer,
following recognized practice standards. It can be mounted in any compass direction; however, consideration should be
made as to ability of service personnel to install, configure and read the displays comfortably. Although the displays have
been selected for their excellent brightness, readability of the display in direct sunlight may be impaired. An accessory hood
is available for conditions where sunlight’s effect becomes objectionable.
Refer to Figure 21 for mounting and overall dimensions and figures 22 and 23 for recommended and prohibited mounting
methods. The minimum recommended mounting stud or screw diameter is ¼ inch (6.4 mm). The holes towards the center
of the mounting plate are intended to be used with a uni-strut type channel in which the screw can be inserted through the
mounting plate and channel and the nut can be tightened from the channel side. Flat and Lock washers must be used.
One or more modules depend on a good electrical connection between the case and the site’s earth ground to ensure
adequate protection against EMI/RFI and ESD. Be sure to use toothed, electrical contact washers and/or clean paint off
of mounting points during the installation process.
Through-Panel Mounting
Advantage through-panel mounting configuration is designed to be installed such that the case’s display area alone
protrudes through an opening cut in a panel. The panel may be an exterior one, allowing the display to be exposed to the
outdoors, or may be an interior one, mounting the unit totally inside of the control cabinet. The operating temperature of the
Advantage must be considered if mounting inside of a control cabinet. If the temperature will exceed 70 EC the unit must
be mounted in another location.
The location of the Advantage on the transformer should be determined by agreement with the transformer manufacturer,
following recognized practice standards. It can be mounted in any compass direction; however, consideration should be
made as to ability of service personnel to install, configure and read the displays comfortably. Although the displays have
been selected for their excellent brightness, readability of the display in direct sunlight may be impaired. An accessory hood
is available for conditions where sunlight’s effect becomes objectionable.
Refer to Figure 24 for mounting panel cut-out and drilling details. The recommended screw and thread size is ¼-20. The
through-panel mount installation material includes a silicon-poron gasket for sealing the space between the front of the
mounting plate and the mounting panel. The gasket must be installed for applications where the display projection is to be
exposed, but it need not be installed if the unit is entirely enclosed in a cabinet. Flat and Lock washers must be used.
One or more modules depend on a good electrical connection between the case and the site’s earth ground to ensure
adequate protection against EMI/RFI and ESD. Be sure to use toothed, electrical contact washers and/or clean paint off
of mounting points during the installation process.
OMAMT200 Rev 6 Page 6 of 107

Terminal - by - Terminal Connection Guide
All signal, power and control connections are made at the terminal strips mounted at the edges of the installed modules.
If your Advantage is not equipped with a particular feature, the terminal screws will be omitted and replaced with plastic hole
plugs. The standard barrier strip terminations for all but the I/O module use #6-32 binding head screws suitable for retaining
spade or eyelet lugs. The I/O module will also accommodate spade or eyelet lugs for #6 screws, however; the screws have
METRIC 3.5-0.6 threads (color coded red) or 3.0-0.5mm threads (color coded blue-black). These screws must not be mixed
with the screws from the other modules or thread damage will result. All of the barrier strip connections will accept a lug
with a maximum width of 0.25 inches. The I/O module may optionally be fitted with phoenix-type terminals suitable for
connection of stripped conductor. Stripped conductor connections are not recommended for the power supply, cooling
control and current input modules. The connection assignments are printed on a sticker attached to the inside of the front
(surface mount) or rear (through-panel mount) cover. This diagram is also printed in this manual, see Figures 11A and 11B
on pages 27 - 28. When wiring the RTD common leads of the RTD’s to the common terminal, it is advised that all sense(-)
wires be crimped into a single terminal lug.
It is preferred that the power and communications (digital and analog retransmit) enter through the left hand cable grip and
that relay and current sense cables enter through the right hand cable grip. This orientation will result in the least electrical
noise transfer to the communications wiring. The signal input (RTD) cables enter through the small center cable grip holes.
Cable entry grips are not supplied standard, due to the wide variety of cable entry treatments used in the industry. Grips
are available from the factory as an option. The installer can use any appropriately sized, liquid-tight grips provided they
form a satisfactory seal to the case. The RTD grips are sized to fit the RTD cables of the probes which are shipped with
the unit. In the case of user-supplied probes, the standard ¼ inch ID grip will be supplied unless another size is specifically
ordered. It is important to have as tight a seal as possible to prevent the entry of dust and moisture. While it is recognized
that a perfect seal is sometimes difficult, the service life of the Advantage will be reduced by inadequate attention to sealing.
The terminal numbering convention used in the connections section of this manual shall refer to the module-specific
numbers shown on figures11A and 11B. For example, the terminals for the I/O module are labeled IO-1 to IO-20 for two-
channel devices or IO-1 to IO-22 for three channel devices.
Power Supply Module Connections
The Advantage is powered by one of the power sources listed in tables 1 and 2. The voltage level, including deviations due
to battery charging and expected fluctuations, must not exceed the stated tolerances given in the specifications section.
This requirement is based on EMI/RFI fence circuitry which clamps excessive voltages to prevent damage to sensitive
electronic circuitry.
In order for the EMI/RFI protection circuitry to work properly, an earth ground cable of 12-14 AWG must be installed
between power supply terminal 2 and the substation ground net. The cable must be as short as possible and may connect
directly to the transformer tank or control cabinet if it is in turn sufficiently grounded. Simply mounting the Advantage to the
transformer will not adequately ground the unit because the anti-corrosive treatment which is applied to the case is also
an electrical insulator.
Connections to the power supply terminals should be made using 12-14 AWG wire with insulation appropriate to the power
source voltage level. Insulated crimp-type eyelet terminals for #6 studs are recommended. Do not over-tighten the terminal
screws. Refer to the terminal assignment label on the furnished power supply for appropriate connection polarities and
voltage input ranges.
Table 1A tabulates the Wide Range power supply and its derivatives. The original 2000006301 WR supply was designed
to allow the Advantage to operate from any of the standard power sources available to it. The 2000006303 WR supply was
derived from the original WR supply to meet the need for a lower, low-range DC voltage level together with the standard
higher DC and AC voltage levels. The 2000006302, 48vdc and 2000006303, 32 vdc were derived from the original WR
supply where a lower-cost, low-range-only dc voltage level was required.
OMAMT200 Rev 6 Page 7 of 107

Table 1A. Wide Range Power Supply Fuse Ratings and Sizes
Power Supply Part
Number
Voltage Nominal
(Range) Fuse Rating Fuse Type Fuse Component ID Figure
2000006301 48 vdc (36-75 vdc)
90-264vac/85-300vdc
¾ amp slow-blow
½ amp slow-blow
2AG (4.5 x 15 mm)
“
F2
F1 3B
2000006302 48 vdc (36-75 vdc) ¾ amp slow-blow 2AG (4.5 x 15 mm) F2 3C
2000006303 32 vdc (24-40 vdc)
90-264vac/85-300vdc
¾ amp slow-blow
½ amp slow-blow
2AG (4.5 x 15 mm)
“
F2
F1 3B
2000006304 32 vdc (24-40 vdc) ¾ amp slow-blow 2AG (4.5 x 15 mm) F2 3D
Table 1B tabulates power supplies that were developed for the shallow-case First Gen, Advantage IIR and early Advantage
IIE models. While still supported, these supplies do not provide the broad power source coverage, nor do they have the
improved power margin and reliability that the WR power supply provides.
Table 1B. Standard Power Supply Fuse Ratings and Sizes
Power Supply Part
Number Voltage Nominal (Range) Fuse Rating Fuse Type Fuse Component
ID Figure
2000001304 48vdc (36-60vdc, low power) ¾ amp Slow-Blow 2 AG (4.5 x 15mm) F1 -
2000001307 120vac / 125vdc
240vac / 250vdc
½ amp Slow-Blow
¼ amp Slow-Blow
2 AG (4.5 x 15mm)
2 AG (4.5 x 15mm)
F1
F1 3A
2000001308 240vac / 250vdc ¼ amp Slow-Blow 2 AG (4.5 x 15mm) F1 3A
2000001310 48vdc (36-60vdc, high power) ¾ amp Slow-Blow 2 AG (4.5 x 15mm) F1 -
2000001311 â125vdc ± 18% ¾ amp Slow-Blow 2 AG (4.5 x 15mm) F1 -
âThis supply was provided in limited quantity as a transition to the WR power supply. Replaced by the WR power supply.
Table 2. Summary of Field Configurable Jumpers on Standard Advantage Modules
Model Module Figure Number Jumper ID Function Position(s)
SC, CT Input / Output 4A J2 RTD1, 3 or 4 Wire Installed / Removed
J3 RTD2, 3 or 4 Wire N/A, Hardware Not Installed
DC, CTX,
LTC Input / Output 4A J2 RTD1, 3 or 4 Wire Installed / Removed
J3 RTD2, 3 or 4 Wire Installed / Removed
TC, CT/LTC Input / Output 4B
J2 RTD1, 3 or 4 Wire Installed / Removed
J3 RTD3, 3 or 4 Wire Installed / Removed
J4 RTD3, 3 or 4 Wire Installed / Removed
All 6-Relay 5
J2 Primary or Secondary CCA / CCB
J5 Legacy or Consolidated NON-SPI / SPI
J8 Normal / Diagnostic PB6 / QDIN
OMAMT200 Rev 6 Page 8 of 107

Figure 3A. Power Supply Jumper & Fuse Location, Power Supplies 2000001307 & 2000001308
Fuse
Table 3. Summary of Field Configurable Jumpers on Optional Advantage Modules (Figure 8).
Model Module Jumper ID Function Position(s)
All LCAM J2 Channel 1 Current / Contact Wetting 1ma, 20ma, Wetting, Off
J6 Channel 2 Current / Contact Wetting 1ma, 20ma, Wetting, Off
J10 Channel 3 Current / Contact Wetting 1ma, 20ma, Wetting, Off
J14 Channel 4 Current / Contact Wetting 1ma, 20ma, Wetting, Off
J18 Channel 5 Current / Contact Wetting 1ma, 20ma, Wetting, Off
J22 Channel 6 Current / Contact Wetting 1ma, 20ma, Wetting, Off
J26 Channel 7 Current / Contact Wetting 1ma, 20ma, Wetting, Off
J30 Channel 8 Current / Contact Wetting 1ma, 20ma, Wetting, Off
J5 Channel 1 Voltage Range Selection 5, 75, 150, 300
J9 Channel 2 Voltage Range Selection 5, 75, 150, 300
J13 Channel 3 Voltage Range Selection 5, 75, 150, 300
J17 Channel 4 Voltage Range Selection 5, 75, 150, 300
J21 Channel 5 Voltage Range Selection 5, 75, 150, 300
J25 Channel 6 Voltage Range Selection 5, 75, 150, 300
J29 Channel 7 Voltage Range Selection 5, 75, 150, 300
J33 Channel 8 Voltage Range Selection 5, 75, 150, 300
OMAMT200 Rev 6 Page 9 of 107

Thermal
Shoe.
DO NOT
PRESS
HERE
Figure 3C. 48 VDC Wide Range Power Supply Derivative 2000006302
Figure 3B. Wide Range Power Supply 2000006301 & Derivative 2000006303 Top View
Low Voltage Section Fuse F2
High Voltage Section Fuse F1
Thermal
Shoe.
DO NOT
PRESS
HERE
OMAMT200 Rev 6 Page 10 of 107

The terminal assignments on the wide range power supply differ from its predecessor to accommodate the two voltage
ranges that it can be connected to. The supply also offers the ability to verify that the three internal bus voltages are
operating. Simply press the “push to test” button and the three blue indicator lamps will light at approximately the same
brightness if they are working properly. A dim or overly bright indicator gives a quick indication that a section may be mal-
functioning. The blue LEDs are of a high intensity type, intended to be visible in direct sunlight that is common to most
substation environments.
The substation environment is a harsh one where high temperatures can damage electronic circuits and components that
do not have an adequate thermal management system. The Wide Range power supply 2000006301 and its derivatives
2000006302 and 2000006303 are high power supplies that have an advanced thermal management system to remove heat
from critical components, thus increasing reliability and life. A critical component in the thermal management system is the
Figure 3D. 32 VDC Wide Range Power Supply Derivative 2000006304
Pull Here
to Extract
Supply
Figure 3E. Typical Wide Range Power Supply & Derivatives Front Panel. Label for 2000006301 Shown
Bus Voltage
Test Switch
Bus Voltage
Indicator Lamps
OMAMT200 Rev 6 Page 11 of 107

thermal shoe, which transfers heat energy from the components to the case, where it can be dissipated to the outside
environment. The shoe must be in intimate contact with the inside of the case, and it is therefore very important that the
shoe not be distorted is any way, if the supply is removed. It is recommended that the supply not be disturbed unless a fuse
has opened or it has failed. If it is suspected that the supply is the source of a problem, first press the bus voltage test
button. If the three bus voltage indicator lamps illuminate, the supply is not the problem, it should be left in place and another
troubleshooting area should be investigated.
It the supply must be removed, it must be extracted by pulling straight out from the center-rear of the front label-mounting
bracket. See figure 3E “Pull Here to Extract”. Do not set the supply down on the thermal shoe, nor compress it in handling.
When re-inserting the supply, it must be inserted straight in, without cocking it to the side. There will be slight resistance
to insertion as the shoe contacts the side of the case. This is normal and desirable.
I/O Module Connections
There are two-channel and three-channel I/O modules used in Advantage IIE. Two channel I/O modules are used in
SC,DC, CT and CTX models while three channel I/O modules are used in TC, LTC and CT/LTC models. Connections to
the I/O module are made to a 20 circuit (two-channel) or 22 circuit (three channel) pluggable stadium terminal block. The
terminal block may be removed, with connections intact, by unscrewing the small screws on either side of the block. Be sure
to re-tighten the screws after re-plugging the block to the module. See the “Terminal by Terminal Connection Guide”
paragraphs beginning on page 6 for details regarding the metric screws used on the I/O module.
Analog Retransmit Connections
The optional, I/O module based single-channel analog retransmit output is provided in the event that a single retransmit
channel is required. If more than one analog retransmit channel is required, the multi channel analog retransmit (MCAR)
module, described in detail starting on page 19 should be ordered. The single-channel retransmit provides an analog signal
which is proportional to any three of eleven displayable values selected by the user in the ANLOG RTRN1 submenu of the
main menu’s ANRTN SETUP. See Figure 14E for selection details and table 9 for available sources.
The retransmit output is a constant current source providing up to 24 madc within the compliance voltage range of 0-20 vdc.
The maximum loop resistance is determined by dividing 20 by the loop current desired. For example, with a 20ma loop
current, the maximum loop resistance is 20 / 0.02 = 1000Ω. As another example, with a 1 ma loop current, the maximum
loop resistance is 20 / 0.001 = 20000Ω. The resistance can be as low as one ohm.
The outputs’ isolation is determined by the surge and EMI fence circuitry. Figure 9D shows a simplified circuit representation
of the retransmit output. Circuit-to-earth ground isolation is greater than 1 megohm when the circuit-to-earth voltage is
below 24 volts.
The terminal connections for SC, DC, CT, CTX and LTC models can be found on the diagram of Figure 11A and the
terminal connections for TC and CT/LTC models can be found on the diagram of Figure 11B. If the terminal screws are
missing from the terminal block, the feature is not installed.
Connections to the I/O module terminals may be made using #6 x 0.25" wide lugs suitable for the wire size which meets
the maximum loop resistance calculated above. It is recommended that at least 24 AWG wire be used, for reasons of
ruggedness. A distance of 15500 feet can be covered by a pair of 24 AWG wires without exceeding the maximum loop
resistance at 24 madc loop current.
The analog retransmit has been factory calibrated to meet 0.5% accuracy requirements for the standard output range of
four to twenty milliamps. This factory calibration will be effective even if the output is changed from 4 - 20 milliamps to, for
example, 0 - 1 ma. There are some installations where errors in transmission equipment may result in errors at a remote
site where it is desired to indicate a local transformer temperature or winding current. In this instance, the user’s retransmit
coefficient may be used to trim the output of the channel to force the remote site to read properly. This is not a calibration
action, it is simply a user convenience feature. If the coefficient is set to 0.0, the output will be nominal. See the “Prompt
COEF1, COEF2, COEF3" in the analog retransmit section of the keystroke-by-keystroke guide to set up for details of this
feature.
OMAMT200 Rev 6 Page 12 of 107

RTD Inputs
Either 3 wire or 4 wire RTD’s can be connected to the RTD inputs. The Weschler standard probe is 4 wire, chosen for
enhanced probe accuracy regardless of lead length. The lead wire of the standard probe is 24 AWG and a crimp terminal
suitable for 22-26 AWG wire and a #6 stud should be used. Users should consult the documentation that came with their
probes if they are not using probes provided by Weschler. Refer to figures 10A through 10D of this manual or the label
affixed to the back of the Advantage terminal access cover for terminal assignments. Note that like colors are assigned to
like polarities. For example, red wires are connected to positive sense and positive source and white wires are connected
to negative sense and negative source. On SC, DC, CTX and LTC models terminal I/O-15 is the source negative terminal
for RTD’s 1 and 2. On TC and CT/LTC models terminal I/O-10 is the common source negative for all RTD’s To avoid the
difficulty in connecting three crimp lugs to this terminal, it is suggested that the three RTD negative sense leads be twisted
together and the splice be crimped into a single lug suitable for 20-24 AWG wire.
A fifth wire is provided for grounding of the woven stainless steel cable jacket. The wire is typically color coded gray, but
may be any color other than white, red or green. This wire is provided to connect the RTD cable jacket to the earth-ground
terminal of the power supply, or another known-good earth ground point when it is known that the RTD probe itself is
isolated from a good earth ground. It is important that both ends of the cable jacket not be grounded, to avoid a current
loop in the jacket created by coupled electric or magnetic fields.
The I/O module has jumpers that need to be set, according to which RTD configuration is being used. The default setting
is 4-wire, corresponding to the standard RTD supplied by Weschler. When a 4 wire probe is being used, the jumper must
be removed (default), or can be installed on one pin of the header only. If a three wire RTD is used the jumper must be
installed across both header pins. 3-wire jumpers are provided in the hardware and spares kit in the event that 3-wire RTD’s
are used. Any mix of 3 and 4-wire RTD’s may be connected as required, provided the appropriate jumpers are used.
The two-channel I/O module has one jumper (J2) to be set for SC and CT models and two jumpers (J2 and J3) to be set
for DC, CTX and LTC models. See figure 4A for the location.
The three channel I/O module has three jumpers (J2, J3 and J4) to be set for TC and CT/LTC models. See figure 4B for
the location.
If a 3-wire RTD is being used and the jumpers are not installed properly, the sensor failure alarm will flash on the display.
If a four-wire RTD is being used and the jumper is installed, the measured temperature may appear to be low.
Digital Communications
SC, DC, LTC, CT and CTX Models
Hard wired connections for digital communications are made to the I/O module, at terminals I/O-16 to I/O-20. RS-232 is
connected to I/O-16 (comm transmit 1), I/O-18 (comm receive 1) and I/O-20 (digital comm ground). Note that the digital
communicationsgroundisforcommunicationsonly;internalcircuitrymaybedamagedifearthorotherprotective
ground is connected to this terminal.
RS-485 may be connected as two wire or 4 wire. For 2-wire connections the host’s receive “+” or “B” conductor is connected
to I/O-16 (comm transmit 1) and the host’s receive “-“ or “A” conductor is connected to I/O-17 (comm transmit 2). A jumper
must be installed between I/O-16 and I/O-18 and a second jumper must be installed between I/O-17 and I/O-19. If the host
has only a 4-wire connection, jumpers may also be required at the host’s terminals. Consult the host’s literature for details
regarding connections at the host end of the cable. A 120 ohm resistor may be required across terminals I/O-18 and I/O-19
to comply with the RS-485 specification. It is suggested that the system be tested first without the resistor, and if it performs
properly, do not install it.
For RS-485 4-wire connections the host’s receive “+” or “B” conductor is connected to terminal I/O-16 (comm transmit 1)
and the host’s receive “-“ or “A” conductor is connected to I/O-17 (comm transmit 2). The host’s transmit “+” or “B” conductor
is connected to terminal I/O-18 (comm receive 1) and the host’s transmit “-“ or “A” conductor is connected to I/O-19 (comm
receive 2). A 120 ohm resistor may be required between each of terminals I/O-16 and I/O-17 and between I/O-18 and I/O-
OMAMT200 Rev 6 Page 13 of 107

19 to comply with the RS-485 specification. It is suggested that the system be tested first without the resistors, and if it
performs properly, do not install it.
TC and CT/LTC Models
Hard wired connections for digital communications are made to the I/O module at terminals I/O-17 to I/O-21.
RS-232 is connected to I/O-17 (comm transmit 1), I/O-19 (comm receive 1) and I/O-21 (digital comm ground). Note that
the digital communications ground is for communications only ; internal circuitry may be damaged if earth or other
protective ground is connected to this terminal.
RS-485 may be connected as two wire or 4 wire. For 2-wire connections the host’s receive “+” or “B” conductor is connected
to I/O-17 (comm transmit 1) and the host’s receive “-“ or “A” conductor is connected to I/O-18 (comm transmit 2). A jumper
must be installed between I/O-17 and I/O-19 and a second jumper must be installed between I/O-18 and I/O-20. If the host
has a 4-wire connection, jumpers may also be required between its transmit and receive “-“ or “A” terminals and its transmit
and receive “+” or “B” terminals. Consult the host’s literature for details regarding connections at the host end. A 120 ohm
resistor may be required across terminals I/O-19 and I/O-20 to comply with the RS-485 specification. It is suggested that
the system be tested first without the resistor, and if it performs properly, do not install it.
For RS-485 4-wire connections the host’s receive “+” or “B” conductor is connected to terminal I/O-17 (comm transmit 1)
and the host’s receive “-“ or “A” conductor is connected to I/O-18 (comm transmit 2). The host’s transmit “+” or “B” conductor
is connected to terminal I/O-19 (comm receive 1) and the host’s transmit “-“ or “A” conductor is connected to I/O-20 (comm
receive 2). A 120 ohm resistor may be required between each of terminals I/O-17 and I/O-18 and between I/O-19 and I/O-
20 to comply with the RS-485 specification. It is suggested that the system be tested first without the resistors, and if it
performs properly, do not install them.
All Models
The connections for RS-422 communications are the same as the RS-485 4-wire configuration. The RS-485/422
specification has a differential signal and should not require a communications ground between the host and Advantage.
Some systems will not work properly; however, if the communications ground is not connected. It is suggested that the
system be tested first without the ground and if it functions normally, do not connect the ground. If a ground is necessary,
two 100 ohm resistors must be placed in series between the host’s communications ground and the Advantage
communications ground terminal; one at the Advantage end and one at the host end, to reduce circulating currents. The
communications ground must not be connected to earth ground.
All communications cables should be a shielded, twisted pair type with AWG 20 minimum conductor size for short runs and
AWG 18 for longer runs. The shield must be grounded to a frame or earth ground.
RS-485, 2-wire systems must be properly biased to provide reliable communications. If not properly biased, when all drivers
are in the tristate (listen) mode, the state of the bus will be unknown. If the voltage difference between the lines is not
greater than ±200mv, the last bit transmitted will be interpreted to be the state of the line. This may result in communications
errors if the last bit transmitted is low, because the receivers must be idle in the logic high state, in order to determine when
a communication has begun. If the logic state is low continuously, framing errors will result, causing communications to fail.
If communications are poor or are not functioning and an RS-485 2-wire scheme is in use, bus bias could be the problem.
There are excellent tutorial documents available from National Semiconductor on their website, www.national.com. The
two application notes that cover the bus biasing issue are AN-847 and AN-1057.
OMAMT200 Rev 6 Page 14 of 107

Figure 4B. 3-Wire RTD Jumper Locations on the I/O Module for TC and CT/LTC Models
J3 RTD2 Jumper
J4 RTD3 Jumper
Figure 4A. 3-Wire RTD Jumper Location on the I/O Module for SC, DC, CT, CTX and LTC Models
J2 RTD1 Jumper
J3 RTD2 Jumper
J2 RTD1 Jumper
OMAMT200 Rev 6 Page 15 of 107

Relay Module Connections:
Connections to the relay terminals can be made using the lugs described in the connections general section above. Lugs
and hook-up wire conductor should be appropriate for the current level plus expected overloads. Hook up wire insulation
should be chosen appropriate to the peak circuit voltage level.
In January 2011, the existing 5 form B/1 form C and 4 form C cooling control module designs were superceded with a 6 form
C relay design referred to as the Six form CRelay Module or SCRM.. This new design provides 12 form C relays on two
modules. This improves on the former relay design which had its relays configured in two formats on three modules.
The cooling control module was originally given its name to connote its primary mission - to turn cooling apparatus on and
off. There are two cooling control module positions in every Advantage, referred to on terminal assignment diagrams as
CCA and CCB. Relay six on CCA is configured as the System Fail Relay (SFR) as the factory default, but it can be
reconfigured as a general purpose set point relay if necessary.
The former relay configuration was referred to as the “Legacy Relay Map” and the new relay configuration is referred to as
the “Consolidated Relay Map”. A relay map is simply the location of the relays on modules; the method of numbering them
and their terminal connections. The relay design that is being replaced will be maintained for service and repair purposes
only.
Jumpers
The SCRM is equipped with three jumpers; J2, J5 and J8. Figure 5 shows the locations of J2 and J8 in their default positions
when the SCRM is used as CCA in units built after January 1, 2011. If the SCRM is to be used as CCB, move jumper J2
to the position labeled “CCB”
Jumper J5 is shown in the position labeled “Non-SPI”, which is to be used with Advantage models built prior to January 1,
2011. For units built after January 1, 2011, J5 must be set to the position labeled “SPI”.
Jumper J8 is only used for factory diagnostics and must be set to the position labeled “PB6" for normal operation.
Relay Refresher
Form C relays provide both form A (normally open) and form B (normally closed) stationary contacts with a third contact
which moves between and is common to both the form A and B contacts. Not surprisingly, the third contact is referred to
as the common contact. The common contact is mounted on an armature which is made of a ferritic material that is attracted
to the magnetic field created when an operating current is passed through the relay coil. The armature is hinged at one end
to allow it to swing back and forth between the form A and form B contacts. A spring holds the armature such that the
moving contact rests on the form B contact when there is no current in the relay coil. This is the normally closed condition.
The same spring that holds the common contact against the form B contact, keeps the common contact separated from
the form A contact to maintain an open circuit condition, when there is no operating current in the relay coil. This is the
normally open condition.
In order to open, or break the circuit between the form B and common contacts, an operating current must be passed
through the relay coil to attract the armature against the restoring force of the spring to separate the common contact away
from the form B contact. At the same time that the operating current separates the common contact from the form B contact,
it causes the common contact to rest on the form A contact, which completes the circuit between the common and A
contacts.
Form B contacts are considered to be normally closed failsafe configurations. This means that in an unalarmed state, the
common contact is held separated from the form B contact by an operating current in the relay coil. In the event that an
alarm is called for, or power is lost, the operating current in the coil is shut off and the common contact returns to its normally
closed condition, against the form B contact. The failsafe name comes from the fact that if an alarm is required, or power
fails, or an internal failure occurs, the relay coil current will shut off and the contacts will return to their normally closed
condition by spring action. These contacts are normally used for fan circuits and power-fail alarms.
OMAMT200 Rev 6 Page 16 of 107

Figure 5. Six form C Relay Module (SCRM) Jumper Locations
Current Input Connections (CT, CTX and CT/LTC Models Only)
If your model has a Polyphase Current Input (PCI) module or Load and Cooling Apparatus Monitoring (LCAM) module
installed, the WTI winding current connections must be made to it. Refer to the Optional Module Connections sections
below, for connection details.
If your CT-series unit does not have a PCI or LCAM module, connections for current sensing are made to the current input
terminals CCA19 and CCA20 of the Six form CRelay Module (SCRM). In configurations with two cooling control modules,
only the module in the CCA position has current sense input hardware installed on the module.
Jumper J2 Shown in Primary (CCA) Position
Jumper J5 Shown in Non-SPI Position
Jumper J8 Shown in Normal (PB6)
Position
CT Current Input Terminals
Terminal CCA-19
Terminal CCA-20
OMAMT200 Rev 6 Page 17 of 107

COM
NCNO
SFR
COM
NCNO
SFR
Power Off Power On
Un-Alarmed Power On
Alarmed Power On Sensor Fail
CONDITIONS
COM
NCNO
SFR
Configuration Set
By User
Not
Applicable
Not
Applicable SFR
COM
NO NC
SFR
COM
NO NC
COM
NCNO
SFR
Normal (Un-Alarmed) State Set to Energized
Normal (Un-Alarmed) State Set to De-Energized
Figure 6. Relay Operation for Various Alarm and Power Conditions
Relays “N” have their system failure (SNFAL) value set to “ON”. If the SNFAL value is set to “OFF” the relay will remain in its current state when a
system failure is detected.
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Normal (Un-Alarmed) State Set to Energized (ENRGZ))
Sensor Failure Effect (Prompt SNEFF) Set to De-Energize (DE-EN)
Sensor Failure Function (SNFAL) Set to ON
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Normal (Un-Alarmed) State Set to De-Energized (DE-EN)
Sensor Failure Effect (Prompt SNEFF) Set to De-Energize (DE-EN)
Sensor Failure Function (SNFAL) Set to ON
Normal (Un-Alarmed) State Set to De-Energized (DE-EN)
Sensor Failure Effect (Prompt SNEFF) Set to Energize (ENRGZ)
Sensor Failure Function (SNFAL) Set to ON
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Normal (Un-Alarmed) State Set to Energized (ENRGZ))
Sensor Failure Effect (Prompt SNEFF) Set to Energize (ENRGZ)
Sensor Failure Function (SNFAL) Set to ON
Relay N
COMM
NO NC
Relay N
COMM
NO NC
Connections to the current terminals can be made using the lugs described in the connections general section above. Lugs
and hook-up wire conductor should be appropriate for the current level expected plus overloads. Hook up wire insulation
should be chosen assuming an open circuit in the CT secondary could occur at any point in the circuit.
Special attention must be taken when wiring to the current sense inputs if wiring directly to the WTI current transformer (CT),
since the open secondary of a CT can generate high voltages which may be lethal to personnel. Precautions must be taken
to either de-energize the transformer (preferred) or short circuit the CT secondary before making any wiring changes.
Consult with your safety personnel for appropriate safety practice prior to making any wiring connections. Once connections
to the current sense terminals are made, the sense circuit must be configured to the transformer’s CT, by performing the
CT SETUP operation. Reference the keystroke-by-keystroke configuration section paragraph titled “Prompt CT1, 2, 3
SETUP" for configuration information on this important step.
Operation of System Failure Relay
Operation of Relays, Other Than the System Failure Relay
OMAMT200 Rev 6 Page 18 of 107