Qualitrol 111-300 Series User manual

Electronic Temperature
Monitor for Liquid Cooled
Transformers
111
111111
111-
--
-300 Series
300 Series300 Series
300 Series
Instruction Manual
IST-075-1

QualiTROL
QualiTROLQualiTROL
QualiTROL
111
111111
111-
--
-300 Series Electronic Temperature Monitor
300 Series Electronic Temperature Monitor300 Series Electronic Temperature Monitor
300 Series Electronic Temperature Monitor
for Liquid Cooled Transformers
for Liquid Cooled Transformersfor Liquid Cooled Transformers
for Liquid Cooled Transformers
Instruction Manual
Instruction ManualInstruction Manual
Instruction Manual

NMI 23070 1
IST-075-1
July 23, 2002
T
TT
TABLE OF
ABLE OFABLE OF
ABLE OF C
CC
CONTENTS
ONTENTSONTENTS
ONTENTS
Table of Contents _____________________________________________________________1
Overview ____________________________________________________________________2
QualiTROL Electronic Temperature Monitor...........................................................................2
QualiTROL......................................................................................................................................5
About This Manual.......................................................................................................................... 5
Installation and Wiring ________________________________________________________6
Mounting of the Temperature Monitor
Mounting of the Temperature MonitorMounting of the Temperature Monitor
Mounting of the Temperature Monitor....................................................................................6
Primary Power .................................................................................................................................6
Sensors.............................................................................................................................................6
Relay Contacts.................................................................................................................................7
mA Output .......................................................................................................................................7
RS-232 Link.....................................................................................................................................7
RS-485 Link (optional)....................................................................................................................8
Heater Kit (optional)........................................................................................................................8
Operation___________________________________________________________________10
Temperature Display...................................................................................................................10
Status Icons....................................................................................................................................10
Push-Buttons..................................................................................................................................10
Fan Exerciser.................................................................................................................................12
Fan Bank Switching.......................................................................................................................12
Functional Specifications ______________________________________________________13
Setup Software ______________________________________________________________14
Installation .....................................................................................................................................14
Files................................................................................................................................................14
Configuration.................................................................................................................................14
Winding Rise .................................................................................................................................15
Monitor..........................................................................................................................................16
Calibrate.........................................................................................................................................17
Appendix B – Using the Model 111L/111W in the European Community ______________19
Fuses .............................................................................................................................................. 19
Appendix C – ModBus Communications _________________________________________20

Electronic Temperature Monitor
2
O
OO
OVERVIEW
VERVIEWVERVIEW
VERVIEW
QualiTROL Electronic Temperature Monitor
QualiTROL Electronic Temperature MonitorQualiTROL Electronic Temperature Monitor
QualiTROL Electronic Temperature Monitor
The 111-300 has a weatherproof enclosure, which can contain either one or two
Model 111L/111W Electronic Temperature Monitor (ETM) units. The basic
unit contains a Model 111W which can monitor winding current and then
calculate the winding temperature. The 111W has four setpoint contacts which
operate from the winding temperature. If an independent monitor for oil
temperature is desired, a Model 111L can be included in the 111-300. The 111L
monitors temperature and provides an additional four setpoint contacts operating
from the oil temperature. In a retrofit situation the ETM universal sensors
replace the mechanical thermometer sensors. See Figure 1 for enclosure details.
Figure 1. Enclosure Dimensions
Both units use an RTD (Pt100) temperature sensor in a thermal well to monitor
oil temperature. If both units are supplied, a dual RTD sensor can be supplied so
that only a single thermal well is required. A clip-on CT is used to measure the
current. It monitors a standard CT loop such as a 0-5A or 0-10A. The 111L and
111W both provide the following standard features:
• Displays the present temperature as well as the maximum temperature
stored.
• Operates two SPDT relays to control Cooling fans. Each relay has its own
setpoints. An icon on the display Indicates that the Fans are ON. (Icon #1
and #2)
• A Manual Fan Control provides the capability to force the Fans to turn ON.
An icon on the display indicates that the unit is in Manual Fan mode.

Electronic Temperature Monitor
3
• A Fan exerciser circuit will turn the Fans ON for a short time at periodic
intervals (ON time and interval is programmable).
• Automatic fan bank switching evens out the wear of Fan 1 and Fan 2 relays
by swapping their respective setpoints after each actuation.
• Operates a relay with a SPDT contact when one of the inputs exceeds the
ALARM setting. An icon on the display indicates that the ALARM is ON.
(Icon #3)
• Operates a relay with a SPDT contact when one of the inputs exceeds the
TRIP setting. An icon on the display indicates that the TRIP relay is ON.
(Icon #4). Optionally, this relay can be set to operate from internal ambient
temperature. In this mode, the “trip” relay can be used to operate as a
thermostat for heater control. Heater kit is sold separately (KIT-031-1).
• A TEST function shows the stored setpoints, shows the internal temperature
of the ETM, oil temperature, present current as % of full scale, and tests the
digital display.
• Any time the unit detects an internal or external fault such as a sensor lead
open circuit, the Alarm relay and both Fan relays operate, the FAULT icon
shows on the display and the temperature displays “- - -“. A failed sensor
will NOT cause a TRIP.
• A failed microprocessor will activate Fan 1 and Alarm relays via hardware
control.
• The Fan 1 relay is normally de-energized (non-failsafe). It will not operate
on Power Failure
• The Fan 2 relay can be configured by user to be either normally de-energized
(non-failsafe) or normally energized (failsafe). The default is normally
energized (failsafe) so that a loss of power to the ETM will turn ON one fan
bank.
• The Alarm relay is normally energized (failsafe so that an ALARM is
indicated on power failure.)
• The Trip relay can be configured by user to be either normally energized
(failsafe) or normally de-energized (non-failsafe). The default is normally
de-energized (non-failsafe) so that a loss of power to the ETM will not cause
a Trip.
• An RS-232 data port is used to setup the programmable parameters of the
unit. The setpoints and some other functions can also be set using buttons
on the front panel.
• Prime Power can be any voltage from 80-265 VAC or 20-280 VDC.
• The ETM is panel mounted through a cutout in a hinged panel of a weather
proof box
• The ETM provides the following OPTIONS, which must be specified at time
of order:
• A mA loop output may be specified which is proportional to the present
temperature. The mA loop can be set to either 0-1mA or 4-20mA via the
front panel or the RS232 port.

Electronic Temperature Monitor
4
• An RS485 2 wire or 4 wire port may be ordered as an option. This port uses
Modbus RTU protocol to communicate the temperature data and the state of
the unit to a remote communications device. See Appendix C for details of
the Modbus functions.
• A heater kit (KIT-031-1) may be ordered (separately) that can be used in any
enclosure unit. Each heater operates from 120 VAC and so can be wired in
series; or in parallel; for 240 or 120 VAC operation. It is recommended that
the trip relay from the “oil” temperature unit is used as the thermostat
control. This can be configured through the user software to operate from
internal ambient temperature.
The product number of the electronic module to monitor oil temperature is
defined in the functions installed in the module as follows:
111L--___--___
| |
| |---- M = Modbus, X = no Modbus
|
|------------- A = milliamp loop, X = no milliamp loop
The base unit is 111L-X-X
The product number of the electronic module to monitor Winding temperature is
defined in the functions installed in the module as follows:
111W--___--___
| |
| |---- M = Modbus, X = no Modbus
|
|------------- A = milliamp loop, X = no milliamp loop
The base unit is 111W-X-X
One or Two units may be specified to mount in a weatherproof enclosure
forming a 111-300 system. These model numbers are:
! 111-300-1 ⇒One 111W-X-X
! 111-300-2 ⇒One 111W-A-X
! 111-300-3 ⇒One 111W-X-M
! 111-300-4 ⇒One 111W-A-M
! 111-300-5 ⇒One 111W-X-X and One 111L-X-X
! 111-300-6 ⇒One 111W-A-X and One 111L-A-X
! 111-300-7 ⇒One 111W-X-M and One 111L-X-M
! 111-300-8 ⇒One 111W-A-M and One 111L-A-M

Electronic Temperature Monitor
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QualiTROL
QualiTROLQualiTROL
QualiTROL
QualiTROL has been a leader in supplying pressure, liquid level, and
temperature controls since 1945. An ISO 9001 system certified company; we are
committed to providing you with quality and reliability, both in our products and
in our service.
About This Manual
About This ManualAbout This Manual
About This Manual
This manual provides all the information you will need to install, setup, and
operate your QualiTROL Electronic Temperature Monitor. It is organized into
the following sections:
Installation — Step-by-step, illustrated instructions to guide you through
mounting, supplying power to, and wiring your Temperature Monitor.
Operation — A description of use during transformer operation, as well as easy
instructions on how to perform a system test while the transformer is in service.
Functional Specification — A detailed functional specification of the unit.
Setup Software — Step-by-step, instructions to guide you through configuration
of the Temperature Monitor to meet your specific needs.
Appendix A — Step-by-step, instructions to guide you through the manual
adjustment of setpoints of the Temperature Monitor.
Appendix B — Guides you through special requirements in order to use the
Temperature Monitor in the European community.
Appendix C — Step-by-step, instructions to guide you through setup of the
Temperature Monitor for use with Modbus communications.

Electronic Temperature Monitor
6
I
II
INSTALLATION AND
NSTALLATION ANDNSTALLATION AND
NSTALLATION AND W
WW
WIRING
IRINGIRING
IRING
Mounting of the Temperature Monitor
Mounting of the Temperature MonitorMounting of the Temperature Monitor
Mounting of the Temperature Monitor
The 111-300 mounts on any flat surface outside of the control cabinet and is
secured by four (4) fasteners thru the mounting holes provided. See Figure 2 for
enclosure details.
Figure 2. Enclosure Dimensions
Each 111L/111W unit is mounted in a standard square ¼ DIN (3.622”[92mm])
cutout in the swing-out panel of the enclosure and is secured from the rear of the
unit by a push on panel clamp.
Primary Power
Primary PowerPrimary Power
Primary Power
Primary power is connected to TB1-19 and TB1-21 with an earth ground
connection to TB1-20. Note that because of the wide range of possible input
voltages, the user must provide fuse or circuit breaker protection for the
appropriate primary power input, external to the unit. The unit requires
approximately 2 watts of power. See Figure 3, wiring diagram for terminal
locations.
Sens
SensSens
Sensors
orsors
ors
The 111L and 111W uses a 100 ohm Platinum RTD (Pt100) mounted in a
universal sensor capable of mounting in any existing Qualitrol thermal well. A
three wire RTD is recommended, a two wire RTD may be used if the lead length
is short. Lead resistance error for a two wire RTD is 1°C per 0.4 ohm of lead
resistance. A 3 wire RTD has 2 wires connected to one end of the RTD and 1
wire connected to the other end. Connect the 2 wires to TB1-34 and TB1-35. The
single wire is connected to TB1-36. When a 2 wire RTD is used, jumper the

Electronic Temperature Monitor
7
terminals used for two wires together (TB1-34 and TB1-35). See Figure 3,
wiring diagram for terminal locations.
The current is picked up from a standard CT current loop (e.g. 0-5A) using a
clip-on CT that clips around a wire of the current loop. This method eliminates
the need to break an existing CT wire and eliminates the direct connection of the
CT signal to the ETM. The 2 wires from the clip-on CT are connected to TB1-
25 & TB1-26. There is no high voltage risk from an open circuit on the clip-on
CT output wires.
NOTE:The CT is ordered separately and must be supplied by Qualitrol.
The clamp-on CT is a transducer, and not simply a CT; the 111W
model will not accept a CT current input directly.
Relay Contacts
Relay ContactsRelay Contacts
Relay Contacts
FAN #1 - SPDT (form C) contacts are provided on terminals TB1-7, TB1-8 &
TB1-9. Terminals 8 & 9 are closed when the fans are ON and terminals 7 & 8
are closed when the fans are OFF. The relay is normally de-energized (non-
failsafe).
FAN #2 - SPDT (form C) contacts are provided on terminals TB1-4, TB1-5 &
TB1-6 to control fan bank #2. This relay can be set to be either normally
energized so loss of power will turn fans ON or normally de-energized. The
default state is de-energized (failsafe).
ALARM - SPDT (form C) contacts are provided at TB1-16, TB1-17 & TB1-18
to indicate that an alarm temperature value has been reached or that a fault has
been detected. This relay normally energized so loss of power will cause an
alarm to be indicated.
TRIP - SPDT (form C) contacts are provided at TB1-1, TB1-2 & TB1-3 to
indicate that the temperature being monitored has reached the trip state. This
relay is usually set to be de-energized in the normal state, so that loss of primary
power will not cause a trip.
See Figure 3, wiring diagram for terminal locations.
mA Output
mA OutputmA Output
mA Output
If the optional milliamp output current loop is installed, it is available at TB1-32
& TB1-33 and provides a current proportional to the present temperature. TB1-
32 is the positive (+) terminal. See Figure 3, wiring diagram for terminal
locations. Refer to the Setup Software and Appendix A sections of this manual
for methods to select the mA output to be 0-1mA or 4-20mA. The default setting
is 4-20mA.
RS
RSRS
RS-
--
-232 Link
232 Link232 Link
232 Link
An RS-232 data link is provided for setting up the 111L or 111W ETM. TB1-13
(DB9-3) is the data going to the ETM. TB1-14 (DB9-2) is the data coming from
the ETM. TB1-15 (DB9-5) is the ground connection for the data link.
Connecting these terminals to the serial port of a computer and using
QualiTROL furnished software allows the user to change setup parameters. See
Figure 3, wiring diagram for terminal locations. Refer to the Software Setup
section of this manual for more detailed information.

Electronic Temperature Monitor
8
NOTE: Turn off input power, as well as relay control power when
installing/removing RS-232 wires.
NOTE: Wires should not be left connected to these terminals after the unit
is installed.
RS
RSRS
RS-
--
-485 Link (optional)
485 Link (optional)485 Link (optional)
485 Link (optional)
The optional RS-485 data link provides a method of communicating with a
remote master station using Modbus RTU protocol. Either a 2 wire or a 4 wire
connection may be used. With a 4 wire connection TB1-28 & TB1-29 are the
data transmitted from the ETM and TB1-30 & TB1-31 are the data received by
the ETM. When used in a 2 wire system, connect one wire to TB1-28 and TB1-
30. Connect the other wire to TB1-29 and TB1-31. See Figure 3, wiring diagram
for terminal locations. Refer to Appendix B of this manual for additional
information.
Figure 3. Wiring Diagram Label
Heater Kit (optional)
Heater Kit (optional)Heater Kit (optional)
Heater Kit (optional)
The optional enclosure heater kit (KIT-031-1), (sold separately), is intended for
use with any 111-300 series unit. Two (2) adhesive backed kapton heaters @ 25
watts each, (supplied with the kit) are to be installed on the reverse side of the
swing-out panel door approximately as shown in Figure 3a. It should be noted
that the “Oil” temperature unit should be used for the wiring connections as well
as for the software configuration. The “Winding” unit can be configured for this
function, but typically, the winding trip relay is required for trip function.
For units powered by 120 VAC or 240 VAC input, connections should be made
as follows:
• 120 VAC – wire heaters in parallel.
• 240 VAC – wire heaters in series.
• Connect one heater lead wire to supply power (TB1-21) and the
remaining heater lead wire to the normally-open (N/O) contact of the 4th
(Trip) relay (TB1-3).

Electronic Temperature Monitor
9
• Install a jumper wire (#18 AWG minimum) from supply power (TB1-19)
to the common terminal of the 4th (Trip) relay (TB1-2).
For units powered by DC input, connections should be made as follows:
• The customer must provide a separate AC source for heater operation
and a terminal block for wiring connections.
• The unit will be wired as noted above for 120/240 VAC with the
exception that the added terminal block will be used to supply the AC
power and be a substitute for terminals TB1-19 & TB1-21.
In the customer software, ensure that the device used to control the heater is in
non-failsafe condition, and that the unit is configured to operate the Trip relay
from ambient temperature.
Figure 3a. Heater Installation and Wiring

Electronic Temperature Monitor
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O
OO
OPERATION
PERATIONPERATION
PERATION
Temperature Display
Temperature DisplayTemperature Display
Temperature Display
The temperature display consists of a 3 digit, 7 segment LCD display that can
show temperatures from 0°C to 200°C. The display alternates between the
present temperature and the maximum stored temperature at two (2) second
intervals. While the maximum stored temperature is displayed, the MAX icon is
displayed. Refer to Figure 4, Display Window.
Status Icons
Status IconsStatus Icons
Status Icons
Four icons are provided to indicate the status of the output relays, they are
labeled 1, 2, 3 and 4. Refer to Figure 4, Display Window.
• An Alarm icon 1 indicates the state of the Fan #1 relay.
• An Alarm icon 2 indicates the state of the Fan #2 relay.
• An Alarm icon 3 indicates that the ALARM relay is in the ALARM
state.
• An Alarm 4 icon indicates that the TRIP relay is in the TRIP state.
• A Triangle with an “!” in it indicates that FAULT has been detected.
This will also cause the Alarm and the Fan icons and relays to be ON.
• A MAN icon, when displayed, indicates that the Fans have been
manually turned ON. When this icon is OFF the fans are controlled by
the setpoints of the Fans relays.
Figure 4. Display Window
Push
PushPush
Push-
--
-Buttons
ButtonsButtons
Buttons
Pressing the MAN / FAN button will force the Fan relays to activate. The Fans
will stay ON until the button is pressed again. A MAN icon on the display
indicates whether the manual FAN ON function is active. Pressing the button to
release the MAN / FAN function while the temperature is above the FAN ON
setpoint will turn OFF the MAN / FAN icon but will NOT turn OFF the Fans.
Thus the MAN / FAN button can force the Fans ON but cannot force the Fans
OFF. Refer to Figure 5, front panel.
Pressing the TEST button will start a TEST sequence. The TEST sequence does
the following at two (2) second intervals:

Electronic Temperature Monitor
11
111W:
• Display the FAN #1 ON temperature setpoint and turn ON the #1 icon.
• Display the FAN #2 ON temperature setpoint and turn ON the #2 icon.
• Display the ALARM temperature setpoint and turn ON the #3 icon.
• Display the TRIP temperature setpoint and turn ON the #4 icon.
• Display the temperature inside the ETM.
• Display the present oil temperature.
• Display the present winding current as a % of full scale.
• Display 888 on the temperature display and turn all icons ON.
NOTE: This TEST does not cause any relays to change state.
Pressing the MAX RESET button will clear the memory of the maximum stored
temperature causing the current highest winding temperature to become the new
maximum stored temperature.
111L:
• Display the FAN #1 ON temperature setpoint and turn ON the #1 icon.
• Display the FAN #2 ON temperature setpoint and turn ON the #2 icon.
• Display the ALARM temperature setpoint and turn ON the #3 icon.
• Display the TRIP temperature setpoint and turn ON the #4 icon.
• Display the temperature inside the ETM.
• Display 888 on the temperature display and turn all icons ON.
NOTE: This TEST does not cause any relays to change state.
Pressing the MAX RESET button will clear the memory of the maximum stored
temperature causing the current highest winding temperature to become the new
maximum stored temperature.
Figure 5. Front Panel

Electronic Temperature Monitor
12
Fan Exerciser
Fan ExerciserFan Exerciser
Fan Exerciser
If enabled, the Fan Exerciser will turn the fans ON for the exerciser run time at
time intervals set during the ETM configuration. Timing starts with a run time
interval when power is applied to the unit or when the unit is reset. Thus if the
run time is set for one minute, the fans will be on for one minute after power is
turned on.
Fan Bank Switching
Fan Bank SwitchingFan Bank Switching
Fan Bank Switching
If enabled, the Fan Bank Switching will swap the setpoints of Fan #1 and Fan #2
after each actuation. For example: Fan #1 setpoint is set below that of Fan #2.
The temperature goes up and Fan #1 actuates, the temperature goes down. The
temperature goes up again and this time Fan #2 actuates at the Fan #1 setpoint
and Fan #2 actuates at the Fan #1 setpoint. The next cycle Fan #1 again operates
before Fan #2. This evens the wear on the Fan #1 and Fan #2 motors and
contactors.

Electronic Temperature Monitor
13
F
FF
FUNCTIONAL
UNCTIONALUNCTIONAL
UNCTIONAL S
SS
SPECIFICATIONS
PECIFICATIONSPECIFICATIONS
PECIFICATIONS
Performance: Input Power: 80 VAC to 265 VAC or
20 VDC to 280 VDC
2 Watts
Measurement
Range: 0°C - 200°C
Display
Resolution
(increments):
1°C
Accuracy: ±1% (2°C)
Memory
Retention: 40 years (with power off)
Contact Ratings
All Relays: Volts Resistive Inductive
250 VAC 5.0 amps - - - - - -
30 VDC 5.0 amps - - - - - -
300 VDC 0.2 amps - - - - - -
Remote Output
Current Loop: 0 to 1 mA = into 10,000Ωmax. load
4 to 20 mA = into 500 Ωmax. load
Accuracy ±1% of full scale display
Environment: Operating
Temperature: -30°C to +72°C
Storage
Temperature: -50°C to +85°C
Relative
Humidity: to 90% non-condensing
Hi-pot: 2,300 VAC 50/60 Hz for 1 minute, relay contact and power to sensor
terminals and earth ground.
Vibration: 50/180 Hz @ .004 inch displacement.
Shock: 10 G’s in 3 orthogonal planes.
Electromagnetic
Compatibility: EN50081-2 (emissions) EN61000-6-2-2 (immunity)
EN61010-1 (safety)
Mechanical:
(Wall Mount
Weatherproof
Box)
Box
Dimensions: Height = 11.7” [297mm] Width = 9.3” [236mm]
Depth = 7.13” [181mm]
Weight: 6.5 lbs.
Mounting: (4) #¼ screws on a 10.74” [272.8mm] x 6.00” [152.4mm] pattern
Approvals: Declaration of Conformance CE
This product has been tested for conformity to the applicable sections of EN50081-2 (emissions),
EN61000-6-2-2 (immunity) and EN61010-1 (safety).

Electronic Temperature Monitor
14
S
SS
SETUP
ETUPETUP
ETUP S
SS
SOFTWARE
OFTWAREOFTWARE
OFTWARE
NOTE: The software is NOT supplied with every unit – It can be used to
configure multiple varieties of units. It is ordered as a separate line
item (KIT-032-1). This includes a CD with all of the software, and
a communications cable to connect it to all of the various models.
The ETM Configuration software is a Windows based program that allows the
user to setup parameters in Qualitrol Model 111 and Model 118 series electronic
temperature monitors via the RS232 port of the ETM. There is some variation in
what parameters can be set in each model. The software only shows parameters
available to the model being configured.
The software allows configuration values to be entered into a setup screen and
then sent to the ETM and/or saved to a configuration file for future use.
Operation of the software consists of these menu selections.
Installation
InstallationInstallation
Installation
Run SETUP.BAT on the installation CD. This will create a directory
C:\QualiTROL on the hard drive, and will install the program and default
configuration files in that directory. It will also put an icon on the desktop to
start the program.
Files
FilesFiles
Files
When the program first starts, you must either select an existing configuration
file or start a new configuration file. Until a file is assigned or selected the other
menu items are not available.
NEW – Use the NEW button or use File / New Config File to start a new
configuration. The program will ask what Model you are going to configure and
then will use the standard Windows screen to allow you to assign a file name to
the configuration file.
OPEN – Use the OPEN button or use File / Open Existing Config File to
select an existing configuration file. The configuration file contains the type
ETM being configured. If the default file is chosen, the values can be changed
and stored as the new default values, or they can be stored as a different
configuration name.
Select Comm Port – Selects the computer Comm Port to use to talk to the ETM
Exit- Exits the program
Configuration
ConfigurationConfiguration
Configuration
View / Change Config – Opens a screen that allows the entry of
configuration information. One can then download the configuration to an ETM
and / or save it to a configuration file. It is also possible to upload the existing
configuration from the ETM to the Configuration screen
The configuration Software allows the user to set up the following parameters of
the ETM:

Electronic Temperature Monitor
15
• Fan / Alarm / Trip setpoint and switching differential (hyteteresis) can be set
to determine at what temperature the relays turn on and off.
• Trip relay can be set to failsafe (normally energized) or not failsafe
(normally de-energized).
• Trip relay can be set to operate from (internal) ambient temperature. This
feature is activated when the optional heater kit is installed.
• Fan Exerciser – the fan exerciser function can be turned ON or OFF. When
it is ON, the time between turning the fans on, and the run time can be set.
• Fan Bank Switching – if the fan bank function is enabled, the first fan bank
to come on will alternate between the two fan banks to even out the wear on
the fan motors.
• SCADA Remote Output can be set to 0-1 mA or 4-20 mA (if option
installed).
• The communications parameters for the optional RS-485 output can be set
(if option installed).
• Send configuration data to ETM – This will cause the displayed
configuration data to be written to the ETM. After the data is changed in the
ETM memory, the ETM will reset to activate the new values.
• Send configuration data and winding rise to ETM – This will cause the
displayed configuration data, and the winding rise curves to be written to the
ETM. After the data is changed in the ETM memory, the ETM will reset to
activate the new values.
• Get configuration data from ETM – This reads the configuration currently in
the ETM and displays that data on the screen.
• Save – This will save the current configuration to the current open file (if it
is the default file, it will overwrite it).
• Save as – Allows the current configuration to be saved to a new file name or
different path.
• Done – exits this window.
Print Configuration - Prints the configuration screen and also prints the
winding rise screen.
Winding Rise
Winding RiseWinding Rise
Winding Rise
The 111W stores winding rise tables that allow the calculation of winding
temperature from the oil temperature and the winding current.
Create Winding Rise Data – This screen provides for the entry of
information allowing the calculation of three different winding rise tables. One
table with only convection cooling, one table with the first stage of cooling on
and one table with all cooling on. To calculate the winding rise tables, a single
winding rise temperature (above oil temperature) at a known current is required
for each stage of cooling, along with an exponent for the winding rise equation
(1.6 for most transformers). If the gradient value for each cooling stage is not

Electronic Temperature Monitor
16
known, then the values for each stage should be made the same. At no time
should zeros be entered as values for these variables.
NOTE: The current is entered as a % of full-scale current. The full scale current
is the 100% value used in the “Calibrate CT” screen, which typically is
the secondary CT current at the extreme overload condition.
A winding rise time constant must also be entered. One time constant is defined
as the time to reach 63.2% of the ultimate value for the load current. The
winding temperature reaches 98% of its ultimate value in 4 time constants after a
step change in current. A typical time constant is 5 to 8 minutes.
NOTE:The Time Constant can NOT be set to zero. If a very short time constant
is desired, set it 0.1 minutes
An example:
A 30/40/50 MVA 132/32kV single phase transformer with a instrumentation CT
of 2400/5 on the secondary side is to configured.
In ONAN mode: 30MVA/32kV*5/2400=1.95 amps
In first stage cooling mode: 40MVA/32kV*5/2400=2.60 amps
In second stage cooling mode: 50MVA/32kV*5/2400=3.25 amps
The full scale current for the CT secondary is 5 amps which corresponds to a:
100%*2400Amps*32kV/50MVA=153% overload rating for the CT.
From the transformer manufacturers heat rise test data you obtain the average
winding rise temperature above oil temperature, or the hottest spot winding
temperature above oil temp (you must decide which gradient is to be used to turn
on cooling). Let’s say the gradient is average winding temp, and for no cooling
the temperature rise above oil temperature is 15°C, for first stage cooling the
gradient is 10°C, and for both stages of cooling the gradient is 8°C.
In this case, the values to enter into the “Winding Rise” table would be:
No cooling: 15°C and 100%*1.95/5.00=39%
One stage of cooling: 10°C and 100%*2.60/5.00=52%
Both cooling stages: 8°C and 100%*3.25/5.00=65%
Get Data from Unit – This uploads data from an ETM that can then be
downloaded to another ETM
Monitor
MonitorMonitor
Monitor
The 111W models send out continuous data on the RS232 port.
Display Values from Unit – When the START button on this screen is pressed
the data from the ETM is displayed. This data is updated several times a
second until the DONE button is pressed. The values displayed vary with
the model, but in all cases the present temperature readings and max
stored temperature readings are displayed.

Electronic Temperature Monitor
17
Calibrate
CalibrateCalibrate
Calibrate
There may be occasions when it is desired to check or change the calibration of
the CT input to the 111W.
Calibrate CT – The calibrate screen contains help messages which lead one thru
the calibration process:
1. The present CT reading is displayed as % of Full Scale. This can be
compared to the actual value of current thru the CT to determine if
calibration is required. If calibration is required press the Start Calibration
button
2. Set the current thru the CT to zero and press the CT current is ZERO button.
3. Set the current thru the CT to a known value, enter the value as % of Full
Scale and press the Send Calibration Data to ETM button. It is
recommended that the known value be 100% of the full scale of the
instrumentation CT secondary being passed through the provided clamp on
CT (Note: The CT is ordered separately).
NOTE:The maximum value of the CT current as a percentage is 100%. It is
necessary that the full scale value corresponding to this 100% takes into
account overload conditions of the transformer. For example: A 5 amp
clamp on CT should only be used with a 5 amp transformer
instrumentation CT, if the maximum current of the transformer, even
during overload, corresponds to 5 amps or less on the instrumentation
CT. Any current greater than this 100% value will be considered a
failed sensor.

Electronic Temperature Monitor
18
A
AA
APPENDIX
PPENDIXPPENDIX
PPENDIX A
AA
A –
––
– M
MM
MANUAL
ANUALANUAL
ANUAL S
SS
SETPOINT
ETPOINTETPOINT
ETPOINT A
AA
ADJUSTMENT
DJUSTMENTDJUSTMENT
DJUSTMENT
Although the preferred method of changing the unit setup is to use a computer connected to the RS-
232 port, there may be cases where it is desired to change a setpoint in the field when there is no
computer available. The model 111L/111W has this capability by using the following procedure:
• Push and hold the MAX MEMORY RESET button for 5 seconds. The unit
will stop scrolling. The #1 icon will be on and the display will show the Fan
1 setpoint. (This will also reset the Max Memory)
• Use the TEST and MAX MEMORY RESET buttons to step the Fan 1
setpoint up or down.
• Push the MAN / FAN button. The #2 icon will be on and the display will
show the Fan 2 setpoint.
• Use the TEST and MAX MEMORY RESET buttons to step the Fan 2
setpoint up or down.
• Push the MAN / FAN button. The #3 icon will be on and the display will
show the Alarm setpoint.
• Use the TEST and MAX MEMORY RESET buttons to step the Alarm
setpoint up or down.
• Push the MAN / FAN button. The #4 icon will be on and the display will
show the Trip setpoint.
• Use the TEST and MAX MEMORY RESET buttons to step the Trip setpoint
up or down.
• Push the MAN / FAN button. The display will show the mA loop type – 0nA
for 0 to 1 mA, 4nA for 4 to 20 mA. Push the TEST or MAX MEMORY
RESET buttons to change type of mA loop.
• Push the MAN / FAN button. The display will show whether the Fan Bank
switching function is On (bSy) or Off (bSn). Push the TEST or MAX
MEMORY RESET buttons to change between bank switching On and Off.
• Push the MAN / FAN button. The display will show whether the Fan
Exerciser is On (Fey) or Off (Fen). Push the TEST or MAX MEMORY
RESET buttons to change between Fan Exerciser On and Off.
• Push the MANUAL FAN button. The new settings are saved and the unit
returns to normal operation.
If during the above process no button is pushed within 30 seconds, the unit
returns to normal operation.
When the setpoint is changed using the above technique the switching
differential is preserved. Thus, if the original fan setpoint is 190°C with a 10°C
switching differential, the fans would come on at 190°C and turn off at 180°C.
If the above method is used to change the setpoint to 175°C, then the fans will
turn on at 175°C and off at 165°C.