COMEM MB 103 User manual

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INSTRUCTION MANUAL
Heat Monitoring and Control Instrument for Transformers
“MB 103”
Temperature Control Unit
54105T –MB 103 –
REV0
2

II

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CONTENT:
1SAFETY
1.1 Safety instructions 1
1.2 Specified applications 1
1.3 Safety notes on equipment operation 2
2TEMPERATURE CONTROL UNIT TYPE “MB 103”
2.1 Drawing 3
2.2 Hardware characteristics 4
2.2.1 Front panel 4
2.2.2 Rear panel 5
2.3 Main characteristics 6
2.4 Operation 6
2.5 Temperature display 6
2.6 Programming 6
2.6.1 S4 profile 8
2.7 Correct operation checks 9
2.8 Signal tests 9
2.9 Zeroing procedure 9
2.9.1 Factory settings 10
3INSTALLATION 10
4CONNECTION
4.1 Power supply 10
4.2 Inputs 10
4.3 Relay tests 10
5OPERATION AND MAINTENANCE
5.1 Starting 11
5.2 Maintenance 11
5.3 Fault monitoring 12
5.4 Movement, transport and storage 12
6SOFTWARE
6.1 Introduction 13
6.2 Installation 13
6.3 Use 14
6.3.1 Parameters 15
6.3.2 Status 16
6.3.3 Temperatures diagram 17

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1. SAFETY
1.1 Safety instructions
Make sure that the personnel who install, put into service and operate the
“MB 103 Temperature Control Unit”:
·Are technically qualified and competent;
·Fully comply with these assembly instructions.
Improper operation or misuse could endanger:
·Life and limb
·The equipment and other property of the operator
The safety instructions in this manual are shown in three different forms to emphasize the importance of the operation.
1.2 Specified applications
The “MB 103” Temperature Control Unit is used in resin or dry type transformers and can also be easily adapted for use in oil
transformers.
The “MB 103” Temperature Control Unit uses PT100 temperature probes for constant monitoring of transformer temperature in four
points: for example, three on the transformer winding columns and one on the machine's magnetic circuit.
If the transformer fails to function correctly and its temperature rises, the Temperature Control Unit generates an electric alarm signal.
If the temperature reaches danger level, the unit generates a second intervention level. This can be connected to a machine stop switch
that functions independently of the alarms.
A cooling system control program is also implemented in the unit.
WARNING
This information indicates particular danger to life and health.
Disregarding such a warning can lead to serious or fatal injury.
CAUTION
This information indicates particular danger to equipment and/or other property of the user.
Serious or fatal injury cannot be excluded.
NOTE
These notes give important or specific information concerning the equipment or how to work with the
equipment.

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1.3 Safety notes on equipment operation
The electrical installation must conform to the national safety regulations.
The MB 103 Temperature Control Unit has double insulation. Earthing is not required.
CAUTION
The wires must be fixed properly.
CAUTION
The MB 103 Temperature Control Unit must not be installed near sources of electromagnetic interference.
MB 103 conforms to the following standards:
·EN 50081-2: Electromagnetic compatibility - Generic emission standard
Part 2: Industrial environment.
·EN 50204: Radiated electromagnetic field from digital radio telephones - Immunity test
·EN 55011: Industrial, scientific and medical equipment - Radio-frequency disturbance
characteristics - Limits and methods of measurement.
·EN 61000-3-2: Electromagnetic compatibility (EMC) - Part 3-2: limits - Limits for harmonic
current emissions (equipment input current up to and including 16 A per phase).
·EN 61000-6-2: Electromagnetic compatibility (EMC) - Part 6-2: Generic standards -
Immunity of industrial environments.
·EN 61000-4-2: Electromagnetic compatibility (EMC) - Part 2-4: Environment -
Compatibility levels in industrial plants for low-frequency conducted disturbances
·EN 61000-4-4: Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement
techniques - Fast transient immunity test.
·EN 61000-4-5: Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement
techniques - Surge immunity test.
·EN 61000-4-6: Electromagnetic compatibility (EMC). Part 4: Testing and measurement
techniques. Section 6: Immunity to conducted disturbances, induced by radio-frequency
fields.
WARNING
All relevant fire protection regulations must be strictly observed.

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2. “MB 103” TEMPERATURE CONTROL UNIT TYPE
2.1 Drawing
External dimensions (Fig. 1) of the “MB 103” Temperature Control Unit:
FRONT PANEL REAR PANEL
SIDE VIEW
Fig. 1
96 mm
96 mm
107 mm9 mm 10 mm

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2.2 Hardware characteristics
·Container: self-extinguishing ABS
Dimensions: box 170 mm x 110 mm x 105 mm (DIN 43700)
·Front panel: self-extinguishing Exon
Dimensions: 96 mm x 96 mm
·Weight: 0.5 kg
·Display:
Temperature: 3 numbers, each with 7 segments
Channel: 7 segments
·LEDs 19 signals
·Terminal board: withdrawable and polarized, in accordance with IEC 998-1 and IEC 998-2-1
·Climatic category 40/11021 according to IEC
·Power supply: universal, range 24-220 V ± 10% in DC or AC at 50 Hz ± 2% frequency or 12V in DC
·Operating temperature: -20°C +60°C
·Inputs: 4 PT100 (or PTC) resistance thermometers, range from -10°C to 200°C
·Outputs: 4 relays with 5 A contacts, 250 V A.C.
·Memory: EEPROM with data retention for more than 10 years
·Precision: ± 1% of full-scalevalue + 1digit
·Insulation: Double galvanic insulation between power supply, microprocessor and temperature probes (2500 V test voltage)
·Humidity: 90% without condensation
·Consumption: 4 VA
·Construction in accordance with regulations
2.2.1 Front panel
Fig. 2
Number of
probe
LEDs
- fault
- programming
- fan
-
test procedure
LEDs
- probe operation
- alarm threshold exceeded
- release threshold exceeded
- Probe temperature
- Probe state:
SSP (probe in short-circuit)
OPP (probe interrupted)
LEDs:
- automatic mode
(CH with higher temperature)
- manual mode
- maximum temperature reached
- Increase
-
Decrease
- LED Test
- Type of display
(AUTO, MAN, MAX)
- Programming
- Quit test
Reset

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2.2.2 Rear panel
Fig. 3
Power supply
Terminal number Input Description of operation
1PWR From 24 to 220V AC to DC universal power supply with +/- 10% variations allowed
2Earth Must be connected using cable at least 1.5 mm in section
3PWR From 24 to 220V AC to DC universal power supply with +/- 10% variations allowed
4Terminal not connected
5 0 Input for 12V DC power supply
6+12 Input for 12V DC power supply
Probe inputs (PT100)
Terminal number Input Description of operation
7 - 8 SD1PF Probe 1 cold pole input
9SD1PC Probe 1 hot pole input
10 - 11 SD2PF Probe 2 cold pole input
12 SD2PC Probe 2 hot pole input
13 - 14 SD3PF Probe 3 cold pole input
15 SD3PC Probe 3 hot pole input
16 - 17 SD4PF Probe 4 cold pole input
18 SD4PC Probe 4 hot pole input
Auxiliary circuits
Terminal number Input Description of operation
19 ALL1 - C Terminals of ALARM circuit
20 ALL1 - NC
21 ALL1 - NA
22 ALL2 - C Terminals of RELEASE circuit
23 ALL2 - NC
24 ALL2 - NA
25 FAULT - C Terminals of FAULT circuit
26 FAULT - NC
27 FAULT - NA
28 FAN - C Terminals of VENTILATION circuit
29 FAN - NC
30 FAN - NA
RS
-
232 port
Auxiliary
circuits
Probe
connection
Supply
connection

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2.3 Main characteristics
System programmed directly from the front panel.
Each channel can be selected independently.
Automatic display of max. temperature and relative channels.
Software configuration for controlling inputs and outputs.
Maximum temperature memorized for each channel.
Relay test command.
Programmable ventilation settings.
Up to four channels during activation.
Two thresholds: one alarm threshold and one release threshold with change-over contacts.
Automatic probe fault indicator with change-over contact.
2.4 Operation
The software immediately detects, saves and signals any temperature irregularities in the automatic mode.
The entire programming procedure controls both the requests and data entered in the smart mode.
The Temperature Control Unit settings are standard factory values that can be modified as required. The alarm threshold is 140°C with
release at 160°C and ventilation excluded.
The 19 LEDs on the display allow the MB 103 unit to clearly signal and handle information concerning the temperature situation.
2.5 Temperature display
The Temperature Control Unit always switches on in the automatic mode.
To change the display, press
: when the key is pressed, the operating mode of the instrument changes in sequence:
“AUTO”, “MAN” and “MAX”
AUTO: Automatic operation
Both the maximum temperature and the channel this measurement comes from are
displayed in the automatic operation mode.
MAN: Manual operation
The temperature of each sensor is displayed in real time in the manual operation mode. The arrow keys are used to
scroll the active channels.
MAX: Maximum operation
The maximum temperature reached by each probe is displayed in the maximum operation mode. The arrow keys are used to
scroll the active channels.
2.6 Programming
Press the key for 3 seconds to program.
The “PROG” LED will light up on the instrument panel and the letter “S” followed by a number will appear on the display.
Use the arrow keys to re-program the operating mode of the unit as shown in the table below.
The table contains four pre-defined profiles for programming the active channels and a fifth profile.
DISPLAY
MODE
PROG
CHANGE

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Profile
Setting
Active channels
Channels with active ventilation
CH1, CH2 and CH3 CH 4 CH1, CH2 and CH3 CH4
S 0 YES NO NO -
S 1 YES YES YES YES
S 2 YES YES NO NO
S 3 YES NO YES -
S 4 Each channel can be activated as well as the relative ventilation
Display request
sequence Profile Description
A nnn 0,1,2,3 Setting of the alarm threshold common to the channels activated by profile selection (see previous
table)
t nnn 0,1,2,3 Setting of the trip threshold common to the channels
activated by profile selection (see previous table)
L nnn 1,3 Setting of the ventilation stop threshold common to the channels activated by profile selection (see
previous table)
H nnn 1,3 Setting of the ventilation start threshold common to the channels activated by profile selection (see
previous table)
NOTE
For profiles 0, 1, 2 and 3, the settings include one single alarm
threshold and one single release threshold common to all activated
channels.
The ventilation setting (profiles 1 and 3) will also have common
thresholds.
Profile 4 is useful when maximum flexibility is required since any
combination of active channels can be selected, while activation of
the alarm and release thresholds and ventilation can be set for these
channels independently.
Once the required operating profile has been selected, it must be
confirmed by pressing the key.
Programming proceeds with a request for entry of the alarm and
release thresholds and, for the profiles concerned, entry of the
ventilation activation and deactivation thresholds as shown in the
table.
PROG
CHANGE

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Use profile S 4 for maximum freedom when making the settings.
Select S 4 and press the key for each confirmation.
if this option has been selected, programming will follow the Flow-Chart below (consult the previous note when changing and confirming
the “n” and “nnn” values):
2.6.1 S4 profile
n CH1
n = 1
n = 0
S 4
A nnn
t nnn
n FAN
n = 1
n = 0
L nnn
H nnn
n CH2
n = 1
n = 0
A nnn
t nnn
n FAN
n = 1
n = 0
L nnn
H nnn
n CH3
n = 1
n = 0
A nnn
t nnn
n FAN
n = 1
n = 0
L nnn
H nnn
n CH4
n = 1
n = 0
A nnn
t nnn
n FAN
n = 1
n = 0
L nnn
H nnn
F Ftm
F nn
NOTE
Entry of a value other than zero for the F FtM parameter, under the F nn item,
specifies a time interval in hours after which ventilation will function for 5
minutes, regardless of the temperature present.
This function is available even when ventilation has not been applied to any of
the active channels.
Each channel can have different values for each threshold and ventilation
control can occur with any combination of channels.
PROG
CHANGE
NOTE
Confirmation of “nnn” can be displayed at any moment by pressing the key.
Use the arrow keys to make changes.

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2.7 Correct operation checks
The unit features two test levels to ensure that the switchboard is reliable and the state signaled correctly.
The first level is dedicated to the front panel signaling LEDs,
while the other checks to make sure that the command relay functions properly.
2.8 Signal tests
Press the on the control panel to find out whether there are any faulty components.
All 19 LEDs and the display segments will light up for 2 seconds.
2.9 Zeroing procedure
Resetting the re-entered fault signal.
If a probe is faulty, the Temperature Control Unit indicates:
• release relay “Fault”
• the “alarm”, “trip” and “fault” LEDs come on
• the fault channel is displayed
• an error message is displayed alongside the fault channel:
SSP: probe short-circuited
OPP: probe interrupted
If the fault is intermittent (as in the case of faulty cables), the faulty sensor can be safely identified when the release signal returns since
the LED continues to flash.
To reset the fault signal, press for two seconds until the FLt signal appears on the display.
The fault signal reset function can be used in both the automatic and manual modes.
How to reset the maximum temperatures detected:
The function allowing the detected maximum temperatures to be reset is only available in the maximum log display mode ( “MAX”).
This function allows the maximum logs to be reset to the current temperature values.
To reset, press for two seconds until the rES signal appears on the display.
2.9.1 Factory settings
TEST
BACK
EXIT
CLEAR
CAU
TION
To restore the factory settings, access the programming mode and press
the key for a few seconds.
Do not confirm the last step if you wish to quit the programming mode without
saving the changes made to the thresholds.
Quitting will occur automatically after about 1 minute.
EXIT
CLEAR
PROG
CHANGE

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Parameters to enter
Message
displayed
Set value
Instrument state S n 0
(channels 1, 2, 3 active with ventilation
excluded)
Alarm temperature A nnn 140
Release temperature t nnn 160
Ventilation Start value H nnn 100
Ventilation Stop value L nnn 90
3. INSTALLATION
The MB 103 Temperature Control Unit must be installed inside the switchboard compartment and then fixed in place with the fastening
components and screws provided.
Connect the power supply (universal power supply 24V – 220V AC/DC or 12V DC).
Connect the probes to the relative connection.
Connect the auxiliary circuits (alarm, trip, fault, fan) to the electrical connections.
4. CONNECTION
4.1 Power supply
4.2 Inputs
4.3 Relay tests
The operation test for all the relays can be performed via the menu.
Press the for about 2 seconds until the “TEST” LED comes on.
Press again to test the other relays.
Press to quit the relay test menu (see table below).
WARNING
The instrument reads up to PT 100 probes.
Dust, humidity and corrosive gases should be avoided. Keep away from heat
sources. The maximum operating temperature of the instrument is 60 °C.
WARNING
The power supply is universal: 24V - 220V AC/DC or 12V DC
WARNING
Up to four
PT100
resistance thermometers
TEST
BACK
PROG
CHANGE

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Display
State
Description
n ALL n = 0 Deactivated Alarm relay test
n = 1 Activated
n trP n = 0 Deactivated Trip relay test
n = 1 Activated
n FLt n = 0 Deactivated Fault relay test
(Inversion of the logic that allows faults to be signaled if the supply
is locked can be considered)
n = 1 Activated
n Fan n = 0 Deactivated Ventilation relay test
n = 1 Activated
5. OPERATION AND MAINTENANCE
5.1 Starting
Power the terminals to start the MB 103 Temperature Control Unit.
5.2 Maintenance
Always perform the following inspections on the dehydrator during scheduled maintenance of the transformer:
·Check the operation of the LEDs.
·Check the operation of the display.
·Check the failure contact.
CAUTION
If possible, group all parts of the instrument in a separate area from the relay
powering section.
Do not install the following components in the same switchboard: high power
teleswitches, counters, relays, thyristors and, especially, phase displacement
units, motors, etc.).
Before applying the MB 103 Temperature Control Unit, wait for the equipment
to reach room temperature (at least 1 hour).

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5.3 Fault monitoring
Fault
Cause
Solution
The instrument fails to
switch on
Faulty power supply Check connection
Power supply protected Remove protection and restore voltage
Fault alarm activated Sensors faulty or wrongly
connected Check and/or invert connections between faulty and operating probes
Temperature indicated
by instrument is wrong
for one or more probes Faulty probes Check Ohm value of probe with
connections disconnected
Probes are connected
correctly but "Fault" LED
comes on Fault is intermittent See: Resetting the re-entered fault
signal (section 2.9)
The instrument is
affected by disturbance Probes are not shielded or shield is not connected Connect probes to shield and earth, but only on instrument side.
If the fault is not mentioned above, please contact:
Comem
S.R. 11 Signolo, 22
36054 Montebello Vicentino (VI) - Italy
Tel [phone] E-mail: [e-mail]
5.4 Movement, transport and storage
All MB 103 Temperature Control Units are shipped inside a cardboard box on a
pallet to facilitate transport and storage.
As soon as the MB 103 Temperature Control Unit is received, the customer
must perform the following operations:
- examine the outer surface of the packaging to make sure it is intact;
- check that there are no breakages.
If damage is discovered, please contact Comem and provide the data in the
shipping list together with the serial number of the instrument.
Comem
S.R. 11 Signolo, 22
36054 Montebello Vicentino (VI) - Italy
Tel [phone] E-mail: [e-mail]
The MB 103 Temperature Control Unit must be stored in a dry place at
temperatures from -20°C to 40°C.

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6. SOFTWARE
6.1 Introduction
The software allows the parameters and temperatures detected by the MB 103 in real time to be displayed.
Create a Log File where all the data can be stored.
6.2 Installation
To install the program used by the MB 103 Temperature Control Unit, insert the CD into the PC drive and wait until for the installation
procedure autorun.
After a few minutes, if the autorun fails to appear, run the “Setup” program by means of “Computer resources” or “Explore resources”.
Fig. 1
Fig. 2
Fig. 3 Fig. 4
Select the installation language
then press OK. (fig. 1)
Click on “Next”. (fig. 2)
Press “Browse”; (
fig. 3
)
Select the destination location of
the installation
and press “OK”; (fig. 4)
Click on “Next”. (fig. 3)

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Fig. 5 Fig. 6
Fig. 7 Fig. 8
The installation procedure has now terminated.
6.3 Use
Once the program has been installed, click on the start Menu: “Start – Programs – MB 103” to run the software.
the following page will appear:
Fig. 9
1
3
2
Click on “Next”.
(fig. 5) and (fig. 6)
Click on “Install”.
(fig. 7)
then on “Finish”.
(fig. 8)
The initial window (
fig. 9
) is divided into
3 parts:
1. Parameters
2. Status
3. Temperatures diagram

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6.3.1 Parameters
In the Parameters area (fig. 10) you can:
Fig. 10
1) choose which RS 232 to enable: COM1 or COM2;
2) establish the graph sampling time (minimum 2s and maximum 600s);
3) start acquiring data with “Start” or stop data acquisition with “Stop”;
4) display the Log File with the “View” button;
5) create the Log File with the “Browse” button;
6) select the Log File sampling time interval from the pull-down menu;
7) view the storage path of the Log File.
The data acquired during the scanning process are stored in the Log File.
The file has a “.csv” type of extension so that it can be consulted using the most widely used spreadsheets (Microsoft Excel, Calc).
In view of the limited number of lines (about 65,500), the program eliminates the oldest data and maintains the most recent ones.
For this reason, the software has been designed to regulate the sampling time interval so as to maintain the most significant data for the
user in its memory (tab. 1).
Sampling time
interval
Historical
data
1 minute 45 days
2 minutes 3 months
6 minutes 9 months
9 minutes 13 months
10 minutes 15 months
Tab. 1
Once data acquisition has been stopped by pressing the “Stop” button, the Log File can be consulted by pressing “View”.
If the required spreadsheet is not displayed, the program must be defined by using “Open with” in “Explore resources” or “Computer
resources” and clicking on Log File with the right key of the mouse (fig. 11).
Fig. 11
1
2
3
4
5
6
7

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To display the Log File correctly, open the required file from “Explore resources” or “Computer resources” and then save with the
normally used spreadsheet extension, using “Save as”.
For example, Microsoft Excel uses extension “.xls” (fig. 12).
Fig. 12
6.3.2 Status
Status (fig. 13) allows you to view the settings of the MB 103:
Fig. 13
·ON will appear if the temperature detection channel 1) is activated, otherwise OFF will appear.
·The following information is displayed for each active channel:
2) the instantaneous temperature value;
3) the maximum temperature value memorized by the unit;
4) the alarm state: GREY is not active, RED if active;
5) the trip state: GREY is not active, RED if active;
6) the trip temperature of the alarm;
7) the trip temperature of the release;
8) the ventilation deactivation temperature;
9) the ventilation activation temperature;
·The letters NA will appear on a level with the Temperature 2), Max 3), Alarm 6), Trip 7), Fan Low 8), Fan High 9) values if not all
channels are active.
1
3
4
5
2
6
7
8
9

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The following information appears in the lower part of the Status area (fig. 14):
Fig. 14
1) the active profile;
2) the “Reset Alarm” key: deletes the active alarms if pressed;
3) the “Reset Graph” key: deletes the data shown in the graph (Fig. 15)
4) the visual AutoFan indication: GREEN if on, GREY if off;
5) the visualF indication: YELLOW if on, GREY if off;
6) the “Help” key to access help online;
7) the “Exit” key to quit the program.
6.3.3 Temperature diagram
The temperature trend detected over time can be viewed in the Temperatures diagram (fig.15):
Fig. 15
Use the Scroll bar (1) to move the x-coordinates so as to display the instants prior to the displayed times.
Press “m” on the keyboard to zoom the graph area. Press “Esc” to go back to the main page.
The words “active scanning” (2) will appear if acquisition is activated, otherwise the message will be “no active scanning”.
1
4
5
7
6
3
2
NOTE
If the Active Profile is number 4 and ventilation is activated (with Fan YELLOW
in colour),
then AutoFan will be GREEN.
AutoFan
turns GREY again when ventilati
on is disabled.
1
2