INSTRUCTION MANUAL
Heat Monitoring and Control Instrument for Transformers
MB 101 Temperature Control Unit
54101T – MB 101 – REV00
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CONTENT: 1. SAFETY 1.1 Safety instructions
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1.2 Specified applications
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1.3 Safety notes on the equipment operation
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2. TEMPERATURE CONTROL UNIT TYPE MB 101 2.1 Drawing
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2.2 Hardware characteristics
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2.2.1 Frontal panel
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2.2.2 Rear panel
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2.3 Main characteristics
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2.5 Operation
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2.6 Temperature view
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2.7 Programming
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2.8 Correct operation checks
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2.9 Signal tests
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2.10 Zeroing procedure
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2.11.1 Factory set values
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3. INSTALLATION
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4. CONNECTION 4.1 Power supply
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4.2 Inputs
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4.2 Relay tests
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5. OPERATION AND MAINTENANCE 5.1 Starting device
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5.2 Maintenance
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5.3 Fault monitoring
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5.4 Movement, transport and storage
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1.
Safety
1.1 Safety instructions Make sure that any persons installing, taking into operation and operating the “MB-101 Temperature Control Unit”:
are technically qualified and competent;
fully comply with these assembling instructions.
Improper operations or misuse could cause danger to:
life and limb
to the equipment and other assets of the operator
Safety instructions in this manual are shown in three different forms to emphasize important information.
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 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.
1.2 Specified applications The MB-101 Temperature Control Unit is used in resin or dry type transformers and also easily adapts for use in oil transformers. The MB 101 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 malfunctions, causing its temperature to rise, the MB 101 Temperature Control Unit nd generates an electric alarm signal. If the temperature reaches danger levels the unit generates a 2 intervention level. This can be connected to a machine stoppage switch that functions independent of the alarms. A cooling system control program is also implemented in the unit.
1.3 Safety notes on the equipment operation 3
Electrical installation is subject to the relevant national safety rules. The MB 101 Temperature Control Unit has double insulation, the ground is not required.
CAUTION The wires have to be fixed properly.
CAUTION The MB 101 Temperature Control Unit does not need to be instalLED near the sources of electromagnetic interference. The MB 101 is in compliance with 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 - Radiofrequency 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 for 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 - Electrical fast transient/burst 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.
2.
MB 101 Temperature Control Unit 4
2.1 Drawing The following are the external dimensions for the MB 101 Temperature Control Unit:
Frontal panel
Rear panel
9 6 m m
96 mm
Side view
9 mm
93 mm
2.2 Hardware characteristics 5
12 mm
Container: self-extinguishing ABS Dimensions: box 92 mm x 92 mm x 105 mm (DIN 43700)
Frontal panel: self-extinguishing Exon Dimensions: 96 mm x 96 mm
Weight: 0.4 kg Display: Temperature: 3 numbers, each number is with 7 segments Channel: 7 segments
LEDs: 6 signal
Terminal board: extractable polarized with IMQ ED622 surveillance certificate in conformity with IEC998-1 (1990) and IEC 998-2-1 (1990)
Climatic category 40/11021 Sec.IEC
Power supply: universal, range 24-240 V in AC or DC
Working temperature device from -20°C to 60°C
Inputs: up to 4 PT100 sensor, range from -10°C to 200 °C
Outputs: 4 relays (250 V ac, 5 A maximum)
Memory: EEPROM with data retention for more than 10 years
Precision: ± 1% on the bottom range value (200 °C) ± 1
Insulation: 2500 V
Humidity: 90 % without condensation
Consumption: 4 VA
Construction in according with
normative
2.2.2 Frontal panel
Shows the feeler temperature indicated by the CH display. Shows SSP ( feeler in short circuit) and OPP (feeler interrupted) messages.
Indicate the number of feeler
LEDs: alarm, trip, fault
LEDs: fan, manual, maximum
Key 2.2.2 Rear panel
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Feeler connection
Supply connection
Electric connections
2.3 Main characteristics System programming directly by frontal panel. Possibility to select independently each single channel. Visualization of max. temperature and the relevant channel in the automatic mode Software configuration to control the inputs and outputs. Memoriation of the max temperature for each channel. Relay test command. Ventilation operation setting which is programmable and connectable to change over contacts of relay Up to four channels during activation. Two alarm thresholds with two change over contacts. Automatic feeler fault indicator with change over contact.
2.4 Operation The software immediately notes, saves and signals any temperature irregularity to the operator, who can intervene with precision. There are two alarm levels for maximum temperature, another alarm for feeler and a command for controlling a cooling system (fan). The entire programming procedure has intelligent control of both the request and data that is inputted. The thermo controller is set with standard factory values (that can be calLED up at any moment); the first channels are activated with a first alarm threshold of 140 °C and a second one of 160 °C. This is why the ventilation option was excluded. The 6 LEDs on the display make it possible for the MB 101 thermo controller to clearly signal and run information regarding the thermal state of the protected apparatus.
2.5 Temperature view 7
The temperature control unit always switches on in the automatic mode. To change the display, press the Display mode
: The pressure on the key makes the instrument operation commute sequentially: “Auto” and “Man” (LED “Man” lights up)
Display mode
and
Enter Test
: the combined pressure on the keys: “Max” (LED “Max” lights up)
Auto: Automatic operation With automatic operation, both the highest temperature and the channel this measurement comes from are displayed. Man: Manual operation With manual operation, the temperature of each sensor in real time is displayed. The arrow keys are used to scroll the active channels. Max: Maximum operation With maximum operation, the maximum temperature reached by each feeler is displayed. The arrow keys are used to scroll the active channels.
2.6 Programming To reach programming, press
and
keys simultaneously for 3 seconds; the letter
“F” appears on the display followed by a number. During the programming phase the “Max” LED on the instrument panel will light up. Using the arrow keys, it is possible to redefine the operational mode of the thermo control according to the table below. The table shows four pre-set profiles for setting the active channels and a fifth profile.
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Profile
Setting effect Active channels
Channels with active ventilation
CH 1, CH2 and CH4
CH 4
CH 1, CH2 and CH4
CH 4
F
0
YES
NO
NO
-
F
1
YES
YES
YES
YES
F
2
YES
YES
NO
NO
F
3
YES
NO
YES
-
F
4
Each channel can be activated, as well as ventilation for each one
Confirmation of “nnn” can be seen on the display at any moment by Enter
pressing the
Test
key.
The arrow keys should be used to modify. If it is necessary to reset the thermo controller with the factory setting, Enter Test
you can simultaneously press the and keys for a few seconds once the programming mode has been entered. To exit from the programming mode without saving the changes made to the thresholds, do not confirm the last step. After approx. 1 minute it will exit automatically.
Display
Profile
Description 9
request sequence A nn n
0,1,2,3
S et t i n g o f t h e a l ar m t h r e s h o l d t h a t i s c o m m o n f o r the channels th at have been activated by the profile cho ice (see previo us table)
t nn n
0,1,2,3
S et t i n g o f t h e t r i p t h r e s h o l d t h a t i s c o m m o n f o r t h e c h a n n e l s t h a t h a v e b e e n a c t i v a te d b y t h e c h o i c e (see previous t able)
1,3
S et t i n g o f t h e v e n t i l a t i o n s t o p t h r e s h o l d t h a t i s c o m m o n t o a l l th e c h a n n e l s t h a t h a v e b e en activated by the profile ch oice (see previou s table)
1,3
S et t i n g o f t h e v e n t i l at i o n s t a r t t h r e s h o l d t h a t i s c o m m o n t o a l l th e c h a n n e l s t h a t h a v e b ee n activated by the profile ch oice (see previou s table)
L nnn
H nnn
Confirmation of “NNN” can be seen on the display at any moment b y Enter
pressing
Test
key.
The arrow keys should be used to modify. If it is necessary to reset the thermo controller with the factory setting, Enter Test
you can simultaneously press the and keys for a few seconds once the programming mode has been entered. To exit from the programming mode without saving the changes made to the thresholds, do not confirm the last step. After approx. 5 seconds it will exit automatically.
2.7 Correct operation checks Two test levels have been introduced to ensure switchboard reliability and correct state signaling. The first is dedicated to the front panel signaling LEDs, the other checks the proper operation of the command relay.
2.8 Signaling tests 10
Enter Test
To see if there are any faulty elements, press the
key on the command panel. All
six LEDs and the display segments light up for 2 seconds.
2.10 Zeroing procedure Resetting the re-entered fault signal If a feeler is faulty the Temperature Control Unit indicates: •
the release relay “Fault”
•
the “alarm” LED, “trip” LED and “fault” LED light up
•
fault channel is displayed
•
error message is displayed near the fault channel: SSP: feeler in short circuit OPP: feeler interrupted If the fault is intermittent (typical in cases of faulty cables), it is still possible to safely discover the fault sensor when the release signal returns due to the continually flashing LED. Enter Test
To zero the fault signal, simultaneously keep
and
pressed for two seconds
once the fault has been corrected. The fault signal reset function can be used in both the automatic and manual display modes. Resetting the revealed maximum temperatures: The revealed maximum temperature reset function is only available in the maximum log display mode ( “MAX” ). This function makes it possible to zero the maximum logs to the Enter
current temperature values. To zero, keep seconds.
Test
and
2.10.1 Factory set values 11
pressed simultaneously for two
Parameter to be set
Display mess age
Instrument state
3.
F
Set value
n
1
Alarm
A
nnn
140
Trip
t
nnn
160
Ventilation stop
L
nnn
90
Ventilation start
H
nnn
100
Installation
The MB 101 Temperature Control Unit has to be installed inside the hole of the switchboard, and then the MB 101 has to be fixed with the fastening components and the screws provided with the equipment. The power supply has to connect to the supply connection (universal power supply 24 V – 240 V ac/dc). The feelers have to connect to the feeler connection. The auxiliary circuits (alarm, trip, fault, fan) have to connect to the electric connection.
Warning The instrument reads up to PT 100 feelers. It is best to avoid dust, humidity and corrosive gases. Keep distant from heat sources. The maximum working temperature of the instrument is 60 °C
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4.
Connection
4.1 Power supply
WARNING The voltage power supply is universal: between 24 V and 240V AC/DC
4.2 Inputs
WARNING Up to four PT100 thermocouples
4.3 Relay tests Enter
Operation of all the relays can be checked from the menu. Press and hold the
Test
key
for approx. 2 seconds until “ALL” is stated and relays state 0 or 1 on the display. Push the key Enter
“UP” to set relays and “Down” to reset, push “FAn”, “FLt”, “ALL”.
Test
key again to proceed with other relays: “trP”,
Display mode
To exit from the test relays menu, press
(see table below).
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Display
State
Description
n = 0 Inactive n ALL
Alarm relay check n = 1 Active
n = 0 Inactive n trP
Trip relay check n = 1 Active n = 0 Inactive
Ventilation relay check
n FAn n = 1 Active
n = 0 Inactive
Fault relay check. (Inversion of the logic that permits the signaling of a breakdown in case of lock of supply can be noted)
n FLt n = 1 Active
5.
Operation and maintenance
5.1 Starting device The MB 101 Temperature Control Unit starts when the voltage power supply is applied across the terminals. WARNING If possible, group all pieces of the instrument in an area that is separate from the relay power section. Avoid placing the following in the same panel: high power teleswitches, counters, relays, thyristors and, in particular, phase displacement power groups, motors, etc. Before applying the MB 101 Temperature Control Unit, wait for the equipment to reach room temperature (at least 1 hour).
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5.2 Maintenance During scheduled checks of the transformer, we recommend performing the following checks on the dehydrating breather: Check the LEDs indication. Check the display indication. Check the failure contact.
5.3 Fault monitoring
P r o b l em
Cause
Solution
Supply not running properly
Check connection.
Supply being protected
Try removing and returning voltage.
The fault alarm is active
Feelers faulty or wrongly connected
Check and/or invert connections between the faulty feeler and on operational one.
The temperature shown by the instrument is wrong for one or more feelers.
Faulty feelers
Check the feeler Ohm value with connections detached
The feelers are correctly connected, but LED “Fault” lights up.
Fault is intermittent
See: resetting the re-entered fault signal (page 11)
The instrument is sensitive to disturbance
The feelers are not screened or screen is not connected
Fit feelers to the screen and connect to ground, but on the instrument side only.
The instrument doesn’t switch on
If the problem is not mentioned above, please contact: Comem S.R. 11 Signolo, 22 36054 Montebello Vicentino (VI) - Italy Tel +039 0444 449311
E-mail:
[email protected] 15
5.4 Movement, transport and storage
All MB 101 Temperature Control Units are shipped inside a cardboard box positioned on a pallet to facilitate transport and storage. Upon receiving the Temperature Control Unit MB 101, the Customer must carry out the following operations: - examine the outer surface of the packaging to check that it is intact; - check that there are no breakages. If damages are found, please contact Comem, supplying the data provided in the shipping list and the serial number. Comem S.R. 11 Signolo, 22 36054 Montebello Vicentino (VI) – Italy Tel +039 0444 449311
E-mail:
[email protected]
The MB 101 Temperature control Unit must be stored in a dry place with temperature in the range of -20 to 40°C.
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Strada Regionale 11, Signolo 22 36054 Montebello Vic.No (VI) - Italy Tel. +39 0444 449311 - Fax -39 0444 449352 – 440359
http://www.comem.com e-mail:
[email protected]
