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Digital thermometer
MTeC® - EPT202www.messko.de
Messko
MTeC A4 zusgestellt Englisch 10.02.2005 13:35 Uhr Seite 1
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An examination of the ageing behaviour of the insulation system
of transformers andtherefore the service life in particular shows
that these are largely dependent on thetemperature in the winding.
This temperature is primarily determined by the load ofthe
transformer, the parameterization of the cooling control and the
overall design ofthe cooling equipment.
The activation and deactivation of the radiator, controlled by
the temperature of theoil or winding, are particularly important in
this respect.
A temperature monitoring system and fan control customized to
the individual con-ditions posed by the respective transformer
equipment firstly increases the expectedservice life of the
transformer and secondly reduces the total losses through
fanrunning times optimized for the load and temperature. The
radiators are controlledindividually according to the type of
cooling.
The new MTeC®-EPT202 equipment generation (digital thermometer
with load-dependent fan control) combines a number of functions for
monitoring the tempera-ture of transformers.
The basic device displays and monitors the temperature of the
oil and winding.
The maximum and minimum values for the temperatures and load
current are recordedand can be called up later. Two analogue
outputs and a RS485 interface are availablefor remote indication of
the temperature values.
MTeC®-EPT202 – the all-rounderMTO–ST160 und MTO–STF 160
The main functions such as Power, Alarm,Trip, Error and the
operating status of theindividual fan groups are quickly
identifiableby means of the LEDs in the control panel.
The clear central display shows all of theequipment information
for operating andprogramming the MTeC®, according to themenu
item.
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Navigation through the individual menu ischild's play thanks to
the cursor keys on theright-hand side next to the central
display.You can intuitively navigate your waythrough the individual
function areas.
We use safety screw terminals for com-munication and connecting
the supply lines,control wires and sensor lines. In addition,these
terminals simplify the assembly of thedevice in its place of
installation.
You can configure the individual mainswitching contacts so that
they are assignedto either the oil temperature or
windingtemperature. It is also possible to switcheach fan group
manually.
The input can be freely parameteriseddepending on which sensor
you use tomeasure the oil temperature (4 mA ... 20 mA or
Pt100).
MTeC A4 zusgestellt Englisch 10.02.2005 13:35 Uhr Seite 3
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The main switching contacts can be checkedextremely easily as
part of the regularchecks, using the Test function. All equip-ment
functions continue to run in thebackground.
In the "peak-value" menu item, you will findhandy variants of
"mechanical drag hands".Minimum/maximum values for the oil
andwinding temperatures and the maximumload current are recorded
and displayed.
You can configure the individual mainswitching contacts so that
they are assignedto either the oil temperature or
windingtemperature. It is also possible to switcheach fan group
manually.
The input can be freely parameteriseddepending on which sensor
you use tomeasure the oil temperature (4 mA ... 20 mA or
Pt100).
MTeC A4 zusgestellt Englisch 10.02.2005 13:35 Uhr Seite 4
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MTeC®-EPT202 – The functions at a glance
The new MTeC®-EPT202 equipment generation (digital thermometer
with load-dependent fan control) combines a number of functions for
monitoring thetemperature of transformers:+ Measurement/display of
the temperature of the oil and 1 to 3 windings+ Oil level display
for on-load tap-changer and transformer oil conservator+
Intelligent (cooling type- and load-dependent) fan control+
Calculation of residual service life in line with international
standards+ Storage of data+ Remote monitoring and parameterization
via a SCADA system or on site via PC+ Reduction of power loss (fan)
and noise emissions+ Targeted monitoring and reduction of thermal
load of transformer
MTeC®-EPT202 – Modular structure
Top oiltemperature
Oil temperature,winding
temperatureSCADA
Oil level
EPT 202 OL/CT
PT 1004…20 mA
Analog DigitalExtension-modules
CT phase1
CTphases2 and 3
Parameter Oil level
Analog
The lifetime of your transformer substantialdepends on the
thermal aging of thewinding. The MTeC® calculates the servicelife
already elapsed according tointernational standards.
CTOL
The outputs of the MTeC® can be set asrequired. If you wish to
connect anotherdevice at a later date, simply redefine
theparameters of the output.
MTeC A4 zusgestellt Englisch 10.02.2005 13:35 Uhr Seite 5
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MTeC® Technical Data of EPT202Protective housing
Rail mounting: Aluminium housing, snaps on to mounting rail in
line with DIN EN 60715 TH 35-7.5 and TH 35-15,degree of protection
IP 00 in line with IEC 60529, weight approx. 1.2 kg
19“ sub-rack: 19“ plug-in housing in line with DIN 41494 part 5,
223 x 133 x 178 mm (W x H x D) for mountingin 19” cabinet system,
degree of protection IP 00 in line with IEC 60529, weight approx.
1.5 kg
Flush panel mounting: Aluminium housing 270 x 200 x 133 mm (W x
H x D) for panel cut-out 236 mm x 142 mm (W x H),degree of
protection IP 00 in line with IEC 60529, weight approx. 1.5 kg
Installation in ED from MR: 19“ plug-in housing in line with DIN
41494 part 5, 483 x 133 x 178 mm (W x H x D), degree of protection
IP 00 in line with IEC 60529, weight approx. 2.5 kg
Temperature rangeOperation: -25° C…+70° CStorage: -30° C…+85°
C
Control elements, displaysControl elements: 5 x function keys
with tangible pressure pointDisplay: Monochrome display, White
characters on blue illuminated background, 128 x 64 dotStatus LEDs:
1 x green LED for “Power“ operating display
1 x yellow LED for “Alarm“ contact1 x red LED for “TRIP“
contact1 x red LED for “ERROR“ contact4 x yellow LEDs for “S1“,
“S2“, “S3“ and “S4“ contacts
InputsSupply voltage: 100 V AC…240 V AC, 50 Hz…400 Hz or 100 V
DC…353 V DC, power consumption: max. 10 VA or WTemperature sensor:
Pt100-Signal in line with IEC 751 in 2- or 3-conductor technology
or
4…20 mA signal (active or passive), standard measuring range:
-20°C…+140°C (others available on request)Instrument transformers
can be provided for other input signals such as 0…1 mA or 0…10
V.
Current transformer input: 0,5…5 A rated CT current, durability:
10 A for 8 hours, short-time current: 500 A for 1 secondOutputs
Analog outputs: 1 x oil temperature (Oil Temp.), temperature
range: -20° C…+140° C,1 x winding temperature (Winding),
temperature range: 0° C…160° CBoth analog outputs can be set as
required within the following ranges: 0…10 V
0…1 mA4…20 mA (errorsignal < 3,6 mA)4…20 mA (errorsignal >
22 mA)0…20 mA (errorsignal > 22 mA)
Interfaces: 1 x RS 232 on 9-pole D-Sub connector for
parametrization and data logging via PC1 x RS 485 on screw
terminals1 x SPI-Bus on 15-pole D-Sub connector for connecting
additional modules
Relais 4 x SPDT contacts for switching points S1–S4, make/break
capability of contacts, AC: 250 V/12A, DC: 110 V/0.4 A2 x SPDT
contacts for ALARM and TRIP, make/break capability of contacts, AC:
250 V/5A, DC: 110 V/0.4 A1 n/c contact for Error message,
make/break capability of contact, AC: 250 V/5A, DC: 110 V/0.4 A
TestsElektrical safety: Class 1 protection as per IEC 60536
Pollution degree 2 as defined in IEC report 664-1Overvoltage
category III as defined in IEC report 664-1
ECE conformity: EMC Directive 89/336 EECLow Voltage Directive
72/23 EEC
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MTeC®-EPT202 – the all-rounderMTO–ST160 und MTO–STF 160
Transformer
Sensor
Control room
Control cabinet
operations center
CTphase1
CTphase 2
CTphase 3
Oil leveltank
Oil levelOLTCILTC
MTO-STF160TT
MT-ST160SK-TT Pt100
Combi wellTT-PWM60
Analog outputoil temperature,
winding temperature
Analog outputoil levels
Signal contactsalarm, error,
trip
D1272 PQ 96 EI100 Signalling lamp D1272 EI100
Oil temperature
RS485
RS232
Cooling control
SCADAsystem
Analog inputAnalog input
Digitaloutput
150
50
0
100
¡C
+ +
(optional)
(optional)
MTeC A4 zusgestellt Englisch 10.02.2005 13:35 Uhr Seite 7
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Messko
www.messko.de
©Messko GmbH 2005Gablonzer Strasse 25–2761440 Oberursel,
Germany
Phone +49 (0)61 71 63 98-0 Fax +49 (0)61 71 63
[email protected]
Please note: Certain aspects of the equipment delivered may
differ from the information given in any of our publications.
Subject to changes.IN 2075/01en • 0105/2000 • 2075/01/2000 • Art.
no. 990912Printed in Germany • Messko/Usa
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