ba2078 ept202olct en rev0

Operating Instructions BA 2078/00/01www.messko.de MTeC® - Add-on module EPT20Add-on module EPT20Add-on module EPT20Add-on module EPT20Add-on module EPT202 OL/CT2 OL/CT2 OL/CT2 OL/CT2 OL/CT

Messko

2 BA 2078/00/01

Please keep for future reference

NOTENOTENOTENOTENOTE

The information in these operating instructions may differfrom the actually delivered device.

Subject to change without prior notice.

3BA 2078/00/01

MesskoTable of Contents

11111 GeneralGeneralGeneralGeneralGeneral ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 44444

1.1 Safety instructions ...................................................................................................................................................................... 4

1.2 Specified application ................................................................................................................................................................. 4

1.3 Imortant notes on equipment operation .............................................................................................................................. 4

1.4 Design ............................................................................................................................................................................................ 4

1.5 Capacity Features of the Expansion Stages ......................................................................................................................... 5

22222 Technical dataTechnical dataTechnical dataTechnical dataTechnical data ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 55555

33333 MountingMountingMountingMountingMounting ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 77777

3.1 Rail Mounting ............................................................................................................................................................................... 7

3.2 19" Rack and Panel mounting ................................................................................................................................................ 7

44444 Electrical connectionElectrical connectionElectrical connectionElectrical connectionElectrical connection ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 88888

4.1 Supply Voltage ............................................................................................................................................................................. 8

4.2 Sensor Input for Oil Level OL1 and OL2 ................................................................................................................................. 8

4.3 CT Input (Secondary Current Transformer) ........................................................................................................................... 8

4.4 Analog Outputs ............................................................................................................................................................................ 9

4.5 Switching Contacts ..................................................................................................................................................................... 9

55555 Function DescriptionFunction DescriptionFunction DescriptionFunction DescriptionFunction Description .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 1010101010

5.1 Basic Functions of the Add-on Modules ............................................................................................................................ 10

5.2 Extended Function CT .............................................................................................................................................................. 10

5.3 Extended Function OL .............................................................................................................................................................. 10

66666 Operation, indication and parameterizationOperation, indication and parameterizationOperation, indication and parameterizationOperation, indication and parameterizationOperation, indication and parameterization .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 1212121212

6.1 Parameterization of the Extended Function OL ................................................................................................................ 12

6.2 Parameterization of the Extended Function CT ................................................................................................................ 13

77777 Visualization SoftwareVisualization SoftwareVisualization SoftwareVisualization SoftwareVisualization Software ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 1414141414

7.1 Design of the Software ............................................................................................................................................................ 14

7.2 Software Expansion for CT Function .................................................................................................................................... 15

7.3 Software Expansion for OL Function ................................................................................................................................... 17

88888 AppendixAppendixAppendixAppendixAppendix ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 1818181818

8.1 Dimension Drawing EPT202OL/CT or EPT202CT for Rail Mounting ............................................................................ 18

8.2 Dimension Drawing EPT202OL/CT or EPT202CT as 19" Rack ........................................................................................ 19

8.3 Dimension Drawing EPT202OL/CT or EPT202CT for Panel Mounting ......................................................................... 20

8.4 Connection Diagram EPT202OL/CT or EPT202CT for Rail Mounting ........................................................................... 21

8.5 Connection Diagram EPT202OL/CT or EPT202CT for Mounting and 19" Rack ........................................................ 22

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1 General

11111 GeneralGeneralGeneralGeneralGeneral

1.11.11.11.11.1 Safety InstructionsSafety InstructionsSafety InstructionsSafety InstructionsSafety Instructions

All personnel involved in installation, commissioning,maintenance or repair of the equipment must:

- be suitably qualified and

- strictly observe these operating instructions.

Improper operation or misuse can lead to

- serious or fatal injury,

- damage to the equipment of the operator and

- a reduction in the efficiency of the equipment

Safety instructions in this manual are presented in threedifferent forms to emphasize important information.

1.21.21.21.21.2 Specified applicationSpecified applicationSpecified applicationSpecified applicationSpecified application

The functionality of the basic device EPT202 is extended withthe add-on modules EPT202CT or EPT202OL/CT from thedevice series MTeC®.

Before commissioning the device, it is essential to read andadhere to the limit values for the application specified on thename plate and operating instructions.

WARNINGWARNINGWARNINGWARNINGWARNING

This information indicates particular danger to life andhealth. Disregarding such warnings can lead to serious orfatal injury.

CAUTIONCAUTIONCAUTIONCAUTIONCAUTION

This information indicates particular danger to equipmentor other property of the operator, risk of serious or fatalinjury.


These notes provide important information on a certaintopic.

1.31.31.31.31.3 Important notes on equipment operationImportant notes on equipment operationImportant notes on equipment operationImportant notes on equipment operationImportant notes on equipment operation

User adherence to national accident prevention regulations ismandatory.

It is also pointed out that work on active (i.e. parts which arehazardous to touch) is only permitted when these parts are -potential free or are protected against direct touch.

National regulations pertaining to electrical installation mustbe observed. To ensure correct operation, it is essential toground the device in a proper manner.

1.41.41.41.41.4 MountingMountingMountingMountingMounting

The add-on module is available in the following 3 versions:

• Top-hat rail design, separate device for docking onto the basic device EPT202 and for assembly onto a top hat rail.

• As 19" design, integrated with the basic device EPT202 inone rack 84TE width.

• For control panel mounting integrated with the basic deviceEPT202 into one housing.


Make sure that all power supplies leading to the device aredisconnected at the switchgear cubicle before doingimpulse voltage testing or any other kind of applied voltagetesting to the transformer.

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Messko2 Technical Data

The calculation of life consumption and the activation ofswitching contacts (for corresponding parameterization) areperformed using the highest winding temperature. Themeasurement values are indicated as a scroll on the display.The highest winding temperature is indicated inverted on thedisplay and by the corresponding LED (WTI1, WTI2 or WTI3).

Add-on module EPT202OL/CT (additional OL expansion):Add-on module EPT202OL/CT (additional OL expansion):Add-on module EPT202OL/CT (additional OL expansion):Add-on module EPT202OL/CT (additional OL expansion):Add-on module EPT202OL/CT (additional OL expansion):

The 2 oil levels of the expansion tank (tank and OLTC) can becollected with the OL expansion.

The oil levels are shown on the display in the software and thedata logging function and can be output via 2 analogoutputs.

The output signal of the analog outputs for both oil levels OL1and OL2 can be parameterized as desired.

For each oil level there are 2 relay contacts available forreporting values above or below the limit value. The switchingpoints and the switching function (decreasing for valuesbelow the limit value and increasing for values above the limitvalue) are adjustable for each contact.

1.5 Capacity Features of the Expansion Stages1.5 Capacity Features of the Expansion Stages1.5 Capacity Features of the Expansion Stages1.5 Capacity Features of the Expansion Stages1.5 Capacity Features of the Expansion Stages

The additional modules can be equipped with 2 expansionstages.

Add-on module EPT202CT (CT expansion):Add-on module EPT202CT (CT expansion):Add-on module EPT202CT (CT expansion):Add-on module EPT202CT (CT expansion):Add-on module EPT202CT (CT expansion):

The CT expansion stage is used to indicate 2 additionalwinding temperatures on an LCD display, in the software andin the data logging function and are output via 2 analogoutputs. In addition, the currents of 2 additional CT currenttransformers must be fed into the device and the windingparameters set accordingly.

The minimum and maximum values of the additional windingtemperatures as well as the maximum value of the load currentare indicated and can be called later. These can be accessedand reset via the front panel of the device and over thesoftware.

The signals of the 2 additional analog outputs for windingtemperatures 2 and 3 can be parameterized as desired analogto the basic device.

In addition one switching contact each is available for ALARMII and TRIP II to create an alarm or trip signal for each oil andwinding temperature.

22222 Technical DataTechnical DataTechnical DataTechnical DataTechnical Data

Protective housingProtective housingProtective housingProtective housingProtective housing

Rail Mounting: Aluminum housing; can be snapped on for carrying rail in accordance with DIN EN 60715 TH 35-7.5and TH 35-15, protection rating: IP 00 in accordance with IEC 60529, weight: approx. 1.2 kg

19" Subrack: Together with basic device EPT202 in 19" rack in acc. to DIN 41494 part 5, 483 x 133 x 200 mm (W xH x D) for installation in 19" cabinet system, protection type IP 00 in acc. to EC 60529, weightapprox. 1.5 kg

Control panel mounting: Aluminum housing, 483 x 163 x 200 mm (W x H x D) for panel cutout 465 x 142mm (W x H),protection type IP 00 in accordance with IEC 60529, weight approx. 1.5 kg

Temperature rangeTemperature rangeTemperature rangeTemperature rangeTemperature range

Operation: -25°C ... +70°C

Storage: -30°C ... +85°C

Operator elements, indication, terminalsOperator elements, indication, terminalsOperator elements, indication, terminalsOperator elements, indication, terminalsOperator elements, indication, terminals

Status LED’s: 1 x LED, green, for „POWER“ operational indication

1 x LED, yellow for „ALARM“ switching contact

1 x LED, red for „TRIP“ switching contact

1 x LED, red for „ERROR“ switching contact

4 x LED, yellow for switching contacts „S1“, „S2“, „S3“ and „S4“

Terminals Safety screw terminals, for rigid braided leads : 0.2–2.5 mm², AWG 24 – 12, flexible braided leads(with core end sleeves): 0.2-2.5mm2, AWG 24 – 12

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2 Technical Data

InputsInputsInputsInputsInputs

Supply voltage: via the SPI interface of the basic device EPT202.

Current Transformer input: 2x 0.5 ... 5 A CT-nominal currentcontinuous loading capacity: 10 A for 8 hours short-time current: 500 A for 1 second

Input signal oil level: 4 ... 20 mA-signal (active or passive), measuring range: 0 ... 100 %

For other input signals such as 0 ... 1 mA or 0 ... 10 V, transducers can be offered.

OutputsOutputsOutputsOutputsOutputs

Analog outputs: 2 x winding temperature (WTI2 and WTI3), temperature range: 0°C ... 160°C (standard) 2x oil level (OL1 and OL2), output range: 0 ... 100 %

All analog outputs can be adjusted to requirement: 0 ... 10 V0 ... 1mA4 … 20 mA (error signal < 3.6 mA)4 … 20 mA (error signal > 22 mA)0 … 20 mA (error signal > 22 mA)

Relays: 2 x change-over contacts for ALARM II and TRIP II, contact capacity AC: 250 V / 5A, DC: 110V / 0.4 A4 x change-over contact for values above or below the limit value of the oil levels OL1 and OL2,contact capacity AC: 250 V / 5A, DC: 110V / 0.4 A

TestsTestsTestsTestsTests

Electrical safety: Protection class 1 in accordance with IEC 60536Protection rating IP 00 in accordance with IEC 60529Degree of soiling 2 in accordance with IEC report 664- 1Overvoltage category III in accordance with IEC report 664-1

Electromagneticcompatability: IEC 61000-4-2 Interference immunity against electrostatic discharge with 6 / 8 kV

IEC 61000-4-3 Interference immunity against HF fields with 10 V / m, 80 – 1000 MHzIEC 61000-4-4 Interference immunity against bursts with 2 kvIEC 61000-4-5 Interference immunity against surges with 2 kVIEC 61000-4-6 Interference immunity against HF on lines with 10 V, 150 kHz – 80IEC 61000-4-8 Interference immunity against magnetic fields with 30 A / m, 50 Hz, continuousIEC 61000-4-11 Interference immunity against voltage drops with the AC supply 30% / 0.5

periods 60% / 5 periods, with DC supply 100% / 10 ms and 60% / 100 ms

EN 61000-6-2 CE conformityEN 61000-6-4 CE conformity

Temperature undclimatic resistance: IEC 60068-2-1 Dry cold -25°C / 20 hours

IEC 60068-2-2 Dry heat +70°C / 16 hoursIEC 60068-2-3 Damp heat constant +40°C / 93% / 2 days, no condesnsationIEC 60068-2-30 Damp heat cyclic (12 + 12 Stunden) +55°C / 93% / 6 cycles

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Messko3 Mounting

33333 MountingMountingMountingMountingMounting

3.13.13.13.13.1 Rail mountingRail mountingRail mountingRail mountingRail mounting

The EPT202CT or EPT202OL/CT (refer to Fig. 1) is designed formounting on a rail in accordance with EN 60715 TH 35-7.5 orTH35-15. To install, the device must be placed on the rail withthe mounting clamp and pressed down until the device snapsonto the rail. Then slide the device against the basic deviceEPT202 until the lateral 15-pin D sub plug is completelyconnected to the basic device. To lock, screw the copperbracket (refer to Fig. 1/1) to the right earth connection of thebasic device.

3.2 19" Rack and Control panel mounting3.2 19" Rack and Control panel mounting3.2 19" Rack and Control panel mounting3.2 19" Rack and Control panel mounting3.2 19" Rack and Control panel mounting

The add-on module EPT202CT or EPT202OL/CT is integratedtogether with the basic device EPT202 in a standardized 19"rack or in a housing for panel mounting. Slide the rack intothe rack cabinet system or the panel cutout and fasten bymeans of the 4 holes on the front.

Fig. 2

Fig. 1 1


Connect or disconnect the basic device EPT202 and theadd-on module only if they are in a voltage-free state.


The device may only be mounted, electrically connectedand commissioned by qualified, trained personnel asspecified by these operating instructions.

The user must ensure that the device is operated accordingto its intended purpose.

Arbitrary and incorrect work which is performed withoutpreviously consulting Messko is forbidden for safetyreasons!

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4 Electrical connection

The add-on modules are to be connected in accordance withthe device-specific connection diagrams in the appendix (seepages 21 and 22). The individual connections are described inmore detail in the following sections.

Both add-on modules are equipped with the following:

EPT202 CT: 2x CT input 0.5...5A (chapter 4.3) 2 x analog output for winding temperatures II and III (chapter 4.4)2x relay contacts for ALARM II and TRIP II (chapter 4.5)

EPT202 OL/CT: 2x 4...20 mA- input for oil level (chapter 4.2)2x CT input 0.5...5A (chapter 4.3)2x analog output for oil levels (chapter 4.4)2x analog output for winding temperatures II and III (chapter 4.4)4x Relay contacts for oil level MIN / MAX (chapter 4.5)2x relay contacts for ALARM II and TRIP II (chapter 4.5)

4.14.14.14.14.1 Supply voltageSupply voltageSupply voltageSupply voltageSupply voltage

The add-on module is fed over the lateral D sub plug throughthe basic device EPT202. The green POWER LED displays theoperating state.

4.24.24.24.24.2 Sensor input for oil level OL1 and OL2Sensor input for oil level OL1 and OL2Sensor input for oil level OL1 and OL2Sensor input for oil level OL1 and OL2Sensor input for oil level OL1 and OL2

For the additional module EPT202 OL/CT the oil levels OL1 andOL2 (e.g. oil level tank and oil level LTC/OLTC) can be fed inwith a passive or active 4...20 mA sensor (the followingterminal allocations are examples, please refer to theconnection diagrams in the appendix for exact terminaldetails).


Input IInput IInput IInput IInput I11111 for passive 4... 20 mA sensor for passive 4... 20 mA sensor for passive 4... 20 mA sensor for passive 4... 20 mA sensor for passive 4... 20 mA sensor

Input I1 has an internal voltage supply for a sensor with 4 to20 mA-output and no own no own no own no own no own power supply . The connectedsensor is supplied with power through this input.

Sensor connection (+): Terminal 52Sensor connection (-): Terminal 53Shield: Terminal 51Supply voltage: 24 VDC ± 10%

Please take into account the maximumPlease take into account the maximumPlease take into account the maximumPlease take into account the maximumPlease take into account the maximumload of the sensor and the circuiting.load of the sensor and the circuiting.load of the sensor and the circuiting.load of the sensor and the circuiting.load of the sensor and the circuiting.

Input IInput IInput IInput IInput I2 2 2 2 2 for active 4... 20 mA sensorfor active 4... 20 mA sensorfor active 4... 20 mA sensorfor active 4... 20 mA sensorfor active 4... 20 mA sensor

An active (with its own power supply e.g. MTO-ST160/TT)4...20mA sensor can be connected to input I2.

Sensor connection (+): Terminal 52Sensor connection (-): Terminal 53Shield: Terminal 51

Please take into account the maximumPlease take into account the maximumPlease take into account the maximumPlease take into account the maximumPlease take into account the maximumload of the sensor and the circuiting.load of the sensor and the circuiting.load of the sensor and the circuiting.load of the sensor and the circuiting.load of the sensor and the circuiting.

4.34.34.34.34.3 CT input (secondary current transformer)CT input (secondary current transformer)CT input (secondary current transformer)CT input (secondary current transformer)CT input (secondary current transformer)

Connect the lines of the additional CTtransformer of the windings II and III to thecorresponding terminals.


Make sure that the electrical connection of the additionalmodules is carefully carried out.

Connect or disconnect the basic device EPT202 and theadd-on module only if they are in a potential-free state.

Switch the supply voltage on only after mounting andelectrical connection have been properly finished.


The EPT202 was developed in accordance with applicableEMC standards. To maintain the EMC characteristics, thefollowing points must be adhered to:

•Use the shielded lines for the data and signal connectionfrom the EPT202 to other devices. Ground the shield to theterminals provided for this purpose.

• Mount the add-on module directly to the main device


High voltage! High voltage! High voltage! High voltage! High voltage! The secondary current transformer must betotally isolated before connection is carried out.Open-circuit operation of secondary current transformer isnot permitted.

51 52 53 54

+ -I2

+ -I1

51 52 53 54

+ -I2

+ -I1

59 60

CT Wind.2

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75 76 77

OL1 MIN


4.44.44.44.44.4 Analog outputsAnalog outputsAnalog outputsAnalog outputsAnalog outputs

The output signals of the analog outputs for the oil levels OL1and OL2 and the winding temperatures WTI2 and WTI3 can beparameterized as desired to the following values:

0 to 10 V0 to 1 mA4 to 20 mA (error signal < 3.6 mA)4 to 20 mA (error signal > 22 mA)0 to 20 mA (error signal > 22 mA)

The error signal is output on the analog output when the inputsensor is defective.

With the current outputs, the maximum load (total resistanceof the lines and connected devices) 750W may not beexceeded. When a current output is not used, its terminals (+)and (-) must be jumpered. Otherwise an error message takesplace.

When the output signal is parameterized to 0 to10V, this mustbe loaded with at least 1 kW. An open or defective voltageoutput is not detected.

Analog outputs „Output OL1“ and „Output OL2“Analog outputs „Output OL1“ and „Output OL2“Analog outputs „Output OL1“ and „Output OL2“Analog outputs „Output OL1“ and „Output OL2“Analog outputs „Output OL1“ and „Output OL2“

Analog outputs „Output WTI2“ and „Output WTI3“Analog outputs „Output WTI2“ and „Output WTI3“Analog outputs „Output WTI2“ and „Output WTI3“Analog outputs „Output WTI2“ and „Output WTI3“Analog outputs „Output WTI2“ and „Output WTI3“

Line connection (+): Terminal 70 or 73

Line connection (-): Terminal 71 or 74

Shield: Terminal 69 or 72

The output range of the analog outputs mustcorrespond to the analog output „OutputWinding“ of the basic device EPT202 (refer to thenameplate of the basic device).

e.g. Output WTI of the basic device EPT202 0 to +160°C4 to 20 mA output:4 mA correspond to 0°C20 mA correspond to 160°C

A signal can be given by using theseswitching contacts when a parameterizedoil level is too high or too low.

Please connect the relay contactsaccording to requirement.

4.54.54.54.54.5 Switching contactsSwitching contactsSwitching contactsSwitching contactsSwitching contacts

Switching contacts oil levels MIN and MAXSwitching contacts oil levels MIN and MAXSwitching contacts oil levels MIN and MAXSwitching contacts oil levels MIN and MAXSwitching contacts oil levels MIN and MAX

Switching contacts ALARM II and TRIP IISwitching contacts ALARM II and TRIP IISwitching contacts ALARM II and TRIP IISwitching contacts ALARM II and TRIP IISwitching contacts ALARM II and TRIP II

An alarm or a tripping signal of thetransformer can be made using theseswitching contacts.

Please connect both relay contactsaccording to application.

87 88 89

ALARM II

69 70 71

+ -

OutputWTI 2

Line connection (+): Terminal 64 or 67Line connection (-): Terminal 65 or 68Shield: Terminal 63 or 66

The range of analog outputs correspondsto 0 to 100%, e.g. 4 to 20 mA output:

4 mA correspond to 0% 20 mA correspond to 100%

63 64 65

+ -

OutputOL 1


Please pay attention to their parameterization whenconnecting the switching contacts.

The switching contacts can be parameterized contrary tothe labeling, for example, as 2 MIN contacts.

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55555 Function descriptionFunction descriptionFunction descriptionFunction descriptionFunction description

5.1 Basic functions of the Add-On Modules5.1 Basic functions of the Add-On Modules5.1 Basic functions of the Add-On Modules5.1 Basic functions of the Add-On Modules5.1 Basic functions of the Add-On Modules

The functionality of the main device EPT202 is extended byconnecting the add-on module to it.

The extended functions CT and OL of both add-on modulesEPT202 CT and EPT 202 OL/CT are described as follows:

5.2 Extended function CT5.2 Extended function CT5.2 Extended function CT5.2 Extended function CT5.2 Extended function CT

A total of 3 winding temperatures (e.g. for each winding of 3phase transformers) can be mapped with this add-on module.The CT currents of the additional windings must be connectedto the add-on module for this.

All 3 winding temperatures as well as the 3 load currents aredisplayed and for remote electronic data transmission of thewinding temperatures there are 2 additional analog outputsavailable.

There is still an additional alarm and trip contact available asredundancy for the alarm and trip contact of the main device.

The calculation of life consumption and the activation of theswitching contacts is performed using the highest windingtemperature respectively.

Cooling step specific parameter setsCooling step specific parameter setsCooling step specific parameter setsCooling step specific parameter setsCooling step specific parameter sets

The add-on module extends the parameter sets by the nominalCT currents, the CT transformer conditions and the hotspotfactors of the additional windings.

Analog outputs „Output WTI2“ and „Output WTI3“Analog outputs „Output WTI2“ and „Output WTI3“Analog outputs „Output WTI2“ and „Output WTI3“Analog outputs „Output WTI2“ and „Output WTI3“Analog outputs „Output WTI2“ and „Output WTI3“

The add-on module is equipped with one analog output eachfor transmission of the winding temperatures WTI2 and WTI3.The output signal can be parameterized. The following outputsignals can be set as standard:

• 0 to 20 mA (error signal > 22 mA)


• 4 to 20 mA (error signal < 3.6 mA)

• 0 to 1 mA

• 0 to 10 V

Additional output signals can be implemented with a signalconverter.

The error signal is output when a defective sensor or an openanalog output is detected.

Switching Contacts ALARM II and TRIP IISwitching Contacts ALARM II and TRIP IISwitching Contacts ALARM II and TRIP IISwitching Contacts ALARM II and TRIP IISwitching Contacts ALARM II and TRIP II

The EPT202 is equipped with 2 additional switching contactsto create an alarm message and to trip the transformer. Thesecontacts can be allocated to the oil or the windingtemperature via the parameterization. The hysteresis and thedelay time can be adjusted.

Device Self-MonitoringDevice Self-MonitoringDevice Self-MonitoringDevice Self-MonitoringDevice Self-Monitoring

The add-on module supports the self-monitoring function ofthe main device EPT202. In addition to error recognition of themain device, the following functions are constantly monitoredand detected as errors:

• Analog output WTI2 open

• Analog output WTI3 open

When one of these errors has been detected, the ERRORcontact is closed, the ERROR LED lights up and the error isindicated on the display and in the visualization software.

Data loggingData loggingData loggingData loggingData logging

The data sets of the main device’s data logging function areextended by CT with the following data:

• Winding temperatures II and III

• Load currents winding II and III

• Error recognition analog output WTI2 and WTI3

• Status of ALARM II and TRIP II

5.3 Extended function OL5.3 Extended function OL5.3 Extended function OL5.3 Extended function OL5.3 Extended function OL

The oil levels (e.g. oil level tank and oil level LTC/OLTC) of atransformer can be recorded, transferred and oil levels that aretoo high or too low can be reported with the extendedfunction OL

When only 1 oil level is necessary, the 2nd oil level can bemasked out.

Sensor inputs for oil level OL1 and OL2Sensor inputs for oil level OL1 and OL2Sensor inputs for oil level OL1 and OL2Sensor inputs for oil level OL1 and OL2Sensor inputs for oil level OL1 and OL2

A sensor with an active or passive 4 to 20 mA output signalcan be excluded as an input sensor for both oil levels (e.g. oillevel tank and oil level LTC/OLTC).

The measuring range of the oil level sensor input is 0 to 100%.If the input signal is too high or too low, the defective sensoris detected.

5 Function description

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Analog outputs „Output OL1“ and „Output OL2“Analog outputs „Output OL1“ and „Output OL2“Analog outputs „Output OL1“ and „Output OL2“Analog outputs „Output OL1“ and „Output OL2“Analog outputs „Output OL1“ and „Output OL2“

The add-on module is equipped with 2 analog outputs fortransmitting both oil levels OL1 and OL2. The output signal canbe parameterized. The following output signals can be set asstandard:



• 4 to 20 mA (error signal < 3.6 mA)

• 0 to 1 mA

• 0 to 10 V

Additional output signals can be implemented with a signalconverter.

The error signal is output when a sensor is defective or anopen analog output is detected.

Switching contacts oil levels MIN and MAXSwitching contacts oil levels MIN and MAXSwitching contacts oil levels MIN and MAXSwitching contacts oil levels MIN and MAXSwitching contacts oil levels MIN and MAX

The additional device has 4 relay contacts for notification ifthe oil level exceeds or falls below a certain value. The switchfunction (inceasing or dereasing) and the respective switchingpoint of the contacts can be parameterized as desired.

Device Self-MonitoringDevice Self-MonitoringDevice Self-MonitoringDevice Self-MonitoringDevice Self-Monitoring

The add-on module supports the self-monitoring function ofthe main device EPT202. In addition to error recognition of themain device, the following functions are constantly monitoredand detected as errors:

• Sensor oil level OL1 is defective

• Analog output OL1 is open

• Sensor oil level OL2 is defective

• Analog output OL2 is open

When one of these errors has been detected, the ERRORcontact is closed, the ERROR LED lights up and the error isdisplayed on the LED and in the visualization software.

Data loggingData loggingData loggingData loggingData logging

The data sets of the main device’s data logging function areextended by OL with the following data:

• Oil level transformer (OL1) and oil level OLTC/LTC (OL2)

• Status of the relay contacts OL1 MIN, OL1 MAX, OL2 MINand OL2 MAX

• Error detection

5 Function description

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6 Operation, Indication and Parameterization

66666 OperOperOperOperOperation, Indication and Pation, Indication and Pation, Indication and Pation, Indication and Pation, Indication and Parararararameterizationameterizationameterizationameterizationameterization

A description now follows of the additional menus andparameters which appear on the display of the main deviceand which can be parameterized via the operator buttons ofthe main device EPT202.

Parameterization of the EPT202 via the visualization softwareis described in chapter 7.

Correct functioning of the additional module and the maindevice EPT202 is not ensured unless the device is completelyparameterized.

The following is a description of the parameterization ofextended functions OL and CT. Please refer to the operatinginstructions BA2076 on how to operate the basic deviceEPT202. The complete menu structure can be found in thequick reference guide.

6.16.16.16.16.1 Parameterization of the Extended Function OLParameterization of the Extended Function OLParameterization of the Extended Function OLParameterization of the Extended Function OLParameterization of the Extended Function OL

In the main menu <OIL LEVEL> both oillevels <Oil level 1> and <Oil level 2> areparameterized.

By selecting an oil level thecorresponding submenu is reached.

Submenu <OIL LEVEL 1>Submenu <OIL LEVEL 1>Submenu <OIL LEVEL 1>Submenu <OIL LEVEL 1>Submenu <OIL LEVEL 1>

The corresponding parameterizations canbe selected in this submenu.

Masking out the oil levelMasking out the oil levelMasking out the oil levelMasking out the oil levelMasking out the oil level

The diagram of the corresponding oil levelcan be masked out in this menu. This oillevel is not displayed, it does not appearin the data logging and the relay contactsare deactivated.

The oil level OL2 is masked out, if for example, a joint tankincorporating both transformer and OLTC is used.

Configuration of the switching pointsConfiguration of the switching pointsConfiguration of the switching pointsConfiguration of the switching pointsConfiguration of the switching points

The relay contacts of an oil level arestandard set as follows:

OL1 Max: A value exceeding the set<increasing> switch point is detected

and displayed. The relayswitches if the oil level increases, the hysteresistakes effect if the oil level falls.

Oil-Level

< -OIL-LEVEL- > Oil-Level-1_ Oil-Level-2_

Oil Level I

-OIL-LEVEL-1-_ OL1-Config.

OL1-Max.-Config. Contact OL1-Max. OL1-Min.-Config. Contact OL1-Min.

OL1-Output

OL1-Config

OL1-Config.

Oil-Level On__ Oil-Level Off_

Save ? YES NO

OL1-Max.-Config

OL1OL1-Maxax.-ConConfifig. g.

incincreasing decdecreasing

Sa Save ? ? YESYES NO NO

OL1 MIN: A value short of the set switch point is<decreasing> detected and displayed. The relay

switches if the oil level falls, the hysteresis takes effect if the oil level rises.

The switch function of the individual switching points can bereversed in the menus <OL1 Max. config.>, <OL1 –Min.Config.>, etc.

If both switching points report a value short of a minimumvalue then both relay contacts of the oil level must beparameterized to <decreasing>.

Switching point settingSwitching point settingSwitching point settingSwitching point settingSwitching point setting

The respective switching point of a relaycontact is parameterized in percentages.

Depending on the switch function therelay closes if the switching point isexceeded or is too low.

Contact OL1-Max.

ConContactct O OL1-L1-MaMax. x.

9090 % %

Sa Saveve ? ? YESYES NO NO

OL1-Output

OL1OL1-O-Outpuput 0-10-10 V0 V________ 0-10-1 m mA______

4- 4-2020 m mA (>2(>22) 2) 4 4-20 mAmA (< (<3,6) 6) 0- 0-2020 m mA (>2(>22) 2)

Sa Saveve ? ? YESYES NO NO

Analog outputAnalog outputAnalog outputAnalog outputAnalog output

The output signal for the oil level„Output OL1“ and Output OL2" can beparameterized as desired (see Chapter5.2).


The percentage display of the oil level and the percentagesetting of the switching point refer to the sensor inputsignal.

The sensor input signal can differ from the percentagefilling height or the percentage filling amount due to theconstruction of the tank or the functionality of the trans-ducer.

Please take this into consideration during the parameter-ization of the switching point.

13BA 2078/00/01

Messko6 Operation, Indication and Parameterization

Wind-Temp Output

-WIND.TEMP.OUTP- Wind.Temp-1 Outp Wind.Temp-2 Outp Wind.Temp-3 Outp

6.36.36.36.36.3 Parameterization of the extended function CTParameterization of the extended function CTParameterization of the extended function CTParameterization of the extended function CTParameterization of the extended function CT

In addition to the parameterization of the basic device EPT202the parameters must be set on both additional modules for thewinding II and III as well as the relay contacts ALARM II andTRIP II.

Please take the descriptions in BA2076 for the basic deviceEPT202 into consideration. The information contained hereonly describes deviations to the parameterization of the basicdevice.

Analog output winding temperature II and IIIAnalog output winding temperature II and IIIAnalog output winding temperature II and IIIAnalog output winding temperature II and IIIAnalog output winding temperature II and III

Parameterize the desired output signalfor the 2 additional analog outputs inmenu <I/O CONFIG>,

<Wind.Temp.Output> under<Wind.Temp-2 Outp> and<Wind.Temp-3 Outp>

Winding specific parametersWinding specific parametersWinding specific parametersWinding specific parametersWinding specific parameters

The following parameters are to be set for the add-on moduleEPT202 CT:

• The current transformer status (CT-Ratio) of the windings II and III in themenu <WINDING>, <CT-Ratio>.

• The hotspot factors of the windings IIand III in the menu <WINDING>,<Hotspot-Factor (H)> .

• The cooling level related CT-nominal-currents of the windings II and III inthe submenu for the cooling levelsCooling 0 ... Cooling 4

Wind-Temp-Outp1

Wind.Temp-1 Outp 0-10 V______ 0-1 mA____

4-20 mA (>22) 4-20 mA (<3,6) 0-20 mA (>22)

Save ? YES NO

CT-Ratio

-CT-RATIO- CT-Ratio-Wind.1_ CT-Ratio-Wind.2_ CT-Ratio-Wind.3_

Hotspot Factor

-Hotspot-Factor- Hotspot-F.-Wind.1 Hotspot-F.-Wind.2 Hotspot-F.-Wind.3

Rated Current

-RATED-CURRENT-0 Winding-1_ Winding-2_ Winding-3_

Rated Current 0, W1

RATED-CURRENT 0 Winding-1

2,00 A_

Save ? YES NO

Switching contacts ALARM II and TRIP IISwitching contacts ALARM II and TRIP IISwitching contacts ALARM II and TRIP IISwitching contacts ALARM II and TRIP IISwitching contacts ALARM II and TRIP II

A back up system to the contacts of thebasic device can be achieved by using theswitching contacts ALARM II and TRIP II.

The 2 additional switching contacts ALARMII and TRIP II are set analog to the contactsALARM and TRIP of the basic device.

The following parameters must be set:

<Configuration> Activation via the oil or the windingtemperature

<Switch-Point> Setting the switching point

<Hysteresis> Setting the hysteresis

<Delay-Time> Setting the delay time

Conatct Alarm

-CO-CONTNTACACT-ALAALARMRM-_ -_ ALAALARMRM-I-I_ ALAALARMRM-I-II

Contact Alarm I

-CO-CONTNT. AL. ALARMARM-I-I-_ -_ Co Confnfiguratiation on SwiSwitctch-h-PoPoint int HysHystetereresisis DelDelayay-T-Timime

14 BA 2078/00/01

7 Visualization software7 Visualization software7 Visualization software7 Visualization software7 Visualization software

7.1 Design of the software7.1 Design of the software7.1 Design of the software7.1 Design of the software7.1 Design of the software

If the basic device EPT202 is connected with an add-on module EPT202OL/CT or EPT202CT and the visualization software isstarted, then the additional functions of the software are displayed and are described in more detail as follows:

• In case of OL extension the menu item oil level is displayed. The analog outputs and the switching contacts can beparameterized in this menu.

• The measuring values for winding temperature WTI2 and WTI3, as well as the load current 2 and 3 and the relay contacts ALARMII and TRIP II appear in the monitor window during the CT expansion. During the OL extension the additional oil levels and thecorresponding relay contacts are visible.

• The saving of the top values is also expanded by the corresponding values (e.g. winding temp. 2 max.)

7 Visualization software

menu points

menu display

tabs monitor

15BA 2078/00/01

Messko7 Visualization software

7.2 Software extension for CT function7.2 Software extension for CT function7.2 Software extension for CT function7.2 Software extension for CT function7.2 Software extension for CT function

• In the menu points <User>, tabs <input/output configuration> the output signals can be parameterized for the analog outputsWTI2 and WTI3.

Analog outputs WTI2 and WTI3

• In the menu item <switching points> the switching contacts ALARM II and TRIP II (switching points, hysteresis and delay time)can be parameterized.

Switching contacts ALARM II and TRIP II

16 BA 2078/00/01

7 Visualization software

• In the menu item <winding> the parameters are set for the 2 additional windings: CT nominal current CT2 and CT3, Hotspotfactor H for the 2nd and 3rd winding, the transformation ratio for the current transformers CT2 and CT3.The updated CT current and the updated load factor for the 2nd and 3rd winding are shown in the display panels.

• If the easy set function is used to parameterize the winding parameter, the individual parameters (CT nominal currents, hotspotfactors, transformation ratios) are set to one value for all 3 windings.

Nominal currents CT2 and CT3

• Additional data, such as winding temperature WTI2 and load current 2 are also recorded through the data loggingfunction and can be analyzed using an Excel table.

Hotspot factor, CT- transformation ratioWinding 2 and 3

17BA 2078/00/01

Messko7 Visualization software

7.3 Software extension for OL function7.3 Software extension for OL function7.3 Software extension for OL function7.3 Software extension for OL function7.3 Software extension for OL function

• In the menu item <oil level> the parameterization for the switching contacts and the analog output of the oil levels OL1 and OL2can be carried out.

1

• The oil levels can be displayed or masked out individually by use of a check mark (1).

• The switch function can be set to <increasing> or <decreasing> (2). When the increasing switch function is selected, thecontact is switched over, if the level becomes too high. When the decreasing switch function is chosen, the contact is switchedover, if the level becomes lower than the set switching value(3).

• The output signal can be parameterized analog to the outputs for the winding temperature (4).

2

3

4

18 BA 2078/00/01

8 Appendix

88888 AppendixAppendixAppendixAppendixAppendix

8.1 Dimension drawing EPT202OL/CT or EPT202CT for rail mounting8.1 Dimension drawing EPT202OL/CT or EPT202CT for rail mounting8.1 Dimension drawing EPT202OL/CT or EPT202CT for rail mounting8.1 Dimension drawing EPT202OL/CT or EPT202CT for rail mounting8.1 Dimension drawing EPT202OL/CT or EPT202CT for rail mounting

Fig. 3

383

[15,09

5]84

[3,311]

120 [4,724]

243 [9,55

7]

86 [3,369]

19BA 2078/00/01

Messko8 Appendix

Fig. 4

8.2 Dimension Drawing EPT202OL/CT or EPT202CT as 19" rack8.2 Dimension Drawing EPT202OL/CT or EPT202CT as 19" rack8.2 Dimension Drawing EPT202OL/CT or EPT202CT as 19" rack8.2 Dimension Drawing EPT202OL/CT or EPT202CT as 19" rack8.2 Dimension Drawing EPT202OL/CT or EPT202CT as 19" rack

132 [5,2]

58 [2,28]

48

2,4

[18,9

9]

46

5,4

[18,3

2]

196,9 [7,75]7,3 [0,29]

446

[17,5

6]

n7x1

0 (0

.28"x0.3

9")

20 BA 2078/00/01

8.3 Dimension drawing EPT202OL/CT or EPT202CT for panel mounting8.3 Dimension drawing EPT202OL/CT or EPT202CT for panel mounting8.3 Dimension drawing EPT202OL/CT or EPT202CT for panel mounting8.3 Dimension drawing EPT202OL/CT or EPT202CT for panel mounting8.3 Dimension drawing EPT202OL/CT or EPT202CT for panel mounting

8 Appendix

Fig. 5

465,4 [18,32

]

482,4 [18,99

]

58 [2,28]

177 [6,98]

137,5 [5,41]

446,1 [17,56

]

197 [7,76]

7,3 [0,29]

n7x10 (0

.28"x0.39")

450 [17,72]

142 [5,59]

465,4 [18

,32]

58 [2,28]

21BA 2078/00/01

Messko

Fig. 6

8.4 Connection diagram EPT202OL/CT or EPT202CT for rail mounting8.4 Connection diagram EPT202OL/CT or EPT202CT for rail mounting8.4 Connection diagram EPT202OL/CT or EPT202CT for rail mounting8.4 Connection diagram EPT202OL/CT or EPT202CT for rail mounting8.4 Connection diagram EPT202OL/CT or EPT202CT for rail mounting

8 Appendix

Rel

ay c

onta

cts

51 Ana

log

inpu

t OL1

4 - 2

0mA

GN

D

OL1

MA

XO

L1 M

IN

7577

7678

7980

Ana

log

inpu

t OL2

4 - 2

0mA

-

+I1

+ -I2

5253

GN

D+

I1

5554

56

Inpu

t WTI

2C

T 0.

5 - 5

A

I 2-+

-

5758

5960

Rel

ay c

onta

cts TR

IP II

Ana

log

outp

utW

TI2

ALA

RM

IIO

L2 M

AX

OL2

MIN

8682

8183

8485

8789

8890

Ana

log

outp

utO

L1In

put W

TI3

CT

0.5

- 5A

6162

GN

D+

6364

Ana

log

outp

utO

L267

GN

D-

+

6566

-G

ND

6869

9192

Ana

log

outp

utW

TI3

+-

GN

D

7072

71

+-

7374

***** not included for add-on module EPT202CT not included for add-on module EPT202CT not included for add-on module EPT202CT not included for add-on module EPT202CT not included for add-on module EPT202CT

**********

*****

*****

*****

*****

*****

*****

22 BA 2078/00/01

8 Appendix

Fig. 7

8.5 Terminal connection diagram EPT202OL/CT or EPT202CT for panel mounting and 19" rack8.5 Terminal connection diagram EPT202OL/CT or EPT202CT for panel mounting and 19" rack8.5 Terminal connection diagram EPT202OL/CT or EPT202CT for panel mounting and 19" rack8.5 Terminal connection diagram EPT202OL/CT or EPT202CT for panel mounting and 19" rack8.5 Terminal connection diagram EPT202OL/CT or EPT202CT for panel mounting and 19" rack

82

OL2

MA

X

GN

D

Ana

log

outp

utO

L1

51

Ana

log

outp

utW

TI3

7576

7780

7978

81

Rel

ay c

onta

cts

Ana

log

outp

utW

TI2

TRIP

II

GN

D

5253

GN

D

5554

56

Ana

log

outp

utO

L2

ALA

RM

II

GN

D

5758

6059

61

GN

D

Ana

log

inpu

t OL2

4 - 2

0mA

9287

8384

8586

8889

9190

Rel

ay c

onta

cts

OL1

MA

X

Inpu

t WTI

2C

T 0.

5 - 5

AIn

put W

TI3

CT

0.5

- 5A

OL2

MIN

6263

6465

OL1

MIN

6766

I1

I2

6869

Ana

log

inpu

t OL1

4 - 2

0mA

I1

72

I27170

GN

D

7374

**********

*****

*****

*****

*****

*****

*****

***** not included for add-on module EPT202CT not included for add-on module EPT202CT not included for add-on module EPT202CT not included for add-on module EPT202CT not included for add-on module EPT202CT

23BA 2078/00/01

Messko

© Messko GmbH Phone: +49 (0)6171 / 6398 - 0 Gablonzer Straße 25-27 Fax: +49 (0)6171 / 6398 - 98 61440 Oberursel E-Mail: [email protected] Germany

Please note: The information contained in our documentations may differ in detailwith the actual device delivered.

We reserve the right to revise the documentation without prior notice.

BA2078/00/01 • Art.-Nr. 990979 • Printed in Germany • Layout Messko/HIN

Messko

ba2078 ept202olct en rev0

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