a-eberle REG-DA Operating Manual
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a-eberle REG-DA Operating Manual

Transformer monitor
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Operating Manual
Transformer-Monitor
TM
Feature TM1 of REG-D
Feature T1 of REG-DA
Transformer-Monitoring-Module TMM for upgrade
g
ISSUE August 2016

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Summary of Contents for a-eberle REG-DA

  • Page 1 Operating Manual Transformer-Monitor Feature TM1 of REG-D Feature T1 of REG-DA Transformer-Monitoring-Module TMM for upgrade ISSUE August 2016...

  • Page 2: Table Of Contents

    We take care of it. Table of Contents User guidance ........................ 4 Target group ..........................4 Warnings ........................... 4 Tips ............................5 Other symbols ........................... 5 Applicable documentation ......................5 Storage ............................5 Scope of delivery ......................5 Safety instructions ......................6 Basic description of the Transformer Monitor ..............
  • Page 3 SETUP 3: Alarm ........................32 5.4.1 Oil temperature (TC) ......................33 5.4.2 Oil level (TC) ........................... 33 5.4.3 Oil level (transformer) ......................34 SETUP 4: Alarm ........................35 5.5.1 Oil temperature (Alarm) ......................35 5.5.2 Winding temperature (Alarm) ....................36 5.5.3 Winding temperature (Trip) ....................

  • Page 4: User Guidance

    We take care of it. User guidance This user manual contains a summary of the information needed for installation, commis- sioning and operation. Read the user manual entirely and do not use the product unless you have understood its content. Target group The User Manual is intended for skilled technician’s as well trained and certified operators.

  • Page 5: Tips

    Tips Tips on the appropriate use of the device and recommendations. Other symbols Instructions Structure of the instructions:  Instructions for an action.  Indication of an outcome, if necessary. Lists Structure of unnumbered lists: List level 1 – List level 2 Structure of numbered lists: 1) List level 1 2) List level 1...

  • Page 6: Safety Instructions

    REGSys Support on: +49 (0)911 628108-101 or via email at: regsys-support@a-eberle.de. A. Eberle GmbH & Co. KG does not accept any liability for damage or losses of any kind arising from printing errors or changes in this manual.

  • Page 7: Basic Description Of The Transformer Monitor

    These channels can be also added to the REG-D on side. It is not possible to upgrade REG-DA at a later date therefore if TM is required this must be specified at time of ordering. For safety and warranty purposes disassembly of REG-DA is not permitted.
  • Page 8 We take care of it. The following SCADA protocols are available: IEC 61850 IEC 60870-5-101 IEC 60870-5-103 IEC 60870-5-104 DNP 3.0 / DNP 3.0 over Ethernet MODBUS RTU / TCP SPABUS PROFIBUS Figure 1: Signal diagram Basic description of the Transformer Monitor Page 8 Page 8 LEREF "Verzeichnis Ueberschrift"...
  • Page 9 The thermal situation in the transformer can be displayed in a graphic (see Figure 2). Please note that it is a simplified view of a complex situation. The 'simplification' is based on the following assumptions: the oil temperature in the tank increases linearly from the bottom to the top the average temperature of the winding is linearly parallel to the oil temperature with a constant temperature differential gr increasing from bottom to top the hot-spot temperature (P) is higher than the temperature of the winding at the up-...
  • Page 10 We take care of it. The basic version has only one current input to determine the hot-spot temperature. Three currents can also be measured through an optional Aron circuit (hardware Characteristic M2). In most cases, this configuration will produce acceptable results because one can assume that the transformer has a more or less balanced load.
  • Page 11 Block diagram of the hot-spot calculation and the cooling stage control Figure 3: Block diagram : Load factor = I / IN Θ : Hot-spot temperature Θ : Oil temperature (measured) Θ : Expected hot-spot temperature : Hot-spot to top-oil gradient : Winding exponent ∆Θ...
  • Page 12 We take care of it. If remote temperature gauges are used, both the hot-spot temperature and the oil temper- ature can be provided as mA output. The oil or hot-spot temperature function enables up to six groups of fans, two oil pumps and a heater to be connected.

  • Page 13: Activation Of The Transformer Monitor On The Reg-D(A)

    Activation of the Transformer Monitor on the REG-D(A) The Transformer Monitor is a part of the REG-D(A) firmware and it is managed with the software feature TM. By activating and deactivating the feature TM the Transformer Moni- tor function is switched on and off. To activate the feature TM a key code is necessary.

  • Page 14: Monitor

    We take care of it. Monitor In the main menu (press <Menu>), select the Moni- tor function with the <F4> function key. Press F1 to se- lect the monitor indication. The Monitor's basic screen shows either the oil tem- perature or the winding temperature as decimal values and a bar graph. The current cool- ing stage is also displayed.

  • Page 15: Oil Temperatures (Tc/Transformer)

    4.2.1 Oil temperatures (TC/Transformer) The temperature can either be displayed as bars or numerically. With the help of the setup menu the maximum temperatures for the transformer and the tap-changer can be set. If the temperature in the tap-changer tank is required, a mA value has to be supplied to the voltage regulator via an analogue input.

  • Page 16: Service Life

    We take care of it. Service life The 'SERVICE LIFE' menu, which combines all of the service lives (transformer, fan, pumps), is accessed from the 'MONITOR' main menu by pressing <F2>. 4.3.1 Operating hours (1) 'Operating hours 1' displays the accumulated operating hours for the transformer (trans- former under voltage), the tap changer and the oil pump.

  • Page 17: Operating Hours (2)

    If the voltage transducer is installed close to the bus bar, the controller will still measure a voltage if the secondary voltage of transformer T1 is switched off because the bus - and thus the voltage transducer - is supplied through the second active transformer T2. Figure 8 displays the secondary control voltage, while the voltage for the operating hour count is tapped from the primary voltage transducer.

  • Page 18: Loss Of Life (Iec)

    We take care of it. 4.3.3 Loss of life (IEC) The loss of life information is derived from the equations specified in IEC 60354 or IEC 60076-7. The loss of life should not be confused with the operating hours described earlier. The 'Op- erating hour' log file only counts the time during which the transformer is under voltage, while the loss of life takes thermal ageing into account.
  • Page 19 The following equation can be derived in common logarithms from equation (1) with Θ 98°C. This relationship is shown in the below table: Θ in °C Relative service life consumption 0.125 0.25 16.0 32.0 64.0 128.0 Example: 10 hours at 104°C and 14 hours at 86°C consume (10 h x 2) + (14 h x 0.25) = 23.5 hours dur- ing an operation period of 24 hours.

  • Page 20: Statistics

    We take care of it. Statistics Please press the <ESC> but- ton (alternatively <MENU> and <F4>) to go to the Moni- Main screen. All the tap changer’s activi- ties are recorded in Statistics < F3 >. The total number of tap changes (65 in the example) and the total number of tap changes under load (26 in the example) are recorded in STATISTICS –1.

  • Page 21: Setup

    SETUP  Press < ESC > (alternatively <Menu> and <F4>) to return to the main monitor menu then press < F5 > to enter the setup. SETUP 1: Regulation  Use the <F2...F5> keys to access the individual sub- menus. 5.1.1 Transformer Parameters A parameter set can be specified for each cooling stage.
  • Page 22 We take care of it. You may need to contact the manufacturer. The time constant for the winding is the time that would elapse until the hot spot reaches the steady-state final value divided by five. Example: With a time constant of 3000 seconds, it is assumed that after 5 x 3000 s = 15,000 s, mean- ing about 4 hours, the steady-state final value of the hot-spot temperature will be reached.
  • Page 23 5.1.1.5 Overview of the IEC standard settings Medium and large power transformers Hot spot gradient Winding exponent IEC 60354 Winding exponent IEC 60076-7 Constant IEC 60076-7 Constant 2,0 1,45 IEC 60076-7 Constant IEC 60076-7 w Winding time constant [min] Table 1: IEC standard settings for monitoring parameters * The information „limited oil flow“...

  • Page 24: Regulation Base

    We take care of it. 5.1.2 Regulation base Different reference temperatures can be chosen for the control of the individual fans. Be- cause the temperature for the oil and the winding are related in terms of their formula, both temperatures can be used as base temperature. In order to accommodate their own business philosophy, users can select which rule they use.

  • Page 25: Programming/Setup Of The Control Inputs And Outputs

    Programming/Setup of the control inputs and outputs Both the REG-D and the REG-DA voltage regulators can receive various control signals as binary signals and also output control signals via relay outputs. The following Transformer Monitor specific input functions are available:...
  • Page 26 Example: To program the regulator as follows: The Oil pump should be controlled by relay output 8 on the REG-DA. Fan group 1 via the output relay 9 Fan group 2 via output relay 10 Fan group 3 via the output relay 11.

  • Page 27: Analog Channels

    The REG-DA can have up to eight analogue inputs and up to seven analogue outputs. How- ever, the number of channels required must be specified at the time of ordering, since changes to the equipment later are not possible in the field.
  • Page 28 If necessary, limit values can of course be derived from such 'non-standard inputs' and output by relay. To do this, please contact the A. Eberle head office by using +49(0)911/628108-101 or regsys-support@a-eberle.de. Setup of the analogue channels Additional Information regarding the analogue channels and the according setup can be found in the manual of the REG-D(A).

  • Page 29: Setup 2: Regulation

    SETUP 2: Regulation  SETUP 2 is accessed by pressing the '→' arrow or <F1> in ‘SETUP 1’. 5.3.1 Calculation  By pressing the <F2> button the menu Calculation set- tings are reached. Here you are able to set the type of cooling and the IEC algorithm that is used for determin- ing the Hot spot temperature.

  • Page 30: Fan Assignment

    We take care of it. Type of oil cooling (inner cooling medium) The following options are available: ON: Stands for ONAN or ONAF cooling OF: Stands for OFAF or OFWF cooling OD: Stands for ODAF or ODWF cooling ON/OF: Stands for switching between ON and OF cooling. In this case, at least one con- trollable oil pump is available: ON/OD: Stands for switching between ON and OD cooling.

  • Page 31: Number Of Fans

    5.3.3 Number of fans As the number of fan groups varies by transformer type, the current number can be en- tered in the menu. As a result, this setting will be adjusted in all menus in which fan control and fan service life parameters are configured. There are a total of six fan cooling groups that are identified in the menu by the numbers 1: to 6:.

  • Page 32: Setup 3: Alarm

    We take care of it. 5.3.4.3 Tap changer switching time The value I t is used to record the quality of the contact load in the tap changer. The cur- rent used to calculate I t is taken from the continuous measurement of the current, while the switching quantity 't' is a tap-changer specific value.

  • Page 33: Oil Temperature (Tc)

    5.4.1 Oil temperature (TC) 5.4.1.1 Maximum value Defines the switch-on point for the alarm signal. Setting range: 0...150°C 5.4.1.2 Switching delay Defines the switch-on delay for the alarm signal. Setting range: 0...900 s 5.4.1.3 Hysteresis Defines the hysteresis for the switching point. Setting range: 1...30 K 5.4.2 Oil level (TC)

  • Page 34: Oil Level (Transformer)

    We take care of it. Hysteresis Defines the hysteresis for both switching points. Setting range: 1 … 30% 5.4.3 Oil level (transformer) Minimum value Defines the switch-on point for the 'Oil level too low' alarm signal. Setting range: 0 … 150% Maximum value Defines the switch-on point for the 'Oil level too high' alarm signal.

  • Page 35: Setup 4: Alarm

    SETUP 4: Alarm  SETUP 4 is accessed by pressing the '→' arrow or <F1> in SETUP 3. Use <F2...F5> to access other submenus in which limits, switching delays and hysteresis can be selected. In setup 4 the limits for oil temperature alarm, winding tem- perature alarm and the winding temperature trip can be ad- justed.

  • Page 36: Winding Temperature (Alarm)

    We take care of it. 5.5.2 Winding temperature (Alarm) Limit value Defines the switch-on point for the alarm signal. Setting range: 0...200°C Switching delay Defines the switch-on delay for the alarm signal. Setting range: 0...900 s Hysteresis Defines the hysteresis for the switching point. Setting range: 1...30 K 5.5.3 Winding temperature (Trip)

  • Page 37: Setup 5: Alarm Water And Gas In Oil

    SETUP 5: Alarm Water and Gas in oil  SETUP 5 is accessed by pressing the '→' arrow or <F1> in SETUP 4. Use <F2...F5> to access other submenus in which limits, switching delays and hysteresis can be selected. In the setup 5 the parameters of the limits water in Oil, gas in oil, H2 in oil and CO in oil can be set.

  • Page 38: H2 (Hydrogen) In Oil Content

    We take care of it. Switching delay Defines the switch-on delay for the alarm signal. Setting range: 0...900 s Hysteresis Defines the hysteresis for the switching point. Setting range: 1...100000 ppm 5.6.3 H2 (Hydrogen) in Oil content Limit value Defines the switch-on point for the alarm signal. Setting range: 0...1000000 ppm Switching delay Defines the switch-on delay for the alarm signal.

  • Page 39: Setup 6: Lifetime

    Switching delay Defines the switch-on delay for the alarm signal. Setting range: 0...900 s Hysteresis Defines the hysteresis for the switching point. Setting range: 1...100000 ppm SETUP 6: Lifetime  SETUP 6 is accessed by pressing the '→' arrow or <F1>...

  • Page 40: Lifetime Tap Changer

    We take care of it. Operating time mom. (IEC) This is where the IEC-based operating hours (loss of life) are adjusted. Setting range: 0...999999 h 5.7.2 Lifetime Tap changer Switching load This is where the current switching load for the tap changer is adjusted. Setting range: 0...9000000 A Operating time maximal Press <F4>...

  • Page 41: Lifetime Fan

    Operating time mom. The 'Elapsed operating hours' parameter is important if the system is not installed at the same time as the transformer and the oil pump. Both parameters may need to be adjusted in conjunction with revisions. Setting range: 0...999999 h 5.7.4 Lifetime Fan The number of parameter/value sets is based on the...

  • Page 42: Retrofit Of Analogue Channels

    We take care of it. Retrofit of analogue channels (only REG-D and TMM) Check the wiring Please check first whether the housing/rack has the wiring for the analogue chan- nels. If this is not the case, a rewiring has to be done. It is recommended that this work be carried out at the A.
  • Page 43 For retrofitting of analogue modules it is necessary to remove the REG-D™ from the hous- ing. To do so, loosen the four retaining screws and pull the REG-D™ out with aid of the removal tool. Now place the REG-D™ in front of you on a work surface. To ensure correct channel assignment of the analogue channels, insert the REG-D™...
  • Page 44 Please note that the analogue channels can only be used directly as of firmware version 2.00. With older firmware versions, a background program is necessary. For questions regarding this matter, please contact the A. Eberle REGSys support team (regsys-support@a-eberle.de, +49(0)911/628108-101). Page 44 Page 44 LEREF "Verzeichnis Ueberschrift" \* MERGEFORMAT Index...

  • Page 45: Increasing The System's Hardware Resources

    Increasing the system's hardware resources To increase the number of channels, multiple interface cards can be connected on the COM 3 (RS485) peripheral interface. Interface cards are available for analogue inputs and outputs (ANA-D) as well as for binary inputs and outputs (BIN-D). It is also possible to communicate directly with other devices through the COM3/Modbus converter.
  • Page 46 We take care of it. The BIN-D interface card can be supplied with either eight relay outputs or sixteen optically decoupled binary inputs. Figure 10: Hardware extension via BIN-D ANA-D and BIN-D interface cards can be combined on COM3 as desired. Figure 11: Hardware extension via ANA-D and BIN-D Increasing the system's hardware resources Page 46...

  • Page 47: Com3/Modbus (Rtu Master) Converter

    COM3/Modbus (RTU Master) Converter The COM3/Modbus converter enables serial communication with any sensor or device that supports the Modbus RTU protocol (slave). This enables temperature, gas in oil and ambi- ent measurements to be directly recorded and processed. Conversion to a mA-Signal is no longer necessary.

  • Page 48: Temperature Measurement

    We take care of it. Temperature measurement As described earlier, there are two ways of measuring the oil temperature: The temperature signal is supplied by a temperature transducer as a 4...20 mA signal. The temperature signal is supplied by a PT-100 sensor in a three-wire circuit. Accuracy considerations From a measurement standpoint, the accuracy of the hot-spot temperature recording is es- sentially influenced by the oil temperature measurement.

  • Page 49: Warranty

    A test report of the “Measuring the hot-spot temperature” and “Determining the reduction in lifetime” basic functions is available at A. Eberle GmbH & Co.KG. If you are interested in this test report please contact the REGSys support team (regsys-support@a-eberle.de, +49(0)911/628108-101). Warranty...
  • Page 50 We take care of it. Notes Notes Page 50 Page 50 LEREF "Verzeichnis Ueberschrift" \* MERGEFORMAT Index Fehler! Verwenden Sie die Registerkarte 'Start', um Verzeichnis Ueberschrift...
  • Page 51 Notes Page 51...
  • Page 52 D-90461 Nuremberg Germany Tel.: +49 (0) 911 / 62 81 08-0 Fax: +49 (0) 911 / 62 81 08-96 E-Mail: info@a-eberle.de http://www.a-eberle.de Copyright by A. Eberle GmbH & Co. KG Subject to change without prior notice. Article no. 584.0791 – FW 2.23/3.23...

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