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2. OPERATION PRINCIPLES

GEK-106305A

DTR Digital Tap Changer Controller

7

2. OPERATION PRINCIPLES

2.1 CONTROL FUNCTIONS

The transformer tap changer controller controls manually or automatically the OLTC (transformer on load tap
changer), originating tap-up and tap-down commands, in order to keep the power supply voltage practically constant,
independently from the load.

2.1.1 REGULATION ALGORITHMS

In order to achieve this voltage regulation, the DTR uses two algorithms:

1. Comparing the measured voltage with the voltage setpoint.

2. Compensating the voltage dropouts generated by the load current by means of the calculation of the apparent

current. This calculation consists of subtracting from the measured voltage, a voltage proportional to the load
current, before the measured voltage is compared with the voltage setpoint.

The main characteristics of both algorithms are:

•

The variation of the measured voltage in relation to the voltage setpoint is provided with an Insensibility Degree
(ID). This ID is defined as the maximum admissible variation of the voltage before the DTR originates a
command to change the tap in the OLTC. This operation avoids the excessive wear of the OLTC contacts, with a
practically constant voltage at the same time.

•

If the difference between the measured voltage and the setpoint is greater than the Insensitivity Degree will be
corrected with a certain delay

Operating Time

(OT), so that:

•

If the difference lasts only for a short time (less than the Operation Time), the DTR system will not order

a tap change.

•

The voltage deviations will be regulated proportionally to the difference between the real value and the

setpoint value. The greater the deviation is, the sooner the DTR will operate.

The way of operation of both algorithms is the following:

1.

If

|DV| > ID

Absolute value of the difference between the setpoint and the real voltage is greater than Insensitivity Degree

Then

An operation on the OLTC must be performed.

Otherwise

No operation will be produced on the OLTC

2.

If

DV: Deviation between the real voltage and the setpoint is lower than zero

Then

There will be a tap-down operation

Otherwise

There will be a tap-up operation

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Содержание DTR GEK-106305A

Страница 1: ...512 E gemultilin ge com Internet www GEMultilin com Copyright 2005 GE Multilin DTR Digital Tap Changer Controller Instruction Manual GEK 106305A GE Multilin Avda Pinoa 10 48170 Zamudio SPAIN T 34 94 485 88 00 F 34 94 485 88 45 E gemultilin euro ge com g GE Consumer Industrial Multilin ...

Страница 2: ...29 2 3 1 EVENT REGISTER 29 2 4 CONTROL FUNCTIONS 29 2 4 1 ALARMS TREATMENT 29 2 4 2 SIGNALING 31 2 4 3 COMMANDS 31 2 4 4 TIME SYNCHRONIZATION 31 2 4 5 CONFIGURABLE INPUTS AND OUTPUTS 32 2 4 6 SETTING TABLES 34 2 5 USER INTERFACE AND COMMUNICATIONS 35 2 5 1 LOCAL USER INTERFACE 35 2 5 2 REMOTE COMMUNICATIONS SOFTWARE 38 3 SETTINGS 42 3 1 SETTINGS 42 3 2 COMMENTS ABOUT THE SETTINGS 45 3 2 1 GENERAL ...

Страница 3: ...TS 74 7 6 COMMUNICATIONS 75 7 7 DISPLAY KEYPAD AND LEDS 75 7 8 VERIFICATION OF OUTPUTS AND DTR OPERATION 76 7 8 1 VERIFICATION OF ALARM CONTACTS LOCAL AND REMOTE 76 7 8 2 VERIFICATION OF RTU OUTPUTS 77 7 8 3 VERIFICATION OF THE TAP UP TAP DOWN COMMANDS OPERATION 77 7 8 4 VERIFICATION OF UNDERVOLTAGE OVERVOLTAGE AND OVERCURRENT CONTACTS 78 7 9 DYNAMIC VERIFICATION OF THE REGULATOR OPERATION 78 7 9 ...

Страница 4: ...otection statuses Table III Settings common to all tables Table IV Independent settings for each table LIST OF FIGURES Fig 1 Wiring diagram for DTR units with taps coded in BCD Fig 2 Wiring diagram for DTR units with taps per contact Fig 3 Panel mounting diagram Fig 4 RS 232 connection Fig 5 Dimensions diagram Fig 6 Front view Fig 7 Rear view ...

Страница 5: ...TABLE OF CONTENTS 4 DTR Digital Tap Changer Controller GE 106305A ...

Страница 6: ...he power system DTR is used in MV substations for controlling the voltage operating on the OLTC of power transformers The functions integrated in these units are A CONTROL Transformer OLTC control Overvoltage unit for monitoring the OLTC control Undervoltage unit for monitoring the OLTC control Overcurrent unit for monitoring the OLTC control Blocking functions for excessive number of operations t...

Страница 7: ...hile the rear port is selectable between RS232 RS485 plastic or glass fiber optic The associated software for DTR units is as follows GE LOCAL communications software which allows the user to view and modify protection settings alarms internal status etc GE INTRO configuration software which allows to program inputs outputs alarms and LEDs These software packages are part of the GE NESIS network s...

Страница 8: ...y Degree ID This ID is defined as the maximum admissible variation of the voltage before the DTR originates a command to change the tap in the OLTC This operation avoids the excessive wear of the OLTC contacts with a practically constant voltage at the same time If the difference between the measured voltage and the setpoint is greater than the Insensitivity Degree will be corrected with a certain...

Страница 9: ...l voltage and the setpoint calculated in the following way depending on the selected algorithm Algorithm 1 Voltage regulation DV V0 Vm V0 setpoint Vm Measured voltage Algorithm 2 Compensating by means of the calculation of apparent current DV V0 Vcom Vm V0 setpoint Vm Measured voltage Vcom Kcom Im In Kcom Calculation of current Adjustable Im Measured current In Nominal current Only when Vcom Vcoma...

Страница 10: ... 2 1 2 OPERATING CURVE The standard operation times FT 1 for different values of Insensitivity Degree are shown in the following figure 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 0 5 1 2 3 4 5 GI Insensitivity Degree in DU Voltage Deviation in tb sg Base Tiem in seconds ...

Страница 11: ...cessful Lowering Raising tap command TimeOut DV 0 TimeOut TimeOut Stop command Automatic command Automatic command Manual command Stop commad Lowering Tap command Manual command GI DV 1 Interlock Sucessive Op 27 59 50 Reg Alarm Excessive OP Irregular Tap Change Reg Alarm Excessive Op Irregular Tap Changer TimeOut DV 0 Tap n Tap n 1 1 Tap n Tap n 1 1 Tap n Tap n 1 1 Timeout TimeOut Automatic Manual...

Страница 12: ...ap up Tap down status 5 Tap Up When the DTR system is in this state it checks whether the OLTC is in the maximum tap if so then the DTR system stops the operation Otherwise the DTR stays in this state during the time set for Operation Pulse before changing to Waiting for Tap up state 6 Tap Down When the DTR system is in this state it checks whether the OLTC is in the minimum tap if so then the DTR...

Страница 13: ...s function allows the user to limit the number of raising lowering tap operations in a specified time interval When the regulator is in Automatic Mode and there are continuous operations at a higher speed than the one specified by Number of Successive Operations and Time window settings the DTR will change to Manual mode Once this function is enabled it will disable itself after a certain time wit...

Страница 14: ...e on the secondary side of the transformer Frequency Hz Voltage Frequency Active Power MW Three phase active power on the primary side of the transformer Reactive Power MVar Three phase reactive power on the primary side of the transformer cos phi Power factor Setpoint V Voltage setpoint phase to phase Rated voltage V Rated voltage setting V difference V Difference between the real voltage and the...

Страница 15: ...unters which can be started and checked independently Number of RAISING OPERATIONS performed on the OLTC Number of LOWERING OPERATIONS performed on the OLTC Number of total OPERATIONS performed on the OLTC These counters can be accessed by means of the HMI display on the front of the relay or by the GE_LOCAL communications software ...

Страница 16: ...s to an AND gate may be internal flags or the output of other AND gate 1st group Program initiate Parallel EEPROM alarm Settings change Serial EEPROM alarm Write counters New events Default general settings Date Time lost Default table 1 settings Out of service Default table 2 settings Default table 3 settings 2nd group External trigger Active table 1 Active table 2 Active table 3 DV GI Communicat...

Страница 17: ... E15 E22 E16 E23 E17 E24 E18 E25 E19 E26 E20 E27 E21 E28 7th group E29 E36 E30 E37 E31 E38 E32 E39 E33 E40 E34 E41 E35 E42 8th group STOPPED TAP DOWN PULSE AUTOMATIC automat status TAP DOWN TIME MANUAL TAP DOWN SUCCESS TIMING TAP DOWN FAIL TAP UP PULSE TAP UP TIME REM TRIP pulse TAP UP SUCCESS HOLD TRIP REM TAP UP FAIL 9th group E LOCAL REG INTERBLOCK 1 E REMOTE REG INTERBLOCK 2 ...

Страница 18: ...output with an alarm meaning either as it is or inverted SETTINGS CHANGE When a settings change is performed this signal becomes active and it gets deactivated when the system generates the corresponding event WRITE COUNTERS When a change on any counter is done this signal becomes active and it gets deactivated when the system generates the corresponding event NEW EVENTS This signal becomes active...

Страница 19: ...EFAULT SETTINGS If the settings on Table 2 have never been changed the system has the factory default Table 2 settings This signal shows this situation TABLE 3 DEFAULT SETTINGS If the settings on Table 3 have never been changed the system has the factory default Table 3 settings This signal shows this situation EXTERNAL TRIGGER This signal turns ON and OFF as the External Trigger Digital Input is ...

Страница 20: ... is greater than the OVERVOLTAGE setting and therefore the regulation automatism in automatic mode will not operate UNDERVOLTAGE This signal becomes active when the measured voltage is lower than the UNDERVOLTAGE setting and therefore the regulation automatism in automatic mode will not operate OVERCURRENT This signal becomes active when the measured current is greater than the OVERCURRENT setting...

Страница 21: ...lation automatism REM TRIP PULSE This signal indicates the status associated to Remote Trip HOLD REM TRIP This intermediate signal is enabled to permit the activation of the REMOTE TRIP INPUT by pulse and not by level E LOCAL This signal becomes active when the DTR system receives in a digital input RTU a signal to change the DTR to local mode E REMOTE This signal becomes active when the DTR syste...

Страница 22: ... GE_INTRO software SUCCESSIVE OPERATIONS This signal becomes active when the regulation automatism in automatic mode is blocked because of an excessive number of operations in a determined interval of time REGULATOR ALARM This signal becomes active when the input that means alarm in the OLTC is active MAXIMUM TAP This signal becomes active when the OLTC is in its maximum available tap and therefor...

Страница 23: ...tions which guarantee the correct performance of the unit and will block the operation in case of internal errors These self monitoring checks are carried out both when the unit is started up and during normal operation The checks are carried out on the internal power supply program memory ROM working memory RAM oscillographic memory RAM and settings and calibration memory EEPROM ...

Страница 24: ... as they are generated tagged with date and time information Alarms will also be transferred through the communication link to the level 2 substation level Local Protection and control room and Level 3 dispatch center if they are available and this transfer is programmed There are four different status for a given alarm Active alarm and not acknowledged by the operator Active alarm and acknowledge...

Страница 25: ...ations can be carried out by means of local communications HMI or communication software by remote communications or by pulse inputs conventional RTU 2 4 4 TIME SYNCHRONIZATION The DTR system includes an input for time synchronization This input requires the connection of a device to supply a demodulated IRIG B output In this way co ordinated universal time is measured to a high degree of accuracy...

Страница 26: ...e meanings shown in the following table can be assigned to any input for further information about the configuration of the inputs please refer to the GE_INTRO instruction book Available logic signals to be assigned to Physical digital inputs are as follows Function Table 1 Table 2 External trigger Interblock 1 Interblock 2 Alarm_Regulator BCD_1 BCD_2 BCD_3 BCD_4 BCD_5 BCD_6 Tap up Tap down Automa...

Страница 27: ... these can be used to carry out logical operations NOT AND and OR gates providing the unit with great flexibility The output configuration is done using different levels At the first level it is possible to use AND gates of up to 16 signals The output is incorporated into the state matrix so that it can in turn be used in next AND gates of up to 16 inputs This process can continue until the 16 AND...

Страница 28: ...etting table can be changed by means of up to 2 digital inputs referred as TABLE SELECTION 0 and TABLE SELECTION 1 which allow up to 4 combinations from 0 to 3 To do this it is necessary to configure using GE_INTRO software two inputs to have these meanings For applications which require fewer tables up to 2 it is possible to use only one input The selected combination is obtained from the binary ...

Страница 29: ... this menu shows the most important information of the device by pressing only one key Control Local MMI The control HMI incorporates functional keyboard with 6 keys and graphic LCD display This graphic LCD shows four different screens that can be accessed sequentially BAY MIMIC This screen shows the mimic of the bay that is a diagram of the bay related to the DTR module showing the status of the ...

Страница 30: ... ALARMS SCREEN This screen shows the alarms generated in the system with the following format Alarm label Time when the alarm was generated with 1 ms resolution Date of the alarm MEASUREMENTS SCREEN This screen shows the real time measurements associated with the DTR system ...

Страница 31: ...al Tap Changer Controller GE 106305A DIGITAL INPUTS AND OUTPUTS STATUS SCREEN This screen shows the status of all the inputs and outputs A dark background means that the input or output is activated The following figure shows this screen ...

Страница 32: ...ndicated on the front of the unit by LED indicator 16 in default configuration Local communication refers to communication via the keyboard display local display showing any information except for the initial DTR GENERAL ELECTRIC or via communication gate 1 PORT 1 and remote communication refers to connection via gate 1 PORT 2 or gate 2 PORT 3 Local and remote communications can exit at the same t...

Страница 33: ...Display of Level 1 units status Display and change of settings Display of metering data Perform predefined operations Reading display and reset of counters Display of alarms Upload and display events Upload oscillography records Time synchronization INCREASE DECREASE STOP AUTOMATIC MANUAL REMOTE LOCAL Setpoint Vsec Oper 110 00 V 109 25 V 30 00 s TAP 19 ...

Страница 34: ...protection inputs and outputs Configuration of control inputs and outputs Configuration of alarms Definition of operations and interlocking conditions Definition and configuration of switching elements Configuration of targets LED Configuration of the screens shown on the graphic LCD GE INTRO Screen ...

Страница 35: ...cillography for each bay and for the complete substation Perform operations Display and remote change of the setting of each bay GE CONF Configuration of users access levels and security passwords Configuration of bays name type etc Configuration of states measurements events etc that each Level 1 unit must send to Level 2 Configuration of databases macro operations and interlocks involving differ...

Страница 36: ...More specifically these parameters for the communication of the local HMI are as follows COMMUNICATION BAUDRATE for the relay depending on which port is being used local or remote STOP BITS for the relay depending on which port is being used local or remote To modify or view the unit s configuration parameters go to the configuration menu corresponding to section 8 KEYBOARD AND DISPLAY When connec...

Страница 37: ...f service SUCCESSIVE OP Nº 1 11 0 60 0 Out of service 0 Out of service TIME WINDOW 1 12 1 60 min 1 min MINIMUM TAP 1 13 1 40 1 MAXIMUM TAP 1 14 1 40 21 VOLTAGE TYPE 1 15 Phase to ground phase to phase Phase to ground DIR INV MODE 1 16 DIR INV DIR FACTOR CAL 1 17 950 1050 1000 REGULATION SETTINGS X1 0 INSENSITIVITY X1 1 0 5 5 of Vn 1 TIME FACTOR X1 2 1 100 3 ACCELERATED TAP DOWN X1 3 90 150 of Vn 1...

Страница 38: ...es on primary values It does not apply to measures for events and oscillography records since these are always secondary values 1 5 CT RATIO This setting allows the user to visualize the measured currents on primary values It does not apply to measures for events and oscillography records since these are always secondary values 1 6 ACTIVE TABLE This setting lets the user to select which of the thr...

Страница 39: ...p number available in the OLTC so when DTR reaches this tap it never will try to raise the tap even if the voltage level requires it 1 14 MINIMUM TAP This setting tells to DTR system the minimum tap number available in the OLTC so when DTR reaches this tap it never will try to lower the tap even if it is required by the voltage level 1 15 VOLTAGE TYPE To calculate cos Φ and the power values we nee...

Страница 40: ... the nominal voltage X2 BLOCK SETTINGS X2 1 OVERVOLTAGE If the measured voltage is greater than this value the operation of a DTR system in automatic mode is blocked It must be introduced in of the nominal voltage X2 2 UNDERVOLTAGE If the measured voltage is lower than this value the operation of a DTR system in automatic mode is blocked It must be introduced in of the nominal voltage X2 3 OVERCUR...

Страница 41: ...Tap Changer Controller GE 106305A 3 2 5 X4 VOLTAGE SETPOINT X4 1 SETPOINT This setting is the required voltage level This voltage level must be kept constant It must be introduced in of the rated voltage in accuracy steps of 0 1 ...

Страница 42: ...ents is used by means of GE INTRO software instruction manual GEK 105594 4 1 INPUT CONFIGURATION Each programmable input can be assigned to the following values CONFIGURABLE INPUTS Table 1 Table 2 External trigger Interlocking 1 Interlocking 2 Regulator alarm BCD_1 BCD_2 BCD_3 BCD_4 BCD_5 BCD_6 Tap up Tap down Automatic Manual Remote Local Stopped Remote Trip Tap 1 Tap 2 Tap 3 Tap 4 Tap 5 Tap 6 Ta...

Страница 43: ...to section 2 5 for further details Selection table 2 As in the previous case Interlocking 1 Used for blocking the operation of the regulation automatism in automatic mode Interlocking 2 Used for blocking the operation of the regulation automatism in automatic mode Regulator Alarm Signals the activation of the Alarm input in the commuter BCD_1 to BCD_6 Used for informing the unit using BCD Binary C...

Страница 44: ...te Trip Operation over the element associated to that input either an output contact or an operation independently from the relay operation mode Tap 1 to Tap 30 Used for informing the unit of the tap where the OLTC is located using a consistent codification in a contact per tap ...

Страница 45: ...The keypad used for accessing the different screens and operating on the existing elements in each screen is located on both sides of the graphic display as follows On the left side there are two keys with up and down arrows These arrows allow to make a selection among the different elements displayed as shown beside the arrows On the right side there are several function keys F1 F2 F3 F4 Dependin...

Страница 46: ... down stop automatic manual When selected the element will be shadowed and the F4 key will show which operation can be commanded OPERATE F4 If we press the operation key the relay will ask for confirmation or cancellation of the operation as follows CANCEL F1 CONFIRM F2 If the operation is not performed for example because there is a programmed block that disables it the display will read OPERATIO...

Страница 47: ...ith a dark shadow and blinking The blink and the shadow indicate that the alarm has not been acknowledged In order to acknowledge the alarm we must press F2 as indicated in the help text shown at the bottom of the screen Once the alarm has been acknowledged it stops blinking and the shadow disappears but the alarm text remains on the screen until the reason that produced it disappears At the botto...

Страница 48: ...ed on an alarm its colour is shown in negative By pressing F3 we automatically acknowledge all the alarms appearing on the alarms screen 4 7 MEASURES SCREEN If we move from the alarms screen to the measures screen the display will look as below The displayed values are values on the primary side 4 8 INPUTS OUTPUTS SCREEN From the measures screen we can move to the inputs outputs screen by pressing...

Страница 49: ...4 PROGRAMMING THE UNIT 48 DTR Digital Tap Changer Controller GE 106305A ...

Страница 50: ...Vdc 13 14 0 0 Standard model X X Special models Note All units have a front RS232 communications port Special model 01 incorporates in addition to the BCD coded input tap changer the possibility to use one contact per tap There is no additional setting instead when programming using GE INTRO inputs as Tap1 Tap2 etc the unit assumes that the tap status will be made following the code one contact pe...

Страница 51: ... 20ºC Repetitivity 50 PPM Error by temperature 35 PPM from 20ºC to 55ºC Stability 5 PPM according to MIL C3098F hysteresis 0 04 Hz when a stable frequency generator is used for example Multiamp EPOCH20 in fixed frequency position either 50 or 60 Hz ELECTRICAL CHARACTERISTICS Frequency 50 or 60 Hz Rated Voltage 90 to 220 Vac Auxiliary Voltage 48 125 Vdc or 100 250 Vdc depending on model 20 Input au...

Страница 52: ...6 commuted electromechanical Contact material Silver alloy for inductive loads Maximum ranges for 100000 operations VOLTAGE CLOSING continuous CLOSING 0 2 sec BREAKING MAXIMUM LOAD DC resistive 24 Vdc 16 A 48 A 16 A 384W 48 Vdc 16 A 48 A 2 6 A 125W 125 Vdc 16 A 48 A 0 6 A 75 W 250 Vdc 16 A 48 A 0 5 A 125 W DC Inductive 24 Vdc 16 A 48 A 8 A 192 W 48 Vdc 16 A 48 A 1 3 A 62 W 125 Vdc 16 A 48 A 0 3 A ...

Страница 53: ...auds Physical media RS232 ports 1 2 Plastic fiber optic port 2 Optional Type of connector HFBR 4516 Typical emitted power 8dBm Receiver s sensitivity 39dBm Wave length 660 nm Glass fiber optic port 2 Optional Type of connector STA Typical emitted power 17 5 dBm Receiver s sensitivity 24 5 dBm Wave length 820 nm RS485 port 2 optional ...

Страница 54: ...7 90 IEC 255 5 IEC 255 6 and IEC 68 Test Standard Class Isolation and voltage impulse IEC 255 5 600V 2kV 50 60 Hz 1 minute Shock wave IEC 255 5 5 kV 0 5 J Interferences 1 MHz IEC 255 22 1 III Electrostatic discharge IEC 255 22 2 EN 61000 4 2 IV 8 kV Immunity to radiated interferences IEC 255 22 3 III Radiated electromagnetic fields modulated in amplitude ENV 50140 10 V m Radiated electromagnetic f...

Страница 55: ...5 TECHNICAL CHARACTERISTICS 54 DTR Digital Tap Changer Controller GE 106305A ...

Страница 56: ...ty but also on behavior against electromagnetic interference All the modules are of draw out type enabling easy maintenance and repair of the equipment The DTR also incorporates a plastic antitampering front cover This cover keeps the relay sealed and provides a high protection against dust and water IP51 index according to IEC 529 The use of a push button allows access to the main functions witho...

Страница 57: ...ly the board includes the front communications connector the switch for local remote operation selection of the control position and the bicolor LED indicator of the equipment state The front module is mechanically and solidly connected to the keypad board the electrical connection is done through a flexible flat cable of 12 pins The subgroup formed by these two front boards is connected to the re...

Страница 58: ... the relay from the back In the terminal blocks each of the 12 terminals of each block is identified from the top to the bottom by a number between 1 and 12 that is serigraphied on the cover close to each connector at the input side of the connection cables The connector terminals for synchronization are identified by IRIG B serigraphy and the terminals polarity is indicated by and For relays with...

Страница 59: ...the following channels Internal communication with the protection and control CPU modules Local mode communication with a PC by the front communications port Remote mode communication by rear communication port Man machine interface by means of keypads and displays alphanumerical and graphical 6 1 8 DIGITAL INPUTS BOARD The design of the DTR has been done for assuring the maximum capacity of input...

Страница 60: ... for the operation of the DMS modules circuitry in this case 8V subsequently regular to 5 V for the logic and 24 V for the tripping activation Four relays with the same characteristics as the ones included in the outputs board 2 relays for tripping functions and 2 relays for reclosing An auxiliary relay for equipment alarm As regards the power supply board we should emphasize that One passive filt...

Страница 61: ...es of the equipment It is not necessary to have access to the lateral surfaces of the equipment mounted Dimensions and panel drilling for boxes of a 19 rack 4 units high in shown in Figures 2 and 4 7 ACCEPTANCE TESTS In this section we will explain the different tests that allow verification of the complete functionality of a DTR protection equipment For a given DTR equipment only those tests corr...

Страница 62: ...t is powered and close when it is not powered Configure as trips all the configurable contacts In this condition check that the relay communicates correctly using a PC Request the relay model using GE LOCAL software The minimum and maximum voltage values to be applied to each model are as follows Model G Maximum voltage 150 Minimum voltage 38 4 Model H Maximum voltage 300 Minimum voltage 88 ...

Страница 63: ...current values from the table at the specified network frequency 2 Current shall be applied through A1 A2 3 Verify that the relay measures the frequency voltage and current with an accuracy of 5 and P Q cos φ with an accuracy of 6 7 5 VERIFICATION OF INPUTS 1 Apply to each input a voltage at 20 lower than the minimum admissible voltage for the input circuits 2 Check that the relay acknowledges as ...

Страница 64: ...lay model through the remaining rear port previously checking that the PC communication parameters are the same as the relay s 7 7 DISPLAY KEYPAD AND LEDS 1 Press the following keys in the shown order and check that the display shows the attached messages KEY MESSAGE SET SEE PROTECTION SETTINGS CLR DTR GENERAL ELECTRIC INF STATUS ENT MODEL UP arrow DATABASE DOWN arrow MODEL CLR STATUS CLR DTR GENE...

Страница 65: ...NCE FUNCTION S1 TAP UP COMMAND S12 OVERCURRENT S2 TAP DOWN COMMAND S13 LOCAL S3 AUTOMATIC S14 REMOTE S4 MANUAL S15 SUCCESSIVE OPER S5 STOPPED S16 EXCESSIVE OPER S6 SYSTEM READY S17 TAP BCD 1 S7 STOP COMMAND S18 TAP BCD 2 S8 COMMAND NOT EXECUTED S19 TAP BCD 3 S9 IRREGULAR TAP CHANGE S20 TAP BCD 4 S10 UNDERVOLTAGE S21 TAP BCD 5 S11 OVERVOLTAGE S22 TAP BCD 6 7 8 1 VERIFICATION OF ALARM CONTACTS LOCAL...

Страница 66: ...activate this input and check that S5 remains deactivated S7 deactivates 7 8 3 VERIFICATION OF THE TAP UP TAP DOWN COMMANDS OPERATION For the following tests maintain the front switch as REMOTE Apply a voltage of 100 V through terminals A7 A8 Apply a pulse to the MANUAL input so that the relay switches to MANUAL mode and then apply a pulse to the TAP UP input and check that S8 is deactivated and S...

Страница 67: ...vates Set the rated current to 5 A and apply 8 A between terminals A1 A2 Check that S12 activates 7 9 DYNAMIC VERIFICATION OF THE REGULATOR OPERATION For an adequate and easy testing we strongly recommend to wire at least the inputs associated to the first six taps towards breakers and apply voltage to inputs through them It is required to follow the sequence in the shown order These instructions ...

Страница 68: ...uts E1 E2 E3 E4 E5 and E6 1 Activate E1 The relay will show that it is on Tap 1 2 Apply a pulse to TAP UP and wait for S1 to activate 3 Deactivate E1 and activate E2 Move from Tap 1 to Tap 2 4 Apply a pulse to TAP UP and wait for S1 to activate 5 Activate E1 Move from Tap 2 to Tap 3 6 Apply a pulse to TAP UP and wait for S1 to activate 7 Deactivate E1 and E2 and activate E3 Move from Tap 3 to Tap ...

Страница 69: ...Move from Tap 2 to Tap 3 6 Apply a pulse to TAP UP and wait for S1 to activate 7 Deactivate E1 and E2 and activate E3 Move from Tap 3 to Tap 4 8 Apply a pulse to TAP UP and wait for S1 to activate 9 Activate E1 Move from Tap 4 to Tap 5 10 Apply a pulse to TAP UP and check that S15 activates With the previous settings set the COUNTERS and No OPERATIONS settings to 0 and after the following sequence...

Страница 70: ...ectly protected In addition this connection also guarantees the physical safety of the personnel who have to touch the relay since the whole casing is connected to ground 8 3 MAINTENANCE Given the important role that the protection relays play in the operation of any installation a periodical program of tests is highly recommended The unit incorporates built in diagnostic functions which permit im...

Страница 71: ...8 INSTALLATION AND MAINTENANCE 70 DTR Digital Tap Changer Controller GE 106305A ...

Страница 72: ...y pressing the INF key Operations This menu allows to synchronize the relay date and time Tap up Tap down Switch the regulator to manual mode Switch the regulator to Automatic mode Stop the regulator Trigger the communications This menu is accessed by pressing the ACT key Settings This menu allows to view and modify all the relay settings This menu is accessed pressing the SET key Configuration Me...

Страница 73: ...ertain setting When we find the desired option we can select it using ENT 9 1 MENU TREE The DTR has different menus divided in levels Level 0 is the stand by screen For accessing Level 1 we must press the key corresponding to a group SET INF etc Inside a level we can move using keys For descending to Levels 2 and 3 we must press the ENT key For ascending inside the menu tree we must press the CLR ...

Страница 74: ...splays the regulator status DATE TIME Displays the relay date time 7169 BAUDRATE Remote baudrate NET STOP BITS Stop bits of the remote communication LOC BAUDRATE Local communication baudrate LOC STOP BITS Stop bits for the local communication LOCAL SETTINGS Allows the settings modification in local mode REMOTE SETTINGS Allows the settings modification in remote mode LOCAL OPERATIONS Allows to comm...

Страница 75: ...STATUS Used for turning the relay in service or out of service In service Out of service MODIFY PROTECTION SETTINGS IDENTIFICATION 20 character alphanumerical chain FREQUENCY Rated frequency 50 60 Hz VT RATIO VT transformation ratio 1 4000 in steps of 1 CT RATIO CT transformation ratio 1 4000 in steps of 1 ACTIVE TABLE Active settings table 1 3 ALGORITHM Type of regulation algorithm 1 VOLTAGE 2 CO...

Страница 76: ...n factor 0 10 Vn MAX COMPENSATION Maximum elevation per compensation 3 15 Vn BLOCKING SETTINGS T1 TABLE 1 OVERVOLTAGE Blocking level by overvoltage 110 180 Vn Note this group is repeated for tables 2 and 3 UNDERVOLTAGE Blocking level by undervoltage 0 90 Vn OVERCURRENT Blocking level by overcurrent 0 200 Vn TIMERS T1 TABLE 1 OPERATION PULSE Output pulse duration for increasing decreasing commands ...

Страница 77: ... available list using 5 Press the ENT key If we wish to modify another setting inside the same group repeat steps 3 to 5 6 Press the END key The relay will ask for confirmation displaying the following message CONFIRM Y N 7 Press 1 Y to confirm the change otherwise press 3 N 8 The relay will then display the following message SETTINGS CHANGE EXECUTED 7 Press CLR repeatedly to return to stand by st...

Страница 78: ...oltage referred to the primary Frequency Network frequency Tap OLTC tap position V secondary Voltage referred to the secondary P active Active power Q reactive Reactive power Cos phi Power factor Setpoint Programmed voltage setpoint V rated Rated voltage V difference Difference between the setpoint and the measured voltage Operation T Foreseen operation time according to the setting curve RELAY ST...

Страница 79: ...ion of irregularities in the change EXCESSIVE OP Monitors if there has been an excessive number of tap up tap down operations LOCAL CONNECT Monitors whether the connection is local remote DATE TIME Monitors whether the relay date time is reliable COMM E2PROM Informs of a detected error in the communications EEPROM COMM SETTINGS Shows whether the communication settings are the default or the user s...

Страница 80: ...sing the operations group we must press the ACT key from the stand by screen For modifying the date time follow the steps below DTR ACT SET ENT YEAR GENERAL ELECTRIC DATE TIME 02 ENT MONTH ENT DAY ENT TIME 02 09 10 ENT MINUTE ENT SECOND ENT 09 02 2002 20 30 10 20 30 NOTE For modifying the numerical value displayed by default press the CLR key for deleting the current value The execution of the COM...

Страница 81: ...essage The available information in this operation mode is as follows Current Displays the Phase A current in amperes referred to the primary side V primary Displays the phase voltage in kV referred to the primary side Frequency Displays the actual frequency value Tap Displays the OLTC tap position RELAY STATUS Indicates whether the relay is in service or out of service ACTIVE TABLE Indicates whic...

Страница 82: ...ial line This setting is treated as a binary logic setting selected by the logic key 1 Y for 1 and 3 N for 2 LOC BAUDRATE Is the baudrate used by the DTR in serial communications with the local controller The possible baudrate range is 1200 to 19200 bauds LOC STOP BITS Same setting as in the remote case but referred to local communications LOCAL SETTINGS This setting enables disables the setting c...

Страница 83: ...9 KEYPAD AND DISPLAY 82 DTR Digital Tap Changer Controller GE 106305A ...

Страница 84: ...r 83 FIGURE LIST Fig 1 External connections for DTR units with taps coded in BCD Fig 2 External connections for DTR units with taps per contact Fig 3 Panel mounting diagram Fig 5 RS 232 connection Fig 6 Dimensions diagram Fig 7 Front view Fig 8 Rear view ...

Страница 85: ...FIGURES 84 DTR Digital Tap Changer Controller GE 106305A FIGURE 1 WIRING DIAGRAM FOR DTR UNITS WITH TAPS CODED IN BCD ...

Страница 86: ...FIGURES GEK 106305A DTR Digital Tap Changer Controller 85 FIG 2 WIRING DIAGRAM FOR DTR UNITS WITH TAPS BY CONTACT ...

Страница 87: ...FIGURES 86 DTR Digital Tap Changer Controller GE 106305A FIGURE 3 PANEL MOUNTING DIAGRAM ...

Страница 88: ...FIGURES GEK 106305A DTR Digital Tap Changer Controller 87 FIGURE 4 RS 232 CONNECTION ...

Страница 89: ...FIGURES 88 DTR Digital Tap Changer Controller GE 106305A FIGURE 5 DIMENSIONS DIAGRAM ...

Страница 90: ...FIGURES GEK 106305A DTR Digital Tap Changer Controller 89 FIGURE 6 FRONT VIEW ...

Страница 91: ...FIGURES 90 DTR Digital Tap Changer Controller GE 106305A FIGURE 8 GENERIC REAR VIEW ...

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