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GE MLP1000 Manual
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GE MLP1000 Manual

Microprocessor based distance protection
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MLP
G G E E K K - - 98846
98846A A
Click here to get to our homepage:
http://www.gemultilin.com/
GE Power Management
MLP
MICROPROCESSOR BASED
DISTANCE PROTECTION

"We bring good things to life"

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Summary of Contents for GE MLP1000

  • Page 1 G G E E K K - - 98846 98846A A Click here to get to our homepage: http://www.gemultilin.com/ GE Power Management MICROPROCESSOR BASED DISTANCE PROTECTION “We bring good things to life”...

  • Page 2: Table Of Contents

    GEK-98846A TABLE OF CONTENTS 1. DESCRIPTION ......................3 2. APPLICATION ......................6 3. CHARACTERISTICS....................7 3.1 GENERAL CHARACTERISTICS ................7 3.2. TECHNICAL SPECIFICATIONS................8 3.3 SETTINGS RANGES AND VALUES ..............11 3.4 INTERRELATIONS BETWEEN SETTINGS ............18 4. PRINCIPLES OF OPERATION ................19 4.1 INPUTS ........................
  • Page 3 GEK-98846A 5.4.10 SINGLE KEY OPERATIONS ................ 58 5.4.11 CONFIGURATION UNIT ................58 5.4.12. INTERACTION OF THE KEYBOARD WITH REMOTE COMMUNICATIONS61 6. ACCEPTANCE TESTS................... 62 6.1 FUNCTIONAL TESTS ..................62 6.2 ACCEPTANCE TESTS..................62 6.2.1 INITIAL CONFIGURATION ................62 6.2.2 INPUT CONTACT ..................65 6.2.3.

  • Page 4: Description

    GEK-98846A 1. DESCRIPTION The MLP system is a digital multiprocessor which provides three phase trip distance protection and automatic reclosing as analysis and control functions. It is designed for the protection, control, and monitoring of lines and cables with voltage levels up to 132 kV and distances up to 150 km.
  • Page 5 GEK-98846A Scaled range. Zone 1 extension. Zone 2 acceleration. (MLP3000 only) − The last two schemes cannot be selected simultaneously. The scaled range scheme will stay active even when any of the other two diagrams has been selected. The last scheme requires an existing communications channel between the protections on both sides of the line.
  • Page 6 GEK-98846A − Fuse failure detector in voltage measuring circuits. − Remote open detector (without communications channel). (MLP3000) − Fault selector − Fault locator (MLP 3000). − Oscillographic register that retrieves seven fault situations, which are stored for at least two hours in the event of a power loss. (MLP4000) The oscillographic register retrieves data such as the waves of the three currents and voltages, status of the inputs and outputs, distance protection signals, reclosing signals and blocking signals.

  • Page 7: Application

    GEK-98846A 2. APPLICATION In its three versions (MLP1000, MLP2000, MLP3000 and MLP4000) the MLP is a distance relay whose application range is in sub-transmission and distribution lines, in power levels of up to 66 kV and exceptionally up to 132 kV in lines with 3 phase trip.

  • Page 8: Characteristics

    - LED indicator for READY status. - Built-in keyboard and display. - Highly reliable solid state component. - Microprocessor system. - Self-checks (monitoring). MODEL SELECTION DESCRIPTION MLP1000 Family MLP2000 Family MLP3000 Family MLP4000 Family Without test block (optional) With test block (standard) In=1A...

  • Page 9: Technical Specifications

    GEK-98846A Current or power log Communications MLP2000: Features similar to those shown for MLP 1000 plus the reclosing operation. MLP3000: Features similar to those shown for MLP2000 plus following additional functions: Zone 2 acceleration (with channel) Fault locator Oscillography register Fault report 3.2.
  • Page 10 GEK-98846A Trip contact capacity: Make and Carry: 3000 W resistive during 0.2 seconds with a maximum of 35 A and 380 VDC. Break: 150 W resistive, with a maximum of 8 A or 380 VDC. Carry Continuously: 8 A. Make/Break delay: 10 ms/ 4 ms Transmission start contact (REED relay): Break: 20 W with 0.5 mA maximum or 500 VDC maximum Make delay: 0.5 ms...
  • Page 11 GEK-98846A Type Tests: Insulation test: 2 kV 50/60 HZ during 1 min (IEC 255-5). Impulse test: 5 kV peak 1.2/50 aes, 0.5 J (IEC 255-5). 1 MHz noise test: 2.5 kV common mode. 1 kV differential mode, Class III (IEC 255-22-1) Electrostatic discharge: Class III (IEC 255-22-2) Radio Interference:...

  • Page 12: Settings Ranges And Values

    GEK-98846A 1 to 7 in steps of 0.1 Positive sequence angle: 10° to 90° in 0.5° steps Homopolar sequence angle: 10° to 90° in 0.5° steps Operating time setting: Zone I: 0 to 500 ms in 1 ms steps Zone II: 100 ms to 3 s in 1 ms steps Zone III: 120 ms to 10 s in 1 ms steps Protection Schemes: Scaled distance...
  • Page 13 GEK-98846A 002 BREAKER NUMBER: 4 characters ASCII to identify the breaker associated with each MLP unit. As with the identification, the breaker number can be modified only via serial communications, not from the keyboard. 101 LINE DISTANCE: The fine distance protected by the MLP system, can be set from 0.4 at 150 km, in steps of 0.01 or 0.4 at 90 miles, in steps of 0.01, depending on relay configuration.
  • Page 14 GEK-98846A 112 ALLOW TRIP BLOCK INPUT (TRP_B): Enable or disable. 113 ALLOW BREAKER STATUS INPUT (52B): Enable or disable. 114 AMPS ACCUMULATED IN BREAKER OPENINGS: Adjustable from 0 to 100.000 (kA2), in steps of 1. Each time the breaker is opened, (kA2) is incremented by the number passing through the three phases at the moment of opening.
  • Page 15 GEK-98846A 208 PROTECTION SCHEME: Select between the following protection schemes: 0 - Scaled distance. 1 - Zone 1 extension. 2 - Zone 2 acceleration. (MLP3000) When selecting scheme 1 or scheme 2, scheme 0 is also selected. 209 PROTECTION IN SERVICE: Enable or disable the MLP distance protection.
  • Page 16 GEK-98846A 219 POSITIVE SEQUENCE LINE IMPEDANCE MODULE: Variable between 0.01 and 12x5/In Ohms, in 0.001 Ohm steps. 220 POSITIVE SEQUENCE ANGLE OF MAXIMUM REACH: Variable between 10° and 90°, in 0.50 steps. 221 ZERO SEQUENCE CURRENT COMPENSATION: The zero sequence impedance module may be between 1 and 7 times the positive sequence impedance module, in 0.01 Ohm steps.
  • Page 17 GEK-98846A 227 REACTANCE CHARACTERISTIC ANGLE: In case of selecting the minimum reactance for the phase-ground distance measuring unit in Zone 1, the characteristic angle may vary between 70° and 90°, in 0.5° steps. 228 ZONE 1 TRIP TIMER: Variable between 0 and 500 ms in 1 ms steps. 229 ZONE 2 TRIP TIMER: Variable between 100 and 3000 ms in 1 ms steps.
  • Page 18 GEK-98846A Variable between 0.20 s and 99.00 s, in 0.01 s steps. 306 TIME DELAY FOR RECLOSING CONDITIONS: (MLP2000 and MLP3000) Variable between 0.10 s and 99.00 s, in 0.01 s steps. (See 4.9) 307 DWELL TIME: (MLP2000 and MLP3000) Variable between 0.10 s and 99.00 s, in 0.01 s steps.

  • Page 19: Interrelations Between Settings

    You may not disable this setting if the setting 302 RECLOSING WAIT CONDlTIONS has been set to YES. 108 ALLOW CARRIER RECEIVER INPUT (RC\TR): (MLP1000) You may not disable this setting if the setting 208 PROTECTIONS SCHEME has been set to zone II acceleration.

  • Page 20: Principles Of Operation

    4. PRINCIPLES OF OPERATION 4.1 INPUTS The external connections of the MLP protection system can be seen in diagrams 3.1, 3.2, 3.3 and 3.4 (MLP1000), 3.5, 3.6,3.7, and 3.8 (MLP2000), 3.9, 3.10, 3.11, and 3.12 (MLP3000). Digital Inputs The protection system includes the following digital inputs:...

  • Page 21: Current And Voltage Measuring

    GEK-98846A CC-5: Reclosing block (to the recloser /MLP2000 and MLP3000) CC-6: Carrier reception (to the protection /MLP3000) CC-7: Extended Zone I pull back (to the protection) CC-8: Reclosing disable (to the recloser /MLP2000 and MLP3000) Initiate reclosing and block reclosing signals may also reach the recloser from the protection system.

  • Page 22: Distance Measuring Units (Dmu)

    GEK-98846A three ground-phase voltages from the analog/digital converter . These samples are corrected according to the gains applied during the extension period. The fundamental component phasors for the for the three currents and phase voltages are obtained (in rectangular coordinates) from the instantaneous samples and previous samples using a phasor identification algorithm based on the "minimum squares algorithm".
  • Page 23 GEK-98846A VØn: Phase-ground voltage VØ1m: Positive sequence voltage with memory related to the 0 phase IØ: Phase current. Zero sequence current Θ1 : Angle of the positive sequence line impedance Θ0: Angle of the zero sequence line impedance Zero sequence compensation constant IØ2: Negative sequence current related to the 0 phase IØØ:...

  • Page 24: Protection Schemes

    GEK-98846A Overcurrent supervision of the DMU The ground fault measuring units are supervised by IØs detectors. The phase to phase fault measuring units phases are supervised by IØØs detectors. This way, although the difference of the operation and polarization quantity arguments, for example, of the AG unit, is between +90°...
  • Page 25 GEK-98846A 3 - Fault inside the zone 3 reach or overreach. 4 - Remote open detector. 5 - Line pick up. Since it is a three phase trip protection, the type of fault detected (single phase, two phase, or three phase) is irrelevant at the time of the tap decision. therefore the type of fault is not mentioned.

  • Page 26: Line Pick Up Unit (Lpu)

    GEK-98846A Once the protection trip is produced, the process is identical to those of the previous fault. Zone 1 extension The zone 1 extension scheme covers the part of the line not covered by the zone 1 reach (typically 20% of the line length). channel.

  • Page 27: Remote Open Detector Unit (Rod) (Mlp3000)

    GEK-98846A 4.6 REMOTE OPEN DETECTOR UNIT (ROD) (MLP3000) The remote open detector unit operates when the breaker on the remote side opens during an unbalanced internal fault. This characteristic allows the accelerated isolation of faults. In the absence of this unit, a sequential trip will be provoked. In this Way it allows a rapid trip in the local extreme, for faults inside the line but outside zone 1 reach without using a communications carrier.

  • Page 28: Fuse Failure Unit (Ff) (Mlp3000)

    GEK-98846A 4.8 FUSE FAILURE UNIT (FF) (MLP3000) The fuse failure detector of the voltage transformers is designed to operate when one or two phases of the alternating voltage is lost. This situation may be interpreted by the distance measuring units as a fault and provoke a trip in the absence of a fault. Therefore the detection of a fuse failure blocks any protection trip.
  • Page 29 GEK-98846A The L/O_M and RST_L/O_M arrive through a command via the relay keyboard or the remote communications system. Outputs: - In progress (CC). - Fault cleared (FD). - Breaker closed (reclosing) (RCL). - Recloser blocked (L/O). - Extended Zone 1 pulled back (RZIX). Of these signals only the reclosing or close signal include non-programmable contacts;...
  • Page 30 GEK-98846A The programmed time that passes from the time a successful reclose until returning to the stand-by state. This timer is also used to exit a blocked state and move into the stand-by state, and finally for the vigilance of a successful close after a manual order.

  • Page 31: Direction Indicator

    GEK-98846A 4. 10. DIRECTION INDICATOR The MLP has a phase direction indicating unit that provides information of whether the direction of the current circulating through the line is in the trip direction or the opposite direction. The measurement is obtained by measuring the lag between the voltage and the phase current The direction indicator is activated when the phase difference between V0 and I0, is less than 90°...
  • Page 32 GEK-98846A * Alarms: A critical error exists. 15V power in the danger zone. Breaker needs maintenance. Current passing with the breaker open. No clock:: needs synchronism. DEFAULT SETTINGS. DEFAULT CALIBRATION. * Relay inputs Recloser inhibition. Extended Zone 1 pullback. Reclosing block. Reclosing initiate.

  • Page 33: Event Register

    GEK-98846A 4.12 EVENT REGISTER The MLP includes an event register that stores all actions performed within the relay, whether by the relay itself or by external operation. Each event consists of: * Cause that generated the event. * Date-time: day, month, hour, minute, second and hundreds of a second. * MLP general status: Hardware critical error exists.

  • Page 34: Oscillographic Register

    GEK-98846A - Fault successfully cleared. - Reclosing initiate. - Breaker status input (57B) disabled. - External trip block input disabled. - Line pick up (LPU) input disabled. - Initiate reclosing input disabled. - Block reclosing input disabled. - Z1X pull back input disabled. - Reclosing inhibition input disabled.
  • Page 35 GEK-98846A * Secondary voltage waves of phases: A, B, C. Digital signals: - Reclosing disabled. - Extended zone l pull back. - Transmission reception. - Reclosing block. - Reclosing initiate. - Line pick up. - External trip block. - Breaker status 52/b. Recloser signals: - Permanent fault.

  • Page 36: Fault Locator (Mlp3000)

    GEK-98846A Zone 1 or zone 2 distance measuring units: DMUZIAG, DMUZlBG, DMUZ1CG, DMUZ1AB, DMUZlBC, DMUZlCA. Zone 3 distance measuring units: DMUZ3AG, DMUZ3BG, DMUZ3CG, DMUZ3AB, DMUZ3BC, DMUZ3CA. Fault report: In the case of a trip the values mentioned below are saved as a fault report: - Prefault values IA.

  • Page 37: Breaker Supervision

    GEK-98846A Each minute the MLP measures the current passing through phase A. The highest value from all of the measurements collected over one hour is saved, providing it does not surpass the value of 1.5 * In or any Zone III unit has activated (DMUZ3). The hourly register saves the data registered for a week in a circular stack that when completed, automatically substitutes the oldest data by the newest.

  • Page 38: Self Checks And Error Routines

    GEK-98846A 4.17 SELF CHECKS AND ERROR ROUTINES. The MLP performs the following self checks during startup as well during the idle time when protection and communications functions are not being performed: − Analog digital converter. − Power supply (15 V) −...
  • Page 39 GEK-98846A EEPROM errors. The EEPROM can have two types of critical errors: 1 - A malfunction of the chip: in this case the protection enters the infinite loop of the boot program described above and the HW ERROR signal is activated. 2 - The settings or the calibration have deteriorated: in this case protection attempts to retrieve the settings or calibration or set the defaults.
  • Page 40 GEK-98846A Protection Settings: OUT OF STEP BLOCKING (OSB) IN SERVICE: LINE PICK UP (LPU) IN SERVICE: REMOTE OPEN DETECTOR (ROD) IN SERVICE FUSE FAILURE (FF) IN SERVICE ALLOW RECLOSES AFTER A TRIP IN ZONE II ALLOW RECLOSES AFTER A TRIP IN ZONE III: MHO OR REACTANCE CHARACTERISTIC: PROTECTION SCHEME: Scaled Distance...

  • Page 41: Outputs

    GEK-98846A Recloser setting: NUMBER OF RECLOSING ATTEMPTS: Disable (0) RECLOSING WAIT CONDITIONS: TIME DELAY FOR THE FIRST RECLOSING ATTEMPT: 0.2 s TIME DELAY FOR SECOND RECLOSING 0.2 s ATTEMPT: TIME DELAY FOR THIRD RECLOSING ATTEMPT: 0.2 s TIME DELAY FOR RECLOSING CONDITIONS: 0.1 s DWELL TIME: 0.1 s...
  • Page 42 GEK-98846A The relay includes seleccionable contacts; each contact may be assigned to one of the logical quantities in List - 2. List-2: - Reclosing initiate. (MLP2000 and MLP3000) - Reclosing block. (MLP2000 and MLP3000) - Fuse failure. - LPU trip. - Breaker failure initiate.

  • Page 43: Operations

    GEK-98846A Configurable output selection is performed in the factory when ordered. 4.19 OPERATIONS The MLP program allows the following operations to be performed: - Breaker opening. - Breaker close. - Recloser block. (MLP2000 and MLP3000). - Recloser unblock (MLP2000 and MLP3000). - Relay synchronism The synchronism operation can only be performed via serial communications, not through the relay keyboard.

  • Page 44: Communications

    GEK-98846A 5 COMMUNICATIONS 5.1 REMOTE COMMUNICATIONS The user can communicate with the MLP in two modes: - Local: Communications are accomplished through the keyboard and monitor situated on the front panel of the relay. - Remote: Communications are accomplished through the serial port located on the rear panel of the relay.
  • Page 45 GEK-98846A Causes of critical errors are: - A/Ds error - Loss of 15 VDC - ROM error - RAM error - E2PROM settings and configuration error - System keyboard-monitor memory error To avoid inadvertently leaving the trips disabled when the relay is put into service, the MLP will display a "TRIP INACTIVE”...

  • Page 46: Relay Data

    GEK-98846A 5.3 RELAY DATA The following sections will explain the complementary information, supplied by the relay. The rest of the information such as: view settings and their modifications, operations, settings configuration, etc. is sufficiently explained in the corresponding sections of this manual.

  • Page 47: Currents And Voltage Logs

    GEK-98846A Using the Mlink program, an event log can be saved to a file and later used as an input data file for application programs executed by the user. 5.3 2 CURRENTS AND VOLTAGE LOGS The MLP provides an hourly log of the maximum load current or power which permits the user to view the load of the protected line or the active or reactive power.
  • Page 48 GEK-98846A ↑ ↓ The local mode communications system is comprised of a series of tree structured menus and warning screens The warning screens contain information related to the last fault cleared and relay power errors and initialization. When you apply power to the relay for the first time a standby screen is displayed: GENERAL ELECTRIC The screen changes rapidly displaying the last fault stored by the protection:...
  • Page 49 GEK-98846A TRIP INACTIVE indicating previously listed errors. If a fault occurs, a message such as the following will appear: TRP AG Z1 27 13APR 13:07:0050 where. TRP or BLQ when the trip has been disable is blinking, 'AG' indicates the type of fault 'Z 1' indicates the type of trip '27' indicates the distance in kilometers or miles '13APR 13:07:0050' indicates the date and time the fault occurred.

  • Page 50: Information Group

    GEK-98846A ↑/↓ Changes the option. This is equivalent to lateral movement within the circular menu. When the desired option appears on the screen, use the ENT key to select it. The use of these keys and others, minus generic keys, (together with concepts such as circular.

  • Page 51: Event Logs

    GEK-98846A To descend within the menu tree and enter into the information group press the ENT key. To ascend within the menu tree or return to the previous menu press the CLR key. In the current position, pressing the CLR key will display: The significance of the asterisk will be explained later in the section INTERACTION OF THE KEYBOARD WITH REMOTE COMMUNICATIONS.

  • Page 52: Current Or Voltage Logs

    GEK-98846A 5.4.4 CURRENT OR VOLTAGE LOGS As in the previous case, this type of log is available in an analog mode. If you request logs that are not available, the following message will be displayed on the monitor: DATA NOT AVAILABLE When the logs are available, the procedure is the same as with the events, with the following being displayed on the monitor RETRIEVING LOGS...

  • Page 53: Status

    GEK-98846A 41.89VAR 01DEC 07:50:2590 Pressing CLR will return you to the screen: 40.90W 01DEC 07:50:2590 To view other logs, the ↑ key advances the display through older events, while the ↓ key advances the display through newer events. The events are organized in a circular way.

  • Page 54: Operations Group

    GEK-98846A 5.4.6 OPERATIONS GROUP This group permits the user to manipulate the breaker (OPEN or CLOSE) from the keyboard, as well as BLOCK and UNBLOCK the recloser. To access this group press the ACT key when the MLP is in the standby mode. The first operation for this group will be displayed on the screen: OPEN BREAKER...

  • Page 55: View Settings

    GEK-98846A OPERATION NOT SUCCESSFUL Pressing ENT or CLR will return you to the initial menu: OPEN BREAKER 5.4.7 VIEW SETTINGS The settings group allow you to view an modify the MLP's settings. To access these options, pressing SET when the MLP is in the standby mode will display: VIEW SETTINGS pressing the ↑/↓...

  • Page 56: Modify Settings

    GEK-98846A This setting has various characteristics. It is alphanumeric, therefore you may view it on the monitor, but you may not modify it; it is 20 characters in length therefore the first 4 characters are displayed on the first line of the monitor. Pressing the ↑...
  • Page 57 GEK-98846A − Keys not configured for the setting are not acknowledged − For numeric settings, once you have entered their value you must press the ENT key to check their range. An example of this process is: You wish to change this setting to 333, therefore typing 333 displays: LINE LENGTH (KM) LINE LENGTH (KM) LINE LENGTH (KM)

  • Page 58: Settings Not Accessible From The Keyboard

    GEK-98846A Responding NO will return you to the CHANGE SETTINGS screen with all of the settings intact. If you respond YES the settings are transmitted to the protected unit with the following message being displayed on the monitor: SETTINGS CHANGED Pressing ENT or CLR will return you to the menu displayed previous to the END operation.

  • Page 59: Single Key Operations

    It is not meant as a password, but a simple measure of security to avoid accidental manipulation of the configuration. The code is 7169, which was selected because it is the corresponding ASCII code for the initials 'GE'. To enter the configuration from the standby screen, follow this example:...
  • Page 60 GEK-98846A GENERAL ELECTRIC 7 **** and the configuration menu will be displayed, where all of the settings will be shown in an integrated manner, except for the password which can only be viewed when changing SETTINGS CONF. 2400 INBMASK The value and significance of the settings on the second line are. 2400 =>...
  • Page 61 GEK-98846A Operations: Opening and closing the breaker, blocking and unblocking the recloser. This setting is considered logical with 'N' meaning enabled using the 1/Y key, and 'n' meaning prohibited using the 3/N key. Settings changes: This setting is considered logical with ‘B' meaning enabled using the 1/Y key, and ‘b' meaning prohibited using the 3/N key.

  • Page 62: Interaction Of The Keyboard With Remote Communications61

    GEK-98846A change takes effect immediately. The configuration is stored in the permanent EEPROM memory. 5.4.12. INTERACTION OF THE KEYBOARD WITH REMOTE COMMUNICATIONS In the MLP, the keyboard has priority over remote communications. When the keyboard is active, all messages specifically directed to the unit from a remote controller are responded to with the error message "RELAY BUSY".

  • Page 63: Acceptance Tests

    GEK-98846A 6. ACCEPTANCE TESTS 6.1 FUNCTIONAL TESTS Slowly apply 2200 volts RMS for the initial test and 1600 volts for following periodic tests, between all short-circuited terminals (except the "A1" terminal connected to ground) and the ease for 1 second. 6.2 ACCEPTANCE TESTS Necessary equipment: * 3 Multiamp units, or in their place 3 voltage sources, 3 current sources...
  • Page 64 GEK-98846A - distance units set to km - language set to Spanish - password set to 0 - all configurable functions enabled Testing the keyboard and monitor: Press the following keys to check the monitor readings: READING <SET> VIEW SETTINGS <up arrow>...
  • Page 65 GEK-98846A 111 - LINE PICK UP INPUT (LPU): 112 - TRIP BLOCK INPUT (TRIP_B): 113 - BREAKER STATUS INPUT (52B): 114 - ACCUMULATED AMPS: 115 - LIMIT ACCU. AMPS: 8000 200 - Protection Settings: 201- OSB IN SERVICE 202 - LPU IN SERVICE: 203 - ROD IN SERVICE: 204 - FF IN SERVICE: 205 - Z3 TRIP RECLOSING:...

  • Page 66: Input Contact

    GEK-98846A 300-Recloser Settings: 301 - NUM RCL ATTEMPTS: 302 - RECLOSING HOLD: 303 - DELAY ATTEMPT 1: 304 - DELAY ATTEMPT 2: 305 - DELAY ATTEMPT 3: 306 - HOLD TIME: 307 - DWELL TIME: 308 - RESET TIME: 003-Event Mask: Allow all events.
  • Page 67 GEK-98846A CC5 Reclosing block: With the breaker closed (CC1 \without power) check in the relay status that the recloser is in standby and upon activating the external reclosing block (CC5 with power applied) that the recloser passes to the blocked state. Next, momentarily apply the currents and voltages indicated by the AG50 fault and check that the relay trips but does not reclose with CC5 without power apply the voltage and currents indicated by the AG50 fault and check that the relay trips and recloses.

  • Page 68: Relay Measurement

    GEK-98846A 6.2.3. RELAY MEASUREMENT Apply current to the relay through the rear terminals B7-B12, bridging the terminals B8-B9 and B10-B1 land applying voltage to the terminals A2-A3, A4-A5, and A6-A7; enter into the single key menu and check that the relay correctly measures the currents and voltages applied.
  • Page 69 GEK-98846A * Set the following protection settings: 201 - OSB IN SERVICE 202 - LPU IN SERVICE 203 - ROD IN SERVICE: 204 - FF IN SERVICE: 205 - MHO/REACT: 206 - PROTEC. SCHEME: 0=D E 207 - PROT. IN SERVICE: 212 - GENERAL TRIP: 213 - Z3 TRIP: 214 - Z2 TRIP:...
  • Page 70 GEK-98846A 5. Reduce the fault current to zero. 6. Repeat the tests for faults in phases BG and CG. α = degrees that V leads I α MHOZ1ØG-5IN MHOZ1ØG-1IN In=5A In=1A Voltage Acceptable Range Voltage Acceptable Range +39.0 53.12 50.31 - :5.60 12 21 11.44 - 12.65 +49.0...
  • Page 71 GEK-98846A α MHOZ1ØG-5IN In=5A MHOZ1ØG-1IN In=1A Voltage Acceptable Range Voltage Acceptable Range +39.0 52.66 49.87 - 55.12 22.90 21.59 - 23.87 +49.0 59.54 56.38 - 62.31 25.89 24.41 - 26.98 +59.0 64.60 61.18 - 67.61 28.09 26.49 - 29.28 +69.0 67.70 64.11 - 70.86 29.44...

  • Page 72: Single Phase Measurement Unit's Reach For The Minimum Reactance Characteristic

    GEK-98846A α MHOZ3ØG-5IN In=5A MHOZ3ØG-1IN In=1A Voltage Acceptable Range Voltage Acceptable Range +39.0 53.43 50.60 - 55.92 30.53 28.84 - 31.88 +49.0 60.40 57.20 - 63.22 34.51 32.61 - 36.04 +59.0 65.54 62.06 - 68.60 37.45 35.38 - 39.11 +69.0 68.68 65.04 - 71.89 39.25...
  • Page 73 GEK-98846A 222 - ZERO SEQUENCE ANGLE(ZL0 ANGLE): 75º 223 - Z1 REACH: 4.80 224 - Z1X REACH: 1.40 225 - Z2 REACH: 9.00 226 - Z3 REACH: 20.0 228 - Z1 TIMER: 229 - Z2 TIMER: 230 -- Z3 TIMER: 6.2.5.1 REACH OF PHASE TO GROUND MEASUREMENT UNIT Z 1 (AG BG, CG) Change the settings: 213 - Z3TRIP:...
  • Page 74 GEK-98846A α= degrees that V leads I α REACTZ1ØG-5IN In=5A REACTZ1ØG-1IN In=1A Voltage Acceptable Range Voltage Acceptable Range +49.0 51.83 49.24 - 54.42 20.73 19.70 - 21.77 +59.0 45.64 43.35 - 47.92 18.25 17.34 - 19.17 +69.0 41.90 39.81 - 44.00 16.76 15.92 - 17.60 +79.0...

  • Page 75: Two Phase Measurement Unit's Reach For The Mho Characteristic

    GEK-98846A α= degrees that V leads I α REACTZ2ØG-5IN In=5A REACTZ2ØG-1IN In=1A Voltage Acceptable Range Voltage Acceptable Range +49.0 58.33 55.42 - 61.25 38.89 36.95 - 40.83 +59.0 51.36 48.79 - 53.92 34.24 32.53 - 35.95 +69.0 47.16 44.80 - 49.52 31.44 29.87 - 33.01 +79.0...
  • Page 76 GEK-98846A 229 - Z2 TIMER: 230 -- Z3 TIMER: 6.2.6.1 REACH OF PHASE TO PHASE MEASUREMENT UNIT Z 1 (AG BG, CG) Change the settings: 213 - Z3TRIP: 214 - Z2 TRIP: 215 - Z 1 TRIP: 225 - Z2 REACH: 2.00 1.
  • Page 77 GEK-98846A 6.2.6.2 REACH OF PHASE TO PHASE MEASUREMENT UNIT Z 1 (AG BG, CG) Change the settings: 213 - Z3TRIP: 214 - Z2 TRIP: 215 - Z 1 TRIP: 225 - Z2 REACH: 9.00 1. Apply the following voltages to the relay through the rear terminals A2-A3, A4-A5, A6-A7.

  • Page 78: 2 7 Non-Configurable Output Contacts

    GEK-98846A 6.2.6.3 REACH OF PHASE TO PHASE MEASUREMENT UNIT Z3 (AG,BG,CG) Change the settings: 213 - Z3TRIP: 214 - Z2 TRIP: 215 - Z 1 TRIP: 1. Apply the following voltages to the relay through the rear terminals A2-A3, A4-A5, A6-A7. THE ANGLES ARE LAGGING! VA (A2-A3) = 67 0°...

  • Page 79: Phase Selectors, Fault Locator (Mlp3000), And The Zone. Timers

    GEK-98846A - Set the following protection and recloser settings: 207 - MHO/REACT: 208 - PROTEC. SCHEME 0 = D.E. 209 - PROT. IN SERVICE 212 - GENERAL TRIP: 213 - Z3 TRIP: 214 - Z2 TRIP: 215 - Zl TRIP: 219 - POSITIVE SEQUENCE IMPEDANCE (ZL1 IMPED): 220 - POSITIVE SEQUENCE ANGLE (ZL1 ANGLE): 87°...
  • Page 80 GEK-98846A − The relay signals an AG fault in all of them. − The relay finds the fault distance in all of them with an error of less than 5%. For example: for the AG50 fault' the relay must locate the fault between 45 and 55 −...

  • Page 81: Zone 1 Extension Scheme

    GEK-98846A 6.2.8.4. 3PH FAULTS Apply the voltages and currents indicated by the faults 3PH0, 3PH25, 3PH50, 3PH75, and 3PH99 and check that: − the relay signals an 3PH fault in all of them. − the relay finds the fault distance in all of them with an error of less than 5%. For example: for the 3PH50 fault, the relay must locate the fault between 45 and 55 −...

  • Page 82: Lpu Function

    GEK-98846A Z2, BREAKER OPENED, BREAKER CLOSED, and FAULT CLEARED. Next, with the breaker closed (CC1 without power) and with channel reception (CC6 with power applied), momentarily apply the currents and voltages indicated by the AG80 fault checking that the relay trips and recloses and that the last events generated were TRIP IN ACCELERATED Z2, BREAKER OPENED, BREAKER CLOSED, and FAULT CLEARED (the event(s) MEAS_UNIT ACT and/or OPEN BRK CURR.

  • Page 83: Dd Function (Mlp3000)

    GEK-98846A 226 - Z3 REACH: 15.0 229 - Z2 TIMER: 230 - Z3 TIMER: Apply the three voltages and the phase A current as indicated by the AG99 fault (see fault list). With a delay of less than 400 ms apply the currents for phases B and C modifying their phases in such a way that the phase B and C currents are leading their respective voltages by 90°.

  • Page 84: Direction Indicators

    GEK-98846A PROHIBIT A TRIP IN ZONE 2, apply a fault in Zone 2 (i.e. AG75) and check that the relay trips in Zone 3. PROHIBIT A TRIP IN ZONE 3, apply a fault in Zone 3 (i.e. AG99) and check that the relay does not trip.

  • Page 85: Recloser (Mlp2000 And Mlp3000)

    GEK-98846A Apply the voltages and currents of a balanced system with the rated values (67 V and 1/5 A). Successively perform the open breaker and close breaker operations and check that the value accumulated by the breaker in 1 or in 25 kA according to the current applied.

  • Page 86: Configurable Outputs

    SC-5: EXTENDED ZONE 1 PULL BACK: Block the recloser, either manually (block recloser operation) or by deactivating the breaker status input and check that the corresponding output is activated. For model MLP1000 and MLP4000 in which there is no recloser, the way for activating SC-5 out put is activating CC-7 contact converter input.

  • Page 87: Out Of Step Blocking

    GEK-98846A BREAKER CLOSED 6.2.22 OUT OF STEP BLOCKING The following is an elementary test of OSB function. considering that an exhaustive test would require complex equipment. 201 - OUT OF STEP BLOCKING (OSB) IN SERVICE: 202 - LINE PICK UP (LPU) IN SERVICE: 203 - REMOTE OPEN DETECTOR (ROD) IN SERVICE: 204 - FUSE FAILURE (FF) IN SERVICE: 207 - MHO OR REACTANCE CHARACTERISTIC:...

  • Page 88: Periodic Tests And Maintenance

    GEK-98846A 7. PERIODIC TESTS AND MAINTENANCE 7.1 DESCRIPTION It is recommended to develop a periodic testing program to check all MLP functions involved in the scheme used. It is left to the users discretion which of the ACCEPTANCE TESTS should be applied depending on the installation. NOTE : The tests results performed with sine wave generator equipment must be interpreted cautiously, due to the fact that this equipment does not reflect the true behavior of the electrical system, which can be achieved in a simulator.

  • Page 89: 4 Connection Of The Test Combs

    GEK-98846A 7 4 CONNECTION OF THE TEST COMBS. The connections designated in diagrams such as TP must be performed on the relay side of the test combs. When you wish to use quantities related to the system in the test, for example standby voltage, you must bridge the relay side with the corresponding system side to the point that you wish to test.

  • Page 90: Equipment Testing Procedures And Connection After The Equipment Is Installed

    GEK-98846A 7.7 EQUIPMENT TESTING PROCEDURES AND CONNECTION AFTER THE EQUIPMENT IS INSTALLED. The same procedure can be used as for the acceptance tests once the system input and output separation measurements have been taken. When equipment testing is performed without extracting any module keep in mind that XTM test combs interrupt the trip signals and close signals only.
  • Page 91 GEK-98846A INSTALLATION The place where the relay is to be installed must be clean, dry, free of dust and excessive vibration, and well illuminated to facilitate inspection and tests. MOUNTING The MLP systems have been designed for mounting in standard 19" racks. The relay must be mounted on a vertical surface.
  • Page 92 Figure 2: Case dimensions and drilling for 1 rack. Figure 3.1: External connections MLP1000 Figure 3.2 :External connections MLP1000 Figure 3.3: External connections MLP1000 Figure 3 4: External connections MLP1000 Figure 3.5: External connections MLP2000 Figure 3.6: External connections MLP2000 Figure 3.7: External connections MLP2000 Figure 3.8: External connections MLP2000...
  • Page 93 GEK-98846A Figure 9.2: DD function diagram Figure 10.1 FF function logic Figure 10 2: FF function diagram Figure 11.1: Recloser diagram Figure 11.2: Recloser diagram Figure 11.3: Recloser diagram Figure 12 Fault selector Figure 13: Menu tree diagram Figure 14: MLP3000 settings and data Figure 15: Connection scheme for relay tests Figure 16: Figure 17: OSB functions diagram...
  • Page 94 GEK-98846A Figure 1. System diagram with MLP, CPR and TTI.
  • Page 95 GEK-98846A Figure 2. Case dimensions and drilling form 1 rack.
  • Page 96 GEK-98846A Figure 3.1. External Connections MLP1000...
  • Page 97 GEK-98846A Figure 3.2. External Connections MLP1000...
  • Page 98 M3AG, M3BG, M3CG, M3AB, M3BC, M3CA) ANY GROUND MEASURING UNIT ANY ZONE 1 GROUND MEASURING UNIT ANY ZONE 3 GROUND MEASURING UNIT ANY PHASE MEASURING UNIT ANY ZONE 1 PHASE MEASURING UNIT ANY ZONE 3 PHASE MEASURING UNIT Figure 3.3. ·External connections MLP1000...
  • Page 99 GEK-98846A Figure 3.4. External Connections MLP1000...
  • Page 100 GEK-98846A Figure 3.5. External Connections MLP2000...
  • Page 101 GEK-98846A Figure 3.6. External Connections MLP2000...
  • Page 102 GEK-98846A LIST - 2 RECLOSE INITIATE RECLOSE CANCEL BREAKER FAILURE INITIATION LINE PICK UP TRIP ZONE SWITCHING ZONE I TIMER OUT ZONE II TIMER OUT ZONE III TIMER OUT RECLOSE IN PROGRESS (RECLOSER) LOCK-OUT (RECLOSER) PULL BACK EXTENDED ZONE I ANY MEASURING UNIT (M1AG, M1BG, M1CG, M1AB, M1BC, M1CA, M3AG, M3BG, M3CG, M3AB, M3BC, M3CA)
  • Page 103 GEK-98846A Figure 3.8. External Connections MLP2000...
  • Page 104 GEK-98846A Figure 3.9. External Connections MLP3000...
  • Page 105 GEK-98846A Figure 3.10. External Connections MLP3000...
  • Page 106 GEK-98846A LIST - 2 RECLOSE INITIATE RECLOSE CANCEL FUSE FAILURE BREAKER FAILURE INITIATION LINE PICK UP TRIP ZONE SWITCHING ZONE I TIMER OUT ZONE II TIMER OUT ZONE III TIMER OUT RECLOSE IN PROGRESS (RECLOSER) LOCK-OUT (RECLOSER) PULL BACK EXTENDED ZONE I REMOTE OPEN POLE DETECTOR MEASURING UNIT ANY MEASURING UNIT (M1AG, M1BG, M1CG, M1AB, M1BC, M1CA,...
  • Page 107 GEK-98846A Figure 3.12. External Connections MLP3000...
  • Page 108 GEK-98846A Figure 4. Protection Logic...
  • Page 109 GEK-98846A Figure 5.1. Trip decision diagram...
  • Page 110 GEK-98846A Figure 5.2. Trip decision diagram...
  • Page 111 GEK-98846A Figure 5.3. Trip decision diagram...
  • Page 112 GEK-98846A Figure 5.4. Trip decision diagram...
  • Page 113 GEK-98846A Figure 6.1. Z1X protection scheme...
  • Page 114 GEK-98846A Figure6.2. ACCZ2 Protection scheme...
  • Page 115 GEK-98846A Figure7. LPU function diagram...
  • Page 116 GEK-98846A Figure 8.1. ROD function logic...
  • Page 117 GEK-98846A Figure 8.2. ROD function diagram...
  • Page 118 GEK-98846A Figure 9.1. DD function logic...
  • Page 119 GEK-98846A Figure 9.2.. DD function diagram...
  • Page 120 GEK-98846A Figure 10.1. FF function logic...
  • Page 121 GEK-98846A Figure 10.2. FF function diagram...
  • Page 122 GEK-98846A Figure 11.1. Recloser diagram...
  • Page 123 GEK-98846A Figure 11.2. Recloser Diagram...
  • Page 124 GEK-98846A Figure 11.3. Recloser Diagram...
  • Page 125 GEK-98846A Figure 12. Fault selector...
  • Page 126 GEK-98846A Figure 13. Menu Tree Diagram...
  • Page 127 GEK-98846A Figure 14. MLP3000 Settings and data...
  • Page 128 GEK-98846A Figure 15. Connection scheme for relay tests...
  • Page 129 GEK-98846A Figure 16. Power swing diagram function...
  • Page 130 GEK-98846A Figure 17. Mho / Reactance characteristics of the MLP...
  • Page 131 GEK-98846A 10. FAULT LIST SOURCE 1 VOLTAGE = 67.00 @ (3/28/1994) SOURCE 2 VOLTAGE = 67.00 @ IMPEDANCE POS. SEQ. ZERO SEQ. SOURCE 1 3.500 88.0 3.500 88.0 SOURCE 2 3.500 88.0 3.500 88.0 LINE C-D 5.000 87.0 15.50 73.0 INTERNAL LINE C-D FAULT AT .00 PER UNIT FROM BUS C IS A-G GROUND FAULT IMPEDANCE = .0000 @ .0 Relay Currents at C...
  • Page 132 GEK-98846A SOURCE 1 VOLTAGE = 67.00 @ (3/28/1994) SOURCE 2 VOLTAGE = 67.00 @ IMPEDANCE POS. SEQ. ZERO SEQ. SOURCE 1 3.500 88.0 3.500 88.0 SOURCE 2 3.500 88.0 3.500 88.0 LINE C-D 5.000 87.0 15.50 73.0 INTERNAL LINE C-D FAULT AT .25 PER UNIT FROM BUS C IS A-G GROUND FAULT IMPEDANCE = .0000 @ .0 Relay Currents at C I1 = 3.808...
  • Page 133 GEK-98846A SOURCE 1 VOLTAGE = 67.00 @ (3/28/1994) SOURCE 2 VOLTAGE = 67.00 @ IMPEDANCE POS. SEQ. ZERO SEQ. SOURCE 1 3.500 88.0 3.500 88.0 SOURCE 2 3.500 88.0 3.500 88.0 LINE C-D 5.000 87.0 15.50 73.0 INTERNAL LINE C-D FAULT AT .50 PER UNIT FROM BUS C IS A-G GROUND FAULT IMPEDANCE = .0000 @ .0 Relay Currents at C I1 = 2.903...
  • Page 134 GEK-98846A SOURCE 1 VOLTAGE = 67.00 @ (3/28/1994) SOURCE 2 VOLTAGE = 67.00 @ IMPEDANCE POS. SEQ. ZERO SEQ. SOURCE 1 3.500 88.0 3.500 88.0 SOURCE 2 3.500 88.0 3.500 88.0 LINE C-D 5.000 87.0 15.50 73.0 INTERNAL LINE C-D FAULT AT .75 PER UNIT FROM BUS C IS A-G GROUND FAULT IMPEDANCE = .0000 @ .0 Relay Currents at C I1 = 2.495...
  • Page 135 GEK-98846A SOURCE 1 VOLTAGE = 67.00 @ (3/28/1994) SOURCE 2 VOLTAGE = 67.00 @ IMPEDANCE POS. SEQ. ZERO SEQ. SOURCE 1 3.500 88.0 3.500 88.0 SOURCE 2 3.500 88.0 3.500 88.0 LINE C-D 5.000 87.0 15.50 73.0 INTERNAL LINE C-D FAULT AT .99 PER UNIT FROM BUS C IS A-G GROUND FAULT IMPEDANCE = .0000 @ .0 Relay Currents at C I1 = 2.459...
  • Page 136 GEK-98846A SOURCE 1 VOLTAGE = 67.00 @ (3/28/1994) SOURCE 2 VOLTAGE = 67.00 @ IMPEDANCE POS. SEQ. ZERO SEQ. SOURCE 1 3.500 88.0 3.500 88.0 SOURCE 2 3.500 88.0 3.500 88.0 LINE C-D 5.000 87.0 15.50 73.0 INTERNAL LINE C-D FAULT AT .00 PER UNIT FROM BUS C IS B-C GROUND FAULT ARC IMPEDANCE = .0000 @ .0 Relay Currents at C I1 = 9.571...
  • Page 137 GEK-98846A SOURCE 1 VOLTAGE = 67.00 @ (3/28/1994) SOURCE 2 VOLTAGE = 67.00 @ IMPEDANCE POS. SEQ. ZERO SEQ. SOURCE 1 3.500 88.0 3.500 88.0 SOURCE 2 3.500 88.0 3.500 88.0 LINE C-D 5.000 87.0 15.50 73.0 INTERNAL LINE C-D FAULT AT .25 PER UNIT FROM BUS C IS B-C GROUND FAULT ARC IMPEDANCE = .0000 @ .0 Relay Currents at C I1 = 7.053...
  • Page 138 GEK-98846A SOURCE 1 VOLTAGE = 67.00 @ (3/28/1994) SOURCE 2 VOLTAGE = 67.00 @ IMPEDANCE POS. SEQ. ZERO SEQ. SOURCE 1 3.500 88.0 3.500 88.0 SOURCE 2 3.500 88.0 3.500 88.0 LINE C-D 5.000 87.0 15.50 73.0 INTERNAL LINE C-D FAULT AT .50 PER UNIT FROM BUS C IS B-C GROUND FAULT ARC IMPEDANCE = .0000 @ .0 Relay Currents at C I1 = 5.584...
  • Page 139 GEK-98846A SOURCE 1 VOLTAGE = 67.00 @ (3/28/1994) SOURCE 2 VOLTAGE = 67.00 @ IMPEDANCE POS. SEQ. ZERO SEQ. SOURCE 1 3.500 88.0 3.500 88.0 SOURCE 2 3.500 88.0 3.500 88.0 LINE C-D 5.000 87.0 15.50 73.0 INTERNAL LINE C-D FAULT AT .75 PER UNIT FROM BUS C IS B-C GROUND FAULT ARC IMPEDANCE = .0000 @ .0 Relay Currents at C I1 = 4.621...
  • Page 140 GEK-98846A SOURCE 1 VOLTAGE = 67.00 @ (3/28/1994) SOURCE 2 VOLTAGE = 67.00 @ IMPEDANCE POS. SEQ. ZERO SEQ. SOURCE 1 3.500 88.0 3.500 88.0 SOURCE 2 3.500 88.0 3.500 88.0 LINE C-D 5.000 87.0 15.50 73.0 INTERNAL LINE C-D FAULT AT .99 PER UNIT FROM BUS C IS B-C GROUND FAULT ARC IMPEDANCE = .0000 @ .0 Relay Currents at C I1 = 3.965...
  • Page 141 GEK-98846A SOURCE 1 VOLTAGE = 67.00 @ (3/28/1994) SOURCE 2 VOLTAGE = 67.00 @ IMPEDANCE POS. SEQ. ZERO SEQ. SOURCE 1 3.500 88.0 3.500 88.0 SOURCE 2 3.500 88.0 3.500 88.0 LINE C-D 5.000 87.0 15.50 73.0 INTERNAL LINE C-D FAULT AT .00 PER UNIT FROM BUS C IS B-C-G GROUND FAULT ARC IMPEDANCE = .0000 @ .0 Relay Currents at C I1 = 9.571...

This manual is also suitable for:

Mlp2000Mlp3000Mlp4000

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