GE Multilin MIGII User manual

GE Multilin
215 Anderson Avenue
L6E 1B3 Markham, ON -CANADA
Tel: [phone] Fax: [phone]
E-mail: [email protected]
Internet: www.GEMultilin.com
Copyright © 2005 GE Multilin
MIGII
Digital Protection for Electrical
Machines
Instruction manual
GEK-113188A
GE Multilin
Avda. Pinoa, 10
48170 Zamudio SPAIN
Tel: [phone] Fax: [phone]
E-mail: [email protected]
gGE Consumer & Industrial
Multilin

GEK-113188A MIGII Digital Protection for Electrical Machines I
TABLE OF CONTENTS
1. GETTING STARTED 1.1 INSPECTION CHECKLIST
1.2 ENERVISTA MII SETUP SOFTWARE
1.2.1 SYSTEM REQUIREMENTS ..............................................................................1-4
1.2.2 SAFETY INSTRUCTIONS.................................................................................1-4
1.2.3 INSTALLATION..................................................................................................1-5
1.3 MII RELAY FAMILY HARDWARE
1.3.1 MOUNTING & WIRING....................................................................................1-11
1.3.2 COMMUNICATIONS........................................................................................1-11
1.3.3 FACEPLATE KEYPAD & DISPLAY.................................................................1-11
1.4 USING THE KEYPAD AND DISPLAY
1.4.1 HIERARCHICAL MENUS ................................................................................1-12
2. PRODUCT DESCRIPTION 2.1 SUMMARY
2.1.1 GENERAL OVERVIEW......................................................................................2-1
2.2 INTRO
2.3 ACCESS SECURITY FEATURES
2.4 METERING ALGORITHMS
2.5 OVERCURRENT ELEMENTS
2.5.1 PHASE TIME OVERCURRENT ELEMENT (51P).............................................2-6
2.5.2 PHASE INSTANTANEOUS OVERCURRENT ELEMENT (50P).......................2-8
2.5.3 GROUND TIME OVERCURRENT ELEMENT (51G).........................................2-8
2.5.4 GROUND INSTANTANEOUS OVERCURRENT ELEMENT (50G)...................2-8
2.6 THERMAL IMAGE ELEMENT (49)
2.7 NEGATIVE SEQUENCE ELEMENT (46)
2.8 UNDERCURRENT (37)(MIGII Q)
2.9 LOCKED ROTOR (48)(MIGII Q)
2.10 RESTRICTED GROUND DIFFERENTIAL ELEMENT (87R)(MIGII Q)
2.11 MAXIMUM NUMBER OF STARTS (66)
2.12 MULTIPLE SETTING GROUPS
2.13 MEASUREMENT AND SELF-TEST
2.13.1 MEASUREMENT.............................................................................................2-18
2.13.2 SELF-TEST......................................................................................................2-18
2.14 USER INTERFACE
2.14.1 LED TARGETS................................................................................................2-19
2.14.2 KEYPAD AND DISPLAY..................................................................................2-19
2.14.3 COMMUNICATION PORTS.............................................................................2-19
2.14.4 SOFTWARE.....................................................................................................2-20
2.15 ORDERING CODES
2.16 TECHNICAL SPECIFICATIONS.
2.16.1 PROTECTION ELEMENTS.............................................................................2-22
2.16.2 METERING FUNCTIONS................................................................................2-24
2.16.3 INPUTS............................................................................................................2-24
2.16.4 POWER SUPPLY ............................................................................................2-24
2.16.5 OUTPUTS........................................................................................................2-25
2.16.6 COMMUNICATIONS........................................................................................2-25
2.16.7 ENVIRONMENTAL..........................................................................................2-25
2.16.8 TYPE TESTS & CERTIFICATIONS.................................................................2-26
2.16.9 PRODUCTION TESTS ....................................................................................2-27
2.16.10 APPROVALS ...................................................................................................2-27

II MIGII Digital Protection for Electrical Machines GEK-113188A
TABLE OF CONTENTS
3. HARDWARE 3.1 DESCRIPTION
3.1.1 MECHANICAL DESCRIPTION..........................................................................3-1
3.1.2 MOUNTING ........................................................................................................3-2
3.1.3 REAR DESCRIPTION ........................................................................................3-3
3.2 WIRING
3.2.1 TYPICAL WIRING DIAGRAM.............................................................................3-4
3.2.2 CONTROL POWER............................................................................................3-6
3.2.3 AC CURRENT TRANSFORMER INPUTS.........................................................3-7
3.2.4 CONTACT INPUTS / OUTPUTS.......................................................................3-8
3.2.5 OUTPUT CONTACTS CONFIGURATION.........................................................3-9
3.2.6 OUTPUTS ISOLATION ....................................................................................3-10
3.2.7 RS232 FRONT COMMUNICATIONS PORT....................................................3-13
3.2.8 RS485 COMMUNICATIONS PORT .................................................................3-14
4. COMMUNICATIONS 4.1 ENERVISTA MII SETUP SOFTWARE
4.1.1 OVERVIEW ........................................................................................................4-1
4.1.2 STARTING COMMUNICATION..........................................................................4-2
4.1.3 MAIN SCREEN...................................................................................................4-2
4.2 FILE
4.2.1 NEW ...................................................................................................................4-3
4.2.2 OPEN..................................................................................................................4-3
4.2.3 PROPERTIES.....................................................................................................4-4
4.2.4 GET INFO FROM RELAY ..................................................................................4-4
4.2.5 SEND INFO TO RELAY .....................................................................................4-4
4.2.6 PRINT SETUP....................................................................................................4-5
4.2.7 PRINT PREVIEW ...............................................................................................4-5
4.2.8 PRINT.................................................................................................................4-6
4.2.9 CLOSE................................................................................................................4-6
4.3 SETPOINT
4.3.1 SETTINGS..........................................................................................................4-7
4.3.2 MAIN SETTINGS................................................................................................4-9
4.3.3 ADVANCED SETTINGS.....................................................................................4-9
4.3.4 RELAY CONFIGURATION...............................................................................4-10
4.3.5 LOGIC CONFIGURATION ...............................................................................4-12
4.3.6 CLOCK .............................................................................................................4-13
4.4 ACTUAL
4.4.1 ACTUAL VALUES ............................................................................................4-14
4.4.2 EVENT RECORDER ........................................................................................4-15
4.4.3 WAVEFORM CAPTURE ..................................................................................4-16
4.5 OPERATIONS
4.6 COMMUNICATION
4.6.1 COMPUTER .....................................................................................................4-18
4.6.2 TROUBLESHOOTING......................................................................................4-22
4.6.3 UPGRADE FIRMWARE VERSION..................................................................4-23
4.7 VIEW
4.7.1 TRACES...........................................................................................................4-26
4.7.2 MODBUS MEMORY MAP................................................................................4-27
4.7.3 LANGUAGES ...................................................................................................4-28
5. SETTINGS 5.1 SETTINGS STRUCTURE
5.2 MAIN SETTINGS
5.2.1 PRODUCT SETUP UNDERCURRENT 37 (MIGII Q).........................................5-2
5.2.2 NEGATIVE SEQUENCE IOC 46........................................................................5-4
5.2.3 LOCKED ROTOR 48 (MIGII Q)..........................................................................5-5
5.2.4 THERMAL MODEL (49) ....................................................................................5-6
5.2.5 PHASE IOC 50P.................................................................................................5-7

GEK-113188A MIGII Digital Protection for Electrical Machines III
TABLE OF CONTENTS
5.2.6 GROUND IOC 50G............................................................................................5-7
5.2.7 PHASE TOC 51P...............................................................................................5-8
5.2.8 GROUND TOC 51G...........................................................................................5-9
5.2.9 NUMBER OF STARTS 66 ...............................................................................5-10
5.2.10 F87R (MIGII P).................................................................................................5-10
5.3 ADVANCED SETTINGS
5.3.1 .........................................................................................................................5-11
5.3.2 UNDERCURRENT 37 (MIGII Q)......................................................................5-12
5.3.3 NEGATIVE SEQUENCE IOC 46 .....................................................................5-13
5.3.4 LOCKED ROTOR 48 (MIGII Q) .......................................................................5-14
5.3.5 THERMAL MODEL 49.....................................................................................5-15
5.3.6 PHASE IOC 50P..............................................................................................5-16
5.3.7 GROUND IOC 50G..........................................................................................5-16
5.3.8 PHASE TOC 51P.............................................................................................5-17
5.3.9 NUMBER OF STARTS (MIGII Q) ....................................................................5-18
5.3.10 F87R (MIGII P).................................................................................................5-19
5.3.11 USER CURVE..................................................................................................5-19
5.3.12 EVENTS AND OSCILLOGRAPHY MASKS.....................................................5-20
5.3.13 OSCILLOGRAPHY MASKS.............................................................................5-22
5.3.14 MIGII INTERNAL STATUSES..........................................................................5-22
5.4 TIME SYNCHRONIZATION
6. I/0 CONFIGURATION 6.1 INPUT CONFIGURATION
6.1.1 DESCRIPTION OF INPUTS ..............................................................................6-1
6.1.2 INPUT ELEMENTS............................................................................................6-4
6.2 OUTPUTS AND LEDS CONFIGURATION
6.2.1 DESCRIPTION OF OUTPUTS AND LEDS .......................................................6-5
6.2.2 OUTPUT AND LED ELEMENTS .......................................................................6-6
7. LOGIC CONFIGURATION 7.1 LOGIC DESCRIPTION
7.2 LOGIC ELEMENTS
8. KEYPAD AND DISPLAY 8.1 DESCRIPTION
8.2 FACEPLATE KEYPAD
8.3 ALPHANUMERIC DISPLAY AND LEDS
8.3.1 DISPLAY............................................................................................................8-3
8.3.2 LEDS..................................................................................................................8-4
8.4 OPERATIONS
8.4.1 ONE KEY OPERATION AND LAST TRIP DATA...............................................8-5
8.4.2 HMI PASSWORD...............................................................................................8-6

IV MIGII Digital Protection for Electrical Machines GEK-113188A
TABLE OF CONTENTS
9. RELAY COMMISSIONING 9.1 VISUAL INSPECTION
9.2 COMMENTS ON THE TEST EQUIPMENT
9.3 INSULATION TESTS
9.4 WIRING AND NECESSARY EQUIPMENT
9.5 TARGET LEDS
9.6 POWER SUPPLY TEST
9.7 COMMUNICATIONS
9.8 RELAY SETTING
9.9 CONTACT INPUTS
9.10 CONTACT OUTPUTS
9.11 RELAY METERING
9.11.1 CURRENT METERING ....................................................................................9-11
9.12 PHASE IOC HIGH SETTING ELEMENT (50P)
9.13 GROUND IOC LOW SETTING ELEMENT (50G)
9.14 PHASE TOC ELEMENT (51P)
9.14.1 IEC INVERSE CURVE .....................................................................................9-14
9.14.2 IEC VERY INVERSE CURVE...........................................................................9-14
9.14.3 IEC EXTREMELY INVERSE CURVE...............................................................9-14
9.14.4 ANSI INVERSE CURVE...................................................................................9-15
9.14.5 ANSI VERY INVERSE CURVE ........................................................................9-15
9.14.6 ANSI EXTREMELY INVERSE CURVE ............................................................9-15
9.14.7 DEFINITE TIME................................................................................................9-15
9.15 GROUND TOC ELEMENT (51G)
9.15.1 IEC INVERSE CURVE .....................................................................................9-16
9.15.2 IEC VERY INVERSE CURVE...........................................................................9-16
9.15.3 IEC EXTREMELY INVERSE CURVE...............................................................9-16
9.15.4 ANSI INVERSE CURVE...................................................................................9-17
9.15.5 ANSI VERY INVERSE CURVE ........................................................................9-17
9.15.6 ANSI EXTREMELY INVERSE CURVE ............................................................9-17
9.15.7 DEFINITE TIME................................................................................................9-17
9.16 THERMAL IMAGE ELEMENT (49)
9.16.1 DIRECT SEQUENCE TEST.............................................................................9-18
9.16.2 INVERSE SEQUENCE TEST...........................................................................9-19
9.16.3 SINGLE-PHASE SIGNAL TEST.......................................................................9-19
9.17 LOCKED ROTOR (48)
9.18 RESTRICTED GROUND DIFFERENTIAL CURRENT (87R)
9.19 UNDERCURRENT UNIT (37)
9.20 NEGATIVE SEQUENCE – UNBALANCE (46)
9.21 MAXIMUM NUMBER OF STARTS AND TIME TO RESTART (66)
9.22 TIME SYNCHRONIZATION
9.23 USER SETTINGS
9.23.1 GENERAL SETTINGS......................................................................................9-27
9.23.2 PHASE / GROUND TOC SETTINGS (51P / 51G)............................................9-27
9.23.3 PHASE / GROUND IOC SETTINGS (50P / 50G).............................................9-28
9.23.4 UNDERCURRENT SETTINGS (37) (MIGII Q).................................................9-28
9.23.5 CURRENT UNBALANCE SETTINGS (46P).....................................................9-28
9.23.6 LOCKED ROTOR (48) (MIGII Q)......................................................................9-28
9.23.7 THERMAL IMAGE SETTINGS (49)..................................................................9-29
9.23.8 MAXIMUM NUMBER OF STARTS (66) (MIGII Q)...........................................9-29
9.23.9 (87R SETTINGS (MIGII P) ...............................................................................9-29
9.24 ADVANCED SETTINGS
9.24.1 GENERAL SETTINGS......................................................................................9-30
9.24.2 PHASE / GROUND TOC SETTINGS (51P / 51G) (TABLE 2)..........................9-30

GEK-113188A MIGII Digital Protection for Electrical Machines V
TABLE OF CONTENTS
9.24.3 PHASE / GROUND IOC SETTINGS (50P / 50G) (TABLE 2) ..........................9-30
9.24.4 UNDERCURRENT SETTINGS (37) (TABLE 2)...............................................9-31
9.24.5 CURRENT UNBALANCE SETTINGS (46P)(TABLE 2)...................................9-31
9.24.6 LOCKED ROTOR (48) (TABLE 2)(MIGII Q)....................................................9-31
9.24.7 THERMAL IMAGE SETTINGS (49) (TABLE 2)(MIGII Q) ................................9-31
9.24.8 MAXIMUM NUMBER OF STARTS (66) (TABLE 2) (MIGII Q).........................9-32
9.24.9 RESTRICTED GROUND DIFFERENTIAL (87R) (TABLE 2) (MIGII P) ...........9-32
9.25 EVENT MASKS
10. INSTALLATION AND
MAINTENANCE 10.1 INSTALLATION
10.2 GROUND CONNECTION AND DISTURBANCES SUPPRESSION
10.3 MAINTENANCE
10.4 CLEANING INSTRUCTIONS
11. MII FAMILY FAQ
(FREQUENTLY ASKED
QUESTIONS)
11.1 MIGII FAQ
12. MIFII DO’S AND DON’TS 12.1 DO’S
12.2 DON’TS
13. TROUBLESHOOTING
GUIDE 13.1 MIGII TROUBLESHOOTING GUIDE
A. THERMAL IMAGE UNIT A.1 INTRODUCTION
A.2 OPERATING PRINCIPLE
A.3 ALGORITHMS
A.4 DIGITAL TECHNOLOGY AND THERMAL IMAGE RELAYS
A.5 THERMAL CURVE
A.6 MIGII THERMAL CURVES
B. TIME-CURRENT CURVES
FOR 51P AND 51N UNITS B.1 IEC/BS142 CURVES
B.2 ANSI CURVES
C. MODBUS C.1 MODBUS FORMAT
C.2 READING VALUES
C.3 COMMAND EXECUTION
C.4 SYNCHRONIZATION
C.5 WRITING SETTINGS

VI MIGII Digital Protection for Electrical Machines GEK-113188A
TABLE OF CONTENTS
C.5.1 FRAME STRUCTURE......................................................................................16-8
C.6 ERRORS
C.7 MODBUS MAP - SETTINGS
C.8 MODBUS MAP- STATUS
D. APPLICATION NOTES D.1 TRIP CIRCUIT SUPERVISION FOR MII-FAMILY RELAYS
D.1.1 SETTINGS AND CONFIGURATION................................................................17-3
E. MODEM CONNECTION E.1 HAYES MODEM
E.2 V.25BIS MODEM
E.3 SAMPLES OF SETTINGS FOR PARTICULAR MODEMS
E.3.1 SPORTSTER FLASH X2 MODEM (HAYES)....................................................18-4
E.3.2 ZOOM PKT14.4................................................................................................18-5
E.3.3 MODEM SATELSA MGD-2400-DHE (V.25BIS)...............................................18-6

GEK-113188A MIGII Digital Protection for Electrical Machines 1-1
1 GETTING STARTED
1
1 GETTING STARTED
To help ensure years of trouble free operation, please read through the following chapter for information to help guide you
through the initial installation procedures of your new relay.
CAUTION: THE OPERATOR OF THIS INSTRUMENT IS ADVISED THAT IF THE EQUIPMENT IS USED IN A MANNER
NOT SPECIFIED IN THIS MANUAL, THE PROTECTION PROVIDED BY THE EQUIPMENT MAY BE IMPAIRED
INSTALLATION MUST BE ACCORDING TO THE NATIONAL ELECTRIC CODE OF THE APPROPRIATE COUNTRY

1-2 MIGII Digital Protection for Electrical Machines GEK-113188A
1.1 INSPECTION CHECKLIST 1 GETTING STARTED
11.1INSPECTION CHECKLIST
Open the relay packaging and inspect the relay for physical damage.
Check the label at the side of the relay and check that the relay model is the same model ordered.
Figure 1–1: RELAY IDENTIFICATION LABEL (A4454P23)
Ensure that the mounting screws have been included with the relay.
For product information, instruction manual updates, and the latest software updates, please visit the GE Multilin Home
Page (www.GEindustrial.com/multilin).

GEK-113188A MIGII Digital Protection for Electrical Machines 1-3
1 GETTING STARTED 1.1 INSPECTION CHECKLIST
1
Note: If there is any physical damage detected on the relay, or any of the contents listed are missing, please
contact GE Multilin immediately at:
EUROPE, MIDDLE EAST AND AFRICA:
GE MULTILIN
Av. Pinoa, 10
48170 Zamudio, Vizcaya (SPAIN)
Tel.: [phone], Fax: [phone]
E-mail: [email protected]
AMERICA, ASIA AND AUSTRALIA:
GE MULTILIN
215, Anderson Avenue
L6E 1B3 Markham, ON (CANADA)
Tel.: [phone], Fax: [phone]
E-mail: [email protected]
The information provided herein does not intend to cover all details of variations of the equipment nor does it take
into account the circumstances that may be present in your installation, operating or maintenance activities.
Should you wish to receive additional information, or for any particular problem that cannot be solved by referring
to the information contained herein, please contact GENERAL ELECTRIC MULTILIN.

1-4 MIGII Digital Protection for Electrical Machines GEK-113188A
1.2 ENERVISTA MII SETUP SOFTWARE 1 GETTING STARTED
11.2ENERVISTA MII SETUP SOFTWARE 1.2.1 SYSTEM REQUIREMENTS
The ENERVISTA MII SETUP software interface is the preferred method to edit settings and view actual values because the
PC monitor can display more information in a simple comprehensible format.
The following minimum requirements must be met for the ENERVISTA MII SETUP software to properly operate on a PC:
• Pentium® class or higher processor (Pentium® II 300 MHz or higher recommended)
• Windows® NT 4.0 (Service Pack 3 or higher), Windows® 2000, Windows® XP
• Internet Explorer® 5.0 or higher
• 64 MB of RAM (128 MB recommended)
• 40 MB of available space on system drive and 40 MB of available space on installation drive
• RS232C serial and Ethernet port for communications to the relay
1.2.2 SAFETY INSTRUCTIONS
The ground screw shown in the following figure must be correctly grounded.
Figure 1–2: GROUNDING SCREW LOCATION
If you want to communicate with the relay using a computer through the front serial port, please ensure that the computer
is grounded to the same ground as the relay.
In case of using a portable computer, it is recommended to not have it connected to its power supply, as in many cases
they are not correctly grounded either due to the power supply itself or to the connector cables used. Powering the
portable PC with its internal battery drastically decreases the possibility of producing permanent damage to the computer
or the relay. Beware of the possibility of losing communication in firmware change processes
This is required not only for personal protection, but also for avoiding a voltage difference between the relay
serial port and the computer port, which could produce permanent damage to the computer or the relay.
GE Multilin will not be responsible for any damage in the relay or connected equipment whenever this elemental
safety rule is not followed.
In case of a firmware flashing process, due to the risk of losing communication, GE Multilin will not be
responsible in case of a communication failure if the relay and PC are not grounded to the same point.
Grounding
screw

GEK-113188A MIGII Digital Protection for Electrical Machines 1-5
1 GETTING STARTED 1.2 ENERVISTA MII SETUP SOFTWARE
1
1.2.3 INSTALLATION
After ensuring the minimum requirements for using EnerVista MII Setup are met (see previous section), use the following
procedure to install the EnerVista MII Setup from the enclosed GE EnerVista CD.
1. Insert the GE EnerVista CD into your CD-ROM drive.
2. Click the Install Now button and follow the installation instructions to install the no-charge EnerVista software.
3. When installation is complete, start the EnerVista Launchpad application.
4. Click the IED Setup section of the Launch Pad window.
Figure 1–3:
5. In the EnerVista Launch Pad window, click the Add Product button and select the relay from the Install Software
window as shown below. Select the “Web” option to ensure the most recent software release, or select “CD” if you do
not have a web connection, then click the Add Now button to list software items for the corresponding relay model.

1-6 MIGII Digital Protection for Electrical Machines GEK-113188A
1.2 ENERVISTA MII SETUP SOFTWARE 1 GETTING STARTED
1
Figure 1–4:
6. If “Web” option is selected, choose from the list the software program related to the specific model and click the
Download Now button to obtain the installation program.
7. When EnerVista detects that there is already a version of the program in the Software Library, you can choose whether
to install it directly or to check for more versions.
.
Figure 1–5:

GEK-113188A MIGII Digital Protection for Electrical Machines 1-7
1 GETTING STARTED 1.2 ENERVISTA MII SETUP SOFTWARE
1
8. If we click the “Check for Updated Versions” button, the program will proceed to search for the different versions of set-
up program from the Web.
Figure 1–6:
9. EnerVista Launchpad will obtain the installation program from the Web. If the version you already have is the last one
on the Web, the following screen will appear
Figure 1–7:
10. If there were more versions on the Web, EnerVista will then show the user the different setup programs available for
upgrade, with their version, size and release date.

1-8 MIGII Digital Protection for Electrical Machines GEK-113188A
1.2 ENERVISTA MII SETUP SOFTWARE 1 GETTING STARTED
111. Double-click the installation program once its download is complete, to install the ENERVISTA MII SETUP software.
12. Select the complete path, including the new directory name, where the ENERVISTA MII SETUP will be installed.
13. Click on Next to begin the installation. The files will be installed in the directory indicated and the installation program
will automatically create icons and add ENERVISTA MII SETUP to the Windows start menu.
14. Follow the on-screen instructions to install the ENERVISTA MII SETUP software. When the Welcome window
appears, click on Next to continue with the installation procedure
Figure 1–8:
15. When the Choose Destination Location window appears, and if the software is not to be located in the default
directory, click Change… and type in the complete path name including the new directory name and click Next to
continue with the installation procedure.
Figure 1–9:

GEK-113188A MIGII Digital Protection for Electrical Machines 1-9
1 GETTING STARTED 1.2 ENERVISTA MII SETUP SOFTWARE
1
16. The default program group where the application will be added to is shown in the Selected Program Folder window.
Click Next to begin the installation process, and all the necessary program files will be copied into the chosen directory.
Figure 1–10:
17. To finish with the installation process, select the desired language for startup
Figure 1–11:

1-10 MIGII Digital Protection for Electrical Machines GEK-113188A
1.2 ENERVISTA MII SETUP SOFTWARE 1 GETTING STARTED
118. Click Finish to end the installation. The MII device will be added to the list of installed IEDs in the EnerVista Launchpad
window, as shown below.
Figure 1–12:

GEK-113188A MIGII Digital Protection for Electrical Machines 1-11
1 GETTING STARTED 1.3 MII RELAY FAMILY HARDWARE
1
1.3MII RELAY FAMILY HARDWARE 1.3.1 MOUNTING & WIRING
Please refer to the HARDWARE chapter for detailed relay mounting and wiring instructions. Review all WARNINGS and
CAUTIONS.
1.3.2 COMMUNICATIONS
The ENERVISTA MII SETUP software can communicate to the relay via the faceplate RS232 port, or the rear panel RS485
port. To communicate with the relay via the RS232 port, a standard “straight through” serial cable is used. The DB9 male
end is connected to the relay and the DB9 or DB25 female end is connected to the PC COM1 or COM2 port as described
in the HARDWARE chapter.
To communicate with the relay’s RS485 port from a computer’s RS232 port, a RS232/RS485 converter box is required. GE
Multilin offers F485, DAC300 and RS232/485 converters. This converter box is connected to the computer using a “straight
through” serial cable. A shielded twisted pair (20, 22 or 24 AWG; 0.25, 0.34 or 0.5 mm2) cable is used to connect the
converter box to the relay rear communication terminals. The converter box (-, +, GND) terminals are connected to the
relay (SDA, SDB, GND) terminals respectively. For long communication cables (longer than 1 km), the RS485 circuit must
be terminated in a RC network (i.e. 120 ohm, 1 nF) as described in the HARDWARE chapter.
1.3.3 FACEPLATE KEYPAD & DISPLAY
Display messages are organized into menus under the main headings: Actual Values, Main Settings, Advanced Settings,
Operations and Change Date&Time. A 5-key keypad and a 16x2 character LCD display (shown below) are used as
elementary local HMI.
Figure 1–13: RELAY KEYPAD AND DISPLAY
Using this keypad it is possible to access all the different menus in the relay and to view and change settings.

1-12 MIGII Digital Protection for Electrical Machines GEK-113188A
1.4 USING THE KEYPAD AND DISPLAY 1 GETTING STARTED
11.4USING THE KEYPAD AND DISPLAY 1.4.1 HIERARCHICAL MENUS
Figure 1–14: MOVING THROUGH THE HIERARCHICAL MENU
As shown in Figure 1–14:, there are 3 hierarchical levels to access the information in the relay. The first level (Main screen)
shows the current value for each phase (Ia, Ib, Ic, Ig)
Pressing the Menu button accesses the second level. To access information within the same hierarchical level (horizontal
movement), push the up/down arrow buttons. To access the third level push the “Enter” button when the desired heading is
shown in the display.
To return back to the previous level (from the third to the second level, or from the second to the first one), push the “ESC/
RESET” button.
Refer to chapter 8, for more information on the use of the local keypad and display to access information and change
settings.