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GENERAL DESCRIPTION AND APPLICATION

GEK-106166E

DFF Digital Feeder Relay

5

1. GENERAL DESCRIPTION AND APPLICATION

New technology has allowed a significant advance in the concept of integration between different components of the
electrical system. The reasons for such integration are several:

•

Reduce the investment in new equipment.

•

Optimize the use of the existing installations.

•

Improve the energy management system.

This integration of functions not only includes the switchgear protection and control devices, but also the monitoring
elements, the alarm signalling equipment (with its associated treatment) and finally the analysis of all the available
information (events, alarms, oscillography, load and demand profiles, etc.).

The DFF is a multi-microprocessor based protection relay used for frequency supervision in an electrical system.

Frequency variations originate from unbalance conditions between generation and load. The main reasons for this
condition are:

•

Inadequate load forecast or deficient generation capacity programming.

•

Busbars, generator group or interconnection feeders trip.

•

System splits into islands.

When the frequency variation is small, the unbalance condition will be corrected by the generator’s regulator. In the
case of big frequency variations, the regulator is not able to correct itself, and the frequency value will decrease with
the danger of losing generation capacity.

If this underfrequency condition is not corrected, then a general blackout may occur.

In case of a shortage of generation capacity, the only possible way of recovering the stability of the system is through
a selective load shedding scheme. The load disconnection is done when the frequency goes down below certain
thresholds in order to provide adequate reaction time for the generators to recover via their speed regulators.

It is important to point out that when the frequency decreases quickly, relays operation based on the detection of
underfrequency condition may not be enough to recover stability. In this case the load shedding scheme must also
take into account the rate of change of frequency. This is done by calculating the frequency derivative over time.
Loads are “shed” based not only on an absolute (static) underfrequency threshold, but also on the dynamic rate of
change of frequency.

The DFF is mainly used in medium voltage and distribution substations as a selective load shedding scheme. By
doing so, frequency recovers stability and potentially dangerous situations that might affect generators in other parts
of the electrical system are avoided.

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Содержание Multilin DFF

Страница 1: ...12 E mail gemultilin ge com Internet www GEMultilin com Copyright 2004 GE Multilin DFF Digital Frequency Relay Instruction manual GEK 106166E GE Multilin Avda Pinoa 10 48170 Zamudio SPAIN Tel 34 94 485 88 00 Fax 34 94 485 88 45 E mail gemultilin euro ge com g GE Consumer Industrial Multilin ...

Страница 2: ...4 2 7 REMOTE COMMUNICATIONS 14 3 SETTINGS 15 4 EQUIPMENT CONFIGURATION 19 4 1 INPUTS CONFIGURATION 22 4 2 OUTPUTS CONFIGURATION 22 4 3 LEDS CONFIGURATION 23 5 TECHNICAL CHARACTERISTICS 25 5 1 MODEL LIST ORDERING CODE 25 5 2 TECHNICAL CHARACTERISTICS 26 6 HARDWARE DESCRIPTION 29 6 1 MECHANICAL CONSTRUCTION 29 6 1 1 CASE CONSTRUCTION 29 6 1 2 ELECTRICAL CONNECTIONS 29 6 1 3 INTERNAL CONSTRUCTION 29 ...

Страница 3: ...AGE CHECK 39 7 13 VOLTAGE FUNCTION CHECKS 40 7 14 FREQUENCY UNITS CHECKS 41 8 INSTALLATION AND MAINTENANCE 43 8 1 RECEPTION OPERATION AND STORAGE 43 8 2 INSTALLATION 43 8 3 GROUND CONNECTION FOR SAFETY AND PERTURBATION REMOVAL 43 8 4 MAINTENANCE 43 9 KEYPAD AND DISPLAY 45 9 1 TREE MENUS 46 9 2 SETTINGS MENU GROUP 47 9 2 1 ENTERING SETTINGS MANUALLY 54 9 3 INFORMATION GROUP 54 9 4 CONTROL OPERATION...

Страница 4: ...for DFF1001 model 57 Fig 3 External connections for DFF1002 model 58 Fig 4 External connections for DFF1003 model 59 Fig 5 External connections for DFF 1012 model 60 Fig 6 External connections for DFF 1011 model 61 Fig 7 Panel mounting for 19 rack models 62 Fig 8 RS232 connection 63 Fig 9 Dimensions diagram for 19 rack models 64 Fig 10 Dimensions diagram for rack models 65 Fig 11 Front view for 19...

Страница 5: ...TABLE OF CONTENTS 4 DFF Digital Feeder Relay GEK 106166E ...

Страница 6: ... will be corrected by the generator s regulator In the case of big frequency variations the regulator is not able to correct itself and the frequency value will decrease with the danger of losing generation capacity If this underfrequency condition is not corrected then a general blackout may occur In case of a shortage of generation capacity the only possible way of recovering the stability of th...

Страница 7: ... Waveform Capture or Frequency Trending d Interfaces and Communications The DFF has three communications ports RS232 on the front panel RS232 on the rear Fiber Optic RS485 option on the rear selected by order code DFF support Software Communication software GE LOCAL and DFFPC view and modify the protection settings alarms internal status measurements etc Configuration software GE INTRO configure t...

Страница 8: ...oes again below the threshold the DFF will continue the count of semi cycles to set from where it was left If the SEMI CYCLES SET count is reached the pickup signal of the unit is activated and the relay starts the count of the time delay set independently for each frequency unit When the time delay expires the trip signal of the unit is activated The SEMICYCLES SET and SEMICYCLES RESET settings a...

Страница 9: ...0 Hz 50 N A NOMINAL VOLTAGE 90 220 Vac 90 1 INHIBIT V 40 110 40 1 SEMICYCLES SET 3 20 3 1 SEMICYCLES RESET 0 4 0 1 PHASE VT RATIO 1 4000 1000 1 GROUND VT RATIO 1 4000 1000 1 SETTINGS FOR EACH INDIVIDUAL FREQUENCY ELEMENT for example 81 N1 Name Limits Default Step FUNCTION TYPE FREQ Or dF dT FREQ N A 81 PICKUP 40 00 70 00 Hz 50 Hz 0 01 Hz TIME DELAY 0 00 60 00 s 1 00 s 0 01 s dF dT 10 00 to 0 10 Hz...

Страница 10: ... voltage transformer SETTINGS FOR EACH INDIVIDUAL FREQUENCY ELEMENT for example 81 N1 The FUNCTION TYPE setting adjusts the operation of the frequency unit as absolute frequency or rate of change of frequency df dt The 81 PICKUP is the pickup value for the unit if it is set as FREQ and for the underfrequency supervision element if it is set as df dt The TIME DELAY is the intentional time delay of ...

Страница 11: ...e undervoltage unit The unit s trip takes place only after this time expires taking into account that the voltage level must be lower than the setting during the course of the time delay The RESET TIME 27P setting is the time that the unit maintains the tripping contacts closed once the trip command has been issued and the undervoltage condition has disappeared Overvoltage units This unit measures...

Страница 12: ...able one bicolor LED red green for the internal alarm function plus 16 red LED s configured as the table shown below LEDs configured for trip indication 9 to 16 include a memory feature and they remain lit until the user presses the TARGET RESET button for 3 seconds The memory feature covers also for lost of Vdc auxiliary power There is a test facility for the LEDs by pressing the TARGET RESET but...

Страница 13: ...ch event stores the following information Date and time 1 msec resolution Type of event Voltage Frequency dF dT measurement Status of all internal digital signals trips pickups inputs outputs etc The events are stored in non volatile EEPROM memory 2 3 2 OSCILLOGRAPHY There are two types of record selectable by the OSCILLO TYPE setting NORMAL or FREQ NORMAL Type The DFF unit can store up to 4 oscil...

Страница 14: ...y can be viewed through GE OSC software or any program that can read COMTRADE files They can also be imported from Microsoft EXCEL 2 4 SETTING TABLES The DFF provides three independent setting tables TABLE 1 TABLE 2 TABLE 3 stored in non volatile EEPROM memory Only one table is active at one time There are some settings that are common for the three setting tables GENERAL SETTINGS ACTIVE TABLE OSC...

Страница 15: ...s ports PORT 1 is accessible at the front of the relay PORTs 2 and 3 are accessed at the rear of the relay There are different models depending on the physical media of connector PORT 2 RS 232 RS 485 or fiber optics See ordering code at section 5 MODEL LIST The connector for PORT1 has priority over connector port2 and is selected once DCD signal Data Carrier Detect is activated See figure 8 for re...

Страница 16: ...he following groups of settings are common to the three tables GENERAL SETTINGS ACTIVE TABLE SETTING OSCILLOGRAPHY MASK FUNCTION PERMIT The settings that can be selected independently for each table are 27P Undervoltage unit 59P Overvoltage unit 81N1 Underfrequency unit or dF dT 81 N2 Underfrequency unit or dF dT 81N3 Underfrequency unit or dF dT 81N4 Underfrequency unit or dF dT 81N5 Underfrequen...

Страница 17: ...led Disabled Disabled N A 59P FUNCTION To enable 59P Enabled Disabled Disabled N A 81N1 FUNCTION To enable 81N1 Enabled Disabled Disabled N A 81N2 FUNCTION To enable 81N2 Enabled Disabled Disabled N A 81N3 FUNCTION To enable 81N3 Enabled Disabled Disabled N A 81N4 FUNCTION To enable 81N4 Enabled Disabled Disabled N A 81N5 FUNCTION To enable 81N5 Enabled Disabled Disabled N A 81N6 FUNCTION To enabl...

Страница 18: ...YES N A 81N1 TRIP 81N1 TRIP triggers oscillography YES NO YES N A 81N2 TRIP 81N2 TRIP triggers oscillography YES NO YES N A 81N3 TRIP 81N3 TRIP triggers oscillography YES NO YES N A 81N4 TRIP 81N4 TRIP triggers oscillography YES NO YES N A 81N5 TRIP 81N5 TRIP triggers oscillography YES NO YES N A 81N6 TRIP 81N6 TRIP triggers oscillography YES NO YES N A 81N7 TRIP 81N7 TRIP triggers oscillography Y...

Страница 19: ...ERVOLTAGE 59P PICKUP 59P Pickup 50 to 220 Vac 80 1 Vac TIME DELAY 59P Operating time 0 to 30 s 5 0 01 s RESET TIME 59P Reset time after fault disappears 0 30 s 0 0 01 s 81NX FUNCTIONS FREQUENCY FUNCTION TYPE Type Freq or Rate of change FREQ dF dT FREQ N A 81 PICKUP 81 Pickup 40 to 70 Hz 50 Hz 0 01 Hz TIME DELAY Operating time 0 to 60 s 1 00 s 0 01 s DF DT Rate of Change 0 1 to 10 Hz s 1 Hz s 0 01 ...

Страница 20: ...of logical Boolean states of all the internal variables available inside the relay Each variable may be a 0 or a 1 As an example one internal state is the pickup of a frequency unit If this unit operates as underfrequency its internal state will be 1 This value can be configured to close an output contact or lit an LED In the same way if one digital input is activated its internal state goes to 1 ...

Страница 21: ...Out of order 139 20 Input 10 60 100 Default general settings 140 21 Input 9 61 101 Table 1 default settings 141 22 Input 8 62 102 Table 2 default settings 142 23 63 103 Table 3 default settings 143 24 Input 7 64 Output 1 104 Trip contact 144 AND1 25 Input 6 65 Output 2 105 Table 1 active 145 AND2 26 Input 5 66 Output 3 106 Table 2 active 146 AND3 27 Input 4 67 Output 4 107 Table 3 active 147 AND4 ...

Страница 22: ...on link 44 64 LED 1 5 25 Control link 45 65 LED 2 6 26 46 66 LED 3 7 27 47 67 LED 4 8 28 48 68 LED 5 9 29 49 69 LED 6 10 30 50 70 LED 7 11 31 51 71 LED 8 12 32 New events 52 72 LED 9 13 33 53 73 LED 10 14 34 54 74 LED 11 15 35 55 75 LED 12 16 Time date alarm 36 56 76 LED 13 17 37 57 77 LED 14 18 Serial EEPROM alarm 38 58 78 LED 15 19 System Settings 39 59 79 LED 16 The configuration of the DFF pro...

Страница 23: ...n of all voltage units Complete protection trip block Level This input is active while there is Vdc applied to the input It is used to block the operation of all protection units 4 2 OUTPUTS CONFIGURATION The DFF protection system provides 28 20 or 8 user configurable outputs depending on the model plus five non programmable factory configured ones These outputs are referred as SP1 SP2 etc Any of ...

Страница 24: ...ain lit even in the case the condition that activated it disappears In order to configure an LED it is necessary to first configure one internal state to a protection or communication event Once this is done the LED must be configured to be driven by that protection or communication event To program LED number 12 to be lit when the undervoltage function trips the following procedure should be foll...

Страница 25: ...EQUIPMENT CONFIGURATION 24 DFF Digital Feeder Relay GEK 106166E ...

Страница 26: ...rack Inputs Outputs 7 0 14 inputs 33 outputs not available for rack model 1 7 inputs 25 outputs 2 7 inputs 13 outputs 3 14 inputs 20 outputs not available for rack model Communications Rear Ports 8 P2 RS232 1 P2 1mm Plastic FO P3 RS232 2 P2 62 5 125 glass FO P3 RS232 3 P2 RS485 P3 RS232 Digital Inputs Nominal voltage 10 0 48 125 Vdc 1 110 250 Vdc Power Supply 11 G 48 125 Vdc H 110 250 Vdc 15 A Rev...

Страница 27: ...M according to MIL C3098F Hysteresis 0 04 Hz When a stable frequency generator is used For instance the EPOCH20 in 50 or 60 Hz mode ELECTRICAL CHARACTERISTICS Frequency 50 or 60 Hz Nominal Voltage 90 220 Vac phase phase Power Supply 48 125 Vdc or 100 250 Vdc 20 see ordering code model list Digital Inputs nominal voltage 48 125 110 220 Vdc see ordering code model list AC Voltage inputs Un 220 3 Con...

Страница 28: ...cluding also GE dielectric strength test and the European directive of Electromagnetic Compatibility 89 336 for CE marking It also fulfills low voltage European directives and standards ANSI C37 90 IEC 255 5 IEC 255 6 e IEC 68 Test Standard Class Dielectric Strength Insulation IEC 255 5 2kV 50 60 Hz 1 minute Impulse voltage withstand IEC 255 5 5 kV 0 5 J 1 MHz Interference test IEC 255 22 1 III El...

Страница 29: ...TECHNICAL CHARACTERISTICS 28 DFF Digital Feeder Relay GEK 106166E ...

Страница 30: ...ential not only in terms of safety but also for behavior against electromagnetic interference All the modules can be withdrawn enabling easy maintenance and repair The DFF has a polycarbonate front cover This keeps the relay sealed providing protection against dust and water IP51 index according IEC 529 The use of a push button allows access to the main functions without the need for removing the ...

Страница 31: ... the front of the communications CPU Front keypad board This board supports the 20 key keypad and has a transparent window for the LCD display The group formed by both front boards is mechanically fixed to the case by 4 captive screws Accessing internal modules 1 Remove the plastic cover 2 Undo the 4 captive front screws located in the 4 corners 3 Lower the front plate carefully until the 40 way f...

Страница 32: ...dentified by the and sign For relays with fiber optics communications plastic or crystal transmission and reception connectors terminals are identified by TX and RX respectively 6 1 5 MAGNETIC MODULE The magnetic module connects the substation voltage signals to the relay providing galvanic isolation by means of internal transformers and reduces the voltage levels for the internal circuitry As the...

Страница 33: ...h the levels of the optocoupler The optocoupler gives galvanic isolation to each input and greatly enhances the performance against electromagnetic perturbations 6 1 9 OUTPUT MODULE Each module has 12 heavy duty relays with duties as listed in section 5 2 The alarm relay has one normally closed contact All of the relays have one normally open contact each The contacts are potential free 6 1 10 POW...

Страница 34: ...ightened and the terminal blocks are not damaged Make sure that the device model number shown on the front plate matches with the ordered model 7 2 CONNECTION AND NECESSARY EQUIPMENT Equipment needed 1 Vdc power supply 1 Vac voltage source 1 multimeter Connect the relay as shown in the external connection diagram Power supply must be connected to D11 Positive and C11 Negative terminals at rated va...

Страница 35: ...y G4 E1 E4 F1 F4 Inputs G5 E5 12 F5 12 Outputs G6 J1 12 K1 12 Outputs G7 R1 4 I1 4 Inputs G8 R5 12 I5 12 Outputs MODEL DFF1x01 GROUP RELAY TERMINALS TYPE G1 A7 A10 B7 B10 Voltage G2 C5 C9 D5 D9 Trips G3 C11 D11 Power Supply G4 E1 E4 F1 F4 Inputs G5 E5 12 F5 12 Outputs G6 J1 12 K1 12 Outputs MODEL DFF1x02 GROUP RELAY TERMINALS TYPE G1 A7 A10 B7 B10 Voltage G2 C5 C9 D5 D9 Trips G3 C11 D11 Power Supp...

Страница 36: ... SERVICE there is no protection unit enabled to trip At least one protection unit must be enabled and its trip permitted To perform this test first set the relay to IN SERVice under the GENERAL SETTINGS STATUS menu and enable at least one function permitting its operation under FUNCTION PERMIT menu and its trip permission under the same menu 7 5 VOLTAGE MEASUREMENT Set the VT ratios to the followi...

Страница 37: ... being tested 7 8 OUTPUT CHECKS 1 Trip Output checks Enable all the protection functions Enable the trips Force the operation of one underfrequency function injecting a voltage at a frequency below the set value Check if trip contacts TRIP1 TRIP2 TRIP3 TRIP4 are closed while the trip condition is present and reset when this condition disappears 2 Alarm Output checks Switch off the Vdc power supply...

Страница 38: ...ange the configuration of inputs and outputs 7 9 COMMUNICATIONS PORTS CHECKS Connect the relay to the PC using a communication cable Communication cable configuration is shown in the list of figures at the end of this manual Use this cable configuration or use a standard direct RS232 cable no crossings and a standard Null Modem adaptor Set in DFF relay and in the PC the following communication par...

Страница 39: ...eys and verify that the following messages are displayed Start from the main screen KEYS LCD MESSAGES SET VIEW PROTECTION SETTINGS CLR DFF GENERAL ELECTRIC INF STATUS ENT MODEL DATA BASE MODEL CLR STATUS CLR DFF GENERAL ELECTRIC ACT SET DATE TIME CLR DFF GENERAL ELECTRIC 7169 REAR PORT BAUD RATE REAR PORT STOP BITS Clear the display by pressing the CLR key DFF GENERAL ELECTRIC ...

Страница 40: ...ng is phase to phase voltage Injected voltages are phase to ground Set the relay NOMINAL FREQUENCY to nominal frequency 50 or 60 Hz Set one frequency unit as absolute threshold and set the operating value to 110 of nominal frequency Set nominal voltage to 90 Vac NOMINAL VOLTAGE setting is phase to phase voltage Set inhibition voltage to 40 0 4x90V 36Vph ph 20 8Vph gnd Provide a 10Vac voltage signa...

Страница 41: ...ICKUP to 65 Vac Decrease the voltage and check that the relay trips with 63 05 Vac and drops out with 70 2 Vac Modify the 27P PICKUP to 110 Vac Decrease the voltage and check that the relay trips with 106 7 Vac and drops out with 118 8 Vac 2 59P OVERVOLTAGE FUNCTION CHECKS Set 59P function as follows 59P PICKUP 50 Vac TIME DELAY 59P 0 s RESET TIME 59P 0 s Increase the voltage and check that the re...

Страница 42: ...or margin not higher than 0 01 Hz 2 Rate of change of Frequency checking Configure the frequency units as df dt with the following settings Unit 1 0 1 Hz s Unit 2 0 2 Hz s Unit 3 0 5 Hz s Unit 4 1 Hz s Unit 5 1 5 Hz s Unit 6 2 Hz s Unit 7 5 Hz s Unit 8 10 Hz s Set all units to the same frequency supervision level Test each Frequency Unit simulating frequency variations decreasing ramps with rates ...

Страница 43: ...ACCEPTANCE TESTS 42 DFF Digital Feeder Relay GEK 106166E ...

Страница 44: ...nd in order to get a right operation of the perturbation removal filters included in the system For securing the maximum protection this connection must be as short as possible preferably 25 cm or less In this way the capacitors internally connected between outputs and ground deflect the high frequency perturbations directly to ground without crossing the electronic circuits so that these circuits...

Страница 45: ...KEYPAD AND DISPLAY 44 DFF Digital Feeder Relay GEK 106166E ...

Страница 46: ... this menu press the following sequence of key strokes 7 1 6 9 ASCII codes for G E 71 69 In order to be able to access this menu the relay must be in the main screen Single Key Menu The DFF relay allows a simplified operating mode by pressing the ENT key It is not necessary to remove the front cover to access to this mode In the standby mode the following message is displayed Here one of the last ...

Страница 47: ...ltage value kV Vc Primary side phase C voltage value kV Vn Primary side ground voltage value kV Frequency Frequency value dF dT rate of change of Frequency value PROTECTION STATUS Protection in or out of service ACTIVE TABLE Active settings table DATE TIME Date and time 7169 NETWORK BAUD RATE Rear port communications baud rate NETWORK STOP BITS Rear port stop bits LOCAL PORT BAUD RATE Front port c...

Страница 48: ...enu group allows the user to view and modify the DFF s settings To access this group the SET key must be pressed when the DFF is in the standby mode showing DFF GENERAL ELECTRIC The following message will be displayed Pressing either the keys the following message will be displayed DFF settings menu tree is represented in the following table It is important to remember that in order to go into the...

Страница 49: ...Level 3 VIEW PROTECTION SETTINGS GENERAL SETTINGS CLR ENT RELAY STATUS key key key key CHANGE PROTECT SETTINGS CLR ENT FREQUENCY key key NOMINAL VOLTAGE key key key key INHIBIT V key key SEMI CYCLES SET key key SEMICYCLES RESET 7 key key PHASE VT RATIO key key GROUND VT RATIO ...

Страница 50: ...BLE key key OSCILLOGRAPHY MASK CLR ENT OSCILLOS TYPE key key PREFAULT CYCLES key key 81N1 PICKUP key key 81N2 PICKUP key key key key 81N8 PICKUP key key 81N1 TRIP key key 81N2 TRIP key key key key 81N8 TRIP key key 27P PICKUP key key 59P PICKUP key key EXTERNAL TRIGGER key key COMM TRIGGER key key 27P TRIP key key 59P TRIP ...

Страница 51: ...166E Level 1 Level 2 Level 3 FUNCTION PERMIT CLR ENT 27P FUNCTION key key 59P FUNCTION key key 81N1 FUNCTION key key 81N2 FUNCTION key key key key 81N8 FUNCTION key key 27P TRIP key key 59P TRIP key key 81N1 TRIP key key 81N2 TRIP key key key key 81N8 TRIP ...

Страница 52: ...CTION T1 CLR ENT 27P PICKUP T1 Table 1 key key TIME DELAY 27P key key key key RESET TIME 27P 27P FUNCTION T2 CLR ENT 27P PICKUP T2 Table 2 key key TIME DELAY 27P key key key key RESET TIME 27P 27P FUNCTION T3 CLR ENT 27P PICKUP T3 Table 3 key key TIME DELAY 27P key key key key RESET TIME 27P ...

Страница 53: ...CTION T1 CLR ENT 59P PICKUP T1 Table 1 key key TIME DELAY 59P key key key key RESET TIME 59P 59P FUNCTION T2 CLR ENT 59P PICKUP T2 Table 2 key key TIME DELAY 59P key key key key RESET TIME 59P 59P FUNCTION T3 CLR ENT 59P PICKUP T3 Table 3 key key TIME DELAY 59P key key key key RESET TIME 59P ...

Страница 54: ... key key key key DF Dt key key RESET TIME 81N1 FUNCTION T2 CLR ENT FUNCTION TYPE T2 Table 2 key key 81 PICKUP key key TIME DELAY key key key key DF Dt key key RESET TIME 81N1 FUNCTION T3 CLR ENT FUNCTION TYPE T3 Table 3 key key 81 PICKUP key key TIME DELAY key key DF Dt key key RESET TIME THESE SCREENS ARE REPEATED 8 TIMES TO COVER THE 8 FREQUENCY UNITS INCLUDED IN DFF ...

Страница 55: ... displayed 7 To confirm the change press 1 Y key Otherwise press 3 N key 8 Now the following message will be displayed 9 Press the CLR key repeatedly in order to return to the standby mode If during the settings modification any range limit is exceeded the relay will not accept the change and the following message will be displayed Some settings do not require to enter a value through the keypad T...

Страница 56: ...3 PICKUP Underfrequency unit 3 pickup F4 PICKUP Underfrequency unit 4 pickup F5 PICKUP Underfrequency unit 5 pickup F6 PICKUP Underfrequency unit 6 pickup F7 PICKUP Underfrequency unit 7 pickup F8 PICKUP Underfrequency unit 8 pickup 27 PICKUP Undervoltage unit pickup 59 PICKUP Overvoltage unit pickup PROTECTION STATUS Protection in service out of service ACTIVE TABLE Active table number 1 3 LOCAL ...

Страница 57: ...standby screen These are the available control operations Set date and time Communications trigger To change date and time the following steps must be followed NOTE To modify the numeric value that is displayed press CLR key to delete it The execution of the OSCILLOGRAPHY TRIGGER order causes the start of the oscillography register DFF GENERAL ELECTRIC SET DATE TIME YEAR 98 MONTH 09 DAY 02 HOUR 10...

Страница 58: ...es If the code is correct the LCD will show the configuration menu if not the relay will return to the standby screen The code is common to all DFF relays It is not meant to be a password but a simple measure of security to avoid accidental manipulation of the configuration The code is 7 1 6 9 which was selected because it is the corresponding ASCII code for the initials GE G 71 E 69 This is the s...

Страница 59: ...255 PASSWORD The relay provides a password in order to prevent unauthorized personnel from communicating remotely with the relay through the use of GE_LOCAL or DFFPC communications software The password may only be viewed through the relay display and it consists of a number between 0 and 99999 The introduced password through GE_LOCAL or DFFPC must be identical to the relay password in order to pe...

Страница 60: ...FIGURES GEK 106166E DFF Digital Feeder Relay 59 10 FIGURES ...

Страница 61: ...FIGURES 60 DFF Digital Feeder Relay GEK 106166E Figure 1 External Connections for DFF1000 model ...

Страница 62: ...FIGURES GEK 106166E DFF Digital Feeder Relay 61 Figure 2 External Connections for DFF1001 model ...

Страница 63: ...FIGURES 62 DFF Digital Feeder Relay GEK 106166E Figure 3 External Connections for DFF1002 model ...

Страница 64: ...FIGURES GEK 106166E DFF Digital Feeder Relay 63 Figure 4 External Connections for DFF1003 model ...

Страница 65: ...FIGURES 64 DFF Digital Feeder Relay GEK 106166E Figure 5 External Connections for DFF 1012 model ...

Страница 66: ...FIGURES GEK 106166E DFF Digital Feeder Relay 65 Figure 6 External Connections for DFF 1011 model ...

Страница 67: ...FIGURES 66 DFF Digital Feeder Relay GEK 106166E Figure 7 Panel Mounting for 19 rack models ...

Страница 68: ... cable no crossing OT DB 9 MALE DO NOT CONNECT THE SHIELD NOTE DB 9 MALE Relay to computer connection standard null modem It is recommended to use a direct cable with an standard Null Modem connector at one end DB 9 FEMALE DB 9 MALE DO NOT CONNECT THE SHIELD NOTE Figure 8 RS 232 Connection ...

Страница 69: ...FIGURES 68 DFF Digital Feeder Relay GEK 106166E Figure 9 Dimensions diagram for 19 rack models ...

Страница 70: ...FIGURES GEK 106166E DFF Digital Feeder Relay 69 Figure 10 Dimensions Diagram for rack models ...

Страница 71: ...FIGURES 70 DFF Digital Feeder Relay GEK 106166E Figure 11 Front View for 19 rack models ...

Страница 72: ...FIGURES GEK 106166E DFF Digital Feeder Relay 71 Figure 12 Rear View for 19 rack model ...

Страница 73: ...FIGURES 72 DFF Digital Feeder Relay GEK 106166E Figure 13 Front View for rack models B2213F3 ...

Страница 74: ...FIGURES GEK 106166E DFF Digital Feeder Relay 73 Figure 14 Rear View for rack models B2213F2 ...

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