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5. HARDWARE DESCRIPTION

28

DBF Breaker Failure Protection

GEK-106168E

5.2.3 POWER SUPPLY

The DBF power supply can be 48-125 VDC or 110-250 VDC rated. The operating margin of the power supply is +
20%, and is galvanically isolated from the rest of the relay's circuits. The power supply provides

±

12 VDC to the

analog circuitry and the output relays, and

±

5 VDC for the digital circuits.

5.2.4 KEYBOARD AND DISPLAY

The DBF display at the front of the relay is liquid crystal type and consists of two rows of 16 characters each. The
display has background light with variable lightness adjustable by a potentiometer located on the rear of the front
cover plate.

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Содержание K 106168E

Страница 1: ...tions Instructions Instructions Instructions GEK 106168E GEK 106168E GEK 106168E GEK 106168E Digital Breaker Failure Protection Digital Breaker Failure Protection Digital Breaker Failure Protection Di...

Страница 2: ...28 9 1 200 17 21 7 217 176 2 7 35 6 17 0 18 1 86 23 2 7 6 3 72 7 5 7 23 2 7 3 5 28 9 281 7 352 0 72 7 180 5 1 1 7 48 67 21 5 2 33 72 62 9 285 28 76 1 7 1 28 25 3 1 86 03529 7 6 0 18 RPSDQ 1DPH GGUHVV...

Страница 3: ......

Страница 4: ...ts and Outputs 13 2 5 MAN MACHINE INTERFACE HMI 15 2 6 REMOTE COMMUNICATIONS 16 3 SETTINGS 17 4 TECHNICAL CHARACTERISTICS 21 4 1 MODEL LIST 21 4 1 1 Special Models 21 4 2 TECHNICAL CHARACTERISTICS 22...

Страница 5: ...nt 37 6 10 2 Timing Measurement 37 7 INSTALLATION AND MAINTENANCE 39 7 1 INSTALLATION 39 7 2 CONNECTION TO GROUND AND DISTURBANCES SUPPRESSION 39 7 3 MAINTENANCE 39 8 KEYBOARD AND DISPLAY 41 8 1 MENU...

Страница 6: ...c 189C4114 Sheet 2 Figure 2 External Connections 189C4114 Sheet 1 Figure 3 Front View 226B7412 Sheet 9 Figure 4 Rear View 226B7412 Sheet 10 Figure 5 Dimensions Diagram 226B6086 sheet 10 Figure 6 Panel...

Страница 7: ...LIST OF FIGURES iv DBF Breaker Failure Protection GEK 106168E...

Страница 8: ...the relay The system provides the following functions a Protection Low current level breaker failure protection following a single or three phases initiation with up to two time delayed steps High cur...

Страница 9: ...cated on the rear Human machine interface HMI consisting of 20 keys keypad and alphanumerical LCD 16 characters x 2 lines Windows based GE INTRO configuration software for inputs outputs LEDs configur...

Страница 10: ...ng on settings one or two time delayed tripping steps Use 50BF_1P setting permitted Not permitted and number of output stages N of Output Stages setting to enable this function and to set the number o...

Страница 11: ...d some amount of current is present in any phase There are two settings available for this function Internal Arc Pickup to set the current threshold and Internal Arc Timer to coordinate the operation...

Страница 12: ...and to blink or to be steady The internal events must be previously defined using the internal signals of the relay It is possible to use AND OR and NOT logic gates to define these events The availabl...

Страница 13: ...t detector ph B 3 9 Lo Set C Pickup Output of Lo Set current detector ph C 3 10 50BF 3 Phase Initiate CC7 Dig Input ON default configuration 3 11 50BF Neutral Initiate Output of Neutral current detect...

Страница 14: ...umulated I2t above limit for Phase A 6 12 52 B Maintenance Alarm Accumulated I2t above limit for Phase B 6 13 52 C Maintenance Alarm Accumulated I2t above limit for Phase C 6 14 6 15 7 0 7 1 Active Ta...

Страница 15: ...ternal AND gate 10 10 10 AND11 Output of internal AND gate 11 10 11 AND12 Output of internal AND gate 12 10 12 AND13 Output of internal AND gate 13 10 13 AND14 Output of internal AND gate 14 10 14 AND...

Страница 16: ...INT TIME Otherwise the unit measures the time between the tripping signal of the main feeder protection and the change of the status contacts of the circuit breaker 52 b The total Breaking Current Lim...

Страница 17: ...ECORDER The DBF system keeps a record of the last 144 events and stores for each one the following information date and time accurate to one millisecond the type of event current RMS values during the...

Страница 18: ...INIT LO SET A PICKUP LO SET B PICKUP LO SET C PICKUP 3 POLE 50BF INIT NEUTRAL PICKUP ARC A PICKUP ARC B PICKUP ARC C PICKUP The oscillography records are retrieved from the relay to the computer in C...

Страница 19: ...e settings table that is active at a given moment The active settings table can be changed by means of up to 2 digital inputs referred to as ACTIVE TABLE SELECT 0 and ACTIVE TABLE SELECT 1 which allow...

Страница 20: ...sed it has priority over time setting by communications since the time read by IRIG B is much more accurate 2 4 3 CONFIGURABLE INPUTS AND OUTPUTS 2 4 3 1 Digital Inputs The DBF system has 6 digital in...

Страница 21: ...pick ups trips alarms etc The DBF has 66 different internal states and these can be used to carry out logical operations NOT AND and OR which gives the unit a great flexibility The output configurati...

Страница 22: ...characters per line This display has highly reliable LED diode back lighting the screen brightness can be adjusted on the rear of the front board By means of this interface the user can change the set...

Страница 23: ...and ModBus RTU The protocol is highly reliable and allows communication with different protection systems It guarantees very efficient data transfer especially for the oscillography and other large f...

Страница 24: ...ED On the relay depending on whether communication is through PORT 1 or PORT 2 means LOCAL or PORT 3 means NET STOP BIT Stop bit corresponding to each one of the communication ways LOCAL or NET To mod...

Страница 25: ...Disable Enable Lo Set C Pickup Enable Disable Enable 3P 50BF Init Enable Disable Enable Neutral Pickup Enable Disable Enable Arc A Pickup Enable Disable Enable Arc B Pickup Enable Disable Enable Arc...

Страница 26: ...t Integration Time In this case the time used will be always the set time should be the rated operating time of the circuit breaker provided by the manufacturer 4 The Pre Fault Cycles to be shown in e...

Страница 27: ...3 SETTINGS 20 DBF Breaker Failure Protection GEK 106168E...

Страница 28: ...Special Models 15 A Revision TABLE 1R RANGES MODELS A B C D E F G DBF PHASE 1 12 A 0 2 2 4 A 1 12A 1 12 A 1 12 A 0 5 6 A 0 5 6 A GROUND 1 12 A 0 2 2 4 A 0 2 2 4 A 0 5 6 A 0 1 1 2 A 0 2 2 4 A 0 1 1 2 A...

Страница 29: ...VDC according to selected model For special models please refer to section 4 1 1 Thermal Capacity Current circuits Permanent 4 x In 3s duration 50 x In 1 s duration 100 x In Temperature ranges Operat...

Страница 30: ...ommunity Directive 89 336 for the EC market in line with European standards It also complies with the European directive requirements for low voltage and the environmental and operating requirements e...

Страница 31: ...4 TECHNICAL CHARACTERISTICS 24 DBF Breaker Failure Protection GEK 106168E...

Страница 32: ...B 9 serial connectors one on the front and two on the rear when using communication option RS 232 One of these connectors is replaced by the corresponding fiber optic connector in models including thi...

Страница 33: ...68E The communications connectors are situated on left hand side of the front and on the right hand side of the rear of the case The front port is PORT 1 and the rear ports are PORT 2 and PORT3 The IR...

Страница 34: ...he analogue digital converter converts the voltage inputs into their digital equivalent with a resolution of 10 bits The unit code is stored in non volatile EPROM memory while the settings and events...

Страница 35: ...from the rest of the relay s circuits The power supply provides 12 VDC to the analog circuitry and the output relays and 5 VDC for the digital circuits 5 2 4 KEYBOARD AND DISPLAY The DBF display at t...

Страница 36: ...age due to transport and handling Check that all the screws are tight and the terminal blocks have not been damaged in any way 6 3 PANEL INSULATION TESTS If any insulation test would be performed on t...

Страница 37: ...ASE Severe Fault 3P Per Low Load 2P No Per N Output Stages 1 2 nd Stage Timer 2s Internal Arc Settings Table 1 Value Int Arc Pickup 1A Int Arc Timer 1s The specific settings required for each test are...

Страница 38: ...o check the communication ports of the relay PORT1 PORT2 and PORT3 To do this it is necessary to use a computer and the communications software GE_LOCAL Figure 7 shows the series cable and connection...

Страница 39: ...status windows turn red while the applied voltage remains present If the relay has the optional expansion board check the same for the following contact converter inputs E7 and E8 CC7 F7 and E8 CC8 E...

Страница 40: ...d A12 B12 C4 D4 C5 D5 In case the relay under test includes an expansion board check also the operation of the following contacts E1 F1 E2 F2 E3 F3 9 Check that after 2nd Stage Timer delay 2s the foll...

Страница 41: ...phase C 8 Energize digital input CC7 3 POLE BF INITIATE if the relay has not an expansion board energize digital inputs CC1 PHASE A BF INITIATE and CC2 PHASE B BF INITIATE simultaneously 9 Check that...

Страница 42: ...GS 3P NO I TIMER T3 to 1s 6 Change setpoint TABLE 1 50BF SETTINGS LOW LOAD 2P to PER 7 Energize digital input CC7 3P BF INITIATE If the relay has not an expansion board energize CC1 PHASE A BF INITIAT...

Страница 43: ...106168E 8 Check that after 3P NO I TIMER T3 2s the following contacts are closed A12 B12 C1 D1 C4 D4 C6 D6 C5 D5 C7 D7 9 If the relay is provided with an expansion board check that also the following...

Страница 44: ...rease current applied on A1 A2 phase A until contact A12 B12 closes Check that the operating value of the current is within 5 of setpoint 5A for relays with 5A nominal current and 1A for 1A nominal cu...

Страница 45: ...6 ACCEPTANCE TESTS 38 DBF Breaker Failure Protection GEK 106168E...

Страница 46: ...ectronic circuits Then the internal circuitry is perfectly protected In addition this connection also guarantees the physical safety of the personnel when handling the relay since the whole casing is...

Страница 47: ...7 INSTALLATION AND MAINTENANCE 40 DBF Breaker Failure Protection GEK 106168E...

Страница 48: ...accessed by keying in the code 7169 In order to access this mode the relay should be on the main screen Single key menu By pressing the ENT key the DBF can be operated in a simplified mode It is not...

Страница 49: ...In In current in primary Amps I 2 t A COUNTER Accumulated kA 2 sec for phase A N OPENINGS Accumulated number opens 3 2 Phase Logic Shows logic for 50BF High Set 50BF Pickup Shows status of 50BF Relay...

Страница 50: ...4000 GENERAL SETTINGS GROUND CT RATIO 1 4000 BREAKER NUMBER 4 digits KI2t OP MODE Fixed Measuring KI2t INT TIME 0 03 0 25 s BREAKER SETTINGS KI2t LIMIT 1 999999 kA2s ACTIVE TABLE SET ACTIVE TABLE 1 3...

Страница 51: ...MER 0 1 2 0 s INTERNAL ARC SET T2 Same than for TABLE 1 INTERNAL ARC SET T 3 Same than for TABLE 2 To change any setting the procedure is as follows Press the SET key Select the option MODIFY SETTINGS...

Страница 52: ...ettings do not accepts numeric values instead of that different possibilities will be shown by pressing left right arrow keys To perform MODIFY OF PROTECTION COUNTERS the available menus are Level 1 L...

Страница 53: ...of phase A Openings Number of phase B Openings Number of phase C Openings Type of Logic 2P 3P High set Pickup Status A High set Pickup Status B High set Pickup Status C Low set Pickup Status A Low set...

Страница 54: ...ows to set the date and time by entering the year month day hour minutes and seconds in this sequence After each setting the ENT key must be pressed If instead of pressing the ENT key when the SET DAT...

Страница 55: ...e key menu will be accessed Then the information displayed while step by step pressing ENT key is Phase A Current Neutral Current I 2 t Phase A Counter Number of phase A Openings Type of BF Logic 50BF...

Страница 56: ...lected by means of the logic key 1 Y for 1 and 3 N for 2 LOC BAUDRATE as above but for local communications LOC STOP BITS As above but for local communications LOCAL SETTINGS Settings changes by local...

Страница 57: ...8 KEYBOARD AND DISPLAY 50 DBF Breaker Failure Protection GEK 106168E...

Страница 58: ...FIGURES GEK 106168E DBF Breaker Failure Protection 51 FIGURES FIGURES FIGURES FIGURES...

Страница 59: ...FIGURES 52 DBF Breaker Failure Protection GEK 106168E FIGURE 1 BREAKER FAILURE LOGIC 189C4114 SHEET 2...

Страница 60: ...FIGURES GEK 106168E DBF Breaker Failure Protection 53 FIGURE 2 EXTERNAL CONNECTIONS 189C4114 SHEET 1...

Страница 61: ...FIGURES 54 DBF Breaker Failure Protection GEK 106168E FIGURE 3 FRONT VIEW 226B7412 H9...

Страница 62: ...FIGURES GEK 106168E DBF Breaker Failure Protection 55 FIGURE 4 REAR VIEW 226B7412H10...

Страница 63: ...FIGURES 56 DBF Breaker Failure Protection GEK 106168E FIGURE 5 DIMENSIONS DIAGRAM 226B6086H10...

Страница 64: ...FIGURES GEK 106168E DBF Breaker Failure Protection 57 FIGURE 6 PANEL DRILLING 226B6086H10...

Страница 65: ...CONNECTION DBF RELAY TO PC FIGURE 8 RS232 CONNECTION DBF RELAY TO MODEM DB 9 Male Connector Label DB 9 Female Connector DBF NOTE Leave shield unconnected at both ends 1 1 DB 9 Male Connector DB 9 Mal...

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