ÿ GE Power Management Digital Breaker Failure Protection DBF Instructions GEK 106168E
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TABLE OF CONTENTS TABLE OF CONTENTS 1. GENERAL DESCRIPTION AND APPLICATION........................................................................................... 1 1.1. GENERAL DESCRIPTION ................................................................................................................................. 1 2. OPERATION LOGIC ...................................................................................................................................... 3 2.1.
TABLE OF CONTENTS 6.9.5 Neutral Overcurrent Unit Test..................................................................................................................... 35 6.10. RELAY MEASUREMENT TESTS........................................................................................................................... 37 6.10.1. Current Measurement.............................................................................................................................. 37 6.10.2.
LIST OF FIGURES LIST OF FIGURES Figure 1. Breaker Failure Logic (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 drilling (226B6086H10) Figure 7. RS232 Connection (DBF relay to PC) Figure 8.
LIST OF FIGURES iv DBF Breaker Failure Protection GEK-106168E
1. GENERAL DESCRIPTION AND APPLICATION 1. GENERAL DESCRIPTION AND APPLICATION 1.1. GENERAL DESCRIPTION The DBF system is a microprocessor based breaker failure protection, control and measurement unit that has different algorithms to allow its use on a wide range of applications in power systems.
1. GENERAL DESCRIPTION AND APPLICATION e) Communication Interfaces • • • 2 Remote communications through three communication ports, one on the front of the relay and two located 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 configuration) and GE-LOCAL communications software (for relay monitoring, settings change, stored data retrieve, etc).
2. OPERATION LOGIC 2. OPERATION LOGIC (See figure 1 at the end of the Instruction Manual) 2.1. PROTECTION FUNCTIONS 2.1.1. OVERCURRENT UNITS The DBF system incorporates the following overcurrent detectors: • • • • Three Single Phase Low-Level Overcurrent Detectors (Used by the 50BF 1P function.) Three Single Phase High-Level Overcurrent Detectors. (Used by the 50BF 3P function.) One Ground Overcurrent Detector. (Used by the 3P No I function.
2. OPERATION LOGIC OR5 to the bottom input of AND4. Any pair of single BF initiation signals placed at AND5, AND6, or AND7 will activate the top input of AND4. This input to AND4 can also be ON if there is a 3P BF Initiation and Severe Fault 3P setting is set to ‘permitted’. Ground Overcurrent Breaker Failure Unit.
2. OPERATION LOGIC 2.2. MONITORING AND RECORDING FUNCTIONS 2.2.1 MEASUREMENT The DBF system provides the continuous measurement of phase and ground current values. These measurements can be accessed directly on the liquid crystal display (HMI) on the front of the relay, or via the GE-LOCAL communication software. 2.2.
2. OPERATION LOGIC Group 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3-9 3.10 3.11 3.12 3.13 3.14 3.
2. OPERATION LOGIC Group 5.9 5.10 5.11 5.12 5.13 5.14 5.15 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 6.11 6.12 6.13 6.14 6.15 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.11 7.12 7.13 7.14 7.15 8.0 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.
2. OPERATION LOGIC Group 8.9 8.10 8.11 8.12 8.13 8,14 8.15 9.0 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 9.10 9.11 9.12 9.13 9.14 9.15 10.0 10.1 10.2 10.3 10.4 10.5 10.6 10.7 10.8 10.9 10.10 10.11 10.12 10.13 10.14 10.
2. OPERATION LOGIC Group 4.0 - 4.15 Status Comment 5.0 -5.15 The DBF units are supplied with the following target LED’s default configuration: LED 1 Nº LEFT COLUMN TRIP STAGE 1 LED 9 Nº RIGHT COLUMN LOW SET PICKUP 2 TRIP STAGE 2 10 50BF POLE A INIT 3 PHASE A TRIP 11 50BF POLE B INIT 4 PHASE B TRIP 12 50BF POLE C INIT 5 PHASE C TRIP 13 INT. ARC A POLE 6 3P TRIP NO I 14 INT. ARC B POLE 7 INT. ARC TRIP 15 INT. ARC C POLE 8 HIGH SET PICKUP 16 REMOTE COMMUNICATIONS 2.2.
2. OPERATION LOGIC 2.2.5 BUILT-IN SELF-CHECKING UNIT The digital technology of the DBF system allows providing a built-in self-checking function which guarantees the correct performance of the unit, and provides an external alarm in case of error detection. Two built-in self-checking functions are performed, one when the unit is started up and the other during normal operation.
2. OPERATION LOGIC The user can select from the following list which signals may trigger the oscillography: Events to Trigger the Oscillography PICKUP 1ST STAGE TRIP 2ND STAGE TRIP INTERNAL ARC 50BF A TRIP 50BF B TRIP 50BF C TRIP 50BF 3P TRIP EXTERNAL TRIGGER COMM.
2. OPERATION LOGIC 2.4. CONTROL 2.4.1 TABLES OF SETTINGS The DBF system has two types of settings stored in non-volatile memory (information is kept even when there is no auxiliary voltage): • • Generic Settings. Specific Settings. The Generic settings are grouped as follows: GENERAL SETTINGS BREAKER SETTINGS ACTIVE TABLE SETTINGS OSCILLOGRAPHY MASK FUNCTION PERMISSION For the specific settings, the DBF allows to have up to 3 independent setting tables.
2. OPERATION LOGIC 2.4.2 TIME SYNCHRONIZATION. The DBF system includes an input for time synchronization. This input requires the connection of a device to supply a demodulated IRIG-B output. In this way coordinated universal time is measured to a high degree of accuracy and makes possible to tag events generated by the unit with a resolution of one millisecond. The use of this input makes it possible to correlate data obtained from different units thanks to synchronization with GPS satellites.
2. OPERATION LOGIC 2.4.3.2 Outputs The basic DBF system has 10 outputs as follows: • • • • • 2 tripping contacts (A12-B12 and C1-D1) 1 Breaker failure pickup signaling (A11-B11) 1 Internal arc detection (C2-D2) 1 Equipment alarm (C3-D3) 5 configurable contacts (C4-D4 to C8-D8) The optional expansion board for the DBF provides 6 additional latched contacts (E1-F1 to E6-F6).
2. OPERATION LOGIC 2.5. MAN-MACHINE INTERFACE (HMI) The DBF system includes as standard a 20 key keyboard and a 2-line liquid crystal display (LCD) with 16 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 settings, display measurements, carry out operations and access information stored in the unit.
2. OPERATION LOGIC 2.6. REMOTE COMMUNICATIONS The relay has 2 serial gates and three connectors. Gate 1 can be reached from the front of the relay in connector 1 (PORT 1 connector) or from the rear (PORT 2 connector). The second gate can be reached from connector 3 (PORT 3 connector) which is located on the rear. There are different models, each with a different physical connection for the PORT 3 connector (RS-232/RS-485 or fiber-optic). In the "RS232" models the three connectors are RS232.
3. SETTINGS 3. SETTINGS This section describes the settings of the DBF relay and the procedure to modify them. Table 3 shows the list of DBF settings, their range and resolution, and the factory default settings. To view or to modify settings using the GE_LOCAL program connected to PORT 1, PORT 2 or PORT 3 the user has to perform the following steps: • Check that the available connection cable is in accordance with the diagram in Figure 7.
3. SETTINGS Common to all tables Prefault Cycles Arc Detection Pickup st 1 Stage trip nd 2 Stage Trip 50BF A Trip 50BF B Trip 50BF C Trip 50BF 3P Trip External Trigger Communications Trigger Hi-Set A Pickup Hi-Set B Pickup Hi-Set C Pickup 50BF A Init. 50BF B Init. 50BF C Init. Lo-Set A Pickup Lo-Set B Pickup Lo-Set C Pickup 3P 50BF Init.
3. SETTINGS COMMENTS ON SETTINGS: 1. The Identification setting allows the user to input a name for the unit (for example the name of the line or feeder) with a maximum of 20 ASCII characters. 2. The Active Table setting allows selecting the table to be active during normal operation among the three tables available on the DBF. This selection can also be done by means of digital inputs configured for this purpose.
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4. TECHNICAL CHARACTERISTICS 4. TECHNICAL CHARACTERISTICS 4.1. MODEL LIST Position DBF 1 - - - - 1 1 - - 0 0 0 0 A 0 1 2 3 5 6 [1]] 7 1 2 8 M D 11 0 1 12 G H 13,14 15 A Description Comm. Interface P2: RS232 + P3: RS232 P2: RS232 + P3: Plastic F.O. P2: RS232 + P3: Glass F.O. P2: RS232 + P3: RS485 Ranges See Table [1R] Comm.
4. TECHNICAL CHARACTERISTICS 4.2. TECHNICAL CHARACTERISTICS MECHANICAL • • • • • • Metal 19” rack case, 2 units high IP51 Protection (as per IEC 529) Local HMI: LCD (2 rows, 16 characters) and 20 key keyboard Rear connection for wiring: 4 blocks, 12 terminals each (6 blocks when optional expansion board) Dimensions: 437 x 164 x 88 mm Weight: Net 6 kg. Shipping 7 kg.
4. TECHNICAL CHARACTERISTICS COMMUNICATIONS -RS232 using DB9 female connector (2/3 connectors depending on model) - Mode: Half duplex -1 mm plastic fiber-optic (depending on model) Typical power output : -8dBm Receiver sensitivity -39dBm Numeric aperture N.A. 0.5 Wave length 660 nm (visible red) HFBR-4516 type connector -Glass fiber-optic 62.5/125 (depending on model): Typical power output: -17.5 dBm Receiver sensitivity -25.4 dBm Numeric aperture N.A. 0.
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5. HARDWARE DESCRIPTION 5. HARDWARE DESCRIPTION CAUTION The DBF contains electronic components that can be damaged by electrostatic discharge if currents flow through some terminals of the internal components. The main source of electrostatic discharge currents is the human body, especially in conditions of low humidity, carpeted floors and isolated footwear. Under these conditions it is important to have special care when removing and handling the modules or some of their internal components.
5. HARDWARE DESCRIPTION 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 IRIG-B connection is made using a block of two additional terminals.
5. HARDWARE DESCRIPTION 5.2. OPERATING THEORY The DBF unit measures current signals, performs complex calculations using internal data, stores relevant incidents, pick-up tripping relays and generates information that can be used to determine the state of the associated electrical system. The DBF functionality is related to the following modules: - Magnetic module - CPU board - Power supply - Keyboard and display 5.2.1.
5. HARDWARE DESCRIPTION 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.
6. ACCEPTANCE TESTS 6. ACCEPTANCE TESTS 6.1. CONNECTIONS AND NECESSARY EQUIPMENT Necessary equipment: • • • • One current source One DC voltage source Precision timer for testing timed events One AC/DC voltmeter/ammeter Connect the relay as indicated in the external connections diagram, Figure 2. For safety reasons, the external protection earth should be securely grounded. Apply dc rated voltage to terminals A10-B10 6.2.
6. ACCEPTANCE TESTS 6.4. RELAY SETTING Introduce the following settings in the relay (by means of HMI or GE_Local software): General Settings Group Relay Status Identification Frequency Phase CT Ratio Neutral CT Ratio Breaker Settings Breaker Number KI2t Op. Mode KI2t INT.
6. ACCEPTANCE TESTS 8. Remove the current from terminals A1-A2. Remove voltage from digital input CC1. 9. Repeat these steps with minimum and maximum voltages depending on the range of the relay.
6. ACCEPTANCE TESTS 6.8. INPUTS 6.8.1 DIGITAL INPUTS Log into the relay using the GE_LOCAL software and press INPUTS / OUTPUTS button on the first general screen. • Check that applying dc rated voltage between terminals: C9 D9 C10 C11 D11 C12 and and and and and and D10 D10 D10 D12 D12 D12 (CC1) (CC2) (CC3) (CC4) (CC5) (CC6) their corresponding status windows turn red while the applied voltage remains present.
6. ACCEPTANCE TESTS 6.9. FUNCTIONS 6.9.1 50BF 1P UNIT TEST 1. Change setpoint GENERAL/FUNCTION PERMIT/50BF 1P FUNCTION to PER. 2. Change setpoint GENERAL/FUNCTION PERMIT/50BF 3P FUNCTION to NO PER. 3. Change setpoint TABLE 1/FUNCTION PERMIT/3P No INT FUNCT to NO PER. 4. Change setpoint 50BF SETTINGS/Nº OUTPUT STAGES to 2. 5. The precision timer will be started at the same time than the corresponding contact converter (digital input) is energized.
6. ACCEPTANCE TESTS 6.9.2 50BF 3P UNIT TEST The DBF relay outputs are factory set with the default settings shown in the external connections drawing (Figure 2). 1. Change setpoint GENERAL/FUNCTION PERMIT/50BF 1P FUNCTION to NO PER. 2. Change setpoint GENERAL/FUNCTION PERMIT/50BF 3P FUNCTION to PER. 3. Change setpoint GENERAL/FUNCTION PERMIT/3P No INT FUNCT to NO PER. 4. Change setpoint TABLE 1/50BF SETTINGS/Nº OUTPUT STAGES to 2. 5. Change setpoint TABLE 1/50BF SETTINGS/BF Logic (3P/2P) to 3 PHASE. 6.
6. ACCEPTANCE TESTS 6.9.3 INTERNAL ARC TEST 1. Change setpoint GENERAL/FUNCTION PERMIT/50BF 3P FUNCTION to NO PER. 2. Change setpoint TABLE 1/INTERNAL ARC SETTINGS/INT ARC TIMER to 2s. 3. Energize digital input CC4 52/b A 4. Apply 2A to terminals A1-A2 (phase A). 5. Check that after INT ARC TIMER time delay, contact C2-D2 is closed. 6. Repeat steps 3, 4 and 5 for phases B (terminals B1-B2) with digital input CC5 52/b B and C (terminals A3-A4) with digital input CC6 52/b C. 6.9.4 3P NO I FUNCTION 1.
6. ACCEPTANCE TESTS 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.
6. ACCEPTANCE TESTS 6.10. RELAY MEASUREMENT TESTS 6.10.1. CURRENT MEASUREMENT 1. Change setpoint GENERAL/FUNCTION PERMIT/50BF 1P FUNCTION to PER. 2. Change setpoint GENERAL/FUNCTION PERMIT/50BF 3P FUNCTION to NO PER. 3. Change setpoint GENERAL/FUNCTION PERMIT/3P No INT FUNCT to NO PER. 4. Change setpoint TABLE 1/50BF SETTINGS/PH LOSET PICKUP to 5A (1A in relays with 1A nominal current). 5. Change setpoint TABLE 1/50BF SETTINGS/1 PHASE TIMER T1 to 0.050s. 6.
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7. INSTALLATION AND MAINTENANCE 7. INSTALLATION AND MAINTENANCE 7.1. INSTALLATION The relay should be installed in a clean, dry and dust-free place, with no vibrations. The DBF system is supplied in a 19’’ rack case 2 units high. Figure 5 shows the dimension diagram. The relay should be mounted on a vertical surface. Figure 6 shows a diagram for panel drilling. Given that the design of the DBF unit is based on high performance digital technology it is not necessary to calibrate the relay.
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8. KEYBOARD AND DISPLAY 8. KEYBOARD AND DISPLAY The DBF has a 20 key keyboard and a liquid crystal DISPLAY with 32 characters, divided into two rows of 16 each. The following diagram shows the appearance of the DBF Keyboard: SET 1/Y 2 3/N INF 4 5 6 ACT 7 8 9 0 . END + CLR ENT The keyboard program uses menus to access the different relay functions. These functions are divided into five large groups, each of which is accessed using a different key.
8. KEYBOARD AND DISPLAY 8.1. MENU TREE. The DBF has different menus divided into levels. The Level 0 is the steady state screen. The Level 1 of the different menus is accessed by pressing the corresponding group key (SET, INF, etc.). The scrolling within a given level is done by using the UP and DOWN arrows. It is possible to go down to levels 2 and 3 by pressing the ENT key. Press CLR to go up a level within the menu tree.
8. KEYBOARD AND DISPLAY 8.2. SETTINGS GROUP (SET KEY) This group allows to see and modify the DBF settings. It is accessed by pressing the SET key when the DBF is in steady state. When the SET key is pressed the following message appears on the screen: VIEW SETTINGS PROTECTION When the UP/DOWN arrows are pressed the message changes to: MODIFY SETTINGS PROTECTION And the last UP/DOWN action gives: MODIFY COUNTERS PROTECTION For the above windows, the menu tree is shown in the following tables.
8. KEYBOARD AND DISPLAY Level 1 Level 2 Level 3 Level 4 50BF 1P FUNCTION PERM/NON-PERM. FUNCTION 50BF 3P FUNCTION PERM/NON-PERM. PERMIT 3P NO INT FUNCT. PERM/NON-PERM. PH HISET PICKUP 1.0-12A * PH LOSET PICKUP 1.0-12A * NEUTRAL PICKUP 0.5-6.0A * 1 PHASE TIMER T1 0.05-2s 3 PHASE TIMER T2 0.05-2s 50BF SETTINGS T1 3P NO I TIMER T3 0.05-2s BF LOGIC (3P/2P) 3 PHASE/2 PHASE SEVERE FAULT 3P PERM./NON-PERM. LOW LOAD 2P PERM/NON-PERM Nº OUTPUT STAGES 1/2 nd 0.
8. KEYBOARD AND DISPLAY If the setting entered is outside the limits of the valid range, the relay will not accept the change and will show the following message: SETTING OUT OF RANGE Some settings do not accepts numeric values; instead of that, different possibilities will be shown by pressing left/right arrow keys.
8. KEYBOARD AND DISPLAY 8.3. INFORMATION GROUP (INF KEY) On the steady-state(no communications request), the LCD display at the front of the relay shows the following: DBF GENERAL ELECTRIC By pressing the INF key, the next screen will show: STATUS This group provides information about the DBF. Press the ENT key to access this group.
8. KEYBOARD AND DISPLAY 8.4. CONTROL GROUP (ACT KEY) Being on the steady-state screen of LCD at the front of the relay, by Pressing ACT key, the following will prompt: SET DATE/TIME Pressing ENT key the system allows 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.
8. KEYBOARD AND DISPLAY 8.5. SINGLE KEY MENU Being on the steady-state screen of LCD at the front of the relay, by Pressing ENT key, the “single key menu” will be accessed.
8. KEYBOARD AND DISPLAY 8.6. CONFIGURATION MENU. The DBF has a configuration unit which can only be accessed by means of the keyboard. To enter the configuration, start from the main screen ‘DBF – GENERAL ELECTRIC’ and use the keyboard to enter a four-digit code. If the code is correct the access to the configuration unit is permitted. If not it returns to the main screen.
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FIGURES FIGURES .
FIGURES FIGURE 1 BREAKER FAILURE LOGIC (189C4114 SHEET 2) 52 DBF Breaker Failure Protection GEK-106168E
FIGURES FIGURE 2.
FIGURES FIGURE 3.
FIGURES FIGURE 4 REAR VIEW (226B7412H10) GEK-106168E DBF Breaker Failure Protection 55
FIGURES FIGURE 5 DIMENSIONS DIAGRAM (226B6086H10) 56 DBF Breaker Failure Protection GEK-106168E
FIGURES FIGURE 6 PANEL DRILLING (226B6086H10) GEK-106168E DBF Breaker Failure Protection 57
FIGURES DBF Label DB-9 Male Connector DB-9 Female Connector NOTE Leave shield unconnected at both ends 1 1 FIGURE 7 RS232 CONNECTION (DBF RELAY TO PC) DBF Label DB-9 Male Connector DB-9 Male Connector NOTE: 1 Leave shield unconnected at both ends 1 FIGURE 8 RS232 CONNECTION (DBF RELAY TO MODEM) 58 DBF Breaker Failure Protection GEK-106168E
