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TABLE OF CONTENTS
GEK-106168E DBF Breaker Failure Protection i
TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
1. GENERAL DESCRIPTION AND APPLICATION........................................................................................... 1
1.1. GENERAL DESCRIPTION................................................................................................................................. 1
2. OPERATION LOGIC ...................................................................................................................................... 3
2.1. PROTECTION FUNCTIONS.............................................................................................................................. 3
2.1.1. Overcurrent units.......................................................................................................................................... 3
2.2. MONITORING AND RECORDING FUNCTIONS.............................................................................................. 5
2.2.1 Measurement ............................................................................................................................................... 5
2.2.2 Associated Breaker Status........................................................................................................................... 5
2.2.3 Target Lamps ............................................................................................................................................... 5
2.2.4 Circuit Breaker Breaking Capacity Monitoring ............................................................................................. 9
2.2.5 Built-in Self-Checking Unit.......................................................................................................................... 10
2.3. ANALYSIS FUNCTIONS......................................................................................................................................... 10
2.3.1 Event Recorder. .......................................................................................................................................... 10
2.3.1 Oscillography .............................................................................................................................................. 10
2.4. CONTROL .......................................................................................................................................................... 12
2.4.1 Tables of Settings ...................................................................................................................................... 12
2.4.2 Time Synchronization.................................................................................................................................. 13
2.4.3 Configurable Inputs and Outputs ............................................................................................................... 13
2.5. MAN-MACHINE INTERFACE (HMI)........................................................................................................................ 15
2.6. R
EMOTE COMMUNICATIONS................................................................................................................................16
3. SETTINGS.................................................................................................................................................... 17
4. TECHNICAL CHARACTERISTICS.............................................................................................................. 21
4.1. M
ODEL LIST....................................................................................................................................................... 21
4.1.1. Special Models........................................................................................................................................... 21
4.2. TECHNICAL CHARACTERISTICS ............................................................................................................................ 22
5. HARDWARE DESCRIPTION ....................................................................................................................... 25
5.1. P
HYSICAL DESCRIPTION..................................................................................................................................... 25
5.1.1. Case.......................................................................................................................................................... 25
5.1.2. Electrical Connections............................................................................................................................... 25
5.1.3. Internal Construction ................................................................................................................................. 25
5.2. OPERATING THEORY.......................................................................................................................................... 27
5.2.1. Magnetic Module....................................................................................................................................... 27
5.2.2. CPU Board ................................................................................................................................................ 27
5.2.3 Power Supply ............................................................................................................................................. 28
5.2.4 Keyboard and Display................................................................................................................................ 28
6. ACCEPTANCE TESTS................................................................................................................................. 29
6.1. C
ONNECTIONS AND NECESSARY EQUIPMENT ...................................................................................................... 29
6.2. V
ISUAL INSPECTION ........................................................................................................................................... 29
6.3. P
ANEL INSULATION TESTS.................................................................................................................................. 29
6.4. R
ELAY SETTING................................................................................................................................................. 30
6.5. I
NDICATORS........................................................................................................................................................ 30
6.6. P
OWER SUPPLY................................................................................................................................................. 30
6.7. C
OMMUNICATIONS .............................................................................................................................................. 31
6.8. I
NPUTS ............................................................................................................................................................... 32
6.8.1 Digital inputs................................................................................................................................................ 32
6.8.2 IRIG-B Synchronizing Input........................................................................................................................ 32
6.9. FUNCTIONS......................................................................................................................................................... 33
6.9.1 50BF 1P Unit Test...................................................................................................................................... 33
6.9.2 50BF 3P Unit Test...................................................................................................................................... 34
6.9.3 Internal Arc Test......................................................................................................................................... 35
6.9.4 3P NO I FUNCTION.................................................................................................................................... 35