![background image](http://html.mh-extra.com/html/ge/dbf/dbf_instructions-manual_130280020.webp)
2. OPERATION LOGIC
GEK-106168E
DBF Breaker Failure Protection
13
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. In this way it is possible to obtain very useful information for analysis, cross-
referencing the information provided by different units for a given incident.
Alternatively, it is possible to synchronize units by means of communications, using the GE-LOCAL
communications software, or manually by means of the HMI. If the IRIG-B input is used 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 inputs (two groups of 3 inputs with one common in each group). The inputs
can be configured by the user by means of the GE-INTRO configuration program. Using the optional expansion
board it is possible to increase the number of inputs up to a total of 14 (2 groups of 3 inputs with one common in
each group and 4 groups of 2 inputs with one common in each group). See the external connections diagram for
additional reference.
One of the following meanings can be assigned to any input: (For more detail about the configuration of the
inputs, see GE-INTRO Instruction Book).
Function
P/L
Unused input
50BF Initiate A
L
50BF Initiate B
L
50BF Initiate C
L
3P BF Initiate
L
52a pole A
L
52a pole B
L
52a pole C
L
52b pole A
L
52b pole B
L
52b pole C
L
Latching Relays Reset
P
External Trigger
P
Active Table Select 0
L
Active Table Select 1
L
(L) indicates Level input
(P) indicates Pulse input
Содержание DBF
Страница 3: ......
Страница 7: ...LIST OF FIGURES iv DBF Breaker Failure Protection GEK 106168E ...
Страница 27: ...3 SETTINGS 20 DBF Breaker Failure Protection GEK 106168E ...
Страница 31: ...4 TECHNICAL CHARACTERISTICS 24 DBF Breaker Failure Protection GEK 106168E ...
Страница 45: ...6 ACCEPTANCE TESTS 38 DBF Breaker Failure Protection GEK 106168E ...
Страница 47: ...7 INSTALLATION AND MAINTENANCE 40 DBF Breaker Failure Protection GEK 106168E ...
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 ...