ABB SACE PR021/K - 5.16.2. Signals

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ABB SACE
SACE PR021/K
In the example, the PR021/K has been set as follows:
• Self-test function disabled
• K51 configuration = A-A-A-A
• Master mode
• Baud rate = 19.2Kb/s
• Stand-by function not active
• Manual Reset mode
• Latch mode disabled
• Local bus not terminated
5.16.2. Signals
The signals (K51/1...K51/8) for the SACE PR333/P protection release may be divided into 3 modes: Normal, Latch and
User. A description of the signals in these modes is given below.
5.16.2.1. Normal mode (see par. 4.5.1)
The dip-switches are to be set as follows: Dip-switch no. 5 = A, Dip-switch no. 11 = OFF.
Note 1: Following a TRIP, the status of the signals is frozen signalling the trip (K51/7) and the protection that caused
it.
Note 2: The signals bearing this marking are not frozen as indicated in Note 1.
Note 3: If dip switch no. 10 (RESET) is set to its “MAN” position, the signals may be reset as described in par. 4.2.
Note 4: If dip switch no. 10 (RESET) is set to its “AUT” position, the signals are reset automatically when the trip on
the protection unit is reset (see par. 4.2).
Note 5: If a trip is caused by a protection function not included in the set of signals (for example, a trip for “protection
G” has occurred but the K51/4 relay was set for the “LC1 load control” signal), only the K51/7 relay (the protection
release TRIP alarm) will be switched.
Electric
contact
Event that caused closi ng of the relay
Selection of dip-switches
no. 2, 3, 4
K51/1
L protection alarm or trip (overload) ---
K51/2
S protection alarm or trip (selective short-circuit) ---
K51/3
I protection trip (instantaneous short-circuit) ---
A = G protection alarm or trip (earth fault) dip no. 2 = A
B = LC1 load control (Note 2) dip no. 2 = B
K51/5
Communication problems on the local bus (bus KO) ---
A = L Function prealarm (overload) dip no. 3 = A
B = LC2 load control (Note 2) dip no. 3 = B
K51/7
Protection release TRIP alarm ---
A = Backup protection alarm (Note 2) dip no. 4 = A
B = Hardware alarm dip no. 4 = B
K51/8
K51/4
K51/6