ABB SACE PR021/K, Manual

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L3016 1SDH000559R0002
ABB SACE
SACE PR021/K
5.10.2. Signals
The signals (K51/1...K51/8) for the SACE PR223EF protection release may be divided into 3 modes: Normal, Latch and
User. A description of the signals in these modes is given below.
5.10.2.1. 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: Use of the PR010/T test unit interrupts communication with the PR021/K unit, which will signal a
communication error on the local bus by closing the K51/5 contact.
5.10.2.2. Latch mode (see par. 4.5.2)
The dip-switches are to be set as follows: Dip-switch no. 5 = A, Dip-switch no. 11 = ON.
Electric
contact
Event that caused closing 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 or EF protection trip (instantaneous short-circuit) ---
K51/4
G protection alarm or trip (earth fault) ---
K51/5
Communication problems on the local bus (bus KO) ---
K51/6
Backup protection alarm (Note 2) ---
K51/7
Protection release TRIP alarm ---
A = L Function prealarm (overload) dip no. 4 = A
B = Interlock alarm dip no. 4 = B
K51/8
Electric
contact
Event that caused closing of the relay
Selection of dip-switches
no. 2, 3, 4
A = L protection alarm (overload) dip no. 2 = A
B = L protection trip (overload) dip no. 2 = B
A = S protection alarm (selective short-circuit) dip no. 3 = A
B = S protection trip (selective short-circuit) dip no. 3 = B
K51/3
I protection trip (instantaneous short-circuit) ---
K51/4
G protection alarm (earth fault) ---
K51/5
Communication problems on the local bus (bus KO) ---
K51/6
Backup protection alarm ---
K51/7
Protection release TRIP alarm ---
A = L Function prealarm (overload) dip no. 4 = A
B = Interlock alarm dip no. 4 = B
K51/8
K51/1
K51/2