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L3016
1SDH000559R0002
ABB SACE
SACE PR021/K
5.7.2. Signals
The signals (K51/1...K51/8) for the SACE PR212 protection release may be divided into 2 modes: Normal and Latch. A
description of the signals in these modes is given below.
5.7.2.1.
Normal mode (see par. 4.5.1)
Dip-switch no. 11 to be set to its OFF position.
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: If dip switch no. 10 (RESET) is set to its “MAN” position, the signals may be reset as described in par. 4.2.
Note 3: 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).
5.7.2.2.
Latch mode (see par. 4.5.2)
Dip-switch no. 11 to be set to its ON position.
Electric
contact
Event that caused closing of the relay
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)
K51/4
G protection alarm or trip (earth fault)
K51/5
Communication problems on the local bus (bus KO)
K51/6
Protection release TRIP alarm
K51/7
Protection release TRIP alarm
K51/8
L function prealarm (overload)
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)
---
A = G protection alarm (earth fault)
dip no. 4 = A
B = G protection trip (earth fault)
dip no. 4 = B
K51/5
Communication problems on the local bus (bus KO)
---
K51/6
Protection release TRIP alarm
---
K51/7
Protection release TRIP alarm
---
K51/8
L function prealarm (overload)
---
K51/1
K51/4
K51/2
