Areva MiCOM P441, Technical Manual

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P44x/EN AP/E33 Application Notes
Page 156/220 MiCOM P441/P442 & P444
P0526ENa
INP_52a_A
INP_52b_A
CBA_A
CBA_STATUS_ALARM
FIGURE 111 - COMPLEMENTARY OF 52a/52b IS LONG ENOUGH FOR GETTING THE ALARM
P0527ENa
INP_52a_A
CBA_A
CBA_STATUS_ALARM
FIGURE 112 - WITH ONE OPTO 52a- POLE DEAD LOGIC
P0528ENa
INP_52b_A
CBA_A
CBA_STATUS_ALARM
FIGURE 113 - WITH ONE OPTO 52b – POLE DEAD LOGIC
4.6.2 Inputs / outputs DDB for CB logic:
4.6.2.1 Inputs
External TripA
External TripB
External TripC
From External Protection Devices (via Opto Inputs)- see General trip logic Figure 94.
If these optos inputs are assigned as External Trip A, External Trip B and External Trip C
– their change will update the CB Operation counter.
(External trip is integrated in the DDB: Any Trip.No Dwell timer is associated as for an
internal trip. (see Figure 94: trip logic)
CB aux A(52a)
CB aux B(52a)
CB aux C(52a)
CB aux A(52b)
CB aux B(52b)
CB aux C(52b)
The DDB CB Aux if assigned to an opto input in the PSL and when energized, will be used
for Any pole dead & All pole dead internal logic & Discrepency logic
CB Discrepancy
Used for internal CBA_Disc issued by external (opto) or internal detection (CB Aux)