Areva MiCOM P441, Technical Manual

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Application Notes P44x/EN AP/E33
MiCOM P441/P442 & P444 Page 15/220
2.5 General Distance Trip logic
2.5.1 Equation
Z1'.T1. BZ1 . PZ1
+ Z1x'.(None + Z1xSiAnomTac.UNB_Alarm).[ T1. INP_Z1EXT]
+ UNB_CR.T1.[ PZ1.Z1'+PZ2.Z2'+PFwd.Aval’]
+ UNB_CR .T1.(Tp +
INP_COS(*)
).[ Z1'.BZ1 + (Z2'.BZ2. INP_COS
(*)
])
+ T2 [ Z2' + PZ1.Z1' + BZ1.Z1']
+ Z3'.T3
+ Zp' .Tzp
+ Z4'.T4
[(*) from version A2.10 & A3.1]
(See Figure 3 in section 2.7.2.1- Z’ logic description)
Remarks: 4. In case of COS (carrier out of service), the logic swap back to a
basic
scheme.
5. In the column Data Type:"Configuration" means MiCOM S1 Setting
(the parameter is present in the settings).
With the inputs/outputs described above:
2.5.2 Inputs
Data Type Description
T1 to T4 Internal logic Elapse of Distance Timer 1 to 4 (T1/T2/T3/TZp/T4)
Tp Internal logic Elapse of transmission time in blocking scheme
Z1' to Z4' (*) Internal logic Detection of fault in zones 1 to 4
(lock out by PSWing or Rev Guard) – See figure 3 section
2.7.21
Forward’ Internal logic Fwd Fault Detection l (lockout by reversal guard)
UNB_CR Internal logic Carrier Received
INP_COS TS Opto Carrier Out of Service
CSZ1 Configuration Carrier send in case of zone 1 decision
CSZ2 Configuration Carrier send in case of zone 2 decision
CSZ4 Configuration Carrier send in case of zone 4 decision (Reverse)
None Configuration Scheme without carrier
PZ1 Configuration Permissive scheme Z1
PZ2 Configuration Permissive scheme Z2
PFwd Configuration Permissive Scheme with directional Fwd
BZ1 Configuration Blocking scheme Z1
BZ2 Configuration Blocking scheme Z2
INP_Z1EXT Internal logic Zone extension (digital input assigned to an opto by
dedicated PSL)
Z1xChannel Fail Configuration Z1x logic enabled if channel fail detected (Carrier out of
service = COS)
UNBAlarm Internal logic Carrier Out Of Service
(*) the use of an apostrophe in the above logic (Z'1) is explained in section 2.7.2.1 Figure 3