GE MiCOM P40 Agile Technical Manual page 237

Application Notes
MiCOM P40 Agile P442, P444
Accronyms used in the previous equation:
• Inputs:
T1 to, T2, T3, T4,
TZp, TZq
'Aid Dist Delay'
Z1', Z2', Z3', ' to
Z4' (*), Zp', Zq'
Forward'
UNB_CR
INP_COS
None
PZ1
PZ2
PFwd
BZ1
BZ2
INP_Z1EXT
Z1xChannel Fail
UNBAlarm
• Outputs:
PDist_Dec
CsZ1
CsZ2
CsZ4
2. The inputs Z1X must be polarised for activating Z1X the logic.
3 For the 1P – 3P trip logic check in the Tripping logic section.
Description
Elapsed of Distance Timer 1 to 4 (T1 / T2 / T3 / TZp / TZq / T4)
Elapse of d transmission time in blocking scheme
Detection of fault in zones 1 to 4
(lock out by PSWing or Rev Guard).
Forward Fault Detection l (lockout by reversal guard)
Carrier Received
Carrier Out of Service
Scheme without carrier
Permissive scheme Z1
Permissive scheme Z2
Permissive Scheme with directional Fwd
Blocking scheme Z1
Blocking scheme Z2
Zone extension (digital input assigned to an opto input by
dedicated PSL)
Z1x logic enabled if channel fail detected (Carrier out of
service = COS)
Carrier Out Of Service
Description
Distance protection Trip trip
Carrier send in case of zone 1 decision
Carrier send in case of zone 2 decision
Carrier send in case of zone 4 decision (Reverse)
P44x/EN AP/Hb6
(AP) 5-85