Distance Schemes - GE MiCOM P40 Agile Technical Manual

P44x/EN ST/Hb6
(ST) 4-18
Menu text
GROUP 1: DISTANCE SCHEMES
Program Mode
The 'Program Mode' cell is used to select the standard program mode or open program
mode. When Standard program mode is set, a standard basis scheme is selectable.
When a scheme is not covered in the Standard modes, the open programming mode can be
selected. The user then has the facility to decide which distance relay zone is to be used to
program the signalling channel, and what type of aided scheme runs when the channel is
received. The signal send zone options, and the aided scheme options on channel receipt
are settable.
Standard Mode
The following schemes are available when the Standard program mode is selected:
– Basic + Zone 1 extended (see section P44x/EN AP),
– Permissive Underreach Transfer Trip Schemes PUP Z2 and PUP Fwd,
– Permissive Overreach Transfer Trip Schemes POP Z2 and POP Z1;
– Blocking Schemes BOP Z2 and BOP Z1.
The PUP, POP and BOP schemes are detailed in section P44x/EN AP.
Fault Type
Trip Mode
Sets the tripping mode: 1-pole trip or 3-pole trip.
Sig. Send Zone
The 'Signal Send Zone' option is available when an open scheme program mode is set. The
user can decide which distance relay zone is used to send the signalling channel:
– CsZ1 or CsZ2 ('Carrier send' from Z1 or Z2): when a fault is detected in zone 1, or zone 2,
the 'Carrier Send' is emitted from this zone to the relay. These settings are used to
configure a permissive scheme.
– CsZ4 ('Carrier send' from Z4) when a fault is detected in zone 4 (reverse). This setting
can be used to configure a blocking scheme. See section decision logic in the section
P44x/EN AP.
Dist CR
The 'Distance Carrier received' option is available when an open scheme program mode is
set.
Aided scheme options on CR receipt:
– Select 'None' to configure a basic scheme,
– Select 'PermZ1' or 'PermZ2' to configure a permissive scheme where Zone 1 or Zone 2
can only trip (without waiting tZ1 or tZ2 timeout) if a signal is received,
– Select 'BlkZ1' or 'BlkZ2' to configure a blocking scheme where Zone 1 or Zone 2 can only
trip if a Distance Carrier is NOT received,
– Select 'PermFwd' to configure a permissive scheme where any forward distance zone
start causes an aided trip if a Distance Carrier is received.
Default setting
Standard Scheme Standard Scheme
Open Scheme
Basic + Z1X Basic + Z1X, POP Z1,
POP Z2, PUP Z2, PUP Fwd, BOP Z1,
BOP Z2.
Both Enabled Phase to Ground,
Phase to Phase,
Both Enabled.
Force 3 Poles Force 3 Poles,
1 Pole Z1 & CR,
1 Pole Z1 Z2 & CR.
None None, CsZ1, CsZ2, CsZ4.
None None, PermZ1, PermZ2, PermFwd, BlkZ1,
BlkZ2.
MiCOM P40 Agile P442, P444
Setting range
Min Max
Setting
Step size