Appendix B -Settings and Signals
MENU TEXT COL ROW DEFAULT SETTING AVAILABLE OPTIONS
DESCRIPTION
Zone 1 Gnd. PSB 3D 0D Blocking
Blocking
Delayed Unblock
Setting that defines the Z1 ground element operation should any swing impedance enter and remains inside the Z1 ground characteristic for
more then ‘tZ1 Gnd. Delay’.
If Blocking is selected, the Z1 ground element operation will be disabled for the duration of the swing.
If Unblocking is chosen, the Z1 ground element block will be removed after drop off timer ‘PSB Unblocking Dly’ has expired, even if the swing
is still present. This allows system separation when swings fail to stabilize.
In ‘Allow trip’ mode, the Z1 ground element is unaffected by PSB detection.
Zone 2 Gnd. PSB 3D 0F Blocking
Blocking
Delayed Unblock
Setting that defines the Z2 ground element operation should any swing impedance enter and remains inside the Z2 ground characteristic for
more then ‘tZ2 Gnd. Delay’.
If Blocking is selected, the Z2 ground element operation will be disabled for the duration of the swing.
If Unblocking is chosen, the Z2 ground element block will be removed after drop off timer ‘PSB Unblocking Dly’ has expired, even if the swing
is still present. This allows system separation when swings fail to stabilize.
In ‘Allow trip’ mode, the Z2 ground element is unaffected by PSB detection.
Zone 3 Gnd. PSB 3D 11 Blocking
Blocking
Delayed Unblock
Setting that defines the Z3 ground element operation should any swing impedance enter and remains inside the Z3 ground characteristic for
more then ‘tZ3 Gnd. Delay’.
If Blocking is selected, the Z3 ground element operation will be disabled for the duration of the swing.
If Unblocking is chosen, the Z3 ground element block will be removed after drop off timer ‘PSB Unblocking Dly’ has expired, even if the swing
is still present. This allows system separation when swings fail to stabilize.
In ‘Allow trip’ mode, the Z3 ground element is unaffected by PSB detection.
Zone P Gnd. PSB 3D 13 Blocking
Blocking
Delayed Unblock
Setting that defines the ZP ground element operation should any swing impedance enter and remains inside the ZP ground characteristic for
more then ‘tZP Gnd. Delay’.
If Blocking is selected, the ZP ground element operation will be disabled for the duration of the swing.
If Unblocking is chosen, the ZP ground element block will be removed after drop off timer ‘PSB Unblocking Dly’ has expired, even if the swing
is still present. This allows system separation when swings fail to stabilize.
In ‘Allow trip’ mode, the ZP ground element is unaffected by PSB detection.
Zone 4 Gnd. PSB 3D 15 Blocking
Blocking
Delayed Unblock
Setting that defines the Z4 ground element operation should any swing impedance enter and remains inside the Z4 ground characteristic for
more then ‘tZ4 Gnd. Delay’.
If Blocking is selected, the Z4 ground element operation will be disabled for the duration of the swing.
If Unblocking is chosen, the Z4 ground element block will be removed after drop off timer ‘PSB Unblocking Dly’ has expired, even if the swing
is still present. This allows system separation when swings fail to stabilize.
In ‘Allow trip’ mode, the Z4 ground element is unaffected by PSB detection.
PSB Unblocking 3D 20 Disabled
Disabled
Enabled
To enable (activate) or disable (turn off) the PSB Unblocking delay timer.
This setting is common to all zones and it is visible if any distance zone is set to ‘PSB Unblocking Dly’. For swing durations longer than this
setting, blocking can be selectively removed.
PSB Unblock dly 3D 21 2
From 0.1 to 10 in steps of 0.1
[Courier Number (time-seconds)]
Unblock timer setting - on expiry, power swing blocking can optionally be removed.
PSB Reset Delay 3D 22 0.2
From 0.05 to 2 in steps of 0.05
[Courier Number (time-seconds)]
Setting to maintain the power swing detection for a period after the delta current detection has reset. ΔI will naturally reset momentarily
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