Appendix B -Settings and Signals
MENU TEXT COL ROW DEFAULT SETTING AVAILABLE OPTIONS
DESCRIPTION
This setting enables (turns on) or disables (turns off) a special feature to cover scenarios when there is a very weak positive or negative
sequence source behind the relay, but the zero sequence infeed is large. Special to stub-end transformer feeding, where the stub end has no
generation, but has solid earthing at a Yd transformer neutral.
I0/I2 Setting 46 12 3
From 2 to 3 in steps of 0.2
[Courier Number (decimal)]
If the ratio of zero sequence current to negative sequence current exceeds the setting, all protection elements such as Distance, DEF and
Delta that could potentially operate during a genuine weak infeed condition will be inhibited. This setting will be visible only if ‘WI Inhibit’ is
CTS Mode 46 31 Disabled
Standard / Enabled
I Diff
IDiff + Std
Setting to disable, enable the standard (voltage dependant) CTS element
CTS Status 46 32 Restrain
Indication
This setting determines whether the following operations will occur upon detection of CTS.
• CTS set to provide alarm indication only.
• CTS set to restrain local protection
The settings are visible if CTS Mode is not disabled.
CTS Reset Mode 46 33 Manual
Auto
The CTS block will be latched after a user settable time delay ‘CTS Time Delay’. Once the signal has latched then two methods of resetting
are available. The first is manually via the front panel interface (or remote communications) and secondly, when in ‘Auto’ mode, provided the
CTS condition has been removed. The setting is visible if CTS Mode is not disabled.
CTS Time Delay 46 34 5
From 0 to 10 in steps of 0.01
[Courier Number (time-seconds)]
Setting that determines the operating time-delay of the element upon detection of a current transformer supervision condition. The setting
is visible if CTS Mode is not disabled
CTS VN< Inhibit 46 35 5
From 0.5*V1 to 22*V1 in steps of 0.5*V1
[Courier Number (voltage)]
This setting is used to inhibit the current transformer supervision element should the zero sequence voltage exceed this setting. The setting
is visible if CTS Mode is not disabled
CTS IN> Set 46 36 0.1
From 0.08*I1 to 4*I1 in steps of 0.01*I1
[Courier Number (current)]
This setting determines the level of zero sequence current that must be present for a valid current transformer supervision condition. The
setting is visible if CTS Mode is not disabled
48 00
This column contains settings for System Checks
Live Line 48 85 32
From 5 to 132 in steps of 0.5
[Courier Number (voltage)]
Line is considered Live with voltage above this setting.
Dead Line 48 86 13
From 5 to 132 in steps of 0.5
[Courier Number (voltage)]
Line is considered Dead with voltage below this setting.
Live Bus 1 48 87 32
From 5 to 132 in steps of 0.5
[Courier Number (voltage)]
Bus 1 is considered Live with voltage above this setting.
Dead Bus 1 48 88 13
From 5 to 132 in steps of 0.5
[Courier Number (voltage)]
Bus 1 is considered Dead with voltage below this setting.
To Next Page
Loading...
