Required Settings Application; Oscillographic Data (Osc Data) Capture Setting; Fault Data (Flt. Data) Capture Setting; Current Transformer Ratio Setting (Ct Ratio) 3 - ABB REL 301 Instruction Leaflet

I.L. 40-386.4
3.3.

REQUIRED SETTINGS APPLICATION

The following settings are determined by the application. They do not require calculation.
3.3.1 Oscillographic Data ("OSC Data") Capture Setting
The OSC setting is for selecting one of the 4 choices, "TRIP", "Z2TR", "Z2Z3" or "∆I∆V", to
initiate the oscillographic data taken, where:
"TRIP" – data taken only if trip action occurs.
"Z2TR" – data taken if Zone-2 units pick up, or any trip action occurs.
"Z2Z3" – data taken if Zone-2 or Zone-3 units pick up, or any trip action occurs.
"∆I∆V" – data taken if DI, DV, Zone-2 or Zone-3 units pick up, or any trip action occurs.
NOTE:
3.3.2 Fault Data ("Flt Data") Capture Setting
Is for selecting one of the 3 ways "TRIP", "Z2TR", "Z2Z3" to initiate the fault data taken, where:
"TRIP" – to store fault data only if trip action occurs.
"Z2TR" – to store fault data if Zone-2 units pick up or any trip action occurs.
"Z2Z3" – to store fault data if Zone-2 or Zone-3 units pick up or any trip action occurs.
3.3.3 Current Transformer Ratio Setting ("CT Ratio")
The "CT Ratio" is used for the fault distance calculation and load current monitoring, if it is se-
lected to be displayed in primary amperes. It has no effect on the protective relaying system.
For this example, set "CT Ratio" = 240.
3.3.4 Voltage Transformer Ratio Setting ("VT Ratio")
The "VT Ratio" is used for the fault distance calculation and system voltage monitoring, if it is
selected to be displayed in primary volts. It has no effect on the protective relaying system.
For this example, set "VT Ratio" = 600.
3.3.5 Frequency Setting ("Freq.")
Should be selected to match the power system operating frequency.
For this example, set "Freq." = 60
3.3.6 Current Transformer Type Setting ("CT Type")
Provides the flexibility for 5 amp or 1 amp rated current transformer selection.
3-10
The setting of "∆I∆V", for OSC is not recommended since data will be col-
lected for all disturbances including normal operations.