ERL L-PRO 4000, User Manual

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6 Offliner Settings Software
D02706R02.30 L-PRO 4000 User Manual 6-15
Target Latching On
This option specifies whether the front Target LED is latched or not. Target
Latching on means that the target LED remains on after a trip until it is reset
through the front by Human Machine Interface (HMI). If the Target Latching
is set off the target light comes on during a relay trip and will reset.
Base MVA
The base MVA is used for recording purposes.
CT Turns Ratio and PT Turns Ratio
The CT and PT ratios are specified for the monitoring of analog inputs. All CT
and PT ratios are specified with a ratio relative to one. The line protection uses
the main current and the main voltage to operate. When 2 sets of CTs (main
and auxiliary) are used as line current input (e.g. ring bus application), the user
must enable ring bus configuration to configure the relay. If enabled, the cur-
rents from the 2 sets of CTs are added to the relay to form the line current. For
Base MVA 1.00 to 2000.00 MVA (primary)
Target Latching On (global) Enable/Disable
Phase Rotation ABC or ACB
Fault Location Display Enable/Disable
Aux Voltage Input 3-phase/1-phase
Fault Location Initiated by 21 Alarm Enable/Disable
CT Turns Ratio
Ring Bus Configuration (Aux. CT Line
Input) Enable/Disable
Main CT Turns Ratio 1.00 to 10000.00 (For protection and recording)
Auxiliary CT Turns Ratio 1.00 to 10000.00 (For protection and recording)
Current Input #3 CT Ratio 1.00 to 10000.00 (For Mutual compensation,
Recording and ProLogic Input)
Current Input #4 CT Ratio 1.00 to 10000.00 (For Mutual compensation,
Recording and ProLogic Input)
PT Turns Ratio
CCVT Transient Compensation on All 21
Devices Enable/Disable
Main PT Turns Ratio 1.00 to 20000.00 (For Protection and Recording)
Auxiliary PT Turns Ratio 1.00 to 20000.00 (For protection and recording)
Line
Line to Line Voltage 1.00 to 2000.00 kV (Primary)
Distance Units km or miles
Table 6.9: System Parameters