4–106 845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
SYSTEM CHAPTER 4: SETPOINTS
MIN TAP
Range: -19 to +35 in steps of 1
Default: -16
This setting defines the minimum tap from the tap changer. The 845 uses the setting to
signal when the minimum tap is reached.
NEUTRAL TAP
Range: -17 to +37 in steps of 1
Default: 0
This setting defines the neutral tap position. The 845 uses the setting to signal when the
neutral tap is reached.
MAX TAP
Range: 0 to +39 in steps of 1
Default: +16
This setting defines the maximum tap from the tap changer. The 845 uses this setting to
signal when the maximum tap is reached.
MIN TAP VOLTAGE
Range: 0.01 to 20000.00 kV in steps of 0.01 kV
Default: 61.00 kV
Enter the voltage at the minimum position
VOLTAGE INCREMENT PER TAP
Range: 0.01 to 20.00 kV in steps of 0.01 kV
Default: 0.50 kV
Enter the voltage increment per tap change.
Ohms at MIN TAP
Range: 0 to 5100 Ohms in steps of 1 Ohm
Default: 33 Ohms
Enter the resistance in Ohms corresponding to the minimum tap. This setting is used
only when Ohms input is selected as “Tap Detection Input”.
Ohms at MAX TAP
Range: 0 to 5100 Ohms in steps of 1 Ohm
Default: 1089 Ohms
Enter the resistance in Ohms corresponding to the maximum tap. This setting is used
only when Ohms input is selected as “Tap Detection Input”.
DCmA at MIN TAP
Range: 0.000 to 20.000 mA in steps of 0.001 mA
Default: 4.000 mA
Enter the DCmA current corresponding to the minimum tap. This setting is used only
when Analog In 1 is selected as “Tap Detection Input”.
DCmA at MAX TAP
Range: 0.000 to 20.000 mA in steps of 0.001 mA
Default: 18.000 mA
Enter the DCmA current corresponding to the maximum tap. This setting is used only
when Analog In 1 is selected as “Tap Detection Input”.
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