Hitachi Relion 670 Series Applications Manual page 154

Section 8
Current protection
Table 18:
Set value for the parameter CurrentInput
phase1
phase2
posSeq
1)
MaxPh
phase1-phase2
1) = Note that MaxPh current selection shall not be used when D2PTOC function is used as directional. It shall be only
used when function is used for non-directional operation.
VoltageInput: To select the type of energizing quantity (i.e. phasor) for voltage and will be used as
polarizing signal to detect the direction of faults if any of the two steps is set for Forward/Reverse
mode of operation.
Table 19:
Set value for the parameter VoltageInput
phase1
phase2
PosSeq
phase1-phase2
OperHarmRestr: To Off/On the 2nd harmonic restrain feature for the D2PTOC function.
I_2nd/I_fund: Operate level of 2nd harmonic current restrain set in % of the fundamental current. The
setting range is 10.0 - 50.0% in steps of 1%. The default setting is 20%.
RCADir: Relay characteristic angle set in degrees. It defines the middle line of the forward operating
sector in the directional plane.
ROADir: Relay operate angle value, given in degrees, to define the width of the forward operating
sector in the directional plane, shown in Figure 56.
LowVolt: To set low-voltage level in % of UBase for the direction detection. If measure voltage is
below this set level, the setting ActLowVoltx (where x = 1 & 2) decides the function behavior.
148
Current selection for D2PTOC function
Voltage selection for D2PTOC function
For directional operation of the D2PTOC function, the identical values for current and
voltage measurement selection shall be set (e.g. both set to PosSeq, or both set to
phase1).
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Comment
D2PTOC function will measure the phase L1 current
D2PTOC function will measure the phase L2 current
D2PTOC function will measure internally calculated
positive sequence current
IL 1
D2PTOC function will measure current of the phase with
maximum magnitude
D2PTOC function will measure the current internally
calculated as the vector difference between the phase L1
current and phase L2 current
Comment
D2PTOC function will measure the phase L1 voltage
D2PTOC function will measure the phase L2 voltage
D2PTOC function will measure internally calculated
positive sequence voltage
UL
D2PTOC function will measure the voltage internally
calculated as the vector difference between the phase L1
voltage and phase L2 voltage
Railway application RER670
1MRK506375-UEN Rev. N

IL 2 / 2
IL IL

1 UL 2 / 2

UL UL
Application manual