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5.2.7
The read primary setting (RP)
The RP should be set at YES if all the monitoring ac voltages and currents are selected to be
displayed in primary KV and KA values, respectively.
5.2.8
Ohms per unit distance of the line primary reactance setting (XPUD)
XPUD is the multiplier for fault distance display. It has a range of 0.3 to 1.5 in 0.001 steps. In
this example, the line primary reactance is 0.8 ohms/mile; set XPUD = 0.8.
The fault distance calculation is as follows:
MI
=
Where Z
5.2.9
The setting of DTYP (distance type DKM &DMI) has a selection of MILE and KM. It should be selected
to match with the setting of XPUD. For this example, select DTYP = MILE.
5.2.10 The setting of TTYP is for selecting the reclosing mode in single pole trip applications (if applicable).
It has six selecting positions (OFF, 1PR, 2PR, 3PR, SPR, and SR3R). Refer to the guidelines
for reclosing mode programming for the TTYP setting selection.
5.2.11 For an SPT application, set the 62T single phasing limit timer from 300 to 5000 ms in 50 ms steps.
The setting is based on the generator's (I
90% of the rated line-to-neutral voltage.
5.2.12 The settings of PTRI, Z1RI, Z2RI and Z3RI provide the selectivity for Pilot RI (reclosing initiation),
Zone-1 RI, Zone 2-RI and Zone 3 RI, respectively. For the non-pilot system application, set
Z1RI, Z2RI and/or Z3RI to YES, if RI is required when the particular distance zone operates.
For the pilot reclosing, Z1RI should be set to "YES".
5.2.13 For a pilot system, set BFRB to YES if RB on the breaker failure squelch feature is required.
5.2.14 The setting of PLT (pilot) combines with the signal of Pilot Enable (on the backplane panel) and con-
trols the operation of pilot and reclosing initiation. The absence of either signal will:
• disable the pilot system
• block the RI2 output, and
• allow an RI1 output for a non-pilot system.
The PLT can be set either locally from the front panel or, remotely, via the communication chan-
nel.
5.2.15 The STYP (system type) selects the desired relaying system for the application. It has two selections:
3ZNP (3 zone non-pilot) and Z1E (Zone 1 extension) in the non-pilot REL300. There are five
selections: 3ZNP, Z1E, POTT (permissive overreach transfer trip or unblocking), PUTT (per-
×
∠
sin
Z
FAN
VTR
S
×
---------- -
--------------------------------------
CTR
XPUD
is the secondary impedance magnitude, and FANG is the fault angle.
S
2
)
t performance. LV should be set between 85% and
2
I.L. 40-385.7
5-9
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