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I.L. 40-385.5
oscillographic data taken.
Where:
TRIP — start data taken only if trip action
occurs.
Z2TR — start data taken if Zone-2 units
picks up or any trip action occurs.
Z2Z3 — start data taken if Zone-2 or Zone-3
units picks up, or any trip action
occurs.
∆I∆V
— start data taken if ∆I, ∆V, Zone-2 or
Zone-3 units picks up, or any trip
action occurs.
∆
∆
Note: Setting at
I
V is not recommended be-
cause a lot of meaningless data will be
stored, such as breaker switching, etc.
For example, Set MDAR (REL-300) OSC = Z2Z3
(2) The FDAT setting is for selecting the one of the
3 ways, TRIP/Z2TR/Z2Z3, to initiate the fault
data taken.
Where:
TRIP — start to store fault data only if trip
action occurs.
Z2TR — start to store fault data if Zone-2
units picks up or any trip action occurs.
Z2Z3 — start to store fault data if Zone-2 or
Zone-3 units picks up or any trip action
occurs.
For
example,
FDAT = Z2Z3
(3) The frequency setting, FREQ, should be
selected to match the power system operating
frequency. For example, select FREQ = 60 if
the power system operating frequency is 60
hertz.
MDAR (REL-300)
Z1P/Z1G/Z2P/Z2G
Z3P/Z3G/PLTP/PLTG
ITP/ITG
IL/IM/IOS/IOM
13-6
Set
MDAR
(REL-300)
UNITS
0.01-50.00,
in 0.01 ohms steps
2.0-150.00,
in 0.5 amp steps in
0.5-10.0,
in 0.1 amp steps in
For this example, Set MDAR (REL-300)
FREQ = 60
(4) The current transformer type setting, CTYP,
provides the flexibility for 5 ampere or 1
ampere rated current transformer selection.
For example, select and set the CTYP = 5 if a 5
ampere current transformer is used.
For this example, Set MDAR (REL-300)
CTYP = 5
The setting of CTYP affects all the distance
unit and over- current unit setting ranges. The
ranges will be automatically changed as listed
in Table 1:
(5) The read primary setting, RP, should be set at
YES if all the monitoring ac voltages and cur-
rents are selected to be displayed in primary
KV and KA values, respectively.
For example, Set MDAR (REL-300) RP = NO
(6) The ohms per unit distance of the line reac-
tance setting, XPUD, is the multiplier for fault
distance display. It has a range of 0.3 to 1.5 in
0.001 steps. For this example, the line reac-
tance is 0.8 ohms/mile, then Set MDAR (REL-
300) XPUD = 0.800
The fault distance calculation is as follows:
DM
=
Where Z
and FANG is fault angle.
(7) The setting of DTYP (distance type) has a
selection of MILE and KM. It should be
selected to match with the setting of XPUD. For
this
example,
DTYP = MILE.
Table 1:
At CTYP = 5
0.05-250,
in 0.05 ohms steps
0.4-30.0,
0.1 amp steps
0.1-2.0,
0.02 amp steps
×
∠
Z
sin
FANG
VTR
S
×
------------ -
------------------------------------------- -
CTR
XPUD
is secondary impedance magnitude,
s
Select
MDAR
At CTYP = 1
(REL-300)
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