Schweitzer Engineering Laboratories SEL-700G Series, Instruction Manual

Page: 229 / 824

4.123
Date Code 20170814 Instruction Manual SEL-700G Relay
Protection and Logic Functions
Group Settings (SET Command)
Settings Made Automatically
If the directional control enable setting EDIR is set:
EDIR := AUTO
then the following directional control settings are calculated and set
automatically:
Z2F, Z2R, 50QFP, 50QRP, a2, k2, 50GFP, 50GRP, a0, Z0F, Z0R, and
Z0MTA
If EDIR := AUTO, then Z0MTA is set equal to Z0ANG and Z0MTA is
hidden. Note that EDIR cannot be set to AUTO if ORDER := U and vice-
versa. Moreover, if ORDER := U, Z0FX and Z0RX are hidden and forced to -
0.10 and 0.10 ohms secondary respectively, irrespective of the nominal rating
of the CT.
Once these settings are calculated automatically, they can only be modified if
you go back and change the directional control enable setting to EDIR := Y.
The remaining directional control settings are not set automatically if setting
EDIR := AUTO. You must set these whether you are setting EDIR := AUTO
or Y. These settings are:
DIR1, DIR2, ORDER, and 50PDIRP
All these settings are explained in detail in the remainder of this subsection.
Not all of these directional control settings (set automatically or by you) are
used in every application. Following are directional control settings that are
hidden/not made for particular conditions.
I1 RST FAC I2/I1 0.02–0.50 a2Y := 0.10
I0 RST FAC I2/I0 0.10–1.20 k2Y := 0.20
FWD DIR RES LVL 0.05–5.00 A
d
50GFPY := 0.50
d
REV DIR RES LVL 0.05–5.00 A
d
50GRPY := 0.25
d
I1 RST FAC I0/I1 0.02–0.50 a0Y := 0.10
FWD DIR Z0 LVL –128.00 to 128.00 ohm
b
Z0FY := –0.06
b
REV DIR Z0 LVL –128.00 to 128.00 ohm
b
Z0RY := 0.06
b
ZRO SQ MX TQ ANG –90.00 to 90.00 deg Z0MTAY := 72.47
a
EDIRX cannot be set to AUTO when ORDERX := U.
b
Setting ranges and default ohm values shown are for 5 A nominal CT rating. Multiply by 5 for
1 A CTs.
c
On the X side, choice V and U are available when DELTAY_X := WYE or when DELTAY_X :=
DELTA and EXT3V0_X = VS or VN; On the Y side, choice V is available when DELTAY_Y :=
WYE. All combinations of available Q, V, and I are allowed on both sides. Option U, only
available on the X side, cannot be combined with other options—Q, V or I.
d
Setting ranges and default Amp values shown are for 5 A nominal CT rating. Divide by 5 for
1 A CTs.
e
50NFP, 50NRP and a0N are only available when ORDER := U. When ORDER := U, Z0FX and
Z0RX are hidden and forced to -0.10 and 0.10 ohms secondary, respectively, irrespective of
the nominal rating of the CT.
Table 4.31 Directional Element Settings for X Side and Y Side (Sheet 3 of 3)
Setting Prompt Setting Range
Setting Name :=
Factory Default