Schweitzer Engineering Laboratories SEL-251 - Page 86

3-28 Communications Date Code 970103
SEL-251, -2, -3 Instruction Manual
Following is a list of global settings with setting ranges and explanations.
=>>SET G <ENTER>
SET clears events. CTRL-X cancels.
SEL-151-R400 Global Settings
Enter data, or <ENTER> for no change
Range
DEMR : Dem Reset Grp Chg Y/N?.........................= Y ?
Reset the demand values when an active setting group change is made.
CFT : Cl Fail Time, cyc.......................................= 60 ? 0-16000
Close failure time. If CFT = 0, CLOSE output contact deasserts
if breaker closes per circuit breaker status input (52A, !52A, 52AR, or !52AR)
or TRIP output contacts assert.
TDUR : Trip Dur, cyc .............................................= 4 ? 0-63
Trip duration time
TFT : Trip Fail Time, cyc....................................= 30 ? "
Trip failure time
TGR : Grp Chg Dly, cyc.......................................= 180 ? 0-16000
Setting Group Selection inputs (SS1, SS2, SS3) have to stabilize for
time TGR before the relay changes setting groups.
ITT : Inst Tar Time, cyc......................................= 5 ? 0-63
INST front panel target illuminates if TRIP occurs less than ITT time
after any Relay Word row R1 overcurrent element picks up. Setting ITT=0
defeats the INST target.
TIME1 : Port 1 Timeout, min...................................= 15 ? 0-30
(=0, no timeout)
TIME2 : Port 2 Timeout, min...................................= 0 ? "
(=0, no timeout)
AUTO : Autoport 1,2 or 3.......................................= 2 ?
1 = Port 1, 2 = Port 2, and 3 = both
Port to receive automatic messages
RINGS : Rings 1-30..................................................= 3 ?
Number of rings after which modem on Port 1 answers
Inputs IN1 through IN6 can be assigned to one of the following functions:
SS1 Setting Group Selection Input 1 (assign to IN1 only)
SS2 Setting Group Selection Input 2 (assign to IN2 only)
SS3 Setting Group Selection Input 3 (assign to IN3 only)
TCP External Torque Control (Phase and Negative-Sequence Elements)
!TCP (inverted sense of TCP)