Schweitzer Engineering Laboratories SEL-351-5, Instruction Manual

Page: 505 / 706

12.5
Date Code 20070117
Instruction Manual SEL-351-5, -6, -7 Relay
Standard Event Reports, Sag/Swell/Interruption Report, and SER
Standard 15/30-Cycle Event Reports
The event type designations
AG
through
CAG
in Table 12.1 are only entered in
the
Event:
field if the fault locator operates successfully. If the fault locator
does not operate successfully, just TRIP or ER is displayed.
Fault Location
The relay reports the fault location if the EFLOC setting = Y and the fault
locator operates successfully after an event report is generated. If the fault
locator does not operate successfully,
$$$$$$
is listed in the field. If EFLOC =
N, the field is blank. Fault location is based upon the following:
➤
line impedance settings Z1MAG, Z1ANG, Z0MAG, and
Z0ANG
➤
source impedance settings Z0SMAG and Z0ANG
➤
corresponding line length setting LL
See the SET command in Table 9.1 and corresponding Line Settings (See
Settings Explanations on page 9.37) on page SET.1 for information on the line
parameter settings.
Targets
The relay reports the targets at the rising edge of TRIP. The targets include:
INST
,
COMM
,
S0TF
,
50
,
51
, and
81
. If there is no rising edge of TRIP in the
report, the
Targets
field is blank. See Front-Panel Target LEDs on page 5.31 .
Currents
The
Currents (A pri), ABCNGQ:
field shows the currents present in the event
report row containing the maximum phase current. The listed currents are:
➤
Phase (A = channel IA, B = channel IB, C = channel IC)
➤
Neutral ground (N = channel IN)
Table 12.1 Event Types
Event Type Description
AG, BG, CG
Single phase-to-ground faults. Appends T if TRIP asserted.
A, B, C Single phase-to-ground faults (Petersen Coil-
and ungrounded/ high-impedance grounded systems only).
Appends T if TRIP asserted.
ABC Three-phase faults. Appends T if TRIP asserted.
AB, BC, CA
Phase-to-phase faults. Appends T if TRIP asserted.
ABG, BCG, CAG
Phase-to-phase-to-ground faults. Appends T if TRIP asserted.
TRIP Assertion of Relay Word bit TRIP (fault locator
could not operate successfully to determine the
phase involvement, so just TRIP is displayed).
ER SEL
OGIC
control equation setting ER.
Phase involvement is indeterminate.
TRIG
Execution of TRIGGER command.
PULSE
Execution of PULSE command.
NOTE:
The fault locator will not
operate properly unless three-phase
voltages are connected.
NOTE:
The fault locator is most
accurate when the fault currents last
longer than two cycles.
NOTE:
The fault locator will not
operate for phase-to-ground faults on
Petersen Coil- or ungrounded/high-
impedance grounded systems.