(sequence) Heading Description
of specific phase(s) Involved is considered desirable,
add it in the "Remarks" column.
Type of Fault
For forced outages resulting from electrical faults,
LO If the fault
was three-phase, line-to-line, double-line-to-ground,
line open, or
respectively. If fault type was unknown, uncertain or
undetermined, show "UNK."
For other forced outages, such as system oscillations
or the intentional removal of equipment from service
to prevent damage or failure, leave this column blank.
This column also should be left blank for all scheduled
(S) and operational (
) type outages.
This column should contain an entry for each facility
experiencing an outage for which an entry is made
to a Reclamation customer was interrupted, "N" (no) that
there was no interruption, or 'T' (interconnection) to
indicate that service was supplied by wheeling over
an interconnected foreign system and it was not
known whether any off-system Reclamation customer
suffered an interruption in service as the result of the
Indicate by "F," "S," or "
" whether the outage was
forced, scheduled, or operational.
A forced outage results from emergency conditions
requiring that essential equipment be taken out of
service immediately, either automatically or as soon
as switching operations can be performed, or results
from improper operation of equipment or employee error.
A scheduled outage results when equipment is
deliberately taken out of service at a selected time,
usually for purposes of construction, maintenance or
A key test to determine whether an outage should be
classified as forced or scheduled is as follows: If it is
possible to defer the outage, it is a scheduled outage;
otherwise it is a forced outage. Deferring an outage
may be desirable, for example, to prevent overload of
other facilities or an interruption of service to customers.
(FIST 1-3 12/89)