Operating instructions

18 Operating Instructions
Present Status
The Present Status screen displays the present (real-time) conditions of the static switch, which is
updated every second while the screen is displayed. It includes active alarms, source voltages,
source currents, frequency, and the output kVA and kW.
Figure 15 Present Status Screen
Event History
The Event History screen displays the history of the static switch active alarms in sequence of
occurrence. The sequence of occurrence is identified by date, time, and frame number. The last
128 alarms are stored in a nonvolatile memory and can be viewed from the Event History screen
by using the Up and Down keys to sequence through the frames.
Figure 16 Event History Screen
History Status
The History Status screen displays 64 sequential frames in 4-millisecond intervals of the Present
Status screens surrounding the occurrence of a major alarm. The Up and Down keys are used to
sequence through the frames. The sequence of occurrence is identified by date, time, and frame
number. The History Status frames are stored in a nonvolatile memory buffer that is continu-
ously overwritten until a designated fault condition occurs. Upon occurrence of a designated fault
condition, the History Status buffer stores the next 23 frames, then freezes until reset. At that
time, the “History Stored” message is displayed on the Monitor/Mimic screen and the History Sta-
tus screens can be viewed. The History Status buffer then contains 40 frames before the fault, the
PRESENT STATUS 06/17/95 14:06:26 FRAME 35
ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000
**** ACTIVE ALARMS **** Transfer Inhibit Peak-I1 OVLD
SOURCE 1 VOLTS
SOURCE 1 AMPS
END OF REPORT
A
480
150
KVA
B
480
150
KWC
480
150
HERTZ
60.0
EXIT
SELECT :
125
101
60.0
SOURCE 2 VOLTS
SOURCE 2 AMPS
480
0
480
0
480
0
LOAD
EVENT HISTORY 06/15/95 10:34:27 FRAME 41
ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000
**** ACTIVE ALARMS **** Transfer Inhibit Peak-I1 OVLD
Source1 UV
Source1 Fail
EXIT
SELECT :
PREVIOUS FRAME
DOWN :
NEXT FRAME
UP :