Areva MiCOM P921, Technical Manual

Page: 166 / 376

P92x/EN FT/E11 Technical Guide
User Guide
Page 88/110 MiCOM P921-P922-P923
12.4 "TIME PEAK VALUE" Menu
This sub-menu makes it possible to set the period of time which will be used to
calculate average and maximum values.
To gain access to the “TIME PEAK VALUE” sub-menu from the default display,press
2
once, 4 once, 2 once and 6 3 times
.
TIME PEAK VALUE
Heading of the “TIME PEAK VALUE” sub-menu
TIME WINDOW
5 min
Description : setting of the period of time used to calculate the
average and maximum values of voltages.
Range : 5 / 10 / 15 / 30 / 60 min
12.5 "FREQ DISTURB REC" Menu (only MiCOM P923)
Frequency disturbance records are stored in the non-volatile memory. One record
could be stored, its duration is of 20 seconds ; the pre-trigger and the post-trigger
times are fixed at 5 and 15 seconds repectively.
The acquisition frequency of the frequency disturbance record is 1 sample per cycle of
the power system frequency.
Frequency disturbance records can be extracted either automatically (rear port only)
or manually (front or rear port).
The recording of data can be triggered by frequency element, any instantaneous or
time delayed information, activation of a logic input or a logic equation.
12.5.1 HMI description
To gain access to the "FREQ. DISTURB REC" menu from the default display, press 2
once, 4 once, 2 once and 4 once.
FREQ DISTURB REC
Heading of the “
Frequency Disturbance Records
”
menu
FREQ DISTURB REC
TRIG = ON TRIP
Description : configuration of the frrequency disturbance
records trigger.
Range : TRIP/FREQ/EQU.