Areva MiCOM P921 - Page 142

P92x/EN FT/E11 Technical Guide
User Guide
Page 64/110 MiCOM P921-P922-P923
11.3.4 Additional information for the MiCOM P923
BLOCK1 df/dt1 =
NO
Description : selection of the 1
st
stage of the rate of change of
frequency which will be blocked by energisation of the "BLK
LOG1" logic input.
Range : YES/NO
BLOCK1 df/dt2 =
NO
Description : selection of the 2
nd
stage of the rate of change of
frequency which will be blocked by energisation of the "BLK
LOG1" logic input.
Range : YES/NO
BLOCK1 df/dt3 =
NO
Description : selection of the 3
rd
stage of the rate of change of
frequency which will be blocked by energisation of the "BLK
LOG1" logic input.
Range : YES/NO
BLOCK1 df/dt4 =
NO
Description : selection of the 4
th
tage of the rate of change of
frequency which will be blocked by energisation of the "BLK
LOG1" logic input.
Range : YES/NO
BLOCK1 df/dt5 =
NO
Description : selection of the 5
th
tage of the rate of change of
frequency which will be blocked by energisation of the "BLK
LOG1" logic input.
Range : YES/NO
BLOCK1 df/dt6 =
NO
Description : selection of the 6
th
tage of the rate of change of
frequency which will be blocked by energisation of the "BLK
LOG1" logic input.
Range : YES/NO
11.3.5 Example of configuration
The aim is :
The user wants to block the first undervoltage stage if the logic input n°2 is energised.
Settings are :
· select “YES” for the information «tV<« in the “BLOCKING LOG1 t” menu. See
above,
· select the logic input n°2 in the “INPUTS” sub-menu (see § 11.9) and allocate to
this input the information “BLK LOG1”, as indicated below :
INPUT 2 =
BLK LOG1
11.4 "BLOCKING LOG2 t" Menu
The aim of this sub-menu is identical to the one of the “BLOCKING LOG1 t” sub-
menu. In consequence, its description is not done in this Technical Guide.
To gain access to the “BLOCKING LOG2 t” sub-menu from the default display, press
2 once, 6 5 times(P921) or 6 times(P922 and P923), 2 once and 6 3 times.