Areva MiCOM P521, Documentation Update

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Update Documentation P521/EN AD/B21
MiCOM P521 Page 9/24
Cold Load PU
t Therm.? Yes
Associates the thermal threshold with the cold load pick up
function. To associate the thermal threshold with the cold
load pick up function, press 5 and select (Yes). Select
(No) if the user does not wish to associate the thermal
threshold with the cold load pick up function. Validate
your choice using
5 .
Cold Load PU
level 200 %
Selection of the cold load pick up percentage scaling value
associated with the selected thresholds. Select from 20%
to 500% in steps of 1 % using
8 or 2 and validate your
choice using 5 .
Cold Load PU
tCL = 400 ms
Selection of the cold load pick up time delay. Select from
100 ms to 3600 s in steps of 10 ms using
8 or 2 and
validate your choice using 5 .
3.5.4.12 Circuit breaker failure sub menu
The CB Fail sub menu makes it possible to enable the circuit breaker failure detection
function and its associated settings.
AUTOMAT. CTRL
Heading of the AUTOMAT. CTRL Menu. To gain access to
the CB Fail menu, press
2 , 6 , 6 times, 2 , followed by
6
13 times.
CB Fail
Heading of the CB Fail sub menu. To gain access to the
sub menu points, press
2
.
CB Fail?
No
Enables / Disables the circuit breaker failure function. If
the user validates (Yes), the following menu is displayed. If
the user selects (No), the breaker failure function is
inactive.
I<=
0.1 In
Selects the under current threshold associated with the CB
failure detection function. Select from 0.02 In to 1 In in
steps of 0.01 In.
CB Fail Time
tBF 100 ms
Selects the circuit breaker failure time delay. Select from
30 ms to 10 s in steps of 10 ms using
8 or 2 and
validate your choice using 5 .
Block I>?
No
Select the possibility to block the instantaneous signal I> in
the event of a circuit breaker failure. Select Yes or No.