Siemens siprotec SJ62 User Manual page 179

2 Functions
Behaviour in Case
of Power Supply
Failure
177
EMERGENCY) which is started when the binary input drops out and continues sup-
pressing a trip signal. Tripping by the overload protection will be defeated until this
time interval elapses. The binary input affects only the tripping signal. There is no
effect on the trip log nor does the thermal profile reset.
Depending on the setting in address 235 ATEX100 of Power System Data 1 (see
Section 2.1.3) the value of the thermal replica is either reset to zero (ATEX100 = NO)
if the power supply voltage fails, or cyclically buffered in a non-volatile memory
(ATEX100 = YES) so that it is maintained in the event of auxiliary supply voltage failure.
In the latter case, the thermal replica uses the stored value for calculation and matches
it to the operating conditions. The first option is the default setting (see /5/). For further
details, see /5/.
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015