Status Recognition And Monitoring Of The Circuit Breaker - Siemens siprotec SJ62 User Manual

2 Functions

2.14.3 Status Recognition and Monitoring of the Circuit Breaker

Circuit Breaker
Status
235
The detection of the actual circuit breaker position is necessary for the correct func-
tionality of the auto reclose function. The breaker position is detected by the circuit
breaker auxiliary contacts and is communicated to the device via binary inputs 4602
„>52-b" and 4601 „>52-a".
Here the following applies:
• If binary input 4601 „>52-a" and binary input 4602 „>52-b" are used, the auto-
matic reclosure function can detect whether the circuit breaker is open, closed or in
intermediate position. If both auxiliary contacts detect that the circuit breaker is
open, the dead time is started. If the circuit breaker is open or in intermediate posi-
tion without a trip command being present, the automatic reclosure function is
blocked dynamically if it is already running. If the automatic reclosure system is in
normal state, it will be blocked statically. When checking whether a trip command
applies, all trip commands of the device are taken into account irrespective of
whether the function acts as starting or blocking element on behalf of the automatic
reclosure program.
• If binary input 4601 „>52-a" alone is allocated, the circuit breaker is considered
open while the binary input is not active. If the binary input becomes inactive while
no trip command of (any) function applies, the automatic reclosure system will be
blocked. The blocking will be of static nature if the automatic reclosure system is in
normal state at this time. If the automatic reclosing system is already running, the
blocking will be a dynamic one. The dead time is started if the binary input becomes
inactive following the trip command of a starting element 4601 „>52-a" = inactive).
An intermediate position of the circuit breaker cannot be detected for this type of
allocation.
• If binary input 4602 „>52-b" alone is allocated, the circuit breaker is considered
open while the binary input is active. If the binary input becomes active while no trip
command of (any) function applies, the automatic reclosure system will be blocked
dynamically provided it is already running. Otherwise the blocking will be a static
one. The dead time is started if the binary input becomes active following the trip
command of a starting element. An intermediate position of the circuit breaker
cannot be detected for this type of allocation.
• If neither binary input 4602 „>52-b" nor 4601 „>52-a" are allocated, the auto-
matic reclosure program cannot detect the position of the circuit breaker. In this
case, the automatic reclosure system will be controlled exclusively via pickups and
trip commands. Monitoring for "52-b without TRIP" and starting the dead time in de-
pendence of the circuit breaker feedback is not possible in this case.
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015