ABB 615 Series - Synchronism and Energizing Check 25

9.3 Synchronism and energizing check 25
9.3.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Synchronism and energizing check SECRSYN SYNC 25
9.3.2 Function block
GUID-465E8B64-8E18-4C99-BB96-B27F383AC539 V2 EN
Figure 491: Function block
9.3.3 Functionality
The synchronism and energizing check function 25 checks the condition across the circuit
breaker from separate power system parts and gives the permission to close the circuit
breaker. 25 includes the functionality of synchrocheck and energizing check.
Asynchronous operation mode is provided for asynchronously running systems. The main
purpose of the asynchronous operation mode is to provide a controlled closing of circuit
breakers when two asynchronous systems are connected.
The synchrocheck operation mode checks that the voltages on both sides of the circuit
breaker are perfectly synchronized. It is used to perform a controlled reconnection of two
systems which are divided after islanding and it is also used to perform a controlled
reconnection of the system after reclosing.
The energizing check function checks that at least one side is dead to ensure that closing
can be done safely.
The function contains a blocking functionality. It is possible to block function outputs and
timers if desired.
Section 9 1MAC059074-MB A
Control functions
976 615 series ANSI
Technical Manual