ABB 615 Series ANSI, Technical Manual

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Section 7
1MAC050144-MB C
Control functions
516 615 series ANSI
Technical Manual
7.2.10 Technical data
Table 428: 79 Technical data
7.3 Synchronism and energizing check, 25
7.3.1 Identification
7.3.2 Function block
Figure 280: Function block
7.3.3 Functionality
The synchrocheck function 25 checks the condition across the circuit breaker from
separate power system parts and gives the permission to close the circuit breaker. 25
function 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.
Characteristic Value
Trip time accuracy ±1.0% of the set value or ±20 ms
Functional description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Synchronism and energizing check SECRSYN SYNC 25
25
V_BUS
V_LINE
BYPASS
SYNC _INPRO
SYNC_OK
CL_FAIL_AL
CMD_FAIL_AL
CL_COMMAND
BLOCK LLDB
LLLB
DLLB
DLDB