Operation Principle - ABB RELION 620 Series Technical Manual

Section 9
Control functions
9.1.4
706

Operation principle

Status indication and validity check
The object state is defined by two digital inputs, POSOPEN and POSCLOSE, which are
also available as outputs OPENPOS and CLOSEPOS together with the OKPOS
information. The debouncing and short disturbances in an input are eliminated by
filtering. The binary input filtering time can be adjusted separately for each digital input
used by the function block. The validity of the digital inputs that indicate the object state
is used as additional information in indications and event logging. The reporting of faulty
or intermediate position of the apparatus occurs after the Event delay setting, assuming
that the circuit breaker is still in a corresponding state.
Table 529: Status indication
Status (POSITION)
1=Open
2=Closed
3=Faulty/Bad (11)
0=Intermediate (00)
Blocking
52 has a blocking functionality to prevent human errors that can cause serious injuries for
the operator and damages for the system components.
The basic principle for all blocking signals is that they affect the commands of other
clients: the operator place and protection and autoreclosing functions, for example. There
are two blocking principles.
• Enabling the opening command: the function is used to block the operation of the
opening command. This block signal also affects the OPEN input of immediate
command.
• Enabling the closing command: the function is used to block the operation of the
closing command. This block signal also affects the CLOSE input of immediate
command.
The ITL_BYPASS input is used if the interlocking functionality needs to be bypassed.
When INT_BYPASS is TRUE, the apparatus control is made possible by discarding the
ENA_OPEN and ENA_CLOSE input states. However, the BLK_OPEN and BLK_CLOSE
input signals are not bypassed with the interlocking bypass functionality since they always
have the higher priority.
POSOPEN/OPENPOS POSCLOSE/
CLOSEPOS
1=True 0=False
0=False 1=True
1=True 1=True
0=False 0=False
1MAC504801-IB E
OKPOS
1=True
1=True
0=False
0=False
620 series ANSI
Technical Manual