Section 7
1MAC050144-MB C
Control functions
480
615 series ANSI
Technical Manual
information in indications and event logging. The reporting of faulty or intermediate
position circuit breaker contacts occurs after the
Event delay
setting, assuming that the
circuit breaker is still in a corresponding state.
Table 413: Status indication
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 autoreclose functions, for example. The
blocking principles are the following:
• Enabling the open command: the function is used to block the operation of the open
command. Note that this block signal also affects the
OPEN
input of immediate
command.
• Enabling the close command: the function is used to block the operation of the close
command. Note that 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 circuit breaker 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 higher priority.
Open and close operations
The corresponding open and close operations are available via communication, binary
inputs or LHMI commands. As a prerequisite for control commands, there are enable and
block functionalities for both the close and open commands. If the control command is
executed against the blocking, or if the enabling of the corresponding command is not
valid, CBXCBR generates an error message.
Open and close pulse widths
The pulse width type can be defined with the
Adaptive pulse
setting. The function provides
two modes to characterize the opening and closing pulse widths. When the
Adaptive pulse
is set to TRUE, it causes a variable pulse width, which means that the output pulse is
deactivated when the object state shows that the circuit breaker has entered the correct
state. When the
Adaptive pulse
is set to FALSE, the function always uses the maximum
pulse width, defined by the user-configurable
Pulse length
setting. The
Pulse length
setting is the same for both the opening and closing commands. When the circuit breaker
Status (POSITION)
POSOPEN/OPENPOS
POSCLOSE/CLOSEPOS
OKPOS
1=Open
1=True
0=False
1=True
2=Closed
0=False
1=True
1=True
3=Faulty/Bad (11)
1=True
1=True
0=False
0=Intermediate (00)
0=False
0=False
0=False
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