Table 11.4
Breaker commands (optional)
Function
I/O
Type
Details
Breakers > Shore
connection breaker >
Command > SCB action
open
Digital
input
Pulse
This input starts the breaker de-load and opening procedure.
This input can also be used to confirm the selection, when
Operator select
is
selected under
Breaker action
.
If the
Breaker action
parameter is set to
Open without de-loading
, or
Operator
select
, then activating this input overrides the parameter selection.
Breakers > Shore
connection breaker >
Command > SCB action
open without de-loading
Digital
input
Pulse
This input checks if it is allowed to open the breaker without de-loading the breaker
first, and starts the breaker open without de-loading procedure.
This input can also be used to confirm the selection, when
Operator select
is
selected under
Breaker action
.
If the
Breaker action
parameter is set to
Open shore connection breaker
, or
Operator select
, then activating this input overrides the parameter selection.
Parameters
Configure the parameters under
Configure > Parameters > Shore breaker configuration > Configuration
.
Table 11.5
Additional shore connection parameters
Parameter
Range
Default
Notes
Overlap
•
Not enabled
•
Enabled
Not enabled
See
Sensitive shore connection (overlap)
later in this chapter for more
information about the
Overlap
function.
Breaker
action
•
Open shore
connection
breaker
•
Open without
de-loading
•
Operator select
Open shore
connection
breaker
Open shore connection breaker
: When the operator activates the open
breaker command, the controller starts the open breaker sequence. If more
than one shore connection is connected, the power management system de-
loads and opens all the closed shore connection breakers.
Open without de-loading
: When the operator activates the open breaker
command, the controller checks if it is safe to open the breaker without de-
loading it first, and then opens the breaker if it is safe to do so. If more than one
shore connection is connected, the controller only opens the shore connection
breaker it is connected to.
Operator select
: When the operator activates the open breaker command, the
operator receives a message in PICUS or on the display unit to select whether
to open the breaker, open without de-loading, or cancel the action. After an
action is selected, the controller performs the selected action to open the
breaker it is connected to, or to open the breaker it is connected to without de-
loading it first.
11.3 Shore connection breaker
11.3.1 Introduction
The shore connection breaker (SCB) connects the shore connection to the busbar. For the shore connection breaker to close, the
shore connection must be live, and the ship busbar must be synchronised with the shore connection. The shore connection breaker
is an important part of the system safety, and trips to protect the shore connection from problems on the busbar. If it is configured
correctly, the shore connection breaker also trips to stop shore connection problems from disturbing the busbar.
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