Term
Abbreviation Explanation
Programmable logic
controller
PLC
A digital computer used for the automation of electromechanical processes.
Protection and
Power Management
PPM
A versatile controller consisting of several modules and display unit designed for
marine use.
Pt100, Pt1000
Platinum temperature sensors
Pulse width
modulation
PWM
Terminals with an output that uses variable pulse widths, and behaves as an
analogue output.
Rack
An aluminium box with a rack system that houses the hardware modules. Each
controller consists of a rack and a number of hardware modules.
Running
A genset is regarded as running if the engine is started and there is running
detection. A running engine does not necessarily have to be synchronised with the
busbar.
Section
Part of the busbar that is isolated from the rest of the busbar because bus tie
breaker(s) are open. Busbar sections can run independently of each other, and do
not have to be synchronised.
SEMI mode
A controller operating mode. Operator commands (for example, close breaker) start
pre-programmed sequences in the controller. Apart from trips, the controller does
not automatically open or close breakers or start or stop equipment.
Shaft generator
SG
A generator installed on the ship's main shaft that produces electricity.
Shaft generator
breaker
SGB
The breaker between the shaft generator and the main busbar/switchboard. A
SHAFT generator controller can control a shaft generator breaker.
SHAFT generator
controller
Controls and protects the power supply from the shaft generator.
Shelve
A temporary state that an alarm can be assigned to by an operator. Shelved alarms
are inactive alarms, but only for a selected period by the operator. When the period
of time expires, the alarm is automatically unshelved by the system restoring the
alarm to the previous alarm state. Alarm conditions are checked again.
Shore connection
SC
The ship is supplied with electricity from land while in harbour through the shore
connection.
Shore connection
breaker
SCB
The breaker between the shore connection and the main busbar/switchboard. A
SHORE connection controller can control a shore connection breaker.
SHORE connection
controller
Controls and protects the power supply from the shore connection.
Shutdown
An emergency or fast stop of the genset engine. No cooldown time is allowed.
Supervision
A PICUS function to monitor the operation of the entire system, and to send
commands to any of the controllers.
Switchboard
The cabinet where the power sources are connected to the power consumers. See
Busbar too.
Switchboard control
SWBD control
A controller operating mode. Power management and operator commands to the
controller are disabled. The operator controls the system using the switchboard.
The controller monitors operation, and the controller protections are active (that is, if
an operating value activates an alarm, the controller does the alarm action).
System
The gensets, the other power sources, all breakers, the busbars, and all their
controllers. Within the system, the DEIF controllers work together to supply the
power required safely and efficiently.
Third-party
equipment
Equipment other than the DEIF controller. For example: The genset, the genset
engine control system, the wiring, the busbars, and the switchboard.
PPM 300 PICUS manual 4189341080 UK
www.deif.com
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