Term Abbreviation Explanation
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.
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.
Tie breaker TB
Used to connect/disconnect the emergency busbar from the main busbar. The
EMERGENCY genset controller can control a tie breaker. (Note: The breaker
between two main busbars is called a bus tie breaker.)
Time t
Trip
An emergency or fast opening of a breaker. No attempt is made to de-load the
breaker before it opens.
Voltage V
Electrical potential difference. U is used as an abbreviation for voltage in most of
Europe, Russia and China.
Voltage and
frequency
V & Hz
For certain controller actions, both the voltage and frequency must be within the
specified range. For example, for busbar OK, or to start synchronising a genset to
the busbar.
16.2 Units
The table below lists the units used in the documentation, as well as the US units where these are different. In the
documentation, the US units are given in brackets, for example, 80 °C (176 °F).
PPM 300 Operator's manual 4189340910 UK
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