Electricity
The Steerprop propulsors require an external
feed of electricity for the control, for the display
and emergency steering as well as for the alarms.
The system is of 24 V DC type and the electricity
is required to the control cabinets, normally situated
in the engine room. The electricity demand is approx.
300 W for the main steering, approx 150 W for the
back-up steering and display and approx. 10 W for
the alarms. The electricity feed is required to
be continuous with a battery backup.
Cabling
The controls will require four cables for each
propulsor to be drawn between the wheelhouse control
stand and the engine room / propulsor room. There
are two cables for the main control, one for the
back-up control and display and one cable for the
alarms. All cables should be standard ship control
cables meant for analog and digital controls.
External Tanks
The Steerprop propulsors require a shaft seal
tank of approx. 20 litre capacity for each propulsor
to be installed in the propulsor room. For units
with hydraulic steering (normal for stern drive
tugs) a hydraulic unit - comprising required tanks
(capacity 60 …100 litres), filters, valves and coolers
- need to be installed close to each propulsor .
The unit is delivered as a part of the Steerprop
delivery. The hydraulic unit need to be connected
to the propulsor with 6 pipes between the propulsor
and the hydraulic unit and 5 pipes between the hydraulic
unit and the propulsor.
