Marine Installation Manual 2022-03 4-113
4 Ancillary Systems
4.13 PTO, PTI, PTH and primary generator applications
X62DF-S2.0
4.13 PTO, PTI, PTH and primary generator applications
WinGD proposes various Power Take-Off (PTO) and Power Take-In (PTI) ar-
rangements that improve the efficiency and usability of the vessel’s propulsion
chain. Some of the proposals are even suitable as Power Take-Home (PTH) de-
vices, which enable the vessel to immobilise the main engine while remaining ca-
pable of moving. Furthermore, the primary generator enables the vessel to
generate electric power by the main engine without running the propeller.
A PTO/PTI/PTH solution can be applied on the driving end side, while a PTO
solution can also be applied on the free end side.
For installation of a PTO/PTI/PTH on the driving end side, a shaft power meter
(see subsection Shaft power meter requirements,  1-11) and an earthing device
(see section 3.10.2 Earthing device,  3-19) must be placed between the
PTO/PTI/PTH and the main engine’s flywheel.
4.13.1 Requirements
After selecting the engine:
1) Define the shaft power and the shaft speed.
2) Estimate the electric power demand for propulsion purpose.
3) Evaluate which of the PTO /PTI systems is the most suitable.
4) Select suitable electrical components like frequency converter, etc.
4.13.2 Arrangements for PTO, PTI, PTH and primary generator
Figure 4-68,  4-114 illustrates the different arrangements for PTO, PTI, PTH
and primary generator.
NOTE
All other alternatives are subject to a detailed project-specific study and
definition. Please consult WinGD via their licensee.
NOTE
The type of the PTO / PTI system has an influence on the execution of
the main engine. Thus, changing from one system type to another is
possible in the project stage but not after having ordered the engine.
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