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It is absolutely essential that each and every circuit in the electri-
cal system be properly installed by a qualified electrician.
3�4 CABLEPROTECTION(FUSES)
It is the installer's responsibility to protect the live wires between
the genverter and the PMG/DC PowerCube. Check the electrical
information on the identification plate in order to calculate the
right fuse size.
Please note that the above is in addition to any fuses required
between the PMG/DC PowerCube and the AC installation or
batteries, as applicable.
3�5 GROUNDING
The AC alternator windings are not grounded.
The housing of the alternator and all other metal parts are
grounded.
The electric installation in the vessel needs to be protected
against insulation failures. Methods of protection are subject to
rules that may differ depending on the use of the vessel and local
standards. Experts in this field should be consulted.
Be aware that insulation protection systems can be different
for different applications and even within the ship there could
be different standards for different spaces. Sometimes other
standards shall be complied with, e.g. for certification societies
such as Lloyd's Register of Shipping or Veritas, regulations for
the protection of personnel, building legislation, etc. It is of the
greatest importance to have expert advice on this issue.
For safety reasons connect the main ships ground to the negative
of the generating set start battery. However, when a ungrounded
DC system or positive grounded DC system is applied the battery
negative should not be connected to the main ships ground.
3�6 CABLE
For the power cable we recommend the use of 3 wire oil resis-
tant cable with a sufficient cross sectional area. For long cables it
is recommended to apply cables with a larger cross section (refer
to ISO 13297, Annex A).
3�7 TRANSFER SWITCH
A power source selector switch much be installed between the
PMG box and the vehicle's electrical supply system. This switch
must ensure that all AC consumers can be switched off at once.
This switch should also be installed to keep the generating set
and "land" (grid) power systems separate.
Transfer switches - to switch over from a land line to vehicle
or from generating set to inverter - should be well designed to
switch over all wires including neutral (and not only phases or
line) and there should be provisions with the aid of timers to
prevent relays from clattering.
Piccolo 6 Marine Diesel Genverter
Whisper Power recommends the installation of a Systemswitch
as the power source selector. This works automatically when the
generating set is not running the input remains in the land line
position and as soon as the generating set is running the Mass
Systemswitch switches automatically after 10 seconds delay time
over to the generating set position.
Stage V certified / EPA / Tier 4
Inallsituationsthetransferswitchesbetweenland
line,inverterandGenvertershouldswitchboth
neutralandL1.
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