Whisper Power M-SQ6 Installation Manual page 17

1 FUSE
An output fuse (from the generating set to the system)
should be installed to protect the installed electrical
system. The following maximum single phase output
current applies:
Model
M-SQ6
The fuses must be of the slow reacting type. For electrical
motors connected to the system, a motor protection switch
must be installed.
2 GROUNDING
The AC alternator windings are not grounded.
The housing of the alternator and all other metal parts are
grounded
To make a connection between "neutral" and "ground" is
necessary as part of a specific insulation failure protection
system.
Small pleasure craft in Europe (length up to 24 meter) is
submitted to The Recreational Craft Directive 94/25/EC.
The guidelines of this directive refer to (ISO 13297).
When the installation comply to this standard the "neutral"
and "ground" should be connected on the generating set
by connecting the blue (neutral) wire with the terminal on
which the yellow/green wire is connected.
A Ground Fault Circuit Interrupter (GFCI) or similar device
must be applied
WARNING
In all situations the transfer switches between
shore, inverter and generator should switch all
connections, the phase line (L) as wel as
neutral (N).
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. We
did refer to the Recreational Craft Directive that applies to
pleasure craft up to 24 m of length. Sometimes one has to
comply with other standards such as the rules of
certification societies like Lloyds Register of Shipping or
Veritas, regulations for the protection of personal, 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
negative point of the generating set start battery. When a
ungrounded DC system or positive grounded DC system is
applied the battery negative should not be connected to
the main ships ground.
EN / M-SQ6 / August 2010
Maximum single phase
output current
25 Amps
3 CABLE
For the power cable we recommend the use of 3 wire
single phase oil resistant cable with a sufficient cross
sectional area. One wire for earth is included. For long
cables it is recommended to apply cables with a larger
cross section (refer to ISO 13297 annex A)
4 TRANSFER SWITCH
A power source selector switch much be installed between
the generating set and the ship'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 shore (grid) power systems
separate.
Transfer switches - to switch over from shore to ship 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.
WhisperPower recommends the installation of a Mass
Systemswitch as the power source selector. This works
automatically when the generating set is not running the
input remains in the shore 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.
INSTALLATION
17