INSTALLATION
EN / W-SQ6/8/12/16 for mobile applications / December 2016
23
2.5.5
AC power system (230 Volt)
The electric power supplied by the generator
is of a high voltage and dangerous to people.
Before working (installation) on the system
read the sections on safety in the users
manual.
Realise hat people are not used to have 230V
available on a vehicle. Put warning signs on
wall sockets and on junction boxes. Instruct
non-regular users of the vehicle. Warn
maintenance personal of garages that do
service on the vehicle.
Generators used on vehicles that are
operated in a hazardous environment have
often to fulfil special regulations and additional
measures have to be taken accordingly.
Be sure that all electrical installations (including all safety
systems) comply with all required regulations of the local
authorities. All electrical safety/shutdown and circuit
breaking systems have to be installed on-board as the
generating set itself cannot be equipped with such
equipment for every possible variation.
The vehicle
’s power supply system should be suitable and
safe for the AC voltage which is applied and the power
that will be generated. Special attention has to be paid on
dividing the system in branches which are fused
individually.
It is absolutely essential that each and every circuit in the
electrical system is properly installed by a qualified
electrician.
1
FUSE
An output fuse (between the generating set and the
electrical installation) should be installed to protect the
installed electrical system. The following maximum single
phase output current applies:
Model
Maximum single phase
output current
W-SQ6
25 Amps
W-SQ8
35 Amps
W-SQ12
52 Amps
W-SQ16
70 Amps
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 connec
tion between “neutral” and “ground” is
necessary as part of a specific insulation failure protection
system.
It is possible that the electric installation in the vehicle
must be protected against insulation failures. Methods of
protection are subjected to rules that can be different
depending on the use of the vehicle and local standards.
Experts in this field should be consulted.
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 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 shore (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.
WhisperPower
recommends
the
installation
of
a
WhisperSwitch 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 WhisperSwitch switches
automatically after 10 seconds delay time over to the
generating set position.
In all situations the transfer switches between
land line, inverter and generator should switch
both neutral and L1. Of course this is the case
when using a WhisperSwitch.
