INSTALLATION
18
December 2016 / W-SQ20 / EN
1
FUSE
An output fuse (between the generating set and the
electrical installation) should be installed to protect the
installed electrical system.
For the W-SQ20 the maximum single phase current at
230V is 108 Amps. Using three phases the fuses should
be three times 36 Amps and mechanically connected. 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.
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 or 5 wire tri-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.
