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Instructions
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EC
60
0
EC600 Power Control System
Issue 2.3
Page 6 of 20
10
th
August 2017
3 System Technical Information
The following section provides further technical information relating to the electrical system. You can
also access the supporting technical manual from
3.1 Residual Current Device & Miniature Circuit Breakers
Residual Current
Device (RCD)
Miniature Circuit
Breakers (MCB’s)
RCD
Test
button
The Residual Current Device (RCD) is
basically provided to protect the user from
lethal electric shock. The RCD will turn off
(trip) if the current flowing in the live
conductor does not fully return down the
neutral conductor, i.e. some current is
passing through a person down to earth or
through a faulty appliance.
To ensure the RCD is working correctly,
the test button should be operated each
time the vehicle is connected to the mains
supply (see section 2.3)
The Miniature Circuit Breakers (MCB’s)
operate in a similar way to traditional fuses
and are provided to protect the wiring
installation from overload or short circuit.
If an overload occurs the MCB will switch
off the supply. If this occurs you should
investigate the cause of the fault before
switching the MCB back on.
The following table shows the rating and circuit allocation for the three MCB’s
MCB
Rating
Output Wire Colour
Description
1
10 Amps
White
230V Sockets
2
16 Amps
White (Yellow for heater)
Extra 230V Sockets / Heating System
3
10 Amps
Black (Blue for Whale water
heater)
Fridge / Charger / Auxiliary devices /
Whale Water Heater
3.2 Generator Usage
Caution should be used before connecting a generator to your caravan or motorhome.
WARNING
Never start or stop the generator while electrical loads are connected and switched on. Start the engine, let
it stabilise and then connect the electrical load. When stopping the generator, disconnect the electrical load
and let engine stabilise before switching off.
Whilst some generators use electronic inverter technology, others use a more basic principle to
generate the 230V supply. Preference should be to choose a generator which produces a consistent
sinusoidal wave form with accurate voltage control.
The Reverse Polarity warning light on the PSU may illuminate when using a Generator. This is a
normal side effect when using some types of generator. Instead of connecting the neutral conductor to
earth, some generators centre tap the earth connection making both neutral and live conductors 110V
above earth. This 110V difference causes the neon polarity indicator to illuminate.
In most cases it is safe to use a generator, but please consult the generator handbook for further
information.
