Technical data

Electrics
40
SUPPORT SERVICE
PLUG-IN SYSTEMS LIMITED PROVIDE AN
ON-CALL SERVICE FOR WARRANTY OR
NON-WARRANTY REPAIRS.
IF YOU WISH TO TAKE ADVANTAGE OF
THIS SERVICE FOR PLUG-IN-SYSTEMS
ONLY
Telephone [phone] and ask for
PRODUCT SUPPORT SERVICE.
HABITATION RELAY
To conform with European Safety Standards
(EMC) all caravans have been equipped with
a habitation relay.
This relay is actuated when the 12N/12S
plugs are connected to the car’s sockets and
the car ignition is turned on.
The relay automatically isolates all 12V
equipment within the caravan, excluding the
fridge’s 12V power supply, from the car.
GENERATOR GUIDELINES
• Lack of regular servicing can be the
cause of most generator problems,
gensets under 2kW are mainly dependent
on engine speed for output frequency
and voltage, poor or no servicing may
cause the engine speed governor to run
the genset engine too fast. Therefore
frequency and output voltage can rise
above the specification of the machine
data plate i.e. 240v at 50Hz, this may
cause damage to electrical/electronic
equipment (such as battery chargers).
• A generator should always be run for a
few minutes prior to connection with the
caravan or motorhome electrics, to allow
it to warm up and the output to settle to a
steady level.
• The AC output of generators is often
derived from an AC alternator, rectified to
DC then inverted back to AC. In essence
this means the output sinewave may not
be very smooth and may not run
sophisticated electronics efficiently. Some
of the new wave of gensets are more
sophisticated in their production of a
sinewave output and are more suited to
run electronic equipment.
• If in doubt consult your genset dealer or
manufacturer for advice.
ESM2000
The ESM2000 electrical Supply Module is a
240 volt ac and 12 volt dc power control
unit. It provides all the necessary features
for control of the electrics in a caravan. The
unit provides the following features:
Mains 240v ac - MAINS MODULE
with EARTH LEAKAGE PROTECTION
OVERCURRENT PROTECTION (RCD)
REVERSE POLARITY INDICATION
12 volt dc - FULLY AUTOMATIC
TRANSFORMER/CHARGER
with OVERCURRENT PROTECTION
SHORT CIRCUIT PROTECTION
- SWITCH & FUSE MODULE
with BATTERY CHANGEOVER SWITCH
CHARGER ON/OFF SWITCH
8 FUSED DC OUTPUT CIRCUITS
UNIT DESCRIPTION
Mains Module
The ESM2000 is designed to operate on a
mains supply of 207-253 volts ac (making it
ideal for use with low continental voltages).
The 40 amp RCD (Residual Current Device)
gives protection against earth faults and also
acts as the main switch. The mains module
also has three MCR's (Miniature Circuit
Breakers) which are basically resetable
mains fuses, to protect against overcurrent.
Allocation of the MCB's is as follows:
MCB1 - SOCKETS/FAN MASTER (if fitted)
MCB2 - CASCADE/LIGHTS (if fitted)
MCB3 - FRIDGE/CHARGER
Using a generator
When using a generator in conjunction with
the ESM2000 the following must be
observed, failure to do so may result in
damage to the unit: