Technical information

44
Chapter 3 CARAVAN SERVICE SYSTEMS
The unit gives overload and earth leakage protection for the 230v electrical
supply in your caravan.
For normal operation all switches on the unit need to be in the ON position.
The switches on the left of the unit are known as M.C.B.’s (miniature
circuit breakers).
These take the place of the conventional fuse but are more convenient.
In the event of a fault the M.C.B. ‘trips’ i.e. automatically moves to the
OFF position.
After elimination of the fault the M.C.B can be re-set by switching to the
ON position. (Against the spring pressure in an upwards direction).
If an earth fault develops or a person was to touch a live piece of equipment
the leakage of current to earth should immediately operate the RCD
(residual current device) and ‘trip’ the main switch, to the OFF position.
This switch is only re-settable after elimination of the fault.
To re-set, operate the switch as for M.C.B’s.
Every time you connect to a site supply the RCD should be checked by
operating the test button marked ‘T’. The unit should immediately switch
to the OFF position. If the unit does not switch off then a qualified
electrician should be consulted.
If the unit does switch off, the test is complete and the switch can be re-
set restoring the supply back to normal.
Caution: Having too many appliances switched on at the same time will trip the
MCB. This is a safety measure.
Warning: It is essential that connections are made exactly as shown. If
terminal markings are not in accordance with the diagram they must
be ignored. If in doubt consult a qualified electrician.
THE ELECTRICAL SYSTEM – 230 VOLT (continued)