Marine Galvanic Isolator GI70
Installation:
1.
Remove the external AC power cord from the shore power AC inlet socket.
2. Locate the green (or sometimes yellow&green) earth wire immediately behind the AC
inlet socket (this is the wire leading from the large pin) and cut the wire at a convenient
point. It may be necessary to remove the outer sheathing of the 3 core cable to find the
green wire.
Please ensure the other two cables are not damaged in any way when
you remove the sleeving.
3. Connect one end of the green cable to the screw terminal of the isolator and the
other green wire to the other terminal (either way round: the isolator works in
both directions).
4. Mount the isolator in a well ventilated position (minimum 4” airspace around the unit)
away from inflammable materials and preferably on solid wood or metal battens (not
directly on g.r.p.)
:
In
extreme fault conditions
the unit
may
become hot for a short
period before the trips operate (milliseconds!) so a little extra care in mounting is
essential. Regular inspection is recommended so mount in an easily accessible
position for testing.
It may be necessary to mount the isolator away from the AC inlet socket: Simply remove
the green earth wire from the rear of the socket & fit a new piece of earth cable(green
min 4mm) & connect this cable to one terminal of the isolator. Continue from the other
terminal with green cable to the brass earth strip on the mains distribution outlet.
GALVANIC ISOLATOR
GREEN
MAINS DISTRIBU-
TION INSIDE BOAT
(Earth Terminal)
GREEN
SHORE POWER
INLET SOCKET
Bulkhead Mount
Red or
Brown
Blue
The function of this isolator in the ground circuit can be critical to safety. If you are
not confident in your ability to install this unit please seek professional help.
pg_0002
Testing installation
Specification
Supplied by I.E.S. Leeds UK.
Tel: 0113 2 774747/2711858
Fax: 0113 2 774797
E-mail: here@instantelectronics.freeserve.co.uk
v.a.t. 301.1670.17
This unit is a solid state device constructed with high grade components and requires
no servicing. Testing can be carried out with a simple multimeter as follows:
Remove the mains input cable to disconnect the AC Supply
to the vessel.
With a digital multimeter set to the OHMS position connect the probes to either terminal
of the isolator and note the reading. Now reverse the probes:
The meter should show a similar reading within 12% in both directions. If your meter
has diode check facilities performing the same operation will result in a reading of
approx 0.9 volt in both directions. Any
significant
difference between the two readings
indicates component failure. An ohms reading of “infinity”or “zero” would indicate failure
of the isolator : Refer to manufacturer.
Should the isolator become warm after initial connection, this indicates conduction of
the internal diodes resulting from defective mains shore power or internal wiring fault.
Under these circumstances please remove the mains shore power lead and consult a
qualified electrician. To ensure continued protection we recommend performing this
quick test on a regular monthly basis together with checks on the shore power / vessel
rccd test facility.
Solid State Construction. Isolated Heatsink. Epoxy sealed
Suitable for use with rccb protected shore power outlets of 30 & 50 amps.
Operating Range 0.9 -250 volts AC/DC. 70 Amps RMS. Peak 400 Amps.
No user replaceable components.
12 months warranty subject to correct installation and operating conditions.
Liability limited to replacement of operating unit only. The manufacturers do not accept
responsibility for injury or loss sustained through incorrect installation or operation of this
unit, defective shore power or faulty mains/dc installations on board the vessel.