12V or 24V
Alternator Open Circuit
3.5-L * 3.5-W * 2.3-H in
90 * 90 * 60 mm
0.5 lb / 0.25 kg
Year Manufacturer's Warranty!
Features of the 12V or 24V Alternator Open Circuit Protection
alternator from massive spikes caused when a cable is loose or a fuse blows.
safe emergency route for that spike to be discharged giving full protection to
the alternator’s regulator.Does
not carry the main current so only light wiring is required
with any alternator or splitting device (12V or 24V).
The 12V or 24V Alternator Open Circuit Protection Device is a
highly effective alternator protection device which prevents high voltage back
EMF spikes from destroying your alternator’s expensive regulator and internal
diode pack. The 12V or 24V Alternator Open Circuit Protection Device prevents
extreme damage occurring to your main and auxiliary system devices. Most common
faults which cause this problem are:
wires causing an alternator wire to become undone/loose causing sparking.
in a split diode/relay charging system, open circuiting this system.
switching off engine’s electrical power when engine is actually running.
rotary battery selection switch causing arcing during rotation.
of a fuse if fitted in the alternator’s circuit.
All of the above events could easily destroy your alternator’s
sensitive parts, this device will prevent this by diverting any high spike
build up to earth. This is effective from full power to no power fault events
on the alternator. Most alternator regulators and internal diode packs will be
damaged by spikes in excess of 40V. The 12V or 24V Alternator Open Circuit
Protection Device is designed to absorb spikes in excess of 18V (12V) and 36V
(We do not supply any cables with the 12V or 24V Alternator Open
Circuit Protection Device, we recommend the use of a 10A cable (place device as
near to alternator as possible)
Simply connect the positive/negative output connection from the 12V
or 24V Alternator Open Circuit Protection Device to the positive/negative
output of the alternator. It’s always best to connect the device ring terminal to
the inside of the bolts of the alternator’s main power cables. There will
already be the main alternator outputs on the alternator’s stud. For maximum
protection remove the main cables after (thus sandwiching in the protection
cable). If the tensioning nut on the main cable becomes loose the main cable
will fall off first leaving the protection device on the alternator, this will
save the alternator. If the 12V or 24V Alternator Open Circuit Protection
Device cable is on top of the live cable (not held in by the live cable) then,
when the device cable falls off, the alternator will not be protected.
In the event there are no nuts then it’s up to the installer to
connect the wires as close as possible to the alternator’s main power output.
The closer the 12V or 24V Alternator Open Circuit Protection Device wires are
fitted the more possible events it can protect for.
The red LED (high voltage warning) will illuminate if alternator
voltage is between 16.0 to 16.5V and over (12V unit) or 32.0 to 33.0V and over
(24V unit). WARNING only given for high voltage at alternator, this is an event
we cannot protect for. If this WARNING is given, the engine should be shut down
immediately and should be investigated and the high voltage source should be
identified and rectified. In the event of spike protection being engaged there
is no event LED to indicate this due to its extremely high voltage and
extremely low duration. The device will simple do its job and protect the
alternator. The warning is more for a long term voltage fault. If the
alternator’s own regulator fails for normal reasons and the alternator’s voltage
rises, the LED will simply warn of the high voltage at the alternator, this
device cannot actually stop the high voltage from occurring.