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Pro
Protect
www.sterling-power.com
www.sterling-power-usa.com
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 it’s
extremely high voltage and extremely
low duration. The device will simply do
its job and protect the alternator. The
warning is more for a long term voltage
fault. I.e. if the alternator’s own
regulator fails for normal reasons and
the alternators voltage rises the LED
will simply warn of the high voltage at
the alternator, this device cannot
actually stop the high voltage
occurring.
Designed and developed in England
Sterling Power Products
Warranty:
2 year return to factory
conditional warranty
RoHS
compliant
Alternator open circuit protection unit
and high voltage alarm relay
12 v
24 v
The
is a highly effective alternator protection device which prevents high
voltage back EMF spikes destroying your alternator’s expensive regulator and internal
diode pack. The
prevents extreme damage occurring to your main and
auxiliary system devices. Most common faults which cause this problem are:
1) Loose wires causing an alternator wire to become undone / loose causing sparking.
2) Failure in a split diode/relay charging system, open circuiting this system.
3) Someone switching off engine’s electrical power when engine is actually running.
4) Defective rotary battery selection switch causing arcing during rotation.
5) Failure of a fuse if fitted in the alternator’s circuit.
All 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.
Pro Protect
Pro Protect
Most alternator regulators and internal diode
packs will be damaged by spikes in excess of 40V. The
is designed to absorb
spikes in excess of 18V (12V) and 36V (24V systems).
Pro Protect
Installation:
Simply connect the positive / negative output connection from the
to the positive / negative output of the alternator. It’s
always best to connect the
ring terminal to the inside of the bolts of the alternator’s main power cables. I.e. there will
already be the main alternator outputs on the alternator’s stud. For maximum protection remove the main cables and place the
protection device on the bolt shaft first, then add 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
cable is on top of the live cable (not held in by the live cable) then, when the
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
wires are fitted the more possible events it can protect for.
(N.B we do not supply any cables with the
we recommend the use of a 10A cable (place
as near to alternator
as possible)
Pro Protect
Pro Protect
,
Pro Protect
Pro Protect
Pro Protect
Pro Protect
Pro Protect
IP68
Waterproof
RoHS
compliant
www.sterling-power.com www.sterling-power-usa.com
Designed and developed
in England
manufactured in Taiwan
Alternator open circuit protection unit
LED Warning :
High voltage activated at alternator
12 volt
24 volt
+
+
-
+
+
-
IP68
Waterproof
To
Batt Pos
Neg
+
+
Relay :
closed
for alarm
+
-
Light /
Buzzer
Model
Sterling
Alarm relay 1A, max current 1A
max voltage 48V
Fuse
Use a 5 amp fuse in the control lines
F
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+ +
-
+
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www.sterling-power.com
www.sterling-power-usa.com
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