Stormin Protection Products
Inc. 10749 63rd Way N. Pinellas Park, FL. 33782 Toll Free: 1-888-471-1038 Phone: 727-548-5418 Fax: 727-548-0867
This is a classic ground loop that needs to be
corrected. In order to correct this
and give the customer what he or she wants from this CCTV setup, we need to
get rid of the ground loops. The
definition of a ground loop is more then one ground. From what I see is, every camera, and
both buildings have different grounding potentials. If lighting hit near by building 8, the
impulse will come up the building ground 8, and go through all the
equipment in this building, travel down the BNC shield and coax and blow
everything in building 10 and out the building 10s’ ground. If lightning hit near building 10, all
this would happen in the opposite direction. Page 2 of this recommendation
will give you an itemized list of products you need.
We have protected every thing in building 8 and building
10. We have eliminated the ground
loop, and as far as the two buildings think, there is no CCTV. Lightning can not see a path of least resistance
to travel through the CCTV system. Other important ideas:
Isolated the cameras from physical ground using wood, Plexiglas or
rubber. Do not ground any of the
cameras by means of a ground wire.
I see the camera has the ability for audio, if not using it, do not
hook up the wires. If you plan to
use the audio, we need to provide a protector for that as well. At building 10 you have a ground isolation transformer
for the coax. Install the BNC surge
suppressor before the isolation transformer. No arcing will happen on this line so long as this protector
is install this way. All prices shall be discussed with Alarm Guard Security
Services. As a professional in the field of Power Quality
Engineering, this is the only way you will correct the problem you
currently have. Silent Witness has
recommended that Alarm Guard Security Services contact me to suggest the
best possible way to eliminate this problem. I offer no 100% full proof guarantee that this will work, but
I will say this will limit your damage to next to nothing. I believe you will find that next year,
about this time, you will discover that no damage has accrued in 1999. Thank you John E. Pecore President
I recommend that building 8 have: A: (2) LI
1500-G isolation transformers 1.
One located in the Command Center, with all of the command center equipment
plugged into it. 2.
One located at the reception desk, with the monitor plugged into it. B. (2)
3NF AC high energy surge suppressors. 1.
One located in the Command Center, and the isolation transformer plugged
into it. 1.
One located at the reception desk, and the isolation transformer plugged
into it. (note:
these surge suppressors are designed to deal with the arc problem at 2000
volts at 200 amps. These units were design to handle 6000 volts at 3000
amps. It is safe to say, no arcing
will be a problem.) C. (10)
CCTVBNC C/V coax surge suppressors. 1.
Safe to say, these devices will be install on the two outside cameras and on
the Mux and A/B out. I recommend
that building 10 have: A: (2)
LI-50-G isolation transformers 1.
One location at the altronix power supply plugged into the isolation
transformer. 2.
One location at the reception desk and the monitor plugged into it. B: (2)
3NF AC high energy surge suppressors. 1.
One located at the altronix power supply and the isolation transformer
plugged into it. 2.
One located at the reception desk and the isolation transformer plugged
into it. (note:
same reason as Item B for building 8) C. (6)
CCTVBNC C/V coax surge suppressors 1.
One BNC surge suppressor for every camera and one monitor.