1. New Design & Re-Engineering Grounding System
Grounding System becomes a very critical part on very sensitive
equipment and valuable data within Telecommunication and Computer system. A good connection between equipment
to grounding rod doesn’t mean always a good grounding system, a correct configuration and isolation are needed to direct the lightning current
straight forward to the earth.
GlobalNine Indonesia offers a special protection with its natural concept of Isolated Grounding System.
Isolated Grounding System – Mesh and Star
Isolated Grounding System prevents any foreign current from and to the protected equipment due to its single reference of potential, so as it has no difference of potential inside the equipment.
ISOLATED GROUNDING CONCEPT
The Isolated Grounding System
with its Single Refference of Potential
obviously requires a fundamental concept , expertise and special material to deliver the specification.
Telecommunications equipment and computer system are sensitive parts
supposed to be protected like the illustrated apple and bird.
Conventional grounding configuration called
Integrated Grounding System is simple
configuration to protect insensitive equipment, not for
telecommunication and computer system.
Compare the difference with the illustration of
Isolated Grounding System.
When an existing
equipment have been protected by grounding system, however surge and
destruction still occured on the protected equipment, this means two
possibilities of cause: 1. Improper configuration design 2. Violation
to the original design. To solve the problem accurately, special
methode of
troubleshooting
is required.
2. Girdling
Effect.
The conductor of grounding system will react more as impedance than
a resistance to the surge and lightning current. When the system is
troubleshoot by measuring the resistance, it may appear to have a
low resistance, however it doesn't represent how high is the
impedance. A large conductor can have 10 times of ohmic of the
impedance than the resistance cause by the specific resistance
(Rho).
Another
effect of surge and lightning current is induction.
Huge lightning current (mild lightning current is about
3000-5000Amps) will induce another conductor arround it. When the
induced conductor is a closed path, it will react to oppose the direction of the lightning current, called
girdling effect.
this effect will increased the impedance of the grounding conductor.
To avoid the increasing impedance more than the allowed standard,
a special tools of calculation
is needed.
3. Upgrading the
Grounding Connection
Double Hole Lug.
GlobalNine Indonesia has its standard to any
interrnal connection of the grounding system with double hole
connection. The area of connection surface between lugs to the frame or
to the ground bar of the double hole lug upgrades the capacity to bring the amount of surge
and lightning current.
Single
Hole Lug Connection
Double Hole Bar and Double Hole Lug
Exothermic Welding.
GlobalNine Indonesia has its standard to any external connection of the grounding system with maintenance free connection, Exothermic Welding the Cadweld TM
The molecular Cadweld TM connection will deliver more current than the welded conductor and avoid corrosion as in the mechanical crimped connection
4. Surge
Arrester
Telecommunication system
and computer system provide networks that became
side and back door
of the grounding system. That means even small amount of current is
destructive enough for a sensitive part that coming in trough that back
door. When configuration and proper size of conductor and the impedance
have been design, to prevent and block the forreign current is by
providing a blocking device called arrester.
GlobalNine will provide the design of proper size and type of arrester
to be applied.<ps>
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