How To Make The Telecom Earth - Matrix Telecom SARVAM UMG System Manual

How to Make the Telecom Earth

The Earth (Ground) is the most important safety procedure to prevent electrical shocks and fires. It protects from
lightning strikes, electrical transients, static discharges, electromagnetic interference and electrical hazards.
A proper earth must be in place to protect people and the system. The following explanation shows how a perfect
electrical earth can save lives.
P
Electrical Parts of the Gadget
A.C. Input
N
Enclosure of the Gadget
In the above diagram, Vc = VS *Z2 / Z1 + Z2
Where,
• Z1 is the stray impedance between the electrical parts of the Gadget and the Chassis.
• Z2 is the stray impedance between the Chassis and the Earth.
• If Z2 = 0 then VC = 0
This formula implies that if the impedance between the Chassis and the Earth is reduced to 0 then the Voltage on
the Chassis, that is, VC, would be Zero and hence any person touching the enclosure will not get an electric shock.
Hence Z2 should be made Zero.
This can be done by providing a perfect earth to the electrical equipment.
It is recommended that you provide a dedicated earth for the ETERNITY GENX/any other telecom equipment. This
dedicated earth is called the Telecom Earth (Ground).
Providing a separate Telecom Earth to the telecom equipment eliminates the possibility of any back-voltage on the
earth.
CO Line
Lightning
Protectors
Matrix SARVAM UMG System Manual
Vs
Z1
CO Line
System
Protective Earth
Terminal
Telecom Earth
Vc
Z2
Earth
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