Electrical bonding is a process in which parts of an electrical circuit assembly or sub-modules within a system are connected electrically by their joints or by any low-resistance bonding media (Jumpers).
What is Electrical Bonding?
The main purpose of electrical bonding is to make a homogeneous structure with respect to the flow of radio frequency (RF) current so that it would experience the minimum barrier as it crosses one surface to the other without developing electrical potential at the crossover point. Bonding to electrical earth is used extensively to ensure that all conductors (Person, surface, and product) are at the same electrical potential. When all the conductors are at the same potential then no discharge will occur.
Electrical bonding requirements
In order to ensure electromagnetic compatibility (EMC) specification the various components of a module or all the modules of the system are connected to a common chassis or common reference ground via low impedance electrical path that should provide non-zero impedance at all frequencies. This kind of bonding provided to meat EMC specifications are known as EMC Bond and the process is known as EMC Bonding.
[ ##eye## Notch filter- Theory, circuit design, and Application]
Good bonding is required for mounting line-filter modules on the chassis that serves as a drain for EMI currents, or for connector shells to equipment enclosures to ensure shielding integrity of cable shields that are terminated on these connectors, or for ensuring shielding integrity over seams and joints to avoid leakage of RF energy.
The main purpose of electrical bonding is to prevent voltage difference between two parts being joined.
Why Electrical bonding is important?
Residential swimming pools can also be susceptible to touch potential differences, especially when water meats metal surfaces. Metal parts of pools, hot tubes, and fountains must be bonded to earth to reduce the risk of electrical shock to anyone who might come in contact with these surfaces, especially when the humid environment increases the chances of providing a path to the ground through a person’s body.
Types of Electrical bonding
[ ##eye## Fundamentals of Electrical Energy]
To reduce the above problem a radical approach is required if the bond is to work at high frequencies. The most effective method is to divide the bonding process into two categories as Mechanical bonding and Electrical bonding.
1. Direct Bonding:
2. Indirect Bonding:
Electrical bonding of Earth wire
[ ##eye## Surge impedance loading (SIL) of Transmission line]
Electrical bonding behavior at RF
![]() |
Electrical bonding behavior at RF |
This circuit acts as a parallel resonance circuit. So the circuit provides very high impedance at higher frequencies. Due to the skin effect at a higher frequency, there becomes a flow of current via the outer surface of the conductor. Hence due to this, the bond offers very high resistance in the circuit.
very good....
ReplyDelete