What is Electrical Noise?
Electrical noise essentially refers to unwanted high-frequency disturbances (or) interferences that affect an electrical signal. These disturbances can be transient, temporary (or) continuous in nature.
Types of Electrical Noise
Common Mode Noise
This type of disturbance happens across the electrical supply lines & the ground whether phase-to-ground or neutral-to-ground.
Normal Mode Noise
This disturbance exists between the phase and neutral (Phase + Neutral) lines.
Sources of Electrical Noise
Internal Sources
Generated within the system itself due to variables such as switchgear faults, defective electrical design, or inappropriate grounding.
External Sources
Originating from outside the system such as
- Lightning strikes,
- Electrical storms,
- Electromagnetic interference (emi)
from adjacent cables carrying high currents (or) radio frequency interference (RFI) from transmitters and communication equipment.
Impact of Electrical Noise
Electrical noise may distort (or) disrupt circuit operation leading to malfunctions, signal errors (or) even damage to sensitive electrical & electronic equipment.
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