Earthing and surge suppression concepts provide protection for people and equipment. Proper earthing establishes a reference point for voltage measurements and assists surge protection devices. It also helps transmit control signals and minimize electrical interference. Earthing involves connecting electrical systems to the earth to protect against injury, safeguard equipment via surge protection, and provide a reference point for voltage readings.

1. Topic 5: Earthing and surge suppression concepts

2. Topic 5: Earthing and surge suppression concepts
•Protect people against injury
•Provide a reference point for voltage and signal measurement
•Assist anti-surge devices to protect equipment from high voltages on
the line
•minimise some types of electrical interference
•transmit control signals between equipment

3. Topic 5: Earthing and surge suppression concepts
Fig 1: Earth Leakage Circuit Breaker

4. Topic 5: Earthing and surge suppression concepts
Fig 2: Earthed star point in a three phase electrical system