Most issues around power quality are the result of incorrectly configured electrical systems. Keep an eye out for short circuits between neutrals and your grounding network, which often create disturbances in power quality, causing the devices connected to your power system to malfunction.
This problem occurs when part of the return current in the neutral conductor flows through grounding conduit and conductive parts of the building, and back to the service entrance. This current, called an earth leakage current, can generate a range of issues, including:
⦁ Creating noise in the electrical system that often enters devices’ grounding circuits, causing them to malfunction.
⦁ Strong, stray magnetic fields that may negatively affect the adjacent electrical equipment in your building.
⦁ Major voltage differences between separate grounding points, which could be extremely dangerous.
It is extremely important to protect the people in your building against possible electric shock. Electric shock can occur as a result of either direct contact with ‘live’ conductors, and via indirect contact (via metal enclosures during short circuit conditions).
Inadequate earth leakage protection exposes the people working in your business to the risk of electric shock, which poses a range of risks relating to severe injuries and even death.
An Earth-leakage circuit breaker is a safety device used in electrical installations with high Earth impedance to prevent shock. It detects small stray voltages on the metal enclosures of electrical equipment, and interrupts the circuit if a dangerous voltage is detected.
An electric current passing through the body will cause electric shock and/or electric burns. The strength of the current is dependent on factors such as frequency, voltage and body- and contact-impedance. Another major factor affecting electric shock and electrical burns is time since the length of time in which an individual is exposed to an electrical current determines how much damage can be caused to body tissue, clothing, jewellery, etc., as well as the extent of lasting damage once contact with the current is terminated.
The prime requirement of any rules for electrical installations is to ensure that people, animals and property are protected from hazards that can arise from the operation of an electrical installation under both normal and fault conditions.