Due to the higher operating voltages and possibility for fault currents, double earthing is especially important for 3-phase machinery and equipment. The additional earthing path facilitates in the effective dissipation of fault currents, reducing the danger of equipment damage & fire threats.
For three-phase machines and equipment, double earthing, often known as “equipment earthing” (or) “protective earthing,” is essential for various reasons:
3). Compliance of regulations
4). Reduce electromagnetic interference (EMI)
5). Fault Tolerance
Double earthing adds an extra layer of security. High voltages & currents can be present in industrial environments where three-phase machinery are routinely used. If the system experiences a breakdown or a surge, having two distinct grounding lines can ensure that the excess current is efficiently routed, lowering the danger of electric shocks to the operators & damage to the equipment.
Having two distinct earthing pathways decreases the possibility of a single point of breakdown. If one earthing path becomes corroded, damaged, or otherwise compromised, the second line remains intact, providing continuing protection.
Electrical codes and standards frequently require double earthing for the specific types of gear, particularly in industrial or commercial environments. Following these guidelines assures compliance and helps in the prevention of accidents.
Proper grounding can aid in the reduction of EMI, which can impair the operation of the sensitive electronic equipment. Double earthing may increase grounding’s effectiveness in preventing interference and assuring the proper operation of machinery & equipment.
In the case of a fault or a short circuit, double earthing can assist in quickly dissipating excess current, preventing equipment damage and minimizing downtime.
Double earthing entails making redundant connections to the ground, which creates more protection for both the equipment & the people working near it.
In conclusion, double earthing is an important safety technique for 3-phase machinery and equipment, offering more protection against the electrical shock dangers and ensuring the earthing system’s stability.