Which of the following equipment provides surge protection in substations?
Lightning arrester
The question asks which equipment provides surge protection in substations. To answer this, let's review each option:
- Line Isolator: A line isolator is used for isolating a section of the electrical circuit for maintenance or fault detection. It does not provide surge protection.
- Lightning Arrester: A lightning arrester is a device used to protect electrical equipment from overvoltage transients caused by external (lightning) or internal (switching) events. It diverts the surge to the ground, thereby protecting the equipment.
- Main Busbar: A main busbar is used for the distribution of power in substations. It functions to distribute power and does not offer surge protection.
- Overcurrent Relay: An overcurrent relay is used to protect electrical circuits from currents exceeding the safe level, typically by isolating the circuit when overcurrent is detected. It does not provide surge protection.
Based on the above explanations, the correct answer is:
Lightning Arrester
In substations, lightning arresters are crucial for protecting electrical equipment from voltage spikes caused by lightning strikes or switching operations. This prevents damage to the equipment and ensures the reliability of the power system.
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