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Electrical Earthing System is all about connecting electrical setups to the ground for safety and reliability. This category covers how earthing works, why it prevents shocks and equipment damage, and the basics of setting it up. Whether you’re new to the topic or looking to brush up, we offer clear, easy-to-follow info to help you grasp this key part of electrical safety.
In this article, we will focus on double pressure type SF6 circuit breakers and single pressure type SF₆ circuit breakers. The double-pressure-type SF6 circuit breaker is an obsolete technology, previously used in substations, whereas the single pressure type SF₆ circuit breaker is the modern design of circuit breakers. A single pressure type SF6 circuit breaker … Read more
Single-core cables are the most commonly used cables for underground high-voltage transmission systems. This is because 3-core high-voltage transmission cables, mainly above 33kV, are not easily transportable due to their very thick insulation and weight. A single-core cable is lighter than a three-phase or 3-core cable. The insulation of these single-core cables is covered with … Read more
Measuring soil resistivity is essential before designing a grounded earthing system for a substation because it determines how well the ground can dissipate fault currents. If the soil resistivity is high, the grounding system needs more dense earthing mesh and more number of conductive electrodes to ensure proper safety. A well-designed earthing system prevents intolerable … Read more
Sheath Voltage Limiters (SVL) As I have already told, in high-voltage cables, the metallic sheath plays an important role in protecting the conductor from external physical, environmental and electromagnetic influences. But due to electromagnetic induction of the current flowing through the main conductor, a voltage is developed along the sheath, especially in long cable runs. … Read more
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