Corona loss refers to a phenomenon that occurs at ____ voltages.

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Multiple Choice

Corona loss refers to a phenomenon that occurs at ____ voltages.

Corona loss happens when the electric field around a conductor is strong enough to ionize the surrounding air. That level of field requires high voltages, so corona is a high-voltage phenomenon. When the air ionizes, energy is wasted as current in the ionized gas, producing a visible glow, noise, and sometimes radio interference. The onset voltage for corona depends on factors like conductor size, surface condition, and weather, which is why we describe it as something that appears at high voltages rather than at low or medium levels. Very high voltages can also exhibit corona, but in practical terms it’s categorized by the high-voltage condition, making that the best descriptor for when corona loss occurs.

Corona loss happens when the electric field around a conductor is strong enough to ionize the surrounding air. That level of field requires high voltages, so corona is a high-voltage phenomenon. When the air ionizes, energy is wasted as current in the ionized gas, producing a visible glow, noise, and sometimes radio interference. The onset voltage for corona depends on factors like conductor size, surface condition, and weather, which is why we describe it as something that appears at high voltages rather than at low or medium levels. Very high voltages can also exhibit corona, but in practical terms it’s categorized by the high-voltage condition, making that the best descriptor for when corona loss occurs.

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