Oil breakdown at large spacings

O. R. Schurig: The problem attacked by Mr. Miner, i. e., that of oil breakdown at large spacings of from 1 in. to 15 in. and more, and when subjected to sustained voltage stresses, is of real importance to engineers because (1) the gaps in high-voltage apparatus are commonly of the order of 1 in. or more and (2) because the voltage stresses for a good part of the time are of a sustained nature. The designers of oil-immersed transformers and circuit breakers must therefore take into account the behavior of oils between widely spaced gaps and under sustained voltage stresses. Mr. Miner´s data represent an advance of knowledge in this field.