A novel integrated vacuum tapping interrupter

By combining an OLTC and integrated interrupter into a single vacuum chamber, the development of the novel IVTI would be the potential a key role in application of distribution transformers which is the part of smart grid new market in the 21th centenary. The arc development model has been built for study and simulation with 6 statuses during the break operation. ANSYS 12.1 software was introduced to simulate the arc development model built using the optimised and selected locus. The result of the temperature map of contact surface and comparison of temperature tending curves has been used to explain the working phenomenon of IVTI at the extreme condition. In general, therefore, it could be said that the design parameters (particularly the cross section of the contacts) selected for IVTI are reasonable for distribution transformers. The latest development of the IVTI combines internal driving motor (reluctance or stepper type) and external resistors. It could easier increase the number of the steps and prevent extra thermal issues due to the larger current flowing though the transition resistors as well as getting higher rate for application of bigger transformers.