Rational reconstruction of sectioning posts of AC catenary at disconnectors
Operation of sectioning posts of the AC catenary at latory documents, such a reconstruction provides for the transfer the disconnectors on the Gorkovskaya railway for a period of more of the operation of sectioning posts from disconnectors to circuit than 60 years has shown its reliable operation, and the mainte-breakers. In connection with the reliable operation of the sectioning nance was reduced to a minimum. However, due to the growth of posts on disconnectors and the simplicity of their maintenance, it is heavy haul and high-speed traffic on a number of sections, their proposed to expand the options for the reconstruction of the secreconstruction was required. In accordance with the current regu-tioning posts on the disconnectors and to introduce three reconstruction options into the regulatory documents. The first option provides for the reconstruction of the sectioning post with disconnectors by transferring it to the classic scheme with four switches, as indicated in the current regulatory documents. The second option provides for leaving the sectioning post at the disconnectors, but adding a fast-acting automatic reclosing device in the inter-substation zone in case of passing short circuits. The third option provides for the reconstruction of the sectioning post on disconnectors with the introduction of a vacuum circuit breaker into the bus of the post and a device for high-speed automatic reclosing and opening of the disconnector, in the zone of which a short circuit has occurred. The schemes of automatic devices for determining a stable (passing) short circuit in a traction network and a device for determining the location of damage are considered. The operation of the sectioning posts, reconstructed according to the indicated options, has been tested practically at the existing sections of the power supply of the traction network of the Gorkovskaya railway. All of them have shown high reliability.