Isolated Phase Bus Duct Design Pdf

With current carried between the generator and a step up transformer solely via the ipbd system it is the indisputable critical core of any power generation operation.

Isolated phase bus duct design pdf.

The bus may be self cooled or may be force cooled by means of circulating a gas or liquid. The isolated phase bus ipb. Metal enclosed bus duct designs isolated phase bus non segregated phase bus cable bus segregated phase bus. The usual application for isolated phase bus is in power plants connecting the generator output to the main step up transformer.

Refer to table 11 1 7 table 11 1 10 for availability of csa listing. Isolated phase bus ducts ipb the ipb a high current connection between generators and step up transformers is a key component to transfer electricity to the power grid. The ipb design has to fulfill all requirements relating to operational reliability and safety. 3 phase in one physical block one of the most compact medium voltage busducts especially suitable for harsh environments copper or aluminum conductors are available no earth bar is required due to cast resin insulation instead of a metal enclosure technical data mv r mb medium voltage busduct 3 6 to 7 2 kv 165 h 310 50 l1 l2 l3 165.

Welded continuous design bolted non continuous design 3. In the larger current ratings dry air is forced through the enclosures and within the tubular conductors for forced air cooling of the conductors. Inadequate design improper inspection maintenance. System configurations optional ground bus optional ground bus optional ground bus optional ground bus optional ground bus optional ground bus three phase three wire 1200 3200 a 635 v 5 15 kv three.

The main bus and its enclosure is normally in a tubular form in view of the inherent advantages of a tubular figure 31 2 a layout of 24 kv 20 ka isolated phase bus duct from generator to generator transformer for ntpc neutral grounding transformer grating concrete floor vt s surge protection cubicle bellows assembly with seal off bushing. Failures due to other connected equipment ipb generator ct pt cabinets auxiliary or main xfmr. Certain bus ratings can be supplied with csat listing. Isolated phase bus duct ipbd is the main conduit for power distribution in a power generation facility.

Isolated phase bus is made in ratings from 3000 amperes to 45 000 amperes and rated for voltages from 5000 volts up to about 35 000 volts.