The usual application for isolated phase bus is in power plants connecting the generator output to the main step up transformer.
Isolated phase bus duct design pdf.
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.
Welded continuous design bolted non continuous design 3.
Inadequate design improper inspection maintenance.
In the larger current ratings dry air is forced through the enclosures and within the tubular conductors for forced air cooling of the conductors.
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 isolated phase bus ipb.
Refer to table 11 1 7 table 11 1 10 for availability of csa listing.
Isolated phase bus is available for voltages ranging from 15kv through 38kv with ampere ratings up through 42 000 amps.
Metal enclosed bus duct designs isolated phase bus non segregated phase bus cable bus segregated phase bus.
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.
Failures due to other connected equipment ipb generator ct pt cabinets auxiliary or main xfmr.
Isolated phase bus duct ipbd is the main conduit for power distribution in a power generation facility.
Isolated phase bus one in which each phase conductor is enclosed by an individual metal housing separated from the adjacent conductor housing by an air space.
The ipb design has to fulfill all requirements relating to operational reliability and safety.
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.
Certain bus ratings can be supplied with csat listing.
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.
