Bus-Bar Modules

 The Bus-Bar modules are either with single phase or three phase enclosure. Three-phase enclosures are compact and have lesser eddy current
  losses. Single phase Bus-Bars are necessary to suit other components having single phase enclosures. The three Bus-Bars are conveniently
  staggered by a distance equal to centre spacing.
 The diameter of enclosure depends on rated voltage and internal clearance requirements.

 The main conductors are aluminum or copper tubes. The contact areas

 are silver plated. There is a provision of expansion joints which permits axial elongation at higher temperatures. The tubular conductors are
 supported on epoxy resin cast insulators Fig (13) the shape of insulators is such that the field distribution is uniform.

 The dimensions of conductor tubing depend upon the mechanical strength corresponding to short circuits forces. The size so obtained is generally
 adequate for carrying normal current without excessive temperature rise.

 

 

Bus-Bar dismantling principle

1 - Bus-Bar Disconnector

2 - Removable contact

3 - Bellows

4 - Bus-Bar conductor

Modular components fitted in Bus-Bar lengths and bays.

Depending upon particular local requirements, the following standard

elements are included in the assembly Fig. below.

(a) Lateral mounting unit.

(b) Axial length compensator (for Bus-Bars of straight length)

(c) Parallel compensator (for joint between Bus-Bars at an angle)

(d) Bellow compensator

 


Axial length compensator (for Bus-Bars of straight length)


1- L - unit (9o junction)


  2 - Four-way junction unit   


3- T-unit with flange for Earthing switch


4 - Angle unit (120 to 180 jaunaion )