Circuit breaker switchboard

A switchboard for mounting and supplying electrical power to a plurality of circuit breakers, said switchboard comprising:

• a frame including a center mounting pan, and at least first and second circuit breaker mounting pans engaging and supporting the rear end portions of said circuit breakers, said first circuit breaker mounting pan being selectively spaced from said center mounting pan so as to define an open area therebetween, and said second circuit breaker mounting pan being oppositely disposed with respect to said first circuit breaker mounting pan relative to said center mounting pan and selectively spaced from said center mounting pan so as to define an open area therebetween;
• and
• a power stack assembly mounted on said center mounting pan of said frame, said power stack assembly including first, second and third, substantially vertically disposed, elongated main bus bar members connected to a source of electrical power and releasably engaging said circuit breakers, said first main bus bar member being selectively spaced from said center mounting pan with insulator means so as to define a first ventilation passageway therebetween extending substantially the length of said power stack assembly, said second main bus bar member being selectively spaced from said first main bus bar member with insulator means so as to define a second ventilation passageway therebetween extending substantially the length of said power stack assembly, said third main bus bar member being selectively spaced from said second main bus bar member with insulator means so as to define a third ventilation passageway therebetween extending substantially the length of said power stack assembly, said power stack assembly further including a channel vent cover selectively spaced from said third main bus member with insulating means so as to define a forth ventilation passageway therebetween, each said first, second and third ventilation passageways defining an opening at the lower end of said power stack assembly and an opening at the upper end of said power stack assembly, and said forth ventilation passageway defining an opening proximate the lower end of said channel vent cover and an opening proximate the upper end of said channel vent cover, whereby convection air is allowed to rise within said first, second, third and forth ventilation passageways to cool said power stack assembly.

A switchboard for mounting and supplying electrical power to a plurality of circuit breakers, said switchboard comprising:

• a frame including first and second vertical front support channels connected by a plurality of horizontally disposed mounting channels, and including a center mounting pan secured to said mounting channels, and at least first and second circuit breaker mounting pans mounted on said mounting channels engaging and supporting rear end portions of said circuit breakers, said first circuit breaker mounting pan being selectively spaced from said center mounting pan so as to define an open area therebetween, and said second circuit breaker mounting pan being oppositely disposed to said first circuit breaker mounting pan relative to said center mounting pan and selectively spaced from said center mounting pan so as to define an open area therebetween, said center mounting pan being provided with a plurality of ventilation openings along its length;
• a power stack assembly mounted on said center mounting pan of said frame, said power stack assembly including first, second and third, substantially vertically disposed elongated main bus bar members connected to a source of electrical power and releasably engaging said circuit breakers, said first main bus bar member being selectively spaced from said center mounting pan with elongated insulator means so as to define a first ventilation passageway therebetween extending substantially the length of aid power stack assembly, said second main bus bar member being selectively spaced from said first main bus bar member with elongated insulator means so as to define a second ventilation passageway therebetween extending substantially the length of said power stack assembly, said third main bus bar member being selectively spaced from said second main bus bar member with elongated insulator means so as to define a third ventilation passageway therebetween extending substantially the length of said power stack assembly, said power stack assembly further including a channel vent cover selectively spaced from said third main bus bar member with insulating means so as to define a fourth ventilation passageway therebetween, each said first, second and third ventilation passageway defining an opening proximate a lower end of said power stack assembly and an opening proximate an upper end of said power stack assembly, and said fourth ventilation passageway defining an opening at a lower end of said channel vent cover and an opening at an upper end of said channel vent cover, whereby convection air is allowed to rise within said first, second, third and fourth ventilation passageways to cool said power stack assembly, said first, second and third main bus bar members each being provided with a plurality of ventilation openings for establishing air flow between said ventilation passageways;
• and
• an elongated, substantially vertically disposed neutral bus bar secured to said first front channel support, whereby said neutral bus bar is displaced forward from said power stack assembly to facilitate access to said neutral bus bar, said neutral bus bar being provided with a plurality of mounting holes along its length to facilitate selective positioning of operatively associated electrical connections and components.

A switchboard for mounting and supplying electrical power to a plurality of circuit breakers, said switchboard comprising:

• a frame including a center mounting pan and at least a first circuit breaker mounting pan selectively spaced from said center mounting pan, said center mounting pan and said circuit breaker mounting pan engaging and supporting rear end portions of said circuit breakers so as to define an open area between said center mounting pan and said first circuit breaker mounting pan whereby convection air flow is allowed to wash over back surfaces of said circuit breakers and heat radiated by said back surfaces is allowed to transfer to rearward structures of said switchboard;
• and
• a power stack assembly, having an upper end and a lower end, mounted on said frame, said power stack assembly including a plurality of substantially vertically disposed elongated main bus bar members connected to a source of electrical power and releasably engaging said circuit breakers, said main bus bar members being selectively spaced with insulator means therebetween such that ventilation passageways are defined between said main bus bar members, each said ventilation passageway defining an opening proximate said lower end of said power stack assembly and an opening proximate said upper end of said power stack assembly whereby convection air is allowed to rise within said ventilation passageways to cool said power stack assembly.