| 摘要 |
A switchboard (10) for mounting and supplying electrical power to a pluralit y of circuit breaker (14). The switchboard comprises a frame (16) including a center mounting pan (46), and at least first and second circuit breaker mounting pans for en. gaging and supporting the rear end portions of the circuit breakers. The switchboard also comprises a power stack assembly (12) mounted on the center mounting pan of the frame. The power stack assembly includes first, second and third, substantially verti- cally disposed main bus bar members (52, 54, 56) for being connected to a source of electrical power and for releasably engaging the circuit breakers. The power stack assembly further includes a channel ve nt cover (30). Further, in the preferred embodiment the center mounting pan and the main bus bars are provided with ventilation openings (50) along their lengths to further facilitate airflow through the power stack assembly.
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