Transfer switch with neutral disconnect

摘要

A transfer switch panel including a bonded neutral connection to ground that allows the connection and disconnection of the utility neutral and an auxiliary power source neutral in one switching movement. The transfer switch panel includes a transfer switch connected to both a utility power source and an auxiliary power source. The transfer switch connects either the utility power source or the auxiliary power source to a pair of hot buses and a neutral bus contained within the transfer switch panel. The neutral bus includes a bonded connection to ground such that the neutral line of either the utility power source or the auxiliary power source is connected to ground when providing power to loads connected to a load center panel.

主权项

1. A transfer switch panel that selectively connects a load center to either a utility power source or an auxiliary power source each having a pair of hot lines and a neutral line, comprising:
a neutral bus contained within the transfer switch panel, the neutral bus being bonded to ground within the transfer switch panel; a pair of hot buses contained within the transfer switch panel; a first switch set contained within the transfer switch panel and operable to selectively connect the pair of hot lines and the neutral line of the utility power source to the neutral bus and the pair of hot buses in a first position and disconnect the neutral line of the utility power source from the neutral bus in a second position; a second switch set contained within the transfer switch panel and operable to selectively connect the pair of hot lines and the neutral line of the auxiliary power source to the neutral bus and the pair of hot buses in a first position and disconnect the neutral line of the auxiliary power source from the neutral bus in a second position wherein the first switch set includes a pair of hot switches and a neutral switch, wherein the neutral switch of the first switch set is positioned between the neutral line of the utility power supply and the neutral bus, wherein the second switch set includes a pair of hot switches and a neutral switch, wherein the neutral switch is positioned between the neutral line of the auxiliary power source and the neutral bus, wherein the pair of hot switches and the neutral switch of the first switch set move together and the pair of hot switches and the neutral switch of the second switch set move together; and a service disconnect breaker positioned within the transfer switch panel and positioned between the pair of hot lines from the utility power source and the first switch set.