Abstract: A redundant variable-frequency drive (VFD) system including a first VFD and a second VFD each configured to receive an operational status signal from the other, the second VFD being configured to output a drive signal to a motor based on receiving an operational status from the first VFD indicating the first VFD is non-operational, a circuit protection module electrically connected to each of the first VFD and the second VFD, a mounting panel configured for mounting against a mounting surface, each of the first VFD, the second VFD, and the circuit protection module being configured to mount to the mounting panel in a vertically stacked configuration, and a housing configured to encase the second VFD and the circuit protection module against the mounting panel.

Abstract: The fire shield enclosure makes use of a set of external metal shields that can be attached to a wall mounted variable frequency drive (VFD) in the field either before or after the VFD has been installed for the purpose of providing adequate protection from a fire as defined by a UL2043: Fire Test for Heat and Visible Smoke Release (UL2043 fire test). The fire shield enclosure pertains to a VFD for which may use a polymer material as an integral part of its enclosure housing.

Abstract: The fire shield enclosure makes use of a set of external metal shields that can be attached to a wall mounted variable frequency drive (VFD) in the field either before or after the VFD has been installed for the purpose of providing adequate protection from a fire as defined by a UL2043: Fire Test for Heat and Visible Smoke Release (UL2043 fire test). The fire shield enclosure pertains to a VFD for which may use a polymer material as an integral part of its enclosure housing.