Power control system
AssigneeWatlow/Winona, Inc.
InventorsTheodore T. Von Arx, Robert A. Judd, Russell A. Schneidewind
Life of this patent
Estimating the term…
Abstract
A power control system in a DIN rail mount assembly for switching power in a low cost, compact, and solid state for controlling electric heaters. The system can be used for single phase, three phase-two leg, and three phase-three leg. Current switching capabilities range from 30 A to 50 A. Variable time base, 4-20 mA process control or VAC/DC input contactor configurations can be utilized. The DIN Rail back plate includes a sliding mechanical configuration. A potting fence provides for potting of the electrical substrate and also provides a heat sink. A large cover covers finger palm safer terminals. The DIN rail assembly can also be used for supporting electrical, electromechanical, optical or other types of assemblies.
Claims14
A power controller for an electrical resistance heater, the power controller comprising:
- a heat sink defining a front side, a rear side, a top end, and a bottom end;
- power control circuitry disposed at said front side of said heat sink;
- and
- a DIN rail mounting assembly disposed at said rear side of said heat sink, said DIN rail mounting assembly including:
- a back plate defining a front face and a rear face, said front face positioned adjacent said rear side of said heat sink and adapted to be slidably received onto said heat sink, said back plate including a pair of rail capture tongs disposed on said rear face, a configured recess disposed in said front face, and a configured opening disposed within said recess;
- and
- a slider disposed in said recess and limitedly movable therein in response to mounting on a DIN rail, said slider held between said recess and said rear side of said heat sink, and including a rail capture prong adapted to extend through said configured opening;
- wherein a top portion of a DIN rail is retained by said pair of rail capture tongs, and a bottom portion of the DIN rail is releasably retained by said rail capture prong.
A power controller for an electrical resistance heater, the power controller comprising;
- a heat sink defining a front end, a rear end, a top end, and a bottom end;
- a DIN rail mounting assembly disposed at said rear end of said heat sink, said mounting assembly including a back plate received on said rear end of said heat sink, said back plate including a configured recess with an opening therein and a DIN rail capture tong and a plastic slider having a shape as that of said configured recess, including a DIN rail capture prong adapted to extend through said opening, said DIN rail capture tong and said DIN rail capture prong cooperating to resiliently and releasably capture a DIN rail;
- and
- power control circuitry disposed at said front end of said heat sink.
Dependencies are inferred from the claim text.