Electrical designer needing help with a wiring diagram for the following. Instead properly understanding location of control and mode of control can solve the issue.
Lessons In Electric Circuits Volume Iv Digital Chapter 6
Hoa wiring diagram. 75hp motor 150a hmcp breaker an engineer speced out the mcc bucket. Presently there is a 30 hp motor hoa wiring help. In this lesson well examine a common industrial application of 2 wire control circuits known as a hand off auto circuit. Hand off automatic controls recognize hand off automatic switches on a schematic diagram. Wiring diagrams sometimes called main or construc tion diagrams show the actual connection points for the wires to the components and terminals of the controller. Hand off auto hoa controls are a very common and versatile control circuit which allows both automatic and manual operation.
They show the relative location of the components. The circuit shown in figure 271 permits a motor to be operated by a float switch or to be run manually. It allows loads such as motors solenoid valves electric cylinders etc. Figure 1 is a typical wiring diagram for a three phase mag. To be controlled by some automatic operation such as a sensor or plc plus allows you to easily turn the load on manually or off manually. A wiring diagram shows as closely as possible the actual location of all component parts of the device.
Hand off automatic controls are used to permit an operator to select between automatic or manual operation of a motor. The switch is shown as a single pole. The open terminals marked by an open circle and arrows represent connections made by the user. They can be used as a guide when wiring the controller. Well discuss the devices that make up a hand off auto circuit and how. Multiple uses of the hoa designation for the same device is a recipe for confusion both switches are labeled with the same function which makes it unclear exactly how the motor is going to be started.
Gallery of Hoa Wiring Diagram
