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Nov 6, 2009 · My preference is to install an auxiliary switch on the starter disconnect mechanism. When connected properly, it will break the circuit no different than does your present H/O/A scenario... with the exception that it is done concurrently with the motor circuit conductors.
Also known as a maintaining contact, these are the normally open contacts of a magnetic starter that are connected in parallel with the start button in a three-wire control circuit.
Jun 14, 2019 · Have a motor starter that has a hand/off/auto selector, 2 estops and a start/stop pb controlling a remote load out arm for the pump and then a flow meter that should also control the auto side of the hoa switch.
Detailed wiring diagram for a Hoa switch, illustrating the connections and setup for a proper installation. Learn how to wire your switch correctly for safe and functional use.
Nov 5, 2002 · It's not a good idea to use both a HOA and Start/Stop Buttons at the same location. It confuses the operators. When controlling a motor or other device from a PLC or other type of controller, you would want to use the HOA switch.
Jan 5, 2022 · The H535 combines a switching relay and a Hand-Off-Auto (HOA) switch in a single housing...
Nov 3, 2014 · HOA is the de facto standard for most places. These days it is not all that uncommon to not even have such a switch since it is all but impossible in many plants for an operator to actually run things manually anyway, and not having the switch discourages them from trying.
Nov 24, 2015 · 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 …
Remote mounted Remote mounted current status sensor* and command relay with or without HOA switch
Nov 3, 2014 · A motor that has an Auto Start function, uses a Hand - Off - Auto, 3 position selector switch. If switch is in Hand (motor running) and it needs to be placed in Auto, if Auto is calling for the motor to run, by going through the Off position, the motor starter will drop out and reenergize.
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