In this lesson well examine a common industrial application of 2 wire control circuits known as a hand off auto circuit. A motor starter is a combination of devices used to start run and stop an ac induction motor based on commands from an operator or a controller.
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Hoa motor starter wiring diagram. In north america an induction motor will typically operate at 230v or 460v 3 phase 60 hz and has a control voltage of 115 vac or 24 vdc. The switch is shown as a single pole. Basic wiring for motor contol circuitry of a starter two wire control two wire control circuits or low voltage release one of the common control wiring circuits used is known as two wire or low voltage release lvr. The circuit shown in figure 271 permits a motor to be operated by a float switch or to be run manually. Motor 3ct to 120 v separate control ot is a switch that opens when an overtemperature condition exists type mfo and mgo only t1 t3 motor 3 2 l2 t2. Hand off automatic controls recognize hand off automatic switches on a schematic diagram.
It utilizes a main tained contact type of pilot device such as a thermostat float switch or presence sensor. Hand off automatic controls are used to permit an operator to select between automatic or manual operation of a motor. If you have a 120v coil instead of running a line from coil overload l2 you must run coil overload neutral. Well discuss the devices that make up a hand off auto circuit and how. A line diagram gives the necessary informa tion for easily following the operation of the various devices in the circuit. 3ph starter3ph motor line voltage control three phase 3ph motor starter controlling a three phase motor rev 08 aug 2006 the above wiring diagram assumes your magnetic starter has a 240v coil.
Wiring diagram book a1 15 b1 b2 16 18 b3 a2 b1 b3 15 supply voltage 16 18 l m h 2 levels b2 l1 f u 1 460 v f u 2 l2 l3 gnd h1 h3 h2 h4 f u 3 x1a f u 4 f u 5 x2a r power on optional x1 x2115 v. A wiring diagram gives the necessary information for actually wiring up a group of control devices or for physically tracing wires when trouble shooting is necessary.
Gallery of Hoa Motor Starter Wiring Diagram
