When push buttons control the operation of a motor three wires are run from the push button control station to the starter figure 18 6. 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.
Motor Control Circuit Diagram Start Stop 3 Wire Control
3 wire control circuit diagram. The third wire comes directly from the output of the built in hall sensor chip generates output pulses during the fan rotation. The diagram below illustrates the control circuit needed to accomplish the operation. With the help of this third wire a monitoring circuit can see the rotation. This control circuit is a variation of the three wire control circuit. I describe each of the components involved such as the motor starter overload start pushbutton stop pushbutton and control power and. Notice that the stop pushbutton is in series with coil m and that the start pushbutton is in parallel with m contacts 23.
Three phase electrical wiring installation in home iec nec. Control wiring 3 wire control start stop circuit the most common use of 3 wire control is a startstop control. Wiring diagrams sometimes called main or construction diagrams show the actual connection points for the wires to the components and terminals of the controller. The entire control circuit in this example is in parallel between line 1 and line 2. Shows the hand drawn version of the 3 wire start stop control circuit shown in figure 13. In a 3 wire fan first two wires are the power supply wires of the fan.
See image below for an example of 3 wire control being used to pull in a contactor to start a 3 phase motor. Overcurrent protection for 3 wire control circuits 11 ac manual starters and manual motor starting switches 12 class 2510 12 class 2511 and 2512. Multi speed 3 phase motor 3 speeds 1 direction power control diagrams one line diagram of simple contactor circuit. These basic relationships can be found in. Wiring diagrams show the connections to the controller. First the stop pushbuttons are connected in series to form a nor logic.
Next the start pushbuttons are connected in parallel to form an or logic circuit. Three wire control circuits are characterized by the use of momentary contact devices such as push buttons. In this video i demonstrate a 3 wire startstop circuit. A simple three wire push button control circuit is shown in figure 18 7. Basic wiring for motor control technical data.
Gallery of 3 Wire Control Circuit Diagram
