Simple Motor Starter Diagram
Figure 4 shows the automatic dc starter circuit diagram.
Motor starter diagram. Dc motor starters and circuit diagram. For the accurate operation of dc motor there must be some controlling circuit and protective devices are required to link with it to operate. Provide protection to the motor from damage due to a short circuit.
Contactor m is closed to start the machine. It uses three contactors an overload relay one auxiliary contact block a normally open start pushbutton a normally closed stop pushbutton an on delay timer of 0 20 seconds and a power supply with a fuse. These switches are designed to withstand the larger loads required by motors.
These devices link to the dc motor has these 4 main purposes. The following diagram is shown for 3 phase motor control of a delta star connection. The start stop and timing circuits could alternatively be controlled using a plc.
There are basically two types of motor starters manual starters and magnetic starters. Motor starters serve two main purposes. What is a motor starter motor starters are switches specially designed for starting motors.
After suitable time delays contactors 1a and then 2a close reducing the armature circuit resistance.