Troubleshooting 480v 3 phase motor

Working through the system Motor to disconnect,overloads, contactor and. A typical - phase squirrel-cage motor has six connection leads in the electrical connection box for the three coils. If someone works with AC - phase motors , then it is important to know how to connect these motors in Star and Delta connection, and how to detect an electrical problem.

A good motor should read less than 0. Further troubleshooting maybe required.

Actually voltage or current unbalance will produce too much heat thus damaging the motors.

Check all three wires singly TTT(all three phases ) to the ground wire.

If it is go directly to the motor and disconnect from cable and check motor and the cable separately. Always keep hands and clothing away from moving parts. Be sure required safety guards are in place before starting equipment.

Motor fails to start upon initial installation. Capacitor (on single phase motor ) may have failed. Such readings are needed to correctly determine the cause of most electrical troubles. Section 1: MOTOR VISIBLY BURNED OUT. First, the drive input is the ac power entering the drive from the mains.

Secon the drive and its output, where the ac to dc converter, the dc filter, and the dc to ac inverter provide the three phase power to the motor. Electrical Troubleshooting Simulation software to teach you how to troubleshoot an electrical motor control circuit. At the end is just an example how our software uses realworld workorder system to track student while doing electrical troubleshooting with our simulation . NORD Drivesystems shows how to check OHM's.

A number of diagnostic tools – a clamp-on ammeter, temperature sensor, Megger , or oscilloscope – may help illuminate the problem. This video has been created by. Preliminary (often definitive) tests generally take. The smaller the motor , the higher this . For single phase motors , the expected voltage is about 230V or 208V depending whether you are using the UK or America voltage system.

Check that the correct voltage is applied to the motor. Use this Motor Trouble-Shooting Chart to diagnose likely causes of motor malfunction such as the motor not starting initially or running then failing restart. An article on electrical industrial troubleshooting with sections on industrial motor control and programmable logic controller.

Covers problem solving with motor test and short circuit training. There were three hours of shop time doing actual hands on work of the problems and material covered in the first hour.