This is a BRIEF COURSE INTENDED TO ACQUAINT YOU WITH BASIC electric MOTOR TROUBLESHOOTING AND testing
If you have not been trained in how to work safely near live electrical circuits, do not attempt to measure line voltages. Find someone who has been trained in electrical safety and let him or her take voltage readings. Great care is needed to eliminate the possibility of DEATH or serious injury.
ALWAYS disconnect the power and verify all parts are dead before touching or handling any parts of electrical equipment. Lock out and tag out all electrical circuits. Test for voltage before touching any components. Check for and eliminate the danger of “stored energy” caused by raised or spring-loaded equipment.
The basic test equipment you will need to troubleshoot AC motors includes:
AC clamp-on ammeter
Voltage is the term used to describe the magnitude of the Electro-Motive Force, or in other words, the pressure at which electrons are being forced through a circuit.
It’s current that kills, but it’s voltage that really establishes the level of danger involved in working with electricity. Knowing the voltage you are working with enables you to take appropriate steps to safeguard yourself and those working near you from electrocution.
Typical Delta/Wye Transformer Connections