🔍 Key Concepts

• Overload relay contacts (OL) are usually drawn in their "normal" state, which is the state when there is no overload (motor current at or below full-load). • The control relay (CR) coil will be energized only when its supply path through the overload relay and line contactor is complete, which happens when the motor is running normally. • Follow the control circuit path from the GP supply, through the overload relay, to the CR coil and then to the CR contacts that operate the Run and Overload indications.

💭 Think About

• When motor current is at or below full-load, would the overload device trip or stay reset? From that, what is the natural state (open or closed) of its control contacts? • If the overload relay has not tripped, is the CR coil energized or de‑energized in this diagram? Then, in that condition, are the CR contacts shown as open or closed? • Look at what must be true in the circuit for the motor to be running: which contacts in the control circuit have to be closed to keep power applied and the Run light available?

✅ Before You Answer

• Verify which symbol in the control circuit represents the normally closed overload contact in series with the control relay coil. • Check whether the CR contacts that feed the Run and Overload lamps are shown as normally open or normally closed, and what happens to them when CR is energized. • Confirm that with current no greater than full-load, the overload relay is not tripped, so its contacts remain in their normal, reset position.