On a magnetic across-the-line starter, how are the leads connected to the motor starter?

In a magnetic across-the-line starter, the incoming power lines are connected to terminals labeled L1, L2, and L3. These terminals are specifically designated for the line connections, which provide the electrical power needed to operate the motor.

The configuration allows the starter to connect the motor directly to the power supply, enabling it to start at full line voltage. This is particularly important for applications requiring immediate torque and full motor acceleration. The magnet coil within the starter is activated when the start button is pressed, thereby closing the contacts and allowing current to flow from the incoming lines to the motor.

Using the correct terminal designation is crucial for safety and proper functioning of the starter. Terminals labeled T1, T2, T3 typically refer to the load side of the starter or the motor terminals, whereas the L1, L2, L3 designations are specifically for incoming power connections. Hence, connecting power lines to these terminals is the standard practice in configuring an across-the-line starter.