Why is a control transformer used in motor controls?

A control transformer is integral to motor controls primarily because it steps down high voltage to a lower voltage suitable for control devices. In many applications, control devices such as relays, contactors, and control circuits operate at lower voltage levels (often 120V or less). When the main power supply is of a higher voltage, using a control transformer allows those devices to safely and effectively operate without exposing them to the risks associated with higher voltages.

The use of a control transformer not only enhances safety by lowering the operating voltage of control circuits but also helps prevent damage to sensitive components. By providing the necessary transformation of voltage, these transformers ensure that control devices function properly without requiring extensive modifications to the existing wiring or control schema. This is essential for maintaining effective and safe operations within motor control systems.