Control Transformers

Control transformers are essential components in industrial and commercial electrical systems. They are specifically designed to provide stable secondary voltage for control circuits in various equipment and machinery. These transformers typically step down the primary voltage to a lower secondary voltage suitable for control circuits, with standard secondary voltages including 24V, 12V, or even lower, depending on the application.
These transformers feature multiple taps on either the primary or secondary windings, providing flexibility in voltage selection. They are constructed with high-quality materials such as pure copper core wire for excellent conductivity and low temperature rise, ensuring high performance and reliability. Additionally, control transformers from ATO include metal brackets for enhanced protection and cold-pressed terminals for improved wiring density.
One of the key functions of control transformers is to provide electrical isolation between the primary (input) and secondary (output) windings. This isolation is crucial for safety, as it prevents higher voltages on the primary side from reaching the secondary side and control circuits. Additionally, control transformers are built to handle the load characteristics of control circuits, which generally have low power requirements compared to central power systems. They are also designed to provide a stable output voltage even when the input voltage on the primary side fluctuates, ensuring the reliable operation of control circuits.
When selecting a control transformer, several factors need to be considered. These include determining the secondary voltage required by the control circuit, calculating the power (VA or volt-ampere rating) based on the total load of the control circuit, considering inrush current requirements of devices, and ensuring the transformer is rated for the ambient temperature and environmental conditions where it will be installed. Proper sizing and installation of control transformers are crucial for their reliable operation and longevity.
Control transformers are widely used in applications such as industrial robots, molding machines, HVAC controllers, power distribution systems, rail traffic, welding machines, compressors, and new energy resources. They provide the necessary voltage transformation and isolation to power and control various components in these systems.