Is it true that power to the loads in a 230-volt circuit can be controlled by a relay that operates in a 24-volt circuit?

A relay is a device designed to control a high voltage circuit using a low voltage signal. In this case, a relay operating on a 24-volt circuit can indeed control the power delivered to loads within a 230-volt circuit.

When the relay is energized by the 24 volts, it closes its contacts, allowing the higher voltage (230 volts) to flow through the load. This design is widely used for safety and practicality, enabling the use of lower voltage control circuits which are easier and safer for operators to handle. This method is common in various applications, including HVAC systems and industrial controls, where low voltage control is essential for protecting operators and reducing the risk of electrical shock in the system.

Therefore, it is true that a relay operating in a 24-volt circuit can be used to control the power to loads in a 230-volt circuit.