Testing timer relays is one of the most important steps in ensuring reliable operation of electrical systems. timer relays are widely used in industrial, power, automation, and control systems to trigger, delay, or control various circuits and devices. Testing timer relays help to verify their performance, accuracy, and reliability to ensure their proper operation in critical applications. ATO online shop will detail the steps, methods, and considerations on how to test timer relays to ensure the reliability and safety of electrical systems.