What happens during the reverse acting limit control operation?

What happens during the reverse acting limit control operation?

• A. It opens on heating
• B. It closes on heating
• C. It toggles frequently
• D. It remains neutral

Answer: (B)

During reverse acting limit control operation, the device is designed to respond to temperature changes in a specific manner. In this case, it closes on heating. This means that as the temperature of the system increases beyond a preset limit, the control activates and closes the circuit to stop further heating. This is crucial for preventing overheating and maintaining safe operating conditions within the system. The functionality of reverse acting limit controls is essentially the opposite of direct acting controls, which would open when heating occurs. By closing on heating, the reverse acting limit helps to maintain a consistent and safe temperature level, ensuring that the system operates efficiently and reduces the risk of equipment damage from excessive heat.

During reverse acting limit control operation, the device is designed to respond to temperature changes in a specific manner. In this case, it closes on heating. This means that as the temperature of the system increases beyond a preset limit, the control activates and closes the circuit to stop further heating. This is crucial for preventing overheating and maintaining safe operating conditions within the system.

The functionality of reverse acting limit controls is essentially the opposite of direct acting controls, which would open when heating occurs. By closing on heating, the reverse acting limit helps to maintain a consistent and safe temperature level, ensuring that the system operates efficiently and reduces the risk of equipment damage from excessive heat.