Frequent thunderstorms in certain regions of Australia often trigger outdoor grid fluctuations and generate intense electromagnetic interference (EMI) at industrial sites. Under these extreme conditions, the automated control systems for power plant pipeline valves frequently face risks of signal distortion, command loss, or even control board burnout due to transient surge currents. Maintaining signal consistency and equipment physical safety becomes a critical consideration in the selection of explosion-proof actuators.
Evaluating actuator stability in complex electromagnetic environments requires specific circuit protection parameters. First, the equipment must possess a strong surge protection circuit capable of resisting a 1kV lightning surge waveform, ensuring it will not be burned when used outdoors. Second, the interface circuit must feature 4kV anti-EFT (Electrical Fast Transient) capabilities to protect the actuator from external interference and ensure that valve open-close control remains highly reliable. Furthermore, if the external power supply is unexpectedly disconnected due to lightning strikes, the equipment should feature a fail-safe return function, driving the valve to a preset safety position (full-close, full-open, or current position) using internal energy storage.
Dynamic (DCL) explosion-proof electric actuators are equipped with a multi-functional integrated circuit board, providing a reliable terminal control solution for high-interference industrial environments. The control circuit integrates 1kV surge resistance and 4kV anti-EFT interface circuits, effectively guaranteeing signal consistency under complex conditions, while also supporting the Modbus-RTU field bus. During unexpected power outages caused by thunderstorms, DCL actuators can automatically switch to the fail-safe return mode utilizing an internal backup power source. They will automatically exit this state and return to normal working mode once the external power supply is restored, providing a parameterized and standardized safety guarantee for automated pipelines in Australian power plants.