Non-effectively grounded system line selection device based on ARM

A hardware and software platform based on ARM (advanced RISC machines) is designed to meet the requisition of reliability and rapidity in line selection. ARM processor LPC2214 with low power loss acts as the controlling center of the platform. The software algorithm called integrated criterion combines several line detection methods to improve adaptability of line selection. The advantages of ARM, excellent real time interrupt response and high computing power, make the intelligent algorithm to be fast processed. The operation results show that this platform operates steadily and has high adaptability and line selection is implemented fast and reliable. This device is an ideal earth-fault detection platform for its better performance-price ratio.