Low Voltage Devices are more prone to damages due to Lightning Surges and High Voltage Surges. There are many ways to protect these devices from Lightning Surges. The first step is to protect the supply system from High Voltage surges and lighting. This include providing proper earthing(grounding) and providing Lighting arresters at various key locations. The second method is to provide surge arrestors at different point where there is a risk for lighting surge. The third method is to provide SPD, Surge Protection Devices. Surge protection devices open up when there is a heavy surge and protect the device.