AC/DC SPD An AC/DC Surge Protection Device (SPD) is a crucial component in safeguarding electrical systems from transient voltage surges caused by lightning strikes, power surges, or other disturbances. Here’s a closer look at what an AC/DC SPD is and its key features: What is an AC/DC SPD? An AC/DC Surge Protection Device (SPD) is designed to protect electrical systems that operate on both alternating current (AC) and direct current (DC) from voltage spikes or surges. This type of SPD is versatile and can be used in systems that include both AC and DC circuits, ensuring comprehensive protection. Key Features: Dual Protection: AC/DC SPDs are engineered to handle both AC and DC voltage spikes. This is important in systems where both types of current are present, such as renewable energy systems (solar power systems), hybrid power systems, or certain industrial applications. Clamping Voltage: This is the voltage level at which the SPD starts to conduct and divert the surge away from sensitive equipment. It’s important to choose an SPD with a clamping voltage suitable for your system to ensure effective protection. Energy Rating: The energy rating indicates how much energy the SPD can absorb before it fails. Higher ratings are typically required for systems with higher surge potential. Response Time: The response time of an SPD is crucial. Faster response times mean the device can react quickly to surges, providing better protection. Installation Location: SPDs can be installed at various points in the electrical system, such as at the main service panel, subpanels, or near sensitive equipment. The placement depends on the level of protection needed and the configuration of the electrical system. Type: AC/DC SPDs come in various types, including: Type 1: For protection at the service entrance, often installed before the main distribution panel. Type 2: For protection at distribution panels or subpanels. Type 3: For protection at the equipment level.