A DC SPD 2 Pole ZMD-B100DC is an electrical protection device specifically designed for DC power supply systems. Its core function is to suppress and dissipate the sudden transient overvoltage (known as “surge”) in DC circuits, while blocking excessive surge current. This protects downstream DC electrical equipment or the entire DC system from surge damage, ensuring the stable operation of the system as well as the safety of personnel and property.
How Does a DC SPD 2 Pole (DC SPD) Work?
The working logic of a DC Surge Protector (DC SPD) revolves around four core stages: “surge detection – rapid response – energy dissipation – return to normal state”. Its design is specifically tailored to the characteristics of DC systems, such as “no natural zero-crossing point and unidirectional continuous current”, ensuring that it suppresses surges without interfering with the normal power supply of the system.
It is widely used in scenarios such as high-voltage direct current (HVDC) transmission systems, new energy fields (e.g., DC side of photovoltaic inverters, energy storage systems), DC charging piles, and DC power supply networks for rail transit
