PV SPD Surge Protective Device

PV SPD Surge protective device are widely used in photovoltaic combiner boxes, power inverters, DC distribution cabinets, etc. It has the advantages of high discharge current, fast response time, and low residual voltage. The maximum photovoltaic voltage reaches UC≤1200VDC.

FEATURES

1. Voltage types: DC500V 690V 800V 1000V 1200V;

2. 8/20µs, T2 protection;

3. High discharge capacity, quick response, pluggable;

4. Double thermal disconnection devices, providing more reliable protection;

5. Visual window display, green means normal, Red means defect(need to change new module);

6. Remote terminal optional.

ELECTRICAL TECHNICAL PARAMETERS

WIRING DIAGRAM

MAIN STRUCTURE AND WORKING PRINCIPLE

In the photovoltaic power generation system, protective devices are connected between the positive and negative poles of the line and the ground. Under normal circumstances, the protective device is in a high resistance state. When a surge overvoltage occurs in the power grid due to lightning strikes or other reasons, the protective device will immediately conduct in nanoseconds, introducing the surge overvoltage to the ground, thereby protecting the electrical equipment on the power grid. When the surge voltage passes through the protective device and disappears, the protective device will change back to a high resistance state, This will not affect the normal operation of the power grid. The electrical schematic diagram of the surge protector is shown in the following figure.

CHIP

OUTLINE AND INSTALLATION DIMENSIONS

2P

3P

APPLICATION

●Solar Inverters: To protect the sensitive electronics within inverters from surge currents and voltages.

●Solar Panels: Integrated into the junction boxes of solar panels to protect individual panels from surge events.

●DC Combiner Boxes: In centralized solar systems, SPDs are used to protect the combined DC output from multiple strings of solar panels.

●Battery Storage Systems: To safeguard batteries and associated electronics from overvoltage conditions.

●Grid-Tied and Off-Grid Solar Systems: Ensuring the safety and stability of both grid-connected and standalone solar power installations.

●Charge Controllers: In solar-powered systems with charge controllers to protect against voltage spikes that could damage the controller or connected loads.