PV DC Surge Protection Device TDS5 TDS7

Technical Data

Product Introduction

Talemod DC Surge Protector (DC SPD) is a critical protective component designed specifically for DC electrical systems. Its core function is to protect precision electronic devices in DC power supplies and prevent them from being damaged due to transient overvoltage caused by lightning strikes or internal switch operations.

Core functions

Voltage monitoring and rapid response: During normal operation of the DC system, surge protectors (SPDs) are in a high impedance state and will not have any impact on the circuit. When an abnormal transient voltage surge occurs in the circuit, the protector can respond within nanoseconds and quickly switch to a low impedance state.
Energy transfer and voltage clamping: After switching to a low impedance state, the surge protector will direct dangerous surge currents into the ground, preventing them from flowing through the protected equipment. At the same time, it will clamp the voltage (i.e. residual voltage) at both ends of the line to a safe preset value - this value is called the voltage protection level (Up), ensuring that the voltage borne by the equipment is always within a safe range.
Automatic recovery and status indication: When surge energy is transferred and the line voltage returns to normal, the surge protector will automatically recover to a high impedance state.

Main features of the product

Maximum continuous operating voltage (Uc): refers to the maximum DC voltage that a surge protector can safely and continuously withstand. This value must be higher than the maximum operating voltage of the system.
Nominal discharge current (In): represents the standard capability of surge protectors to withstand 8/20 microsecond waveform lightning current pulses, and is a key indicator for measuring their performance.
Voltage protection level (Up): refers to the peak value of residual voltage after being limited by the surge protector. On the premise of meeting the maximum continuous operating voltage (Uc) requirement, the lower the voltage protection level (Up) value, the better its protection effect on the equipment.

Main application areas

Solar photovoltaic system: protects the DC input terminals of photovoltaic arrays, combiner boxes, and inverters.
Energy storage system: protects the DC side of the battery management system and energy storage converter.
Electric vehicle charging facilities: protect the power conversion module inside the DC charging pile.
Communication base station power supply: protection -48V communication DC power supply equipment.
Industrial automation control system: protects the DC power lines of programmable logic controllers (PLCs), sensors, and other equipment.