Photovoltaic energy terminal box is a kind of transfer construction line, marking the branch line, and providing a convenient interface device for wiring and line checking. It is a box made of metal or plastic specially installed with Photovoltaic energy terminal, also called control box. According to the use function, it can be divided into multiple functional boxes such as grounding terminal box, transfer terminal box, fire terminal box, explosion-proof terminal box and so on. In some cases, in order to facilitate the construction and debugging, some more special and regular products such as short-circuit isolators can be installed in the photovoltaic energy terminal box.

Photovoltaic energy terminal box is mainly used to protect the internal Photovoltaic energy terminal from waterproof, moisture, dust, electric shock, ultraviolet radiation, etc. It is an intermediate link between outdoor electrical equipment and indoor measurement and control, protection, communication and other equipment. When the air is humid, especially in the rainy season, moisture and condensation in the Photovoltaic energy terminal box will easily cause the insulation resistance of the DC secondary circuit to the ground to drop. In severe cases, the insulation resistance will drop to zero, thereby forming a DC positive power supply or a negative power supply grounding. . If the two DC points are grounded, it will cause the protection to refuse or malfunction, and even damage the equipment, seriously threatening the safe operation of the power grid. Moisture of the Photovoltaic energy terminal box will rust the terminal block screws and connecting pieces, which will make the secondary terminal contact poorly. It will also cause the current loop terminal to heat up or even open, causing the protection to refuse or malfunction and cause an accident. Poor contact of the control circuit, signal circuit and other terminals will cause abnormal operation of the measurement and control and protection devices, and false signalling, leading to misjudgment by the operator and making a wrong analysis.

The photovoltaic energy terminal box is equipped with a temperature and humidity controller to prevent condensation and pre-adjust the temperature. The temperature and humidity controller is composed of a temperature sensor and a condensation sensor. It monitors the temperature and humidity changes in the terminal box at any time. When the internal environment temperature of the box is lower than the preset temperature or condensation is about to occur, the controller automatically Start the heater to run and heat to increase the temperature of the environment inside the box and destroy the small environment that produces condensation. When the condensing condition in the box disappears or the ambient temperature reaches the preset temperature, the heater is automatically cut off to stop heating, and the controller resumes the monitoring state.

Today I will mainly share with you the role of Photovoltaic energy terminal box in waterproof and moisture-proof.