Low voltage photovoltaic grid connected cabinet is mainly applicable to small power grid connected power supply system of photovoltaic power station and distributed photovoltaic power generation project of AC 400V low-voltage system. As the general outlet of photovoltaic power station, photovoltaic grid connected cabinet exists in the photovoltaic system. It is a power distribution device connecting photovoltaic power station and power grid. Its main function is to serve as the dividing point between photovoltaic power generation system and power grid. For low-voltage grid connected photovoltaic power stations, the low-voltage photovoltaic grid connected cabinet is mainly composed of anti islanding protection device (fault splitting device and power quality online monitoring device can also be added), disconnector switch, grid connected circuit breaker, lightning arrester, temperature and humidity controller, power metering device and cabinet body
低压光伏并网柜的作用
■当光伏发电系统出线的电压、频率、过载等异常情况对电站设备构成威胁或对电网侧产生影响和冲击时，光伏防孤岛装置可以快速向并网断路器发送跳闸命令，并迅速切断故障电路。当故障诊断后电网电压恢复正常时，如果监测正常，防孤岛保护装置将自动关闭断网器。
■当出线的电压、频率、过载等异常情况对电网侧向冲击并影响到站内设备时，光伏防孤岛装置还可以快速监控并向并网断路器发送跳闸命令，从而快速断开并网开关，防止孤岛效应。
■当光伏发电系统自身一侧出现故障，电网侧正常时，需要相关人员进行检修。这种光伏并网设备可以有效防止从电网侧到光伏侧的反向电力传输，从而保证了光伏侧检修人员
人员安全。
低压光伏并网柜的特点
■ 容量覆盖面广。室外机柜可以覆盖1250A以下用户的并网需求，室内机柜可以覆盖4000A以下用户的并网需求;
■ 具有闭压、电压损失跳闸等功能，实现无人管理;
■ 预留独立铅封计量室，让光伏发电一目了然;
■ 具有RS485通讯接口，采用Modbus RTU通讯协议;
■ 元器件来自国内外知名品牌，可根据客户需求使用;
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