??摘要：本文介绍了安科瑞DJSF1352-RN直流电表应用于尼日利亚小型光伏发电设施的直流侧。主要用于测量光伏系统中的电流，通过霍尔测量、通信和控制电路系统。
??Abstract: This paper introduces the application of Acrel DJSF1352-RN DC energy meter in the DC side of a photovoltaic system in Nigeria. It is mainly used to measure the DC current in the photovoltaic system, and cooperate with hall current sensor to measure, communicate and control the circuit system.
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??该公司位于尼日利亚，是一家新能源公司。主要从事非洲光伏发电项目。客户应使用直流电表来监测和测量光伏系统中的直流侧。
??The company is located in Nigeria and is a new energy company. Mainly engaged in photovoltaic power generation projects in Africa. The customer wants to use DC meters and hall sensors for monitor current and voltage at the DC side of photovoltaic system.
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??DJSF1352-RN导轨直流电能表主要设计在电信基站、直流充电桩、太阳能光伏等应用场合。该系列仪器可以测量直流系统中的电压、电流、功率和正反向电能。在实际使用现场，可以测量总电能和规定时间内的电能。测试结果不仅可用于本地显示，还可与工业控制设备和计算机连接，形成测控系统。
??该仪器具有红外通信接口和RS-支持485通信接口，同时支持Modbus-RTU协议和DLT645-97(07)协议；可带继电器报警输出和开关量输入功能；通过仪表面板按钮，设置变比、报警和通信；有开关量事件记录（Modbus协议)、编程和事件设置记录(645协议)、数据瞬时和定时冻结功能(645协议)、电压电流功率值记录功能。
??DJSF1352-RN rail-mounted DC power meter designed for telecommunications base stations, DC charging piles, solar photovoltaic and other applications, this series of meters can measure the voltage, current, power and forward and reverse energy and so on in the DC system.The actual use of the site, you can measure the total power, but also measure the energy within a specified period of time. The test results can be used for local display, but also with industrial control equipment, computers to form a measurement and control system.
??The meter can have infrared communication interface and RS-485 communication interface, and supports Modbus-RTU protocol and DLT645-97 (07) protocol at the same time.The meter can have relay alarm output and digital input function;You can set the ratio, alarm, and communication through the meter panel keys according to different requirements.The meter can have event recording of switch (Modbus protocol), programming and event setting records (645 protocol), instantaneous and timing freeze function of data (645 protocol), value recording function of voltage and current power.
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??Note：when dual DC input（D）function is selected，if Hall current sensor input is used in
??current channel,a power supply module shall be provided to supply power to the second Hall sensor;if D function is not provided,the built-in power supply of electric meter can be used.
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??客户有太阳能混合动力系统。PV板、电池储能和柴油发生器电信站连接到同一母线。客户希望使用直流仪器来监测母线的电流电压。他们的太阳能系统是电信基站，辅助电源是DC48V，电流是DC100A。
??The customer have a solar hybrid system. PV panel, battery storage and diesel generator for a telecom station，All the 3 systems are connected to a single bus bar. They wants to know the watt hour reading from the bus bar using a DC meter. And their solar site is a telecom site. the power supply voltage is DC 48V, the current is DC100A.
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??1.Solutions For Enterprise Micro-grid System 2021.04