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Home » Projects » PROJECTS » ACREL DJSF1352-RN DC energy meter’s Application in PV power generation equipment in Saudi Arabia

ACREL DJSF1352-RN DC energy meter’s Application in PV power generation equipment in Saudi Arabia

Views:2     Author:Site Editor     Publish Time: 2021-11-23      Origin:Site


Abstract: This paper introduces the application of Acrel DJSF1352-RN DC energy meter in the DC side of a photovoltaic system in Saudi Arabia. It is mainly used to measure the DC current in the photovoltaic system, and cooperate with current shunts to measure, communicate and control the circuit system.


1. Project Overview


      The company is located in Saudi Arabia. The company is mainly engaged in installation, construction and maintenance of small photovoltaic power generation center projects in Bulgaria and surrounding countries. The customer wants to use DC meters and hall sensors or current shunts for monitoring, metering and communication of current and voltage at the DC side of photovoltaic system, and demands that the DC energy meter would be able to measure two channels of DC circuits.



2. DJSF1352-RN/D DC Energy Meters


      DJSF1352-RN rail-mounted DC power meter with double DC input channels, 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), maximum and minimum value recording function of voltage and current power.



3. Type and Function Description


图片 2


      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 elecctric meter can be used.



Technical parameters

Index


Input

Nominal value


Voltage input range

Current input

DC 0-1000V

DC 0-1000V

See the physical wiring diagram


Hall sensor:0-20mA、4-20mA、0-5V,0-10V and so on.

Overload

1.2 times rated (continuous); 2 times rated/1 second;

Power consumption

Voltage: ≤0.2VA, current ≤0.1VA

Accuracy class

Class 1

Function

Display

8-bit segment LCD screen (LCD)

Communication Interface

RS485(two options)

Communication protocol

Modbus-RTU,DL/T 645-2007

Switch

Switch output

2 Relay outputs, 2A/30VDC or 2A/250VAC

Switch input

2 dry contact inputs

Pulse output

A second pulse output, a energy pulse output

See the SYS->PLUS display in the meter menu settings. For example: The meter displays 100, which is 100imp/kWH

Power Supply

Voltage range

AC/DC 85-265V or DC24V(±10%) or DC48V(±10%)

Power consumption

≤ 3W

Power frequency withstand voltage

Power supply // Voltage input // Current input // Relay output and switch input // Communication interface / / Pulse output 3kV/1min

Power supply // Relay output // Voltage input // Current input 3kV/1min

Pulse output // Communication interface // Switch input 2kV/1min

Impulse withstand voltage

±6KV

Insulation resistance

≥ 40M Ω

Average barrier-free working hours

≥50000h

Environment

Temperature

Normal operating temperature: -25 °C ~ +65 °C; Limit working temperature: -40 °C ~ +70 °C;

Storage temperature: -40℃~+80℃

Humidity

≤93%RH, no condensation, no corrosive gas

Altitude

≤2500m


Pulse constant:



Maximum power


999.9W

10000

imp/kWh

9.999kW

1000

imp/kWh

99.99kW

100

imp/kWh

999.9kW

10

imp/kWh

9999kW

1

imp/kWh

Maximum power = rated voltage * voltage ratio * current ratio * 1.2



4. Requirements from Customer


4.1 The following are the customer's on-site solar panel parameters:


图片 10

图片 8

图片 9


4.2 Measure 2 channels of DC circuits

      

      The customer requires a DC meter with two channels of direct current metering function, so two current shunts are needed to work with the meter.


6. Installation Picture

图片 12(1)



Bibliography


1.Solutions For Enterprise Micro-grid System 2021.04


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