Background
This article introduces the application of Acrel DC meters in PV systems in Indonesia. The device is measuring current, voltage and energy together with a shunt.
Project Overview
This company is located in Singapore and is the Photovoltaic system installation services company in Singapore. Mainly used DC energy meter DJSF1352-RN and shunt, used to measure and monitor current and voltage in a PV system.
DJSF1352-RN Series DC Energy Meters
DJSF1352-RN series intelligent DC energy meter is designed for applications such as DC panels, solar power, telecommunications base stations, and charging posts. This series of instruments can measure voltage, current, power, forward and reverse power in a DC system. It can be used for local display, and connected with industrial control equipment, computers, form a measurement and control system. And it has a variety of external excuse functions for the user to choose RS485 communication interface, Modbus-RTU protocol, relay alarm output, digital input/output. According to different requirements, through the instrument panel keys, you can set the ratio, communication parameters. The product meets the relevant technical requirements of the standard Q/GDW1825-2013 DC power meter specification, GB/T29318-2012 Non-vehicle charging electric energy metering for electric vehicles, Q/GDW364-2009 Single-phase energy meter specification.
Technical data
| Technical parameters | |||
| Input | Nominal value | Voltage input range | Current input |
| DC 0- 1000V See the physical wiring diagram | Shunt: 0-75mV;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: s0 2VA, current S0.1VA | ||
| Accuracy class | Class 1 | ||
| Function | Display | 8-bit segment LCD screen (LCD) | |
| Communication Interface | RS485, infrared | ||
| Communication protocol | Modbus-RTU, DL/T 645-2007 | ||
| Switch | Switch output | 2 Relay outputs, 2A30VDC or 2A250VAC | |
| Switch input | 2 dry contact inputs | ||
| Pulse output | A second pulse output, an 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 I Voltage input I Current input "1 Relay output and switch input // Communication interface 11 Pulse output 3kV/1minPower supply /1 Relay output /1 Voltage input // Current input 3kV/1 minPulse output // Communication interface /1 Switch input 2kV/1min | ||
| Insulation resistance | ≥40M | ||
| 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°C ~+80°C | |
| Humidity | ≤93%RH, no condensation, no corosive gas | ||
| Altitude | ≤2500m | ||
Product main functions
| Shape & Cut-out | Type | Function | Optional Function |
| Rail installation | DJSF1352-RN | DC voltage, current, power measurement, forward and reverse energy metering, multi-rate energy statistics, SOE event record; 8-digit LCD display; infrared communication; voltage input maximum 1000V, current external shunt connection (75mV) or Hall element Access (0-5V); power accuracy level 1 | 1.2D1/2D0(K) |
| 2. The second DC energy metering |
Installation Pictures
