This article introduces the application of Acrel DC meters in PV systems in Canada. The device is measuring the current, together with the shunt.
Project Overview
The company is located in Canada, and the company is mainly engaged in the photovoltaic industry. The customer wants to use the DC meter DJSF1352-RN and shunt to monitor and measure the current and voltage of the photovoltaic system and use the switch function of the DC meter for control.
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 ports. 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 from: 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.
Model Description
Technical data
| Technical parameters | lndex | ||
| Input | Nominal value | Voltage input range | Current input |
| DC 0-1000V | 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: ≤0.2VA, current ≤0.1VA | ||
| Accuracy | Class 1 | ||
| Function | Display | 8-bit segment LCD screen (LCD) | |
| Communication interface | RS485, infrared | ||
| Communication protocol | Modbus-R TU, 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, 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 ll Voltage input l/l Current input l/l Relay output and switch input l/ Communication interface // Pulse output 3kV/1min | ||
| Insulation resistance | ≥40MΩ | ||
| Average barrier-free working hours | ≥50000h | ||
| Environment | Temperature | Normal operating temperature: -25C~+65°C; Limit | |
| Humidity | ≤93%RH, no condensation, no corrosive gas | ||
| Altitude | ≤2500m | ||
Product main functions
On-site Picture
