DWM-DE53LR is an external open-close transformer rail-type multifunctional anti-backflow meter based on Sub-1G(LoRaWAN Default) wireless transmission which is suitable for power monitoring of distributed photovoltaic grid-connected cabinets, power demand side management and other applications. It has the characteristics of no need to dismantle the busbar once, simple and convenient wiring, safe construction, and saves the transformation cost for users.
The device integrates the measurement of all power parameters and the function of power monitoring. In the meanwhile, there are RS-485 communication interface and Sub-1G(LoRaWAN Default) wireless communication interface for users to choose. It adopts the Modbus-RTU protocol to meet the needs of communication network management, and the remote on-off function of the circuit breaker switch can be implemented by the four relay outputs; It uses the OLED display interface to view and control parameter through the panel buttons. It is ideal for real-time power monitoring system and supports BLE near-field wireless communication function. It can connect devices through mobile phones to confi gure parameter and monitor real-time power parameter, which provides great convenience for on-site operation and maintenance and deployment.
Basics
Network Mode: three-phase and four-wire
Rated Voltage: 3L+N/400V AC
Voltage Range: 0.7~1.2Un
Input Frequency: 45Hz~65 Hz
Input Current: external transformer, 80A/120A/200A, default: 120A/40mA
Static Power: ≤10VA
Measurement Parameters: three-phase, each phase voltage/current/active power/
reactive power/power factor/frequency
Metering Method: four-quadrant electric energy metering
Measuring Accuracy: voltage\current level 0.5S, active power level 1, reactive
power level 2, frequency 0.05Hz
Calibration Output: open collector optical pulse output
Maximum Refresh Rate: 50ms, minimum transmission time <5ms
Function
Built-in Clock: independent RTC real-time clock, with perpetual calendar and power-off protection expansion
Display Mode: 128x64 pixel OLED, QR code display, button operation
Switching Output :4 DO outputs, remote control
Wireless Communication: WiFi communication, data rate 54Mbps, IPv6 links, MQTT/TCP/UDP
Wired Communication: 1 channel RS-485, Modbus-RTU, max rate is 9600bps and max cable length is 1000m
Confi guration Method: WeChat mini program confi guration RS-485 and WiFi parameters and reading of electrical energy parameters via BLE
Firmware Maintenance: WiFi FOTA remote upgrade, BLE FOTA near-fi eld upgrade, Type-C local upgrade
Wide area network: Two options-Sub-1G(LoRaWAN Default)/Cat.1 LTE
Work Environment
Working Temperature: -10°C~+55°C(limit: -20°C~+65°C)
Storage Temperature:-45°C~+85°C
Relative Humidity: 5%~95%RH, no condensation
Altitude: <2500m
Wireless
Transmission
Strong Penetration, 5-6 Walls
LoRa Private protocol
LoRaWAN standard protocol
Energy Collection
Three Phase Voltage and Current; Total/Phase Active Power; Total/Phase Power Factor; Frequency; Total Active/Reactive Energy With a refresh rate of 100ms, it can quickly collect data
ON/OFF Control
4-way 5A Relay Output
Used with AC Contactor
Remote Control of 4-way ON/OFF
Anti-backflow Protection
Detects Current Flowing to the Grid and provides Data Feedback
Prevents excess Electricity from being fed into the Grid
Ideal for PV Monitoring Projects
High Accuracy
Voltage/Current Accuracy of 0.5S grade
Active Power Accuracy of 1 grade
Reactive Power Accuracy of 1 grade
Simple Operation
OLED x 1
2-way Interactive Buttons
4-way External Contactor Operation Buttons
4-way red LED Indicators for External Contactor Status
Power Input
Rated Voltage: 3L+N/400V AC
Input Current: External Open-Type CT,
Input Current: 120A/40mA (CT)
Rails Mounting
Standard 3.5mm Rails Mounting
Dimensions: 98x72x65.5mm
Industrial-Grade Design
Flame-retardant Plastic Housing
Double Insulation
Suction Cup Antenna
Fast Uploads
Easy monitoring and management of Large Building Electricity Consumption
Access to other gateways and servers are allowed(TTN/chirpstack)
Application
Energy Management
Apartment Monitoring
Smart Campuses
Smart Buildings
PV Monitoring
Distribution Cabinet
