The R718N37 NETVOX wireless three-phase current detector is used to detect three-phase electrical input current. The device is compatible with the LoRaWAN protocol, and integrates a chip module that conforms to the LoRaWAN wireless protocol, and joins the gateway to display the collected data in the gateway.The device is powered by a battery and receives AC current through a current transformer.

This device adopts open-loop current transformer, which can be easily connected to the device to be tested. The A phase line, the B phase line and the C phase line of the three-phase electric power are respectively connected to the corresponding current transformers.

Example Applications

Smart current detection equipment in the city such as home or business
Thermal system equipment

Features of NETVOX Sensors

• Wireless range of 10 km *

• LoRaWANTM Class A compatible

• Frequency Hopping Spread Spectrum (FHSS)

• Improved interference immunity

• Improved power management for longer battery life

• Encrypt-RF™ Security (Diffie-Hellman Key Exchange + AES-128 CBC for sensor data messages)

• Battery Life* :

5 years (Conditions: ambient temperature 25 °C, 20 triggers/day, txpower = 20dBm, LoRa spreading factor SF = 10)

• Over-the-air updates (future)

• RCM approved

• Third-Party online wireless sensor monitoring and notification system to configure sensors, view data and set alerts via SMS text and email (optional)

• Available third-party platform: Actility/ThingPark, TTN, MyDevices/Cayenne

• R718X series carry magnets which can be attached to ferromagnetic materials and objects

*Actual range may vary depending on environment.

*Battery life is determined by sensor reporting frequency and other variables

Technical Specifications

Input Power	2 x 3.6V ER14505 AA lithium batteries
Sleeping Mode	25uA
Wake up Mode	7mA @ 3.3V
Low Voltage Threshold	3.2V
Tx Current	127mA/3.0V
Rx Current	11mA @3.0V
Current Measurement Accuracy	<+-1%
Current measurement Accuracy Range	1A to 150A (depending on the current transformer configuration)
Battery Life	5 years (Conditions: ambient temperature 25 °C, 15 min heartbeats, txpower = 20dBm, LoRa spreading factor SF = 10)

Frequency

Tx Power	19dBm±1dBm
Rx Sensitivity	-136dBm (LoRa，Spreading Factor=12，Bit Rate=293bps ) -121dBm (FSK,Frequency deviation=5kHz, Bit Rate=1.2kbps)
Antenna Type	Build-in antenna
Communication Range	Build-in antenna
Data Transfer Rate	0.3kbps～50kbps
Spread Technique	LoRa/FSK
Available Frequency	EU863-870，US902-928，AU915-928， KR920-923，AS923，CN470-510 Configured before shipment

Current Transformer

Rated input current	75A, 50Hz~60Hz
Rated output current	10mA
Saturation Current	≥75A
Ratio	3000:1
Load Resistance	10Ω
Linearity	1%
Isolation withstand voltage	3000V
Housing Material	Flame Retardant Grade 94-V0 UL Material
Environmentally friendly	In line with ROHS
Working temperature	-40°C~+85°C

Physical

Dimension	L:112mmW:65mmH:32mm Wire Length: 1 Meter
Weight	141g
Operating Temperature	-20℃ ～ 55℃
Environment Humidity Range	<90% RH (No condensation)
Storage Temperature	-40℃ ～ 85℃

Datasheet:

R718N37.pdf

User manual:

R718N37_UG.pdf

Battery Calculator:

Netvox Battery Calculator

Netvox LoRa Command Resolver:

LoRa Command Resolver

R718N37 - Netvox LoRaWan Wireless 3-Phase Current Meter with 3 x 75A Clamp-On CT