Netvox R718N3xxx E Series Wireless 3 Phase Current Meter User Manual

Netvox R718N3xxx E Series Wireless 3 Phase Current Meter

Introduction

The R718N3xxx(E) series is a 3-Phase Current Meter device for Netvox Class A type devices based on the LoRaWAN open protocol and is compatible with the LoRaWAN protocol. R718N3xxx(E) series have different measuring ranges for different varieties of CT. It is divided into:

Wireless 3-Phase Current Meter with 3 x 50A Solid Core CT

| –
R718N3E| Detachable cables
R718N33|

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

| –
R718N33E| Detachable cables
R718N37|

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

| –
R718N37E| Detachable cables
R718N315|

Wireless 3-Phase Current Meter with 3 x 150A Clamp-On CT

| –
R718N315E| Detachable cables
R718N325|

Wireless 3-Phase Current Meter with 3 x 250A Clamp-On CT

| –
R718N325E| Detachable cables
R718N363|

Wireless 3-Phase Current Meter with 3 x 630A Clamp-On CT

| –
R718N363E| Detachable cables
R718N3100|

Wireless 3-Phase Current Meter with 3 x 1000A Clamp-On CT

| –
R718N3100E| Detachable cables

LoRa Wireless Technology

LoRa is a wireless communication technology famous for its long-distance transmission and low power consumption. Compared with other communication methods, LoRa spread spectrum modulation technique greatly extend the communication distance. It can be widely used in any use case that requires long-distance and low-data wireless communications. For example, automatic meter reading, building automation equipment, wireless security systems, industrial monitoring. It has features like small size, low power consumption, long transmission distance, strong anti-interference ability and so on.

LoRaWAN
LoRaWAN uses LoRa technology to define end-to-end standard specifications to ensure interoperability between devices and gateways from different manufacturers.

Appearance

Features

• SX1276 wireless communication module.
• 2 x ER14505 lithium battery in parallel (3.6V/section)
• 3-phase current meter detection.
• Magnetic base
• Main body: IP53; Current transformer: IP30
• LoRaWANTM Class A compatible
• Frequency Hopping Spread Spectrum (FHSS)
• Available third-party platforms: Actility/ThingPark, TTN, MyDevices/Cayenne
• Low power consumption and long battery life

Note: Please refer to the web: http://www.netvox.com.tw/electric/electric_calc.html. Users can find battery lifetime for various models at different configurations on this website.

• The actual range may vary depending on the environment.
• Battery life is determined by sensor reporting frequency and other variables.

Set up Instruction

Power on| Insert batteries. (Users may need a screwdriver to open the battery cover.)
---|---
Turn on| Press and hold the function key for 3 seconds until the green indicator flashes once.
Turn off (Reset to factory setting)| Press and hold the function key for 5 seconds until green indicator flashes 20 times.
Power off| Remove Batteries.

Note

| 1.The device will be off in default after removing the battery and insert it again. 2.It is suggested to wait for 10 seconds between turning on and off the device.

3. 5 seconds after power on, the device will be in engineering test mode.

Network Joining

Never joined the network

| Turn on the device and search for the network to join.

The green indicator light stays on for 5 seconds: Success The green indicator light remains off: Fail

---|---

Had joined the network (without factory resetting)

| Turn on the device, and it will search for the previous network to join. The green indicator light stays on for 5 seconds: Success

The green indicator light remains off: Fail

Fail to Join the Network

| Suggest to check the device verification information on the gateway or consult your

platform server provider.

Function Key

Press the function key and hold for 5 seconds

| The device will be set to default and turned off

The green indicator light flashes 20 times: success The green indicator light remains off: fail

---|---

Press the function key once

| The device is in the network: green indicator light flashes once and sends a report

The device is not in the network: green indicator light remains off

Sleeping Mode

Press the function key and hold for 5 seconds

| The device will be set to default and turned off

The green indicator light flashes 20 times: success The green indicator light remains off: fail

---|---

Press the function key once

| The device is in the network: green indicator light flashes once and sends a report

The device is not in the network: green indicator light remains off

Low Voltage Warning

Data Report

The device will immediately send a version packet report along with two uplink packets including 3-phase current value and battery voltage.
The device sends data in the default configuration before any configuration is done.

Default setting:

• Max Interval = 0x384 (900s)
• Min Interval = 0x384 (900s)
• CurrentChange = 0x0064 (100 mA)

Three-phase current detection:
The device would detect and send report of the current value as the function key is triggered or in configuration.

Measurement Range and Accuracy:

Note: Current transformer (measurement range ≤ 75A): report data as 0 when the current < 100mA.
Current transformer (measurement range > 75A): report data as 0 when the current < 1A.
Please refer to the Netvox LoRaWAN Application Command document and Netvox Lora Command Resolver http://www.netvox.com.cn:8888/cmddoc to resolve uplink data.

Data report configuration and sending period are as following

Min. Interval

(Unit:second)

| Max. Interval

(Unit:second)

|

Reportable Change

| Current Change≥

Reportable Change

| Current Change＜

Reportable Change

---|---|---|---|---
Any number between

1 to 65535

| Any number between

1 to 65535

|

Can not be 0

| Report

per Min. Interval

| Report

per Max. Interval

Example of ReportDataCmd
FPort： 0x06

• Version– 1 byte –0x01——the Version of NetvoxLoRaWAN Application Command Version
• DeviceType– 1 byte – Device Type of Device
• ReportType – 1 byte –the presentation of the NetvoxPayLoadData, according to the devicetype
• NetvoxPayLoadData – Fixed bytes (Fixed =8bytes)

Tips

1. Battery Voltage:
   T he voltage value is bit 0 ~ bit 6, bit 7=0 is normal voltage, and bit 7=1 is low voltage.
   Battery=0xA0, binary=1010 0000, if bit 7= 1, it means low voltage.
   T he actual voltage is 0010 0000 = 0x20 = 32, 32*0.1v =3.2v

2. Version Packet:
   When Report Type=0x00 is the version packet, such as 014A000A02202207080000, the firmware version is 2022.07.08.

3. Data Packet:
   When Report Type=0x01 is data packet; If the device data exceeds 11 bytes or there are shared data packets, the Report Type will h ave different values.

Device

| Device

Type

| Report

Type

|

NetvoxPayLoadData

---|---|---|---
 |  |  | SoftwareVersion|  | DateCode|
 |  |  |  | HardwareVersion|  | Reserved
 |  | 0x00| (1Byte)|  | (4Bytes,|
 |  |  |  | (1Byte)|  | (2Bytes,fixed 0x00)
 |  |  | Eg.0x0A—V1.0|  | eg 0x20170503)|
 |  |  | Battery| Current1| Current2| Current3| Mulitplier1(1Byte),
 |  | 0x01| (1Byte,| (2Bytes,| (2Bytes,| (2Bytes,| the real current1 should convert with

R718N3xxx(E)

Series

|

0x4A

|  | unit:0.1V)| unit:1mA)| unit:1mA)| unit:1mA)| Current Mulitplier
 |  | Mulitplier2| Mulitplier3|
 |  |  | Battery| (1Byte),| (1Byte),|
 |  |  |  |  |  | Reserved
 |  | 0x02| (1Byte,| the real current2| the real current3|
 |  |  |  |  |  | (5Bytes,fixed 0x00)
 |  |  | unit:0.1V)| should convert with| should convert with|
 |  |  |  | Current Mulitplier| Current* Mulitplier|
 |  |  | Battery| Current1| Current2| Current3| Multiplier (1Byte),
 |  | 0x03|  |  |  |  |
 |  |  | (1Byte,| (2Bytes,| (2Bytes,| (2Bytes,| BIT0-1:
 |  |  | unit:0.1V)| Unit:1ma)| Unit:1ma)| Unit:1ma)| Multiplier1(0b00_1,0b01_5,0b10_10,0b11_100)

BIT2-3:

Multiplier2(0b00_1,0b01_5,0b10_10,0b11_100)

BIT4-5:

Multiplier3(0b00_1,0b01_5,0b10_10,0b11_100)

BIT6-7: Reserved

---|---|---|---|---|---|---|---

0x04

|

Battery(1Byte, unit:0.1V)

| ThresholdAlarm(1Byte, Bit0_LowCurrent1Alarm, Bit1HighCurrent1Alarm, Bit2 LowCurrent2Alarm, Bit3 HighCurrent2Alarm, Bit4 LowCurrent3Alarm, Bit5_ HighCurrent3Alarm,

Bit6-7:Reserved)

|

Reserved(5Bytes,fixed 0x00)

Uplink:

Data # 1 : 014A019F05DD05D405DE01

1. 1st byte (01): Version
2. 2nd byte (4A): DeviceType – R718N3xxx(E) Series
3. 3rd byte (01): ReportType
4. 4th byte (9F): Battery – 3.1V (low voltage) 9F (Hex) = 31 (Dec), 31* 0.1V = 3.1V
5. 5th-6th byte (05DD) : Current1 – 1501mA 05DD (Hex) = 1501 (Dec), 1501 1mA = 1501mA 7th-8th byte (05D4): Current2 – 1492mA 05D4 (Hex) = 1492 (Dec), 1492 1mA = 1492mA 9th-10th byte (05DE): Current3 – 1502mA 05DE (Hex) = 1502 (Dec), 1502* 1mA = 1502mA 11th byte (01): Multiplier1

Note:
The real Current1=Current1Mulitplier1 The real Current2=Current2Mulitplier2 The real Current3=Current3*Mulitplier3

Data # 2: 014A029F01010000000000

1. 1st byte (01): Version
2. 2nd byte(4A): DeviceType－ R718N3xxx(E) Series
3. 3rd byte (02): ReportType
4. 4th byte(9F) : Battery－3.1V (low voltage) 9F (Hex) = 31 (Dec), 31* 0.1V = 3.1V 5th byte (01): Multiplier2
5. 6th byte ( 01): Multiplier3
6. 7th-11th byte (0000000000): Reserved

Data # 3: 014A039F05C705D405F000

1. 1st byte (01): Version
2. 2nd byte(4A): DeviceType－ R718N3xxx(E) Series
3. 3rd byte (03): ReportType
4. 4th byte(9F): Battery－3.1V (low voltage) 9F (Hex) = 31 (Dec), 31* 0.1V = 3.1V
5. 5th-6th byte (05C7): Current1－1479mA 05C7(HEX)=1479(DEC),1479*1mA=1479mA
6. 7th-8th byte (05D4): Current2 – 1492mA 05D4(HEX)=1492(DEC),1492*1mA=1492mA
7. 9th-10th byte (05F0): Current3 – 1520mA 05F0(HEX)=1520(DEC),1520*1mA=1520mA

Data # 4: 014A049F01000000000000

1. 1st byte (01): Version
2. 2nd byte(4A): DeviceType－ R718N3xxx(E) Series
3. 3rd byte (04): ReportType
4. 4th byte(9F): Battery－3.1V (low voltage) 9F (Hex) = 31 (Dec), 31* 0.1V = 3.1V
5. 5th byte (01): ThresholdAlarm – LowCurrent1Alarm
6. 6th-11th byte (000000000000) : Reserved

Example of ConfigureCmd

FPort： 0x07

• CmdID – 1 byte
• DeviceType – 1 byte – Device Type of Device
• NetvoxPayLoadData– var bytes (Max=9bytes)

Description

|

Device

|

CmdID

| Device

Type

|

NetvoxPayLoadData

---|---|---|---|---
Config

ReportReq

|

R718N3xxx(E)

Series

|

0x01

|

0x4A

| MinTime

(2bytes Unit:s)

| MaxTime

(2bytes Unit:s)

| CurrentChange

(2byte Unit:1mA)

| Reserved

(3Bytes,Fixed 0x00)

Config

ReportRsp

|

0x81

| Status

(0x00_success)

| Reserved

(8Bytes,Fixed 0x00)

ReadConfig

ReportReq

|

0x02

| Reserved

(9Bytes,Fixed 0x00)

ReadConfig

ReportRsp

|

0x82

| MinTime

(2bytes Unit:s)

| MaxTime

(2bytes Unit:s)

| CurrentChange

(2byte Unit:1mA)

| Reserved

(3Bytes,Fixed 0x00)

1. Configure device parameters MinTime = 1min, MaxTime = 1min, CurrentChange = 100mA
2. Downlink: 014A003C003C0064000000 The device returns:

  * 814A000000000000000000 (Configuration successful)
  * 814A010000000000000000 (Configuration failed)

2. Read device configuration parameters

Downlink: 024A000000000000000000 The device returns:

• 824A003C003C0064000000 (Current device configuration parameters)

Example of SetRportType

Description

| ****

Device

| ****

CmdID

| Device

Type

| ****

NetvoxPayLoadData

---|---|---|---|---

SetRportTypeReq (REMAIN Lastconfig when resettofac)

| ****

R718N3xxx(E)

Series

| ****

0x03

| ****

0x4A

| ReportTypeSet (1Byte,0x00_reporttype1&2,

0x01_reporttype3)

| ****

Reserved (8Bytes,Fixed 0x00)

SetRportTypeRsp (REMAIN Lastconfig when resettofac)

| ****

0x83

| ****

Status

(0x00_success)

| ****

Reserved (8Bytes,Fixed 0x00)

GetRportTypeReq

| ****

0x04

| Reserved

(9Bytes,Fixed 0x00)

GetRportTypeRsp

| ****

0x84

| ReportTypeSet (1Byte,0x00_reporttype1&2,

0x01_reporttype3)

| ****

Reserved (2Bytes,Fixed 0x00)

(3) Configure ReportTypeSet =0x01

Downlink: 014A010000000000000000
// 0x01 Uplink return one packet.

The device returns:

• 834A000000000000000000 (Configuration successful)
• 834A010000000000000000 (Configuration failed)

Read device configuration parameters.

Downlink : 044A000000000000000000

The device returns:
844A010000000000000000 (Current device configuration parameters)

Example for MinTime/MaxTime logic
Example# 1 based on MinTime = 1 Hour, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange=0.1V

Note : MaxTime=MinTime. Data will only be report according to MaxTime (MinTime) duration regardless BatteryVoltageChange value.
Example#2 based on MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange= 0.1V.

Example#3 based on MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange= 0.1V.

Notes :

1. The device only wakes up and performs data sampling according to MinTime Interval. When it is sleeping, it does not collect data.
2. The data collected is compared with the last data reported. If the data variation is greater than the ReportableChange value, the device reports according to MinTime interval. If the data variation is not greater than the last data reported, the device reports according to the MaxTime interval.
3. We do not recommend setting the MinTime Interval value too low. If the MinTime Interval is too low, the device wakes up frequently and the battery will be drained soon.
4. Whenever the device sends a report, no matter the result from data variation, button pushed or MaxTime interval, another cycle of MinTime/MaxTime calculation is started.

Installation

1. The 3-phase current meter R718N3xxx(E) series has a built-in magnet (see Figure 1 below). It can be attached to the surface of an object with iron during installation, which is convenient and quick.
   To make the installation more secure, please use screws (purchased separately) to fix the device to the wall or other objects (such as the installation diagram).
   Note: Do not install the device in a metal-shielded box or in an environment surrounded by other electrical equipment to avoid affecting the wireless transmission of the device.

2. Open the clamp-on current transformer, and then pass the live wire through the current transformer according to the installation.
   Note: “L←K” is marked on the bottom of the CT.

3. Precautions:

   • Before using, the user must check whether the appearance is deformed; otherwise, the test accuracy will be affected.
   • The using environment should be kept away from strong magnetic fields, so as not to affect the test accuracy. It is strictly forbidden to use in humid and corrosive gas environments.
   • Before installation, please confirm the current value of the load. If the current value of the load is higher than the measurement range, select a model with a higher measurement range.

4. The 3-phase current meter samples the current according to MinTime. If the current value sampled this time relatively exceeds the set value (the default is 100mA) more than the current value reported last time, the device will immediately report the current value sampled this time. If the current variation does not exceed the default value, the data will be reported regularly according to MaxTime.

5. Press the [Key] of the device to start sampling data and report the data after 3 to 5 seconds.
   Note: MaxTime must be set to greater than MinTime.

The three-phase current detector R718N3xxx(E) is suitable for the following scenarios:

• School
• Factory
• Shopping mall
• Office building
• Smart building

Where the electrical data of the device with the three-phase electricity needs to be detected.

1. When using it, the back of it can be adsorbed on the iron surface, or the two ends can be fixed to the wall with screws.
2. When installing the R718N3xxx(E) series current transformer, please separate the live and neutral wires of the wire to be detected, and only take the live wire through current transformer and start the measurement according to the wiring below:
   If the live wire and the neutral wire are connected together at the same time, they will offset each other and the measurement is 0.

Note:

1. Please do not disassemble the device unless it is required to replace the batteries.
2. Do not touch the waterproof gasket, LED indicator light, or function keys when replacing the batteries. Please use a suitable screwdriver to tighten the screws (if using an electric screwdriver, it is recommended to set the torque as 4kgf) to ensure the device is impermeable.

Information about Battery Passivation

Many Netvox devices are powered by 3.6V ER14505 Li-SOCl2 (lithium-thionyl chloride) batteries that offer many advantages including low self-discharge rate and high energy density. However, primary lithium batteries like Li-SOCl2 batteries will form a passivation layer as a reaction between the lithium anode and thionyl chloride if they are in storage for a long time or if the storage temperature is too high. This lithium chloride layer prevents rapid self-discharge caused by continuous reactions between lithium and thionyl chloride, but battery passivation may also lead to voltage delay when the batteries are put into operation, and our devices may not work correctly in this situation.

As a result, please make sure to source batteries from reliable vendors, and it is suggested that if the storage period is more than one month from the date of battery production, all the batteries should be activated. If encountering the situation of battery passivation, users can activate the battery to eliminate the battery hysteresis.

ER14505 Battery Passivation

To determine whether a battery requires activation
Connect a new ER14505 battery to a resistor in parallel, and check the voltage of the circuit. If the voltage is below 3.3V, it means the battery requires activation.

How to activate the battery

• a. Connect a battery to a resistor in parallel
• b. Keep the connection for 5~8 minutes
• c. The voltage of the circuit should be ≧3.3, indicating successful activation.

Note: If you buy batteries from other than the above four manufacturers, then the battery activation time, activation current, and required load resistance shall be mainly subject to the announcement of each manufacturer.

Important Maintenance Instruction

Kindly pay attention to the following to achieve the best maintenance of the product:

• Do not put the device near or submerge in water. Minerals in rain, moisture, and other liquids could cause corrosion of electronic components. Please dry the device, if it gets wet.
• Do not use or store the device in dusty or dirty environments to prevent damage to parts and electronic components.
• Do not store the device in high temperatures. This may shorten the lifespan of electronic components, damage batteries, and deform plastic parts.
• Do not store the device in cold temperatures. Moisture may damage circuit boards as the temperatures rise.
• Do not throw or cause other unnecessary shocks to the device. This may damage internal circuits and delicate components.
• Do not clean the device with strong chemicals, detergents, or strong detergents.
• Do not apply the device with paint. This may block detachable parts and cause malfunction.
• Do not dispose of batteries in a fire to prevent the explosion.

The instructions are applied to your device, battery, and accessories.
If any device is not working properly, please bring it to the nearest authorized service provider for repair.

FAQ

• Q: What is the battery life of the device?
  • A: The battery life is determined by sensor reporting frequency and other variables.
• Q: Can I use detachable CT cables with all models?
  • A: Detachable CT cables are available for R718N37, R718N37E, R718N315, and R718N315E models.
• Q: How does LoRaWAN ensure interoperability between devices and gateways from different manufacturers?
  • A: LoRaWAN uses LoRa technology to define end-to-end standard specifications.

References

• Netvox LoRaWAN Application Command
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