NOVUS V10xC Telc Transformer User Guide

NOVUS V10xC Telc Transformer

SAFETY ALERTS

The symbols below are used throughout this manual to draw the user’s attention to valuable information related to device safety and use.

Safety recommendations must be followed to ensure personal safety and prevent damage to the equipment or system. If the equipment is used in a manner other than that specified in this manual, the safety precautions may not be effective.

PRESENTATION

Telik Trafo is the ideal device to actively monitor distribution transformers. You can use it to measure the transformer’s low voltage output directly. Furthermore, Telik Trafo has wireless communication, which allows you to send the collected data to monitoring and data analysis systems. Through this monitoring, it is possible to obtain information on the electrical quantities related to the operation of the transformer, such as voltage, current, power, power factor, and other variables. Since Telik Trafo provides more active monitoring of the network, this data allows operators of the electric power distribution systems to make more agile decisions and makes it possible to carry out other analyses involving quality indicators, loss location, and energy balance. Its native wireless communication allows it to be quickly deployed in the field. It does not require other communication infrastructure, such as large antennas. Also, the device is very compact. This makes it easier to install and it is visually neutral near the transformer, which avoids attracting the attention of vandals and others.

IDENTIFICATION

OVERVIEW

Telik Trafo is a device made of flame-retardant and UV-resistant material in gray. It has inputs for measuring phase voltage and current:

• Voltage measurement input: It has 4 wires, corresponding to the 3 phases and neutral.
• Current measurement input: It has 3 Rogowski coil sensors, 1 sensor for each phase.

Current is measured indirectly using Rogowski coils. Voltage is measured directly. Thus, the device’s voltage input wires must be connected to the low voltage conductors of the distribution network, by the utility’s connection standard. The device is powered via the voltage measurement input. The device also has 2 LEDs on the bottom of the housing (see LEDS section). They indicate the correct functioning of the Telik Trafo. There are also internal circuits that use an anti-tamper system to identify attempts to tamper with the device. The figure below shows an overview of the device:

IDENTIFICATION
The model identification is described on the label attached to the right side of the housing. This label also contains information about the power supply and the serial number, as shown in the figure below:

LEDS
Telik Trafo has 2 LEDs, located at the bottom of the housing, as shown in the figure below:

The operation and description of each LED is described below:

STATUS

|

Green

| Off| Device off.
On| Device on.

COMMUNICATION INDICATOR

|

Red

| 1 blink every 2 seconds| Telik Trafo is connected to the MQTT Broker.
1 blink every 0.6 seconds| Telik Trafo is not connected to a Wi-Fi or mobile network.
1 blink every 0.2 seconds| Telik Trafo is not connected to a Wi-Fi or mobile network, nor to a MQTT Broker.

INSTALLATION

ELECTRICAL INSTALLATION
The device has 2 sets of wires for measuring voltage and current. The individual wires are used to read the voltage (see VOLTAGE AND CURRENT CONNECTIONS section). The blue wire must be connected directly to the system’s neutral. The black, yellow, and red wires must be connected directly to each of the transformer’s available phases. Rogowski coils (see ROGOWSKI COIL CONNECTIONS section) must be connected indirectly to their respective phases, identified by the colors black, yellow, and red. The conductor must be passed through the coil, as shown in Figure 5.

VOLTAGE AND CURRENT CONNECTIONS
The figure below shows how to make the voltage and current connections on the phases and neutral of the transformer’s output:

ROGOWSKI COIL CONNECTIONS
When installing Rogowski coils, you must observe the arrow indicating the direction of the current. It must correspond to the current output of the transformer, as shown in the figure below:

The coils are identified by color:

For the Rogowski coil to provide the most accurate current measurement, it is important to center the conductor in the coil. The figure below shows the typical accuracy for each position in which the conductor is located:

GENERAL RECOMMENDATIONS
To calculate energy, power, and power factor, you must reconcile the phase of the voltage with the phase of the current, according to the colors of the phases. To ensure proper functioning of the system, the neutral must be correctly connected to the transformer’s neutral. The device is powered between neutral and any of the phases it is connected to.

• You must never connect the neutral wire to one of the transformer’s phases, as this could burn out the device.

MECHANICAL INSTALLATION
Telik Trafo is designed to be installed on poles, next to transformers. The device has flaps at the top and bottom. They allow metal straps to be used to secure the device through the holes shown in the figure below:

DIMENSIONS
Telik Trafo has the following dimensions:

SIM CARD
Telik Trafo supports a SIM card, which is used to connect the device to an LTE network. The SIM card slot is on the inside of the device. To access it, remove the 4 screws from the bottom and then remove the protective cover, as shown in the figure below:

• Before installing the SIM card, you must ensure that the device is disconnected from the mains. Otherwise, the internal parts pose a risk of electric shock. Once the SIM card has been installed, it must be configured according to the instructions in the NETWORK CONFIGURATION section, available in the CONFIGURATION SOFTWARE chapter.

COMMUNICATION INTERFACES

WI-FI INTERFACE
Telik Trafo has a Wi-Fi interface that operates at 2.4 GHz. Each Telik Trafo unit has its own network. The Wi-Fi connection must be used to configure and locally collect the data recorded in the device’s internal memory. This connection supports a maximum distance of 10 meters and is available for up to 30 minutes. It is configured via software (see CONFIGURATION SOFTWARE chapter).

MOBILE INTERFACE
Telik Trafo has an interface with LTE CAT M1, NBIoT, and 2 G connection. The standard connection is LTE CAT M1 or NBIoT. When there are no other connections available, there will be a fallback to 2 G. This connection mode is used to perform Telik Trafo’s main activity: Actively monitoring distribution transformers.

CONFIGURATION SOFTWARE AND LOCAL DATA DOWNLOAD
To configure and collect the device’s data locally, use the Telik Trafo software. Using the Wi-Fi connection of a smartphone or computer, it is possible to analyze the variables measured and calculated in real time, as well as configure the device and collect the data stored in the internal memory.

CONNECTING
To make the connection, you need to be close to the device (at least 10 meters in the open). Then follow the steps below:

1. Scan the available Wi-Fi networks and connect to the network with the name (SSID) “TELIK-TRAFO-**” (the asterisks refer to the identifying digits of each device (ID)). The password for connecting to the network is the device ID. That is, the numbers displayed after the last hyphen in the network SSID.
2. From the Wi-Fi network connection, open an Internet browser and type in the following address: “192.168.4.1”. This address will display a web page. In it, you can perform all the actions already mentioned (see CONFIGURING THE DEVICE section).

This connection will be active for a maximum of 30 minutes. After this time has elapsed, the Wi-Fi AP mode will be switched off. To restart AP mode, de- energize the Telik Trafo and wait until the Status LED remains off. Due to the performance of the power backup system, this may take a few minutes.

CLOUD SOFTWARE
Telik Trafo has a cloud connection system via MQTT (Message Queuing Telemetry Transport) protocol in version V3.1.1 (see MQTT PROTOCOL chapter). Through a communication interface, preferably cellular, this protocol allows interaction with monitoring and management systems hosted in the cloud. Telik Trafo can connect to software that supports MQTT. Each system has specific features for each case.

CONFIGURING THE DEVICE
To ensure that the device is configured correctly, it is necessary to follow the connection process and open the web page, as explained above. The following figures display the configuration screens of the software and provide more information about its parameters.

HOME SCREEN
This is Telik Trafo’s home screen. It displays information such as serial, firmware version, network status, IP address, among other data, as shown in the figure below:

None of the parameters on this screen can be modified.

NETWORK CONFIGURATION
This screen allows you to configure the network that will connect Telik Trafo to the cloud. This connection can be either Wi-Fi or LTE. If you check the option Select default network in the Connection parameter, the Wi-Fi network parameters will be displayed. If unchecked, the LTE connection parameters will be displayed.

WI-FI CONNECTION
On this screen, you can configure the Wi-Fi network and related information.

• Connection: Allows you to set this as the default connection mode for the device. If this option is unchecked, Telik Trafo will be configured via LTE connection (see section below).
• Wi-Fi: Allows you to enter the network data to which the device should connect.
  • Network: Name of the Wi-Fi network (SSID) to which Telik Trafo should connect.
  • Password: Wi-Fi network password.
• Settings: If you check the Use static IP option, allows you to manually configure the IP address.
  • IP address: IP address to which Telik Trafo should use to connect.
  • Subnet: Subnet to be used during the connection.
  • Gateway: Gateway to be used during the connection.
  • DNS1: DNS1 to be used during the connection.
  • DNS2: DNS2 to be used during the connection.
• Status: Displays the status of the device connection.

LTE CONNECTION
On this screen, you can configure the LTE connection and related information.

• Connection: Allows you to set this as the default connection mode for the device. If this option is unchecked, Telik Trafo will be configured via a Wi-Fi connection (see section above).
• Cellphone: Allows you to enter the data of the mobile network to which the device should connect.
  • APN: Access Point Name to which the device should connect.
  • User: Connection user.
  • Password: Connection password.
  • Technology: Technology to be used during the connection.
• SIM Card : Displays the status of the SIM card used.
• IMEI: Displays the IMEI number of the device.
• IMSI: Displays the IMSI number of the device.
• Operator: Displays the operator of the SIM card used.
• Status: Displays the status of the device connection.

MQTT CONNECTION CONFIGURATION
This screen allows you to configure the MQTT connection. Here, you can configure the credentials for the server. For more information on the MQTT protocol, see the MQTT PROTOCOL chapter.

• MQTT: Allows you to enter the MQTT connection data.
  • Server: Address of the MQTT server.
  • Port: Port of the MQTT server.
  • User: MQTT access user.
  • Password: MQTT access password.
  • Client ID: Identifier of the MQTT client.
  • Root topic: Allows you to configure the main topic, from which the others will be derived. Example: iot-2/novus/cmd.
  • Use TLS: Allows you to use the loaded security certificates. Clicking on the available option will take you to the FILES screen. There, you can upload the desired certificate.
• Status: Displays the status of the MQTT connection.

FILES
This screen allows you to load security certificates and check information about log files and storage space.

• Upload: By clicking on this button, you can upload security certificates. Once loaded, you must check the Use TLS option on the MQTT screen to allow them to be used.
• Process: Displays the status of the process currently in progress, be it uploading a certificate or downloading a log file.
• Certificates: Displays a list of certificates that can be used. By clicking on the Delete option, you can delete them.
• Memory: Displays the list of log files available for download. These files have the extension .log.
• Space: Displays the size of used and available memory.

FIRMWARE UPDATE
This screen allows you to update the device’s firmware, which is available for download on the product page (if necessary).

After uploading the required file and clicking the Update button, wait until the following message appears:

PERIODICITY OF SENDING DATA TO THE CLOUD
This screen allows you to configure the interval for sending monitoring data and information.

• Send Parameters: This allows you to configure the parameters for sending data from the device.
  • Monitoring: Interval for sending monitoring data. It accepts values from 0.1 to 1440 minutes. Default value: 5.0 minutes.
  • Information: Interval for sending information about network parameters and general settings. In minutes.
• Log Retention: This allows you to enable the creation of a log file, which will be updated according to the interval set in this parameter. If set to zero, this parameter will be disabled.

ADMINISTRATOR PREFERENCES
This screen allows you to configure your administrator preferences. You can change the password for the Wi-Fi network accessing Telik Trafo and the credentials for accessing the administrative screens.

MONITORING
This screen displays information about the instantaneous measurements of Telik Trafo.

None of the parameters on this screen can be modified.

MQTT PROTOCOL

Telik Trafo is compatible with the Message Queue Telemetry Transport (MQTT) protocol. This protocol is based on the Publish/Subscribe model for exchanging messages. As an MQTT Publisher/Subscriber, Telik Trafo requires a connection to an MQTT Broker. The Broker is responsible for sending the Publishers’ messages to the Subscribers. In addition, Telik Trafo can act as a Publisher (providing information, electrical measurements, and device status via 6 publication topics) and as a Subscriber (receiving parameter changes via 1 subscription topic and offering a level of remote control and parameterization).

BROKER MQTT CONFIGURATION
Telik Trafo can connect to a MQTT Broker with or without the use of TLS (Transport Layer Security), which is an additional security layer. This layer is useful for protecting the information exchanged between the device and the Broker.
By using TLS, Telik Trafo guarantees the security of the data being collected and sent. However, if security is not a critical factor, it is possible to connect without TLS, which allows for a faster and more efficient connection.

CONFIGURING THE BROKER USING TLS
To connect to the Broker using TLS, you need to check the Use TLS option in the MQTT section, as shown in the figure below:

CONFIGURING TLS CERTIFICATES
TLS (Transport Layer Security) certificates are a set of security protocols that provide privacy and data integrity during a device’s communication with the Internet. They are essential for guaranteeing the security of data transmitted between devices and servers.
To establish a secure connection with the MQTT Broker, Telik Trafo uses 3 certificates:

1. Client certificate (client.crt): This certificate represents Telik Trafo in the connection with the Broker and is used to identify it as a trusted device. It is generated by a Certificate Authority (CA) and contains information about the device, such as its name and IP address.
2. Client Private Key (client.key): The client’s private key is secret and encrypted information, generated at the same time as the client certificate. It is used to encrypt and decrypt information during the TLS connection.
3. CA Certificate (server.pem or server.crt): The Certificate Authority (CA) Certificate is used to verify the validity of the Client Certificate. It is a guarantee that the Client Certificate has been issued by a reliable and authorized source.

These certificates guarantee the security of the connection between Telik Trafo and MQTT Broker. You can see them in the Files section of the configuration software:

• Only certificates with the names “client.crt”, “client.key”, and “server.pem”/”server.crt” are accepted.

TOPIC TO SEND COMMANDS
This topic allows you to send commands and messages to Telik Trafo. Through it, you can remotely control the device and change its settings.

TOPIC: TELIK/ /CMD/SEND1

TOPIC TO RECEIVE GENERAL INFORMATION
This topic provides general information about Telik Trafo. Through it, you can obtain basic information about the device, such as its current configuration, status, and other relevant data.

TOPIC: TELIK/ /EVT/INFO2

1. Example of a topic for receiving the device information event:

TOPIC TO RECEIVE MONITORING DATA
This topic allows you to receive monitoring data from Telik Trafo. It allows you to monitor the network’s instantaneous electrical measurements.

TOPIC TO RECEIVE LAST GASP EVENTS
This topic allows you to receive the “last gasp” event of Telik Trafo. Through it, you can be notified when there is a power outage or when the power comes back on, if “lastgasp”: true (power outage), and “lastgasp”: is false (power comes back on).

TOPIC: TELIK/ /EVT/LASTGASP4

TOPIC TO RECEIVE CONFIGURATIONS
This topic allows you to receive configurations from Telik Trafo. It allows you to verify the current configurations of the device.

TOPIC: TELIK/ /EVT/CONFIG5

1. Example of a topic for receiving the current device settings event:

TOPIC TO RECEIVE UPDATE CONFIRMATIONS
This topic allows you to receive confirmation of an update.

TOPIC: TELIK//EVT/UPDATE6

TECHNICAL SPECIFICATION

FEATURES

GENERAL FEATURES

·     3 current input channels (indirect measurement via Rogowski coil).

Internal measurements| External power supply status
Nominal frequency| 50 Hz/60 Hz
Resolution| ·     Voltage channels: 0.01 Volts.

·     Current channels: 0.01 Amps.

Storage capacity| 13,000 logs (45 days of recording at 5 min intervals)
Recording interval| Configurable in minutes. Factory default: 5 minutes.
Logging mode| Circular buffer
Communication interfaces| ·     Cellular module (LTE Cat M1, NB IoT, 2 G) to publish data in the cloud.

·     Wi-Fi for local data collection and configuration.

Software| ·     It can be integrated with cloud systems.

·     Web page available via Wi-Fi interface for local data collection and configuration.

Power supply

| ****

Power supply

| ·      Automatic phase-neutral supply from one of the voltage measurement channels.

·      Range: 85 Vac to 285 Vac.

Energy backup| Internal/automatic auxiliary source for last gasp (sending the last publication when there is a power outage)
Operating temperature| Using power supply: -10 to 60 °C (14 to 140 °F)
Storage temperature| -40 to 85 °C (-40 to 185 °F)
Housing| Polycarbonate (V0 flame retardant and anti-UVA/UVB material)
Protection index| IP65
Dimensions| 202 x 143 x 85 mm

ELECTRICAL FEATURES

·     3 current input channels (indirect measurement via Rogowski coil).

 | Internal measurements| External power supply status
 | Nominal frequency| 50 Hz/60 Hz
 | Resolution| ·     Voltage channels: 0.01 Volts.

·     Current channels: 0.01 Amps.

 | Storage capacity| 13,000 logs (45 days of recording at 5 min intervals)
 | Recording interval| Configurable in minutes. Factory default: 5 minutes.
 | Logging mode| Circular buffer
 | Communication interfaces| ·     Cellular module (LTE Cat M1, NB IoT, 2 G) to publish data in the cloud.

·     Wi-Fi for local data collection and configuration.

 | Software| ·     It can be integrated with cloud systems.

·     Web page available via Wi-Fi interface for local data collection and configuration.

 | ****

Power supply

| ****

Power supply

| ·      Automatic phase-neutral supply from one of the voltage measurement channels.

·      Range: 85 Vac to 285 Vac.

 | Energy backup| Internal/automatic auxiliary source for last gasp (sending the last publication when there is a power outage)
 | Operating temperature| Using power supply: -10 to 60 °C (14 to 140 °F)
 | Storage temperature| -40 to 85 °C (-40 to 185 °F)
 | Housing| Polycarbonate (V0 flame retardant and anti-UVA/UVB material)
 | Protection index| IP65
 | Dimensions| 202 x 143 x 85 mm
FEATURES| TELIK TRAFO|
Power supply| ·     Self-powered by the measurement channels.

·     Range: 85 Vac to 285 Vac (phase-neutral).

|
Voltage measurement limits| ·     0 Vac to 285 Vac (phase-neutral).

·     0 Vac to 493 Vac (phase-phase).

|
Current measurement limits| 2 A to 1,000 A (indirect measurement by Rogowski coil)|
Number of elements| 3|
Number of wires| 4|
Consumption| Smaller than 10 W|
Insulation class of measurement sensors| Cat-III/600 Vac|

CURRENT SENSORS – FEATURES

ACCURACY

POWER ACCURACY

15 A

| 1 FP| ± 4 %| – –
0.5 i| ± 4 %| ± 4 %
0.8 c| ± 4 %| ± 4 %

30 A

| 1 FP| ± 4 %| – –
0.5 i| ± 4 %| ± 4 %
0.8 c| ± 4 %| ± 4 %

100 A

| 1 FP| ± 2 %| – –
0.5 i| ± 2 %| ± 2 %
0.8 c| ± 2 %| ± 2 %

200 A

| 1 FP| ± 2 %| – –
0.5 i| ± 2 %| ± 2 %
0.8 c| ± 2 %| ± 2 %

300 A

| 1 FP| ± 2 %| – –
0.5 i| ± 2 %| ± 2 %
0.8 c| ± 2 %| ± 2 %

600 A

| 1 FP| ± 2 %| – –
0.5 i| ± 2 %| ± 2 %
0.8 c| ± 2 %| ± 2 %

1000 A

| 1 FP| ± 2 %| – –
0.5 i| ± 2 %| ± 2 %
0.8 c| ± 2 %| ± 2 %

ENERGY ACCURACY

CURRENT RANGE| POWER FACTOR| ACCURACY (WH)| ACCURACY (VARH)
---|---|---|---

15 A

| 1 FP| ± 4 %| – –
0.5 i| ± 4 %| ± 4 %
0.8 c| ± 4 %| ± 4 %

30 A

| 1 FP| ± 4 %| – –
0.5 i| ± 4 %| ± 4 %
0.8 c| ± 4 %| ± 4 %

100 A

| 1 FP| ± 2 %| – –
0.5 i| ± 2 %| ± 2 %
0.8 c| ± 2 %| ± 2 %
CURRENT RANGE| POWER FACTOR| ACCURACY (WH)| ACCURACY (VARH)
---|---|---|---

200 A

| 1 FP| ± 2 %| – –
0.5 i| ± 2 %| ± 2 %
0.8 c| ± 2 %| ± 2 %

300 A

| 1 FP| ± 2 %| – –
0.5 i| ± 2 %| ± 2 %
0.8 c| ± 2 %| ± 2 %

600 A

| 1 FP| ± 2 %| – –
0.5 i| ± 2 %| ± 2 %
0.8 c| ± 2 %| ± 2 %

1000 A

| 1 FP| ± 2 %| – –
0.5 i| ± 2 %| ± 2 %
0.8 c| ± 2 %| ± 2 %

CURRENT ACCURACY

VOLTAGE ACCURACY

MEASUREMENTS

Power

| ·     Active 3Ø (kW)

·     Reactive 3Ø (kVAr)

·     Apparent 3Ø (kVA)

Power factor| 3Ø and total

Energies

| ·      Direct active and total reverse (kWh)

·      Direct capacitive reactance and total reverse (kVAh)

·      Direct inductive reactance and total reverse (kVAh)

WIRELESS CONNECTIVITY
Telik Trafo has a wireless connectivity module to communicate with Wi-Fi and mobile network operators. It uses a cellular module that offers data connectivity over LTE Cat M1 and LTE Cat NB1/2 (NB IoT) and GSM (GPRS and EDGE) to connect with cloud systems. In addition, it also uses a Wi-Fi connectivity module, which provides Wi-Fi connectivity for local configuration and collection of data.

dB

LTE Cat M1

| 700 MHz (Bd12, Bd13, Bd14, Bd28, Bd85), 800 MHz (Bd18, Bd19, Bd20, Bd26, Bd27), 850 MHz (Bd5), 900 MHz (Bd8), 1700 MHz (Bd66), AWS (Bd4), 1800 MHz (Bd3), 1900 MHz (Bd2, Bd25), 2100 MHz (Bd1)|

20 dBm ± 2 dB

LTE Cat NB1/2

| 600 MHz (Bd71), 700 MHz (Bd12, Bd13, Bd28, Bd85), 800 MHz (Bd18, Bd19, Bd20, Bd26), 850 MHz (Bd5), 900 MHz (Bd8), 1700 MHz (Bd66), AWS (Bd4), 1800 MHz (Bd3), 1900 MHz (Bd2, Bd25), 2100 MHz (Bd1)|

20 dBm ± 2 dB

Table 10 – Supported mobile phone connectivity technologies and bands

PARAMETER| CONDITION| MINIMUM| TYPICAL| MAXIMUM| UNIT
---|---|---|---|---|---
Central operating frequency| –| 2412| –| 2484| MHz

Transmission power

| 11n, MCS7| 12| 13| 14| dBm
11b mode| 17,5| 18,5| 20| dBm

Reception sensitivity

| 11b, 1 Mbps| –| -98| –| dBm
11b, 11 Mbps| –| -89| –| dBm
11g, 6 Mbps| –| -92| –| dBm
11g, 54 Mbps| –| -74| –| dBm
11n, HT20, MCS0| –| -91| –| dBm
11n, HT20, MCS7| –| -71| –| dBm
11n, HT40, MCS0| –| -89| –| dBm
11n, HT40, MCS7| –| -69| –| dBm

Table 11 – Supported Wi-Fi connectivity technologies and bands

CERTIFICATIONS
Telik Trafo has cellular and Wi-Fi communication modules certified by ANATEL. The EXS82-W cellular module has the following certification number: 02604-20-05015. The Wi-Fi communication module has the following certification number: 02152-20-11541.

ANATEL
This device is homologated by ANATEL, according to the regulated procedures for conformity assessment of telecommunications products, and meets the technical requirements applied. It uses cellular and Wi-Fi communication modules that are also certified by ANATEL. The EXS82-W cellular module has certification number 02604-20-05015. The Wi-Fi communication module has certification number 02152-20-11541. This equipment is not subject to protection from harmful interference and may not cause interference with duly authorized systems  For more information, see the ANATEL website: www.gov.br/anatel.

WARRANTY

Warranty conditions are available on our website www.novusautomation.com/warranty.

References

• Anatel — Agência Nacional de Telecomunicações

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