EP4
IoT Monitoring for Dry-type Transformers
Thermal protection relay for dry-type transformers, with four PT100 inputs, cooling control and remote monitoring over Wi-Fi and Monitrafo.
At a glance
What it is for
Thermal protection and monitoring of dry-type transformers in electrical installations, with remote monitoring through Monitrafo.
What defines the choice
- Simultaneous display of 4 temperatures
- Built-in Wi-Fi with a 3 dBi antenna
- MQTT, Modbus RTU and DNP3, over Wi-Fi or serial
- Stores measurements while offline and sends them when it reconnects
- Universal 24 to 275 Vdc/Vac power supply and 37 mm depth
When to choose this model
When the dry-type transformer needs 4 temperature points and analog outputs. For 3 points, the EP3 IoT is enough; for up to 16 sensors, choose the EPU.
To configure your quote
Tell us the quantity and how the data will be integrated: through Monitrafo over Wi-Fi, or through the supervisory system serial network (Modbus or DNP3).
Description
The EP4 IOT Thermal Protection Relay has an integrated WiFi modem with a built-in 3 dBi antenna. When enabled by the user, this feature allows Internet connectivity. Once connected, the EP4 IOT immediately makes collected and measured data available on an MQTT broker server. This is accessible through the
MONITRAFO.com monitoring platform, where users can easily register, choose the plan that best meets their needs and configure projects with one or more substations or transformers.
This gives you full control to monitor all measured quantities, actuations, alarms, maintenance, transformer health and much more in real time. You can use the platform in any web browser or the MONITRAFO APP, available from the Play Store (Android) and the App Store (iOS).
The EP4 IOT uses the MQTT communication protocol, integrating with the MONITRAFO.com platform to provide comprehensive online monitoring of your transformer. It also integrates ARTIFICIAL INTELLIGENCE, MACHINE LEARNING, DATABASES, PROGRAMMABLE FUNCTIONS, CALCULATIONS AND NOTIFICATIONS, AND MAINTENANCE SCHEDULING tools.
If the Internet connection is lost, the EP4 IOT stores all measurements taken while communication was unavailable. When the connection is restored, data is sent to MONITRAFO.com and stored in a database for queries, calculations and other uses.
The API available on the platform can also be used to integrate the EP4 IOT with other platforms such as Azure, Google Cloud, AWS, IBM, SAP and others
Electron do Brasil's EP4 IoT monitors and protects dry-type transformers that form part of the power system in large electrical installations at facilities such as:
Industrial plants
Oil platforms
Electrical substations (low, medium and high voltage)
Commercial buildings
Shopping centers
Hospitals
Soccer stadiums
Medium-voltage switchgear rooms
Hydroelectric power plants
Wind farms
Solar power plants
The EP4 IoT Thermal Protection Relay is a reference for electrical industry professionals and researchers. It meets the technical specifications of the world's leading electric utilities and complies with ABNT NBR 5356-11, IEC 60076-11 and IEEE C57.12.01 requirements governing the use of accessories in temperature monitoring and thermal protection systems for dry-type transformers and/or transformers with epoxy resin cast windings.
Technical data
ANSI / IEEE Function
FUNCTION | FUNCTION |
|---|---|
2 | Time-delay Starting or Closing Relay |
11 | Multifunction Device. |
16S | Serial Data Communication Device. |
23 | Temperature Control Device. |
26 | Equipment Thermal Device. |
30 | Annunciator Relay. |
49T | Transformer Thermal Relay. |
74 | Alarm Relay. |
77 | Telemetering Device. |
94 | Digital Output for TRIP. |
HMI | Human-machine Interface. |
TCM | Trip Circuit Monitoring Scheme. |
Dimensions and Power Supply
• Compact device with a depth of 37 mm;
• Universal 24–275 VDC / VAC power supply;
Human-machine Interface (HMI)
• High-brightness red 3-digit numeric display;
• Simultaneous indication of the 4 monitored temperatures;
• 4 navigation keys;
• 13 front-panel LEDs for event indication;
• Intuitive menus for viewing and parameter configuration
Communication Protocols
• MQTT – TLS/SSL – WIFI
• DNP3 – Level 1 (SERIAL)
• DNP3 – Level 1 (TCP/IP) – WIFI
• Modbus-RTU (SERIAL)
• Modbus-RTU (TCP/IP) – WIFI
Communication Ports
Integrated WIFI modem
• 802.11 b/g/n/e/i standards;
• WPA/WPA2/WPA-Enterprise security protocol;
• AES/RSA/ECC/SHA encryption;
• Data rate up to 150 Mbps;
• Built-in 3 dBi antenna (decibels relative to isotropic);
• Transmit power up to 21 dBm (decibels relative to one milliwatt);
• Bluetooth
• Class 2 – 2.5 mW (4 dBm);
• FIPS encryption;
• Version 4.2 BR / EDR and BLE (Low Energy);
USB
• Version 2.0;
• Transfer rate: 480 Mbps;
• Type-C connector
RS-485
• ANSI/TIA/EIA-485-A standard;
• Max. 32 devices;
• Half duplex;
• Multipoint;
• Max. distance: 1,200 meters;
• 2 metallic wires;
• Automatic speed from 1,200 to 57,600 bps;
Measurement Input
• 4 temperature measurement inputs for 3-wire PT100 sensors (EN60751-DIN43760);
• Accuracy: 0.5% (FS)
• Temperature measurement range: 0°C to 200°C;
Digital Relay Outputs
• 01 relay (NO/NC) rated at 10 amperes for temperature alarm;
• 01 relay (NO/NC) rated at 10 amperes for FAN (cooling);
• 01 relay (NO/NC) rated at 10 amperes for TRIP (shutdown);
• 01 relay (NO/NC) rated at 10 amperes for fault indication (watchdog);
• Intuitive menus for viewing and parameter configuration.
Analog Output
• 01 analog output (active, 15 VDC), user-configurable for 0 to 1 mA, 0 to 5 mA, 0 to 10 mA, 0 to 20 mA or 4 to 20 mA;
Type Tests Passed
• Applied voltage (IEC 60255-5): 2 kV / 60 Hz / 1 min. (to ground);
• Impulse voltage (IEC 60255-5): 1.2/50 µs / 5 kV / 3 negative and 3 positive / 5-second interval;
• Electrostatic discharge (IEC 60255-22-2): Air discharge = 8 kV / Contact discharge = 6 kV;
• Radiated electromagnetic disturbance immunity (IEC61000-4-3): 80 to 1000 MHz / 10 V/m;
• Electrical fast transient immunity (IEC60255-22-4): Power supply/inputs/outputs = 4 kV / common mode 2 kV;
• Surge immunity (IEC60255-22-5): Phase/neutral 1 kV, 5 per polarity (±) – phase-to-ground/neutral-to-ground 2 kV, 5 per polarity (±);
• Conducted electromagnetic disturbance immunity (IEC61000-4-6): 0.15 to 80 MHz / 10 V/m;
• Climatic test (IEC60068-21-14): -40°C to +85°C / 72 hours;
• Vibration endurance (IEC60255-21-1): 3 axes / 10 to 150 Hz / 2 G / 160 min/axis;
• Vibration response (IEC60255-21-1): 3 axes / 0.075 mm at 10 to 58 Hz / 1 G from 58 to 150 Hz / 8 min/axis.
Applications
Downloads
Catalog
Manual
Quick guide
Drawing (DWG/PDF)
Register map
Certificate
Software
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