EP3
IoT Monitoring for Dry-type Transformers
Thermal protection relay for dry-type transformers, with three PT100 inputs, cooling control and remote monitoring over Wi-Fi and Monitrafo.
Description
The EP3 IOT Thermal Protection Relay was developed to simultaneously supervise up to 3 (three) temperature channels. It is used to protect and monitor dry-type transformers, motors, bearings, machines and industrial processes, as specified in the ANSI table. The EP3 IOT is a high-precision, high-reliability instrument that controls alarms and shutdowns (TRIP), with time-delay options.
The EP3 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 EP3 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 EP3 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 EP3 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 EP3 IOT with other platforms such as Azure, Google Cloud, AWS, IBM, SAP and others.
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 3 monitored temperatures;
• 4 navigation keys;
• 11 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
o 802.11 b/g/n/e/i standards;
o WPA/WPA2/WPA-Enterprise security protocol;
o AES/RSA/ECC/SHA encryption;
o Data rate up to 150 Mbps;
o Built-in 3 dBi antenna (decibels relative to isotropic)
o Transmit power up to 21 dBm (decibels relative to one milliwatt);
Bluetooth
o Class 2 – 2.5 mW (4 dBm);
o FIPS encryption;
o Version 4.2 BR / EDR and BLE (Low Energy);
USB
o Version 2.0;
o Transfer rate: 480 Mbps;
o Type-C connector
RS 485
o ANSI/TIA/EIA-485-A standard;
o Max. 32 devices;
o Half duplex;
o Multipoint;
o Max. distance: 1,200 meters;
o 2 metallic wires;
o Automatic speed from 1,200 to 57,600 bps
Measurement Input
• 3 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 TRIP (shutdown);
• 01 relay (NO/NC) rated at 10 amperes for fault indication (watchdog);
• Intuitive menus for viewing and parameter configuration.
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
Drawing (DWG/PDF)
Register map
Software
Images
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