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EMT43x family · 4 DIN modules
EMT431
Three-phase power analyser in 4 DIN modules with auxiliary supply, Ethernet, Wi-Fi and touch display.
- Keeps measuring with the line off85–265 Vac or 90–350 Vdc auxiliary supply, 1500 V isolation.
- Class 0.2 S, always connectedRS485, Ethernet and Wi-Fi together, with web server and MQTT.
- Cloud-readyLogging to SD or USB; LoRa or 3 digital input expansion.
Class 0.2 Sactive energy
6400samples/s at 50 Hz
4 modulesDIN · 90×61×72 mm
63°harmonic (FULL)
Technical specifications
Technical data
The boxes highlighted in green are specific to the EMT431; the others are common to the whole EMT43x family.
Power supplyEMT431 only
- Type
- Auxiliary, single-phase from the grey terminal
- Voltage
- 85–265 Vac · 90–350 Vdc
- Consumption
- < 3,5 W
Insulation and expansionsEMT431 only
- Power supply / measuring inputs
- 1500 V
- RS485 / measuring inputs
- 4 kV
- Power supply / RS485
- 4 kV
- Expansion (optional)
- LoRa or 3 digital inputs up to 3.2 kHz (dry contact or NPN, max 24 Vdc)
Measuring inputs
- Rated voltage
- 85–265 Vac L-N · 150–450 Vac L-L
- Operating frequency
- DC / 1–65 Hz
- .I input (current-output CT)
- In 5 A (or 1 A) · Imax 6 A · starting current 5 mA · < 1 VA per phase · overload 40 A for 500 ms
- .V input (333 mV / Rogowski)
- Vn 333 mV · Vmax 500 mV · 220 kΩ · built-in integrator for Rogowski coils
- Measurement type
- TRMS · 6400 samples/s at 50 Hz, 7680 at 60 Hz
Accuracy (25 ± 5 °C, 50 Hz)
- Active energy
- Class 0.2 S (EN 62053-22) · class C (EN 50470-1/3)
- Reactive energy
- Class 0.5 S (EN 62053-24)
- Voltage · current
- ± 0.1 % rdg
- Power
- ± 0.1 % rdg (5–100 % In) · ± 0.2 % rdg (1–5 % In)
- Frequency
- ± 0,01 Hz (45–65 Hz)
- THD · harmonics
- ± 0.3 % · magnitude ± 1 % up to the 16th, ± 2 % up to the 63rd
Communication and outputs
- RS485
- Modbus RTU · 1200–115,200 baud · up to 247 addresses
- Ethernet
- 10/100 Mbit/s · Modbus TCP, HTTP, MQTT, SNTP · up to 10 clients
- Wi-Fi
- 2.4 GHz 802.11 b/g/n · Modbus TCP, HTTP, MQTT · station and access point
- NFC · USB · SD
- Configuration, time-stamped logging to SD, USB or internal memory
- Digital output
- 1 solid-state (opto-MOS) · < 40 V, < 100 mA · alarm or pulses/kWh
- Configuration
- Built-in web server and app · from cloud (FULL)
General
- Display
- 2.2" colour 320×240, capacitive touch
- Dimensions
- 90×61×72 mm · 4 DIN modules · grey PBT
- Protection rating
- IP20 · pollution degree 2
- Temperature
- Operating −25 to +65 °C · storage −40 to +85 °C
- Humidity · altitude
- 10–90 % non-condensing · up to 2000 m
- Measurement category
- CAT III 300 V
- Standards
- EN 61010-1, EN 61010-2-030 · EN 61000-4-2/3/4/5/6 · EN 55032 class B
Versions
BASE o FULL
Same hardware, same basic measurements. The FULL version adds power quality, logging, oscilloscope and cloud connection.
| Function | BASE | FULL |
|---|---|---|
| Real-time measurements: voltages, currents, power, cos φ, frequency | ||
| Bidirectional active, reactive and apparent energy counters | ||
| Average, maximum and minimum values, peaks and max demand | ||
| Voltage harmonics and current interharmonics up to the 63rd | — | |
| THD and TDD, distortion power factor, K-factor | — | |
| Power quality events: dips, undervoltages, overvoltages | — | |
| Measurement logging, exportable from the web server | — | |
| Oscilloscope via web server and RS485 | — | |
| MQTT and connection to Chronos Cloud | — |
Order codes
12 order codes for the EMT431
Choose the type of current sensor and the version, then press + to add the code to the quote request. Click a code to copy it.
| Input | Version | No expansion | LoRa | Digital inputs |
|---|---|---|---|---|
| I · TA 5 A (o 1 A) | BASE | EMT431.I.BASE | EMT431.I.BASE.LORA | EMT431.I.BASE.DIN |
| FULL | EMT431.I.FULL | EMT431.I.FULL.LORA | EMT431.I.FULL.DIN | |
| V · 333 mV CT or Rogowski | BASE | EMT431.V.BASE | EMT431.V.BASE.LORA | EMT431.V.BASE.DIN |
| FULL | EMT431.V.FULL | EMT431.V.FULL.LORA | EMT431.V.FULL.DIN |
Format: MODEL.INPUT.VERSION[.EXPANSION] · .LORA = LoRa expansion · .DIN = 3 digital inputs. Configurator and codes for all EMT models →
Current sensors
Compatible sensors
The sensor depends on the input chosen in the order code. With Chronos CTs the app corrects the signal's magnitude and phase shift.
.ICTs with 5 A (or 1 A) output
KCTSplit-core · Ø 16–36 mm · 100–400 A
CP-62/30Ring-type Ø 30 mm · 100–200 A
HKSplit-core window · 100–600 A
Downloads
Documentation
Typical applications
Where the EMT431 is used
Main plant switchboardsLines that are not always energisedSub-metering and cost allocation
Other models
Contact
Talk directly to the people who design.
No call centre: your request goes to an engineer in our technical department.
- Non-disclosure agreement (NDA) before discussing your project
- EMT and sensor samples for evaluation on request
Phone +39 049 227 4996
Operating office Via Ceresina 11/E, Selvazzano Dentro (PD), Italy