Accessories for smart transformers - eDevices

Temperature monitoring unit for dry-type transformers

Hospitals, data centers, and shopping malls are some of the examples where dry transformers are installed to minimize any risk of fire and power collapse. To secure these transformers’ reliable and safe service conditions, different accessories and safety devices are required.
Choose our temperature monitoring unit type eDTI, a digital version of the conventional unit, which enables continuous monitoring from remote of the transformer temperature and programming of the alarm set-up of the unit in use remotely from your computer through Modbus RTU protocol. Furthermore, the dedicated software allows you to collect information from up to 247 monitoring units at the same time.

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Why buy

  • Continuous online monitoring enables the end-users to adopt condition-based maintenance approach and driving asset health management remotely
  • Fast temperature variation diagnostics enables informed decision making
  • Two programmable signaling levels (Alarm – Trip)
  • Control of cooling fan system
  • Power supply: 24/230 V dc/ac ±15% 50-60 Hz


  • Dry-type transformers
  • Electric motors

Technical data at a glance

StandardsSecurity: EN 61010-1
EMC: EN 61000-4-2; EN 61000-4-3; EN 61000-4-4; EN 61000-4-5; EN 61000-4-11; EN 61000-6-4
Auxiliary power supply24/230 V ac/dc ±15% 50-60 Hz
Maximum absorption4 VA
Measure inputs3 – 4 inputs by RTD PT100 (max wire resitance 20 Ohm)
Interval of measure-30 °C / +220 °C / precision ± 2°C
Interval of visualization-30 °C / +220 °C
Tripped delay-hysteresis5 seconds and -2 °C
Measure visualization2 displayes with led 7 segments, 3-digit
Outputs4 relay NO_C_NC (250 V 5 A resistive load), 0-20 mA or 4-20 mA (Default); Modbus RTU
Output functionsAlarm, trip, fan, auto-diagnostic
Programmable functionsALARM, TRIP, HOLD, FAN, T.MAX., HOT, FDC
ConnectionExtractible terminal with screws, section wires max 2.5 mm2
Insulation2500 Vrms 50 Hz per 60 s: U aux – input PT100 / U aux – relay outputs / inputs PT100 – relay outputs
Protection degreeIP52 front panel, IP20 rear panel, compliant with CEI-EN 60529
Dimensions – enclosureFlash mounting DIN 96×96 mm, depth 120 mm/ Enclosure thermoplastic self-extinguishing as UL94 VO
Working environmentFrom -10 °C to + 60 °C, humidity max 95%
Storing temperatureFrom +25 °C to +70 °C
Management softwareContact our

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