Conventional accessories

Temperature monitoring units 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. Our temperature monitoring unit DTI enables controlling alarms and cooling systems and continuously monitors any anomalous variation in the temperature in your transformer through PT100 temperature sensors and can detect up to a maximum of 4 temperatures simultaneously.

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Why buy

  • 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

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 displays with led 7 segments, 3-digit
Outputs4 relay NO_C_NC (250 V 5 A resistive load)
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
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

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