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AKM 46890/46812/48003 Resistance Thermometer (RTD)

Brand: Qualitrol Company

Resistance thermometer (RTD) with built-in heating element to simulate the measuring of winding temperatures within a transformer.

Provides an Analog (Pt100) output for remote indication and monitoring.

Choice of one or two RTD’s allows for an extra signal for indication or input to SCADA system.

Installed in a well (pocket) that allows exchanging units without draining the transformer tank.
Features
  • Integrated heating element enables accurate simulation of the average or hot spot temperature of the transformer winding
  • By disconnecting the heating element, the thermometer can directly measure the oil temperature
  • RTDs enable accurate measurements across an extremely large temperature range
  • Compact remote indication and monitoring
  • RTD output allows for temperature indication where it is most convenient
  • Choose between one or two RTD’s within the same transmitter in either PT100 (100O platinum) or CU10 (10O copper) resistance outputs
  • Units with 4-20 mA output can transmit signals over long distances
  • Weatherproof design and robust materials for long trouble-free life
  • Ventilated case is weatherproof according to DIN 40050 IP54 (NEMA 3S)
  • Die-cast aluminum case with thermosetting powder coat provides excellent protection in harsh environments

Specifications

Case

  • Die Cast Aluminum with ANSI #70 Light Grey Coating

Dielectric Strength

  • 2,000 Vac for One Minute

Electrical Connectors Type

  • Screw Terminals

Input Power

  • 24 Vdc - 46890 Series

Load

  • 600 ohms, Max.

Mounting

  • Side or Top Mount

Number of RTDs

  • 1 or 2

Output

  • 4-20 mA - 46890 Series

Sensor, Probe

  • Stainless Steel

Sensor, Probe Connection

  • Brass

Standard Operating Temperature

  • -40° to 70° C (-40° to 158° F) - 46812 / 46890 Series
  • -50° to 85° C (-58° to 185° F) - 46812 / 46890 Series

Tank Connection

  • 7/8”-14 UNF Male-2 - 48003, 44664 Series
  • G 1” Male - 48003, 44664 Series
  • G 3/4” Male - 48003, 44664 Series
  • M22

Weatherproof

  • DIN 40050 IP54 Compliant (NEMA 3S Equivalent)
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