PT 100 Encapsulated Motors

PT 100 Encapsulated Motors

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  • Encapsulated Motors

    The PT100 is a precision platinum wire resistor that is specified occasionally as a temperature input for process control equipment. A jacketed control lead must be run from the PT100 lead to the above-ground equipment. The above-ground equipment is not available from Franklin Electric and is typically part of a custom panel or data acquisition system.

    PT100 sensor retrofit kits from Franklin Electric come with complete instructions and allow for easy field installation.

    To install the PT100 sensor bolt, remove the top end bell bolt that is opposite of the lead and replace it with the PT100 screw. Tighten the sensor bolt to the torque values shown below.

    • 6" PT100
    • 4 kW-45 kW: 54- 61 Nm
    • 8" PT100
    • 30 kW-45 kW: 54- 61 Nm
    • 55 kW-150 kW: 115- 122 Nm

    Franklin Electric does not offer the required sensing device, it is available from specialty dealers.

    Encapsulated Motors HiTemp

    It's ohmic resistance is proportional to the sensed temperature. The FE field replaceable PT100 is potted into a screw holding the upper end bell. Because of his remote position relative to the windings, the sensing relay should be adjusted according to the below table.

    To install the PT100 sensor bolt, remove the top end bell bolt that is opposite of the lead and replace it with the PT100 screw. Tighten the sensor bolt to the torque values shown below.

    • 6" PT100 HiTemp
    • 4 kW-30 kW: 54- 61 Nm
    • 8" PT100 HiTemp
    • 30 kW-110 kW: 115 - 122 Nm

    Franklin Electric does not offer the required sensing device, it is available from specialty dealers.

  • Encapsulated Motors Temperature Conditions

    ConditionsTemp. of the Water
    Without Motor Operation
    Max. Trip Temp. / Resistance Setting
    (for standard lead length)
    Motor operating at nameplate output
    with 0.16 m/sec flow past the motor
    10 °C40 °C / 115.5 Ω
    15 °C44 °C / 117.0 Ω
    20 °C48 °C / 118.6 Ω
    25 °C51 °C / 119.7 Ω
    30 °C55 °C / 121.3 Ω
    Motor that has been derated
    with 1 m/sec flow past the motor
    35 °C59 °C / 122.8 Ω
    40 °C63 °C / 124.3 Ω
    45 °C66 °C / 125.5 Ω
    50 °C70 °C / 127.0 Ω
    55 °C74 °C / 128.6 Ω
    60 °C78 °C / 130.1 Ω

    6" PT100 Standard Encapsulated Motors Model Numbers

    Kit NumberMotor TypeWire Insul.Max. Medium Temp.Lead [mm²]Lead Length [m]






    305 327 9036" all ratings ½ - 13 UNC
    Europe motors starting 07. 2002
    US Motors starting 11.2001 on
    Rubber60 °C3X0.510

    8" PT100 Standard Encapsulated Motors Model Numbers

    Kit NumberMotor TypeWire Insul.Max. Medium Temp.Lead [mm²]Lead Length [m]
    305 326 90230 - 45 kW (type 2.1)
    Rubber
    60 °C3X0.510
    305 326 90155 - 150 kW (type 1)
    Rubber
    60 °C3X0.510

    Encapsulated Motors HiTemp Temperature Conditions

    ConditionsTemp. of the Water
    Without Motor Operation
    Max. Trip Temp. / Resistance Setting
    Motor operating at nameplate output
    with 0.16 m/sec flow past the motor
    50 °C60 °C
    60 °C70 °C
    70 °C80 °C
    75 °C85 °C
    80 °C90 °C
    90 °C100 °C

    6" Encapsulated Motors HiTemp Model Numbers

    Kit NumberMotor TypeWire Insul.Max. Medium
    Temp.
    Lead
    [mm²]
    Lead Length
    [m]
    156 098 111K4 - 30 kWSilicone90 °C4X0.3510
    156 098 112KSilicone90 °C4X0.35130

    8" Encapsulated Motors HiTemp Model Numbers

    Kit NumberMotor TypeWire Insul.Max. Medium
    Temp.
    Lead
    [mm²]
    Lead Length
    [m]
    156 098 116K30 - 110 kW (type 1)Silicone90 °C4X0,3510
    156 098 117KSilicone90 °C4X0,35130