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WEIDMANN Electrical Technology Inc.

United States
  • Booth: 1453

Technology solutions to better manage your transformer

Weidmann has over 140 years knowledge in the design, development and operation of transformers.  The InsuLogix® brand of transformer monitoring products and SmartInsulation™ consists of unique embedded sensors and monitors that provide cost-effective integrated solutions for delivering detailed, actionable information.

Brands: Transformer monitoring solutions, engineering services, oil testing services, and education


  • InsuLogix® RFM – Retrofittable Fault Detector for
    Alerts crews to transformer failure
    Easily installs into pole and pad mount distribution transformers
    Reduces outage time
    Retrofittable – no redesign or opening of tank
    Maintenance free

  • It is estimated that in the USA alone, tens of millions
    pole top transformers are not equipped with internal
    fault visual indicators, thus putting in danger the lives
    of personnel maintaining the distribution network.
    The InsuLogix® RFM is the only retrofittable pole
    top transformer fault detector designed to help the
    linemen determine if the transformer has an internal


    The primary function of the InsuLogix® RFM is to provide
    a visible external indication when arcing occurs inside
    the transformer tank. The device’s red indicator serves as
    confirmation that a fault has occurred within the transformer,
    and the unit should not be re-energized for safety reasons.
    The InsuLogix® RFM is sensitive enough to detect a pressure
    increase due to internal low energy arcing which can result
    from partial discharge, or high energy arcing resulting from
    short circuits between phases or between phase and ground.

    The InsuLogix® RFM will never activate during transformer
    testing, transport, or installation; and comes equipped with
    a pressure relief valve for release of internal tank pressure
    manually or automatically.


    The InsuLogix® RFM operates with a bellows mechanism
    resistant to vibration and temperatures. Each device is
    individually tested with five consecutive tests at three
    different pressure rates: 1.5, 5, and 14 psi/sec. Test
    certificates are available with each release upon request.


    Wide Calibration: For low energy arcs the flag triggers with
    any slow and progressive increase of the internal pressure
    of the transformer.

    Reduced Calibration: This type of calibration is immune to
    pressure increases due to temperature variation. Flag will
    not trigger as a result of low energy arcs.


    The InsuLogix® RFM can be used on pole-mount, pad mount
    distribution transformers and voltage regulators. For voltage
    regulators application the InsuLogix® RFM will be calibrated
    at 4.5 psi.


    For operations that need information on pole top
    transformer health transmitted in real time into the SCADA,
    Weidmann has developed a solution consisting of a wireless
    transmitter connected to the RFM. The RFM status can be
    transmitted to SCADA via modem or a radio transmitter.
    Moreover, where necessary, the transmitter can also
    transfer information such as transformer temperature and
    load. In the latter case, temperature and current additional
    sensors are required. Such solutions are recommended
    for pole top transformers located in highly populated areas
    and/or feeding critical buildings such as hospitals, schools,
    and government institutions. Contact Weidmann for more
    information on the integrated solution.

    Patented InsuLogix® RFM Overpressure Indicator

    * Patent # US 10,345,367 Bl

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For questions regarding the DISTRIBUTECH conference program please contact:  
Debbi Wells, CMP
Conference  Manager
Direct: 918-832-9265

For questions regarding the DISTRIBUTECH exhibit services please contact your Exhibit Services Manager at:
Direct: 253-212-2735

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