Weidman Insulogix T2

Weidman Insulogix T2

Power Transformer

Power transformers often take the brunt of an overload Condition. They are the most likely to be damaged without the appropriate control and protection.
Weidmann InsuLogix® T is designed to measure transformer winding hot spots in real time. The drift-free, re-calibration free and maintenance-free InsuLogix® T allows an optimized operation of the transformer at safe load capacity during normal and emergency conditions.


Channels 4, 8, 12, 16
Silica Fiber Core 200 um
Connectors ST
Protection Jackets PTFE sheath, PTFE spiral wrap
Measuring Range -40 to 200°C 
Accuracy* < +/- 1K
Resolution  0.1K
Measuring Time per Channel** 250 ms
Opperating Temperature -20 to 60°C
Storage Temperature -20 to 70°C
Light Source Lifetime Lifetime of the transformer
Humidity 95% RH non-condensing
Communication Ports

Factory Configuration:

  • USB, RS232, Etherne (Modbus TCP) for up to 8 channel devices
  • RS485 (Modbus RTU) for up to 16 channel devices
Analog Output 4-20 mA or 0-10 VDC,
configurable at factory
Relays 2 for temperature thresholds
System Fault Relay Dedicated system fault relay, for instrument and one relay, for probe operation
System Status Indicator LED
Data Recording 8GB MicroSD-Card or other
Instrument Mounting DIN Rail or standard mounting

* The “expanded uncertainty of measurement” is the Product of the reported standard deviation and the coverage factor k=2. It corresponds to a normal distribution to a coverage probability of approximately 95 %.
** Mean value. This value depends on the used sensor and its enviromental temperature.


  •  Easy integration of up to 16 channels
  • Rugged and easy to use
  • Small footprint
  • Possible Measuring range – 200 °C to + 300 °C
  • Possible standard deviation* +/- 1 K
  • USB/RS232/RS485 Modbus RTU interface
  • Analog output (0-10 V or 4-20 mA)
  • 4 relays


  • EHV/UHV/HVDC Transformers
  • Power Transformers
  • Distribution Transformers
  • Reactors, Generators
  • Load Tap Changers
  • Switchgear
  • Bus Bars