Luxtron ThermAsset2

Effective Fiber Optic Hot Spot Monitor and Controller for Power Transformers

The ThermAsset®2 is a much sought after addition to LumaSense's Luxtron product line, offering a primary controller to monitor hot spots, control cooling, and protection at a cost that is attractive to the apparatus engineers and system operators. Now available in your choice of 2, 4, 6, or 8 channel configurations, the ThermAsset2 offers full control with alarm status indicators for up to six customer-specific relay functions.

This controller offers many of the reliable and proven features found on LumaSense's WTS-22 systems, considered the standard for fiber optic temperature measurement of transformer windings in the Power Utility industry. The same-patented Fluoroptic® Thermometer (FOT) technology is employed using a lifetime LED light source to activate the sensors. The ThermAsset2 utilizes the LumaSense ruggedized probes, the toughest in the industry, which require no calibration over the life time of the transformer. The ThermAsset2 meets 3000V surge protection requirement (IEEE C37.90.1- 1989).

Small and medium size transformers often take the brunt of the load in an overload condition and thus are most likely to be damaged without proper control. It is well known and accepted, that winding hot spot temperature measurements are the only safe means to activate the cooling systems (fan and pumps) to provide transformer thermal protection from insulation damage. Conventional winding temperature indicators only "infer" the hot spot by measuring top oil temperature. The ThermAsset2 enables direct, real time, accurate measurement of transformer winding temperature thereby providing valuable input to calibrate thermal models and enable dynamic load control. The drift-free, calibration-free nature inherent in the Fluoroptic® technology makes these systems ideally suited for use in transformers and provides a cost effective and reliable means to help protect these valuable assets.

LumaSense's "ruggedized" probes, have become the industry standard for fiber optic probe construction for use in transformers. Based on the company's patented Fluoroptic technology, which is immune to EMI and high voltages, these probes are inherently safe, reliable and stable, and are built from materials designed to survive the life of a power transformer.

LumaSense Applications Engineers are available to work with OEMs and Utilities to facilitate the setup and integration of the company's ThermAsset®2 control system.

Features:

• Dynamic Loading
• Transformer Rating Verification
• Thermal Model Calibration and Recalibration
• Protect against Overloading
• Available with Up to 8 Channels

Specifications
Number of Channels	2, 4, 6, or 8
Measurement Range	-30 to +200° C
Accuracy	±2° C
Analog Output	0-1mA or 4-20mA (Optional)
Digital Communication	RS-232 and RS-485 available
Operating Environment	-40 to 70° C
Power	Universal AC and DC (90-265 VAC/DC)