Transformer Monitors

Dissolved gas analysis (DGA) monitors are important tools for ensuring the power grid runs reliably and safely. They provide early detection of a wide range of transformer health problems and enable timely fault diagnosis to drive informed asset management and maintenance decisions.

A New Way For Infrared DGA

The Calisto R9 brings something new to the market of DGA monitors: long-term accuracy without calibration gas cylinders to manage. This breakthrough is achieved by combining a novel IR gas measurement technology with a game-changing calibration system that uses water vapor as a calibrant to maintain accuracy over time.

Calisto R9 combines these innovations with robust design features that have been continuously improved through many years of serving Calisto customers around the world. These include membrane extraction to keep the gas measurement system free of oil and oil vapors, our sludge-tolerant pump that eliminates the need for oil filtration, and precision thermal controls for DGA accuracy.

As you might expect, the next generation DGA monitor in the Calisto line measures the concentrations of fault gases, air components, and moisture dissolved in transformer insulating liquids.

CALISTO is a simple and reliable system for detecting transformer incipient faults at their earliest stage. It provides unequalled stability at low concentration levels and is field-installable in less than 2 hours. The monitor offers additional value through on-line monitoring of dissolved water and can be easily networked for monitoring entire substations. Used in conjunction with other MSS products, such as our Myrkos Portable Fault Gas Analyzer, CALISTO becomes a key element in managing critical transformers.

Calisto 2 is Morgan Schaffer’s newest innovation offering compelling value in transformer fault detection and monitoring.

Built to stand the rigours of the Australian climate and to give a maintenance-free 15 year life with no consumables or requirement to replace parts over that time, Calisto 2 offers extremely low whole-of-life cost.

Calisto 2 features unequalled performance and stability for the measurement of moisture and dissolved hydrogen (THE key gas for detecting incipient faults at their earliest stage).  It offers unrivalled 2 ppm resolution, 5% accuracy, superb stability of reading, and very fast response to issues (better than 90% of step change detected in just 60 minutes).

Calisto 2 also offers independent measurement of carbon monoxide, a gas often generated in large quantities when transformer cellulose overheats.

Calisto 2 features a very complete communications specification, including optional fibre and IEC61850, and is supplied standard with DNP3.0 and MODBUS communication protocols, thus allowing easy deployment within existing communications and SCADA networks.
It supports all oil types and has been a trusted monitor of choice for the past 15 years in the Australian region with over 17,000 in service in the world today!

Offered with a 30 month warranty, it is very proudly backed for life with exceptional application and field support by AVO New Zealand and Morgan Schaffer.

Judge for yourselves…ask to speak to one of our long-standing customers!

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Avoid what could become a costly transformer failure by choosing our new generation of multi-gas on-line monitors. The Calisto 5 is a powerful tool for transformer condition assessment.This generation of Calistos uses gas chromatography with proven reliable results.This is a physical method of separation in which the components to be separated are distributed between two phases, one of which is stationary (stationary phase) while the other moves in a definite direction (mobile phase).

Avoid what could become a costly transformer failure by choosing our new generation of multi-gas on-line monitors. The Calisto 9 is a powerful tool for transformer condition assessment.This generation of Calistos uses gas chromatography with proven reliable results.This is a physical method of separation in which the components to be separated are distributed between two phases, one of which is stationary (stationary phase) while the other moves in a definite direction (mobile phase).