GE HYDRAN M2 Measurement monitoring unit

　　Hydran M2 (Mark III) Enhanced DGA Monitoring for Transformers

　　Hydran M2 is a continuous online monitoring device for dissolved gases and moisture in oil, which can alert personnel in case of transformer failure. It provides critical monitoring information and minimizes the risk of unplanned downtime to the greatest extent possible.

　　By connecting additional sensors such as top and bottom tank oil temperature, transformer load, or ambient temperature, other signals related to DGA and humidity values can be captured and used for a more in-depth analysis of the condition of the transformer. These rich data can not only be transmitted through M2's extensive communication options, but also through IEEE ® The onboard computing is converted into useful information based on standard transformer mathematical models to provide further state information.

　　Main advantages

　　Continuously measure the dissolved fault gases and moisture in the oil to identify potential risks early on before they become critical transformer faults

　　• Use additional sensors (for load, oil temperature) and built-in sensors to expand monitoring capabilities based on IEEE standard transformer model calculations

　　• Wide range of communication options and protocols (including IEC) ® 61850 simplifies integration into SCADA or DCS systems

　　The third-generation validated design has a very large global installation base

　　• Support new low flammability ester based oils and mineral transformer insulation oils

　　Asset supervision

　　Easy to permanently install transformer oil valves on a single device. No additional pipelines or pumps are required. Input from other sensors

　　The gas sensor responds 100% to hydrogen gas (usually the fault gas) and is also sensitive to carbon monoxide (overheated paper), acetylene (arc), and ethylene (overheated oil), thus covering the main root cause of the fault

　　The moisture sensor measures the moisture in the oil, resulting in the degradation of insulation paper (producing CO+water) or gasket leakage.

　　Configurable alarm

　　When abnormal levels occur, an alarm will be triggered to detect faulty gas or moisture

　　Two alarm levels (one for alarms and one for alarms) can be set to display increasingly severe situations

　　The alarm can also be set at the following values: optional analog input card or optional calculation transformer model

　　Automatically self check once every 15 days. If a fault is detected, a service alert will be issued, including power failure, oil valve closure, sensor or battery replacement.

　　Mark III improvement

　　Thoroughly inspect and improve sensor durability, new electronic boards, and power supply to comply with RoHS standards, while enhancing equipment reliability and performance

　　Suitable for transformer insulation oil using minerals, but now there are also ester based oils (natural or synthetic) available

　　• Compatible with General Electric's highly acclaimed products Perception ™ The software is available for download, trend analysis, and analysis of transformer data

　　Transformer model

　　Hydran M2 provides services based on IEEE standards and relevant to on-site experience. They use input from available sensors and convert the received data into useful real-time information to further understand the overall health status of the transformer.

　　Possible model output examples:

　　• Expected winding hot spot temperature

　　• Paper humidity

　　• Moisture foaming temperature

　　• Insulation aging

　　• Overload capacity

　　• Cooling efficiency

　　OLTC temperature difference

hydranm2_gea12934a.pdf

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