WHITEPAPER: TMx Series Installation Guide

The TM8 On-Line Gas Chromatography DGA Monitor from Serveron Corp. is a remotely deployed laboratory-grade gas chromatograph which can be safely installed onto an energized or non-energized transformer. The monitor is designed to detect and measure fault gases found in an electrical power transformer‘s insulating oil. It is designed and constructed to resist environmental conditions relevant to a transformer substation. Serveron offers two versions of the TMx product. The TM8 measures eight IEEE-recommended fault gases: hydrogen (H2), oxygen (O2), carbon dioxide (CO2), carbon
monoxide (CO), methane (CH4), ethylene (C2H4), ethane (C2H6), and acetylene (C2H2). The TM3 measures the three Duval Triangle fault gases: methane (CH4), ethylene (C2H4), and acetylene (C2H2). The monitor may be used on conservator or nitrogen-blanketed transformers. The sample of gas is extracted directly from the oil within the transformer. Oil is circulated from transformer, to the monitor and then returned to the transformer through ¼-inch O.D. stainless-steel tubing. Stainless-steel tubing is used in conjunction with compression fittings to minimize the risk of leaks. The monitor is equipped with an internal gas extraction system which removes dissolved gases from the circulating transformer oil. Helium is used as a carrier gas to help transport the extracted sample gases through the gas chromatograph.