810-1734-00 Rev A GAS-Guard 8 and GAS-Guard 3 Operations and Maintenance Guide
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Introduction
The Siemens GAS-Guard is an on-line laboratory-grade gas chromatograph. The GAS-Guard detects
and measures fault gases found in the cooling oil of power transformers. The GAS-Guard is designed
and constructed to operate under those environmental conditions typical of a power substation or
generating facility.
Figure 1: Siemens GAS-Guard