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Appendix C
Innova Transformer Gas Tester (XT)
Overview
The Innova Transformer Gas Tester is factory configured to monitor for total
combustibles from the gas space of power transformers. If transformer
faults, such as overheating, hot spots, arcing or corona occur, various
combustible gases are generated. If left unchecked, gas can accumulate
creating a potential for explosion, failure of the transformer, significant
remediation costs and loss of electrical service.
The Innova Transformer Gas Tester is designed as an inspection tool to
determine if unacceptable levels of gas exist within the transformer. A
sample of gas is extracted from the headspace of the transformer by the
Innova Transformer Gas Tester with a 1:1 dilution fitting in place. If gas
levels exceed acceptable levels, additional inspection, including performing
a dissolved gas analysis, is required to determine fault condition and
appropriate action. If oxygen detection is required, an optional oxygen range
can be provided.
Detection Range
The Innova Transformer Gas Tester has two detection ranges: 0-100% LEL
and 0-10,000 ppm combustibles. An optional range of 0-30% oxygen can be
provided if requested.
Alarm Points
The alarm points for the combustibles (LEL) range are preset at 10% LEL
(WARN) and 50% LEL (ALARM). PPM combustibles alarms are set at
1000 and 5000 ppm. All alarms are completely user adjustable if alternate
alarm points are required. Refer to Chapter 4, Edit Alarms, for alarm
adjustment instructions.
The Innova Transformer Gas Tester can also be provided with an optional
oxygen channel. The oxygen channel has two user adjustable alarms, one
that activates at 19.5% decreasing oxygen and one that activates at 23.5%
increasing oxygen.
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