IEEE C57.104-2008
Immersed Transformers
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About This Item
C57.104-2008 is a technical standard for immersed transformers, addressing practical guidance used in power, energy, and industry applications. It is relevant where transformer condition, insulation behavior, and operating performance need to be assessed in a consistent way. For organizations working with oil-immersed transformer assets, this standard supports better engineering decisions, maintenance planning, and risk awareness. As a superseded document, C57.104-2008 may still be referenced for legacy equipment and historical comparison.
Overview of C57.104-2008
The C57.104-2008 standard focuses on immersed transformers and the technical considerations that affect their serviceability in power systems. In this context, the document is typically used to support interpretation of transformer condition and to guide evaluation practices tied to insulation and operational reliability. It is especially useful when reviewing asset health in a utility or industrial environment where transformer performance has direct impact on continuity of service, equipment life, and maintenance priorities.
Typical use cases
This standard is commonly consulted for transformer condition assessment, maintenance planning, and engineering review of oil-immersed units in substations, industrial plants, and generation facilities. It may also support diagnostic workflows where equipment condition data must be interpreted consistently across similar assets. For teams responsible for high-voltage power equipment, C57.104-2008 can help frame decisions around inspection intervals, serviceability, and whether further testing or corrective action is warranted.
Why it matters
In transformer management, consistency matters because small changes in condition can affect reliability, safety, and outage risk. C57.104-2008 helps create a common basis for evaluating immersed transformers, which can improve communication between operators, maintenance staff, and procurement teams. It also supports more disciplined compliance and testing practices by reducing ambiguity in how condition-related information is handled. For legacy systems, this kind of reference can be valuable when comparing results over time.
- Immersed transformer condition guidance
- Insulation and reliability context
- Maintenance and diagnostics support
- Legacy asset reference value
- Power system equipment review
- Publication Date: 2009
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications
- Official IEEE: Doi link
- New Version Available: C57.104 (2019)
- This Version: C57.104 (2009)
- Previous Version: C57.104 (1992)
- Previous Version: C57.104 (1978)
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