IEEE P421.6/D5, Jan 2017
IEEE Approved Draft Recommended Practice for the Specification and Design of Field Discharge Equipment for Synchronous Machines
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- Language: English
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About This Item
IEEE P421.6/D5, Jan 2017 is an approved draft recommended practice focused on the specification and design of field discharge equipment for synchronous machines. It provides technical direction for equipment used to control and dissipate stored magnetic energy during shutdown or fault conditions, helping engineers address performance and protection needs in power and energy applications. For projects involving rotating electrical machines, the document can support more consistent design decisions, testing, and procurement alignment.
IEEE P421.6/D5, Jan 2017 overview
This draft recommended practice addresses a specialized part of synchronous machine engineering: field discharge equipment and its role in safely managing the machine field after de-energization. IEEE P421.6/D5, Jan 2017 is relevant where design teams need clearer guidance on electrical ratings, device coordination, and practical installation considerations. As an IEEE technical document, it is intended to support consistency in how field discharge arrangements are specified and evaluated for industrial and utility-grade equipment.
Typical use cases
IEEE P421.6/D5, Jan 2017 is typically referenced when specifying field discharge equipment for synchronous generators, motors, or related machine systems in power generation and heavy industrial environments. It may be used during equipment design reviews, procurement documentation, and acceptance testing where the field circuit must be discharged in a controlled manner. The standard is also useful for engineering teams working on protection schemes, retrofit studies, or maintenance planning for synchronous machines.
Why this standard matters
Clear guidance on field discharge equipment helps reduce uncertainty in design and compliance decisions for synchronous machines. IEEE P421.6/D5, Jan 2017 can support safer shutdown behavior, better coordination with machine protection systems, and more consistent performance expectations across suppliers. For buyers and engineers, using a defined recommended practice helps improve specification quality, limit risk during commissioning, and create a more reliable basis for comparing equipment and test results.
- Field discharge equipment specification
- Synchronous machine design guidance
- Protection and shutdown coordination
- Testing and acceptance considerations
- Industrial and power system applications
- Publication Date: 2017
- Standard Status: Inactive
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications; Components, Circuits, Devices and Systems
- Official IEEE: Doi link
- This Version: P421.6 (2017)
- Previous Version: P421.6 (2016)
- Previous Version: P421.6 (2016)
- Previous Version: P421.6 (2015)
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