IEEE 958-2003

958-2003 is a technical standard for speed drives used on 2400 to 13,800 volt auxiliary systems in electric power generating stations. It addresses the electrical and operational requirements associated with applying drives to medium-voltage auxiliary equipment, where reliability, coordination, and safe performance are important. For power, energy and industry applications, this standard helps define a common basis for design and procurement of drive systems used in station service environments.

958-2003 overview

The purpose of 958-2003 is to provide a focused technical framework for speed drives operating on medium-voltage auxiliary systems in generating stations. Its context is the electrical infrastructure that supports plant operation rather than the main generation output itself. By addressing this equipment class directly, the standard supports more consistent engineering decisions around ratings, installation expectations, and system compatibility. For organizations handling station auxiliary power equipment, 958-2003 can serve as a useful reference during specification and review.

Typical use cases

This standard is typically relevant when selecting or evaluating speed drives for auxiliary motors and related station systems in electric power plants. It may be used for applications tied to pumps, fans, compressors, or other variable-speed loads operating on 2400 to 13,800 volt supplies. Engineers, maintenance teams, and procurement staff may consult 958-2003 when aligning drive requirements with existing medium-voltage distribution, ensuring that the equipment fits the electrical conditions of the generating station and its support systems.

Why this standard matters

In practice, 958-2003 matters because medium-voltage speed drives must be specified carefully to avoid compatibility issues, performance problems, and unnecessary downtime. A clear standard helps support consistent design choices, safer installation, and more reliable operation in generating station auxiliary systems. It can also improve procurement clarity by giving buyers and suppliers a common technical reference. For plant owners, this reduces risk when comparing equipment, planning upgrades, or checking that a drive meets the expected operating environment.

• Medium-voltage auxiliary drive applications
• 2400 to 13,800 volt system range
• Electric power generating station context
• Design, procurement, and compliance reference
• Support for reliable station auxiliary operation