PC37.20.3/D11, Aug 2013 is a technical standard for enclosed interrupter switchgear in the 1 kV-38 kV range, providing guidance for power-system equipment used to switch and isolate medium-voltage circuits. It is relevant to engineering teams that need a consistent basis for design, ratings, and evaluation of this type of apparatus. For applications in power, energy, and industrial systems, PC37.20.3/D11, Aug 2013 helps define expectations around performance and application fit.

Overview of PC37.20.3/D11, Aug 2013

This standard addresses enclosed interrupter switchgear used in electrical distribution and related industrial power applications. Its technical context is medium-voltage equipment where switching, interruption, and enclosure performance must be considered together. PC37.20.3/D11, Aug 2013 is useful as a reference for understanding how this category of switchgear is defined and what engineering characteristics are typically expected. Because it is inactive, it is best viewed as a historical or legacy document for comparison and specification review.

Typical use cases

PC37.20.3/D11, Aug 2013 is commonly relevant when selecting or evaluating enclosed interrupter switchgear for substations, plant distribution lines, feeder switching, and industrial power centers. It may also be used when reviewing equipment for medium-voltage service where isolation and interruption functions are needed in a compact enclosure. Utilities, facility engineers, and procurement teams can use it to compare switchgear offerings, check technical alignment, and support documentation for legacy installations or replacement planning.

Why it matters

For enclosed interrupter switchgear, clear requirements help reduce ambiguity in design, procurement, and field application. PC37.20.3/D11, Aug 2013 supports more consistent interpretation of ratings, construction expectations, and performance-related criteria within the 1 kV-38 kV range. That consistency matters when matching equipment to system voltage, insulation, and operating duties. It can also help limit compatibility issues, improve review of supplier documentation, and support safer decisions when working with medium-voltage components.

• Enclosed interrupter switchgear, 1 kV-38 kV
• Medium-voltage power distribution context
• Legacy reference for equipment review
• Design, rating, and application comparison
• Useful for procurement and specification checks