PC37.20.3/D9, Mar 2013 is a technical standard for enclosed interrupter switchgear in the 1 kV to 38 kV range, with emphasis on equipment used in power and energy applications. It provides a focused reference for design, ratings, and performance expectations where medium-voltage switching and interruption must be controlled reliably. For engineers, buyers, and compliance teams, PC37.20.3/D9, Mar 2013 helps define what should be considered when specifying switchgear for safe and consistent operation.

About PC37.20.3/D9, Mar 2013

This standard addresses enclosed interrupter switchgear as used in electrical systems between 1 kV and 38 kV. It is relevant to components, circuits, devices, and systems where switching and interruption functions need a defined technical basis. PC37.20.3/D9, Mar 2013 is useful when comparing equipment designs, evaluating ratings, and aligning procurement or engineering requirements with a recognized document. Its focus supports clearer specification of enclosure-related and interrupting performance considerations.

Where is PC37.20.3/D9, Mar 2013 used?

PC37.20.3/D9, Mar 2013 is commonly used in medium-voltage power distribution environments that rely on enclosed interrupter switchgear to control feeders, protect equipment, or isolate sections of a system. It may apply in utility substations, industrial plants, and other facilities where 1 kV to 38 kV switchgear forms part of the electrical infrastructure. The standard is also relevant during equipment selection, specification review, and acceptance testing for switchgear assemblies.

Importance in practice

In practice, PC37.20.3/D9, Mar 2013 matters because it helps reduce ambiguity in the design and evaluation of enclosed interrupter switchgear. A clear technical reference supports safer application, more consistent procurement, and better alignment between specified ratings and actual equipment performance. It can also assist with compliance checks and testing decisions by giving stakeholders a common basis for comparing products and verifying that switchgear is suitable for the intended medium-voltage duty.

• Enclosed interrupter switchgear
• 1 kV to 38 kV applications
• Medium-voltage power systems
• Design and rating reference
• Testing and compliance support