PC37.62/D3, Sept 2024 is a technical draft focused on mounted dry vault, submersible, and overhead fault interrupters for alternating current systems up to and including 38 kV. It addresses equipment used to interrupt fault current in medium-voltage networks, where reliable protection and controlled switching are essential. For utilities, engineers, and specifiers, this standard helps define the design and performance expectations that support safer operation, better coordination, and more consistent procurement.

About PC37.62/D3, Sept 2024

This document addresses the requirements and technical context for fault interrupters intended for AC systems rated through 38 kV, including mounted dry vault, submersible, and overhead applications. PC37.62/D3, Sept 2024 is relevant where interruption performance, insulation arrangement, and installation environment must be considered together. It is typically used to guide equipment design and evaluation so that interrupters can operate dependably under fault conditions while fitting the constraints of the intended mounting method and service location.

Where is PC37.62/D3, Sept 2024 used?

PC37.62/D3, Sept 2024 is most relevant in medium-voltage distribution systems that use fault interrupters to isolate temporary or permanent faults. It may apply to overhead lines, underground vault installations, and submersible equipment placed in environments where moisture, enclosure integrity, and accessibility matter. The standard is useful in utility feeder protection, network switching, and related engineering workflows where equipment selection must match voltage class, installation type, and service conditions.

Importance in practice

In practice, this technical document helps reduce uncertainty when specifying and evaluating fault interrupters for AC systems up to 38 kV. It supports compliance-driven design control, more consistent testing, and clearer procurement decisions across different installation types. By aligning expectations for construction and operating performance, PC37.62/D3, Sept 2024 can help lower the risk of misapplication, improve reliability in service, and support safer fault interruption in demanding field conditions.

• Mounted dry vault applications
• Submersible interrupter environments
• Overhead fault interruption use cases
• AC systems up to and including 38 kV
• Design, testing, and procurement reference