IEEE C37.47-2000

C37.47-2000 is a technical standard for limiting type distribution class fuses and fuse disconnecting switches used in power and energy applications. It addresses equipment intended to protect distribution circuits by interrupting fault current while supporting safe switching and isolation. For utilities, engineers, and procurement teams, the standard provides a clear reference for design and performance expectations, helping reduce ambiguity when specifying fuse equipment for distribution systems and related installations.

C37.47-2000 overview

This standard focuses on the requirements and characteristics of limiting type distribution class fuses and fuse disconnecting switches, which are used in electrical distribution environments where current limiting behavior can improve protection. C37.47-2000 is relevant when comparing device construction, ratings, and operating expectations for equipment that must function reliably under fault conditions. It helps define a common technical basis for selecting and evaluating these protective devices in power-system applications.

Typical use cases

The document is commonly used when specifying fuse equipment for distribution feeders, transformer protection, and other medium-voltage circuit applications that rely on current-limiting interruption. It may also support the selection of fuse disconnecting switches in utility and industrial power networks where both protection and isolation are needed. C37.47-2000 is useful during equipment procurement, substation or feeder design reviews, and coordination of protective devices in energy infrastructure.

Why this standard matters

Using C37.47-2000 helps align engineering decisions with a recognized technical framework for fuse-based protection equipment. That matters because consistent requirements can support safer switching, more predictable fault response, and better coordination across a distribution system. For buyers and specifiers, the standard can also reduce uncertainty when comparing products, reviewing compliance claims, and checking whether equipment is suited to the intended operating conditions and performance limits.

• Limiting type distribution class fuse requirements
• Fuse disconnecting switch application context
• Distribution system protection and isolation
• Current-limiting performance considerations
• Superseded English-language standard