PC37.13.1/D4, Oct 2015 is a technical standard for voltage power circuit breaker switchgear rated at 600 Vac and below, with a clear focus on power, energy, and industrial applications. It provides guidance relevant to the design, evaluation, and use of low-voltage switchgear assemblies where circuit breakers play a central protective and switching role. For engineers, specifiers, and buyers, this document helps define a more consistent basis for selection and compliance.

PC37.13.1/D4, Oct 2015 overview

This standard addresses the technical context of voltage (600 Vac and below) power circuit breaker switchgear, which is commonly used to control, protect, and isolate electrical distribution equipment. PC37.13.1/D4, Oct 2015 is most relevant where switchgear performance, ratings, and construction need to be defined with care for dependable operation. In practice, it supports clearer alignment between equipment design and the expectations placed on low-voltage power systems.

Typical use cases

This standard is typically applied when specifying or reviewing low-voltage switchgear that incorporates power circuit breakers for feeder protection, distribution control, or equipment isolation. It may be useful in industrial facilities, utility-related installations, and larger commercial power systems where dependable switching and fault protection are important. PC37.13.1/D4, Oct 2015 can also inform procurement and engineering review for assemblies intended to serve critical electrical loads.

Why this standard matters

PC37.13.1/D4, Oct 2015 matters because switchgear must perform consistently under electrical stress while supporting safe operation and maintainable system design. A clear technical standard helps reduce ambiguity in ratings, construction expectations, and testing-related decisions for voltage switchgear using circuit breakers. That consistency can improve procurement accuracy, support compliance efforts, and reduce risk during installation, operation, and maintenance of low-voltage power systems.

• Voltage switchgear rated 600 Vac and below
• Power circuit breaker application context
• Low-voltage distribution and protection
• Design, rating, and compliance reference
• Industrial and power-system equipment focus