PC37.11/D6.6, Apr 2013 is a technical standard focused on voltage circuit breakers above 1000V, with emphasis on the engineering requirements and performance considerations that support dependable power-system operation. In the context of power, energy and industry applications, it helps define how high-voltage breakers should be designed, evaluated, and applied. For procurement, testing, and compliance work, this standard provides a clear reference for comparing equipment and managing risk in medium- and high-voltage switching systems.

PC37.11/D6.6, Apr 2013 overview

This document addresses the technical expectations for circuit breakers used in voltage applications above 1000V, where interruption performance, insulation behavior, and system coordination are critical. PC37.11/D6.6, Apr 2013 is relevant to engineers who need a consistent basis for specifying breaker characteristics and assessing suitability in electrical distribution and industrial power environments. By focusing on the breaker’s functional and operating requirements, it supports more consistent design decisions and helps align equipment selection with service conditions and operational limits.

Typical use cases

PC37.11/D6.6, Apr 2013 is typically used when selecting or reviewing high-voltage circuit breakers for substations, switchgear assemblies, industrial feeders, and other power-distribution installations above 1000V. It may also be referenced during specification writing, factory acceptance checks, and maintenance planning for equipment that must interrupt fault current reliably. In practice, it supports teams working on utility networks, plant electrical systems, and engineered power infrastructure where breaker performance has a direct impact on continuity and safety.

Why this standard matters

This standard matters because voltage circuit breakers above 1000V operate in demanding conditions where even small inconsistencies can affect protection, uptime, and personnel safety. PC37.11/D6.6, Apr 2013 helps create a common technical baseline for design review, compliance assessment, and procurement comparison. It can reduce ambiguity when evaluating ratings, insulation-related expectations, and operational performance, making it easier to specify equipment with greater confidence and lower risk across power and industrial applications.

• Voltage circuit breakers above 1000V
• Power-system protection and switching
• Insulation and interruption performance
• Specification and compliance reference
• Utility and industrial electrical applications