IEEE C37.22-1959

C37.22-1959 is a technical standard for ASA automatic circuit reclosers and automatic line sectionalizers used in alternating current systems. It addresses the equipment behavior and application context needed to support dependable power distribution in utility and industrial networks. For engineers, buyers, and specifiers, this document helps define expectations for protection, sectionalizing, and coordination in AC circuits where controlled interruption and restoration can improve service continuity and operating consistency.

Overview of C37.22-1959

This standard focuses on automatic switching devices used in power distribution systems, especially reclosers and line sectionalizers that respond to current conditions in alternating current networks. C37.22-1959 is relevant when specifying equipment that must interrupt faults, isolate sections of line, and restore service after temporary disturbances. It is most useful where design, rating, and performance considerations must align with practical operating conditions in electrical distribution and related components, circuits, devices, and systems.

Typical use cases

C37.22-1959 may be used when selecting or reviewing automatic circuit reclosers for overhead distribution feeders, or line sectionalizers in utility protection schemes. It is also relevant for coordination studies, procurement specifications, and equipment comparisons involving AC systems that need automatic fault response. In practice, the standard supports applications where sectionalizing can limit outage scope, improve restoration procedures, and help integrate protection devices into broader distribution control arrangements.

Why it matters

For organizations working with AC distribution equipment, C37.22-1959 helps establish a common reference for expected device behavior and application boundaries. That matters for compliance review, consistent purchasing, and engineering control, especially when multiple devices must operate together during faults and recovery. Using a defined standard can reduce ambiguity in specifications, support safer system design, and make testing or acceptance checks more straightforward for reclosers and sectionalizers.

• Automatic circuit reclosers
• Automatic line sectionalizers
• Alternating current distribution systems
• Protection coordination and fault isolation
• Equipment specification and acceptance