IEEE C37.17-1997

C37.17-1997 is an American National Standard for trip devices for AC and general purpose DC low voltage power circuit breakers, providing guidance for an essential protective component in power, energy, and industry applications. It helps define how these devices should function so breakers can respond consistently to abnormal current conditions. As a superseded standard, C37.17-1997 remains useful for understanding legacy equipment requirements, technical comparisons, and compliance records tied to older breaker designs.

About C37.17-1997

This standard focuses on the trip devices used with low voltage power circuit breakers, where dependable operation is critical to circuit protection and coordinated shutdown. C37.17-1997 addresses the technical expectations for trip functions in AC systems and general purpose DC applications, helping establish a clear basis for design, evaluation, and documentation. For engineers, purchasers, and maintenance teams, it supports consistent interpretation of requirements for breaker trip performance in established electrical equipment.

Where is C37.17-1997 used?

C37.17-1997 is typically relevant wherever low voltage power circuit breakers are used to protect electrical distribution equipment, control assemblies, and industrial power systems. Its scope fits installations that rely on trip devices for fault interruption and operational protection, including legacy panels, switchgear, and related low voltage assemblies. Because it covers both AC and general purpose DC service, it is especially useful in facilities where breaker selection, testing, or replacement must align with older technical requirements.

Importance in practice

In practice, this standard matters because trip devices directly affect protection, coordination, and reliability in low voltage breaker applications. Using a defined reference such as C37.17-1997 can support procurement decisions, maintenance planning, and technical review of older equipment. It also helps reduce ambiguity when assessing breaker performance, replacement compatibility, or documentation for installed systems. For organizations managing legacy power equipment, it provides a practical benchmark for consistency and risk control.

• Trip device requirements for low voltage circuit breakers
• AC and general purpose DC application context
• Legacy breaker design and evaluation reference
• Protection, coordination, and fault response focus
• Useful for procurement and compliance review