IEEE C37.35-1976

C37.35-1976 is a technical standard for voltage air disconnecting and load interrupter switches, helping define how these devices are addressed in power systems. It is relevant to engineering teams working with switching equipment where dependable isolation, load interruption, and consistent performance are important. By focusing on switch function and application context, C37.35-1976 supports clearer specification, evaluation, and procurement decisions for electrical apparatus used in power, energy, and related industrial installations.

Overview of C37.35-1976

This standard addresses the technical framework for voltage air disconnecting and load interrupter switches, which are used to isolate circuits or interrupt load current in electrical distribution environments. C37.35-1976 is intended to guide understanding of equipment behavior, design expectations, and applicable performance considerations for these switch types. In practical terms, it helps align manufacturers, specifiers, and users around a common basis for comparing equipment and checking that switching devices suit the intended service conditions.

Typical use cases

C37.35-1976 is commonly relevant where air disconnecting switches or load interrupter switches are selected for medium-voltage or similar power applications. Typical uses may include substation switching, feeder isolation, maintenance disconnecting, and controlled interruption of energized circuits in utility or industrial power systems. It can also support equipment selection for switchgear lineups, distribution facilities, and other installations where safe switching, isolation, and operational consistency are important to the overall system workflow.

Why it matters

For organizations that specify or evaluate switching equipment, C37.35-1976 helps bring consistency to design and procurement decisions. Clear technical expectations can reduce mismatch between the required duty and the chosen switch, improving safety and limiting operational risk. It also supports more reliable testing and comparison of products, which is valuable when coordinating compliance, maintenance planning, and long-term asset management. For power and energy applications, that consistency can make day-to-day switching practices more predictable.

• Voltage air disconnecting switch requirements
• Load interrupter switching context
• Power-system isolation and interruption
• Specification and comparison reference
• Superseded technical edition