PC57.19.100/D9, Jan 2025 is a technical standard that provides guidance for the application of power apparatus bushings in power, energy, and industrial equipment. It helps engineers and specifiers understand how bushings should be selected, applied, and integrated so they perform reliably under electrical and mechanical stresses. For projects involving transformers, switchgear, or similar apparatus, this document supports more consistent design decisions and can help reduce application-related risk.

About PC57.19.100/D9, Jan 2025

This standard focuses on the application of power apparatus bushings, which are critical insulating components used where conductors pass through grounded barriers or equipment enclosures. PC57.19.100/D9, Jan 2025 is relevant to the engineering decisions that affect insulation coordination, operating performance, and overall apparatus reliability. As a guidance document, it is commonly used to support proper specification and application practices rather than to define a single product design. Its inactive status may be relevant when reviewing legacy references or comparing older application methods.

Where is PC57.19.100/D9, Jan 2025 used?

PC57.19.100/D9, Jan 2025 is typically used in the planning and specification of electrical apparatus that rely on bushings for safe current transfer and insulation integrity. That includes power transformers, high-voltage equipment, and related energy-system installations where conductors must pass through tank walls, covers, or barriers. In industrial power environments, the guidance may also be useful during equipment selection, retrofit evaluation, and maintenance planning. It is especially relevant when bushing application must align with system voltage, insulation, and environmental conditions.

Importance in practice

In practice, the value of PC57.19.100/D9, Jan 2025 lies in helping teams apply bushings consistently and with fewer design uncertainties. Proper application affects safety, dielectric performance, service life, and the likelihood of unexpected failures. The document can support procurement reviews, engineering checks, and technical comparisons when choosing equipment for demanding power applications. For organizations working with legacy designs or replacement parts, it may also help maintain alignment between apparatus requirements and installed bushing performance.

• Guidance for power apparatus bushing application
• Relevant to insulation and conductor passage design
• Useful for transformer and related equipment specification
• Supports application review and technical comparison
• Inactive standard for legacy reference purposes