IEEE 957-1987

IEEE 957-1987 is a technical guide on cleaning insulators, written for power, energy, and related industrial applications where contamination can affect insulation performance. It focuses on practical cleaning considerations for insulator surfaces, helping users reduce the risk of tracking, flashover, and service interruptions. As a superseded standard, IEEE 957-1987 remains useful as a reference point for maintenance planning, inspection practices, and procurement decisions involving insulation care.

IEEE 957-1987 overview

This standard addresses the cleaning of insulators used in electrical power systems and similar industrial environments. IEEE 957-1987 is intended to guide engineers and maintenance personnel in selecting suitable cleaning approaches based on operating conditions, contamination levels, and equipment needs. Its technical context is centered on keeping insulator surfaces in a condition that supports reliable electrical performance. For organizations reviewing legacy maintenance methods, the document can help frame cleaning expectations and support consistent field practice.

Typical use cases

IEEE 957-1987 is commonly relevant where insulators are exposed to dust, salt, pollution, or other deposits that may reduce dielectric performance. It may be used in substation maintenance, overhead line upkeep, and industrial power installations that depend on clean insulating surfaces. The guide can also support work planning for outage maintenance, inspection routines, and cleaning method selection. In these settings, IEEE 957-1987 helps teams align maintenance activity with the operating environment and the condition of the equipment.

Why this standard matters

Cleaning practices can directly affect insulation reliability, so a clear reference helps reduce avoidable risk. IEEE 957-1987 supports more consistent decision-making when choosing how and when to clean insulators, especially in demanding power-system environments. It can improve maintenance consistency, assist with technical documentation, and provide a basis for comparing procedures during procurement or review. For organizations managing legacy assets, the standard offers a practical way to support performance, safety, and service continuity.

• Guide for insulator cleaning practices
• Relevant to contaminated power-system environments
• Supports maintenance and inspection planning
• Useful for legacy compliance reference