IEEE PC57.142 is a draft technical guide for describing the occurrence and mitigation of switching transients caused by transformer, switching device, and system interaction. It is aimed at power and energy applications where transient behavior can affect insulation stress, equipment performance, and operating reliability. By focusing on the sources and effects of these events, the standard helps engineers evaluate conditions that may lead to unwanted overvoltages or switching-related disturbances in electrical systems.

IEEE PC57.142 overview

This draft guide addresses the technical context of switching transients in power systems, with attention to how transformers, switching devices, and connected system elements interact during energization, de-energization, and other switching operations. IEEE PC57.142 is relevant where transient phenomena must be described in a consistent engineering framework for analysis, design review, or documentation. Its focus is practical: identifying the occurrence of transients and outlining mitigation approaches that may reduce electrical stress and improve system behavior.

Typical use cases

IEEE PC57.142 is typically used when evaluating switching events in transformer-based installations, substation equipment, or other power-system assets where transient response matters. It may support studies of breaker operation, transformer energization, and system interactions that produce switching surges or oscillatory effects. The guide is also useful in planning mitigation measures such as controlled switching, surge protection coordination, and design choices intended to limit transient impact on connected apparatus and system insulation.

Why this standard matters

This standard matters because switching transients can influence equipment life, service continuity, and the consistency of power-system performance. IEEE PC57.142 supports clearer communication between design, testing, and operations teams by providing a common technical reference for describing the problem and possible mitigation methods. For procurement, engineering review, and compliance-oriented work, that consistency can help reduce ambiguity around expected behavior, acceptable risk, and the measures needed to protect transformers and related switching equipment.

• Switching transient description
• Transformer and device interaction
• Mitigation and control methods
• Power-system application focus
• Transient impact on insulation and performance