Guide for Tank Rupture Mitigation of Liquid-Immersed Power Transformers and Reactors

Designation Number:
IEEE C57.156
Standard Type:
National Standard of Canada - Domestic
Standard Sub-Type
Joint Canada-U.S. National Standard
Standard Development Activity:
New Standard
ICS code(s):
29.180
Status:
Open for SDO comment
SDO Comment Period Start Date:
SDO Comment Period End Date:
Posted On:

Scope:

This guide describes measures that can help mitigate rupture and uncontrolled insulating liquid release from energized liquid-immersed power transformers’ and reactors’ tanks and components due to internal electrical faults.

Project need:

The stakeholders for this project include transformer users and manufacturers, academic institutions. We would like input and participation from Canada.  

There is a need to describe the present state of knowledge of tank rupture prevention. There have been occurrences where in service electrical failures within the active part of liquid-immersed power transformers and reactors have resulted in tank rupture which has resulted in fluid loss, the loss of transformers and adjacent equipment through fire damage and in some cases environmental damage beyond the site perimeter. The guide will include descriptions of the relationship between voltage class, arc duration during internal faults, arc energy, hydraulic pressures and the modes of tank rupture.

As mentioned, Canadian Utilities and transformer manufacturer have been using C57.156 to address the safer and reliable power transformers.

Note: The information provided above was obtained by the Standards Council of Canada (SCC) and is provided as part of a centralized, transparent notification system for new standards development. The system allows SCC-accredited Standards Development Organizations (SDOs), and members of the public, to be informed of new work in Canadian standards development, and allows SCC-accredited SDOs to identify and resolve potential duplication of standards and effort.

Individual SDOs are responsible for the content and accuracy of the information presented here. The text is presented in the language in which it was provided to SCC.