British Standards Institution

Source:: IEC
Committee:: PEL/37 - Surge Arresters
Categories:: Resistors. Variable and potentiometers.
Number of comments:: 0

Scope

This part of 61643 applies to surge isolation transformers (SITs) dedicated to surge mitigation and for connection to 50/60 Hz power circuits and equipment rated up to 1 000V rms. This standard covers the surge and mitigation performance of SITs with an impulse withstand voltage performance at least 30 kV, and provides standard methods for testing and rating.

This document covers surge-related parameters but does not address typical transformer tests and parameters covered by the IEC 60076 series, IEC 60989 series, and IEC 61558 series standards. This document also does not cover SIT operation under differential mode lightning surge conditions.

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Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

04/04/2025

3. Public Comments

Public Comments start date:

13/11/2024

Public Comments end date:

04/12/2024

Learn more about the standards development process

Standards Development

BS EN IEC 61643-361 ED1 BS EN 61643-361 ED1 Low-voltage surge protective components. Part 361: Surge isolation transformers (SITs) connected to low-voltage distribution system – Requirements and test methods

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