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ČSN EN 61643-351 (341392)
Components for low-voltage surge protective devices - Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT)
Translate name
STANDARD published on 1.8.2017
The information about the standard:
Designation standards: ČSN EN 61643-351
Classification mark: 341392
Catalog number: 502495
Publication date standards: 1.8.2017
SKU: NS-689126
The number of pages: 36
Approximate weight : 108 g (0.24 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
The category - similar standards:
Other equipment for telephone and telegraph communications telecommunication systems
Annotation of standard text ČSN EN 61643-351 (341392):
Surge isolation transformers (SITs) are used for signal transformer applications with signal levels up to 400 V peak to peak. SITs are transformers, with or without an internal-winding screen, with a rated impulse withstand voltage greater than the peak voltage of the expected common-mode surge environment. SITs are applicable to components for surge protection against indirect and direct effects of lightning or other transient overvoltage. SITs are used to mitigate the onward propagation of common-mode voltage surges. This part of IEC 61643 defines test circuits and test methods for determining and verifying the SIT surge parameters. Preferred performance values for key parameters are given.
This part of IEC 61643 does not cover SIT operation under differential-mode lightning surge conditions
