33.040.99 - Other equipment for telecommunication systems
Other equipment for telecommunication systems
Weitere Aspekte der Telefonie und Telegraphie
Autres equipements pour les systemes de telecommunication
Druga oprema za telekomunikacijske sisteme
General Information
This part of IEC 61643 covers the application of surge isolation transformers (SITs) that are
used in telecommunication transformer applications with signal levels up to 400 V peak to
peak. These transformers have a high rated impulse voltage with or without screen between
the input and output windings. SITs are components for surge protection and are used to
mitigate the onward propagation of common-mode voltage surges. This document describes
SITs' selection, application principles and re...view more
- Standard23 pagesEnglish language
sale 10% off- e-Library read for1 day
The present document specifies technical characteristics and methods of measurements for TV white space devices
(TVWSDs) controlled by a TV white space database (TVWSDB) and which operate in the TV broadcast band
470 MHz to 790 MHz.
The present document applies to the following radio equipment types:
1) Master TV white space device (TVWSD)
2) Slave TV white space device (TVWSD)
The present document applies to TVWSDs with integral, dedicated or external antennas, where TVWSDs using external...view more
- Standard77 pagesEnglish language
sale 10% off- e-Library read for1 day
- Standard77 pagesEnglish language
sale 15% off- Standard77 pagesEnglish language
sale 15% off- Standard77 pagesEnglish language
sale 15% off
IEC 61643-352:2018 covers the application of surge isolation transformers (SITs) that are used in telecommunication transformer applications with signal levels up to 400 V peak to peak. These transformers have a high rated impulse voltage with or without screen between the input and output windings. SITs are components for surge protection and are used to mitigate the onward propagation of common-mode voltage surges. This document describes SITs' selection, application principles and related inf...view more
- Standard43 pagesEnglish and French language
sale 15% off
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 o...view more
- Standard29 pagesEnglish language
sale 10% off- e-Library read for1 day
IEC 61643-351:2016 defines test circuits and test methods for determining and verifying the SIT surge parameters. Preferred performance values for key parameters are given. 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 applicabl...view more
- Standard29 pagesEnglish language
sale 10% off- e-Library read for1 day
IEC 61643-351:2016 defines test circuits and test methods for determining and verifying the SIT surge parameters. Preferred performance values for key parameters are given. 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 applicabl...view more
- Standard54 pagesEnglish and French language
sale 15% off
The present document applies to TV white space devices (TVWSDs) controlled by a TV white space database (TVWSDB) and which operate in the TV broadcast band 470 MHz to 790 MHz. The present document applies to the following radio equipment types:
1) Master TV white space device (TVWSD)
2) Slave TV white space device (TVWSD)
The present document applies to TVWSDs with integral, dedicated or external antennas, where TVWSDs using external antennas are intended only for fixed use. The present docum...view more
- Standard72 pagesEnglish language
sale 10% off- e-Library read for1 day
- Standard72 pagesEnglish language
sale 15% off- Standard72 pagesEnglish language
sale 15% off- Standard71 pagesEnglish language
sale 15% off
IEC 61643-311:2013 is applicable to gas discharge tubes (GDT) used for overvoltage protection in telecommunications, signalling and low-voltage power distribution networks with nominal system voltages up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c..They are defined as a gap, or several gaps with two or three metal electrodes hermetically sealed so that gas mixture and pressure are under control. They are designed to protect apparatus or personnel, or both, from high transient voltages. This standar...view more
- Standard30 pagesEnglish language
sale 10% off- e-Library read for1 day
IEC 61643-312:2013 is applicable to gas discharge tubes (GDT) used for overvoltage protection in telecommunications, signalling and low-voltage power distribution networks with nominal system voltages up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c. They are defined as a gap, or several gaps with two or three metal electrodes hermetically sealed so that gas mixture and pressure are under control. They are designed to protect apparatus or personnel, or both, from high transient voltages. This standar...view more
- Standard24 pagesEnglish language
sale 10% off- e-Library read for1 day
IEC 61643-312:2013 is applicable to gas discharge tubes (GDT) used for overvoltage protection in telecommunications, signalling and low-voltage power distribution networks with nominal system voltages up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c. They are defined as a gap, or several gaps with two or three metal electrodes hermetically sealed so that gas mixture and pressure are under control. They are designed to protect apparatus or personnel, or both, from high transient voltages. This standar...view more
- Standard43 pagesEnglish and French language
sale 15% off
IEC 61643-311:2013 is applicable to gas discharge tubes (GDT) used for overvoltage protection in telecommunications, signalling and low-voltage power distribution networks with nominal system voltages up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c..They are defined as a gap, or several gaps with two or three metal electrodes hermetically sealed so that gas mixture and pressure are under control. They are designed to protect apparatus or personnel, or both, from high transient voltages. This standar...view more
- Standard53 pagesEnglish and French language
sale 15% off
This European Standard specifies the environmental conditions encountered within Europe. It can also be applied elsewhere by agreement between the supplier and the customer. The scope of this European Standard covers the design and the use of equipment and any portable equipment for signalling and telecommunications systems (including test, measure, monitoring equipment, etc.). The portable equipment must comply with the sections of this European Standard relevant to their use. This European Sta...view more
- Standard28 pagesEnglish language
sale 10% off- e-Library read for1 day