|
US$494.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 18802.351-2019: Components for low-voltage surge protective devices -- Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT)
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 18802.351-2019 | English | 494 |
Add to Cart
|
5 days [Need to translate]
|
Components for low-voltage surge protective devices -- Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT)
| Valid |
GB/T 18802.351-2019
|
PDF similar to GB/T 18802.351-2019
Basic data | Standard ID | GB/T 18802.351-2019 (GB/T18802.351-2019) | | Description (Translated English) | Components for low-voltage surge protective devices -- Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT) | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K30 | | Classification of International Standard | 29.240.10 | | Word Count Estimation | 26,252 | | Date of Issue | 2019-12-10 | | Date of Implementation | 2020-07-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 18802.351-2019: Components for low-voltage surge protective devices -- Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT)
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Low-voltage surge protector components.Part 351. Performance requirements and test methods for surge isolation transformers (SIT) for telecommunication and signal networks)
ICS 29.240.10
K30
National Standards of People's Republic of China
Low-voltage surge protector elements. Part 351.
Surge isolation for telecommunications and signal networks
Transformer (SIT) performance requirements and test methods
Componentsforlow-voltagesurgeprotectivedevices-Part 351.
signalingnetworksurgeisolationtransformers (SIT)
(IEC 61643-351..2016, IDT)
2019-12-10 release
2020-07-01 implementation
State Administration of Market Supervision
Published by the National Standardization Management Committee
Contents
Foreword III
Introduction Ⅴ
1 Scope 1
2 Normative references 1
3 Terms and definitions, symbols and acronyms 1
3.1 Terms and definitions 1
3.2 Symbol 3
3.3 Acronyms 5
4 Conditions of use 5
4.1 Temperature range 5
4.2 Relative humidity 5
4.3 Altitude 5
4.4 Microclimate 5
5 SIT surge environment 6
5.1 SIT Surge Suppression 6
5.2 Common Mode Surge 7
5.3 Differential mode surge 7
6 Features 7
6.1 Characteristic measurement 7
6.2 Capacitance between input winding and output winding 8
6.3 Insulation resistance (IR) 9
6.4 Signal SIT voltage-time product 11
7 Rating 12
7.1 Rated impulse withstand voltage 12
7.2 Signal SIT winding rated DC current 15
8 Identification 16
8.1 Overview 16
8.2 Parameter Table 16
8.3 Logo 16
Appendix A (informative) 1.2/50 Shock 17
References 18
Figure 1 Double winding SIT symbol 4
Figure 2 Double winding SIT symbol with polarity indication 4
Figure 3 Double winding SIT symbol with electrical shield 4
Figure 4 SIT symbol with middle tap in winding 5
Figure 5 SIT common mode surge environment 6
Figure 6 SIT common mode surge environment with electrical shield 7
Figure 7 Test circuit for measuring internal winding capacitance of SIT 8
Fig. 8 Test circuit for measuring internal winding capacitance of SIT with electrical shield 9
Figure 9 Test circuit for measuring SIT insulation resistance 10
Figure 10 Test circuit for measuring SIT insulation resistance with an electrical shield
Figure 11 Test circuit for measuring the SIT voltage-time product 11
Figure 12 Generator and SIT secondary voltage waveform 11
Figure 13 Test circuit for SIT rated impulse withstand voltage 12
Figure 14 Test circuit for SIT rated impulse withstand voltage with electrical shield 13
Figure 15 Pass/fail model created by 1.2/50 open circuit waveform 13
Figure 16 Pass/fail model and test waveform 14
Figure 17 Test circuit for winding conductor temperature rise 16
Figure A.1 1.2/50 time parameter and voltage amplitude 17
Table 1 Classification of microclimate environment 5
Table 2 Shock withstand test voltage corresponding to the rated shock withstand voltage 14
Table A.1 1.2/50 Impulse Voltage Generator Parameters 17
Foreword
GB/T 18802 consists of the following parts.
--- GB/T 18802.1 Low-voltage surge protector (SPD) Part 1. Performance requirements of surge protectors for low-voltage power distribution systems
And test methods;
--- GB/T 18802.12 Low voltage surge protector (SPD) Part 12. Surge protector selection and
Use guidelines;
--- GB/T 18802.21 Low-voltage surge protector Part 21. Performance requirements of surge protectors (SPD) for telecommunications and signal networks
Summation test method;
--- GB/T 18802.22 Low-voltage surge protector Part 22. Selection and use of surge protectors for telecommunications and signal networks
Guidelines;
--- GB/T 18802.31 Surge protectors for special applications (including DC) for low-voltage surge protectors. Part 31. For photovoltaics
System surge protector (SPD) performance requirements and test methods;
--- GB/T 18802.311 Low-voltage surge protector components-Part 311. Performance requirements and measurement of gas discharge tubes (GDT)
Test loop
--- GB/T 18802.312 Low-voltage surge protector components Part 312. Selection and use of gas discharge tubes (GDT)
Guidelines;
--- GB/T 18802.321 Low-voltage surge protector components-Part 321. Avalanche breakdown diode (ABD) specification;
--- GB/T 18802.331 Low-voltage surge protector element Part 331. Specification for metal oxide varistor (MOV);
--- GB/T 18802.341 Low-voltage surge protector components-Part 341. Surge suppression thyristor (TSS) specification;
--- GB/T 18802.351 Low-voltage surge protector elements-Part 351. Surge isolation transformers for telecommunications and signal networks
(SIT) performance requirements and test methods.
This part is Part 351 of GB/T 18802.
This section is drafted in accordance with the rules given in GB/T 1.1-2009.
This section uses the translation method equivalent to IEC 61643-351..2016 "Low-voltage surge protector components-Part 351. Telecommunications and signals
Performance Requirements and Test Methods for Surge Isolation Transformers (SIT) in Networks.
The Chinese documents that have a consistent correspondence with the international documents referenced normatively in this section are as follows.
--- GB/T 4728.6-2008 Graphical symbols for electrical diagrams Part 6. Generation and conversion of electrical energy (IEC 60617data-
base..2007, IDT);
--- GB/T 4798.3-2007 Environmental conditions for the application of electric and electronic products Part 3. Fixed use in weather-protected places
(IEC 60721-3-3..2002, MOD).
The following editorial changes have been made in this section.
--- Added a note in 7.1a), supplemented the number and interval of application of the withstand test voltage;
--- Deleted Note 2 in Table 2 that has nothing to do with China.
Please note that some elements of this document may involve patents. The issuer of this document is not responsible for identifying these patents.
This section is proposed by China Electrical Equipment Industry Association.
This part is under the jurisdiction of the National Lightning Arrester Standardization Technical Committee (SAC/TC81).
This section was drafted. Sichuan Zhongguang Lightning Protection Technology Co., Ltd., Xi'an High Voltage Apparatus Research Institute Co., Ltd., Shanghai University,
Guangzhou Zhongguang Electric Technology Co., Ltd., Shanghai Leixun Lightning Protection Technology Co., Ltd., Phoenix Asia Pacific Electric (Nanjing) Co., Ltd., Shenzhen
Tiechuang Technology Development Co., Ltd., Xi'an Shendian Electric Co., Ltd., Shanghai Youtai Oushen Electromechanical Co., Ltd., Rhein Technology (Shanghai) Co., Ltd.
the company.
The main drafters of this section. Lei Chengyong, Xie Jin, Huang Yong, Zhou Qibin, Guo Yaping, Pan Ting, Xu Zhuqin, He Hengwen, Jia Dongxu, Wang Jiongqi,
Shi Bing.
Introduction
This part of GB/T 18802 applies to surge isolation transformers whose rated impulse withstand voltage is compatible with the expected surge environment at the installation.
Device. This surge protection component (SPC) can be matched with a current bleeder component (such as GDT, MOV, etc.) or a surge protector (SPD).
Isolation and attenuation of transient voltages can also be used in SPDs.
Low-voltage surge protector elements. Part 351.
Surge isolation for telecommunications and signal networks
Transformer (SIT) performance requirements and test methods
1 Scope
This part of GB/T 18802 details the test circuit and test method used to determine and verify the SIT surge parameters, and gives
Optimized parameters for key performance. The surge isolation transformer (SIT) is used as a signal transformer with a peak-to-peak signal voltage not exceeding 400V.
SIT is a transformer with or without internal windings whose rated impulse withstand voltage is greater than the peak voltage of the expected common-mode surge environment.
SIT is a component suitable for protection against indirect and direct effects of lightning or other transient overvoltage surges. SIT is used to suppress co-
The mode voltage surge propagates forward.
This section does not include SITs operating in a differential mode lightning surge environment.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 16935.1-2008 Insulation coordination for equipment in low-voltage systems Part 1. Principles, requirements and tests (IEC 60664-1.
(2007, IDT)
GB /Z 16935.2-2013 Insulation coordination for equipment in low-voltage systems Part 2-1. Application guide GB/T 16935 series should
Explanation, sizing example and dielectric test (IEC /T R60664-2-1..2011, IDT)
IEC 60617 datebase Graphical Symbols (Graphicalsymbolsfordiagrams)
IEC 60721-3-3 Classification of environmental conditions. Part 3. Classification of environmental parameter groups and their severity. Section 3.
Protective place fixed use (Classificationofenvironmentalconditions-Part 3. Classificationofgroupsofenvi-
ronmentalparametersandtheirseverities-Section3. Stationaryuseatweatherprotectedlocations)
3 Terms and definitions, symbols and acronyms
3.1 Terms and definitions
The following terms and definitions apply to this document.
3.1.1
Surge isolation transformer; SIT
Isolation transformer with high impulse withstand voltage, with or without electrical shield between input and output windings.
3.1.2
Electric shield
A shield made of a conductive material to reduce the penetration of an electric field into a given area.
[GB/T 2900.83-2008, definition 151-13-10]
3.1.3
Breakdown
When the discharge is completely across the insulation, the insulation fails under electrical stress, causing the voltage between the electrodes to drop to near zero.
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 18802.351-2019_English be delivered?Answer: Upon your order, we will start to translate GB/T 18802.351-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 18802.351-2019_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 18802.351-2019_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.
|