|
US$874.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 18802.31-2021: Low-voltage surge protective devices - Part 31: Surge protective devices connected to photovoltaic installations - Requirements and test methods
Status: Valid GB/T 18802.31: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 18802.31-2021 | English | 874 |
Add to Cart
|
5 days [Need to translate]
|
Low-voltage surge protective devices - Part 31: Surge protective devices connected to photovoltaic installations - Requirements and test methods
| Valid |
GB/T 18802.31-2021
|
| GB/T 18802.31-2016 | English | 360 |
Add to Cart
|
0--9 seconds. Auto-delivery
|
Low-voltage surge protective devices -- Surge protective devices for specific application including d.c. -- Part 31: Requirements and tests for SPDs in photovoltaic applications
| Obsolete |
GB/T 18802.31-2016
|
PDF similar to GB/T 18802.31-2021
Basic data | Standard ID | GB/T 18802.31-2021 (GB/T18802.31-2021) | | Description (Translated English) | Low-voltage surge protective devices - Part 31: Surge protective devices connected to photovoltaic installations - Requirements and test methods | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K30 | | Word Count Estimation | 46,421 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 18802.31-2021: Low-voltage surge protective devices - Part 31: Surge protective devices connected to photovoltaic installations - Requirements and test methods
---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 protective devices - Part 31.Surge protective devices connected to photovoltaic installations - Requirements and test methods
ICS 29.240.10
K30
National Standards of People's Republic of China
Replace GB/T 18802.31-2016
Low Voltage Surge Protector Part 31.Used in Photovoltaics
System performance requirements and test methods for surge protectors
(IEC 61643-31.2018,Low-voltagesurgeprotectivedevices-
instalations,IDT)
Released on 2021-03-09 Implemented on 2021-10-01
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
Introduction Ⅵ
1 Scope 1
2 Normative references 1
3 Terms and definitions, symbols and abbreviations 2
3.1 Terms and definitions 2
3.2 Symbols and abbreviations 7
4 Conditions of use 8
4.1 Voltage 8
4.2 Atmospheric pressure and altitude 8
4.3 Temperature 9
4.4 Humidity 9
5 Classification 9
5.1 Overview 9
5.2 SPD design type 9
5.3 Type I, II and III tests of SPD 9
5.4 Location of use 9
5.5 Accessibility 9
5.6 SPD disconnector (including overcurrent protection) 10
5.7 Enclosure protection class according to the IP code of IEC 60529 10
5.8 Temperature and humidity range 10
5.9 Multipole SPD 10
5.10 Failure modes of SPD 10
5.11 Photovoltaic grounding system 10
6 Technical requirements 10
6.1 General requirements 10
6.2 Electrical performance requirements 12
6.3 Mechanical performance requirements 14
6.4 Environmental and material requirements 14
6.5 Additional requirements for special SPD design 15
6.6 Additional parameters that may be declared by the manufacturer---Maximum discharge current Imax 16
7 Type test 16
7.1 General 16
7.2 General test procedures 16
7.3 Durability of the logo 21
7.4 Electrical test 21
7.5 Mechanical test 29
7.6 Environmental and material tests 31
7.7 Additional tests for special SPD designs 31
8 Routine test and acceptance test 32
8.1 Routine test 32
8.2 Acceptance test 32
Appendix A (Normative Appendix) Test to determine whether there are switching elements and the size of freewheeling 33
Appendix B (informative appendix) Transient characteristics of PV test power supply 34
Reference 37
Figure 1 I/V characteristics 20
Figure 2 Flow chart of operating load test 22
Figure 3 Test setup for operating load test 23
Figure 4 Action load test sequence diagram for Type Ⅰ and Type Ⅱ tests 23
Figure 5 Sequence diagram of additional load test for Type I test 24
Figure 6 Action load test sequence diagram of Type Ⅲ test 24
Fig. 7 Sample preparation for SPD failure mode characteristic test 26
Figure B.1 Test setup for determining the transient characteristics of the PV test power supply using adjustable semiconductor switches 34
Figure B.2 The voltage and current characteristic curve of the semiconductor switch in the turn-off process under the PV power supply of ISC=4A, Uoc=640V 34
Figure B.3 Turn-off characteristic curve of semiconductor switch with junction i(t)/u(t) (normalized) 35
Figure B.4 The i/u characteristics of the PV test power supply calculated from the normalized current and voltage records in Figure B.3 35
Figure B.5 Use the fuse (PV type) to determine the test setup of the PV test power supply characteristics 36
Figure B.6 The normalized breaking of a PV power supply with a junction point i(t)/u(t) with a rated current of 0.1×ISCPV when the fuse operates
Features 36
Figure B.7 The i/u characteristics of the PV test power supply calculated from the normalized current and voltage records in Figure B.6 36
Table 1 List of abbreviations and symbols 8
Table 2 Use of terminals and connection methods 14
Table 3 Environmental and material requirements 15
Table 4 SPD type test requirements 17
Table 5 General qualification criteria for type test 18
Table 6 Special power supply characteristics for operating load test 20
Table 7 Special power supply characteristics for failure mode test 21
Table 8 Dielectric strength 28
Table 9 SPD clearance 29
Table 10 Creepage distance of SPD 30
Table 11 The relationship between material group and classification 31
Table 12 Test conductor for rated load current 32
Low Voltage Surge Protector Part 31.Used in Photovoltaics
System performance requirements and test methods for surge protectors
1 Scope
This part of GB/T 18802 is applicable to surges that protect against indirect and direct effects of lightning or other transient overvoltage surges
Protector (SPD). These SPDs will be connected to the DC side of a photovoltaic system whose rated voltage does not exceed 1500V.
These SPDs contain at least one non-linear element used to limit voltage and discharge surge current. This section specifies the
Performance characteristics, safety requirements, standard test methods and ratings.
SPDs that comply with this section are only designed to be installed on the DC side of the photovoltaic system and the DC side of the inverter.
SPD used for energy storage photovoltaic systems (such as batteries, capacitor banks) is not included in this section.
SPD with special series impedance between separate input and output terminals (the so-called two-port in IEC 61643-11.2011
SPD) is currently not included in this section.
The SPD conforming to this part is a permanently connected fixed SPD that can only be connected and disconnected with tools. This section does not apply to mobile
式SPD.
Note 1.For SPDs used in photovoltaic systems, for power efficiency considerations, a special series impedance is usually not included between the input and output terminals.
Note 2.The power system or grid mentioned in this section refers to the DC side of the photovoltaic system.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 2423.3-2016 Environmental Test Part 2.Test Method Test Cab. Constant Humidity Test (IEC 60068-2-78.
2012, IDT)
GB/T 16935.1-2008 Insulation coordination of equipment in low-voltage systems Part 1.Principles, requirements and tests (IEC 60664-1.
2007, IDT)
IEC 60060-1.2010 High-voltage test technology Part 1.General definitions and test requirements (High-voltagetesttech-
niques-Part 1.Generaldefinitionsandtestrequirements)
IEC 60529 Enclosure protection level (IP code) [Degrees of protection provided by enclosures (IP Code)]
IEC 61000-6-3 Electromagnetic Compatibility Part 6-3.General Standard Emission Standard in Residential, Commercial and Light Industrial Environments (Elec-
tromagneticcompatibility(EMC)Part 6-3.GenericstandardsEmissionstandardforresidential,com-
mercialandlight-industrialenvironments)
IEC 61180-1 High-voltage test technology for low-voltage equipment Part 1.Definition, test and procedure requirements (High-voltagetest
techniquesforlow-voltageequipment;part1.definitions,testandprocedurerequirements)
IEC 61643-11.2011 Low Voltage Surge Protector Part 11.Performance Requirements and Test of Surge Protector for Low Voltage Power System
Test method (Low-voltagesurgeprotectivedevices-Part 11.Surgeprotectivedevicesconnectedtolow-
voltagepowersystems-Requirementsandtestsmethods)
IEC 62475.2010 High-current test technology Test current and measurement system definition and requirements (High-currenttesttech-
niques-Definitionsandrequirementsfortestcurrentsandmeasuringsystems)
3) The letters "PV" should be included in the SPD type and discharge parameters of each protection mode declared by the manufacturer, and be close to each other
Print these parameters.
● Type I test. "Type I test" and "Iimp" and the value in kA, and/or
"T1" and "Iimp" and the value in kA; (for example. PV T1Iimp. 10kA)
● Type Ⅱ test. "Type Ⅱ test" and "In" and the value in kA, and/or
"T2" and "In" and the value in kA; (for example. PV T2In. 10kA)
● Type Ⅲ test. "Type Ⅲ test" and "UOC" and the value in kV, and/or
"T3" and "UOC" and the value in kV; (for example. PV T3UOC. 6kV)
4) Voltage protection level value Up ?PE, -?PE and Ù -, if applicable (each protection mode has a voltage value, if each
The voltage value of the protection mode is the same, only one value is required);
5) Shell protection level (when IP >20);
6) Marking of the terminal or wire (if there is no other mark on the SPD);
7) The rated load current IL of a port SPD with separate input and output.
If all the above signs cannot be marked due to space constraints, at least 1) and 6) (if the port is not exchangeable) should be marked on the SPD, and other signs
The mark can be marked on the installation instruction book.
An SPD can be classified into more than one test category (for example, type I test T1 and type II test T2). In this case all
All tests of the test category shall be carried out. If the manufacturer only declares one voltage protection level at this time, the highest voltage protection should appear in the label
Level.
6.1.1.3 Information to be provided with SPD
The information to be provided with SPD is as follows.
1) Installation location (see 5.4);
2) Installation method;
3) Rated short-circuit current ISCPV;
4) The ratings and characteristics of the SPD external disconnector, if an external disconnector is required;
5) Disconnector action indication (if any) or short-circuit device indication (if any);
6) The location of normal use, if it is important;
7) Installation instructions;
8) The type of photovoltaic system (grounded, ungrounded);
9) Expected connection method (/-to ground, to-);
10) Mechanical size and wire length, etc.;
11) Temperature and humidity range (see 4.3 and 4.4);
12) Residual current IPE (AC and DC);
13) SPD failure mode, such as open circuit failure mode or short circuit failure mode;
14) If the SPD claims a short-circuit failure mode, it needs to have a clear mark indicating that it cannot be installed in non-electrically separated power conversion equipment;
15) Imax (if declared by the manufacturer);
16) Continuous current ICPV;
17) If the manufacturer claims that it is a short-circuit failure mode SPD, specific measures should be taken to ensure that the
The generated DC arc is hazardous to the operator.
6.1.1.4 Information that should appear on the product parameter table
The information that should appear on the product parameter table is as follows.
1) The total discharge current Itotal of the multi-pole SPD and the corresponding test level;
2) Information about replaceable parts (indicators, fuses, etc., if applicable);
3) Protection mode (for SPD with more than one protection mode).
6.1.1.5 Information to be provided by the manufacturer during type testing
The information that the manufacturer should provide during the type test is as follows.
1) Whether there are switching elements (see Appendix A);
2) Anticipated continuous flow in the pretreatment test (≤5A or >5A, see Appendix A);
3) If the status indicator circuit does not use a device that has been certified within the rated level, the manufacturer shall provide suitable test standards for it
experimenting;
4) Separate the isolation and dielectric strength of the isolated circuit.
Check whether it meets the requirements by visual inspection.
6.1.2 Logo
The mark should be indelible and easy to identify, and should not be marked on screws and detachable parts.
Note. The plug-in SPD module is considered a non-removable part.
Check whether it meets the requirements by 7.3 test.
6.2 Electrical performance requirements
6.2.1 Prevent direct contact
In order to prevent direct contact (non-contact of conductive parts), SPD should be designed so that its live parts are not allowed after installation under normal conditions of use.
Touched.
In addition to the SPD classification as inaccessible, the SPD should be designed so that after installation and wiring according to normal use, the live parts should be inaccessible
And, even if the parts that can be disassembled without tools are disassembled, they should meet the requirements.
After installation according to the manufacturer's installation instructions, for SPDs that are allowed to be used by unskilled personnel, the live parts are protected against direct connection.
Touch protection shall at least meet the requirements of IEC 60529 for IP2XC.
The connection between the ground terminal and all easily accessible parts connected to it should be low impedance.
According to the test of 8.3.1 of IEC 60529 and IEC 61643-11.2011, it is checked whether it meets the requirements.
6.2.2 Residual IPE
When the SPD has terminals connected to the equipotential bonding conductor, all SPD terminals will be connected under the maximum continuous working voltage (UCPV) of the SPD.
Connect to the power supply and measure IPE.
Check whether it meets the requirements through the 7.4.1 test.
6.2.3 Voltage protection level UP
The limit voltage of SPD should not exceed the voltage protection level specified by the manufacturer.
Pass the test of 8.3.3 in IEC 61643-11.2011 to verify whether it meets the requirements.
6.2.4 Action load test
When the maximum continuous working voltage UCPV is applied, the SPD should be able to withstand the specified discharge current and its characteristics should not be unacceptable.
Variety.
In addition, the voltage switch type SPD or compound type SPD can cut off any freewheeling that is not greater than the rated short-circuit current (ISCPV).
Check whether it meets the requirements through the test of 7.4.2.
6.2.5 Disconnector and status indicator
6.2.5.1 Disconnector
SPDs with open-circuit failure modes should have SPD disconnectors (can be internal or external, or both), their actions
The indication shall be provided through the corresponding status indicator.
Table 4 shows the information of using the disconnector in the type test, and F, G, H and J in Table 5 show the process of the type test and the test
The eligibility criterion for the required performance of the rear release device is to check whether it meets the requirements through the test of 7.4.3.
6.2.5.2 SPD short-circuit device
SPDs in short-circuit failure mode should have short-circuit devices, and their actions should be indicated by corresponding status indicators.
6.2.5.3 Thermal protection
SPD should prevent overheating due to deterioration and overload. Check whether it meets the requirements by the test of 7.4.3.2.Only contains
The SPD of voltage switching element and/or ABD element is not subject to this test.
6.2.5.4 SPD failure mode
The SPD should not cause dangerous consequences when it fails or the SPD should be able to withstand the ISCPV that may occur during its failure.
Check whether it meets the requirements through the test of 7.4.4.
This test does not apply to SPD protection modes that only contain voltage switching components.
Since the DC arc generated when replacing the device may endanger personal and property safety, a plug-in SPD with a short-circuit failure mode
(It can be replaced without tools) The manufacturer needs to declare a suitable disconnection method. Check whether it complies with 6.1.1.3 by checking the installation instructions
The requirements of item 17).
6.2.5.5 Status indicator
The manufacturer shall give information on the function of the indicator and the measures to be taken after the status indication changes.
The status indicator can be composed of two parts (one of which cannot be replaced, for example, when replacing a pluggable module), the two parts are composed of one
A coupling mechanism is connected, and the coupling mechanism can be mechanical, optical, acoustic or electromagnetic, etc. Parts in the status indicator that will not be replaced
(For example, the base) should have the ability to be operated more than 50 times.
The action of the operating state indicator of the coupling mechanism without replacing the part can be simulated by other methods, for example, a separate electromagnet or bomb.
It is not necessary to operate the replaceable parts of the SPD.
When there is a suitable standard for the indication form used, the non-replaceable part of the status indicator should meet this standard, except for the indicator only
Requires 50 operation tests outside.
6.2.6 Insulation resistance
For leakage current and direct contact prevention, the SPD housing should have sufficient insulation resistance.
Through the test of 8.3.6 in IEC 61643-11.2011 to check whether it meets the requirements.
6.2.7 Dielectric strength
For insulation breakdown and direct contact prevention, SPD should have sufficient dielectric strength.
Check whether it meets the requirements through the test of 7.4.5.
6.6 Additional parameters that may be claimed by the manufacturer---Maximum discharge current Imax
If the manufacturer declares Imax, the value should be in accordance with IEC 61643-11.2011 in 8.3.3.1 to apply an impulse current of Imax.
The polarity is the polarity with greater residual pressure in the previous test.
7 Type test
7.1 General
The type test is carried out in accordance with Table 4.Three samples are used for each test series. In any test series, the tests are carried out in the order specified in Table 4.
OK, the order of the test series can be changed. For each structure/terminal type, the terminal should be tested on three terminal samples (one with
At least three SPDs with the same terminal can meet the requirements of terminal test). The general qualification criteria for type testing are shown in Table 5.
If all relevant test clauses and qualification requirements in a certain test series are met, the test product has passed the requirements in Table 4.
Test series.
If all the test products pass the test series, then the SPD design is qualified for this test series. If there are two in the test series
If one or more samples fail the test, the SPD does not comply with this section.
If one test product fails a test, use three new test products to re-run the test project and the previous one in the same test series.
Several test items may affect the results of the test, but this time no sample test failure is allowed.
If the manufacturer agrees, three test samples can be used for more than one test series.
If SPD is an independent part of a product, and the product meets other standards, the requirements of the standard apply to the product
Those parts that are not part of SPD. The SPD should meet the general requirements (6.1), electrical performance requirements (6.2), environment and materials of this part
Requirements (6.4), the mechanical requirements of other standards also apply to SPD.
7.2 General test procedure
7.2.1 General
If there are no other regulations, the reference standard for high voltage test procedures is IEC 61180.
SPD should be installed and electrically connected in accordance with the manufacturer's installation procedures. Unless otherwise specified, this test setup shall run through the entire type
Experimental procedure. No external cooling or heating should be used.
When there are no other regulations, the test should be carried out in the atmosphere, and the ambient temperature should be (20 ± 15) ℃.
For all static DC current measurements like ICPV and IPE, there is no need to consider the initial drop when the voltage is applied, and it does not need to be used within 30s of electrification.
reading.
Unless otherwise specified, when a power supply is required for testing, the instantaneous value of the test voltage when a load current of 1A is flowing should continue to be maintained at
Between Utest and Utest 0-5%.
In order to ensure the comparability of the test results, at least a 6-pulse rectifier bridge is required to limit the maximum ripple under full load conditions.
Note 1.This means that an additional smoothing capacitor is required to meet the 5% requirement when using a 6-pulse rectifier bridge.
When the manufacturer supplies the cable as part of the SPD as a whole, the full length of the cable should be used as part of the SPD under test
test.
If there are no other regulations, maintenance or disassembly of the SPD is not allowed during the test. According to Table 4, if required, according to the manufacturer's regulations
Make sure to select and connect the external disconnector.
If the manufacturer declares multiple protection modes, all tests shall be performed on each protection mode, and a new test product shall be used for each test. but
If some protection modes have the same circuit, a test can be performed on the protection mode that represents the weakest configuration.
If the manufacturer provides the required external
The information of the disconnector should be tested on their combination (each sequence and combination) at this time, and the corresponding external disconnect should be attached to the test.
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 18802.31-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 18802.31-2021_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 18802.31-2021_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 18802.31-2021_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. Question 5: Should I purchase the latest version GB/T 18802.31-2021?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 18802.31-2021 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.
|