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GB/T 2317.4-2023 English PDF (GBT2317.4-2023)

GB/T 2317.4-2023 English PDF (GBT2317.4-2023)

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GB/T 2317.4-2023: Test method for electric power fittings -- Part 4: Acceptance inspection

This Document stipulates the test items, quantities and qualification rules for type tests, sampling tests and routine tests of electric power fittings. This Document applies to electric power fittings (hereinafter referred to as and quot;fittings and quot;) used in 10kV and above AC and DC overhead power lines, substations (converter stations) and power distribution devices in power plant.
GB/T 2317.4-2023
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 29.240.20
CCS K 51
Replacing GB/T 2317.4-2008
Test Method for Electric Power Fittings ?€? Part 4: Acceptance
Inspection
ISSUED ON: MARCH 17, 2023
IMPLEMENTED ON: OCTOBER 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Test Requirements ... 6
5 Acceptance Rules ... 13
Test Method for Electric Power Fittings ?€? Part 4: Acceptance
Inspection
1 Scope
This Document stipulates the test items, quantities and qualification rules for type tests, sampling tests and routine tests of electric power fittings.
This Document applies to electric power fittings (hereinafter referred to as "fittings") used in 10kV and above AC and DC overhead power lines, substations (converter stations) and power distribution devices in power plant.
2 Normative References
The provisions in following documents become the essential provisions of this Document through reference in this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document.
GB/T 2314 General technical requirements for electric power fittings
GB/T 2317.1 Test method for electric power fittings - Part 1: Mechanical tests GB/T 2317.2 Test method for electric power fittings - Part 2: Corona and RIV tests GB/T 2317.3 Test method for electric power fittings - Part 3: Heat cycle tests GB/T 4056 Ball and socket coupling dimensions of string insulator units GB/T 5075 Terminology for electric power fittings
GB/T 35693 Technical specification for valve hall fittings of ??800 kV ultra high voltage direct current (UHVDC) transmission project
DL/T 756 Link fittings
DL/T 763 Technical requirements for overhead line helical fittings
DL/T 765.2 Overhead distribution lines fittings-Part 2:Overhead conductor fittings of rated voltages up to 35kV
DL/T 765.3 Overhead distribution lines fittings - Part 3: Overhead insulated conductor fittings of rated voltages up to 35 kV
DL/T 768.7 Manufacture quality specification for electric power fittings hot dip galvanized coatings on fabricated iron and steel articles
DL/T 1098 Requirements and tests for overhead line spacers
DL/T 1099 Technical requirements and tests for damper
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 5075 apply. 4 Test Requirements
4.1 The general technical conditions of the fittings shall comply with the provisions of GB/T 2314.
4.2 The fitting test is divided into type test, sampling test and routine test. The test items, quantity and requirements for link fittings, tension clamps, splicing fittings and protective fittings shall be carried out according to Table 1. The test items, quantity and requirements for draping clamps shall be carried out according to Table 2. The test items, quantity and requirements for spacer bars shall be carried out according to Table 3. The test items, quantities and requirements of anti-vibration hammer shall be carried out according to Table 4. The test items, quantity and requirements for electric substation fittings shall be carried out according to Table 5.
a) The valve hall fittings meet other test requirements specified in GB/T 35693; b) Pre-twisted fittings meet other test requirements specified in DL/T 763; c) Overhead bare conductor fittings with rated voltage 35kV and below meet other test requirements specified in DL/T 765.2;
d) Overhead insulated conductor fittings with rated voltage 35kV and below meet other test requirements specified in DL/T 765.3;
e) The balls and sockets connected by the ball and socket are inspected piece by piece for "pass" and "stop" gauges. The dimensions of the "pass" and "stop" gauges comply with the provisions of GB/T 4056.
5 Acceptance Rules
5.1 Type test
5.1.1 General requirements
The purpose of the type test is to confirm the design performance of the fittings. It is usually conducted once when the new product is trial-formulated. It shall be repeated when the design, material or process is changed.
5.1.2 The number of tests
The number of fitting tests shall meet the requirements in Tables 1 ~ 5. 5.1.3 Qualification judgment
If all the test pieces meet the requirements, then such product shall be qualified. 5.2 Sampling test
5.2.1 General requirements
The purpose of sampling testing is to verify the performance of materials and products. Sampling tests are conducted by batch; and test samples are randomly selected from the batches submitted for inspection. The purchaser has the right to select the samples to be tested and requires the manufacturer to provide a type test report.
5.2.2 The number of tests
When a batch of products is less than 100 pieces, sampling testing shall not be performed. When the batch size is 100 pieces or more, the sampling quantity is shown in Table 6.

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