NB/T 10283-2019Test guide for high-voltage alternating-current switch-fuse combinations (English PDF)

1.1 Scope

This standard specifies the laboratory procedures for testing high-voltage AC load switch-fuse combination electrical appliances in accordance with GB/T 16926-2009.

The purpose of this standard is to ensure that there are tests for high-voltage AC load switch-fuse combination electrical appliances in accordance with the GB/T 16926-2009 standard. The same explanation and uniform test and measurement methods.

1.2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document.

GB/T 1984-2014 High voltage AC circuit breaker (IEC 62271-100:2008, MOD)

GB/T 3804-2017 3.6 kV~40.5 kV high voltage AC load switch (IEC 62271-103:2011, MOD)

GB/T 11022-2011 Common technical requirements for high-voltage switchgear and control equipment standards (IEC 62271-1.:2007, MOD)

GB/T 15166.2-2008 High Voltage AC Fuses Part 2: Current Limiting Fuses (IEC 60282-1:2005, MOD)

GB/T 16926-2009 High-voltage AC load switch-fuse combination electrical appliances (IEC 62271-105:2002, MOD)

GB/T 16927.1-2011 High Voltage Test Technology Part 1: General Definition and Test Requirements (IEC 60060-1.:2010, MOD)

NB/T 42101-2016 General Guidelines for Type Test and Type Test Report of High Voltage Switchgear

2.1 Overview

2.1.1 Confirm the information of the sample

GB/T 16926-2009 stipulates in the type test in Chapter 6 that the load switches and fuses used in the combined electrical appliances should be based on GB/T 3804-2017 and GB/T 15166.2-2008 completed the type test. Before testing the combined electrical appliances according to GB/T 16926-2009, The laboratory shall check that the load switch and fuse provided have completed the type test in accordance with the requirements of the national standard. In this regard, the laboratory should check the load switch and melting The test report of the relevant test of the breaker, at the same time, check the compliance of the relevant rated value of the combined electrical appliance and confirm the test product.

The manufacturer has the responsibility to declare to the laboratory whether the load switch constituting the combined electrical appliance has been modified. In particular, the laboratory should check the negative Whether load switches and fuses cause the original test to be invalid due to the following conditions.

--After the fuse is installed, the change of the shell or conductive circuit structure;

--To ensure that the load switch is automatically opened when the fuse is activated, the tripping mechanism is changed.

The manufacturer guarantees that the combined electrical appliance to be tested conforms to the drawings of the model in all details. Each drawing submitted to the laboratory and The data should contain a statement. the drawings and data sent really represent the combined electrical appliance tested.

The laboratory is responsible for verifying that the submitted drawings and data sheets (see Table 1, Table 2 and Table 3) can fully represent the tested product, but the drawings are not correct Responsible for the accuracy of the details. After the final confirmation in the laboratory, each pattern and data sheet representing the combined electrical appliance under test is appropriately marked, And as a test basis.

The detailed drawings and other data should be reduced in number and combined in the type test report, or combined according to the original number in a single As the second part of the report.

After being approved by the laboratory, each drawing and document should be reasonably numbered as a representative of the combined electrical appliance under test and used as the test basis. These ones Sufficient drawings and data should be screened down and placed in the test report, or placed in a separate file as the original document, as the report the second part.

2.1.2 Information provided by the manufacturer

It is necessary to confirm the combined electric appliance under test, and the load switch and fuse of the combined electric appliance under test shall be in accordance with GB/T 3804-2017 and GB/T 15166.2-2008 test equipment for comparison. Therefore, the following information should be provided to the laboratory and included in the test report in.

In order to carry out the combined electrical test, the manufacturer should combine the time-current characteristics of the fuse with the shortest opening time of the load switch.

Provided to the laboratory for the laboratory to determine the appropriate test current. The test report shall include a copy of the time-current characteristic curve. Table 1, Table 2 and Table 3 list the drawings and checklists in detail. Together with the product description given by the manufacturer, it should be sufficient to establish the combination of electrical appliances tested and representatives The connection between the drawings of this model of electrical appliances.

2.1.2.1 Load switches used in combined electrical appliances

Table 2 lists the drawings and checklist in detail. Together with the product description given by the manufacturer, it can be considered sufficient for use in combined electrical appliances

Establish a corresponding relationship between the load switch and the representative drawing. The description of the load switch given by the manufacturer should include at least the following information.

a) General load switches or special load switches, load switches that are only used for combined electrical appliances or used to increase the operating frequency;

b) Description of arc extinguishing process;

c) Description of the operating mechanism;

d) List of replaceable parts.

2.1.2.2 Fuses used in combined electrical appliances

Table 3 lists the drawings and checklist in detail. Together with the product description given by the manufacturer, it can be considered sufficient for use in combined electrical appliances

Establish a corresponding relationship between the fuse and the representative drawing. The manufacturer's description of the fuse should include at least the following information.

a) Design serial number and model;

b) Category, such as. general fuse or backup fuse;

c) Impactor characteristics, such as. light, medium or heavy, spring operation or blasting operation.

2.2 Procedure for issuing type test report

When the load switch-fuse combination electrical appliance is verified by the test to meet the specified technical requirements, one of the following types of type tests can be issued report.

a) Type test report for complete type test The report provides the verification of the rated characteristics proposed by the manufacturer in accordance with items 4.1 to 4.105 of GB/T 16926-2009. Report should All necessary tests are included to prove compliance with the type test requirements in Chapter 6 of GB/T 16926-2009.

b) Type test report of insulation performance The report provides the insulation performance of load switch-fuse combination appliances proposed by the manufacturer in accordance with 4.2 of GB/T 16926-2009 verification. When the test is implemented in accordance with GB/T 16927.1-2011, the report should include the necessary lightning impulse voltage test, power frequency voltage test (including Including wet test, if applicable) to prove compliance with GB/T 16926-2009, 6.2.

c) Type test report of temperature rise performance This report provides the temperature rise poles of load switch-fuse combination electrical appliances proposed by the manufacturer in accordance with GB/T 16926-2009 in 4.4 Limited verification. The report should contain the necessary tests to prove compliance with the requirements of 6.4 and 6.5 of GB/T 16926-2009.

d) Closing and breaking performance type test report For the two types of reports a) and d), the fuse used for combined electrical appliances must complete the current limiting fusing of sub-clause 4.15 of GB/T 15166.2-2008 Special test of the device. If not, the fuse shall be subjected to additional tests in accordance with sub-clause 7.6 of GB/T 15166.2-2008.

2.3 Insulation performance test

The insulation test should be carried out under the most severe conditions when the fuse is installed.

According to GB/T 15166.2-2008 Appendix D, the fuse has a standard size, but the length and shape of the fuse contact are in detail It may still be different and lead to different electric field distributions.

With this in mind, the most demanding conditions should be specified by comparing the tables in the test documents and the relevant drawings of the fuses used. If in doubt, a separate insulation test is necessary.

2.4 Closing and breaking performance test

2.4.1 Conditions for testing

According to GB/T 16926-2009, the closing and breaking test is also applied to the combination electrical appliances that have not been tested or have been partially tested.

(For conditions to be met, see 6.101.1 of GB/T 16926-2009) Applicable. The extension of the validity of the type test cannot pass the laboratory test. It cannot be recorded in the test file.

For other combined electrical appliances, the compliance of the closing and breaking tests is the responsibility of the manufacturer or user (see GB/T 16926-2009 8.102.5).

2.4.2 Breaking test under the condition of rated transfer current (only tripping operation combined electric appliance)

The UC value mentioned in Table 2 of GB/T 16926-2009 will not appear in the working and breaking test. However, the load circuit should be based on these values Make adjustments and verify in accordance with the injection method described in Appendix F of GB/T 1984-2014.

In addition to 6.101.1.4 in accordance with GB/T 16926-2009, the current indicating device can also be grounded by connecting a sensor to Measure this current.

In the test, if the Joule integral of the leakage current is less than 5A2s from the arc starting to 100 ms, it can be considered that there is no obvious leakage Current.

A.1 Overview

The report shall contain all relevant information and results of the closing and breaking current tests.

According to clause A.3 of this appendix, oscillograms should be available in all tests, and all oscillograms should be included in the report.

Regardless of using an oscilloscope or other equivalent tools (including related equipment), the uncertainty of each measurement and the determination of the rated value of the combined electrical appliance The uncertainty of the value (such as test current, test voltage, recovery voltage) shall not exceed ±5%.

Before and after the series test of the combined electrical appliance, take pictures of the sample to record the state of the combined electrical appliance.

The type test report should include a description of the performance of the combined electrical appliance in each test mode, and the description of each test mode and test system The status check description is performed after the column. The description includes the following details.

a) Replacement and adjustment of components in combined electrical appliances (see 6.101.3 and 6.101.4 of GB/T 16926-2009), contacts, arc extinguishing devices, Description of oil (including reduction in quantity), arc extinguishing hood, shell, insulator and casing damage;

b) Description of performance in each test method.

A.2 Information to be included in the report

A.2.1 Overview

See Chapter 7 of NB/T 42101-2016.

A.2.2 General information

If applicable, some or all of the following items should be recorded.

a) Test date;

b) Appendix or report number;

c) Test number;

d) Oscillogram number; e) Photo number.

A.2.3 Electrical appliance under test

If applicable, some or all of the following items should be recorded.

a) Type or factory number;

b) Manufacturer's description;

c) manufacturer; d) Drawing number.

A.2.4 Ratings determined by the manufacturer

If applicable, some or all of the following items should be recorded.

a) Rated voltage, kV;

b) Rated current, A;

c) Rated frequency, Hz;

d) Rated short-circuit making current, kA;

e) Rated short-circuit breaking current, kA;

f) Rated operating voltage, V

i) Closing device; ii) Opening device.

g) Rated transfer current or rated transfer current, kA.

A.2.5 Test conditions (each test method)

If applicable, some or all of the following items should be recorded.

a) Number of poles;

b) Power factor;

c) Frequency, Hz;

d) Neutral point of generator (grounded or insulated);

e) The neutral point of the transformer (grounded or insulated);

f) Short-circuit point (grounded or insulated);

g) Test circuit diagram including grounding point.

A.2.6 Closing and breaking test

A.2.6.1 Test with fuse

If applicable, some or all of the following items should be recorded.

a) Operation method (such as C or CO);

b) Applied voltage, kV;

c) Expected short-circuit closing and breaking current, kA;

d) Cut-off current, kA;

e) The moment of arcing/closing (when appropriate);

f) Power frequency recovery voltage, kV;

g) Expected transient recovery voltage;

h) Fuse action time, ms or s;

i) Breaking time, ms, combined electrical appliances that operate on the trip unit;

j) Closing time, ms, for electric operating devices.

A.2.6.2 Test without fuse

If applicable, some or all of the following items should be recorded.

a) Operation method (such as O);

b) Applied voltage, kV (if relevant);

c) Breaking current

i) The effective value of the AC component, kA, single-phase and average; ii) Percentage of DC component.

d) Power frequency recovery voltage, kV;

e) Expected transient recovery voltage;

f) Arcing time, ms;

g) Opening time, ms, combined electrical appliances operating on the trip unit;

h) Breaking time, ms, combined electrical appliances that operate on the trip unit.

A.2.6.3 Test product status and performance

If applicable, some or all of the following items should be recorded.

a) The state before the test;

b) Performance in the test;

c) The state after the test;

d) Whether there is obvious leakage current;

e) Operation of the impactor.

A.2.7 No-load operation

Time characteristics should be recorded.

a) Before the short circuit or overcurrent test starts;

b) After completing the short circuit or overcurrent test.

A.3 Oscillogram and other records

An oscilloscope or other equivalent tool should record the entire operation. The following parameters should be recorded, some of which can be recorded separately from the oscilloscope.

a) Applied voltage;

b) Current of each pole;

c) Recovery voltage;

d) The current in the closing coil (when applicable);

e) The current in the opening coil (when applicable);

f) Appropriate time scale;

g) Moving contact stroke (when feasible).

Note: Because the laboratory has introduced computer technology in data acquisition and processing, it is possible for the laboratory to obtain information through methods other than traditional oscilloscopes. Graphical display of parameters.