This standard specifies the general requirements, test procedures and judgment criteria for radio interference tests on clean and dry insulators (including bushings, branch insulators, rigid insulators, insulator components and insulator components) in the laboratory. This standard is only applicable to clean and dry insulators. The influence of moisture or dirt on the surface of insulators is not considered in this standard. This standard is only used as part of the type test of the insulator product when it is cited in the product standard of the insulator. JB/T 3567-1999 Radio interference test method for high-voltage insulators JB/T3567-1999 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3567
1999-08-06
Wa
2000-01-01
JB/T3567bzxz.net
This standard is a revision of JB3567-84 "Radio Interference Test Method for High Voltage Insulators" based on IEC60437:1997 "Radio Interference Test for High Voltage Insulators". It is technically equivalent to international standards and its writing rules are in accordance with the provisions of GB/T1.1-1993. Compared with JB3567-84, this standard has technically adopted the results of international radio interference tests and research in recent years and standardized the test methods for radio interference tests on insulators in experiments. The national foreword has been added and the IEC foreword has been retained. This standard will replace JB3567-84 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Insulator Standardization. This standard was drafted by Xi'an Electric Ceramics Research Institute. Drafters of this standard: Ai Chao, Wei Fu.
This standard was first published in 1984.
JB/T3567
This International Standard IEC60437 was prepared by IEC Technical Committee 36 "Insulation". This second edition of the standard deletes and replaces the first edition published as a technical report in 1973. This edition is a technical revision and has now become an international standard.
The text of this standard is based on the following documents:
36/150/FDIS
Voting Report
36/154/RVD
All the documents for the vote to approve this standard can be found in the voting report indicated in the table above. I
1 Scope
JB/T35671999
JB356784
This standard specifies the general requirements, test procedures and judgment criteria for radio interference tests on clean and dry insulators (including bushings, post insulators, rigid insulators, insulator string components and insulator strings) in the laboratory. This standard is only applicable to clean and dry insulators. The effects of moisture or contamination on the surface of insulators are not within the scope of this standard.
This standard shall only be used as part of the type test of the insulator product when it is referenced in the product standard of the insulator. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 2900. 8--1995
GB/T 16927.1—1997
CISPR 16—1 1993
3 Definitions
Electrical terminology Insulators
High voltage test technology Part 1, General test requirements (negIEC60060—1:1989) Specification for radio interference and immunity measuring instruments and measurement methods Part 1, Radio interference and immunity measuring instruments
The definitions of terms used in this standard are in accordance with the provisions of GB/T2900.8. 4 General provisions for testing
4. 1 General test conditions
The test conditions in this standard shall comply with the provisions of Chapter 6 on "Test voltage" in GB/T16927.1-1997. Test atmospheric conditions:
Temperature 10~35℃
- Atmospheric pressure 87107kPa
- Relative humidity 45%~75%
No atmospheric correction shall be made for either the test voltage or the radio interference measurement value. 4.2 Measurement frequency
The measurement of radio interference characteristics shall be carried out at a frequency of (1.0±0.1) MHz or at other frequencies between 0.5 and 2.0 MHz when agreed.
4.3 Background level provisions
The radio interference level generated by the test site and the test circuit shall be negligible compared with the level measured from the test product under the test voltage. When there are difficulties due to conditions, the background level shall be at least 6dB lower than the lowest level of the tested product. 4. 4 Measuring instruments
Normally, the instruments specified in CISPR16-1 should be used. With the agreement between the user and the manufacturer, other measuring instruments may be used, but the measurement must be convertible into the standard value
5 Test pieces and installation of test pieces
JB/T35671999
5.1 Before the test, the surface of the test piece should be treated as necessary to ensure that the surface of the insulator is clean and free of any dust, fiber or dirt that may affect the level of radio interference.
5.2 During the test, the ambient temperature of the test piece and the laboratory should reach thermal equilibrium to avoid any condensation on its surface. 5.3 When the insulator is installed for radio interference testing, it should be fully equipped with any accessories specified by the user or manufacturer (including Including various stress control devices). They should be installed according to the standard installation method specified in GB/T16927.1 or in a manner that simulates operating conditions. The installation method, the presence of angles, grading rings, conductors and their relative positions to the insulators may affect the measurement results. Therefore, the layout of the simulated operating case should be as representative as possible. All connections should ensure good contact. If necessary, appropriate protective measures can be taken to avoid partial discharge.
6 Selection of test circuits and circuit parameters
6.1 The test circuit should be as shown in Figure 1
Grounding structure
Simulated conductor
\M"Another option
"M\ details
T-power frequency test transformer, F-filter, M-test circuit, .-capacitor or capacitor and inductor connected combination circuit L-inductor: g-protection interval; R,-sampling resistor; R-matching resistor: m-measuring instrument, R,-internal resistance of measuring instrument Figure 1 Radio interference test circuit diagram
6.2 Provisions for selection of test circuit parameters
6.2.1 Filter (F)
The filter should have high impedance at the measuring frequency, and its impedance value is generally between 10 and 20k0. 6.2.2 Equivalent resistance (RL)
Resistor R, which is equivalent to the internal resistance R of the measuring instrument. After parallel connection, it is connected in series with resistor R1 to form an equivalent resistor R2, and its resistance is preferably 300. 6.2.3 Capacitor (Zs)
can be a capacitor or a series combination of a capacitor and an inductor. When R1 is about 300, at the measured frequency, the impedance value of Zs and R1 in series should be (300±40)0, and the phase angle 8<20°. 6.2.4 Inductor (L)
has low impedance at 50Hz and high impedance (usually ≥3k) at the measured frequency. 6.2.5 Protective gap (g)
The protective discharge gap has a maximum discharge voltage of ≤500V at 50Hz. 6.2.6 Calibration of the test circuit
When the test circuit is put into use for the first time or the circuit layout is changed, or the capacitance of the test product is significantly different, the circuit should be calibrated to ensure the accuracy and effectiveness of the measurement.
7 Test procedure, expression and judgment of measurement results 7.1 Test procedure
This standard does not specify the limit values ​​of the test voltage and radio interference level. When the test is required, the relevant values ​​depend on the product standard or the agreement between the user and the manufacturer. If there is no specified test voltage value, it is recommended to measure its radio interference characteristics within the voltage range of 3% to 30% of the power frequency dry flashover voltage of the test product.
During the test, the following standard procedure should be adopted: a voltage 10% higher than the specified test voltage is applied to the insulator under test and maintained for at least 15 minutes, then the voltage is gradually reduced to 30% of the specified test voltage, then gradually increased to the initial value and maintained for 1 minute, and finally gradually reduced to the 30% value. Each voltage step difference is approximately 10% of the specified test voltage.
Carry out radio interference measurement at each level and make a curve of the relationship between the results obtained during the last drop process and the measured voltage. The obtained curve is the radio interference characteristic curve of the insulator. 7.2 Expression of measurement results
The measurement results should be expressed in decibel values ​​corresponding to the reference of 1μV on a 300α resistor. A=20 lgU/Uo
Where, A—decibel value t
Uo-reference voltage, 1 μV;
U——measured interference voltage, μV.
7.3 Result determination
If the radio interference level read from the radio interference characteristic curve at the specified test voltage does not exceed the specified value, the insulator is considered to have passed the test.
8 Test report
The test report should contain the following details
8) Name of the manufacturer,
b) Type marking or necessary description of the insulator under test c) Details of the test arrangement including dimensions: d) Atmospheric conditions prevailing during the test: e) Description of the installation arrangement of the test product:
f) Measurement frequency and background interference level,
g) Radio interference characteristics of the insulator under test. 3
JB/T3567
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