GB/T 1692-2008 PDF English
US$155.00 · In stock · Download in 9 secondsGB/T 1692-2008: Vulcanized rubber - Determination of the insulation resistivity Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 1692: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 1692-2008 | English | 155 |
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Vulcanized rubber - Determination of the insulation resistivity
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| GB/T 1692-1992 | English | 359 |
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Vulcanized rubber-Determination of the insuiation resistivity
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GB/T 1692-2008: Vulcanized rubber - Determination of the insulation resistivity---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT1692-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.060
G 40
Replacing GB/T 1692-1992
Vulcanized rubber - Determination of the insulation
resistivity
Issued on: APRIL 01, 2008
Implemented on: SEPTEMBER 01, 2008
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
National Standardization Administration.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Test principle... 5
5 Test equipment... 5
6 Specimen and conditioning... 8
7 Test conditions... 9
8 Test steps... 9
9 Test result expression... 9
10 Test report... 10
Appendix A (Informative) Recommended electrode... 12
Foreword
This standard replaces GB/T 1692-1992 "Vulcanized rubber - Determination of the
insulation resistivity".
The main technical differences between this standard and GB/T 1692-1992 are as
follows.
- ADD the warning words;
- ADD the normative references (see Chapter 2);
- ADD the definitions of volume resistance, volume resistivity, surface resistance,
surface resistivity (see Chapter 3);
- MODIFY the allowable deviation of the thickness of soft rubber specimen (5.1 if
the 1992 edition; 6.1 of this edition);
- MODIFY the specimen treatment (5.2.2 of the 1992 edition; 6.2.4 of this edition);
- MODIFY the relative humidity of the test conditions to 50% ± 5%, to meet the
standard laboratory requirements (6.2 of the 1992 edition; 7.2 of this edition).
Appendix A of this standard is an informative appendix.
This standard was proposed by the China Petroleum and Chemical Industry Association.
This standard shall be under the jurisdiction of the Rubber Physical and Chemical Test
Methods Subcommittee of the National Technical Committee for Standardization of
Rubber and Rubber Products (SAC/TC 35/SC 2).
The drafting organization of this standard. Northwest Rubber and Plastic Research and
Design Institute.
The main drafters of this standard. Zhu Wei, Gao Yun.
The previous versions of this standard.
- GB/T 1692-1979; GB/T 1692-1992.
Rubber, vulcanized - Determination of electrical breakdown
strength and voltage resistant at commercial power
frequency
Warning. People who use this standard shall have practical experience in formal
laboratories. This standard does not point out all possible safety issues. Users are
responsible for taking appropriate safety and health measures and ensuring
compliance with relevant national laws and regulations.
1 Scope
This standard specifies the method for determining the insulation resistivity of
vulcanized rubber.
This standard is applicable to the determination of the insulation resistivity of
vulcanized rubber, which has a resistance greater than 108 Ω.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For the dated references, the subsequent amendments
(excluding corrections) or revisions do not apply to this Standard; however, parties who
reach an agreement based on this Standard are encouraged to study if the latest versions
of these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB/T 2941 Rubber - General procedures for preparing and conditioning test pieces
for physical test methods (GB/T 2941-2006, ISO 23529.2004, IDT)
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Insulation resistance
The ratio -- of the DC voltage on the specimen to the total current flowing through
the specimen -- is called insulation resistance. It includes two parts. volume
resistance and surface resistance.
3.2
Volume resistance
The ratio -- of the DC voltage on the specimen to the current flowing through the
specimen volume, which is expressed by Rv.
3.3
Volume resistivity
The resistance value of the dielectric in the unit volume (cubic centimeters) of the
specimen, which is expressed by ρV.
3.4
Surface resistance
The ratio -- of the DC voltage on the specimen surface to the current flowing through
the specimen surface, expressed as Rs.
3.5
Surface resistivity
If a square of any size is taken on the specimen surface, meanwhile the current
passes through the opposite sides of the square, the resistance value of the square is
the surface resistivity, expressed as ρs.
4 Test principle
Apply a DC voltage to the specimen; measure the leakage current perpendicular to the
specimen or along the specimen surface; calculate the volume resistivity or surface
resistivity of the specimen.
5 Test equipment
The test equipment includes auxiliary electrodes and high resistance meters.
5.1 The auxiliary electrode materials are shown in Table 1.
the specimen).
6.2.4 Place the wiped specimen in a container with a desiccant at a temperature of 23 °C
± 2 °C for 24 h.
6.2.5 If there are special requirements in the product standard, the handling of the
specimen can be carried out in accordance with the product standard.
7 Test conditions
7.1 The test voltage is 1000 V or 500 V; the voltage fluctuation deviation is not more
than 5%.
7.2 The laboratory temperature is 23 °C ± 2 °C; the relative humidity is 50% ± 5%.
7.3 Where there are special requirements for specimen processing, the test can be
carried out according to the requirements.
8 Test steps
8.1 Connect the test instrument; connect the tested specimen to the instrument test end
according to the test requirements, as shown in Figure 4.
8.2 Operate correctly according to the equipment instruction manual and operating
procedures.
When the resistance of the test meter is 1014 Ω or below, read the indication at 1 min.
When the resistance is above 1014 Ω, read the indication at 2 min. Record the indication.
8.3 After each specimen is tested, turn the "discharge-test" switch to the "discharge"
position; turn the input short circuit switch to the "short circuit" position; take out the
specimen. If the test continues, replace the specimen according to the steps of 8.2 and
8.3.
8.4 When all the tests are completed, cut off the power supply. Restore the instrument
to the initial state.
9 Test result expression
9.1 The resistivity is calculated according to the formula in Table 5.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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