1 Scope and object
This standard specifies the seismic qualification for high-voltage switchgear and controlgear, and defines the principle to verify the anti-seismic characteristic by adopting analytical methods, test methods or a combination of both.
It is applicable to all indoor and outdoor high-voltage switchgear and controlgear operated in power systems with a nominal voltage of 3kV or above and a frequency of 50Hz or below, including its supporting frame rigidly connected to the ground.
If the switchgear and controlgear are not mounted on the ground, for example, mounted in a building, the applicable conditions shall be based on the agreement between the user and the manufacturer.
As for the seismic qualifications of switchgear and controlgear (whether integrally mounted or separately mounted), all auxiliary equipment and controlgear are considered.
This standard provides test procedures for verifying the anti-seismic characteristic of ground-mounted high-voltage switchgear and control equipment.
If applicable, the anti-seismic characteristic of switchgear and controlgear shall be verified.
This standard also specifies the ground acceleration level of anti-seismic characteristic, and provides alternative methods suitable for verifying the performance of switchgear and controlgear requiring anti-seismic ability.
2 Normative references
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition applies.
GB 1984 High-voltage alternating-current circuit-breakers (GB 1984-2003, IEC 62271-100:2001, MOD)
GB 1985 High-voltage alternating-current disconnectors and earthing switches (GB 1985-2004, IEC 62271-102:2002, MOD)
GB/T 2423.43 Environmental testing for electric and electronic products - Part 2: Test methods - Mounting of specimens for vibration, impact and similar dynamic tests (GB/T 2423.43-2008, IEC 60068-2-47:2005, IDT)
GB/T 2423.48 Environmental testing for electric and electronic products - Part 2: Test methods - Test Ff: Vibration - Time-history method (GB/T 2423.48-2008, IEC 60068-2-57:1999, IDT)
GB/T 2424.25 Environmental testing for electric and electronic products - Part 3: Test guidance Seismic test methods (GB/T 2424.25-2000, IEC 60068-3-3:1991, IDT)
GB 3906 Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6kV and up to and including 40.5kV (GB 3906-2006, IEC 62271-200:2003, MOD)
GB 7674 Gas-insulated metal-enclosed switchgear for rated voltages of 72.5kV and above (GB 7674-2008, IEC 62271-203:2003, MOD)
GB/T 11022 Common specifications for high-voltage switchgear and controlgear standards (IEC 62271-1, MOD)
GB 17467 High-voltage/low-voltage prefabricated substation (IEC 62271-202, MOD)
3 Terms and definitions
For the purposes of this standard, the terms and definitions specified in GB 1984, GB 1985, GB/T 2424.25, GB 3906, GB 7674, GB/T 11022, GB 17467 apply.
Foreword i
1 Scope and object
2 Normative references
3 Terms and definitions
4 Anti-seismic characteristic test
4.1 General
4.2 Preliminary analysis
5 Seismic level
6 Test verification
6.1 General
6.2 Mounting
6.3 External load
6.4 Measurements
6.5 Frequency range
6.6 Test acceleration
6.7 Test
7 Comprehensive verification by test and analysis
7.1 General
7.2 Vibration and performance data
7.3 Analysis
8 Evaluation of the anti-seismic characteristic
8.1 Combination of stresses
8.2 Acceptance criteria of the seismic test
8.3 Performance evaluation of the test results
8.4 Allowable stresses
9 Documentation
9.1 Information for anti-seismic characteristic test
9.2 Test report
9.3 Analysis report
Annex A (Normative) Characteristics of the test-set
A.1 Low-level excitation
A.2 Free vibration test
Annex B (Informative) Criteria for anti-seismic characteristic adequacy of switchgear and controlgear
B.1 General
B.2 Recommended mounting provisions and practices
Annex C (Informative) Anti-seismic verification report
C.1 Example of cover
C.2 Content examples of anti-seismic analysis verification report
C.3 Content examples of anti-seismic test verification report
Bibliography
