Some standard content:
ICS29.180
Machinery Industry Standard of the People's Republic of China
JB/T10088--2004
Replaces JB/T10088-1999
Sound level for 6kV~500kV power transformers
Sound level for 6kV~500kV power transformers2004-03-12Published
2004-08-01Implementation
Published by the National Development and Reform Commission of the People's Republic of ChinaForeword,
Normative references,| |tt||Measurement method
Measurement of sound power level of load current.
5 Sound level of no-load sound power level and sound power level of load current added 6 Sound level limit of no-load sound power level and sound power level of load current added Appendix A (Informative Appendix) Conversion method of equivalent capacity, conversion of equivalent capacity of three-winding transformer A.1
Conversion of equivalent capacity of autotransformer
JB/T10088—2004
JB/T100882004
This standard replaces JB/T10088—1999 "6~~220kV transformer sound level". Compared with JB/T10088~-1999, the main changes of this standard are as follows: The writing format of the standard shall comply with the provisions of GBT1.1-2000 "Guidelines for Standardization Work Part 1: Structure and Writing Rules of Standards".
The sound level limit is changed from the original A-weighted no-load sound pressure level to the A-weighted sound power level, which is the sum of the no-load sound power level and the load current sound power level, and the limit is redefined. The measurement conditions of the load current sound power level are supplemented. The sound power level calculation formula of the sum of the no-load sound power level and the load current sound power level is supplemented. The sound power level limit of 35kV dry-type transformer is supplemented. The sound power level limit of 330kV and 500kV transformers is supplemented. This standard needs to be used in conjunction with GB/T1094.10-2003 Power Transformer Part 10: Sound Level Determination (IEC60076-10: 2001, MOD).
Appendix A in this standard is an informative appendix. This standard is proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Transformer Standardization (SAC/TC44). The main drafting unit of this standard: Shenyang Transformer Research Institute. The participating drafting units of this standard are: Shenyang Transformer Factory, Baoding Tianwei Baobian Electric Co., Ltd., Xi'an Xidian Transformer Co., Ltd., Shunde Special Transformer Factory, Shandong Jinmanke Electric Group Co., Ltd., Panyu Junfa Electric Equipment Co., Ltd., Wenzhou Substation Equipment General Factory.
The main drafter of this standard is Han Qingheng.
The participating drafters of this standard are: Liu Feng, Zhang Xile, Niu Yamin, Shen Hong, Zhao Xiaochun, Luo Jian, Zhang Linxing. The previous versions of the standards replaced by this standard are: ZBK41005--1989JB/T10088-1999. I
Sound level of 6kV~500kV power transformers
JB/T10088--2004
This standard specifies the A-weighted sound level limit of the no-load sound power level and the load current sound power level of 6kV~500kV power transformers.
This standard applies to oil-immersed power transformers with voltage levels of 500kV and below and dry-type power transformers with voltage levels of 35kV and below. This standard can be used as a reference for other types of transformers. Note: The sound level limits specified in this standard do not apply to amorphous alloy core transformers. The sound level limits of amorphous alloy core transformers are determined by negotiation between the manufacturer and the user.
2 Normative references
The clauses in the following documents become clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GBT1094.10 Power transformer Part 10: Sound level determination (GB/T1094.10-2003, EC60076-10:2001, MOD)
3 Measurement method
Sound level measurement can be carried out by sound pressure method or sound intensity method. The specific measurement method shall be in accordance with the provisions of GB1094.10. 4 Load current sound power level measurement
In order to determine whether the sound level measurement under load current is necessary, the load current sound power level ZwAIN39+181g
can be roughly estimated by formula (1) first:
LwA.IN—A-weighted sound power level estimation value of the transformer at rated current, rated frequency and short-circuit impedance, in dB (A): S——rated capacity, in MVA;
—base capacity, 1MVA.
For autotransformers and three-winding transformers, S is the equivalent capacity. The specific conversion method is shown in Appendix A. If the LwAi value is &dB or lower than the standard value or the guaranteed sound power level, it is not necessary to measure the load current sound level. 5 Sound level obtained by adding the no-load sound power level and the load current sound power level For a transformer operating at rated voltage and rated current, its A-weighted sound power level can be calculated from the A-weighted no-load sound power level and the A-weighted rated current sound power level according to formula (2): LwA=101g(10.wN+100LwA.
Wherein:
LWA·SN
（2）
The A-weighted sound power level (load sound level) of the transformer at sinusoidal rated voltage, sinusoidal rated current and rated frequency, in dB (A):
JB/T10088-2004
The A-weighted sound power level (no-load sound level) of the transformer at sinusoidal rated voltage, rated frequency and no-load current, in dB (A):
The A-weighted sound power level (no-load sound level) of the transformer at sinusoidal rated voltage, rated frequency and no-load current, in dB (A): A-weighted sound power level at rated current (load current sound level), in dB (A). If necessary, the noise of cooling equipment should be considered to be included in LWAUN or LWAIN. Sound level limit of the sum of no-load sound power level and load current sound power level 6
6.1 The sound power level of oil-immersed power transformers with a capacity of 30kVA to 63000kVA and voltage levels of 6kV, 10kV, 20kV, 35kV and 66kV should not exceed the limits specified in Table 1. Equivalent capacity (kVA) 1
Voltage level (kv)
30/6~10
50/635
63/635
80/6~35
100/6~35
125/6~3 5 | | tt | 50/6~66
1600/6~66
2000/6~66
2500/6~66
3150/6~66
4000/6~66
5.000/6~66
6300/10~66
8000/35~66||tt ||1O000/35~66| |tt||12500/35 ~ 66 ||tt | 63000/35--66
Sound power level LwASN
Oil immersed self-cooling (ONAN)
Oil immersed air cooling (ONAF)
JB/T10088—2004
6.2 The sound power level of oil immersed power transformer with capacity of 6300kVA~120000kVA and voltage level of 110kV shall not exceed the limit specified in Table 2.
Equivalent capacity
Sound power level LWA.SN
dB (A)
Oil-immersed self-cooling (ONAN) or forced oil-water cooling (OFWF)75
Oil-immersed air-cooling (ONAF) or forced oil-air cooling (OFAF)81
The sound power level of oil-immersed power transformer with a capacity of 31500kVA ~ 360000kVA and a voltage level of 220kV shall not exceed the limit specified in Table 3.
Equivalent capacity
180000
240000
Sound power level LWA.SN
Oil immersed self-cooling (ONAN) or forced oil-water cooling (OFWF)87
Oil immersed air cooling (ONAF) or forced oil-air cooling (OFAF)91
The sound power level of dry-type power transformers with a capacity of 30kVA~6300kVA and a voltage level of 6kV and 10kV should be Not exceeding the limit specified in Table 6.4
4,
JB/T10088-2G04
equivalent capacity
sound power level LWA.SN
self-cooled (AN) or sealed self-cooled (GNAN) 63
The sound power level of dry-type power transformers with a capacity of 50kVA ~ 20000kVA and a voltage level of 35kV shall not exceed the limit specified in Table 56.5
.
Equivalent capacity
Sound power level LwAsN
dB (A)
Self-cooled (AN) or sealed self-cooled (GNAN)64
Equivalent capacity
Table 5 (continued)
Sound power level LWASN
dB (A)
Self-cooled (AN) or sealed self-cooled (GNAN)72
JB/T10088-2004
6.6 The sound power level of oil-immersed power transformers with a capacity of 9000kVA to 720000kVA and a voltage level of 330kV and 500kV shall not exceed the limit values specified in Table 6.
Equivalent capacity
90000~333000
360000~720000
Sound power level LwA.SN
dB (A)bzxZ.net
Oil-enhanced air cooling (OFAF)
6.7 The equivalent capacity listed in this standard is the equivalent capacity equivalent to the rated capacity of a double-winding transformer. For multi-winding transformers and autotransformers, the conversion method is shown in Appendix A.
6.8 When the voltage level and equivalent capacity of the transformer do not correspond to the values listed in the table, the sound power level limit should be determined according to the closest voltage level or the capacity of the larger level.
6.9 For transformers with multiple capacities due to different cooling methods, the sound power level limit should be determined according to the maximum capacity and its corresponding cooling method.
JB/T10088--2004
Appendix A
(Informative Appendix)
Conversion method of equivalent capacity
The capacity listed in the table of this standard is equivalent to the equivalent capacity of a double-winding transformer. Therefore, for a double-winding transformer, the equivalent capacity is the rated capacity of the transformer. For a multi-winding transformer and an autotransformer, it should be converted to the equivalent capacity of a double-winding transformer. A.1 Conversion of equivalent capacity of a three-winding transformer The equivalent capacity of a three-winding transformer is equal to half of the arithmetic sum of the rated capacities of each winding. Example: For a transformer with product model SFSZ-20000/110, the capacity of its high, medium and low voltage windings is 20000kVA, 20000kVA and 20000kVA respectively. The equivalent capacity of this three-winding transformer is (20000+20000+20000)2=30000kVA. A.2 Calculation of equivalent capacity of autotransformer The equivalent capacity of autotransformer is equal to the sum of the rated capacity of the two autotransformer windings multiplied by the efficiency coefficient, plus half of the sum of the capacity of the third winding.
Example: For a transformer with product model OSFPS--240000/220, the rated capacity distribution and rated voltage of each winding are 240000kVA/242kV, 240000kVA/121kV and 180000kVA/15.75kV respectively. The equivalent capacity of this self-supporting transformer is: 1/2[0.5 (240000 + 240000) + 180000] = 210000 kVA.
People's Republic of China
Mechanical Industry Standard
6kV~500kV Power Transformer Sound Level
JB/T10088—2004
Published and distributed by Machinery Industry Press
No. 22 Baiwanzhuang Street, Beijing
Postal Code: 10003 7
Format 890mm×1240mm1/16?0.75 printing sheet?17,000 words1st edition, first printing, August 2004
Book number: 151117334
Website: http://cmpbook.comEditorial department phone: (010) 88379779
Direct sales center phone: (010 88379693The cover without anti-counterfeiting label is pirated
Infringement will be investigated
Copyright reserved2 Calculation of equivalent capacity of autotransformer The equivalent capacity of autotransformer is equal to the sum of the rated capacity of the two autotransformer side windings multiplied by the efficiency coefficient, plus half of the sum of the capacity of the third winding.
Example: The rated capacity distribution and rated voltage of each winding of the transformer with product model OSFPS--240000/220 are 240000kVA/242kV, 240000kVA/121kV, and 180000kVA/15.75kV respectively. The equivalent capacity of this self-supporting transformer is: 1/2[0.5 (240000 + 240000) + 180000] = 210000 kVA.
People's Republic of China
Mechanical Industry Standard
6kV~500kV Power Transformer Sound Level
JB/T10088—2004
Published and distributed by Machinery Industry Press
No. 22 Baiwanzhuang Street, Beijing
Postal Code: 10003 7
Format 890mm×1240mm1/16?0.75 printing sheet?17,000 words1st edition, first printing, August 2004
Book number: 151117334
Website: http://cmpbook.comEditorial department phone: (010) 88379779
Direct sales center phone: (010 88379693The cover without anti-counterfeiting label is pirated
Infringement will be investigated
Copyright reserved2 Calculation of equivalent capacity of autotransformer The equivalent capacity of autotransformer is equal to the sum of the rated capacity of the two autotransformer side windings multiplied by the efficiency coefficient, plus half of the sum of the capacity of the third winding.
Example: The rated capacity distribution and rated voltage of each winding of the transformer with product model OSFPS--240000/220 are 240000kVA/242kV, 240000kVA/121kV, and 180000kVA/15.75kV respectively. The equivalent capacity of this self-supporting transformer is: 1/2[0.5 (240000 + 240000) + 180000] = 210000 kVA.
People's Republic of China
Mechanical Industry Standard
6kV~500kV Power Transformer Sound Level
JB/T10088—2004
Published and distributed by Machinery Industry Press
No. 22 Baiwanzhuang Street, Beijing
Postal Code: 10003 7
Format 890mm×1240mm1/16?0.75 printing sheet?17,000 words1st edition, first printing, August 2004
Book number: 151117334
Website: http://cmpbook.comEditorial department phone: (010) 88379779
Direct sales center phone: (010 88379693The cover without anti-counterfeiting label is pirated
Infringement will be investigated
Copyright reserved
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