Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T10217
2000-11-29
Wa Xian Ji Dong
2001-01-01
JB/T102172000
This standard is a recommended industry standard.
This standard is formulated to promote the improvement and development of the domestic combined transformer product level, ensure product quality, promote technological progress, facilitate the technical development of combined transformer products, and meet the needs of production and use. The format and structure of this standard are in accordance with GB/T1.1-1993 "Guidelines for Standardization Work Unit 1: Drafting and Expression Rules of Standards Part 1: Provisions for Standard Preparation" and GB/T1.3-1997 "Guidelines for Standardization Work Unit 1: Drafting and Expression Rules of Standards Part 3: Provisions for Product Standard Preparation". The technical content of this standard is mainly based on GB1094.1-1996 "Power Transformer Part - General Principles", GB1094.2-1996 "Power Transformer Part 1 Temperature Rise", GB1094.3-1985 "Power Transformer Part 3 Insulation Level and Insulation Test", GB1094.5-1985 "Power Transformer Part 5 Short Circuit Withstand Capability", GB/T6451-1999 "Three-phase Oil-diffused Power Transformer Technical Parameters and Requirements", G D/T11022-1999 "Common Technical Requirements for High-voltage Switchgear and Control Equipment", GB15166.2-1994 & AC High-voltage Fuse Current Limiting Fuse", GB/T14048.1-1993 "General Principles for Low-voltage Switchgear and Control Equipment" and 1GB7251.1-1997 "Low-voltage Complete Switchgear and Control Equipment Part 1: Type Test and Partial Type Test Complete Equipment", and combined with the specific requirements of domestic combined transformer products. This standard is proposed and managed by the National Technical Committee for Transformer Standardization. The main drafting unit of this standard: Shenyang Transformer Research Institute. Participating drafting units of this standard: Zhejiang Sanbian Group Co., Ltd., Hangzhou Qianjiang Electric Group Co., Ltd., Ningbo Tianan Group Transformer Factory, Dongguan Transformer Factory, Sichuan Anyue Puhua Electric Equipment Co., Ltd., Shandong Modern Dachi Group Co., Ltd., Guangdong Shunde Special Transformer Factory, Shandong Jinmanke Electric Group Co., Ltd., Jinzhou Transformer Factory, Zhejiang Jiangshan Transformer Co., Ltd., Zhejiang Jiangshan Special Transformer Factory, Zhejiang Power Transformer Factory. The main drafters of this standard are: Lin Ran, Zhang Zhongguo, He Zhenhao, Wang Jianli, Zhu Yongli, Zhu Wenguang, Li Changfeng, Ma Xiaokun, Hu Cheng, Niu Yemin, Jiang Mingwei, Li Jiangfeng, Jiang Fangjun, Yu Deming, Huang Yongbiao. This standard was first formulated in 1999.
This standard is interpreted by Shenyang Transformer Research Institute. 1you
JB/T102172000
This standard specifies the use conditions, product classification, product model, basic parameters, technical requirements, test methods, inspection rules, marking, lifting, packaging, transportation and storage of combined transformers. This standard is applicable to combined transformers with voltage levels of 6 and 10kV, rated capacity of 30~1600kVA, and rated frequency of 50Hz. For combined transformers with rated capacity greater than 1600kVA and voltage level of 20kV, this standard can be used as a reference. Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, 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 191-1990
GB 311.1—1997
GB 1094.1—1996
GB 1094.2—1996
GB 1094.3 :- 1985
GB 1094.5—1985
GB/T 2900.1—1992
Packaging, storage and transportation pictorial marking
Insulation coordination of high-voltage power transmission and transformation equipment (negEC60071-1:1993) Power transformers Part 1 General provisions (eqvIEC60076-1:1993) Power transformers Part 2 Source rise
(eqvIEC60076-2:1993)
Power transformers Part 3 Insulation levels and insulation tests (neq IEC60076-3:1980)
Power transformers Part 5 Capability to withstand short circuits (neqIEC60076-3:1976)
Electrical terminology Basic terms (negIECS0) GBT2900.15—1997 Electrical terminology Transformers, instrument transformers, voltage regulators and reactors (negIEC50 (421):1990, IEC50 (321):1986) GB/T2900.20-1994 Electrical terminology High-voltage switchgear (negIEC50) GB 3804—1990
GB 4208-1993
GB/T6451—1999
GB 7251.J-1997
GB/T 7328—1987
3~63kV AC commercial pressure load switch (neqIEc265-1:1983)Enclosure protection degree (IP code) (egvIEC529:1989)Technical parameters and requirements of three-phase oil-immersed power transformersLow-voltage complete switchgear and control equipment Part 1: Type test and partial type test complete equipment (idt JEC439-1: 1992)
Determination of sound level of transformers and reactors (negIEC551:1987)GB/T 11022--1999
Common technical requirements for high-voltage switchgear and control equipment (eqvIEC694:199G)GB/T 14048.1—1993
GB 15166.2—1994
GB/T 16927.1—1997
GB/T 16927.2—1997
General rules for low-voltage switchgear and controlgear (eqvIEC947-1:1988) AC high-voltage fuses Current-limiting fuses (negIEC282-1:1985) High voltage test technology Part 1: General test requirements (cvIEC60060-1:1989) High voltage test technology Part 2: Measurement system (eqvJEC60060-2:1994) Wa Extremely Slow 2000-11-29
2001-01-01 Small cable
GBT 16935.1—1997
JB/T 3837-1996
3 Definitions
JB/T102172000
Insulation coordination of equipment in low-voltage systems Part 1: Principles, requirements and tests (idt IEC664-1: 1992)
Model compilation method for transformer products
This standard adopts the following definitions. The definitions of other terms shall be in accordance with the provisions of GB/T2900.1, GB/T2900.15 and GB/T2900.20. 3.1 Combination transformer
A transformer that combines the transformer body, switchgear, fuse, tap changer and corresponding auxiliary equipment. 3.2 Electrical components
Combination transformers are basic components that provide a specific function (such as load switching, fuses, etc.). 3.3 Circuit
The circuit of all conductive parts contained in the combined transformer for transmitting electrical energy. 3.4 Auxiliary circuitwwW.bzxz.Net
The circuit for all conductive parts (excluding the main circuit) such as control, measurement, and lighting included in the combined transformer. 3.5 Box
A combination of a sealed oil tank and a sealed high and low voltage chamber. 3.6 Box
A sealed container for placing the body and electrical components such as high voltage switches and insulating oil. 3.7 High and low voltage chamber
With the help of the oil tank, the high and low voltage cable connections and the operation and control parts of the electrical components are enclosed by steel plates. 4 Conditions of use
4. 1 Normal conditions of use
a: Altitude
Altitude does not exceed 1000ml.
b, Ambient temperature
Highest temperature
Average temperature of the hottest month
Highest annual average temperature
Lowest temperature
cRelative humidity
F40℃:
130℃:
+20℃
-25℃ (outdoor): -5℃ (indoor). At 25℃, the relative humidity of the air shall not exceed 95%, and the monthly average shall not exceed 90%. d.Installation environment
The installation environment should be free of obvious pollution, explosive, corrosive gas and dust, and the installation site should be free of severe vibration and shock. The ground acceleration caused by earthquake is less than 3m/s in the horizontal direction and less than 1.5m/s in the vertical direction (earthquake problems within this limit do not need to be specially considered in the design).
e. Waveform of power supply voltage
The waveform of power supply voltage is similar to sine wave
JB/T102172000
Note: For public power supply systems, this requirement is not mandatory. However, when there are strong current load equipment, it should be tested according to traditional rules; the total harmonic content in the distorted waveform is not more than 5%, and the secondary harmonic content is not more than 1%. At the same time, the impact of harmonic current on negative loss and overflow should also be considered.
f. Symmetrical three-phase power supply voltage
For three-phase combined transformers, the three-phase power supply voltage should be roughly symmetrical. 4.2 Special conditions of use
Except for the above normal conditions of use, other conditions of use shall comply with the provisions of GB1094.1, GBT11022, GB/T14048.1 and GB7251.1.
5 Product classification and product model
5.1 Product classification
Products can generally be divided into common tank type and separate tank type according to the oil tank structure: a) Common tank type generally means that the high-voltage electrical components and the transformer body share a transformer oil tank; b) Separate tank type generally means that the high-voltage electrical components such as load switches are placed in one oil tank separately; and other high-voltage electrical components and the transformer body are placed in another oil tank, and the oil path between the two oil tanks is not connected. 5.2 Product model
Combined transformer product model composition type: 1
Special use environment code
Voltage level kv
Expected capacity kVA
High voltage wiring scheme
Performance level code
Component transformer product model
Note: Product performance level code, namely product performance level code & special use environment code are all specified in 1B/T3837. JB/T102172000
5.2.2 The alphabetical order and meaning of the product model of combined transformers shall be in accordance with the provisions of Table 1 [The alphabetical order and meaning of the product model of combined transformers Serial number
Insulating oil
Coil wire material
Core material
Commercial wiring scheme
"Combined" transformer
"Common" box type
"Separate" box type
"Single" phase
"Blue" phase
General transformer oil
Difficult to "burn" oil
Copper "cobalt"| |tt||“Aluminum” “foil”
Electrical steel sheet
Amorphous “alloy”
Ring” network
“terminal”
Represented by
Example: Common box type combined transformer, two phases, low voltage uses copper foil winding, iron core uses amorphous alloy, general transformer oil, rated capacity 500kVA, high voltage wiring scheme is ring network type, voltage level 10kV, product performance level code is 10, the product model is:
ZGSBH10—H—500/10.
6 Basic parameters
6. 1 Rated voltage
Low voltage side
High voltage side Equipment maximum voltage
Auxiliary circuit
6.2 Rated capacity
6, 10kV:
7.2, 12kV;
110, 220, 380V.
30, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1000, 1250, 1600kVA. 6.3 High voltage tapping range 5%.
Note: According to the user's request for high voltage tapping range of the instrument, the main 2×2.5% can be provided: 6.4 Connection group code Dyn11, Yyno.
6.5 Rated current of high and low voltage electrical components
6.5.1 Rated current of high and low voltage electrical components 6.3, 8, 10, 12.5, 1G, 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 4
500.630A.
6.5.2 Rated current of low voltage electrical components
JB/T102172000
50, 63, 100, 160, 200, 250, 315, 400, 500, 630, 800, 1000, 1250, 1600, 2000, 2500, 3150A. 6.5.3 Rated short-circuit breaking current of high-voltage fuse 2.5, 3.5, 6.3, 8, 10, 12.5, 16, 20, 25, 31.5, 40, 50kA. 6.5.4 Rated short-time withstand current (rated short-circuit duration) of high-voltage load switch 12.5, 16, 20, 25kA (2s).
6.5.5 Rated peak withstand current of high-voltage load switch 31.5, 40, 50, 63kA.
6.5.6 Rated short-circuit closing current of high-voltage load switch 31.5, 40, 50, 63kA
6.6 Rated frequency 50Hz.
6.7 Insulation level
The insulation level of combined transformer shall comply with the provisions of Table 2. The insulation level of selected commercial voltage electrical components and low voltage electrical components shall comply with the provisions of Table 3 and Table 4.
Insulation level of combined transformer
Rated voltage
(RMS value)
Rated voltage
(RMS value)
Set each layer
(RMS value)
Highest voltage of equipment
(RMS value)
Rated lightning impulse withstand voltage (peak value) full wave
Insulation level of high-voltage electrical components
Rated lightning impulse withstand voltage
(peak value)
Note: For products with disconnectable disconnection, the insulation level shall comply with GB/T 11022. Insulation level of low voltage electrical components
rated voltage
rated short-time power frequency withstand
positive (1min)
(RMS》
60≤300
300UiM660
rated short-time power frequency withstand
voltage (Imin)
(RMS value)
rated short-time T-frequency withstand voltage (Irmin) (RMS value)
660AUi800
800Ui≤1000
6.8 sound level
JB/T102172000| |tt||Under no-load condition, the sound level (A-weighted sound pressure level) of the combined transformer shall not exceed 55dB (A). Note: The sound level of the amorphous alloy core combined transformer shall be determined by the manufacturer and the user department through consultation. 6.9 Shell protection grade
Indoor type: IP2X:
Outdoor type: IP33.
6.10 Temperature rise limit
6.10.1 The temperature rise limit of the transformer shall comply with GB1094.2. 6.10.2 The temperature rise limit of high-voltage electrical equipment shall comply with GB/T11022. 6.10.3 The leakage rise limit of low-voltage electrical equipment shall comply with GB7251.1 7 Technical requirements
7. Basic requirements
Combined transformers manufactured according to this standard shall comply with the provisions of GB1094.1, GB1094.2, GB1094.3 and GB1094.5. 7.1.1 Technical parameters
The performance parameters of combined transformers (no-load loss, load loss, no-load current, short-circuit impedance) shall comply with the provisions of GB/T6451.
7.1.2 Allowable deviation of performance parameters
The allowable deviation of performance parameters of combined transformers shall comply with the provisions of GB1094.1. 7.2 Overall structural requirements
Combined transformers The design of the transformer should be able to ensure safe normal use, inspection and maintenance. 7.3 Box
7.3.1 Combined transformers are usually cooled by natural ventilation. 7.3.2 The sealing parts of the oil tank should be reliable and durable, and there should be no oil leakage. 7.3.3 The doors of the high and low voltage rooms of the combined transformer open outwards and should have handles and locks. The opening angle of the door should not be less than 90°: and a positioning device should be provided. The structure should be interlocked to ensure that the door of the high voltage room can only be opened when the door of the low voltage room is opened. 7.3.4 The welding and assembly of the box should be firm, the welds should be smooth and uniform, and there should be no welding penetration, cracks, slag splashing, pores, etc. 7.3.5 The box body should be treated with anti-rust, and the paint color should be uniform and strong in adhesion. The paint film should not have cracks, flow marks, pinholes, spots, bubbles and attachments.
7.3.6 The high and low voltage rooms should be separated by old metal partitions. 7.3.7 The box body should have a lifting device, and the entire combined transformer should be balanced in the vertical direction when lifting. 7.3.8 The mechanical strength of the combined transformer oil tank should meet the requirements of no damage and unallowed permanent deformation under the state of positive lifting and transportation, and should withstand the mechanical strength positive pressure test specified in GB/T6451. .3.9 The oil tank and high and low voltage rooms should not have exposed removable screws, bolts, hinges or other components, and no gaps should be left to prevent objects such as sticks or wires from entering their interior and touching live parts. 6
JB/T102172000
7.3.10 The parts (or holes) used for fixing should be placed at the bottom edge of the high and low voltage chambers. After the transformer is installed and fixed, it can only be disassembled in the commercial low voltage chambers.
7.4 Grounding
7.4.1 The main grounding point in the combined transformer should have an obvious grounding mark. There should be no less than two terminals connected to the grounding system in the box.
7.4.2 High-resistance electrical components and metal parts that need to be grounded should be effectively grounded.7.5 Mechanical properties
The mechanical properties of the electrical components used in the combined transformer should comply with the provisions of the relevant standards and technical conditions. 7.6 The combined transformer oil tank should be equipped with a pressure release protection device. 7.7 The combined transformer oil tank should be equipped with an oil level indicator to monitor the oil level at any time. 7.8 The combined transformer oil should have a temperature gauge to measure the temperature so that the temperature can be monitored at any time. 7.9 The combined transformer oil tank shall be equipped with oil filling and draining valves. 7.10 The combined transformer oil tank shall be equipped with fuses, which shall comply with the provisions of GB15166.2. 7.11 The load switch, off-excitation tap changer and other components or parts selected for the combined transformer shall comply with the provisions of the relevant standards. 8 Test methods
8.1 General inspection
General inspection includes:
a) The appearance should be neat and beautiful, with clear markings; b) The wiring should be correct and reasonable, and meet the requirements of the drawings; c) The opening, closing and interlocking of the door should be flexible and pushable; d) The extension of the cable head should be reliable and safe; e) The replacement of the fuse should be reliable and safe; ) The grounding circuit should be reliable and safe.
8.2 Mechanical test
8.2.1 Mechanical operation test
The high-voltage load switch should rotate flexibly after continuous anti-reverse operation of 5 rings in the non-powered state. Note: For some products with special structures, the test methods shall be in accordance with the corresponding technical conditions. 8.2.2 Mechanical life test
For high and low voltage switches and other operable components and parts, mechanical life tests shall be carried out in accordance with the corresponding standards. Method: When the equipment and parts selected are already finalized products and the original installation and use conditions have not been changed, the test reports issued can be used as the basis for verification.
8.3 Insulation test
8.3.1 Routine insulation test
Combined transformers shall be subjected to routine insulation tests in accordance with GB/TI6927.1, GB/T16927.2, GB1094.3 and GBT16935.1.
8.3.2 Lightning impulse test
JB/T102172000
Combined transformers should be subjected to lightning impulse test in accordance with GB/T16927.1, GB/T16927.2 and GB1094.3. 8.4 Mechanical strength test and sealing test of oil tank 8.4.1 The oil tank shall be subjected to mechanical strength test and meet the requirements of 7.3.8. The test shall be in accordance with the provisions of GB/T6451. 8.4.2 The oil tank shall be subjected to sealing test. The test shall be in accordance with the provisions of GB/T6451. 8.5 Temperature rise test
8.5.1 Test conditions
It shall be carried out on a fully assembled combined transformer. The door and cable entrance shall be closed according to the conditions of use. The test circuit shall include high-voltage circuit, transformer and low-voltage circuit. 8.5.2 Test method
a) The temperature rise test method of the combined transformer shall be carried out in accordance with the provisions of GB1094.2: b) The temperature rise test method of the main circuit of low-voltage electrical appliances shall be carried out in accordance with the provisions of GB7251.1. Note: When the test current is less than the rated current of the low-voltage electrical components and connecting joints of the finalized product, the temperature rise of the high-voltage and low-voltage electrical components and their connecting joints can be exempted from measurement.
8.6 Sound level determination
According to GB/T7328.
8.7 Short-circuit withstand capacity test
8.7.1 The short-circuit withstand capacity test shall be carried out on the complete combined transformer, and the test method shall be in accordance with GB1094.5. Before the test, the fuse shall be short-circuited.
8.7.2 Under the specified installation and use conditions, the high and low voltage main circuits (including load switches) shall be tested for the specified rated short-time and peak withstand current capacity respectively. The test methods shall be in accordance with GB3804 and GB7251.1 respectively. Note: The current applied during the test shall be in accordance with the provisions of the corresponding technical conditions. 8.8 Rated short-circuit closing capacity test and rated breaking capacity test of high-voltage load switch The high-voltage load switch of the combined transformer shall be tested for rated short-circuit closing capacity and rated breaking capacity under normal installation conditions. The test method shall be in accordance with GB3804. Note: If the finalized product is selected and the original installation conditions are not changed, the test can be exempted. 8.9 Protection level test
The test shall be carried out on the assembled combined transformer sample. The test method shall be in accordance with GB4208. Note: For outdoor combined transformers, when the anti-water test is required, the water-proof test in the shell protection level test can be exempted. 8.10 Anti-water test
Anti-water test shall be carried out on the assembled outdoor combined transformer. The test method shall be in accordance with Appendix C of GB/TI1022-1999.
9 Inspection rules
The combined transformer product test is divided into routine test, type test and special test. 9.1 Routine test
Routine test items include:
a) General inspection (according to 8.1);
JB/T102172000
b) Power-on operation test of low-voltage electrical components (according to GB7251.1);c) Mechanical operation test (according to 8.2.1);
d) Oil tank sealing test (according to 8.4.2);
e) DC resistance unbalance rate measurement (according to GB/T6451): f) Measurement of electric ratio and verification of connection group number (according to GB1094.1): g) Measurement of short-circuit impedance and load loss (according to GB1094.1); h) Measurement of no-load current and no-load loss (according to GB1094.1); i) Measurement of insulation resistance to ground (according to GB/T6451): i) Routine insulation test (according to 8.3.1):
k) Insulating oil test (according to GB1094.1). 9.2 Type test
9.2.1 The transformer must be type tested in one of the following situations: a) New trial products or old products transferred to other factories: b) When the product changes its structure, raw materials or process methods, which may affect the product performance: ) When the factory inspection results are significantly different from the last type inspection. For enterprises that have not obtained ISO9001 quality certification, their products shall be regularly type tested at least once every five years. 9.2.2 Type test items include:
a) Temperature rise test (according to 8.5);
b) Mechanical life test (according to 8.2.2);
c) Oil tank mechanical strength test (according to 8.4.1);
d) Lightning impulse test (according to 8.3.2)
e) Rated short-circuit closing capacity test and rated breaking capacity test of high-voltage load switch (according to 8.8); f) Rated short-time and peak withstand current capacity test (according to 8.7.2) Note, 1) When the combined transformer needs to be sent for short-circuit withstand capacity test, the ability of the low-voltage circuit to withstand short-time current is also assessed, and the low-voltage main circuit test may not be repeated.
2) For terminal type combined transformers, the high-voltage main circuit test may be exempted. For ring network type combined transformers: during the test, the load switch should be in the ring network power supply and the transformer should be de-energized.
g) Anti-suppression level test (according to 8.9).
9.3 Special tests
Special test items include:
a) Sound level measurement (according to 8.6);
b) Short circuit withstand test (according to 8.7.1);c) Three-phase transformer zero sequence impedance measurement (according to GB1094.1);d) No-load current harmonic measurement (according to GB1094.1);e) Rainproof test (according to 8.10).
10 Marking, lifting, packaging, transportation and storage JB/T102172000
10.1 Combined transformers should be equipped with nameplates. The nameplates should be made of corrosion-resistant materials and should be fixed in a clearly visible position. The nameplate shall be clear, durable, and easy to read, and shall indicate the following items: a) Product name and model:
b) Code of this standard;
c) Name of the manufacturing unit;
d) Factory serial number and year and month of manufacture;
e) Number of phases:
f) Rated capacity of transformer, kVA:
Rated voltage (V or kY) and tapping range of each winding;
h) Rated current of each winding, A or kA;
i) Rated frequency, Hz:
) Connection group number:
k) Actual measured value of short-circuit impedance expressed as a percentage; 1) Oil weight, body weight, total weight, (
In addition to the main nameplate marked with the above items, the combined transformer shall also be equipped with a nameplate marked with the performance of high and low voltage electrical components, in accordance with GB/T 11022 and GB 7251.1. 10.2 Combined transformers should have safety signs in obvious locations on the box. 10.3 Combined transformers must have a lifting device that can bear the total weight. 10.4 The internal structure of the product should remain in the same position after normal railway, road and water transportation, and the fasteners should not be loose. 10.5 During overall transportation, all parts of the combined transformer should be protected from damage and moisture. 10.6 When the product is transported in packaging, the outside of the packaging box should have signs and symbols such as "Handle with care" and "Do not invert" and should comply with the provisions of GB191. The packaging box should be accompanied by a product quality certificate, installation and operating instructions, packing list, and a list of spare parts and accessories. 10.7 The product should be stored in a ventilated and dry place and should not be corroded by harmful gases. 10
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.