JB/T 10318-2002 Technical parameters and requirements for oil-immersed amorphous alloy core distribution transformers
Some standard content:
ICS29.180
2002-07-16
JB/T103182002
2002-12-01
JB/T10318—2002
is the standard oil type This standard is specially formulated for the performance parameters and technical requirements of amorphous alloy core distribution transformers. This standard is formulated based on the current technical level of oil-immersed amorphous alloy core transformers in the domestic transformer industry: This standard needs to be used in conjunction with GB1094.1, GB1094.2, (FB1094.3 and GB1094.5 ) The writing format of this standard is in accordance with GB/T1.1-2000 "Standardization T Work Guidelines Part 1: Standard Structure and Writing Rules". This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Transformer Standard Promotion Technical Committee. This standard was drafted by: Shenyang Transformer Research Institute, Wuhan High Voltage Research Institute, Shanghai Zhixin Electric Co., Ltd., Dongguan Transformer Guang, Wujiang Transformer Factory.
The main drafters of this standard: Han Qingheng, Ren Xiaohong, Lin Canhua, Hu Xiongwen, Wang Wenguang, 1 scope
JB/T1031B—2002
Oil-immersed amorphous alloy core distribution transformer technology Parameters and Requirements This standard specifies the terms and definitions, performance parameters, technical requirements, test items, marking, lifting, installation, transportation and storage of oil-immersed amorphous alloy core distribution transformers. This standard is applicable to the dry voltage level V10k. Single-phase oil-immersed non-grade alloy core distribution transformer (hereinafter referred to as "single-phase transformer") with a rated energy frequency of 50Hz and a rated capacity of 5kVA~[60kYA and a three-phase oil-immersed amorphous transformer with a rated capacity of 30kVA~2500kVA Alloy core distribution transformer (hereinafter referred to as "three-phase transformer") 2 Normative reference documents
The clauses in the following documents become the clauses of this standard through reference in this standard. For dated referenced documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. . For undated referenced documents, the latest version applies to this standard. GB1094.1-1996 Power transformers Part 1 General principles (egYEC60076-1:1993) GB1094.2-1996 Power transformers Part 2 Temperature rise (v[EC 60076-2:1993) GB1094.3 Power transformers Part 3 Part: Insulation level, insulation test and external insulation air gap GB1094,5 Power transformer Part 5 Ability to withstand short circuit GB/T2900.15-1997 Electrical terminology transformers, transformers, voltage regulators and reactors (negEC60050-421:1990 ; TFC 60050-321: 1986)
3 Terms and Definitions
The terms and definitions established in GB1094.1 and GBT2900.15 and the following terms and definitions shall apply to this standard. 3.1
Amorphous alloy
An alloy that uses iron and isobaric as raw materials, and uses special processes such as rapid cooling to make the atomic arrangement of the material appear disordered. 3.2
Amorphous alloy core
A core made of amorphous alloy strip with soft magnetic properties. 3.3
Amorphous alloy core distribution transformer
A distribution transformer whose amorphous gold-containing core is made of magnetically permeable material. Performance parameters
The rated capacity, voltage combination, connection group label and performance parameters of single-phase transformers should comply with the provisions of Table 1. Single-phase transformer performance parameters
Voltage combination and tap range
Rated capacity
High voltage tap
2 × (0,22 ~-0.24)||tt| |Connection group
Air interception consumption
Load consumption
No-load current
Short circuit impedance
JB/T 103182002
Rated Capacity
Voltage combination and tap range
High voltage tap
1(continued)
Connection group
2 ×(0.22 -0.24)|| tt | Performance parameters are determined by the manufacturer and the user through consultation. Note 2: For transformers with a low voltage of 2×(0.22--0.24) kV combination, when the low voltage is (0.22~0.24) kV, the capacity is halved (except when used in parallel) Note 3: For other short-circuit isolation values, It is determined by the user and the manufacturer through consultation: 4.2
rated capacity,
voltage combination, connection group label and performance parameters of the three-phase transformer should comply with the provisions of Table 2. Table 2 Three-phase transformer performance parameters | |tt||Voltage combination and tapping installation
Rated inspection
High voltage tapping
Connection group
Dyn H1
Note: When the core When it is three-phase and three-column, Yymo coupling group can also be used as needed. 5 Technical requirements
Basic requirements
Negative cutting loss
Negative cutting loss
No-load current
Transformers manufactured according to this standard shall comply with GB 1094.1, The provisions of GB1094.2, GB1094.3 and GB1094.5. 5.2 Safety protection device
Short-circuit positive resistance
For transformers of 800kVA and above, a gas relay should be installed, and its contact capacity should not be less than 66VA (AC 220V or 110V). When there is a true current inductive load , should be no less than 15W. 2
JB/T10318—2002
When the amount of gas accumulated in the gas relay reaches 2S (mL ~ 300mL or the oil speed is within the setting range, the corresponding contacts should be connected respectively. Gas relay The installation location and its structure should be able to observe the amount and color of the decomposed gas, and it should be convenient to take the gas. According to the negotiation between the user department and the manufacturer, gas relays can also be provided for transformers below 800kVA. Transformers 800kVA and above should be equipped with pressure. Release valve and quick-acting hydraulic relay. Note: For sealed transformers, the use range of JK force release valve and linked sleeve pressure relay can be appropriately expanded. When the pressure in the transformer tank reaches the safe limit, the pressure relief valve should be used. Reliably release pressure. When the pressure rise rate in the transformer tank threatens the safety of the tank, the quick-acting oil pressure relay should be able to stop the transformer from operating.
5.3.1 All three-phase transformers should be equipped with it. The structure of the oil conservator (except for sealed transformers) should be convenient for cleaning the inside. One end of the oil storage tank should be equipped with an oil level gauge. Its volume should ensure that the oil does not overflow under the maximum ambient temperature and allowable load conditions. When the transformer is not in operation, the oil level gauge should be observed to indicate the oil level. For blue-phase transformers of 100VA and above (except for products with nitrogen charging protection), a moisture absorber with a flush seal should be installed on the oil conservator. 5.3.2 If the single-phase transformer is equipped with an oil conservator (except for sealed transformers), its structure is easy to clean inside. Users: There are no special requirements. The oil tank is generally not equipped with a single-phase seal.
Type transformers (corrugated oil tanks, transformers with expansion radiators or transformers with an air gap on the upper part of the tank), if the user has no special requirements, generally do not install an oil level gauge. However, for transformers with air gaps, an oil level gauge should be installed on the inner wall of the oil tank. A single-phase transformer with a mark that can accurately indicate the oil level position at 25°C is generally not equipped with a pressure relief valve. However, for transformers with larger rated capacity, it can also be installed according to user needs. 5.3.3 The oil storage valve should be filled with oil. Oil and drain oil devices. 5.4 Oil temperature installation
Both single and three-phase transformers should have a common seat for a glass thermometer. The tube seat should be located at the upper part of the oil tank and should be 120mr deep into the oil. tt||Transformers of 1000kVA and above must be equipped with outdoor signal thermometers. When the AC voltage is 220V, the signal contact capacity shall not be less than 10 5 UVA. When there is a DC inductive load, the accuracy level of the thermometer shall meet the corresponding requirements. Standard. The installation position of the signal thermometer should be easy to observe. 5.5 Technical requirements for transformer tanks and accessories 5.5.1 Single-phase and three-phase transformers are generally not supplied with trolleys. If there is a bracket welded to the bottom of the tank, the welding position should comply with the requirements of Figure 1. , Note: Carts can also be supplied according to user needs, sticky book
Note: C size can be connected to the transformer size selection of 200mm, 300mm, 400mm, 550mm, 660mm, 820mm, 1070mm Figure 1 Welding position of the box bottom bracket (long axis Direction) 5.5.2 An oil sample valve should be installed on the lower wall of the oil tank. The bottom of the transformer tank of 315kVA and above should be equipped with an oil drain device. 5.5.The temperature rise of the connection point of the three sets of wiring terminals in the ambient air is not more than 55K, and the temperature rise of the oil in the oil is not more than 15K.
JB/T10318—2002
5.5.4 The diameter of the oil tank opening of the single-phase transformer installation bushing shall comply with the provisions of Table 3. The diameter of the oil tank opening of the three-phase transformer installation bushing shall comply with the provisions of Table 4.
Table 3 Diameter of oil tank opening for single-phase transformer bushing installation Unit: mm
Without air gap
With air gap
Table 4 Diameter of oil tank opening for three-phase transformer bushing installation Electric range
6~-10
300A and below
400A ~ 600A
800A --1200A
5.5.5 Off-excitation tapping and closing should be positioned, and the opening diameter is 37mm or 43tmm5.5.6 The core and larger metal structural parts of single-phase and three-phase transformers should be reliably grounded through the oil tank. 5.5.7 The lower part of the oil tank of single-phase and three-phase transformers should be equipped with a sufficiently large oil drain. 5.5.8 The components of single-phase and three-phase transformers should comply with the corresponding standards. 6 Test items
Unit, mm
2000--3000A
In addition to the test items specified in GB 1094.1, GB[094.2, GB1094.3 and GB1094.5: it shall also comply with the following provisions. 6.1 The DC resistance of the winding of single-phase and three-phase transformers shall meet the design requirements and provide the measured values. For three-phase transformers, the DC resistance unbalance rate is: 4% between phases and 2% between lines. If the DC resistance unbalance rate exceeds the above value due to reasons such as wire material and wire structure, in addition to recording the measured value in the factory test record, the cause of this deviation shall also be stated. The unit used shall be compared with the factory measured value at the same temperature, and the deviation shall not exceed 2%. Note 1: The DC unbalance rate shall be calculated with the maximum value of the three-phase measured value minus the minimum value as the numerator and the average value of the three-phase measured value as the denominator. Note 2: The resistance values between all corresponding terminals shall be measured and compared. 6.2 Provide the measured value of the transformer insulation resistance. The test is usually carried out at 10℃～40℃ and relative humidity less than 85%. When the measured temperature is different, the insulation resistance can be converted as follows: Rz=Rx1.5g-10
R}R2—Insulation resistance value at temperature t,
6.3 The transformer needs to be sealed and there should be no leakage and damage after 12 hours. The test pressure is as follows: "General structural oil tanks should withstand a pressure of 40kPa. a) wwW.bzxz.Net
Corrugated oil tanks and expansion radiator tanks: For transformers of 315kVA and below, they should withstand a pressure of 20kPa: For transformers of 400kVA b)
and above, they should withstand a pressure of 15kPa. The residual pressure shall not be less than 70% of the specified value. 6.4 Single-phase and three-phase transformer oil tanks and oil storage cabinets (if any) shall be subjected to strength (positive pressure) tests. After 5 minutes, there shall be no damage and no unacceptable permanent deformation. This test is a type test, and the test pressure is as follows! a) The general structural oil test pressure is 50kPa: JB/T 10318—2002
Corrugated oil tank and expansion radiator oil tank: 20kPa for transformers of 315kVA and below: 15kPa for transformers of 400kVA and above b)
.
7 Marking, lifting, installation, transportation and storage 7.1 The high and low voltage bushing terminals of single and three-phase transformers should have corresponding markings. 7.2 For single-phase transformers with a low voltage of 2×【0.220.24）V, the internal wiring diagram of the low voltage winding should be indicated on the chrome plate. 7.3 The arrangement order of the high and low voltage bushings of single-phase transformers from left to right is A, X: a, X (if any), x (facing the high voltage side). The low voltage terminals of sealed single-phase transformers with air gaps should generally be led out from the box wall. 7.4 Bushing arrangement of three-phase transformers The order of the positions is generally shown in Figure 2. $ by
Figure 2 General arrangement of bushings of three-phase transformers 7.5 Single-phase and three-phase transformers must have a lifting device that can bear the total weight of the whole body. The transformer body, oil tank, detachable oil storage cabinet (if any), radiator, etc. should all have lifting devices. 7.6 The internal structure of single-phase and three-phase transformers should remain in the same position after being transported by railway, road and water, and the fasteners should not be loose. The structure and layout of the transformer components such as bushings, radiators (tubes), valves and oil storage cabinets (if any) should not hinder the lifting, transportation and fastening during transportation. 7.7 When transporting single-phase and three-phase transformers as a whole, all transformer components such as oil storage cabinets (if any), bushings, valves and radiators (tubes) should be protected from damage and moisture.6 The internal structure of single-phase and three-phase transformers should remain unchanged after being transported by rail, road and water, and the fasteners should not be loose. The structure and layout of the transformer groups and components such as bushings, radiators (tubes), valves and oil storage cabinets (if any) should not hinder the lifting, transportation and fastening during transportation. 7.7 When transporting single-phase and three-phase transformers as a whole, all transformer groups and components such as oil storage cabinets (if any), bushings, valves and radiators (tubes) should be protected from damage and moisture.6 The internal structure of single-phase and three-phase transformers should remain unchanged after being transported by rail, road and water, and the fasteners should not be loose. The structure and layout of the transformer groups and components such as bushings, radiators (tubes), valves and oil storage cabinets (if any) should not hinder the lifting, transportation and fastening during transportation. 7.7 When transporting single-phase and three-phase transformers as a whole, all transformer groups and components such as oil storage cabinets (if any), bushings, valves and radiators (tubes) should be protected from damage and moisture.
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.