JB/T 6507-1992 Technical requirements for small three-phase asynchronous hydro-generator series
Some standard content:
Mechanical Industry Standard of the People's Republic of China
Small Three-phase Asynchronous Hydro-turbine Generator Series
Technical Conditions
Subject Content and Scope of Application
JB/T650792
This standard specifies the type, basic parameters, inspection rules, test items, marking and packaging of the YSFW small three-phase asynchronous hydro-turbine generator series.
This standard applies to the YSFW small (40kW to 500kW) three-phase asynchronous hydro-turbine generator series (hereinafter referred to as generators) directly or indirectly connected to the turbine.
This standard generator is suitable for hydropower stations that are connected to the power grid or in parallel with synchronous generators of sufficient capacity. 2 Reference standards
Packaging, storage and transportation diagrams
Basic technical requirements for rotating electrical machines
Motor structure and installation type code
GB1993 Motor cooling method
GB4942.1 Motor housing protection grade
GB10069.1~10069.3 Rotating electrical machine noise measurement method and limit GB10068.1 Rotating electrical machine vibration measurement method and limit JB/Z294 AC low voltage motor loose embedded winding turn-to-turn insulation test method 3 Types and basic parameters
The generator rating is a continuous rating based on the continuous duty system (S1). 3.2 The power levels of this series of generators are: 40, 55, 75, 100, 125, 160, 200, 250, 315, 400, 500kW, 3.3 The corresponding relationship between the synchronous speed of the generator and the rated power and the outer diameter of the stator core shall be in accordance with the provisions of Table 1. Table 1
Synchronous speed
Outer diameter of stator core
Approved by the Ministry of Machinery and Electronics Industry on December 21, 1992 1000
Implementation on May 1, 1993
Outer diameter of stator core
The structure and installation type of the generator is IMB3. 3.4
3.5 The cooling method of the generator is IC01.
The protection grade of the generator housing is IP23. 3.6
JB/T650792
Continued Table 1
Synchronous speed
The generator is three-phase, rated frequency 50Hz, rated voltage 400V, cage rotor, and the stator winding adopts star connection. 3.7
The rated power factor of the generator shall comply with the provisions of Table 2. Table 2
Synchronous speed
Rated power of generator
The method for compiling the model of the generator is as follows: 484
Rated power factor (leading)
Model example:
-XX/XXX
JB/T6507-92
Outer diameter of the stator core of the generator, in mm, indicates the number of poles of the generator, and the rated power of the generator, in kW, indicates the horizontal asynchronous hydro-turbine generator, and indicates the horizontal asynchronous hydro-turbine generator with Chinese phonetic letters YSFW160--6/650 indicates the horizontal asynchronous hydro-turbine generator, 160kW, 6 poles, and the outer diameter of the stator core is 650mm. 3.10 The corresponding relationship between the outer diameter and the center height of the generator stator core is manufactured according to Table 3. Table 3
Outer diameter of the stator core
Center height
4 Technical requirements
4.1 The manufacture of the generator shall comply with the requirements of this standard. 4.2 The generator should be able to operate continuously at rated value under the following conditions: a.
The altitude should not exceed 1000m;
The cooling air temperature should not exceed 40C;
Installed in a sheltered factory building.
If the conditions of use of the generator differ from the above conditions, it should be corrected according to the provisions of GB755. If the user needs to manufacture a humid tropical type, its environmental conditions should comply with the relevant standards. 4.3 Under the following conditions, the generator should be able to output rated power: a.
At rated frequency, the deviation between the voltage and the rated value does not exceed ±5%; at rated voltage, the deviation between the rated frequency and the rated value does not exceed ±1%; 740
When the voltage and frequency deviate at the same time (the deviations of the two do not exceed ±5% and ±1% respectively) and both are positive deviations, the sum of the deviations of the two does not exceed 6%; if the voltage and frequency are not positive deviations at the same time, the sum of the absolute values of the percentages of the two deviations does not exceed 5%. 4.4 When the generator is working at rated frequency and the deviation of voltage from rated value exceeds 105%, it should be able to operate continuously. At this time, the output power is limited to stator current not exceeding 105% of rated value. When the generator is working at rated frequency and the deviation of voltage from rated value exceeds 105%, the output power of the generator should be reduced. See Figure 1. 4.5 The generator and the auxiliary motor connected to it should be able to operate at a runaway speed of 2.4 times the rated speed for 2 minutes without harmful deformation. For those with special requirements, they should be specified in the special technical conditions. The generator should be able to withstand an occasional overcurrent of 150% rated current in a hot state for not less than 30 seconds without harmful deformation. 4.72 The stator winding of the generator should be able to withstand the insulation dielectric strength test of 50Hz AC voltage effective value 1000V 102 times rated voltage (waveform is actual sine shape) for 1 minute without insulation breakdown. 4.9 The insulation resistance of the generator stator winding should not be less than 0.5M when tested in hot state or immediately after the temperature rise test. 4.10 The generator should be able to withstand a test voltage of 130% of the rated voltage for 3 minutes (for multi-turn coils) when it is unloaded, without inter-turn breakdown. When the voltage value is increased to 130% of the rated voltage, it is allowed to increase the frequency or speed at the same time, but it should not exceed 150% of the rated value. When the no-load current exceeds the rated current at 130% of the rated voltage, the test time can be shortened to 1 minute. 4.11 The generator stator winding should be able to withstand the inter-turn insulation impulse withstand voltage test without breakdown. The peak value of the impulse test voltage is 2500V, and the test method is in accordance with JB/Z294.
JB/T650792
100105%5/Um
P/Ps-Generator power ratio
U/U-Generator voltage ratio
4.12 The difference between any two phases of the DC resistance of the generator stator winding in the actual cold state shall not exceed 2% of its minimum value. 4.13 When the three-phase power supply is balanced, the deviation of any phase of the three-phase no-load current of the generator from the three-phase average value shall not exceed 10% of the three-phase average value.
4.14 When the generator is running on an asymmetric system, if any phase of the stator current does not exceed the rated value and the ratio of the negative sequence component to the rated current does not exceed 12%, it should be able to work for a long time.
4.15 The rotation direction of the generator is specified as clockwise when viewed from the non-drive end. If there are special requirements, they should be specified in the special technical conditions. 4.16 The generator stator winding adopts Class B insulation. When the altitude does not exceed 1000m and the ambient temperature does not exceed 40C, the allowable value of the generator temperature rise is shown in Table 4, and the allowable temperature of the rolling bearing is 95C (thermometer method). Table 4
Generator winding
4.17 When the generator is running at rated conditions, its efficiency guarantee value shall comply with the provisions of Table 5, and its tolerance is the indirect method: 40kW generator-0.15(1-n) 55kW and above generator-0.10(1-n). Direct method: -0.15(1-7）
Synchronous speed
Generator rated power
Resistance method
Thermometer method
Generator rated power
JB/T6507-92
Continued Table 5
Synchronous speed
The unevenness of the generator air gap shall not exceed the provisions of Table 6: Table 6
In Table 6: g-
Air nominal value:
Unevenness value, which is defined as:
gi+g+gi-gig2g2g3-g3g
Where: g1>g2, g: is the air gap value measured at 120° apart 4.19
The noise limit of the A-weighted sound power level measured when the generator is running at no-load steady state shall not exceed the provisions of Table 7. Table 7
Step speed
Rated power
75, 100
125, 160, 200
250, 315, 400, 500
The effective value of the vibration velocity measured by the generator when it is running at no load shall not exceed the provisions of Table 8. 750
Special equipment for non-industry
JB/T6507
Synchronous speed
750.1 000.1 500
600.750, 1 000
Effective value of vibration velocity
Under rated voltage, the guaranteed value of the ratio of the maximum torque of the generator to the rated torque shall not be less than 1.8. Technical documents provided to users with the generator Generator appearance and installation dimensions drawing;
Operation and maintenance instructions;
Factory certificate:
Packing list.
4.23 Warranty period
Motor installation method
If the user uses and stores the equipment correctly according to the manufacturer's operation and maintenance instructions, the manufacturer's warranty for the equipment is one year after operation, but within two years from the date of shipment from the manufacturer, if the generator is damaged or cannot work normally due to poor manufacturing quality, the manufacturer shall repair or replace parts or motors for the user free of charge. 5 Inspection rules and test items
The generator must pass the inspection before it can leave the factory, and it should be accompanied by a product certificate. Users can inspect whether the quality of the product meets the requirements according to the provisions of this technical condition.
Each generator shall be subject to inspection and test. The inspection and test items include: 5.2
Mechanical inspection (according to the provisions of Article 5.5 of this standard); measurement of the DC resistance of the generator stator winding in the actual cold state; measurement of the insulation resistance of the generator stator winding to the casing and between the stator windings; generator withstand voltage test;
generator interturn impulse withstand voltage test (according to the provisions of Article 4.11 of this standard); generator short-time voltage increase test;
generator phase sequence inspection;
generator no-load test;
generator short-circuit test;
generator perturbation measurement (according to the provisions of Article 4.20 of this standard). Type tests shall be conducted in any of the following cases; 5.3
When trial production of new products is completed;
When important changes in design, structure, process or materials used are sufficient to cause changes in certain characteristics and parameters, and when the inspection test results deviate unacceptably from the previous type test results; Generators produced in batches shall be regularly sampled, and the sampling time shall be once a year. 5.4 Generator type test items:
All items of inspection test;
Temperature rise test and measurement of hot insulation resistance; Generator load characteristic test;
Measurement of generator efficiency;
Generator accidental overcurrent test:
Measurement of maximum torque of generator;
JB/T6507-92
Measurement of generator noise (according to the provisions of Article 4.19 of this standard); Generator overspeed test.
5.5 Mechanical inspection items of generators include: a.
Appearance inspection: Check whether the assembly of the generator is complete and correct. The paint on the surface of the generator should be dry, complete, uniform, and free of stains, damage, cracks, etc.
Rotation inspection: When the generator rotates, it should be stable and brisk, without stagnation, and the sound should not contain harmful noises. b.
5.6 Article 5.5 of this standard must be inspected for each unit, Article 5.2j can be inspected randomly, and the inspection method is determined by the manufacturer. Article 5.2e and f are the two inspection tests, with item e as the main one, but any one of them can be selected for the test. The air gap unevenness inspection can be carried out when the product structure is finalized or when there are major changes in the structure and process.
5.7 The test methods of various tests specified in this standard shall be carried out in accordance with the test outline of YSFW small three-phase asynchronous hydro-turbine generator. The determination method of generator noise shall be in accordance with GB10069.1~10069.2, the determination method of generator vibration shall be in accordance with GB10068.1, and the generator turn-to-turn impulse withstand voltage test method shall be in accordance with JB/Z294. 6 Marking and packaging
6.1 The nameplate material and the engraving method of the data on the nameplate shall ensure that the writing is not easily erased during the use of the generator, and shall be firmly fixed in an appropriate and obvious position.
The items that should be marked on the generator nameplate are as follows: a.
Motor name;
Manufacturer name;
Manufacturer product number;
Motor model;
Rated power, kw;
Rated voltage, V;
Rated current, A;
Rated frequency, Hz;
Rated speed, r/min;
Number of phases;
Stator winding connection method;
Rated power factor, cost;
Insulation level:
Runaway speed, r/min,
Weight, kg.
Year and month of production;
Standard number.
6.3 The six outlet terminals of the generator stator winding and the wiring position on the terminal board should be marked accordingly, and the markings should be indelible during the entire service life of the generator. The markings shall be in accordance with the provisions of Table 8. Table 8
Name of generator stator winding
First phase
Second phase
Third phase
JB/T6507-92
The manufacturer shall be responsible for the packaging of the generator, and the quality assurance period shall be three months from the date of leaving the factory. 6.4
The generator packaging box should be firm and reliable, and the words and signs on the outer wall should be clear and neat, with the following contents: Shipping station and manufacturer;
Name of the receiving station and receiving unit:
Name of goods;
Generator factory number;
Net weight and gross weight:
Box dimensions;
Graphics in accordance with GB191 should be marked at appropriate locations outside the box. Additional notes:
This standard was proposed by Tianjin Electric Drive Design Institute. This standard was drafted by Tianjin Electric Drive Design Institute. The main drafters of this standard are Yang Xinwei and Liu Xingmin. 4901The nameplate material and the engraving method of the data on the nameplate should ensure that the writing is not easily erased during the use of the generator, and should be firmly fixed in an appropriate and obvious position.
The items that should be marked on the generator nameplate are as follows: a.
Motor name;
Manufacturer name;
Manufacturer production number;
Motor model;
Rated power, kw;
Rated voltage, V;
Rated current, A;
Rated frequency, Hz;
Rated speed, r/min;
Number of phases;
Stator winding connection method;
Rated power factor, cost;
Insulation level:
Runaway speed, r/min,
Weight, kg.
Year and month of production; bzxZ.net
Standard number.
6.3 The six outlet terminals of the generator stator winding and the wiring position on the terminal board should be marked accordingly, and the markings should be indelible during the entire service life of the generator. The markings shall be in accordance with the provisions of Table 8. Table 8
Name of generator stator winding
First phase
Second phase
Third phase
JB/T6507-92
The manufacturer shall be responsible for the packaging of the generator, and the quality assurance period shall be three months from the date of leaving the factory. 6.4
The generator packaging box should be firm and reliable, and the words and signs on the outer wall should be clear and neat, with the following contents: Shipping station and manufacturer;
Name of the receiving station and receiving unit:
Name of goods;
Generator factory number;
Net weight and gross weight:
Box dimensions;
Graphics in accordance with GB191 should be marked at appropriate locations outside the box. Additional notes:
This standard was proposed by Tianjin Electric Drive Design Institute. This standard was drafted by Tianjin Electric Drive Design Institute. The main drafters of this standard are Yang Xinwei and Liu Xingmin. 4901The nameplate material and the engraving method of the data on the nameplate should ensure that the writing is not easily erased during the use of the generator, and should be firmly fixed in an appropriate and obvious position.
The items that should be marked on the generator nameplate are as follows: a.
Motor name;
Manufacturer name;
Manufacturer production number;
Motor model;
Rated power, kw;
Rated voltage, V;
Rated current, A;
Rated frequency, Hz;
Rated speed, r/min;
Number of phases;
Stator winding connection method;
Rated power factor, cost;
Insulation level:
Runaway speed, r/min,
Weight, kg.
Year and month of production;
Standard number.
6.3 The six outlet terminals of the generator stator winding and the wiring position on the terminal board should be marked accordingly, and the markings should be indelible during the entire service life of the generator. The markings shall be in accordance with the provisions of Table 8. Table 8
Name of generator stator winding
First phase
Second phase
Third phase
JB/T6507-92
The manufacturer shall be responsible for the packaging of the generator, and the quality assurance period shall be three months from the date of leaving the factory. 6.4
The generator packaging box should be firm and reliable, and the words and signs on the outer wall should be clear and neat, with the following contents: Shipping station and manufacturer;
Name of the receiving station and receiving unit:
Name of goods;
Generator factory number;
Net weight and gross weight:
Box dimensions;
Graphics in accordance with GB191 should be marked at appropriate locations outside the box. Additional notes:
This standard was proposed by Tianjin Electric Drive Design Institute. This standard was drafted by Tianjin Electric Drive Design Institute. The main drafters of this standard are Yang Xinwei and Liu Xingmin. 490
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