JB/T 3320.2-2000 Technical requirements for small single-phase synchronous generators
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T3320.2
2000-04-24
2000-10-01 Small
Wa Xian Ji Dong
JB/T3320.22000
This standard is based on GB/T1 and GB/T755-2000 "Rotating electrical machines - Ratings and energy (idtIEC60034-1 (1996)) and IE60031-22 (1996) "Alternating current generators driven by reciprocating internal combustion engines\Technical conditions for JR3335-1983 small single-phase synchronous generators" and revised to make it as consistent with international standards as possible in terms of technical content. This standard consists of the following two parts: 1. JB/3320.1-2000 Technical Conditions for Small Brushless Three-phase Synchronous Generators; 2. JB/T3320.2-2000 Technical Conditions for Small Single-speed Synchronous Generators. Appendix 1 of this standard is the standard appendix, and Appendix B is the indicative appendix. From the date of implementation, this standard will replace JB3335-1983. This standard was proposed by the National Technical Committee for Standardization of Rotating Electric Machines. This standard was drafted by Shanghai Electric Science Research Institute. The main drafters of this standard are: Ni Wenyi. JB/T3320.2-2000 JB3335-1983 This standard specifies the requirements for small single-speed synchronous generators driven by dual-engine internal combustion engines. The type, basic parameters and dimensions, technical requirements, inspection rules and test methods, as well as marking, packaging and quality assurance period of generators (hereinafter referred to as generators). This standard applies to small single-phase synchronous generators with a rated frequency of 50Hz driven by reciprocating internal combustion engines. If there are additional requirements for each series of generators that are not specified in this standard, or if there are special requirements on certain clauses of this standard, supplementary provisions should be made in the enterprise standard.
2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, 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. GB191—1990
GB755—2009
GB/T 997—1981
CB/T 1993—1993
GB/T 4772.1—1999
GH 4824—1996
GB/T 4942. 1—1985
GB 10068—2000
GB 10069—1988
GB 12351—1990
GB/T 12665—-1990
GB/T14048.1—1993
GB/T 14481—1993
GB 14711-1993
JB/T5810—1991
JB/T 9615.1—2000
JR/T 9615.2—2000
Packing and transportation pictorial mark
Rotating electrical machines—Ratings and performance (id1EC60034—1:1996) Motor structure and installation type code (eqv[FC60031—7:1972) Rotating electrical machine cooling method (egvIEC60034—6:1991) Rotating electrical machine size and output power level (idtIEC60072—1:1991) Measurement methods and limits of electromagnetic disturbance of industrial, scientific and medical (ISM) radio frequency equipment (neqCISPR1l:1990)
Motor housing protection classification (ecIEC60034—5:1981) Mechanical vibration of motors with a shaft center height of 56 or more Vibration measurement, evaluation and limits (idtIEC60034—14:1996) Rotating electrical machine noise Determination methods and limits (neqIEc60034-9:1972) Technical requirements for tropical type rotating electrical machines
Wet and hot test requirements for motors under normal environmental conditionsGeneral rules for low-voltage switchgear and control equipment
Test methods for single-phase synchronous motors
Safety requirements for small and medium-sized rotating electrical machines
Test specifications for insulation between turns of motor pole coils and field windingsTest methods for insulation between loosely embedded windings of AC low-voltage motorsTest limits for insulation between loosely embedded windings of AC low-voltage motors2000-04-24
2000-10-01Small cable
3 Types, basic parameters and dimensions
JB/T3320.22000
3.1 The enclosure protection levels of the generator are IP11, IP21, and IP22 (see GR/T4942.1). 3.2 The cooling method of the generator is IC01 (see GB/T1993). 3.3 The structure and installation type of the generator are IMB3 or TMB34 (see GB/T997). 3.4 The rating of the generator is a continuous rating based on the continuous working system (S1). 3.5 The rated frequency of the generator is 50Hz and the rated voltage is 230V. 3.6 The rated power factor (cosΦ) of the generator is 0.9 (lagging) or 1.0. Note: If a generator with a rated power factor UB (lagging) is required, it should be agreed upon separately by the user and the manufacturer. 3.7 The generator should be manufactured according to the following rated power (kVA): 1, 2, 3, 5, 7.5, 10, 12, 15 for a rated power factor of 1.0. 1.1, 2.2, 3.3, 5.6, 8.3, 11.1, 13.3, 16.7 for a rated power factor of 0.9 (lagging). The corresponding relationship between the frame number, speed and power of the generator should be in accordance with the provisions of Table 1. 3.8
Table 1 The corresponding relationship between the frame number, speed and power Frame number
Power kVA
Co p=1. 0
Cos P-0. 9(
The installation dimensions and tolerances of the generator shall comply with the provisions of Table 2. 2
The dimensions and tolerances of the generator shaft extension key shall comply with the provisions of Table 3. 112
Table 3 Dimensions and tolerances of the generator shaft extension key
Diameter
The radial runout at half the length of the generator shaft extension shall not be greater than that specified in Table 4. Table 4 Radial runout of the generator shaft extension
Diameter
Diameter runout limits
160L180S
3.12 Radial runout of flange: flange to shaft centerline and flange mounting face to shaft centerline end face The circular runout shall not exceed the requirements of Table 5. Table 5 Radial circular runout of the flange stop and the circular runout of the flange installation surface of the generator flange stop diameter
Diameter runout calibration end face limit due to runout
265 door
Machine frame
Final 11MB3
JB/T3320.22000
Table 2 Installation dimensions and tolerances of the generator
Figure 2TMB3
4—H12
—K1G
4 Technical requirements
JB/T3320.22000
4.1 The generator shall comply with this standard 4.2 The generator shall be capable of rated operation under the following altitude and ambient air temperature conditions. 4.2.1 The altitude shall not exceed 1000.
4.2.2 The maximum ambient air temperature varies with the seasons and shall not exceed 40°C. 4.2.3 The minimum ambient air temperature is -15°C. 4.2.4 The average maximum relative humidity in the wettest month at the operating location is 90%, and the average minimum temperature in that month is not higher than 25°C. Note
1 The generator is specified for use in cases where the altitude exceeds 100°C or the ambient air temperature is higher or lower than 40°C. 2 If the generator is specified to be used in an ambient air temperature below -15 or other special environment, the user and the manufacturer shall agree separately. 4.3 The generator can be made into a humid tropical type as required. In addition to meeting the requirements of this standard, this type of generator shall also meet the requirements of GB12351.
The voltage and frequency changes during the operation of the generator shall comply with the provisions of GB755. 4.4
4.5 When the generator is running at a fixed frequency, the guaranteed value of its efficiency () shall comply with the provisions of Table 6. The tolerance of efficiency is -0.15 (1-7). Table 6 Efficiency index of the generator
Cns Φ=1. 1
Cos d-0. 9
(游庄)
Power kYA
Efficiency %
Power KYA
Note: The efficiency is determined by the direct method (the temperature of the cold air should be converted to 25℃). 3
4.6 The steady-state voltage regulation rate of the generator (6.) is divided into five categories. The limit values of each category shall comply with the provisions of Table 7. However, Category V should be avoided as much as possible.
Limit value of steady-state medium voltage regulation rate
Steady-state output regulation rate category
Standard voltage regulation%
For all loads from no-load to rated load, the voltage of the generator should be able to be maintained within the range of (1±5stu)·%. The steady-state voltage regulation rate is calculated according to formula (1): Uax -Umin
Where: a. When the load changes between full load and no-load, the maximum and minimum values of the medium voltage (effective value) at the generator end, V,——the rated voltage of the generator, V.
The steady-state voltage regulation rate is determined under the following conditions: a) The load power is from no-load to rated load, and the power factor is the rated value; b) The steady-state speed regulation rate of the prime mover is specified as 5% (i.e. 105% rated speed at no-load and rated speed at full load). If the steady-state speed regulation rate of the prime mover is less than 5% and is otherwise specified: it shall be determined according to the specified steady-state speed regulation rate; c) The steady-state voltage regulation rate of the generator only tests the voltage regulation rate at rated voltage: d) The voltage change from cold to hot is not included in the assessment of &tu, and the voltage is allowed to be re-adjusted when assessing the hot voltage regulation rate. 4. The no-load set voltage of the generator is specified as follows according to the same excitation method. 4.7.1 For generators with controllable excitation method, the no-load output voltage setting range is 95%-~105% rated voltage. 4
JB/T3320.22000
4.7.2 For generators with uncontrolled excitation mode, the no-load voltage setting range is not specified. If the user has requirements, they can reach a separate agreement with the manufacturer.
4.8 The voltage change of the generator from cold state to hot state at rated power should not exceed ±2% of the rated voltage for generators with voltage regulation of Class I and Class II, not exceed ±5% of the rated voltage for generators with voltage regulation of Class III and Class IV, and not exceed ±7% of the rated voltage for generators with voltage regulation of Class V.
4.9 The sinusoidal variation rate of the voltage waveform of the generator shall not exceed the following values: 10% for rated power of 10 kVA and above
for rated power below 10 kVA
4.10 The winding of the generator adopts Class E or Class B insulation. When the sea and ambient air temperatures meet the requirements of Article 4.2, the leakage rise limit of the winding shall not exceed the provisions of Table 8. The bearing tolerance temperature (thermometer method) shall not exceed 95°C. The temperature of the collector ring, brush or brush mechanism shall not damage the insulation of itself or any adjacent parts. Table 8 Winding temperature rise limit
Motor windings
Each winding except item 2
Hidden pole rotor excitation winding
Maussaffar
If the altitude or ambient air temperature of the test site is different from that specified in Article 4.2, the temperature rise limit shall be modified according to the provisions of GB/T755. 4.11 When the generator is running at the specified minimum ambient air temperature, its voltage regulation rate shall comply with the provisions of Article 4.6, and there shall be no fracture of plastic parts, rubber parts and metal parts. 4.12 The generator shall be able to withstand 1.2 times the rated speed for 2in under no-load, and the rotor structure shall not be damaged or deformed harmfully. The generator shall only be subject to overspeed test when there is an agreement. 4.13 The insulation resistance of each winding of the generator in the hot state shall not be lower than the value obtained by formula (2). U
-Insulation resistance of winding, M2:
Where: —
li—Nominal voltage of winding, V.
Note: For humid tropical type power generation, the insulation resistance of each group shall comply with the relevant provisions of GB12351. (2)
4.14 Each winding of the generator shall be able to withstand a withstand voltage test for 1 minute without breakdown. The frequency of the test voltage is 5CHz and it shall be a sine wave as much as possible. The effective value of the voltage shall be in accordance with the provisions of Table 9. Table 9 Withstand voltage test
Motor part
Generator plate winding and auxiliary winding to the housing Generator armature winding to the auxiliary winding
Generator excitation winding and the part of the excitation device (or the AC exciter) connected to the excitation winding to the machine light and other windings
Part of the excitation device (or the magnetic field system of the AC exciter) that is opposite to the armature winding or auxiliary winding! Group> to the machine light and other windings
White electric switch regulator, semiconductor devices and capacitors are not subject to this test. 1
Ⅱ is Rated working voltage of each winding:
Test voltage (effective value)
[000+2Minimum 1500
[000+2UMinimum 1500
10 times rated excitation voltageMinimum 1500
1000+26Minimum 150
JB/T3320.22000
4.15 Generator windings shall be subjected to turn-to-turn insulation impulse withstand voltage test. For generators with loose-embedded windings, the peak voltage of the inter-turn insulation impulse test shall be in accordance with JB/T9615. 2: The voltage limit of the inter-turn insulation test of the generator field winding shall be in accordance with the provisions of JB/T5810. 4.16 The generator shall be able to withstand the sudden short-circuit mechanical strength test without damage and harmful deformation when self-excited, and after the test, it shall be able to withstand the medium voltage test specified in Article 4.11. Unless otherwise specified, the test shall be carried out at the rated voltage without load, and the short circuit shall last for 3S. The sudden short-circuit mechanical strength test shall only be carried out when the user clearly requires it when ordering. 4.17 The generator shall be able to withstand 150% of the rated current for 305 seconds without damage or harmful deformation when in the hot state. Damage and harmful deformation occur. At this time, the voltage should be as close to the rated value as possible.
4.18 After the temperature rise test, the generator should be able to overload 10% and run for 1 hour without damage and harmful deformation. 4.19 For generators with requirements for effective electromagnetic interference, the limit value should not be as specified in Table 10. Table 10 Limit value of strong electromagnetic interference
Electromagnetic interference
Radiated interference
Conducted interference
Frequency range IHz
30-230
230--1000
C. 15 ~-0. 5
30 dB (μV/m), measured at a distance of 30 3B (V/), measured at a distance of 30 79 dB (μ) Standard value
3H (estimated value
4.20 The effective value of the vibration velocity measured by the generator when it is no-load should not exceed the provisions of Table 11. Table 11 Vibration velocity effective value limit
Center brightness m
Vibration velocity effective value mn/s
66 () Average detection
60dB () Average value
For: For generators that cannot be operated as motors, it is allowed to ensure dynamic balance by adhesion calibration. The dynamic balance requirements shall comply with the provisions of Appendix A of this standard. The noise value of the A-weighted sound power level measured by the generator when it is no-load should not exceed the provisions of Table 12. 4.21
Table 12A Weighted Sound Power Noise Limits
Speed fimin
Power kVA
Mountain Power d (A)
4.22 The direction of rotation of the generator is clockwise from the transmission end, and it can also be made to rotate in both directions, 3000
4.23 The generator should have a reliable grounding device and be marked with the grounding symbol or graphic mark specified in G14711. The design of the grounding device should meet the requirements of GB/755. When grounding with bolts, the minimum diameter of the grounding bolts should meet the requirements of GB14711, and sufficient mechanical strength should be considered. The grounding bolts should be resistant to corrosion and be good conductors. If black metal is used, it should be electroplated or other effective measures should be taken to prevent corrosion.
4.24 The minimum value of the electrical clearance and creepage distance in the junction box shall comply with the provisions of CB14711. The measurement method and requirements shall comply with the provisions of GB/14048.1.
JB/T3320.22000
4.25 The various factors that may affect the torsional vibration of the auxiliary system after the generator and the internal combustion engine are combined shall be considered: When necessary, the generator manufacturer shall provide the internal combustion engine manufacturer with the parameters such as the generator rotor size and moment of inertia, which shall be calculated and determined by the internal combustion engine manufacturer. 5 Inspection rules and test methods
5.1 Each generator shall be inspected and qualified before it can be shipped to the factory, and a product inspection certificate shall be attached. 5.2 Each generator shall be inspected and tested. The inspection and test items include: 1) Machine inspection (according to the provisions of Articles 5.5 and 5.6 of this standard); 2) Determination of insulation resistance of each independent circuit to the casing and between them (the cold insulation resistance can be measured during the inspection test, but the hot insulation resistance should be no less than that of Article 4.13); : Measurement of DC resistance of winding under actual cooling state; d) Measurement of cold steady-state voltage regulation rate; e) Inspection of cold no-load voltage setting range; i) Overspeed test (inspection test is only carried out when specified in the agreement); g) Turn-to-turn impulse withstand voltage test; h) Withstand voltage test. 5.3 In any of the following cases, retrograde type test must be carried out: a) When trial production of new products is completed; b) When the design or process changes of the generator are sufficient to cause changes in certain characteristics and parameters; c) When the inspection test results and the previously conducted type test results have an unacceptable deviation; d) Periodic inspection of batch-produced generators, generally once every two years. Type test at least two units each time. If one item fails during the test, double the number of generators from the same batch should be drawn for retesting. If there is still any failure, the batch of generators must be tested for this item one by one. 54. The type test item H of the generator includes
H) All items of inspection test:
b) Determination of sinusoidal distortion rate of medium voltage waveform:
c) Temperature rise test and determination of hot insulation resistance d) Overload test; www.bzxz.net
e) Inspection of hot no-load voltage setting range:
f) Determination of hot and cold voltage changes:
g) Efficiency determination :
) Determination of noise:
i) Determination of vibration:
j) Determination of steady-state voltage regulation in hot state:k) Sudden short-circuit mechanical strength test (conducted when required by Kawato Tishan and when the trial production of new products is completed):1) Short-time overcurrent test:
m) Damp heat test:
JB/T3320.22000
nElectromagnetic interference measurement (only for generators with this requirement):0) Determination of no-load characteristics of the generator when separately excited:D) Determination of steady-state short-circuit characteristics of the generator when separately excited. Note: For brushless generators, the following items are to be checked when the trial production of new products is completed and when the design or process changes are sufficient to cause changes in its characteristics and parameters:
5.5 Mechanical inspection items for generators include
a) Bearing inspection: When the generator is running, the bearing should be smooth and light, without stagnation, and the sound should be uniform and harmonious without harmful noise: b) Appearance inspection: Whether the assembly of the generator is complete and correct, the paint on the surface of the generator should be dry and perfect, without stains, damage, cracks, etc.
Installation dimension, outer dimension and key dimension inspection: The installation dimension shall comply with the provisions of Article 3.9 of this standard, the key dimension shall comply with the provisions of Article 3.10 of this standard, and the outer dimension shall comply with the provisions of the drawing; d) Radial runout inspection: The radial runout shall comply with the provisions of Articles 3, 11 and 13.12 of this standard. 5.6 Items a and b of Article 5.5 of this standard shall be inspected for each unit, and items c and d of Article 5.5 may be inspected at random, with the number of inspections being 5 of each batch of production, not less than 2 units. If any unqualified units are found during the inspection, double the number of samples mentioned above shall be drawn from the same batch of generators for re-inspection. If there are still unqualified units, the batch of generators must be inspected for each unit. 5.7 The test methods for items b, c, e, f, h of Article 5.2 of this standard and items b, c, d, e, f, k, l, 0, P of Article 5.1 shall be carried out in accordance with GB/T 14481. For items b and h of Article 5.2, the thyristor, silicon rectifier and trigger device must be reliably short-circuited before the test to avoid damage. For the winding of the brushless generator, the above items are allowed to be carried out on the semi-finished product. For item b and h of Article 5.2, the thyristor, silicon rectifier and trigger device must be reliably short-circuited before the test to avoid damage. For the winding of the brushless generator, the above items are allowed to be carried out on the semi-finished product. For item b and h of Article 5.2 of this standard, the thyristor, silicon rectifier and trigger device must be reliably short-circuited before the test to avoid damage. 4. The temperature rise test of item g of this standard shall be carried out at rated frequency, rated power and rated power factor. 5.8 The efficiency determination of item g of item 5.4 of this standard adopts the direct method. The generator is operated at rated frequency, rated power and rated power factor. When the temperature of each part has basically reached stability, the generator input power (P), output power (F), thermal resistance (R) and current () of each winding and cooling air temperature (t) are measured. The I′, R, loss of each winding is converted to the value when the cooling air temperature is 25°C according to formula (3). Z(f'R: =2
Where: e;—temperature rise value of each winding, K, 235 +A6, + 25
235+40,+t
When the temperature of the cooling air is 25℃, the generator efficiency () is calculated according to formula (4) =
×100%
Where: P'—converted generator input power, calculated according to formula (5): P'=P+z(PR)-E(FR) -
Note: For brushless generators, if the cooling air temperature is 20-30℃ during the efficiency test, the efficiency is not allowed to be calculated. 5.9 The determination of the steady-state voltage regulation rate of the standard 5.2 d and 5.4 1 should be carried out under the condition of rated power factor. (3)
Before the test, the generator is idling, and the speed and no-load voltage are adjusted to make the speed the specified value: make the voltage within the voltage regulation rate range. For generators with uncontrollable excitation mode, it is allowed to be measured First adjust the load and power to the rated value: then gradually reduce the load to zero, and then re-adjust the medium voltage. During the test, the voltage setting device should remain unchanged. When the power factor is 0.9 (lagging) or 1.0, when measuring the steady-state voltage regulation rate, the power factor should be kept unchanged, and the load should be gradually increased from zero to the rated power, and then gradually reduced from the rated power to zero, and the voltage at each point should be measured. At this time, the speed should be based on the determined steady-state regulation rate according to the load. The power changes linearly. During the type test, the load change point by point is about 25% of the rated power. During the inspection test, the number of measuring points can be reduced as appropriate.
When measuring the hot voltage regulation rate, it is allowed to re-adjust the empty voltage. 5.10 Article 5.1 Item h of this standard shall be carried out in accordance with the provisions of GB10069. 5.11 Article 5.4 Item i of this standard shall be carried out in accordance with the provisions of GB10068. When the control box is at the specified measuring point position, the measurement point shall be arranged in accordance with the provisions of Appendix B of this standard. 5.12 Article 5.1 of this standard shall be carried out in accordance with the provisions of Appendix B of this standard. 5.4, item m, shall be carried out in accordance with the provisions of GFi/T12665. 5.13 5.4, item n, of this standard shall be carried out in accordance with the provisions of GB4824. 5.14 5.5, item c, of this standard shall be checked for installation dimensions and tolerances in accordance with the provisions of GB/T4772.1 5.15 The test of the protection level of the generator casing may be carried out when the product structure is finalized. The test method of the casing protection level shall be carried out in accordance with the provisions of GD/T4942.1:
5.16 5.2 of this standard shall be carried out in accordance with IB/T 5810 or JB/T 9615.1, 6 Marking, packaging and quality assurance period
6.1 The nameplate material and the method of engraving the data on the nameplate should ensure that the handwriting is not easily erased during the entire service life of the generator. 6.2 The nameplate should be firmly fixed in a conspicuous position on the generator base. The items to be marked are as follows: a) Manufacturer's name;
h) Generator name (single-phase stepping generator); c) Generator model;
d) Rated power;
e) Rated voltage:
) Rated current;
g) Rated power factor:
h) Rated frequency:
1) Rated speed:
J) Rated excitation voltage or rated excitation voltage of the exciter: k) Rated excitation intermediate current or rated excitation current of the exciter: Note: For generators with reverse magnetic field excitation, items j and k do not need to be marked: 1) Insulation grade:
m) Manufacturer's product number, year and month of production
n) Weight:
0) Enclosure protection grade (chrome plate is allowed to be made separately):) Standard number
6.3 The outgoing terminals of the main winding, auxiliary winding and excitation winding of the generator should be marked with numbers, and the terminal board should have corresponding markings, and ensure that the characters are not easily erased during the entire service life of the generator. Its markings shall be in accordance with the provisions of Table 13. The markings of other windings and the markings of the excitation device shall be specified by the manufacturer in the relevant documents. Table 13 Terminal markings
Winding name
Stator main winding
Stator auxiliary winding
Excitation winding
Terminal markings
The generator shall be provided with a wiring marking diagram: Its terminal markings shall be consistent with the terminal, and the wiring marking diagram must be reliably fixed. 6.4 The generator rail extension key shall be tied to the wheel, and the surface of the key and the flat key shall be rust-proof and protected. Flange-type generators shall also have anti-induction and protective measures on the processed surface of the flange. 6.5 The packaging of the generator shall be able to ensure that it will not be damp or damaged due to poor packaging under proper storage and transportation conditions. 6.6 The words and signs on the outside of the packaging box should be clear and neat, and the contents are as follows: a) Name of the shipping station and manufacturer:
h) Name of the cargo station and receiving unit:
c) Generator model and product number:
d) Net weight of the generator and gross bill of lading together with the packaging box: e) Packing box dimensions:
I) The words "handle with care" and "afraid of moisture" should be marked in appropriate positions on the outside of the packaging box, and the graphics should comply with the provisions of GH191. 6.7 Instructions for use and maintenance, circuit schematics, product certificates and spare parts should be provided to users along with each generator. 6.8 Spare parts of generator include:
a) brush per unit (brush generator): 5) brush holder 1/4 per unit, but at least one unit (brush generator):) Spare parts of the dynamic device shall be specified in the relevant documents of the manufacturer. 6.9 If the user uses and stores the generator correctly according to the manufacturer's operating and maintenance instructions, the manufacturer shall ensure that the generator can operate well within one year of use, but not more than two years from the date of shipment from the manufacturer. If the generator is damaged or cannot work normally due to poor manufacturing quality within this specified time, the manufacturer shall repair or replace parts or generators for the user free of charge.
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