This standard specifies the basic parameters, technical requirements, test methods, inspection rules, packaging, etc. of marine synchronous generators and their excitation devices below 2500kW (50Hz and 60Hz). This standard applies to synchronous generators and their excitation devices driven by internal combustion engines and used as ships and offshore oil platform power stations. This standard can also be used as a reference for generators driven by steam turbines, shaft generators and marine generators with a capacity of more than 2500kW. GB/T 12975-1991 General Technical Conditions for Marine Synchronous Generators GB/T12975-1991 Standard download decompression password: www.bzxz.net

[mC 621.313.322 -629.12
National Standard of the People's Republic of China
GB12975-91
General specification for synchronous generator in ship
Published on June 6, 1991
National Technical Supervision
Implementation on March 1, 1992
National Standard of the People's Republic of China
General specification for synchronous generator in ship
This standard is based on the international standard TEC!92 (third edition, 1880). 1 Main content and scope of application
GB 12975-91
This standard specifies the basic requirements, test methods and inspection rules, packaging, etc. of the generators and excitation devices for use below 2500kW (50F and 60L). This standard is applicable to synchronous motors and their installation sections driven by internal combustion engines and used in offshore oil platform power stations. This standard also applies to generators driven by steam turbines, shaft generators and marine generators over 2500kW. 2 Reference standards
G191 National marking for packaging, storage and transportation
CB755 Basic technical requirements for energy-saving motors
Motor structure and installation type code
GB1029
Two-phase synchronous motor test force method
Motor output terminal marking and steering
GE1971
GB1993
Motor cooling method
Basic environmental test and supervision procedures for electrical and electronic products Test of alternator heat test force 243.6 Basic environmental test procedures for electrical and electronic products Test: long each test method G2423.17 also works on the basic environmental test procedures for products Test KB, salt spray test method GB4772.1~4772.3 motor Dimensions and tolerances GE4881 Method for reducing the model of motor productsbzxZ.net
B4942.1 Classification of external protection of motors
G7060 Basic technical requirements for marine motors
GB10068.1 Method for measuring and limiting vibration of rotating motors GE10068.2 Method for measuring and limiting vibration of rotating motors Simple method for measuring noise limits
GB10089.2 Method for measuring noise of rotating motors Delivery and sales noise limits
GB100e9.3 Method for measuring and limiting noise of rotating motors 3 Classification, basic data and model representation method 3.1 Classification
The specific categories selected by the products according to the following classifications shall be specified in the technical conditions of their respective products. 31.7 Phase connection:
, single-phase synchronous generator. The product code is, introduced by the national technical supervision department, approved on 1991-06-08 and implemented on 1892-03-01
GB12576--91
single-phase synchronous generator, product code is T). 3.1.2 According to the rotor structure, it can be divided into: non-recessed rotor, hidden pole rotor, hidden pole rotor, according to the structure and installation method (see 997), table 1: IMI00L, IM120: IM300: IM300: According to the cooling method (see 3R1993): 5, IC01, this type is divided into two types: without air filter and with air filter. The structure code of the air filter is LW37A71, and the structure code of the water filter is 5. External protection certificate (see GB4942.1) points, 3.1.5
IP44, only applicable to IC:WS7A 1 cooling motor, if the generator has a terminal board, the terminal box protection should not be lower than P, 1V generator protection level should not be lower than IP23.
According to the excitation method, the excitation method code is X for the phase compound excitation system with automatic voltage regulator, the excitation method code is S for the three-phase harmonic excited system with automatic voltage regulator: brushless system, the excitation method code is W; other excitation methods, the magnetic method code is in accordance with B4B1 in the product technical specifications. Control bearing structure:
limited bearing,
sliding bearing,
According to the sliding bearing lubrication method:
self-lubricating
lubricating.
According to the bearing configuration type,
double bearings, the basic structure type
single bearing. If the user needs, it should be confirmed when ordering the product. According to the generator rotation direction:
clockwise (from the generator shaft end). For the basic structure type a
counterclockwise, if the user needs, it should be specified when ordering the product. 3. 2 Basic parameters, rated vibration, T
3.21 Rated frequency
50. (60) Hz
Note, (DH> for export products to choose.
3. 2. 2 Rated voltage
See Table 2 for the new rated voltage.
32. 1 Rated speed
Rated speed see Table S.
Rated power factor, H
Rated power factor see Table 4.
3.2.5 Rated power
12975—81
Rated voltage,
290400
Rated speed./mi0
Nuclear rectification
New power group teaching (after full)
1. 2.3.5,7.5,10,12,16,20,24,30,40,50,64,75.90,120,15G.200,250,(280),300,(315),(355),400,450).500,(660)680,(710),809.(900),1000.(1120),1250.(1400),1600.(B00),200D<2 240)2 600 kW,
method, please use the data in brackets,
rated power can be expressed by the corresponding V·number.
③ If the user needs other temperature-controlled motors, the rated power calculation data shall be specified by the motor manufacturer. 3.2.B Connection symptoms
Three-phase generator set connection One-phase three-wire or three-phase four-wire 3.2.7 Working system
Connected working system (S1):
3.3 Model indication method
GB1295-81
The generator model consists of product code, specification code and special code in three parts, which are listed in sequence. The use of various codes should comply with the relevant provisions of GB/T 3I. The model is indicated as follows: Product code
Specification code
Special system code: H
Center height (mm), total length (long, medium and short core codes are L, M, S respectively) Transformer rate kw (kv+A)
Cooling system type code: Air filter is 1: Water cooler is 5
Super-cooling type code
Synchronous engine type code
Note, 250 kV, A> and below generators are coded with center, core length and type UkW (V· The specification codes of motors above can be expressed in two ways as shown above. They must be listed in the product technical specifications. 4. Technical requirements. 4.1 Environmental condensation The generator and its auxiliary system should work normally under the following environmental conditions. 4.1.1 The ambient air temperature is 50℃. When using water-cooled lamps, the water inlet temperature of the cooler Should not exceed 32℃: *.+.2: Relative humidity of air 96%+.4.3 There is no salt mist, oil mist, bacteria. 4.1.4 Temperature:
Horizontal 15° (22.5° for emergency generator). Horizontal 22.5″.
Horizontal 5° (10° for emergency generator). 6 ([0\] for emergency generator)
4.1.5 There are ships and offshore oil platforms The platform will be impacted and shaken during operation or operation. 4.2 Material requirements
4.2.1 The external filling material should be steel material or a load-bearing material with a compression strength of 196.13×10°Pa and a perturbation strength of 32.37×10%Pa or more.
4.2.2 The shaft material should be heat treated with appropriate shearing technology to ensure that its tensile strength is not less than 1!.30×10°Pa. The national point is not less than 210.84×10Pa.The selected postal rate (length should not be less than 24K, the chemical or chemical properties of the material should comply with the provisions of Taiwan 7060, 4.2.3 should be low in fuel, humidity, and per year, 4.2.4 The semiconductor components used in the generator and its excitation system should be made of silicon materials as much as possible, and should be properly treated with thermal aging and electrical aging. The rectifier tube used in the brushless generator should comply with the provisions of relevant standards. 3 Structural requirements || tt || 4.3.1 Machine base
, the base should be equipped with a drain tray or a guide
G127591
h, for WS7A1 type motor with water cooler, a drain tray should be installed at the bottom of the base to drain or drain water;: there should be an inspection window on the base to facilitate the inspection and replacement of brushes or rectifier tubes: d,: there should be a place for placing nameplates, power inspections and printed inspection or product license marks in a conspicuous position on the base, 13:2, things||tt| |, the bearings should be able to effectively lubricate when running under the tilting state specified in Article 4.1.4. Self-lubricating sliding bearings with oil should be installed properly to prevent the lubricating grease from flowing along the electric shaft or other means to the insulated parts of the motor or any live parts:
: Generators with rolling bearings of 20*W and above should have effective oil holes and operating contacts. If required by the user, they can also be installed according to the size of the dynamic bearings. Generators equipped with self-lubricating bearings should be equipped with inspection holes or oil indication screws. In order to prevent excessive oil in the bearings, each bearing pressure should be set with an appropriate pressure gauge. At the same time, there are bearings with measuring bones: measures to prevent the harmful effects of the motor current. For sliding bearings without insulation, the allowable value of the shaft voltage is 500mV, corresponding to an effective voltage of 360mY. For the forced lubricating sliding bearing structure, the When the bearing is insulated, an insulating ring should be added to the oil pipe flange to prevent the bearing insulation from being short-circuited by oil. 4.3.3 Condensation heater
When the anti-condensation heater is required to prevent condensation on the generator, the power of the heater should make the temperature inside the casing higher than the ambient temperature of the generator, so as not to cause the insulation near the heater to exceed the specified temperature limit. The heater should use a single-shot fast-acting heater and be installed so that it is easy to check and replace. 4.3.4 No. 1 Equipment
For generators with air filters, the air filter should be made of materials with good air permeability, high efficiency and easy cleaning. The filter should be easy to disassemble and clean. The motor with air filter should be equipped with internal dehumidification detection or thermal protection components. 4.3.5 Water cooler
The internal cooling quality of the water cooler is sea-change. The water temperature should not exceed 32 degrees to ensure that the air temperature at the cooling point is not More than 0. The structure and installation style of the water cooler should be easy to dismantle and clean. The arrangement of its pipelines should be easy to blow out the air in the pipes. The materials of the pipe and water chamber should be wear-resistant and anti-corrosion. The water pressure resistance test of the cooling part before the cooling is carried out for 15 minutes at 1 Pa. The cooling part should be equipped with a 1CW37A71 micromotor and a set of sensor components. The water protection device and temperature detection component of the sensor component group should be installed. 7A7 type generator is designed to be used as an emergency cooling device when the cooling water cooler element of the water cooler fails: 4.-3.6 Thermal protection
In order to regulate the temperature of the generator group and prevent the group from overheating, a temperature detection element or a thermal protection element should be installed in the 1C01 type air overheating device of the generator. If the user needs, both can be used at the same time. The characteristics of the temperature detection element should be matched with the insulation grade of the generator. The operating temperature of the temperature detection element used for the general monitoring should be 20K lower than the operating temperature of the temperature detection element. These temperature detection elements and thermal protection elements should be located at the hot spot of the group and installed in each phase winding respectively. The thermal protection element and the whole winding should have good thermal contact. 4.3.7 Damping group and commercial wave control measures For generators with parallel requirements, a damping group or an equivalent solid structure should be used. For generators used in cruise ships and engineering ships, if large nonlinear loads are used, effective damping measures should be taken to prevent the motor from overheating.
4.5.8 Insulation level
H insulation level, the upper level is the basic insulation level of the ship's synchronous generator. 4.3.9 Load position
GA 12975-91
Wire box (including the outlet position of the backpack-type fan) on the longitudinal axis of the generator (viewed from the axis). If there are special requirements, they should be specified in the order contract.
4.3.10 Outgoing terminal
4.3.10.1 The output terminals of each group of the generator and the output terminals of each pair of devices shall be marked as specified in Table 5, and the terminal board in the terminal panel shall have corresponding markings. The markings on the output terminals and the terminal board shall be clear. 4.3.10.2 In order to make external wiring, a copper wire (bus) with appropriate contact strength should be placed in the vicinity of the recording, and the connection pole (bus) and the change board should be fixed to prevent loosening. A certain space should be left between the hot wire poles (buses) for easy operation to avoid short circuit, grounding and leakage.
4.3.10.5 All outgoing terminals of generators above 1000V should be stored in the output system. Unless measures are taken to ensure that the disconnected outgoing terminals can be approached without danger, the medium-voltage outgoing terminals of the generator should not be mixed with the low-voltage outgoing terminals in the same output tray. *5
Sufficient to meet
wiring metal electrical and electrical distance of the excitation system group unobstructed measurement generator
machine winding
wiring box electrical image and the minimum distance should meet the requirements of 6, 4.3.12 solidification and alkali magnetic index
cold boiling heating retention according to the thermal decomposition of the components protection element XI
all fasteners should have anti-loosening devices, the album installed on the motor should be resistant to expansion or installation, 4.3.1.5 grounding
the generator can be replaced before the grounding device and marked with the specified grounding symbol or graphic mark, the design of the replacement cap should meet the provisions of G755 in 13.1, when using grounding bolt grounding, the grounding bolt diameter should be [(100 The sequence of generators below V should not be less than dmm. The sequence of generators above 1000V should not be less than 10m, and sufficient mechanical strength should be considered. The connecting screw is made of high-quality or conductive and good isolation-resistant materials. Nominal voltage, 61--250 251-360 381--500 501~1500 1013600 3601--7 209
Polyelectric high
4.4 Performance requirements
4.4.1 Starting
GB12975—91
The generator and its excitation device can start reliably, the voltage of the uncontrollable phase compound excitation generator after cold starting shall not be greater than 95% of the rated voltage, the starting voltage of the adjustable phase, controllable three-phase harmonic passive aldehyde and photoelectric generator shall be within the voltage value of the steady-state positive voltage regulation rate range, 4.4.2 The voltage setting range is ≤A,)
The magnetic device of the generator shall be equipped with a voltage setting device, which shall be placed in On the distribution board, the voltage recovery range in no-load state is 95%~1% of the rated voltage (the voltage setting range of the uncontrollable phase motor should not include the starting state). 4.4.3 Steady-state voltage regulation rate ()
When the generator load (the blue-phase generator is three-phase symmetrical) is any negative value between zero and rated power, and its power factor maintains the new set value, the steady-state voltage regulation rate of the generator should not exceed ±2.5#.
The steady-state voltage regulation rate is calculated according to the formula ():
=-± s × 100%
Wherein, -The maximum and minimum values ​​of the motor terminal voltage when the load changes between zero and rated load, -The generator rated voltage, V.
, the setting speed should not exceed %-generally %~-5, 4.4.4 Three-phase generator stock positive adjustment and recovery time Three-phase synchronous motor and its dynamic device cover are operated under constant voltage state. The generator is in no-load state. The final rated current and the average factor are not more than 0.4 (lag> of the three-phase symmetrical load, and then the load is gradually unloaded. When the voltage drops, its decompression voltage adjustment factor should not exceed 15%, and when the voltage rises, its transient voltage source adjustment factor should not exceed 205%. The time required for the generator voltage to recover and maintain within the range of ±3 rated voltage with the maximum steady-state value should not exceed 1.5s. Transient voltage adjustment rate calculation formula (2) and formula (3):er
In the formula,
In the formula, tsrn
The maximum voltage after load unloading (peak value): V rated voltage (peak), V
+--x×100%
The maximum positive value after actual load (selected value) V rated voltage (peak), Y,
4.4.5 Waveform distortion
The sinusoidal distortion rate of the no-load line voltage of the synchronous generator shall not exceed the following values: 5 for rated power of 24W and above: 10 for rated power of 10k to 24kW; 10 for rated power below 10W, in accordance with the technical conditions of various products. 4.4.6 Unbalanced transmission load of three-cabinet generator
When the three-phase synchronous generator is under load operation, any "phase current" When the current does not exceed the rated value and the difference between each current does not exceed 15%, it should be able to work regularly, and its temperature rise meets the requirements of 4.4.15. At this time, the difference between the maximum (or minimum) load voltage and the average value of the three-phase line voltage should not exceed 5% of the average value of one-phase line voltage. 4.4.7 Overspeed
The motor should be able to withstand 120% rated current for 2mln under no-load conditions without damage or harmful deformation. 4.4. Thermal overcurrent
The generator and its excitation protection device should be able to withstand 150% rated current for 2mln in the hot state. The voltage should be maintained at 1
GH12975-$1
as much as possible. The fixed power factor is. (After cleaning), no damage or harmful deformation shall occur. Deformation, 4.4.9
The motor and its mounting plate shall be able to operate at 11 series rated current in the heat rate card [.1]. The motor shall not be considered to be derated, but no damage or general deformation shall occur.
4.4.0 Short-time high voltage test
The winding of the generator shall withstand a short-time increased voltage test, and the seat shall not be burned or dust-proof. The test is carried out when the generator is cold. The test induction voltage is 13% of the rated voltage and lasts for 10 minutes. When the voltage is increased to 180 rated voltage, it is allowed to change the speed at the same time, but it should not exceed 115 rated speed.
For the generator with reverse bank comparison: when the speed is increased by 5 rated speed and the excitation current has increased to the allowable limit, the induction voltage shall not reach the specified test voltage. , the test is allowed to be carried out under the conditions that can be achieved: 4.4.17 Short-circuit current
The three-phase synchronous generator is running at rated voltage and rated frequency at idling. At this time, the three-phase sudden short-circuit current peak should not be less than 15% of the rated value and 21% of the effective value. The sudden short-circuit current value of the single-push synchronous generator should be specified in the technical conditions of this type of product
4..3 Short-circuit test of the machine
The sudden short-circuit mechanical strength test of the generator is only carried out when the user makes clear requirements during the test. If there are no other regulations, the test should be carried out at 105°C without load, the short-circuit lasts for 3s, and no deformation should occur after the test. If the ear-phase withstands the withstand voltage test, it is considered qualified. 4.4-13 The generator and its excitation device shall be able to maintain 3 times the rated current value in short-circuit state for 25 seconds. 4.4:14 Parallel operation
For two-phase synchronous motors with parallel requirements, they shall be able to compensate for the parallel operation. For each generator in parallel operation, when the load changes within 20% of the total rated power, the total reactive load borne by each generator shall not be greater than the smaller value of the following values: 10% of the maximum generator reactive power and 25% of the minimum generator rated reactive power. 4.4.15 Temperature rise
4415.1 When the generator and its devices are operated at an ambient temperature of 500°C, the temperature rise values ​​shall comply with the provisions of Table 7. 4.4.15.2 Bearing temperature shall not exceed:
For dynamic bearings: 80℃ (oil temperature not more than 65℃>: For rolling bearings: 90℃
4.4.15.3 For motors with water coolers (ICW37A71 type), the temperature rise shall be calculated according to the air temperature that has been cooled before entering the machine. The water inlet temperature of the cooler shall not exceed 32℃: If the air temperature after cooling is 45℃ at this time, the temperature rise shall be as high as specified in Table 7. 4.4.16 Dielectric performance test
The external power output test of the generator includes measuring the source resistance of the disc, the insulation withstand voltage test to the ground and the circuit 4.4.16.1 The insulation resistance of the system group
The cold insulation resistance of the motor porcelain group shall not be less than 5MP, and the hot insulation resistance shall not be less than 2MO. The voltage absorption of the disc shall be as specified in the table.
Email of TV
GE 127591
Power is less than 20(k) 0
(k,) alternator between
h power is 200(k.4) and below the AC burning
use DC power AC generator also use DC power generator (except for the four-generation AC generator in the skin)
b. In the case of lower or only AC generator single conductor water long-term marriage of absolute drift burning"
The light of water falling for a long time will not explode
The core and other parts connected with the potential group
The core and other parts of the method
The first wire must be connected with the external environment conductor
The wire wax has a protective layer
There is a saturation point
125:425
The ancestor of these parts should not, under any circumstances, expose the neighboring dangerous nets or other materials Note: 1) For generators with an amplitude of 200 or less, the limit value of the F-class insulation group is also increased by 6K when the stacking method is used for measurement.
2) For multi-layer windings, the following are all related to the connection of the ring and the cold car, which are also included. 3) The heat test belt can be used instead of
4) The limit value is only used when the core ring adopts the insulation practice suitable for the use of the cavity. It is allowed: but if the four collectors are close to the environment, their rise will not exceed the limit of the combustion efficiency. The temperature rise is limited to the measurement of the humidity meter. When the electrical material is used for the electrical performance measurement, the rise resistance should be negotiated between the manufacturer and the user. 5) If the temperature rise is 90° or higher, pay special attention to the selection of brush materials. 8
Photoelectric motor rated voltage
36-~5G0
501~3300
4. 4. 76-2 The insulation voltage test of each winding of the generator and its excitation equipment to the ground should be able to withstand the test voltage specified in Table 9 for a period of time of mm without breakdown.
Part name
Motor and auxiliary winding casing
Generator armature resistance to shaft auxiliary terminal
GB12975--·91
Test voltage: effective value)
Generator armature resistance to shaft auxiliary terminal
8. The excitation voltage is 5DGV and The following and
b punishment for the excitation voltage being above 50uV
the armature winding connected to the excitation seat device with a submeter in the casing modified the glass machine
the plate in the generator set is buried with a special detection element and a thermal protection element for the various windings and the machine light
the anti-drop heater is forbidden to have a 10-level recording quality damage voltage, but the lower limit is 1500V1000V2 times the stationary positive plate
1000+ but the minimum step [500
is the same as the main generator set described
and should try to avoid induction recovery in the above test adjustments. However, if the system is to be tested for annual monitoring, etc., each group shall be tested with idle voltage and low charge. Note: No comparative test shall be carried out on conductors and capacitors. The test shall be carried out on the entire generator set with the entire generator connected to the ground. 4.4.16.3 Isolation test. The voltage shall be the actual commercial voltage of the winding to the ground. The limit value of the generator winding inter-turn insulation impulse test is determined. The peak value of the impulse test voltage of the scattered inductance winding of the 1140V and lower generator is =KXK:XAX
generator porcelain group voltage rolling impulse test voltage solution value, V, where:
H, ——voltage coefficient, connected to 1. 41
K2—operation coefficient, take 1. 11
K, size coefficient, the frame number is less than or equal to [00, take 0.9; the frame number is greater than ±t00, take 1.0, e
empty or rotor cable group to ground insulation withstand voltage test value (right effective value), V. The time before the impulse test is 0.55
b. For generators with rated voltage above 11V, the peak value of the impulse test level is 6.6kV for generators with rated voltage of 3.15kV and 6.3V, take 10.9V. When the winding voltage is 4 or less, the impulse electrical value is B5% of the upper value. 4.4.17 Pre-humidity test
The generator and its excitation device have humidity performance. After 65℃, 6 cycles of cross-condensation heat test, they should be able to meet the following requirements. 4.4.17.1 The insulation resistance between the motor winding and the machine charging energy group should not be less than the following numbers:, P22.P23 of the generator. Connect or (5) determine the typical electrical diagram: K=2X
The insulation resistance value determined by the above formula is low FM. Then follow the test stack of 32. The insulation resistance of the IP44 transformer is determined according to formula (6): 1
CE1297591
16004100
In the above two formulas, User is the rated power of the generator, kW (KY·A); R is the nominal voltage of the generator set, V;
R is the insulation resistance of the motor, M. (5
4.4.17.2 The generator assembly shall be able to withstand a 1-minute withstand voltage test without breakdown. The effective value of the test voltage is 85% of the test voltage specified in Table 9 of 4.1.16.
4.4.17.3 The electromechanical and chemically treated parts of the generator and its excitation device shall meet the following requirements to be qualified: the parts that can affect the performance of the product, such as the nameplate, the joints of the conductive parts, the key parts of the movable parts, etc., shall not show corrosion. The number of parts with surface cracks that are 5% to 25% of the main surface area of ​​the parts shall not exceed 20% of the total number of parts. The number of parts other than the image parts (or the number of parts with surface cracks that are 5% to 25% of the main surface area of ​​the parts) shall not exceed the total number of parts of this type of product, but the number of parts with carbon fiber surface area of ​​more than 25.4 is allowed. 4. If the appearance of the surface oil of the electric batching machine meets the following requirements, it is considered qualified. 8. There shall be no more than 3 bubbles with a diameter of 0.5~3mm on any square meter of the main surface of the product. Among them, there shall be no more than 3 bubbles with a diameter greater than 1mm, and no more than 10 bubbles with a diameter greater than 2mm. Bubbles with a diameter greater than 3mm and cellular bubbles that account for more than 30% of the surface area are not allowed. There shall be no more than 10 rust spots on the bottom of the component. There shall be no more severe sticking or sagging. 4.4.17.5 The surface rust of the chip shall be inspected within 24-48 hours after the heat test. During the inspection, a new No. 11 or No. 12 medical knife shall be used to cut the four small squares on the flat surface of the main component of the product. The area of ​​each square shall be 1 mm*. After heat treatment, check the squares for rapid shedding. If the bottom cluster of the squares does not fall off or the surface clusters do not fall off more than 30 squares, it is considered qualified.
4.4.17.6 If the appearance quality of plastic parts shows the following phenomena, it is considered qualified. The surface is seriously discolored, the filler is swollen or exposed, wrinkled, deformed, cracked or white bubbles with a diameter of 0.3~0.5mm are distributed in an area greater than 5% of the part area. The distribution area of ​​bubbles with a diameter of 0.5~1mm is greater than 15% of the part area. The distribution area of ​​bubbles is determined by the following method.
Blood, when the distance between two adjacent bubbles is less than or equal to 3mm, it will push the sealing area of ​​the adjacent bubbles back to the line. b. When the distance between two adjacent bubbles is greater than 9m, the area of ​​each bubble is calculated as 1m m ratio, the sum of all bubble areas is the bubble distribution area
4.4.18 Anti-bubble performance
The cable group and insulation materials of the generator and its excitation device shall have a certain interruption capacity. After testing, they shall meet the secondary requirements specified in 2423.15.
4.4.19 Salt spray resistance
The metal parts and chemically treated parts of the generator and its two frames shall have salt spray resistance. According to the material of the parts, the chain layer and the treatment process, the duration and the standard of the salt spray test are shown in Table 10.4.20 Color
The generator shall be tested according to the operating environment conditions specified in Article 4.1.4. After the test, the bearing components shall not exceed the allowable temperature specified in Article 4.4.15.2, and the grease (extraction) shall not leak. 4.4.27 Noise
The noise of the generator shall comply with the provisions of GB10069.3. 1
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