JB/T 4401.2-1999 Marine small three-phase synchronous generator technology
Some standard content:
U61 | | tt | | JB | Released on 08-06
National Machinery Industry Bureau
Technical Conditions
Implemented on 2000-01-01
Released
JB/T4401.2-1999| | tt | ) (Equipment generators and outgoing engines" GB10068 (Mechanical vibration of motors with a height of 56 mm and above - Determination, evaluation and limit values ??of vibration) [idt1EC60034-14 (1996) 1 "China Classification Society Steel Sea-going Ships "Class Construction Specifications" (1996) and current national standards and industry standards, the revision of ZBK21002-89 (Technical Conditions for Ship-Moon Winglet Phase Synchronous Generators): the writing format is in accordance with GB1.1-1993 and GB/T1.3 —Revised in 1997
Comparison of this standard with the original standard ZBK21002-89, the provisions for tilt swing, output power unit, ambient temperature, temperature rise limit electrical clearance, creepage distance, calculation of steady-state voltage adjustment rate The formula, vibration intensity limit, etc. have been modified, the clauses on the short-term elevated electrical test have been deleted, and the electrical properties before impulse have been added | The Institute of Electrical Appliance Science is responsible for drafting this standard. The drafters of this standard are: Ma Juncuo and Shi Shuben. This standard was first published in March 1989.
Republic of China Machinery Industry Standard
Small three-phase synchronous generator for ships
Technical conditions
Specification for small three-phase synchronous generator in ships scope
JB/T 4401.2[999| |tt||ZBK2I002-89
This standard specifies the basic plastic parameters, technical requirements, and test methods of 50Hz (60Hz), 5~200kW marine small three-phase synchronous generators (hereinafter referred to as generators) , inspection rules, etc. This standard is applicable to dry medium diesel oil and diesel engines, small engines and their moving magnets used as center stations of ships (excluding low-end demagnetization systems)
Quote Standards | All parties should explore the possibility of adopting the latest versions of the following standards: GB 191—1990
GB/T 755-
GB/T 997—1981
GB/T 1029 — 1993 | | tt | A certain rating and performance of the rotating motor
Motor shrinkage installation type and code
Three-phase synchronous motor test method
Motor line end mark and direction of rotation
Shifting electric chaos Cooling and
Basic Environmental Test Procedures for Electrical Products Test Db: Alternating Heat Test Method GB/T 2423.161990
GB/T 2423.171993
GB/T 2829—1987|| tt||GB/T 4772.1-
GB/T 4831-1984
GB/T 4942.i-1985
GB,T 7060—1994
GB10068—
GB 10069—1988
G8/T 10250—1988
GB/T 12351—I990
GB/T 14048.11993
GB [4711—1993
Basic Environmental Testing Procedures for Electrical and Electrical Products Test J: Basic Environmental Testing Procedures for Electrical Products in Changchun Test Method 1 Test Ka: Salt Spray Test Method Periodic Inspection and Counting Sample Taking Procedure and Sample Acceptance Table (Applicable Inspection of the stability of the production process) Small size and power level of the rotating motor
Measurement, evaluation and limits of dynamic vibration of machines with a center height of 56mm and above Environmental Technical Requirements for Motors
Low-voltage switchgear equipment and control equipment (General Provisions) General safety requirements for small and medium-sized rotating electrical machines
Approved by the National Machinery Industry Bureau on 1999-08-06 and implemented on 2000-01-01||tt ||1
JIB/T 4159—1999
JB/T 57931991
JB/T 5810—1991
JB/T 581I1991
JB/ T 9615.1—1999
JB/T9615.2—1999
Type, basic parameters and dimensions
3.1
Rated power
JB/T 4401.2— 1999
General technical requirements for tropical electrical products
Technical conditions for voltage regulating devices of marine synchronous generators Motor pole alignment and field winding pressure insulation test specifications AC low-voltage motor loose-embedded winding insulation test method AC low-voltage motor loose-embedded winding insulation test limits The rated power of the generator is specified in Table 1, and the unit is kVA or kW: installation
kVA| |tt||kw
KVA
kw
3.2
6.25
5
50
40||tt ||Rated frequency
50 Hz(60 Hz)
9.38
7.5
62.5
50
Note: (60Hz) only Available for export products. Fixing voltage
3.3
The fixing voltage is shown in Table 2.
Fixing voltage
Rated frequency
Rated speed
3.4
The rated speed is shown in Table 3:
rated rate Hz
50
(60)
3.5 rated power factor
0.8 ( lag)
3.6
3.7
Connection
V
Hz
12.5
10
80
64
1500
1800
15
13
93.75
75
Table 2
390, 400
50
Table 3
20
16
[12.5
90||tt| |25
20
150
120
rated speed
r/min
1000
1200||tt ||Generator winding connection method is three-phase three-wire system (Y) or three-phase four-wire system (Y) working system
Continuous working system (S1)
Excitation mode
3.8
The excitation method is as follows:
2
30
24
187.5
150
450
fw
750
900
37.5
30
250
200
JB/T4401.2-1999
a) Phase compound excitation system without automatic voltage regulator (referred to as uncontrollable phase compound excitation), code-named X; b) Phase compound excitation system with automatic voltage regulator (referred to as controllable phase compound excitation) Phase-controlled compound excitation), code-named KX: c) Third-harmonic excitation system with automatic voltage regulator (referred to as third-harmonic excitation), code-named S Model representation method
3.9
Generator The model preparation should comply with the regulations of GB/T4831. 3.10 Motor dimensions and tolerances
Motor dimensions and tolerances should comply with the regulations of GB/T4772.1. The dimensions and tolerances of the generator shaft backbone should comply with the requirements in Table 4. 3.11
Table 4
Shaft punch diameter
38
42
48
60
70||tt| |80
90
3.12
Basic size
10
12
14Www.bzxZ.net
18
20
22
25
key
width
limit end difference
o
-0.036||tt| |0
-0.043
0.052
The radial circular runout at half the extension length of the generator shaft should not be greater than the requirements in Table 5.: 5
Axis radial runout
32
38
0.05
48
60
Basic ruler|| tt||00
9
11
12
14
70
0.06
key||tt| |80
High
mm
Limit deviation
6
0.090
0
w.in||tt ||mm
90
0.07
100
3.13 The radial runout of the generator flange stop on the motor axis and the flange installation grinding on the motor axis The circular runout of the end face should not be greater than the requirements in Table 6:
Table 6
Flange stop diameter
Radial and tumor runout limit
Requirements|| tt||130
0.100
230
250
300
0.125
350
The generator shall comply with this Standard requirements, and manufactured in accordance with drawings and technical documents approved by prescribed procedures: 4.1
4.2 Environmental conditions
The generator should be able to work normally under the following environmental conditions, 4.2.1, the ambient air temperature is 50℃ (the ambient air temperature of the automatic voltage regulator is 55%) 4.2.2 The relative air condensation is 95%, and there is dew, 4.2.3 There is the influence of salt spray, oil mist and density, 4.2.+Gu Xie Photography pendulum:
Heeling: 15° (22.5° for emergency generator); mm
550
0.160
Horizontal shot: 22.5°: ||tt ||Trim: 5° (10° for emergency generator): Trim: 7.5° (10° for emergency generator). JB/T 4401.2--1999
4.2.5 is affected by shock and vibration generated during normal operation of the ship. 4.3 Material requirements
4.3.1 The exterior light material should be made of steel or needle iron material with a tensile strength of not less than 196×10°Pa and a bending strength of not less than 392×10°Pa.
4.3.2 The tensile strength of the rotating shaft material shall not be less than 441×10°Pa: the service point shall not be less than 211×10°Pa; the elongation rate (longitudinal) of the sample shall not be less than 24%, and the The chemical composition should comply with the regulations of GB/T7060: 4.3.3 Generally, flame retardant, moisture-resistant, mildew-resistant, and low-toxic materials should be used. 4.3.4 The semiconductor components used should be made of basic materials as much as possible and should be thermally aged. Screening treatment of electrical aging. 4.4 Structural requirements
4.4.1 The external light expansion protection level of the generator is IP22: the protection level of the wire box is IP54, and its definition and technical requirements should comply with the provisions of GB/T4942.1:
4.4 .2 The installation structure types of the generator are IMB3, IMB34, and IMB35, and their definitions are in accordance with the provisions of GB/T997. If the user has special requirements, they can be specified separately in the order contract. The cooling method of the generator is IC01. Its definition is based on the provisions of GB/T1993 4.4.3
4.4.4
The generator uses rolling bearings, and effective refueling holes and drainage holes should be provided. 4.4.5
The generator base should be equipped with lifting holes or lifting holes, and the insulation grade should be Class B or F.
4.4.6
The junction box is located on the right side of the generator (from the shaft to the end stone). If there are special requirements, they should be stipulated separately in the order contract: 4.4.7
4.4.8 All fasteners should have reliable anti-loosening devices. The phase compound excitation device or automatic voltage regulator installed on the motor should have mitigation measures: 4.4.9·Obvious parts of the generator should have a location for a nameplate, direction and ship inspection mark 4.4.10||tt| |The minimum value of the electrical space and creepage distance of the junction box should not be less than the provisions of Table 7: its measurement methods and requirements are in accordance with the provisions of GB/T14048.1.
Install 7
Working voltage
(effective value)
100 and below
101-250
251 ~500||tt ||Impact test voltage
(peak value)
V
5000
6000
7000
Electrical image mm||tt| |Pollution level
2. 3. 4
4.0
5.5
6.75
Electrical distance mm (material group Ia)||tt| |Pollution level
2
1.4
2.5
5.0
Pollution level
2.2
4.0||tt| |8.0
pollution level
4
3.8
8.0
16
4.4.11 In order to facilitate external wiring, it should be It is recommended to install copper terminals with appropriate cross-section and mechanical strength at close locations, and fasten the terminals and the wiring board to prevent loosening. And there should be some space between the terminals to facilitate operation and avoid short circuit, grounding and touching. 4.4.12 The generator should have a grounding conductor device and be marked with corresponding symbols or graphics. The ground conductor terminal should be set close to the wiring terminal. If there is a junction box, it should be placed inside the junction box. For generators with a rated output exceeding 100kW, an additional grounding terminal should be installed on the base. The grounding bolt should be made of copper and have sufficient mechanical strength. The cross-sectional area of ??the grounding wire and the exact area of ??the grounding screw should be specified in Table 8: 4
phase cross-sectional area!
Ground wire and grounding screw carrying area
4.5 Performance requirements
4.5.1 Starting excitation
JB/T4401.2—1999
Table 8| |tt||0
to
t6
25
35
25
60
25||tt ||70
35
95
50
20
20
mm2
150
70
S5
95
The generator and its excitation device can be excited with the ground. The voltage of the non-controllable phase compound-excited generator after cold start-up is not less than 95% of the rated voltage. The cold-start and shutdown voltage of the generator of the controllable excitation system should reach a voltage value within the domestic voltage range of the steady-state voltage regulation rate. 4.5.2 Voltage setting range (AU,)
The excitation device of the generator should be equipped with a voltage setting device: this device can be placed on the distribution board. The voltage setting range when no-load should be no less than 95%~105% of the rated power (the voltage setting range of the non-controllable phase compound-excited generator does not include the excitation state). 4.5.3 Steady-state voltage regulation rate (8.)
The generator and its excitation device, when the total state regulation rate of the motor is 5%, when the three-phase symmetrical load of the generator changes from no-load to rated Under any load between loads, its power output should remain at the rated value, and the generator steady-state voltage regulation rate should not exceed 2.5%, steady-state voltage regulation rate is calculated according to formula (1): where U., U.
8
Umm-Ula×100%
2Uy
(1)
When the load changes from no-load to rated load, the minimum value of the output voltage (effective value) at the generator end, V;
U-——rated voltage of the generator, V
Note: The steady-state rate regulation of the linkage machine should not exceed 5%, - is 2%~3%. 4.5.4 Transient voltage regulation rate (8)
When the generator and its excitation assembly are running at no-load at rated speed and close to the predetermined electrical length, a three-phase symmetrical impedance load with 60% rated current and a power factor not exceeding 0.4 (lagging) is suddenly added, and the above load is suddenly unloaded. When the voltage drops, its normal voltage regulation rate should not be less than 15%; when the voltage rises, its transient voltage regulation rate should not be less than 20%; the time for the generator terminal voltage to recover and remain within 97%~103% of the final stable voltage should not exceed 1.5s; the transient voltage regulation rate is calculated according to formula (2) and formula (3): 8
a
Formula:
Uaowa miat
UN-
UN
UN
→UN
0%
000
The maximum instantaneous voltage (peak value) after sudden load unloading, V: The minimum instantaneous voltage (peak value) after sudden load addition. V: rated voltage (peak value), V
4.5.5 Waveform distortion
For rated power of 25kVA and above, the sinusoidal variation rate of no-load line voltage waveform should be less than 5%. For rated power below 25kVA, the sinusoidal variation rate of no-load line voltage waveform should be less than 10%. (2)
(3)
4.5.6 Asymmetric load
JB/T 4401.21999
When the generator is running under load, no phase exceeds the rated value, and the difference between the currents of each phase does not exceed 15% of the rated current, it should be able to work for a long time, and its temperature rise should comply with the provisions of 4.5.14. At this time, the difference between the maximum (or minimum) value of the line voltage and the original average value of the three-phase line voltage should not exceed 5% of the average value of the two-phase line voltage
4.5.7 Overspeed
The generator should be able to withstand 120% of the rated speed for 2 minutes under load without damage or harmful deformation. 4.5.8 Low overcurrent
The generator and its excitation and avoidance device should be able to withstand an accidental overcurrent of 150% of the rated current in the hot state. The duration is 2 minutes. At this time, the terminal voltage is maintained at the rated value as much as possible, and the power factor is 0.5 (lagging). No damage or harmful deformation shall occur. 4.5.9 The generator and its excitation devices shall be able to operate at u% rated current in a hot state; 1. This is not specifically based on the motor temperature rise. Minimum damage and harmful deformation. 4.5.10 Sudden short-circuit current The generator is running at no-load rated voltage and rated frequency. The two phases H are short-circuited at the same time. At this time, the short-circuit current peak value shall not exceed 15 times the rated current peak value or 21 times the effective value. 4.5.11 Sudden short-circuit mechanical strength test The three-phase super-circuit mechanical expansion test of the generator shall be carried out only when the user makes clear requirements when ordering: If there is no other stipulation, the test shall be carried out at the motor load and rated voltage. The circuit lasts for 3 hours. No harmful deformation shall occur after the test , and can withstand the withstand test 4.5.12 Thermal current maintenance capability
The generator and its excitation device can maintain an effective current of at least 3 times the rated current for 2s under steady-state conditions 4.5.13 Parallel operation
Generators with parallel requirements should be able to operate in parallel stably. For each generator in parallel operation, when the load changes within the range of 20%~100% of the total rated load, the difference between the actual reactive load borne by each generator and the reactive load calculated according to the rated proportional distribution value of each generator should not be greater than the smaller value of the following values: a) ±10% of the rated reactive power of the Zhengda generator: b) ±25% of the rated reactive power of the minimum generator: 4.5.14 Temperature rise
4.5.14.1 When the generator and its excitation device are rated for operation at an ambient temperature of 50℃, the temperature rise values ??of their various parts shall comply with the provisions of Table 9. 4.5.14.2 Bearing temperature shall not exceed 90℃. 4.5.15 Insulation resistance
The cold insulation resistance of the motor winding shall not be less than 5M0, and the hot insulation resistance shall not be less than 2M0. 4.5.16 Withstand voltage performance
The generator and its excitation device shall be able to withstand the voltage test specified in Table 10 for [min without breakdown.
4.5.17 Inter-interval impulse withstand voltage performance
The generator winding shall be subjected to the insulation impulse withstand voltage test: the peak value loss of the insulation impulse test of the sensitive winding generator shall be in accordance with the provisions of JB/T9615.2; the insulation impulse test voltage of the generator with formed winding shall be in accordance with the provisions of JB/T5811; the insulation test voltage limit of the generator with acid field winding shall be in accordance with the provisions of JB/T5810. Installation 9
Item number
-
6
7
Method
AC winding
Part name
Field-protected winding (except item 3)
Field winding of a circular rotor formed with a DC primary magnet
Running ring of a permanent short circuit
Non-insulated winding of a permanent short circuit, core and other parts not in contact with the winding
Iron core and other parts connected to the winding
Collector ring
Terminals connected to an external conductor
With silver protective layer
With tin anti-corrosion layer
Amendment to the energy-saving limit value shall be in accordance with the provisions of GB/T75S h
60
70
B grade
R
70
70
so
Th
75
90
F grade
K
95
95
100
The temperature rise of these components shall not, in any case, cause dangerous damage to the insulation or other materials themselves or the adjacent insulation. 70
70
60
50
90
80
When using additive measurement for AC, the limit value can be higher than that of the induction method. The temperature rise of the induction channel is limited to that measured by an energy-saving thermometer. The temperature rise limit is not allowed only when the collector ring adopts insulation suitable for the limit value. However, if the collector ring is close to the winding, its temperature rise should not exceed the limit value of the insulation grade used in the adjacent group. Th is the thermometer method, R is the resistance method.
10
Item number
2
3
Part name New
Generator electromechanical complete winding and auxiliary group For machine research Generator electric drive condenser group For auxiliary burning
Generator excitation fuse and dynamic magnetic equipment and the part connected with the excitation cable group For the part connected with the machine light in the load device For the part connected with the porcelain group For the machine light and between each phase Note: This test is not performed on the power conductor and the power device. 4.5.18 Moisture resistance performance
Test other voltage (modified value)
1000V+2Us1500V
1000V+2 Ux(L lower than 1500 V
10 pieces of rated starting inductance, the unit lower than 1500V1000V+2U but the component lower than 1500V
The generator and its excitation device shall have the current damp performance, and after 55℃, 6 hours of alternating damp heat test, the following requirements shall be met. The damp performance of the automatic regulator shall comply with the provisions of JB/T5793: 4.5.18.1
The insulation resistance between the machine winding and the winding shall not be less than the following values: R=2 x
—Rated power of generator, kVA:
Formula: p
u-
—Nominal voltage of generator winding, V:
R-—Insulation resistance of generator MQ
L
to0o
100
When the insulation material resistance value determined by the above formula is lower than 0.33M0, it shall be assessed as 0.33M0 (4)
4 Transient account adjustment rate (8)
When the generator and its excitation assembly are running without load at the rated speed and close to the predetermined electric length, 60% of the rated current is suddenly added, and the power factor does not exceed 0.4 (lag) ), the impedance of the three-phase symmetrical load is stable, and the above-mentioned load is unloaded. When the voltage drops, its transient voltage regulation rate should be no less than 15%; when the power range rises, its transient voltage regulation rate should be no more than 20%: when the generator terminal voltage recovers to rise and remains at the final stable voltage The time required within the range of 97%~103% should not exceed 1.5s: the transient electrical regulation rate is calculated according to formula (2) and formula (3): 8
a
：
Uaowa miat
UN-
UN
UN
→UN
0%
000||tt ||The maximum instantaneous voltage (peak value) of the shield when the load is suddenly unloaded, V: The minimum instantaneous voltage (beep value) after the load is suddenly added. V: Rated voltage (peak value), V
4.5.5 Waveform distortion
When the rated power is 25kVA and above, the rate of change of the electric waveform in the no-load line should be no more than 5%, and the rated power The sinusoidal change rate of the no-load line voltage waveform below 25kVA should not be greater than 10%: (2)
(3)
4.5.6 Asymmetric load
JB/T 4401.21999
When the generator is running under load, any phase cannot exceed the rated value, and the difference in current between each phase does not exceed 15% of the rated current. It should be able to work for a long time, and its temperature rise should comply with 4.5 .14 ??stipulates that at this time, the difference between the line power tower maximum (or ground minimum) value and the three-phase line power original average value should not exceed 5% of the two-phase line voltage average value
4.5.7 Overspeed|| tt||The generator should be able to withstand 120% rated speed for 2 minutes under load conditions without causing damage or harmful deformation. 4.5.8 Low-occurrence overcurrent
The generator and its excitation and isolation device should be able to withstand accidental overcurrent of 150% of the rated current in the hot state. It lasts for 2 minutes. At this time, the terminal current [1 is maintained at the rated value as much as possible, the power factor is 0.5 (lag), and no damage or harmful deformation occurs. 4.5.9 Overload
The generator and its excitation devices are in In the hot state, it should be able to operate at u% rated current; 1. This does not specifically depend on the temperature rise of the motor. Damage and harmful deformation may occur if possible.
4.5.10 Sudden short-circuit current
The generator is No-load rated power station, operating at rated frequency, two phases of H are short-circuited at the same time. At this time, the peak value of the short-circuit current should not exceed 15 times the rated current peak value or 21 times the effective value
4.5.11 Sudden short-circuit rupture strength Test
The three-phase over-circuit mechanical expansion test of the generator will only be carried out if the user makes clear requirements when ordering: If there is no other current decision, the test should be carried out under the motor load and rated voltage. The circuit lasts for 3$. There should be no harmful deformation after the test, and it should be able to withstand the electrical resistance test 4.5.12 Thermal circuit current maintenance capability
The generator and its excitation device should be at least Can maintain an effective circuit current of 3 times the rated current for 2s4.5.13 Parallel operation
For generators with parallel requirements, they should be able to operate in parallel stably. Each generator operating in parallel, when the load is within the total rated When the load changes within the range of 20% to 100%, the difference in reactive power distribution between the actual reactive load of each generator and the total reactive load calculated according to the rated proportional distribution value of each generator should not be greater than the greater of the following values. Minimum value: a) ±10% of the rated reactive power of the Zhengda generator: b) ±25% of the rated reactive power of the minimum generator: 4.5.14 Temperature rise
4.5.14.1 Generator and its excitation device When rated at an ambient temperature of 50°C, the temperature values ??of each part should comply with the requirements in Table 9. 4.5.14.2 The bearing temperature shall not exceed 90℃, 4.5.15 Insulation resistance
The cold insulation resistance of the motor winding shall not be less than 5M0, and the hot insulation resistance shall not be less than 2M04.5.16 Withstand voltage performance||tt ||The connection between the generator and its excitation device and the ground and windings should be able to withstand the voltage test specified in Table 10 for [min] without breakdown.
4.5.17 Inter-spacing impact voltage withstand performance
The generator winding should be subjected to the main insulation test withstand voltage: the peak loss of the sensitive micro-winding generator insulation test According to the provisions of JB/T9615.2; the insulation impact test voltage of the formed winding generator is in accordance with the provisions of JB/T5811: Generator acid field winding 6
JB/T4401.2—1999
Q. The electrical limit value of the insulation test shall be in accordance with the provisions of JB/T5810. Installation 9
item number
-
6
7
method
AC winding
part name|| tt||Avoiding field winding (excluding Liao item 3)
Use DC original magnet, Yao group the magnetic field winding of the cinnamon-shaped rotor in human feelings
The running edge of Shuijiuqiao Road| |tt||Permanently short-circuited uninsulated core, core and other parts not in contact with the winding
Iron core and other parts fused with the winding
Slip ring||tt| |Connected to external hysteretic insulating paint conductor machine
Terminal block
With silver-assisted creation layer
With tin anti-corrosion layer
Correction of energy gain rise limit According to GB/T75S, Th
60
70
B grade
R
70
70
so
Th
75
90
F grade
K
95
95
100| |tt||The temperature rise of these parts should in no case be such that there is a risk of damage to themselves or to adjacent insulation or other materials as low as 70
70
60|| tt | | 50 | | tt | | 90 | | tt | | 80 | have to. The temperature rise limit is only allowed when the collector ring adopts insulation suitable for the limit value. However, if the collector ring is close to the winding, its temperature rise should not exceed the insulation value of the adjacent set. The limit value of the ignition grade Th is the thermometer method, R is the electric resistance method
10
item number
2
3
item name new| |tt||Generator electromechanical winding and auxiliary assembly, generator electric drive assembly, auxiliary ignition
The engine excitation assembly and moving magnet assembly are connected to the excitation cable assembly For the connected parts of the telegraph porcelain group in the electromechanical and optical load-bearing device, for the electromechanical and optical components and between the phases. Note: This test is not required for conductor devices and electrical devices. 4.5.18 Moisture resistance performance
test other pressure (with Change the value
1000V+2Us1500V
1000V+2 Ux(L low 1500 V
10 pieces of starter inductor, the low value is 1500V|| tt||The generator and its excitation device should have pre-tide performance. After passing the 55℃, 6-period alternating humidity and heat test, the following requirements should be met. The tide-fed performance of the automatic electric regulator should comply with the provisions of JB/T5793: 4.5 .18.1
The insulation resistance value between the weaving machine and the weaving machine should not be lower than the following value: R=2 ||Formula: p
u-
The nominal voltage of the generator winding is low, V:
R---The insulation resistance of the generator MQ
L|| tt||to0o
100
When the resistance value of the insulating material determined according to the above formula is lower than 0.33M0, it shall be assessed as 0.33M0 (4)
4 Transient account adjustment rate (8)
When the generator and its excitation assembly are running without load at the rated speed and close to the predetermined electric length, 60% of the rated current is suddenly added, and the power factor does not exceed 0.4 (lag) ), the impedance of the three-phase symmetrical load is stable, and the above-mentioned load is unloaded. When the voltage drops, its transient voltage regulation rate should be no less than 15%; when the power range rises, its transient voltage regulation rate should be no more than 20%: when the generator terminal voltage recovers to rise and remains at the final stable voltage The time required within the range of 97%~103% should not exceed 1.5s: the transient electrical regulation rate is calculated according to formula (2) and formula (3): 8
a
：
Uaowa miat
UN-
UN
UN
→UN
0%
000||tt ||The maximum instantaneous voltage (peak value) of the shield when the load is suddenly unloaded, V: The minimum instantaneous voltage (beep value) after the load is suddenly added. V: Rated voltage (peak value), V
4.5.5 Waveform distortion
When the rated power is 25kVA and above, the rate of change of the electric waveform in the no-load line should be no more than 5%, and the rated power The sinusoidal change rate of the no-load line voltage waveform below 25kVA should not be greater than 10%: (2)
(3)
4.5.6 Asymmetric load
JB/T 4401.21999
When the generator is running under load, any phase cannot exceed the rated value, and the difference in current between each phase does not exceed 15% of the rated current. It should be able to work for a long time, and its temperature rise should comply with 4.5 .14 ??stipulates that at this time, the difference between the line power tower maximum (or ground minimum) value and the three-phase line power original average value should not exceed 5% of the two-phase line voltage average value
4.5.7 Overspeed|| tt||The generator should be able to withstand 120% rated speed for 2 minutes under load conditions without causing damage or harmful deformation. 4.5.8 Low-occurrence overcurrent
The generator and its excitation and isolation device should be able to withstand accidental overcurrent of 150% of the rated current in the hot state. It lasts for 2 minutes. At this time, the terminal current [1 is maintained at the rated value as much as possible, the power factor is 0.5 (lag), and no damage or harmful deformation occurs. 4.5.9 Overload
The generator and its excitation devices are in In the hot state, it should be able to operate at u% rated current; 1. This does not specifically depend on the temperature rise of the motor. Damage and harmful deformation may occur if possible.
4.5.10 Sudden short-circuit current
The generator is No-load rated power station, operating at rated frequency, two phases of H are short-circuited at the same time. At this time, the peak value of the short-circuit current should not exceed 15 times the rated current peak value or 21 times the effective value
4.5.11 Sudden short-circuit rupture strength Test
The three-phase over-circuit mechanical expansion test of the generator will only be carried out if the user makes clear requirements when ordering: If there is no other current decision, the test should be carried out under the motor load and rated voltage. The circuit lasts for 3$. There should be no harmful deformation after the test, and it should be able to withstand the electrical resistance test 4.5.12 Thermal circuit current maintenance capability
The generator and its excitation device should be at least Can maintain an effective circuit current of 3 times the rated current for 2s4.5.13 Parallel operation
For generators with parallel requirements, they should be able to stably operate in parallel. When the load of each generator operating in parallel is within the total rated When the load changes within the range of 20% to 100%, the difference in reactive power distribution between the actual reactive load of each generator and the total reactive load calculated according to the rated proportional distribution value of each generator should not be greater than the greater of the following values. Minimum value: a) ±10% of the rated reactive power of the Zhengda generator: b) ±25% of the rated reactive power of the minimum generator: 4.5.14 Temperature rise
4.5.14.1 Generator and its excitation device When rated at an ambient temperature of 50°C, the temperature values ??of each part should comply with the requirements in Table 9. 4.5.14.2 The bearing temperature shall not exceed 90℃, 4.5.15 Insulation resistance
The cold insulation resistance of the motor winding shall not be less than 5M0, and the hot insulation resistance shall not be less than 2M04.5.16 Withstand voltage performance||tt ||The connection between the generator and its excitation device and the ground and windings should be able to withstand the voltage test specified in Table 10 for [min] without breakdown.
4.5.17 Inter-spacing impulse withstand voltage performance
According to the provisions of JB/T9615.2; the insulation impact test voltage of the formed winding generator is in accordance with the provisions of JB/T5811: Generator acid field winding 6
JB/T4401.2—1999
The electrical limit value of the insulation test shall be in accordance with the provisions of JB/T5810. Installation 9
item number
-
6
7
method
AC winding
part name|| tt||Avoiding field winding (excluding Liao item 3)
Use DC original magnet, Yao group the magnetic field winding of the cinnamon-shaped rotor in human feelings
The running edge of Shuijiuqiao Road| |tt||Permanently short-circuited uninsulated core, core and other parts not in contact with the winding
Iron core and other parts fused with the winding
Slip ring||tt| |Connected to external hysteretic insulating paint conductor machine
Terminal block
With silver-assisted creation layer
With tin anti-corrosion layer
Correction of energy gain rise limit According to GB/T75S, Th
60
70
Class B
R
70
70
so
Th
75
90
F grade
K
95
95
100| |tt||The temperature rise of these parts should in no case be such that there is a risk of damage to themselves or to adjacent insulation or other materials as low as 70
70
60|| tt | | 50 | | tt | | 90 | | tt | | 80 | have to. The temperature rise limit is only allowed when the collector ring adopts insulation suitable for the limit value. However, if the collector ring is close to the winding, its temperature rise should not exceed the insulation value of the adjacent set. The limit value of the ignition grade Th is the thermometer method, R is the electric resistance method
10
Item number
2
3
Item name New| |tt||Generator electromechanical winding and auxiliary assembly, generator electric drive assembly, auxiliary ignition
The engine excitation assembly and moving magnet assembly are connected to the excitation cable assembly For the connected parts of the telegraph porcelain group in the electromechanical and optical load-bearing device, for the electromechanical and optical components and between the phases. Note: This test is not required for conductor devices and electrical devices. 4.5.18 Moisture resistance performance
test other pressure (with Change the value
1000V+2Us1500V
1000V+2 Ux(L low 1500 V
10 pieces of starter inductor, the low value is 1500V|| tt||The generator and its excitation device should have pre-tide performance. After passing the 55°C, 6-period alternating humidity and heat test, the following requirements should be met. The tide-fed performance of the automatic electric regulator should comply with the provisions of JB/T5793: 4.5 .18.1
The insulation resistance value between the weaving machine and the weaving machine should not be lower than the following value: R=2 ||Formula: p
u-
The nominal voltage of the generator winding is low, V:
R---The insulation resistance of the generator MQ
L|| tt||to0o
100
When the resistance value of the insulating material determined according to the above formula is lower than 0.33M0, it shall be assessed as 0.33M0 (4)
5s: The transient electrical regulation rate is calculated according to formula (2) and formula (3): 8
a
Formula:
Uaowa miat
UN-||tt ||UN
UN
→UN
0%
000
Maximum instantaneous power/music (peak value) of sudden unloading load shield, V: Minimum instantaneous voltage (beep value) after a sudden load is applied. V: Rated voltage (peak value), V
4.5.5 Waveform distortion
When the rated power is 25kVA and above, the rate of change of the electric waveform in the no-load line should be no more than 5%, and the rated power The sinusoidal change rate of the no-load line voltage waveform below 25kVA should not be greater than 10%: (2)
(3)
4.5.6 Asymmetric load
JB/T 4401.21999
When the generator is running under load, any phase cannot exceed the rated value, and the difference in current between each phase does not exceed 15% of the rated current. It should be able to work for a long time, and its temperature rise should comply with 4.5 .14 ??stipulates that at this time, the difference between the line power tower maximum (or ground minimum) value and the three-phase line power original average value should not exceed 5% of the two-phase line voltage average value
4.5.7 Overspeed|| tt||The generator should be able to withstand 120% rated speed for 2 minutes under load conditions without causing damage or harmful deformation. 4.5.8 Low-occurrence overcurrent
The generator and its excitation and isolation device should be able to withstand accidental overcurrent of 150% of the rated current in the hot state. It lasts for 2 minutes. At this time, the terminal current [1 is maintained at the rated value as much as possible, the power factor is 0.5 (lag), and no damage or harmful deformation occurs. 4.5.9 Overload
The generator and its excitation devices are in In the hot state, it should be able to operate at u% rated current; 1. This does not specifically depend on the temperature rise of the motor. Damage and harmful deformation may occur if possible.
4.5.10 Sudden short-circuit current
The generator is No-load rated power station, operating at rated frequency, two phases of H are short-circuited at the same time. At this time, the peak value of the short-circuit current should not exceed 15 times the rated current peak value or 21 times the effective value
4.5.11 Sudden short-circuit rupture strength Test
The three-phase over-circuit mechanical expansion test of the generator will only be carried out if the user makes clear requirements when ordering: If there is no other current decision, the test should be carried out under the motor load and rated voltage. The circuit lasts for 3$. There should be no harmful deformation after the test, and it should be able to withstand the electrical resistance test 4.5.12 Thermal circuit current maintenance capability
The generator and its excitation device should be at least Can maintain an effective circuit current of 3 times the rated current for 2s4.5.13 Parallel operation
For generators with parallel requirements, they should be able to operate in parallel stably. Each generator operating in parallel, when the load is within the total rated When the load changes within the range of 20% to 100%, the difference in reactive power distribution between the actual reactive load of each generator and the total reactive load calculated according to the rated proportional distribution value of each generator should not be greater than the greater of the following values. Minimum value: a) ±10% of the rated reactive power of the Zhengda generator: b) ±25% of the rated reactive power of the minimum generator: 4.5.14 Temperature rise
4.5.14.1 Generator and its excitation device When rated at an ambient temperature of 50°C, the temperature values ??of each part should comply with the requirements in Table 9. 4.5.14.2 The bearing temperature shall not exceed 90℃, 4.5.15 Insulation resistance
The cold insulation resistance of the motor winding shall not be less than 5M0, and the hot insulation resistance shall not be less than 2M04.5.16 Withstand voltage performance||tt ||The connection between the generator and its excitation device and the ground and windings should be able to withstand the voltage test specified in Table 10 for [min] without breakdown.
4.5.17 Inter-spacing impact voltage withstand performance
The generator winding should be subjected to the main insulation test withstand voltage: the peak loss of the sensitive micro-winding generator insulation test According to the provisions of JB/T9615.2; the insulation impact test voltage of the formed winding generator is in accordance with the provisions of JB/T5811: Generator acid field winding 6
JB/T4401.2—1999
The electrical limit value of the insulation test shall be in accordance with the provisions of JB/T5810. Installation 9
item number
-
6
7
method
AC winding
part name|| tt||Avoiding field winding (excluding Liao item 3)
Use DC original magnet, Yao group the magnetic field winding of the cinnamon-shaped rotor in human feelings
The running edge of Shuijiuqiao Road| |tt||Permanently short-circuited uninsulated core, core and other parts not in contact with the winding
Iron core and other parts fused with the winding
Slip ring||tt| |Connected to external hysteretic insulating paint conductor machine
Terminal block
With silver-assisted creation layer
With tin anti-corrosion layer
Correction of energy gain rise limit According to GB/T75S, Th
60
70
Class B
R
70
70
so
Th
75
90
F grade
K
95
95
100| |tt||The temperature rise of these parts should in no case be such that there is a risk of damage to themselves or to adjacent insulation or other materials as low as 70
70
60|| tt | | 50 | | tt | | 90 | | tt | | 80 | have to. The temperature rise limit is only allowed when the collector ring adopts insulation suitable for the limit value. However, if the collector ring is close to the winding, its temperature rise should not exceed the insulation value of the adjacent set. The limit value of the ignition grade Th is the thermometer method, R is the electric resistance method
10
Item number
2
3
Item name New| |tt||Generator electromechanical winding and auxiliary assembly, generator electric drive assembly, auxiliary ignition
The engine excitation assembly and moving magnet assembly are connected to the excitation cable assembly For the connected parts of the telegraph porcelain group in the electromechanical and optical load-bearing device, for the electromechanical and optical components and between the phases. Note: This test is not required for conductor devices and electrical devices. 4.5.18 Moisture resistance performance
test other pressure (with Change the value
1000V+2Us1500V
1000V+2 Ux(L low 1500 V
10 pieces of starter inductor, the low value is 1500V|| tt||The generator and its excitation device should have pre-tidal performance. After passing the 55℃, 6-period alternating humidity and heat test, the following requirements should be met. The automatic electric regulator's tide-fed performance should comply with the provisions of JB/T5793: 4.5 .18.1
The insulation resistance value between the weaving machine and the weaving machine should not be lower than the following value: R=2 ||Formula: p
u-
The nominal voltage of the generator winding is low, V:
R---The insulation resistance of the generator MQ
L|| tt||to0o
100
When the resistance value of the insulating material determined according to the above formula is lower than 0.33M0, it shall be assessed as 0.33M0 (4)
5s: The transient electrical regulation rate is calculated according to formula (2) and formula (3): 8
a
Formula:
Uaowa miat
UN-||tt ||UN
UN
→UN
0%
000
Maximum instantaneous power/music (peak value) of sudden unloading load shield, V: Minimum instantaneous voltage (beep value) after a sudden load is applied. V: Rated voltage (peak value), V
4.5.5 Waveform distortion
When the rated power is 25kVA and above, the rate of change of the electric waveform in the no-load line should be no more than 5%, and the rated power The sinusoidal change rate of the no-load line voltage waveform below 25kVA should not be greater than 10%: (2)
(3)
4.5.6 Asymmetric load
JB/T 4401.21999
When the generator is running under load, any phase cannot exceed the rated value, and the difference in current between each phase does not exceed 15% of the rated current. It should be able to work for a long time, and its temperature rise should comply with 4.5 .14 ??stipulates that at this time, the difference between the line power tower maximum (or ground minimum) value and the three-phase line power original average value should not exceed 5% of the two-phase line voltage average value
4.5.7 Overspeed|| tt||The generator should be able to withstand 120% rated speed for 2 minutes under load conditions without causing damage or harmful deformation. 4.5.8 Low-occurrence overcurrent
The generator and its excitation and isolation device should be able to withstand accidental overcurrent of 150% of the rated current in the hot state. It lasts for 2 minutes. At this time, the terminal current [1 is maintained at the rated value as much as possible, the power factor is 0.5 (lag), and no damage or harmful deformation occurs. 4.5.9 Overload
The generator and its excitation devices are in In the hot state, it should be able to operate at u% rated current; 1. This does not specifically depend on the temperature rise of the motor. Damage and harmful deformation may occur if possible.
4.5.10 Sudden short-circuit current
The generator is No-load rated power station, operating at rated frequency, two phases of H are short-circuited at the same time. At this time, the peak value of the short-circuit current should not exceed 15 times the rated current peak value or 21 times the effective value
4.5.11 Sudden short-circuit rupture strength Test
The three-phase over-circuit mechanical expansion test of the generator will only be carried out if the user makes clear requirements when ordering: If there is no other current decision, the test should be carried out under the motor load and rated voltage. The circuit lasts for 3$. There should be no harmful deformation after the test, and it should be able to withstand the electrical resistance test 4.5.12 Thermal circuit current maintenance capability
The generator and its excitation device should be at least Can maintain an effective circuit current of 3 times the rated current for 2s4.5.13 Parallel operation
For generators with parallel requirements, they should be able to operate in parallel stably. Each generator operating in parallel, when the load is within the total rated When the load changes within the range of 20% to 100%, the difference in reactive power distribution between the actual reactive load of each generator and the total reactive load calculated according to the rated proportional distribution value of each generator should not be greater than the greater of the following values. Minimum value: a) ±10% of the rated reactive power of the Zhengda generator: b) ±25% of the rated reactive power of the minimum generator: 4.5.14 Temperature rise
4.5.14.1 Generator and its excitation device When rated at an ambient temperature of 50°C, the temperature values ??of each part should comply with the requirements in Table 9. 4.5.14.2 The bearing temperature shall not exceed 90℃, 4.5.15 Insulation resistance
The cold insulation resistance of the motor winding shall not be less than 5M0, and the hot insulation resistance shall not be less than 2M04.5.16 Withstand voltage performance||tt ||The connection between the generator and its excitation device and the ground and windings should be able to withstand the voltage test specified in Table 10 for [min] without breakdown.
4.5.17 Inter-spacing impulse withstand voltage performance
According to the provisions of JB/T9615.2; the insulation impact test voltage of the formed winding generator is in accordance with the provisions of JB/T5811: Generator acid field winding 6
JB/T4401.2—1999
The electrical limit value of the insulation test shall be in accordance with the provisions of JB/T5810. Installation 9
item number
-
6
7
method
AC winding
part name|| tt||Avoiding field winding (excluding Liao item 3)
Use DC original magnet, Yao group the magnetic field winding of the cinnamon-shaped rotor in human feelings
The running edge of Shuijiuqiao Road| |tt||Permanently short-circuited uninsulated core, core and other parts not in contact with the winding
Iron core and other parts fused with the winding
Slip ring||tt| |Connected to external hysteretic insulating paint conductor machine
Terminal block
With silver-assisted creation layer
With tin anti-corrosion layer
Correction of energy gain rise limit According to GB/T75S, Th
60
70
Class B
R
70
70
so
Th
75
90
F grade
K
95
95
100| |tt||The temperature rise of these parts should in no case be such that there is a risk of damage to themselves or to adjacent insulation or other materials as low as 70
70
60|| tt | | 50 | | tt | | 90 | | tt | | 80 | have to. The temperature rise limit is only allowed when the collector ring adopts insulation suitable for the limit value. However, if the collector ring is close to the winding, its temperature rise should not exceed the insulation value of the adjacent set. The limit value of the ignition grade Th is the thermometer method, R is the electric resistance method
10
Item number
2
3
Item name New| |tt||Generator electromechanical winding and auxiliary assembly, generator electric drive assembly, auxiliary ignition
The engine excitation assembly and moving magnet assembly are connected to the excitation cable assembly For the connected parts of the telegraph porcelain group in the electromechanical and optical load-bearing device, for the electromechanical and optical components and between the phases. Note: This test is not required for conductor devices and electrical devices. 4.5.18 Moisture resistance performance
test other pressure (with Change the value
1000V+2Us1500V
1000V+2 Ux(L low 1500 V
10 pieces of starter inductor, the low value is 1500V|| tt||The generator and its excitation device should have pre-tide performance. After passing the 55℃, 6-period alternating humidity and heat test, the following requirements should be met. The tide-fed performance of the automatic electric regulator should comply with the provisions of JB/T5793: 4.5 .18.1
The insulation resistance value between the weaving machine and the weaving machine should not be lower than the following value: R=2 ||Formula: p
u-
The nominal voltage of the generator winding is low, V:
R---The insulation resistance of the generator MQ
L|| tt||to0o
100
When the resistance value of the insulating material determined according to the above formula is lower than 0.33M0, it shall be assessed as 0.33M0 (4)
9.
The generator and its exciter devices should be able to operate at u% of the rated current in a hot state; 1. This does not specifically depend on the temperature rise of the motor, which may cause damage and harmful deformation. ||tt ||4.5.10 Sudden short-circuit current
The generator is running at the rated power station and rated frequency at no load, and the two phases H are short-circuited at the same time. At this time, the peak value of the short-circuit current should not exceed 15 times the rated current peak value or the effective value. 21 times
4.5.11 Sudden short-circuit bursting strength test
The three-phase over-circuit mechanical expansion test of the generator will only be carried out when the user makes clear requirements when ordering: If not Others are currently stipulated that the test should be carried out under the motor load and rated voltage, the circuit duration is 3$, there should be no harmful deformation after the test, and it should be able to withstand the electric resistance test 4.5.12 Thermal circuit current maintenance capability ||tt| |The generator and its excitation device can maintain an effective circuit current of at least 3 times the rated current under steady-state circuit conditions, and operate in parallel for 2s4.5.13
For generators with parallel requirements, they should be able to be stably connected in parallel When the load of each generator running in parallel changes within the range of 20% to 100% of the total rated load, the actual reactive load of each generator and the total reactive load are distributed according to the rated proportion of each generator. The calculated reactive power distribution difference should not be greater than the smaller of the following values: a) ±10% of the rated reactive power of the Zhengda generator: b) ±25% of the rated reactive power of the smallest generator: 4.5.14 Temperature rise
4.5.14.1 When the generator and its excitation device are rated to operate at an ambient temperature of 50°C, the temperature values ??of each part should comply with the requirements in Table 9. 4.5.14.2 The bearing temperature shall not exceed 90℃, 4.5.15 Insulation resistance
The cold insulation resistance of the motor winding shall not be less than 5M0, and the hot insulation resistance shall not be less than 2M04.5.16 Withstand voltage performance||tt ||The connection between the generator and its excitation device and the ground and windings should be able to withstand the voltage test specified in Table 10 for [min] without breakdown.
4.5.17 Inter-spacing impact voltage withstand performance
The generator winding should be subjected to the main insulation test withstand voltage: the peak loss of the sensitive micro-winding generator insulation test According to the provisions of JB/T9615.2; the insulation impact test voltage of the formed winding generator is in accordance with the provisions of JB/T5811: Generator acid field winding 6
JB/T4401.2—1999
Q. The electrical limit value of the insulation test shall be in accordance with the provisions of JB/T5810. Installation 9
item number
-
6
7
method
AC winding
part name|| tt||Avoiding field winding (excluding Liao item 3)
Use DC original magnet, Yao group the magnetic field winding of the cinnamon-shaped rotor in human feelings
The running edge of Shuijiuqiao Road| |tt||Permanently short-circuited uninsulated core, core and other parts not in contact with the winding
Iron core and other parts fused with the winding
Slip ring||tt| |Connected to external hysteretic insulating paint conductor machine
Terminal block
With silver-assisted creation layer
With tin anti-corrosion layer
Correction of energy gain rise limit According to GB/T75S, Th
60
70
Class B
R
70
70
so
Th
75
90
F grade
K
95
95
100| |tt||The temperature rise of these parts should in no case be such that there is a risk of damage to themselves or to adjacent insulation or other materials as low as 70
70
60|| tt | | 50 | | tt | | 90 | | tt | | 80 | have to. The temperature rise limit is only allowed when the collector ring adopts insulation suitable for the limit value. However, if the collector ring is close to the winding, its temperature rise should not exceed the insulation value of the adjacent set. The limit value of the ignition grade Th is the thermometer method, R is the electric resistance method
10
Item number
2
3
Item name New| |tt||Generator electromechanical winding and auxiliary assembly, generator electric drive assembly, auxiliary ignition
The engine excitation assembly and moving magnet assembly are connected to the excitation cable assembly For the connected parts of the telegraph porcelain group in the electromechanical and optical load-bearing device, for the electromechanical and optical components and between the phases. Note: This test is not required for conductor devices and electrical devices. 4.5.18 Moisture resistance performance
test other pressure (with Change the value
1000V+2Us1500V
1000V+2 Ux(L low 1500 V
10 pieces of starter inductor, the low value is 1500V|| tt||The generator and its excitation device should have pre-tide performance. After passing the 55°C, 6-period alternating humidity and heat test, the following requirements should be met. The tide-fed performance of the automatic electric regulator should comply with the provisions of JB/T5793: 4.5 .18.1
The insulation resistance value between the weaving machine and the weaving machine should not be lower than the following value: R=2 ||Formula: p
u-
The nominal voltage of the generator winding is low, V:
R---The insulation resistance of the generator MQ
L|| tt||to0o
100
When the resistance value of the insulating material determined according to the above formula is lower than 0.33M0, it shall be assessed as 0.33M0 (4)
9.
The generator and its exciter devices should be able to operate at u% of the rated current in a hot state; 1. This does not specifically depend on the temperature rise of the motor, which may cause damage and harmful deformation. ||tt ||4.5.10 Sudden short-circuit current
The generator is running at the rated power station and rated frequency at no load, and the two phases H are short-circuited at the same time. At this time, the peak value of the short-circuit current should not exceed 15 times the rated current peak value or the effective value. 21 times
4.5.11 Sudden short-circuit bursting strength test
The three-phase over-circuit mechanical expansion test of the generator will only be carried out when the user makes clear requirements when ordering: If not Others are currently stipulated that the test should be carried out under the motor load and rated voltage, the circuit duration is 3$, there should be no harmful deformation after the test, and it should be able to withstand the electric resistance test 4.5.12 Thermal circuit current maintenance capability ||tt| |The generator and its excitation device can maintain an effective circuit current of at least 3 times the rated current under steady-state circuit conditions, and operate in parallel for 2s4.5.13
For generators with parallel requirements, they should be able to be stably connected in parallel When the load of each generator running in parallel changes within the range of 20% to 100% of the total rated load, the actual reactive load of each generator and the total reactive load are distributed according to the rated proportion of each generator. The calculated reactive power distribution difference should not be greater than the smaller of the following values: a) ±10% of the rated reactive power of the Zhengda generator: b) ±25% of the rated reactive power of the smallest generator: 4.5.14 Temperature rise
4.5.14.1 When the generator and its excitation device are rated to operate at an ambient temperature of 50°C, the temperature values ??of each part should comply with the requirements in Table 9. 4.5.14.2 The bearing temperature shall not exceed 90℃, 4.5.15 Insulation resistance
The cold insulation resistance of the motor winding shall not be less than 5M0, and the hot insulation resistance shall not be less than 2M04.5.16 Withstand voltage performance||tt ||The connection between the generator and its excitation device and the ground and windings should be able to withstand the voltage test specified in Table 10 for [min] without breakdown.
4.5.17 Inter-spacing impact voltage withstand performance
The generator winding should be subjected to the main insulation test withstand voltage: the peak loss of the sensitive micro-winding generator insulation test According to the provisions of JB/T9615.2; the insulation impact test voltage of the formed winding generator is in accordance with the provisions of JB/T5811: Generator acid field winding 6
JB/T4401.2—1999
The electrical limit value of the insulation test shall be in accordance with the provisions of JB/T5810. Installation 9
item number
-
6
7
method
AC winding
part name|| tt||Avoiding field winding (excluding Liao item 3)
Use DC original magnet, Yao group the magnetic field winding of the cinnamon-shaped rotor in human feelings
The running edge of Shuijiuqiao Road| |tt||Permanently short-circuited uninsulated core, core and other parts not in contact with the winding
Iron core and other parts fused with the winding
Slip ring||tt| |Connected to external hysteretic insulating paint conductor machine
Terminal block
With silver-assisted creation layer
With tin anti-corrosion layer
Correction of energy gain rise limit According to GB/T7
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