GB/T 25389.2-2018 PDF English
US$260.00 · In stock · Download in 9 secondsGB/T 25389.2-2018: Wind turbines - Permanent magnet synchronous generator - Part 2: Testing methods Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 25389.2: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 25389.2-2018 | English | 260 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Wind turbines - Permanent magnet synchronous generator - Part 2: Testing methods
| Valid |
| GB/T 25389.2-2010 | English | 85 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Wind turbine low-speed permanent magnet synchronous generator -- Part 2: Testing methods
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 25389.2-2018
GB/T 25389.2-2018: Wind turbines - Permanent magnet synchronous generator - Part 2: Testing methods---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT25389.2-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.180
F 11
Replacing GB/T 25389.2-2010
Wind Turbines – Permanent Magnet Synchronous
Generator – Part 2.Testing Methods
Issued on. MAY 14, 2018
Implemented on. DECEMBER 01, 2018
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 6
4 Test Requirements... 6
5 Test Items... 7
Appendix A (Normative) Measuring of No-load Voltage-Temperature Curve of
Generator... 25
Appendix B (Informative) Determination Method of Single-Motor Thermal Test... 26
1 Scope
This Part of GB/T 25389 specifies the test methods for permanent magnet synchronous
generators for wind turbines connected to the grid through full power converters.
This Part applies to the tests of permanent magnet synchronous generators (hereinafter referred
to as generators) for wind turbines connected to the grid through full power converters. Other
types of generators can be used as a reference.
2 Normative References
The following documents are essential to the application of this Document. For the dated
documents, only the versions with the dates indicated are applicable to this Document; for the
undated documents, only the latest version (including all the amendments) is applicable to this
Document.
GB/T 755 Rotating electrical machines - Rating and performance
GB/T 1029 Test procedures for three-phase synchronous machines
GB/T 1032-2012 Test procedures for three-phase induction motors
GB/T 2423.16 Environmental testing for electric and electronic products - Part 2.Tests -
Test J and guidance. Mould growth
GB/T 2423.17 Environmental testing for electric and electronic products - Part 2.Test
method - Test Ka. Salt mist
GB/T 4942.1 Degrees of Protection Provided by the Integral Design of Rotating Electrical
Machined (IP Code)-Classification
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 755 and GB/T 1029
apply.
4 Test Requirements
4.1 Safety measures
Since the test process involves dangerous currents, voltages, magnetic fields and mechanical
forces, safety precautions shall be taken for all tests; and all tests shall be performed by
professionals with relevant qualifications.
4.2 Instruments and meters for measurement
The instruments and meters for measurement shall meet the following requirements.
4.3 Preparation for test
Before the test, the generator under test shall be in a normal state; the wiring shall be correct;
and the test circuit and equipment shall meet the requirements of the test.
5 Test Items
5.1 Determination of insulation resistance
5.1.1 Determination of insulation resistance of winding against casing, and between
windings
5.1.1.3 Measurement method
The measurement of the insulation resistance of the winding against the casing shall be carried
out in accordance with the provisions of GB/T 1029.The insulation resistance of the stator
winding and components shall be measured separately. Before the measurement, the external
components shall be reliably disconnected to avoid damage.
5.1.2 Determination of other insulation resistance
The methods for measuring other insulation resistances are as follows.
5.1.2.3 of GB/T 1032-2012;
5.2 Measurement of DC resistance of winding in actual cold state
5.3 Interturn withstand voltage test
The interturn withstand voltage test shall be carried out according to the methods specified in
GB/T 22715, GB/T 22719.1 and GB/T 22719.2.
5.4 Voltage withstand test
5.4.1 Test requirements
The withstand voltage test is carried out when the generator is at rest. Before the test, the
insulation resistance of the winding shall be measured. If overspeed and short-time overcurrent
tests are required, the test shall be performed after these tests. During the type test, the withstand
voltage test shall be carried out after the heat test and when the generator is close to the hot
state.
5.4.2 Test method
The withstand voltage test shall be carried out according to the method specified in GB/T 1029.
Other windings and embedded temperature detection components not participating in the test
shall be electrically connected to the iron core or the casing, and the casing shall be grounded.
If the neutral point of the winding is not easy to separate, the voltage shall be applied to the
winding at the same time.
5.5 Phase sequence check
5.5.1 Generator method
The motor under test operates as a generator, and the direction of rotation complies with the
design provisions. The motor line under test is connected to the phase sequence indicator to
determine the phase sequence of the motor under test.
5.5.2 Motor method
Use the calibrated power supply to drive the tested motor for motor operation, and the direction
of rotation shall comply with the design provisions.
5.9 No-load test
5.9.1 Determination of no-load characteristic curves of generators in cold state and hot
state (generator method)
5.10.5 Measurement of cooling medium temperature during heat test
5.10.5.1 Air-cooled motors
For motors cooled by ambient air, the embedded temperature detectors or several thermometers
distributed in the cooling air to enter the generator can be used for measurement. The
thermometer shall be placed 1m~2m away from the generator, and its spherical part
(temperature measuring part) shall be on the horizontal plane above the center of the generator
shaft; and shall prevent the influence of external radiation heat source and airflow, and take the
average value of the temperature value as the cooling medium temperature.
5.17.6 After the generator is reassembled, compare the no-load characteristics with the
generator method in 5.9.1.
5.17.7 After the sudden short-circuit test of the generator, the demagnetization of the permanent
magnet shall be checked.
Tractor Generator
5.18 Determination of starting resistance torque
5.18.1 Disk method
A disc with a known diameter is fixedly installed on the shaft extension of the generator; and a
force is applied in the tangential direction of the disc. The value of the applied force when the
disc starts to rotate is measured by a torque sensor. When the disc is rotated for one circle, the
product of the maximum reading and the disc radii is the starting resistance torque. There shall
be no less than 3 measuring points within a week.
5.18.2 Leverage method
A torque lever is fixedly installed in the vertical direction of the shaft extension of the generator.
The end of the lever is connected to a crane connected to a dynamometer or a spring balance.
Apply force in the tangential direction until the shaft extension starts to rotate; and read the
value of the applied force when it starts to rotate. The product of the maximum reading and the
effective length of the lever is the starting resistance torque.
5.19 Casing protection level test
The casing protection level test shall be carried out according to the test method specified in
GB/T 4942.1.
5.20 Damp heat test
The damp heat test shall be carried out according to the test method specified in GB/T 12665.
5.21 Salt spray test
The salt spray test shall be carried out according to the test method specified in GB/T 2423.17.
5.22 Mold test
The mold test shall be carried out according to the test method specified in GB/T 2423.16.
Appendix A
(Normative)
Measuring of No-load Voltage-Temperature Curve of Generator
A.1 Test purpose
Measure the relationship curve between permanent magnet and temperature.
A.2 Test method
The generator is driven by the tractor through the coupling to run at no-load and at the rated
speed, and the stator winding is open-circuited. Simulate the winding temperature θ from the
cold state of the generator to the stable state of temperature-rise; the temperature is no less than
5 points, including the reference temperature. Use a voltage measuring instrument to measure
the m-phase voltage U at the output terminal of the generator; and draw the no-load voltage
curve of the generator at different winding temperatures (see Figure A.1).
Figure A.1 -- Generator No-Load Potential Curve
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 25389.2-2018 be delivered?Answer: The full copy PDF of English version of GB/T 25389.2-2018 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 25389.2-2018_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 25389.2-2018_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 25389.2-2018 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB/T 25389.2-2018?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 25389.2-2018 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. How to buy and download a true PDF of English version of GB/T 25389.2-2018?A step-by-step guide to download PDF of GB/T 25389.2-2018_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 25389.2-2018".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|