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GB/T 12785-2014 (GBT 12785-2014)

Chinese standards (related to): 'GB/T 12785-2014'
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GB/T 12785-2014English995 Add to Cart 0--3 minutes. Auto immediate delivery. Test methods for submersible motor-pumps GB/T 12785-2014 Valid GBT 12785-2014
GB/T 12785-2002English1159 Add to Cart 6 days Test methods for submersible motor-pumps GB/T 12785-2002 Obsolete GBT 12785-2002
GB/T 12785-1991English1199 Add to Cart 6 days Test methods for submersible motor-pumps GB/T 12785-1991 Obsolete GBT 12785-1991


   
BASIC DATA
Standard ID GB/T 12785-2014 (GB/T12785-2014)
Description (Translated English) Test methods for submersible motor-pumps
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard B91
Classification of International Standard 65.060.35
Word Count Estimation 73,711
Date of Issue 2014/7/24
Date of Implementation 2015/1/1
Older Standard (superseded by this standard) GB/T 12785-2002
Quoted Standard GB 755-2008; GB/T 1032; GB 1971; GB/T 3214; GB/T 3216; GB/T 9651; GB/T 10068; GB/T 10069.1; GB 10069.3; GB/T 22714; GB/T 22715; GB/T 22719.1; GB/T 22719.2
Drafting Organization Chinese Academy of Agricultural Mechanization Sciences
Administrative Organization National Agricultural machinery Standardization Technical Committee
Regulation (derived from) National Standards Bulletin No. 19, 2014
Proposing organization China Machinery Industry Federation
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the submersible pump performance testing and acceptance (or taxed) method. This standard applies to all types of submersible pump (hereinafter referred to as "pump"), including various types of submersible motors and submersible pu


GB/T 12785-2014: PDF in English (GBT 12785-2014)
GB/T 12785-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.060.35
B 91
Replacing GB/T 12785-2002
Test methods for submersible motor-pumps
ISSUED ON: JULY 24, 2014
IMPLEMENTED ON: JANUARY 01, 2015
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Test and acceptance criteria ... 6 
4 Parameter measurement ... 21 
5 Test preparation ... 24 
6 No-load test of motor ... 27 
7 Thermal test of motor ... 32 
8 Load test of motor and performance test of pump ... 37 
9 Complete set test of unit ... 60 
10 Locked-rotor test of motor ... 64 
11 Determination of the maximum torque of motor ... 68 
12 Determination of the minimum torque of motor ... 71 
13 Withstand voltage test of motor ... 71 
14 Inter-turn insulation test of motor windings ... 73 
15 Measurement of motor noise ... 73 
16 Vibration measurement of motor ... 73 
17 Determination of axial force of submersible pump for well ... 74 
18 Other tests ... 76 
Appendix A (Informative) Calibration time interval for instruments ... 78 
Appendix B (Normative) Evaluation of measurement uncertainty ... 79 
Appendix C (Informative) Quantity, symbol, unit ... 112 
Appendix D (Informative) Converted to SI units ... 116 
References ... 118 
Test methods for submersible motor-pumps
1 Scope
This standard specifies the performance test and acceptance (or assessment)
methods of submersible motor-pumps.
This standard applies to all types of submersible motor-pumps (hereinafter
referred to as "motor-pumps"), including the test of all types of submersible
motors and submersible pumps.
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 standard.
GB 755-2008 Rotating electrical machines - Rating and performance
GB/T 1032 Test procedures for three-phase induction motors
GB 1971 Rotating electrical machines - Terminal markings and direction of
rotation
GB/T 3214 Methods for measurement of capacity of pump
GB/T 3216 Rotodynamic pumps - Hydraulic performance acceptance tests
- Grades 1, 2 and 3
GB/T 9651 Test procedures for single-phase induction motor
GB/T 10068 Mechanical vibration of certain machines with shaft heights 56
mm and higher - Measurement, evaluation and limits of vibration severity
GB/T 10069.1 Measurement of airborne noise emitted by rotating electrical
machines and the noise limits - Part 1: Method for the measurement of
airborne noise emitted by rotating electrical machines
GB 10069.3 Measurement of airborne noise emitted by rotating electrical
machines and the noise limits - Part 3: Noise limits
GB/T 22714 Test specifications of interturn insulation of form-wound winding
for AC low-voltage electrical machines
GB/T 22715 Impulse voltage withstand levels of form-wound stator coils for
rotating a. c. machines
GB/T 22719.1 Interturn insulation of random-wound winding for AC low-
voltage electrical machines - Part 1: Test methods
GB/T 22719.2 Interturn insulation of random-wound winding for AC low-
voltage electrical machines - Part 2: Test limits
3 Test and acceptance criteria
3.1 Guarantee
3.1.1 Guaranteed points
The guaranteed point of the pump shall be determined by the guaranteed flow
QG and the guaranteed head HG. The guaranteed point of the motor is
determined by the motor's nominal frequency fN, nominal voltage UN, nominal
power PN. The guaranteed value is the parameter value, that the motor-pump
shall guarantee, at the guaranteed point, which can be the standard specified
value, the design value or the agreed value during the acceptance test.
Note: The guaranteed points can be referred to as guaranteed, specified,
designed (or nominal), according to different occasions where the provisions
are used.
3.1.2 Guaranteed conditions
Unless otherwise specified, the acceptance test shall comply with the following
guaranteed conditions:
a) It shall use the test liquid, which is specified in 3.3.1, on a test bench,
which meets the methods, test devices, test conditions, which are
specified in this standard.
b) The performance of the pump, which shall be guaranteed, refers to the
performance between the pump inlet and outlet flanges. The pipeline and
accessories, on the outlet side of the pump, are not within the scope of
the guarantee.
c) The performance of the motor, which shall be guaranteed, refers to the
performance of the motor, which contains lead cable within 5 m. The
change in motor performance, which is caused by more than 5 m, is not
within the scope of the guarantee.
The test bench shall be provided by the manufacturer, OR it may be provided
The acceptance test is carried out, with the participation of the buyer’s
representative. The test items shall be negotiated by both parties to the contract.
The acceptance result shall be signed by the buyer’s witness.
3.2.3 Supervised spot check test
It is the random inspection test of quality, which is conducted by product quality
supervision and inspection agencies, as authorized by the competent
government departments at all levels of the country. The test content and items
shall be in accordance with the relevant product standards AND the relevant
documents of the product quality supervision and inspection agency. The test
shall comply with the requirements of this standard, be carried out on a certified
third-party's test bench OR a test bench of a manufacturer, which is approved
by the quality inspection agency.
3.3 Test conditions
3.3.1 Test liquid
The test medium shall be clean cold water OR a liquid, which has the same
chemical and physical properties as clean cold water. The characteristics of
"clean cold water" shall meet the requirements of GB/T 3216.
3.3.2 Test power supply
The test power supply shall meet the requirements of GB/T 1032.
3.3.3 Length of lead cable of test motor-pump
Unless otherwise specified, the cable length of the test motor-pump shall not
exceed 5 m.
3.3.4 Submerged depth of test motor-pump
The test shall be carried out with the motor-pump submerged in water. For
submersible motor-pumps, which are used in high-head wells, the pump head
can be partially submerged; the submerged depth shall ensure that cavitation
does not occur, during the test of the motor-pump.
3.3.5 Stability during the test
3.3.5.1 Operational stability
3.3.5.1.1 Concepts related to operational stability
The following concepts are involved, in determining whether the operation is
stable:
a) Signal average - Usually the measured signal has randomness. The signal
average is one of the statistical characteristics of random signals, which
is represented by the arithmetic average of n repeated measurements, in
an observation period T. The observation period T shall be long enough.
When determining T, it shall consider the longest response time of each
instrument, in the measurement system AND whether it fully reflects the
change characteristics of the measured value.
b) Fluctuations - The periodic or random changes of the signal, which is
output by the measurement system, AND the physical quantities, which
are derived from it around the average value over time, are called
fluctuations. If the measurement signal fluctuates greatly, due to the
structure or operation of the pump, it may use a buffer or damper, that can
reduce the fluctuation to the value range, which is given in Table 1, in the
measuring instrument or its connecting pipeline. However, it shall be noted
that the measures taken cannot affect the "distortion" of the average value
of the readings; it shall provide a fluctuation integral, within at least one
complete fluctuation cycle. The reduction of the fluctuation range by the
buffer shall be bidirectional symmetrical and linear.
c) Variation - The change in the average value of the output signal of the
measurement system and its derived physical quantity.
d) Reading - The visible observation value, which can be recorded by the
output signal of the measuring system.
1) "Quasi-instantaneous" reading: The value, which is read in the shortest
possible time (but not shorter than the response time of the
measurement system).
2) "Average reading" of the signal: The average value of the signal, which
is directly given by a measuring instrument with integral function.
e) Reading group - The group of n “quasi-instantaneous” readings, which is
read during the observation period T. It can be used for statistical analysis
and calculation of data (such as the calculation of average, variance,
standard deviation).
Compared with the change of the average value, the fluctuation is fast......