GB/T 25409-2010 English PDF (GBT25409-2010)

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GB/T 25409-2010: Small-size submersible motor-pumps
GB/T 25409-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.060.35
B 91
Small-size submersible motor-pumps
ISSUED ON: NOVEMBER 10, 2010
IMPLEMENTED ON: MARCH 01, 2011
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Type, model, and basic parameters ... 5 
4 Technical requirements ... 17 
5 Test methods ... 24 
6 Inspection rules ... 25 
7 Marking, packaging, transportation, and storage ... 27 
Appendix A (Normative) Correction and determination of efficiency ... 30 
Small-size submersible motor-pumps
1 Scope
This Standard specifies the type, model, basic parameters, technical
requirements, test methods, inspection rules, marking, packaging,
transportation, and storage, etc. of small-size submersible motor-pumps.
This Standard applies to single-phase or three-phase, single-stage or multi-
stage small-size submersible motor-pumps (hereinafter referred to as motor-
pumps) with a power of 22 kW or less.
2 Normative references
The following documents contain provisions which, through reference in this
Standard, constitute provisions of this Standard. For the dated references, their
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest editions of these
documents are applicable. For undated reference documents, the latest
editions apply to this Standard.
GB/T 191 Packaging - Pictorial Marking for Handling of Goods (GB/T 191-
2008, ISO 780:1997, MOD)
GB 755 Rotating Electrical Machines - Rating and Performance (GB 755-
2008, IEC 60034-1:2004, IDT)
GB 1971 Rotating Electrical Machines - Terminal Markings and Direction of
Rotation (GB 1971-2006, IEC 60034-8:2002, IDT)
GB/T 2828.1-2003 Sampling procedures for inspection by attributes - Part 1:
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection (ISO 2859-1:1999, IDT)
GB/T 4942.1-2006 Degrees of protection provided by the integral design of
rotating electrical machines (IP code) - Classification (IEC 60034-5:2000,
Rotating electrical machines - Part 5: Degrees of protection provided by the
integral design of rotating electrical machines (IP code) - Classification, IDT)
GB/T 5013.4 Rubber insulated cables of rated voltages up to and including
450/750V - Part 4: Cords and flexible cables (GB/T 5013.4-2008, IEC 60245-
motor-pump with a specified flow rate of 25 m3/h, a specified lift of 24 m, and a
rated power of 3 kW is denoted as: QS25-24/2-3.
The single-phase dry single-stage lower-pump small-size submersible motor-
pump with a specified flow rate of 15 m3/h, a specified lift of 10 m, and a rated
power of 0.75 kW is denoted as: QDX15-10-0.75.
The three-phase dry single-stage upper-pump built-in small-size submersible
motor-pump with a specified flow rate of 40 m3/h, a specified lift of 45 m, and a
rated power of 9.2 kW is denoted as: QN40-45-9.2.
The three-phase shielded small-size submersible motor-pump with a specified
flow rate of 25 m3/h, a specified lift of 30 m, and a rated power of 4 kW is
denoted as: QP25-30-4.
The single-phase dry single-stage lower-pump stainless-steel small-size
submersible motor-pump with a specified flow rate of 3 m3/h, a specified lift of
24 m, and a rated power of 0.75 kW is denoted as: QDX3-24-0.75G.
The single-phase dry single-stage lower-pump small-size submersible motor-
pump with float switch with a specified flow rate of 3 m3/h, a specified lift of 24
m, and a rated power of 0.75 kW is denoted as: QDX3-24-0.75F.
The single-phase dry single-stage lower-pump stainless-steel small-size
submersible motor-pump with float switch with a specified flow rate of 3 m3/h, a
specified lift of 24 m, and a rated power of 0.75 kW is denoted as: QDX3-24-
0.75GF.
3.2.3 Supplementary identification refers to the necessary description or
identification of the product by the enterprise according to the contract or
regulations. It is labeled or not as required.
3.3 Basic parameters
3.3.1 When the power frequency is 50 Hz and the voltage is single-phase (220
V) or three-phase (380 V), and under the specified conditions of use, the basic
parameters of single-stage motor-pumps shall conform to Table 1; the basic
parameters of multi-stage motor-pumps shall conform to Table 2; the basic
parameters of QXL and QXR motor-pumps shall conform to Table 3.
3.3.2 When the basic parameters such as the flow rate, lift, synchronous speed,
and number of stages of the motor-pump do not meet the requirements of Table
1~Table 3, the efficiency of the motor-pump is determined in accordance with
Appendix A.
3.3.3 When the motor-pump uses an open impeller, the motor-pump efficiency
insulation. The test voltage (peak) is 2000 V for single-phase motors; for three-
phase motors, is 2300 V for power of 3 kW and below and 2600 V for power
above 3 kW.
4.4.5 The motor-pump shall have safe and reliable overheating or overcurrent
protection device. It shall meet the following requirements:
a) The built-in protection device is provided with the product. The protection
device is clearly stated in the product instruction manual;
b) The specific requirements and configuration methods for the external
protection device shall be given in the product instruction manual;
c) When required by the user, an earth leakage protection device may be
equipped with.
4.4.6 Motor-pumps shall have reliable grounding devices or bolts and have
obvious grounding signs.
4.4.7 The terminal marking and direction of rotation of the cable shall comply
with the provisions of GB 1971. The direction of rotation shall be consistent with
the working direction of the pump. It shall be ensured that the marking is not
easy to be worn during the life of the motor-pump.
4.4.8 The no-load current, no-load loss, locked-rotor current, and locked-rotor
loss of the motor of the motor-pump shall be controlled within the specified
range, to ensure that the performance of the motor meets the requirements of
this Standard. The motor-pump shall be able to start and run for 30 min at 85%
of the rated voltage, without the pump being unable to run and causing fault.
4.4.9 The safety of motor-pumps shall meet the requirements of GB 10395.8.
4.4.10 The safety signs of motor-pumps shall comply with the provisions of GB
10396.
4.5 Requirements for parts and components
4.5.1 The centrifugal switch for the starting of single-phase motors, after
installation, has a disconnecting speed of 60%~75% of the synchronous speed.
Other performance shall meet the requirements of JB/T 7591.
4.5.2 The lead-out cable of the motor-pump shall be the cable specified in GB/T
5013.4 or a cable with the same performance. The cable length shall be no less
than 5 m and may also be provided according to user requirements.
4.5.3 The parts which are subjected to water pressure in the motor-pump shall
be able to withstand the water (air) pressure test for 3 min without leakage. The
4.6.1 All parts of the motor-pump shall pass the inspection before assembly can
be carried out.
4.6.2 The assembly of the motor-pump shall be complete and correct. The
plates and signs shall be complete.
4.6.3 The motor-pump shall be able to ...