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GB/T 2818-2014 (GB/T2818-2014)

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GB/T 2818-2014: PDF in English (GBT 2818-2014)
GB/T 2818-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.060.35
B 91
Replacing GB/T 2818-2002
Submersible motor for deep well
ISSUED ON. JUNE 9, 2014
IMPLEMENTED ON. JANUARY 1, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Models, basic parameters and dimensions ... 6 
4 Technical requirements ... 12 
5 Test methods and inspection rules ... 24 
6 Marks and packaging ... 26 
Foreword
This Standard was formulated in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 2818-2002 " Submersible motor for deep well".
Compared with GB/T 2818-2002, except the editorial changes, the main technical
differences of this Standard are as follows.
-- MODIFY the motor rated voltage (see 3.4 of this version; 3.4 of 2002-version);
-- ADD 8 power levels - 0.25kW, 250kW, 280kW, 315kW, 355kW, 400kW, 450kW, and
500kW (see 3.5 of this version);
-- ADD the frame size and the corresponding power levels (see Table 1 of this version);
-- MODIFY the connection dimensions and tolerances of motor and submersible
pump (see Table 2 of this version; Table 2 of 2002-version);
-- ADD the recommended values of spurious loss Ps of rated load of cast aluminum
rotor motor (see Table 8 of this version);
-- DELETE the E-class insulation (see 4.4 of this version; 4.4 of 2002-version);
-- MODIFY the guarantee-values of the ratio OF motor stall torque TO the rated torque
(see Table 9 of this version; Table 9 of 2002-version);
-- MODIFY the guarantee-values of motor maximum torque (see 4.7 of this version; 4.7
of 2002-version);
-- MODIFY the tolerance table of guarantee-values of electrical performance (see
Table 12 of this version; Table 11 of 2002-version);
-- ADD the polypropylene-type; DELETE the polyvinyl chloride type (see Table 13 of
this version; Table 12 of 2002-version);
-- MODIFY the hot insulation resistance of the stator windings (see 4.12 of this version;
4.12 of 2002-version);
-- ADD the the conventional withstand voltage test for the 200kW and below motors
that are mass-produced, in accordance with the provisions in 9.2 of GB 755-2008
(see 4.13 of this version);
-- ADD the provision – impact voltage peak in inter-turn impulse withstand voltage of
three-phase motor (see Table 14 of this version);
-- ADD the downward bearing capacity of thrust bearing (see Table 15 of this version);
Submersible motor for deep well
1 Scope
This Standard specifies the types, basic parameters, technical requirements, test
methods, inspection rules, marks and packaging for well submersible three-phase,
single-phase asynchronous motor (hereinafter referred to as motor.
This Standard is applicable to water-filled, oil-filled, dry and shielded structure motors
that are integrated with well submersible pumps, submerged and run vertically in water.
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) are
applicable to this Standard.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB 755-2008 Rotating electrical machines - Rating and performance
GB/T 997-2008 Rotating electrical machines - Classification of types of construction,
mounting arrangements and terminal box position (IM Code)
GB/T 2423.4-2008 Environmental testing for electric and electronic products - Part 2.
Test method - Test Db. Damp heat, cyclic (12h+12h cycle)
GB/T 9239.1-2006 Mechanical vibration - Balance quality requirements for rotors in a
constant (rigid) state - Part 1. Specification and verification of balance tolerances
GB/T 12785 Test methods for submersible motor-pumps
GB/T 13384 General specifications for packing of mechanical and electrical product
GB 14711 General requirements for safety of small and medium size rotating
electrical machines
GB/T 22719.1 Interturn insulation of random-wound winding for AC low-voltage
electrical machines - Part 1. Test methods
3.8 The radial runout of circumferential surface, when shaft is rotating, at midpoint of
motor shaft extending connection shall not be greater than requirements in Table 3.
Table 3 Radial runout of circumferential surface, when shaft is rotating, at
midpoint of motor shaft extending connection mm
Diameter of shaft extension
Radial runout limit
Rolling bearing support Sliding bearing support
≤ 30 0.04 0.07
> 30 ~ 50 0.05 0.08
> 50 ~ 80 0.06 0.10
> 80 0.07 0.11
Note. For sliding bearing support, radial runout limit does not include the bearing’s side
clearances.
3.9 Radial runout and face runout OF flange stopper connecting the motor and pump TO
the shaft centerline. for rolling bearing support, it shall not be greater than 0.08mm; for
sliding bearing support, it shall not be greater than two-side clearance of bearing plus
0.1mm.
4 Technical requirements
4.1 Motors shall comply with the requirements of this Standard, and is manufactured
according to the drawings and technical documents that are approved per specified
procedure.
4.2 Under the following conditions, the motor shall be able to operate normally.
a) motor is fully submerged in water, the depth is not more than 70m;
b) the water temperature is not higher than 20°C;
c) the solid content in water (by mass) is not more than 0.01%;
d) pH of the water is 6.5 ~ 8.5;
e) chloride content in water is not more than 400mg/L;
f) hydrogen sulfide content in water is not more than 1.5mg/L;
g) for water-filled motor, the cavity shall be filled by clear-water or other solution
specified by the manufacturer.
NOTE. When the using conditions do not meet the above requirements, the users shall
For oil-filled, dry and shielded motors that are immersed in water that is near to room
temperature, the insulation resistance between the stator winding (including signal lines)
and chassis shall not be less than 100MΩ.
4.12 When closing to operating temperature, thermal insulation resistance of the stator
windings shall not be less than 1MΩ.
4.13 Motor’s stator winding (including signal lines) shall be able to withstand the
withstand voltage test for 1min, without breakdown. Test voltage frequency is 50Hz, and
shall be sinusoidal waveform as possible. For three-phase motor of which the rated
voltage is 380 V, the effective value of test voltage is 1760V; For three-phase motor of
which the rated voltage is 660 V, the effective value of test voltage is 2320V; for
single-phase motor, the effective value of test voltage is 1500V. Before the test, the
water-filled motor shall be immersed in water that is near to room temperature for 12h.
Motor’s withstand voltage test shall not be repeated; if it is indeed necessary, the test
voltage shall be 80% of the specified value.
For mass-production 200kW-and-below motors, it shall be in accordance with the
requirements of GB 755-2008.
For type test, the stator winding’s withstand voltage test shall be carried out when the
winding is near to operating temperature.
4.14 Motor’s stator windings (except the wires that are directly immersed) shall be able to
withstand the inter-turn impulse withstand voltage test, without breakdown; for
single-phase motor, the test voltage (peak value) is 1800V; for three-phase motor, the
test impulse voltage’s peak value shall be according to Table 14.
Table 14 Test impulse voltage peak value of three-phase motor
Rated voltage /V 380 660
Test impulse voltage’s peak value 3000 3900
4.15 For dry motor, it shall be carried out according to the 40°C cyclic damp heat test
method as specified in GB/T 2423.4-2008; after 12 cycles test, measure the insulation
resistance of motor stator winding; for rated voltage of 380V, it shall not be less than
1.14MΩ; for rated voltage of 660V, it shall not be less than 1.98MΩ; and it shall be able to
withstand the withstand voltage test for 1min, without breakdown; for rated voltage of
380V, the effective value of test voltage is 1500V; for rated voltage of 660V, it is 1970V.
Motor’s withstand voltage test shall not be repeated; if it is indeed necessary, the test
voltage shall be 80% of the specified value. Before the repeated test, motor shall be
dried.
4.16 When the three-phase power source is balanced, the tolerance BETWEEN any
phase in no-load current of three-phase motor AND the average value of three phases
4.25 Motor assembly shall be complete and correct; the motor shall rotate freely and
stable, brisk operation, no stuck phenomenon. Nameplate and mark shall be complete.
Painted surfaces shall be dry and intact, without fouling, bumps and cracks.
4.26 Motor’s cable length, measured from the pump outlet, shall not be less than 2m, and
be able to ensure the submersible pump’s normal installation and use.
4.27 When the alphabet’s sequence of marking at wire outlet is same as the direction of
voltage phase sequence of three-phase power, then, observing from th...
......
 
(Above excerpt was released on 2016-06-13, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GBT2818-2014