JB/T 5870-2002 Technical requirements for YZR series medium-sized high-voltage wound rotor three-phase asynchronous motors for hoisting and metallurgy
Some standard content:
ICS29.160.30
JB/T58702002, the Machinery Industry Standard of the People's Republic of China
Replaces JB5870—1991
Technical Specifications for YZR Series Medium-Sized High-Voltage Wound-Rotor Three-Phase Asynchronous Motors for Hoisting and Metallurgy
Published on July 16, 2002
Implemented on December 1, 2002
Published by the State Economic and Trade Commission of the People's Republic of China Foreword||t t||JB/T5870—2002
JB/T5870—2002
This standard replaces JB5870-1991 "Technical conditions for medium-sized high-voltage wound rotor three-phase asynchronous motors for YZR series hoisting and metallurgy". The main changes of this standard compared with JB5870—1991 are as follows: revised from mandatory industry standard to recommended industry standard. The referenced documents are revised to mark the date and quote the latest version: the numerical rounding rules are added.
This standard is proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Rotating Electric Machines, Hoisting Metallurgy and Shielded Motor Standardization Subcommittee (SAC/TC26/SC4).
The drafting units of this standard are: Jiamusi Explosion-proof Motor Research Institute, Jiamusi Electric Motor Co., Ltd., Shunde Desheng Electric Motor Co., Ltd. The main drafters of this standard are: Tan Yulin, Wang Dianyou, Cao Dechang, Guo Xiaojia. This standard was first issued in October 1991. 1 Scope
Technical conditions for YZR series medium-sized high-voltage wound rotor three-phase asynchronous motors for lifting and metallurgy
JB/T5870—2002
This standard specifies the type, basic parameters and dimensions, technical requirements, inspection rules, marking and packaging requirements of YZR series medium-sized high-voltage wound rotor three-phase asynchronous motors for lifting and metallurgy. This standard is applicable to wound rotor three-phase asynchronous motors (hereinafter referred to as motors) for electrical transmission of various lifting machinery and metallurgical auxiliary equipment. All motors derived from this series of motors can be used as references. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions are applicable to this standard. GB/T191-2000 Pictorial symbols for packaging, storage and transportation (eqvISO780:1997) GB755-2000 Ratings and performance of rotating electrical machines (idtEC60034-1:1996) GB/T997-1981 Code for motor structure and installation type (neqEC60034-7:1972) GB/T1032-1985
Test methods for three-phase asynchronous motorswww.bzxz.net
GB/T1096-1979
GB/T1993-1993
GB/T4772.1-1999
Ordinary flat key type dimensions
Cooling methods for rotating electrical machines
Dimensions and output power of rotating electrical machines Grade Part 1: Frame size 56~400 and flange size 55~1080 (idtIEC60072-1:1991)
GB/T4942.1—2001
GB10068—2000
60034-14:1996)
Classification of protection of rotating electrical machine enclosures (IP code) (idtEC60034-5:1991) Mechanical vibration of motors with a shaft center height of 56mm and above Vibration measurement, evaluation and limits (idtECGB10069.3-1988
B Rotating electrical machine noise determination method and limits Noise limits (negIEC60034-9) GB1471i--1993 Small and medium General safety requirements for rotating electrical machines (neqEC60034-1) JB/T10098-2000 Impact voltage resistance level of AC motor stator forming coil (idtIEC60034-15:1995) JB/T10105-1999 Technical conditions for YZR series three-phase asynchronous motors with wound rotors for hoisting and metallurgical use 3 Types, basic parameters and dimensions
3.1 Protection level of motor housing: IP44 for hoisting environment and IP54 for metallurgical environment (see GB/T4942.1-2001). 3.2 Motor cooling method is IC61 (see GB/T1993-1993). 3.3 The structure and installation type of the motor is IM1002 (see GB/T997-19 81). 3.4 The motor's duty system is divided into six types: S2, S3, S4, S5, S6 and S7. The standard duty system is S360% (i.e. the standard duty system is S3, the standard load duration is 60%, and each duty cycle is 10 minutes). The user should specify the required duty system type as accurately as possible; if the user does not specify, the motor will be shipped according to the standard duty system. 3.5 The motor should be manufactured according to the following rated powers when in the standard duty system: 300kW, 375kW, 400kW, 475kW, 560kW. The power when not in the standard duty system shall be given by the manufacturer separately. 3.6 The rated frequency of the motor is 50Hz, and the rated voltage is 3000V or 6000V. Other frequencies and voltages shall be negotiated between the user and the manufacturer. 1
JB/T5870—2002
3.7 The corresponding relationship between the rated power, moment of inertia J, rotor winding open circuit voltage and frame number of the motor in the standard duty system shall comply with the provisions of Table 1.
Frame size
Synchronous speed
Open-circuit voltage of rotor winding
3.7.1 The rated power in non-standard working system is determined according to the actual temperature rise value of the rated power in the standard working system, which is given by the manufacturer in the product sample. However, the rated power in S6 working system is given by the manufacturer after the user provides the required working system parameters. 3.7.2 The tolerance of the open-circuit voltage of the rotor winding is 210%. 3.7.3 The tolerance of the moment of inertia is 10%. 3.8 Dimensions and tolerances of the motor:
3.8.1 The installation dimensions and tolerances of the motor shall comply with the provisions of Table 3 (see GB/T4772.1-1999), and the overall dimensions shall not be greater than those specified in Table 3.
3.8.2 The dimensions and tolerances of the motor shaft extension key shall comply with the provisions of Table 2 (see GB/T1096-1979). 2
Shaft extension diameter D
Basic dimensions
Limit deviation
The symmetry tolerance of the motor shaft extension keyway is 0.06mm. Technical requirements
Basic dimensions
4.1: The motor shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 4.2 The motor shall be able to operate at rated speed when used under the following conditions. Height
Unit: mm
Limit deviation
4.2.1 The altitude shall not exceed 1000m. If the motor is specified to be used at an altitude exceeding 1000m, it shall be handled in accordance with the provisions of GB755-2000. 4.2.2 The maximum ambient air temperature varies with the seasons. The lifting environment shall not exceed 40℃, and the metallurgical environment shall not exceed 60℃. The minimum ambient air temperature is -15℃. If the motor is specified to be used in an ambient air temperature higher or lower than the above provisions, it shall be handled in accordance with the provisions of GB755--2000.
4.2.3 The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is not higher than 25℃. 4.2.4 Indoor use.
4.2.5 Frequent starting, braking (electrical or mechanical) and reversal according to the provisions of different working systems. 4.2.6 Frequent mechanical vibration and impact.
4.3 The deviation of the power supply voltage and frequency from the rated value during the operation of the motor shall comply with the provisions of GB755--2000. 4.4 When the motor is started, the rotor must be connected in series with an additional resistor or reactance to limit the average value of the starting current to no more than 2 times the rated current of various working systems.
Temperature is -15℃. If the motor is specified to be used in an ambient air temperature higher or lower than the above provisions, it should be handled in accordance with the provisions of GB755--2000.
4.2.3 The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is not higher than 25℃. 4.2.4 Indoor use.
4.2.5 Frequent starting, braking (electrical or mechanical) and reversing according to the provisions of different working systems. 4.2.6 Mechanical vibration and impact.
4.3 The deviation of the power supply voltage and frequency from the rated value during the operation of the motor shall comply with the provisions of GB755-2000. 4.4When the motor starts, the rotor must be connected in series with an additional resistor or reactance to limit the average value of the starting current to no more than twice the rated current of various working systems.
Note: The limit difference of C size includes the vibration of the shaft. Size
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JB/T5870—2002
4.5The motor adopts coupling or spur gear transmission. When using spur gear transmission, its pitch circle diameter should not be less than 2 times the shaft extension diameter. 4.6When the motor is under rated voltage and standard working system, the guaranteed value of the ratio of maximum torque to rated torque is 2.8 times, and the numerical rounding interval is 0.1.
4.7 The tolerance of the maximum torque multiple is -10% of the guaranteed value. 4.8 Insulation grade of the motor: F grade for hoisting and H grade for metallurgy. When the altitude and ambient air temperature meet the requirements of 4.2.1 and 4.2.2 of this standard, the temperature rise limit and allowable temperature of each heating part of the motor shall not exceed the requirements of Table 4, and the numerical value shall be rounded off to 1. Table 4
Heating parts of the motor
Winding temperature rise (resistance method)
Collector ring temperature rise (thermometer method)
Bearing allowable temperature (thermometer method)
F grade insulation
H grade insulation
115℃
Note: The allowable humidity of the bearing refers to the value at the ambient air temperature specified in 4.2. When measured at an ambient air temperature lower than the specified ambient air temperature, the bearing temperature shall be the difference between the measured temperature plus the specified ambient air temperature and the actual ambient temperature. 4.9
When the three-phase power supply is balanced, the deviation of any phase of the motor's three-phase no-load current from the three-phase average value should not be greater than 10% of the three-phase average value.
The insulation resistance of the motor winding should not be less than the value obtained by the following formula in the hot state. 4.10
1000+P/100
R,=1000+P/100
Where:
R,—insulation resistance of stator winding, unit is MQ: R2—insulation resistance of rotor winding, unit is M2; Ui-—rated stator voltage, unit is V: U2—open-circuit voltage of rotor winding, unit is V; P—rated power of motor, unit is kW. (1)
4.11 The motor winding should be able to withstand an insulation withstand voltage test lasting 1 minute to ground without breakdown. The frequency of the test voltage is 50Hz and it should be a sinusoidal AC voltage as much as possible. Voltage effective value: stator is 1000V+2Ul, rotor is 1000V+4U24.12 The stator winding of the motor should be able to withstand the inter-turn impulse voltage test or short-time voltage rise test without breakdown. When conducting the inter-turn impulse voltage test, the coil impulse voltage peak value and test method shall comply with the provisions of JB/T10098-2000: The short-time voltage rise test is carried out when the motor is unloaded, the external voltage is 130% of the rated voltage, and the time is 3min. When the voltage value is increased to 130% of the rated voltage, the frequency is allowed to be increased at the same time.
4.13 The motor should be able to withstand the short-time over-torque test of the maximum torque value (allowed to take into account the tolerance) specified in 4.6 when it is hot and the torque is gradually increased, and it lasts for 15s without sudden change of speed, stalling and harmful deformation. At this time, the voltage and frequency should maintain the rated value. 4.14 The maximum speed allowed for the motor is 2.5 times its synchronous speed. The motor shall be able to withstand an overspeed test of 1.2 times the maximum speed when it is unloaded for 2 minutes. If the rotor does not undergo harmful deformation and can meet the requirements of the withstand voltage test in 4.11, it is qualified. 4.15 The unevenness of the motor air gap shall not exceed the requirements of Table 5. 4.16 The motor adopts rigid installation, and the effective value of the vibration intensity measured when it is unloaded shall not exceed 2.8mm/s, and the numerical rounding interval is 0.1. 4.17 The noise value of the A-weighted sound power level measured when the motor is unloaded shall not exceed 102dB(A), but 560kW shall not exceed 105dB(A) and the numerical rounding interval is 1.
In the table:
Basic size of air gap.
Uneven value of air gap, which is defined as:
e=8+8,+8,-88,-8,-86
Where:, 52, 5, are the air gap values measured at a distance of 120°. 1.3
JB/T5870—2002
4.18 The stator and rotor junction box of the motor is located on the side of the base, and on the right side of the motor when viewed from the main shaft extension end. It can be located on both sides of the motor according to user needs.
4.19 The motor should be equipped with a thermal protection element. 4.20 The motor junction box should be equipped with a grounding terminal, and an external grounding terminal should be set on the base. There should be a permanent grounding mark near the grounding terminal.
4.21 Each fastening bolt of the motor must have anti-loosening measures. 4.22 Where the safety requirements of this standard are not specified, they shall comply with the provisions of GB14711-1993. 4.23 The motor's flap extension key, operating and maintenance instructions (at least one copy for a batch of motors of the same user and model) and product certificate should be provided to the user along with the motor. Each motor is provided with 24 brushes 4.24 If the user uses and stores the motor correctly according to the provisions of the operating and maintenance instructions, the manufacturer shall repair or replace parts or motors for the user free of charge if the motor is damaged or fails to work properly due to poor manufacturing quality within one year of use, but no more than two years from the date of shipment from the manufacturer. 5 Inspection rules
Each motor must pass the inspection before it can leave the factory, and a product certificate shall be attached. 5.1
5.2 Each motor shall be inspected and tested. The inspection and test items include: 5.2.1 Mechanical inspection:
Rotation inspection: When the motor rotates, it should be smooth and light, without stagnation and harmful noise. a)
Appearance inspection: Check whether the motor is assembled completely and correctly, and the surface paint should be completely dry, without bare red, stains, damage and cracks b)
and other defects.
Inspection of installation dimensions, overall dimensions and key dimensions (including symmetry of shaft extension keyway). Check brush contact: brush and collector ring should be in good contact and brush should move freely. 5.2.2
Measurement of insulation resistance of winding to ground and between windings. Measurement of DC resistance of winding in actual cold state 5.2.3
Measurement of open circuit voltage of rotor winding.
5.2.5 Test of voltage increase between turns or for a short time of stator winding 5.2.6 Determination of no-load current and loss.
5.2.7 Voltage withstand test between phases of winding and between phases of winding and ground. When the motor has only three leads, the voltage withstand test between phases of winding is allowed to be carried out on semi-finished products.
5.2.8 Determination of noise.
5.2.9 Determination of vibration.
5.3 Type test must be carried out for the following situations: a) The first trial production or small batch trial production of the manufacturer. 5
JB/T5870—2002
When the design or process changes are sufficient to cause changes in certain performance and parameters, when the inspection test results have an unacceptable deviation from the previous type test results. Electric motors produced in batches should be tested regularly, and the sampling time is once every two years. 5.4 The type test items of the motor include: 5.4.1 All items of the inspection test.
Determination of efficiency and power factor.
Temperature rise test: The motor shall be subjected to temperature rise test at 60% of the power of the reference working system S3. The temperature rise of the power in non-reference working system (which can be calculated by the calculation method) shall be carried out in accordance with the provisions of Appendix A of JB/T101051999. 5.4.4
Overspeed test.
Short-time overtorque test.
Maximum torque measurement
Measurement of torque-slip curve.
Measurement of no-load characteristic curve.
Measurement of moment of inertia.
Shell protection grade test.
1 Air gap unevenness inspection.
5.55.2.1 c) and 5.2.8 and 5.2.9 can be spot checked. The spot check method shall be carried out by the manufacturer in accordance with relevant regulations; 5.4.9~-5.4.11 can be carried out when the motor is finalized or the structure and process have major changes. 65.2.25.2.7 and 5.4.25.4.9 shall be carried out in accordance with GB/T1032-1985; 5.2.8 shall be carried out in accordance with GB10069.3-1988; 5.2.9 shall be carried out in accordance with GB5.6
10068-2000; item c) in 5.2.1 shall be carried out in accordance with GB/T4772.1--1999; 5.4.10 shall be carried out in accordance with GB/T4942.1-2001 for marking and packaging
The nameplate material and the engraving method of the nameplate data should ensure that the writing is not easily erased during the entire service life of the motor. From the fan end, the nameplate should be fixed on the upper right half of the motor base, and the items to be marked are as follows: a)
Manufacturer name:
Motor name (medium-sized high-voltage wound rotor three-phase asynchronous motor for lifting and metallurgy): Motor model:
Rated frequency, unit Hz:
Rated power, unit kW
Rated voltage, unit V;
Rated current, unit A:
Rotor winding open circuit voltage, unit V;| |tt||Rotor current, in A:
Rated speed, in r/min:
Duty:
Wiring method;
Insulation level:
Ambient air temperature, in ℃:
Moment of inertia, in kgm2
Protection level:
Noise limit:
Mass, in kg;
Standard number:
Product number:
Year and month of production.
The shaft extension key of the motor must be tied to the shaft, and the shaft extension and key surface must have anti-rust and protection measures. The packaging of the motor should avoid moisture and damage during normal transportation. The words and signs on the outer wall of the box should be clear and neat, and the contents are as follows: a)
Shipping station and manufacturer name:
Receiving station and receiving unit name:
Motor model and product number:
Net weight of motor and gross weight of box: JB/T5870--2002
Box size, and the words and symbols such as "Handle with care", "Avoid moisture", and "Center of gravity" should be marked in appropriate positions on the outside of the box, and the graphics should comply with the provisions of GB/T191-2000. 7
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