What are the items of finished motor inspection

Motor inspection procedures: finished product factory inspection specification 1 Scope: This specification specifies the QL series of motor finished product inspection program requirements, inspection methods and inspection rules. This specification applies to the QL series of motor finished product inspection.2 Normative references The provisions of the following documents through the QJ/CX4.02-2002 inspection specification references and become the provisions of this specification. All subsequent change orders (excluding errata) or revisions of dated referenced documents do not apply to this specification, however, parties entering into agreements under this specification are encouraged to investigate whether the latest versions of these documents may be used. Where a document is cited without date, the latest version of that document applies to this specification: CX1971-1980 Motor end-of-line markings and direction of rotation CX2828-1987 Lot-by-lot inspection and counting sampling procedure and sampling table (for inspection of consecutive lots) CX/T12785-1991 Test methods for electric motors CX/T5118-2001 Electric motors CX/T9615.1- 2000 AC low voltage motors with loose embedded windings 2000 Test method for inter-turn insulation of loose winding of AC low voltage motor 3. Inspection equipment and tools: 500V megohmmeter Frequency withstand voltage tester Inter-turn shock withstand voltage tester Water (gas) pressure tester Motor performance test bench (motor performance test) Tape measure, ruler, thermometer, atmospheric pressure gauge Common tools: wrenches, screwdrivers, scissors and so on Finished motor inspection items, requirements and inspection methods: 1 The motor must be inspected by the following items and can be put into storage only after passing the inspection. See Table 1 for factory inspection items. No. Inspection items Inspection category 1 Measurement of cold DC resistance of motor stator windings Full inspection 2 Measurement of cold insulation resistance of motor stator windings to chassis Full inspection 3 Industrial frequency withstand voltage test of motor stator windings to chassis insulation Full inspection 4 Impulse withstand voltage test of turn-to-turn insulation of motor stator windings Full inspection 5 Steering test Full inspection 6 Inspection of grounding mark Full inspection 7 Appearance inspection Full inspection 8 Operational condition inspection Full inspection 9 Inspection of motor at specified flow rate Full inspection 9 Determination of head at specified flow rate Random inspection 10 Determination of motor efficiency at specified flow rate Random inspection Requirements: 4.2.1 Determination of cold DC resistance of motor winding: Cold DC resistance of motor stator winding shall be measured at the end of the lead cable of the motor with an electric bridge or a digital ohmmeter, and the resistance shall be in accordance with the design parameter specified in the drawings of the product. 4.2.2 Determination of insulation resistance of the motor stator winding on the chassis: Cold insulation resistance of motor stator winding on the chassis: Cold insulation resistance shall be determined by an electric bridge or a digital ohmmeter. Insulation resistance measurement: motor stator windings (main and secondary phase windings) between each other and the insulation resistance between the chassis at room temperature in the cold state with a 500-volt megohmmeter to determine the insulation resistance should not be less than 50MΩ. 4.2.3 Withstand voltage test: motor stator windings between each other and the chassis insulation between the motor stator windings should be able to withstand the withstand voltage test and does not break down, the frequency of the test voltage for the 50Hz and as far as possible, the test voltage is a sinusoidal waveform, the test voltage should meet the product specification design parameters. The frequency of the test voltage is 50Hz, and as far as possible sinusoidal waveform, the effective value of the test voltage and the application time is shown in Table II. Table 2 withstand voltage test test voltage effective value motor rated voltage time 1min test voltage effective value time 1s test voltage effective value 220V 1500V 1800V 380V 1760V 2100V 4.2.4 Motor stator winding turn-to-turn insulation impact withstand voltage test: motor stator winding turn-to-turn insulation should be able to withstand the turn-to-turn impact withstand voltage test and does not break through, the impact test voltage (peak value) is 50Hz, and as far as possible sinusoidal waveform, test voltage effective value and application time is shown in table 2. Impulse test voltage (peak): single-phase motor for 2000V; three-phase motor for power 3kW and below for 2300V, 3kW or more for 2600V. 4.2.5 Rotation test: the direction of rotation of the motor from the direction of the motor inlet for the counterclockwise direction of rotation. 4.2.5.1 The three-phase motor lead cable conductive core wire end should have the corresponding signs U, V, W, when its lead When the cable is connected to the three-phase 380V industrial frequency power supply with the phase sequence, the rotation of the motor should be in the direction of compliance with the requirements. 4.2.5.2 Single-phase motor lead cable end can not be reconnected to the single-phase plug is connected (mark ц, N), when the plug is connected to the single-phase 220V industrial frequency power supply outlet, the motor's direction of rotation should be in line with the requirements. 4.2.6 Grounding mark check: the motor should be reliable grounding device and grounding wire, motor protective grounding device located in the motor grounding port. Motor protective grounding device is located in the motor junction box, and protective grounding graphics in line with 〇 signs. Leads out of the cable green and yellow two-color grounding wire inner end of the grounding device is reliably fastened to the terminal, and leads out of the cable grounding wire end should also be marked with a clear connection to the grounding of the sign 〇. Users are advised to reliably connect the motor to the grounding electrode (body) before use.4.2.7 Appearance Inspection: 4.2.7.1 The motor assembly should be complete with reliable anti-corrosion measures and free of defects such as defacement, collision, cracks, etc.4.2.7.2 The coating of the motor should be uniform and free of defects such as brush marks, shrinkage, blistering, orange peel, wrinkles, flow of the gossip, pinholes, floating and bleeding colors, etc. 4.2.7.3 The motor nameplate marking and safety signage shall be correct and reliable, and conform to the standard regulations. 4.2.8 Motor running condition inspection: 4.2.8.1 The items indicated on the motor nameplate are complete and correct. 4.2.8.2 There should be a safety warning sign on the motor. 4.2.8.3 There should be an obvious red rotating direction sign on the motor. The above signs shall be firmly affixed and clearly written and not easily erased. 4.2.8.4 The motor shall rotate smoothly and freely without jamming and stagnation, etc. 4.2.8.5 The no-load current and no-load loss of the motor at the rated frequency and rated voltage shall be controlled within a certain range of values, which shall ensure that the performance of the manufactured motor conforms to the corresponding product standards. 4.2.9 The head of the motor at the prescribed flow rate shall be Determination: motor factory inspection, in the rated frequency, rated voltage, the motor in the specified flow point and the pump operating flow range of the upper and lower limits of the flow of the three operating points, the head measurement, its determination and deviation should be consistent with the product standards. 4.2.10 Determination of motor efficiency at the specified flow motor factory inspection, at the rated frequency, rated voltage, motor at the specified flow point, pump operating flow range of the upper and lower limits of the flow point of the three operating points, the determination of motor efficiency, the measured value should be in line with the provisions of the product standard. 4.3 Test Methods: 4.3.1 Inspection of the table of items No. 7 with a visual inspection. 4.3.2 Inspection Table Serial number 2~10 items according to GB/T12785-1991 and JB/T9615.1-2000 test method standards. Inspection rules: 5 Each motor shall be inspected and passed by the above inspection items, and attached with inspection certificate and instruction manual before it can be warehoused or shipped out.5.1 The inspection items of Serial No. 1~6 (part of 7 items) of the Inspection Item Table I of this specification 4.1 are inspected and inspected in the inspection of motor motor assembly and assembling process in a manner of full inspection, which is no longer carried out in the inspection of finished products shipped out from the factory. For details, see the company's process inspection specification QJ/SL3.05-2002 provisions. 5.1.1 The specification 4.1 test items Table I serial number 7 ~ 10 items of the test items in the serial number 7 ~ 8 for the full inspection program, serial number 9 ~ 10 of the test for the sampling program. Sampling project inspection samples according to the day (class, batch) the number of motors produced according to GB2828 count sampling standards for sampling inspection. Sampling program: normal inspection of a sampling program, inspection level: general inspection level I, qualified quality level AQL 6.5.5. 5.2 Where the results of the sampling test items (5.1.1) does not meet the qualified quality level AQL6.5 value, determine the test batch is unqualified, the batch of motors must be examined one by one until the removal of unqualified motors. In the unqualified motor marked with a defective product mark. Inspection of qualified motors in a good drying oil rust treatment, affixed to the inspection certificate before storage.5.3 The sampling items out of the batch found in five consecutive batches of two batches of judgment batch failed, from the next sampling inspection batch to start, according to the GB2828 sampling standards to use a more stringent inspection of the sampling program, the level of inspection: General Inspection Level II, the level of quality of the qualified AQL4.0. in five consecutive sampling of more stringent inspection. Only after five times the sampling batch of strict inspection is qualified, it can be restored to normal inspection one sampling (see 5.1.2 sampling program).5.4 The motor which fails to pass the inspection can be reworked or repaired according to the provisions of the company's nonconforming goods management program, and be inspected again one by one in accordance with the provisions of this specification. Where re-inspection is still unqualified motor is judged to be nonconforming, according to the provisions of the company's nonconforming goods management procedures for disposal. 5.5 Mass production of motors in accordance with the provisions of the motor product standards in the inspection rules, the sampling test once a year, each time the number of motors, the number of two units. As the company does not yet have a complete type test conditions, entrusted to the relevant provincial and municipal inspection departments for type test.