1、ICS 29.240.99F 25National Standard of the Peoples Republic of ChinaGB/T 25738-2010Technical Guideline of Motor Commissioning for Nuclear Power Plant Issued on December 23, 2010 Implemented on May 1, 2011Issued by General Administration of Quality Supervision, Inspection and Quarantine of the Peoples
2、 Republic of China and Standardization Administration of the Peoples Republic of ChinaNational Standard of the Peoples Republic of China Technical Guideline of Motor Commissioning for Nuclear Power PlantGB/T 25738 - 2010*Published by Standards Press of ChinaNo.16, Sanlihe North Road, Fuxingmenwai, B
3、eijing Postal code: 100045Website: Tel.: 68523946 68517548Printed in Qinhuangdao printing factory of Standards Press of ChinaSold in Xinhua Bookstore*Format: 8801230 1/16 Print: 0.75 Number of words: 16 thousand words Version 1 issued and printed in February 2011Book no.: 1550551-41576 Price: RMB 16
4、.00For any printing error, request can be made to the issuing center for replacement.All rights reserved.Hotline for complaint: (010) 68533533GB/T25738-20 10Foreword This Standard is drafted according to the rules stated in GB/T 1.1-2009. This Standard is prepared according to the relevant motor sta
5、ndards, taking into account the special characteristics of motors for nuclear power plant.This Standard is proposed and archived by China Electricity Council. Drafting Organizations: Suzhou Nuclear Power Research Institute, China Nuclear Power Engineering Co., Ltd, Zhejiang Electric Power Test and R
6、esearch Institute, Electric Power Research Institute of Guangdong Power Grid CorporationDrafters: Liu Guoqiang, Liu Yong, Yu Yang, Xu Qisheng, Lu Hongkun, Chen Xiaowei, Sun Quanrong, Yang YanzhuGB/T 25738-20101Technical Guideline of Motor Commissioningfor Nuclear Power Plant1. ScopeThis Standard sti
7、pulates the commissioning methods, test requirements and judgment criteria for the high/low voltage AC asynchronous motors of nuclear power plant. This Standard applies to the commissioning of high/low voltage AC asynchronous motors of nuclear power plant.2. Normative References DocumentsThe applica
8、tion of following documents is necessary to this Standard. For the dated references, only the versions corresponding to the relevant dates are applicable to this Standard. For the undated references, the latest version (including all the revisions) is applicable to this Standard. GB 755-2008 Rotatin
9、g electrical machines-Rating and performanceGB/T 1032-2005 Test procedures for three-phase introduction motorsGB 10068-2008 Mechanical vibration of certain machines with shaft heights 56mm and higher measurement, evaluation and limits of vibration severityGB/T 12727-2002 Nuclear power plants electri
10、cal equipment of the safety system qualificationGB 13625-1992 Seismic qualification of electrical equipment of the safety systemfor nuclear power plant GB 50150-2006 Standard for hand-over test of electric equipmentelectric equipment installation engineeringEJ/T 628-1999 Qualifying continuous duty c
11、lass 1E motors for nuclear power plants3. Terms and Definitions The following terms and definitions are used in this document. 3.1 Components The items making up the equipment (the typical components of motor include stator, rotor, bearing, coupling, electric heater, junction box, locking device, se
12、als, sensors, etc.)3.2 Classified Nuclear Safety Motor The safety level (1E level) motor in nuclear power plants. The 1E level motors are classified into 3 types according to the safety classes: K1, K2 and K3. The K1 type motor refers to the motor installed inside the containment, which can withstan
13、d the seismic load and perform the specified functions in normal, accident and/or post-accident states. The K2 type motor refers to the motor installed inside the containment, which can withstand the seismic load and perform the specified functions in normal ambient conditions. GB/T 25738-20102The K
14、3 type motor refers to the motor installed outside the containment, which can withstand the seismic load and perform the specified functions in normal ambient conditions and the accident conditions of some equipment. 3.3 Not classified nuclear safety motor The motor no relevant with nuclear safety (
15、non-IE level)4. Commissioning4.1 Commissioning prerequisites4.1.1 The commissioning personnel shall have received the motor commissioning skill training and have the corresponding qualifications and authorizations. 4.1.2 The instruments and meters used for the commissioning shall pass the relevant c
16、alibrations and tests and are still in their validity life. 4.1.3 The motor design and end of manufacture documents are complete and valid. 4.1.4 The electric, instrument and control cables have been connected and handed over for commissioning. 4.1.5 The documents for commissioning have taken effect
17、, and the relevant commissioning work permit has been obtained. Note: For the qualification of the classified nuclear safety motor, special factory test documents and the verification of the compliance of the classified nuclear safety motor application environment with the design requirements, pleas
18、e refer to appendix A. 4.2 Preliminary check4.2.1 Visual checkVisual check should comply with the following requirements: a) The motor components shall have intact appearance, free of corrosion or deformation. b) The surface coating or paint shall be intact. c) The motor IP class shall meet the desi
19、gn requirements. d) The motor nameplate parameters shall meet the design requirements.e) The safety level marking of the classified nuclear safety motor shall meet the design requirements.f) The motor rotation indication shall meet the design requirements.g) The motor seals shall meet the design req
20、uirements.h) The terminals marking of motor should be clear.i) For the motor with insulator sleeve, the insulation shall be intact. j) The motor power cable shall be firmly connected and properly marked, and its section area shall meet the design requirements.k) The grounding wire shall be firmly co
21、nnected to the grounding grid. The grounding mark shall be correct, and its section area shall meet the design requirements.GB/T 25738-201034.2.2 Mechanical check Mechanical check should comply with the following requirements:a) The motor base shall be intact, and the anchor bolts are firmly install
22、ed. b) Manual jig motor should have no jam, friction or abnormal noise. c) The motor anti-reverse device shall operate normally.d) The motor accessories shall be firmly and properly installed. e) The bearing lubricating oil level shall be within the normal range, and there is no leakage from the oil
23、 tank. f) The K1 and K2 type motors shall use the anti-radiation lubricating oil and grease. g) For the motor with coupling, the coupling shall be completely uncoupled with the loads, and the clearance shall meet the requirements. The enclosure of the gear coupling shall be fixed to the shaft. 4.2.3
24、 Earth continuity checkIt is required to measure the resistance between the electrically non-conductive metal part and the grounding circuit. The contact resistance shall be no more than 0.1.4.3 Static test 4.3.1 Insulation resistance and absorption ratio measurement 4.3.1.1 Measurement requirements
25、 and megohmmeter selectionThe measurement requirements and the selection of megohmmeter shall comply with the provisions of Section 5.1.1 to 5.1.2 of GB/T1032-2005. 4.3.1.2 Judgment criteria The insulation resistance and absorption ratio shall meet the following requirements: a) The measurement of i
26、nsulation resistance and absorption ratio shall comply with the provisions of section 6.0.2 of GB50150-2006. b) For the classified nuclear safety K1 and K2 motors, if the motor is connected with the power cable during the measurement, the insulation resistance and absorption ratio shall be measured
27、with the cable connected, and the measured resistance value shall be no less than 50M. If the measured resistance is less than this value, disconnect the motor and the power cable, and measure the insulation resistance of the motor only, which shall be no less than 50M. If the manufacturer has other
28、 standards, the manufacturers standards shall prevail. Note: For the conversion factor for converting the insulation resistance value of the motor stator winding to the operating temperature, please refer to appendix B. 4.3.2 Stator winding polarity checkCheck if the stator winding polarity and conn
29、ection are correct. If the neutral point is not led out, the motor can be exempted from this inspection. GB/T 25738-201044.3.3 Measurement of insulation resistance of thermometer and bearing The measurement of insulation resistance of thermometer and bearing shall meet the following requirements: a)
30、 When measuring the insulation resistance of embedded thermometer, thermocouple or resistance thermometer, the megohmmeter of no more than 250V shall be used, and the measured insulation resistance value shall be no less than 0.5M. b) When measuring the insulation resistance of motor bearing, if the
31、 oil pipe is connected, the 1000V megohmmeter shall be used for measurement after the oil pipe is installed, and the measured insulation resistance value shall be no less than 0.5M.4.3.4 Electric heater checkTo verify that the electric heater is available before the motor running test, the following
32、 tests shall be conducted: a) Insulation inspection: Use the 500V megohmmeter to measure the insulation resistance between the electric heater and the earth, and between the electric heater and the stator winding. The insulation resistance shall be no less than 0.5M. If there is a temperature detect
33、 switch, measure the insulation resistance between the switch and the winding, and between the switch and the electric heater. The insulation resistance shall be no less than 1M.b) DC resistance: Measure the DC resistance of the electric heater with a multi-meter. The heater shall have no open circu
34、it or short circuit, and the DC resistance shall meet the value specified in the nameplate. c) Energizing check: Confirm that the power voltage is consistent with the voltage specified on the electric heater nameplate. After the electric heater energizing, measure the operating voltage and current,
35、and calculate the power to verify that there is no obvious difference between the calculated value and the nameplate power. 4.3.5 Measurement of DC resistance of stator winding 4.3.5.1 Measurement methodThe measurement of DC resistance of stator winding shall comply with the relevant provisions in s
36、ection 5.2.2 of GB/T 1023-2005.4.3.5.2 Calculation of resistance valueThe resistance value shall be calculated according to the relevant provisions in section 5.2.3 of GB/T 1023-2005.4.3.5.3 Judgment criteria The judgment criteria shall comply with the relevant provisions in section 6.0.3 of GB/T501
37、50-2006.4.3.6 Measurement of Motor stator winding DC voltage endurance and leakage currentThe measurement of DC voltage endurance and leakage current of motor stator GB/T 25738-20105winding shall comply with the relevant provisions in section 6.0.4 of GB/T50150-2006. The test precautions shall compl
38、y with the relevant provisions in section 3.0.4 of GB/T50150-2006. If the manufacturer has any special instructions, the relevant instructions shall prevail. 4.3.7 Motor stator winding and rotor windings AC voltage endurance test4.3.7.1 Voltage selection for AC voltage endurance testThe voltage sele
39、ction for AC voltage endurance test shall comply with the relevant provisions in sections 6.0.5 to 6.0.6 of GB/T50150-2006.4.3.7.2 Judgment criteria1 minute voltage endurance test shall be conducted. The capacitor current shall be measured. There shall be no arcing or flashing. 4.3.7.3 Other require
40、ments AC voltage endurance test may not be performed on the motors below 1,000 V and 100 kW, which can be replaced by the 1 minute measurement with 2500V megohmmeter. If the manufacturer has any special instructions, the relevant instructions shall prevail. 4.4 Startup test 4.4.1 Preliminary check b
41、efore startupThe Preliminary check before startup shall meet the following requirements: a) Verify that the local and remote stopping/starting devices of the motor operate normally.b) Verify that the relevant alarms and indicators have been inspected and meet the functional requirements, and that th
42、e relevant instrument and control system is available. c) Verify that the motor protection device inspection and parameter setting are completed and confirmed to be qualified. d) Verify that the cooling system (cooling water system or ventilation system) operates normally. e) Verify that the motor h
43、as normal lubricant level, and that the lubrication system and jacking system operate normally. f) Verify that the electric heater operates normally. g) Verify that the insulation resistance of the motor meets the requirements. h) Verify that the motor and the loads can be uncoupled. If they cannot
44、be uncoupled, the test in 4.4.3 cannot be performed. Instead, the load test in 4.4.4 can be directly performed, after the check in 4.4.2 is finished. 4.4.2 Inspection of rotation direction If motor and load can be uncoupled in this test, the method of closing the motor breaker just long enough to ro
45、ll the motor can be used to confirm the direction of rotation.If the motor and the loads cannot be uncoupled, when the mechanical system GB/T 25738-20106allows short-time reverse operation, short time start can be used to confirm the direction of rotation; when the mechanical system does not allow s
46、hort-time reverse operation, verify that the phase of the motor power supply is consistent with the load rotation before short time start. 4.4.3 No-load test 4.4.3.1 No-load current measurement The no-load current measurement shall meet the following requirements: a) The no-load current of low-volta
47、ge motor shall be measured with clamp-on ammeter. When precise measurement is required, it can be measured with recorder. The no-load current of high-voltage motor shall be measured with recorder or read from the instrument and control system. b) There shall be no obvious difference between the no-l
48、oad current and the factory test data. c) When the three-phase power is balanced, the deviation of any phase in the three-phase no-load current from the average value of three phases shall be no more than 10% of the average value. 4.4.3.2 No-load operation The no-load operation shall meet the follow
49、ing requirements: a) The no-load continuous operation shall last for 2 hours. b) The motor shaft shall rotate stably. c) The bearing shall have no abnormal noise during the operation. d) No odor shall be given out from the motor insulator. 4.4.3.3 Shaft voltage measurement test For the motor with insulation between bearing block and the earth, the shaft voltage during the operation shall be measured when the conditions permit. Multi-meter with high internal resistance shall be used to measure the shaft voltage at the two ends of the motor bearing. The measured v
