GB 18211-2000 General safety requirements for micromotors

This standard specifies the general safety requirements for the design, manufacture and use of micromotors. This standard applies to control motors and other special purpose micromotors with a continuous rated power of 750W or less when converted to 1000r/min or a housing outer diameter of not more than 160mm or a shaft center height of not more than 90mm. GB 18211-2000 General safety requirements for micromotors GB18211-2000 standard download decompression password: www.bzxz.net

GB18211—2000
Reference Standards
Leakage Current
Insulation Dielectric Strength
Insulation Resistance
Electrical Clearance and Creepage Distance
Mechanical Strength
Protective Earthing Device
Rust-proof·
Heat Deformation Resistance
Flame Retardancy
Abnormal
Inspection Rules·
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GB18211—2000
This standard is compiled based on the experience of micromotor research, design, production and application, and with reference to relevant international and domestic standards. This standard is consistent with relevant standards and its compilation format complies with the provisions of GB/T1.1-1993. This standard was proposed by the State Machinery Industry Bureau. This standard is under the jurisdiction of the National Technical Committee for Micro-motor Standardization. The responsible drafting unit of this standard is Xi'an Micro-motor Research Institute. The participating drafting units of this standard are: No. 21 Institute of Shanghai Electronics Department, Shanghai Shangwei Jinli Micro-motor Company, Beijing Micro-motor General Factory, Tianjin Safety Motor Co., Ltd., Boshan Motor Factory of Boshan Motor Factory Group Co., Ltd., Xi'an Micro-motor Factory, Beijing Shuguang Motor Factory, Linquan Motor Factory, Qingdao Micro-motor Factory.
The main drafters of this standard are: Peng Dan, Ning Shouxin, Liu Yong, Wu Hengzhuan, Liu Bowei, Tan Ying. 1 Scope
National Standard of the People's Republic of China
General requirements for safety of electrical micro-machines
General requirements for safety of electrical micro-machines This standard specifies the general safety requirements for the design, manufacture and use of micro-motors. GB18211—2000
This standard is applicable to control motors and other special purpose micromotors with continuous rated power of 750W or less when converted to 1000r/min or with a housing outer diameter of not more than 160mm or a shaft center height of not more than 90mm. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB755—2000 Ratings and performance of rotating electrical machines GB/T4942.1—1985 Classification of protection of motor housings (eqvIEC34-5:1981) GB/T5169.6—1985 Fire hazard test for electrical and electronic products Test method for poor contact of heaters (eqvIEC695-2-3:1984) Www.bzxZ.net
Pull test method Glow-wire test method General GB/T5169.101997 Fire hazard test for electrical and electronic products (idtIEC695-2-1/0.1994)
GB/T7345—1994 Basic technical requirements for control micromotors (neqrOCT16264-10:1985) GB/T7346—1998 Basic external structure type for control micromotors GB/T12113—1996 Method for measuring contact current and protective conductor current (idtIEC990:1990) 3 Definitions
This standard adopts the following definitions.
3.1 Creepage distance
The shortest distance along the surface of insulating material between two conductive parts. 3.2 Clearance
The shortest straight-line distance between two conductive parts. 3.3 Glow-wire test method A test method for evaluating the fire hazard of electrical and electronic products. Use a hot heating wire to simulate the heat source or ignition source of the hot component in the faulty product, so as to evaluate the impact on the fire hazard of the insulating material in contact with or adjacent to it in a short time. 3.4 Bad connection test method A test method for evaluating the fire hazard of electrical and electronic products. Use a special heater to simulate the fault state of abnormal heating of the connector or terminal due to vibration, insufficient contact pressure, non-standard installation and overcurrent, so as to evaluate its impact on the fire hazard of the insulating material holding the connector or terminal. Approved by the State Administration of Quality and Technical Supervision on October 17, 2000 and implemented on July 1, 2001
4 Marking
GB18211-2000
4.1 Each motor must have a nameplate in a conspicuous position, and the nameplate should comply with the provisions of GB/T7346. 4.2 Motor accessories should be marked.
4.3 The outlet mode and marking of each motor should comply with the provisions of GB/T7346. 4.4 When the motor has a protective grounding terminal, a protective grounding graphic symbol shall be marked near the grounding terminal. It must be green and yellow. Non-grounding wires are prohibited from using this color line. "The color of the protective grounding soft wire
4.5 All markings on the motor can be printed, engraved, pressed or other equivalent engraving methods. They must be clear, clear, durable, and not easily erased during the entire service life of the motor.
Whether it meets the requirements should be tested and judged as follows. Wipe with a wet cotton cloth soaked in water for 15 seconds, and then wipe with a cotton cloth soaked in gasoline for 15 seconds. Wipe back and forth once per second. The mark should remain clear and easy to identify after the above test and all the tests specified in this standard. It cannot be easily removed. The nameplate should not be easy to move and the curling phenomenon that may cause it to fall off. 5 Leakage current
5.1 The motor should have good Insulation performance, under normal operation, the leakage current does not exceed 0.75mA. 5.2 The leakage current should be measured after the temperature rise test. The test method is to operate at 1.06 times the rated voltage (the operation method is specified by the product standard) and measure between any pole of the power supply and easily accessible metal parts. The motor must be insulated from the ground during measurement. As shown in Figure 1. The measurement network of the leakage current tester adopts the network in Figure 1b) of GB/T12113. For single-phase motors, switch K should be switched to different polarities of the power supply. For three-phase motors, one of the a, b, and c switches should be opened in turn, and the other two should be closed to measure the maximum leakage current value. a)
1-Easily accessible metal parts on the motor; 2-Motor winding; 3-Leakage current tester Figure 1: Schematic diagram of leakage current measurement
6 Insulation dielectric strength
6.1 The motor should have sufficient insulation dielectric strength. During the test, safety protection measures must be taken to prevent touching the test circuit and the motor under test. 6.2 The motor should be able to withstand the test voltage specified in Table 1. There should be no insulation breakdown or arcing during the test. The peak leakage current of the winding is 10mA. The leakage current does not include the current consumed by the equipment capacitance. 6.3 The test uses a high-voltage power supply with a frequency of 50Hz and a power waveform that is similar to a sine wave. The power supply power and output impedance should be able to maintain It is verified that there is no significant waveform distortion and significant voltage change under various 2
GB18211—2000
loads. The test equipment should be able to distinguish between winding leakage current and surge current. The motor is applied with test voltage as specified in Table 1. The voltage value should slowly rise from zero (at least 3s) to the specified value and remain at the specified value for 1min. During the entire test process, the voltage peak should not exceed 1.5 times the specified effective value, and the fault indicator should be monitored to determine whether the motor has breakdown discharge and leakage current value. At the end of the test, the test voltage should be gradually reduced to zero to avoid surges. Table 1
Rated excitation voltage U
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