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JB/T 9542-2015 English PDF (JBT9542-2015)

JB/T 9542-2015 English PDF (JBT9542-2015)

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JB/T 9542-2015: General specification for two-value capacitor asynchronous motors

This Standard specifies the types, basic parameters and dimensions, technical requirements, test methods, inspection rules, marking, packaging, storage and transportation for two-value capacitor asynchronous motors. This Standard applies to two-value capacitor asynchronous motors (frame size 71 ~ 112) (hereinafter referred to as motors); for all kinds of motors derived from this series of motors, this Standard can be referred to.
JB/T 9542-2015
JB
MACHINERY INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
ICS 29.160.39
K 24
RECORD NO.. 49976-2015
Replacing JB/T 9542-1999
General specification for two-value
capacitor asynchronous motors
ISSUED ON. APRIL 30, 2015
IMPLEMENTED ON. OCTOBER 1, 2015
Issued by. Ministry of Industry and Information Technology of the
People's Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Types, basic parameters and dimensions ... 6
4 Technical requirements ... 12
5 Test methods ... 16
6 Inspection rules ... 16
7 Marking, packaging, storage and transportation ... 19
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces JB/T 9542-1999, Specification for two-value capacitor asynchronous motors. Compared with JB/T 9542-1999, the major technical changes are as follows.
-- it adds the requirements for motors of frame size 112;
-- it adds the requirements for power level 3,700 W;
-- it adds the requirements for IP54 and IP55;
-- it adds insulation endurance class 155 (F) in 4.9;
-- it deletes the content of 4.12 ~ 4.16 of the former standard. The same as GB 12350, it adds in 4.20 that ?€?the safety items nor covered in this Standard shall be as specified in GB 12350?€?;
-- it deletes the content of 7.5 and 7.6 of the former standard and adds in 7.4 that ?€?the packaging, transportation and storage of motors shall be as specified in GB/T 5171.1?€?;
-- it deletes the requirements for warranty period in Clause 8 of the former standard. This Standard was proposed by the China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee 26 on Rotating Electrical Machines of Standardization Administration of China (SAC/TC 26). The drafting organizations of this Standard. China National Electric Apparatus Research Institute Co., Ltd., Kaiping Sanwei Micro Motor Co., Ltd., Wuhu Tongli Motor Co., Ltd., Guangzhou Micromotor Co., Ltd., Hangzhou Fusheng Electrical Appliance Co., Ltd., Vkan Certification and Testing Co. Ltd., Nanjing Nanwei Motor Co., Ltd., Zhejiang Linix Motor Co., Ltd., Fujian Wonder Motor Co., Ltd., Ningbo Zhenhai Hongye Electrical Switches Factory.
The main drafters of this Standard. Zhang Chuanjia, Zhou Xingen, Lin Zhenwei, Xu Wei, Zhang Yunchang, Luo Junbo, Lu Xiaomao, Jin Yongbo, Yu Zhuangxiang, Luo Honghong, Wu Yunshan.
The previous editions of the standard replaced by this Standard are as follows. -- ZBK 20003-89;
General specification for two-value
capacitor asynchronous motors
1 Scope
This Standard specifies the types, basic parameters and dimensions, technical requirements, test methods, inspection rules, marking, packaging, storage and transportation for two-value capacitor asynchronous motors.
This Standard applies to two-value capacitor asynchronous motors (frame size 71 ~ 112) (hereinafter referred to as motors); for all kinds of motors derived from this series of motors, this Standard can be referred to.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this document.
GB 755, Rotating electrical machines ?€? Rating and performance
GB/T 4942.1, Degrees of protection provided by the integral design of rotating electrical machined (IP code) ?€? Classification
GB/T 5171.1, Small power motors ?€? Part 1. General technical requirements GB/T 9651, Test procedures for single-phase induction motor
GB/T 10069.1, Measurement of airborne noise emitted by rotating electrical machines and the noise limits ?€? Part 1. Method for the measurement of airborne noise emitted by rotating electrical machines
GB 12350, Safety requirements of small-power motors
JB/T 10490, Mechanical vibration of small power motors ?€? measurement,
evaluation and limits of vibration
batch of motors of the same user and the same type) and certificates of soundness of motors?€? shaft extension flat keys shall be provided to users along with each motor. 4.18 The surface of motors shall be free from visible spots, wrinkles, bubbles, bruises cracks or attached dirt.
4.19 Manufacturers shall guarantee that within one year of use, motors are capable of operating normally in not exceeding two years?€? time after the manufacturing date of manufacturers, provided that users use and store motors correctly as specified in instructions for use and maintenance of manufacturers. If damages occur because of ill manufacturing within the time specified or motors are not able to operate normally, manufacturers shall repair or replace parts and even motors free of charge. 4.20 The safety items nor covered in this Standard shall be as specified in GB 12350. 5 Test methods
5.1 Electrical property test of motors shall be carried out as specified in this Standard and GB/T 9651.
5.2 Testing of vibration shall be carried out as specified in JB/T 10490. 5.3 Testing of noise shall be carried out as specified in GB/T 10069.1. 5.4 Testing of breaking-off rotational speed of centrifugal switches shall be carried out as specified in GB/T 9651.
5.5 Test of enclosure protection degree shall be carried out as specified in GB/T 4942.1. 5.6 Inspection of safety requirements for motors shall be carried out as specified in GB 12350.
6 Inspection rules
6.1 Exit-factory inspection
6.1.1 Each motor shall be delivered only when they pass the exit-factory inspection and attached with a certificate of soundness.
6.1.2 The items of exit-factory inspection include.
a) mechanical inspection, including.
-- rotation inspection. during rotation, motors shall move smoothly and flexibly without stagnation. The sound shall be uniform and harmonious without
6.2 Type inspection
6.2.1 Type inspection needs to be carried out in one of the following cases. a) when the trial production of a new product is completed;
b) when any change in design and technology of motors which is sufficient to cause any change in some properties, relevant type inspection items shall be carried out;
c) when there is any unallowable deviation of current exit-factory inspection results from previous type inspection results;
d) sampling for inspection at fixed period at least once every two years. 6.2.2 The items of type inspection include.
a) all items of exit-factory inspection;
b) determination of locked-rotor torques (determined in the cold state); c) temperature rise test;
d) determination of efficiencies and power factors;
e) short-time over-torque test;
f) determination of maximum torques;
g) determination of minimum torques during the starting process;
h) over-speed test;
i) determination of vibration and noise;
j) determination of voltage at the capacitor end;
k) enclosure protection degree test;
l) damp heat test.
6.2.3 The number of sample machines for type test shall not be smaller than 3. In case of any non-conformance item in samples, the number of products sampled for this item shall be doubled. If they still fail to pass, then the batch of products can only be delivered after the non-conformance is eliminated.

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