This standard specifies the terminology, product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of current-type starting relays for small fully enclosed refrigeration motors and compressors (hereinafter referred to as starters). This standard applies to current-type starters installed on the surface of the housing of fully enclosed refrigeration motors and compressors for household and similar refrigeration appliances. JB/T 6740.3-1993 Current-type starting relays for small fully enclosed refrigeration motors and compressors JB/T6740.3-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Current-type starting relay for small fully enclosed refrigeration motor-compressor
Subject content and scope of application
JB/T 6740.3-93
This standard specifies the terminology, product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of current-type starting relay for small fully enclosed refrigeration motor-compressor (hereinafter referred to as starter). This standard applies to current starters installed on the surface of the housing of fully enclosed refrigeration motor-compressor for refrigeration appliances for household and similar purposes.
This standard should be used together with JB6740.1 "Safety Requirements for Starting Relays for Small Fully Enclosed Refrigeration Motor-Compressor". 2 Reference standards
Basic environmental test procedures for electrical and electronic products Test Ba: High temperature test method GB2423.10
Basic environmental test procedures for electrical and electronic products Test Fc: Alarm (sinusoidal) test method GB2828
GB2829
National standards
3 Terminology
Batch inspection counting sampling procedures and sampling tables Periodic inspection counting sampling procedures and sampling tables Packaging and marking of electrical accessories and controllers and protectors for household and similar purposes Safety requirements for starter relays for small fully enclosed refrigeration motors and compressors The "voltage" and "current" used in this standard refer to effective values ​​unless otherwise specified. 3.1 Pull-in current
The line current when the starter contacts are opened and closed. 3.2 Release current
The line current when the starter contacts are closed and opened. 3.3 Maximum pickup current
The limit value of the pickup current of a starter of a certain model and specification. 3.4 Minimum release current
The limit value of the release current of a starter of a certain model and specification. 4 Product classification
4.1 Type
The starting relay specified in this standard is a starting relay in which the energized coil is sensitive to current. 4.2 Model naming
Approved by the Ministry of Machinery Industry on August 21, 1993
Implemented on October 1, 1993
JB/T6740.3-93
Design serial number, using Chinese phonetic letters A, BC to indicate the order of improved design. Specification code, using three digits.
Structural type code, using one digit. Product category code, using the letter QL. Model description:
Product category code—-QL indicates the structure type code of the current starter~2 indicates the 2-hole plug-in type, and 3 indicates the 3-hole plug-in type. Specification code—Using the maximum pull-in current value of the current starter to indicate the corresponding minimum release current value, see the specification in Table 1 for details. Design serial number—A is used for the first design, and B is used for the second design. Example:
QL2-1.12B indicates a current starter with a maximum pull-in current of 1.12A, a minimum release current of 0.96A, a two-hole plug-in structure, and a second design.
4.3 Basic parameters
The basic series and parameters of the current starter are preferably selected according to the values ​​listed in Table 1. Table
Maximum pickup current
Minimum release current
Maximum pickup current
Minimum release current
Maximum pickup current
Installation dimensions, structure and appearance
JB/T 6740.393
Continued Table 1
Minimum release current
Maximum pickup current
Minimum release current
The installation dimensions of the two-hole plug-in type starter are shown in Figure 1 (except for motors and compressors above 360W). The appearance and structure should be consistent with the production drawings of the manufacturer. The size of the terminal that is electrically connected to the external circuit should be 6.3mm×0.8mm. 11.66
Two-hole insertion type
Two-hole insertion type
Technical requirements
The starter shall comply with this standard and JB6740.1, and shall be manufactured in accordance with the product drawings and technical documents approved by the prescribed procedures. 65
5.2 The starter shall be able to work normally under the following conditions: n.
Ambient air temperature -10～43℃;
JB/T6740.3-93
Relative air humidity is not more than 90% (at 25℃); b.
The power supply voltage is the rated voltage, and the frequency is the rated frequency; the inclination angle of the starter's vertical line is within 0(°)～10(); there is no corrosive, flammable and explosive gas and conductive dust around. 5.3 Appearance requirements
5.3.1 The metal parts of the starter shall not have cracks, coating shedding and rust. The coil welding points shall be firm and beautiful, and the terminals shall not be loose. 5.3.2 The surface of plastic parts shall be smooth, flat, uniform in color, without cracks, scratches and convexities. 5.3.3 The enameled wire shall not be damaged and the paint layer shall not fall off. 5.4 Insertion and extraction force
If the connection between the starter and the compressor is suspended plug-in connection, the insertion force for the two-pole socket shall be less than 90N and the extraction force shall be greater than 25N. 5.5 Pull-in current and release current
a. The pull-in current of the starter shall be less than or equal to the corresponding value specified in Table 1; b. The release current of the starter shall be greater than or equal to the corresponding value specified in Table 1. 5.6 Vibration
The starter shall not be damaged after the vibration test in Article 6.7, and the terminals shall not be loose, and shall meet the requirements of Article 5.5. 5.7 Drop
After the drop test in accordance with Article 6.8, the appearance of the starter shall be free of cracks, the terminals shall not be loose, and it shall comply with the requirements of Article 5.5. 5.8 High temperature resistance
After the high temperature test in accordance with Article 6.9, the appearance of the starter shall be free of deformation, blistering, cracks, the terminals shall not be loose, and it shall comply with the requirements of Article 5.5. 5.9 Electrical life
After the electrical life test in accordance with Article 6.10, the starter shall comply with the requirements of Article 5.5. During the test, the sample is not allowed to have faults such as burning, fire, deformation, contact adhesion, etc.
6 Test method
6.1 Test environment conditions
Unless otherwise specified, the test environment conditions shall meet the following requirements: Temperature 20±5℃
Relative humidity 45%~75%
Atmospheric pressure 86106kPa
6.2 Test instruments and measuring tools
Unless otherwise specified in the standard, the accuracy of the test instruments is as follows: a
The accuracy of electrical measuring instruments shall not be lower than Class 0.5 (except megohmmeter); its accuracy shall not be lower than Class 1.0 during factory inspection; the accuracy of thermal instruments shall not be lower than Class 0.5 or temperature indicators with 0.2℃ resolution; during factory inspection, it shall not be lower than Class 1.0 or 1℃ b.
resolution;wwW.bzxz.Net
c. The resolution of vernier caliper is 0.02mm or used for scale. 6.3 Appearance inspection
Inspect the appearance of the starter visually and by hand. It shall meet the requirements of Article 5.3. 6.4 External dimensions and installation dimensions inspection
Measure with a vernier caliper. It shall meet the requirements of Article 4.4. 6.5 Plug-in and pull-out force test
Install the standard plug for the starter (see Figure 2) on the plug-in and pull-out force tester. Insert and pull out at a speed of 100 to 300 mm/min. Measure the first insertion force and the sixth pull-out force. They shall meet the requirements of Article 5.4. 0.25±25
20099T
7.3±0.08
6.6Pull-in current and release current detection
R0.61±0.051
#8-808
Material: T10
Hardness: HRC60～62
Material: T10
Hardness: HRC6062
The test principle diagram is shown in Figure 3. The power supply frequency is the rated frequency, and the capacity is an adjustable power supply of more than 150VA. The starter is fixed on a vibration-free test bench. The current passing through the indicator light L is not more than 0.2A. The voltage across the indicator light L is 36V. Connect the adjustable power supply to the 1 and 3 terminals, and the current value of the starter coil gradually increases from zero. When the indicator light is on, the value displayed by the ammeter A is the pull-in current value of the sample being tested. Then gradually reduce the current. When the indicator light just goes out, the value displayed by ammeter A is the release current value of the test item.
The test result shall comply with the provisions of Article 5.5. 32
6.7 Vibration test
L indicator light
A-ammeter
The test method shall be carried out in accordance with GB2423.10. Fix the starter on the vibration test bench with an amplitude of 1.5mm and a frequency of 25-30Hz. After vibrating in three mutually perpendicular directions for 1h, it shall comply with the provisions of Article 5.6. 6.8 Drop test
Put the starter alone in a 4mm thick corrugated paper box and let it fall freely from a height of 600mm on the cement floor in three mutually perpendicular directions once each. After falling, it shall meet the requirements of Article 5.7. 6.9 High temperature test
The test method is carried out in accordance with GB2423.2. The sample is placed in a constant temperature box and heated to 80℃, then heated to 120℃ at a rate of 2℃/min, kept warm for 4h, and the sample is taken out and placed in an environment of 20±5℃ for 2h. The test result shall comply with the provisions of Article 5.8. 6.10 Electrical life test
6.10.1 Test principle See Figure 3
6.10.2 Test method
JB/T 6740. 393
Plug the sample into the electrical life test bench, and the starter coil is energized for 1s and de-energized for 5s as a cycle. The coil current is adjusted to the maximum pull-in current value, 8A current passes between the contacts, and the power factor is 0.5. After 300,000 cycles of on-off test, it shall comply with the provisions of Article 5.9. However, it should also be removed for inspection at 10,000, 50,000, 100,000 and 200,000 cycles respectively, and the results should comply with the provisions of Article 5.9. Note: This test can be carried out under actual load. Inspection rules
Starter inspection is divided into factory inspection and type inspection. 7.1 Factory inspection
Products can only be shipped after passing the factory inspection. The items for factory inspection are shown in Table 2 and Table 3. 7.1.1 The performance items for factory inspection are shown in Table 2. According to the provisions of GB2828, the normal inspection and one-time sampling plan is adopted for inspection. The qualified quality level AQL and inspection level are shown in Table 2. If there are special requirements, they can also be determined by agreement between the manufacturer and the ordering party. Table 2
Appearance inspection
Overall dimensions
Marking inspection
Pick-up current
Release current
Plug-in and pull-out force
Chapters and clauses of this standard
Technical requirements
Test methods
Inspection level
-General inspection level I, normal inspection one sampling plan, 7.1.2 Safety items for factory inspection are shown in Table 3, and the sampling plan refers to GB2828, ~-However, as long as one item fails, the batch of products will be judged as unqualified. Table 3
7.2 Type inspection
Insulation voltage
Electrical strength
Type inspection should be carried out in the following cases: When new products are being trial-produced;
JB6740.1 chapters and articles
After formal production, when there are major changes in structure, materials, and processes that may affect product performance; when production is resumed after a six-month suspension;
For continuously produced products, once a year; when there is a major difference between the factory inspection results and the last type inspection; when the national quality supervision agency proposes a type inspection requirement: Note: The electric life test is only carried out in cases a and b. The specimens for type inspection should be randomly selected from the qualified batches. 7.2.2
Type inspection items include performance items and safety items. 7.2.3 The performance items, grouping sequence and number of samples for type inspection are shown in Table 4. According to the one-time sampling plan of GB2829 discrimination level 1, the unqualified quality level RQL=30 (sample size; n=3), the number of discrimination groups, Ae=0, Re=1, and the test is carried out in sequence. : The safety items, grouping sequence, number of samples and evaluation of type inspection shall be carried out in accordance with the provisions of JB6740.1, but the items that are the same as those in Table 4 shall not be tested repeatedly.
Packing box
Dimensions
Insert and extract force
Pick-up current
Release current
High temperature resistance
Electrical life
JB/T6740.3-93
Terms of this standard
Technical requirements
Test method
Number of samples
If the type inspection fails, the product shall be stopped from leaving the factory, and the reasons shall be analyzed immediately and the treatment methods shall be proposed until the new type inspection passes. Samples that have passed the type inspection shall not be shipped as qualified products. Marking, packaging, transportation, storage
The starter shall be clearly marked with the following contents at the appropriate position and comply with the relevant provisions of JB6740.1. a.
Manufacturer name or trademark;
Product model
8.2 Packaging
1 The packaging of the starter shall comply with the national standard "Packaging and Marking of Electrical Accessories and Controllers and Protectors for Household and Similar Purposes". 8.2.1
Qualification certificate. The small packaging box of the starter shall contain a cardboard partition or foam plastic box of appropriate dimensions, and shall be accompanied by a product manual and a product certificate. The product trademark, model, specification, production date, and quality inspection number shall be marked with non-fading pigments. The small packaging box shall be placed in a large packaging box made of corrugated paper. The large packaging box shall be firm and reliable, and have moisture-proof and vibration-proof measures. The outer wall of the large packaging box shall be marked with the following contents with non-interesting color paint: product name;
product model and specification;
product quantity:
gross weight;
volume: length x width x height;
moisture-proof, vibration-proof, lamination and other signs;
manufacturing date;
manufacturing unit name;
manufacturing unit mailing address.
8.3 Transportation
The packaged starter shall be suitable for transportation by any means of transport and shall be protected from heavy pressure, rain, falling, dropping and rolling. 8.4 Storage
JB/T6740.393
The packaged starter shall be stored in a well-ventilated warehouse with an ambient temperature of -10 to 40°C and a relative humidity of less than 80% (at 25°C). There shall be no corrosive, radioactive, flammable, explosive and toxic substances around it. Additional Notes:
This standard was proposed and managed by the National Technical Committee for Standardization of Electrical Accessories. This standard was drafted by the Guangzhou Electrical Science Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Yang Yangdai and Wang Yanxiang.4
The items listed in the table are not tested repeatedly.
Packing box
Dimensions
Plug-in and pull-out force
Pull-in current
Release current
High temperature resistance
Electrical life
JB/T6740.3-93
Terms of this standard
Technical requirements
Test methods
Number of samples
If the type inspection fails, the product shall be stopped from leaving the factory, and the reasons shall be analyzed immediately and the treatment methods shall be proposed until the new type inspection passes. Samples that have passed the type inspection shall not be shipped as qualified products. Marking, packaging, transportation, storage
The starter shall be clearly marked with the following contents at the appropriate position and comply with the relevant provisions of JB6740.1. a.
Manufacturer name or trademark;
Product model
8.2 Packaging
1 The packaging of the starter shall comply with the national standard "Packaging and Marking of Electrical Accessories and Controllers and Protectors for Household and Similar Purposes". 8.2.1
Qualification certificate. The small packaging box of the starter shall contain a cardboard partition or foam plastic box of appropriate dimensions, and shall be accompanied by a product manual and a product certificate. The product trademark, model, specification, production date, and quality inspection number shall be marked with non-fading pigments. The small packaging box shall be placed in a large packaging box made of corrugated paper. The large packaging box shall be firm and reliable, and have moisture-proof and vibration-proof measures. The outer wall of the large packaging box shall be marked with the following contents with non-interesting color paint: product name;
product model and specification;
product quantity:
gross weight;
volume: length x width x height;
moisture-proof, vibration-proof, lamination and other signs;
manufacturing date;
manufacturing unit name;
manufacturing unit mailing address.
8.3 Transportation
The packaged starter shall be suitable for transportation by any means of transport and shall be protected from heavy pressure, rain, falling, dropping and rolling. 8.4 Storage
JB/T6740.393
The packaged starter shall be stored in a well-ventilated warehouse with an ambient temperature of -10 to 40°C and a relative humidity of less than 80% (at 25°C). There shall be no corrosive, radioactive, flammable, explosive or toxic items around it. Additional Notes:
This standard was proposed and managed by the National Technical Committee for Standardization of Electrical Accessories. This standard was drafted by the Guangzhou Electrical Science Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Yang Yangdai and Wang Yanxiang.4
The items listed in the table are not tested repeatedly.
Packing box
Dimensions
Plug-in and pull-out force
Pull-in current
Release current
High temperature resistance
Electrical life
JB/T6740.3-93
Terms of this standard
Technical requirements
Test methods
Number of samples
If the type inspection fails, the product shall be stopped from leaving the factory, and the reasons shall be analyzed immediately and the treatment methods shall be proposed until the new type inspection passes. Samples that have passed the type inspection shall not be shipped as qualified products. Marking, packaging, transportation, storage
The starter shall be clearly marked with the following contents at the appropriate position and comply with the relevant provisions of JB6740.1. a.
Manufacturer name or trademark;
Product model
8.2 Packaging
1 The packaging of the starter shall comply with the national standard "Packaging and Marking of Electrical Accessories and Controllers and Protectors for Household and Similar Purposes". 8.2.1
Qualification certificate. The small packaging box of the starter shall contain a cardboard partition or foam plastic box of appropriate dimensions, and shall be accompanied by a product manual and a product certificate. The product trademark, model, specification, production date, and quality inspection number shall be marked with non-fading pigments. The small packaging box shall be placed in a large packaging box made of corrugated paper. The large packaging box shall be firm and reliable, and have moisture-proof and vibration-proof measures. The outer wall of the large packaging box shall be marked with the following contents with non-interesting color paint: product name;
product model and specification;
product quantity:
gross weight;
volume: length x width x height;
moisture-proof, vibration-proof, lamination and other signs;
manufacturing date;
manufacturing unit name;
manufacturing unit mailing address.
8.3 Transportation
The packaged starter shall be suitable for transportation by any means of transport and shall be protected from heavy pressure, rain, falling, dropping and rolling. 8.4 Storage
JB/T6740.393
The packaged starter shall be stored in a well-ventilated warehouse with an ambient temperature of -10 to 40°C and a relative humidity of less than 80% (at 25°C). There shall be no corrosive, radioactive, flammable, explosive or toxic items around it. Additional Notes:
This standard was proposed and managed by the National Technical Committee for Standardization of Electrical Accessories. This standard was drafted by the Guangzhou Electrical Science Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Yang Yangdai and Wang Yanxiang.
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