JB/T 10385-2002 Manual reset pressure type household and similar purposes
Some standard content:
ICS29.120
Machinery Industry Standard of the People's Republic of China JB/T 10385--2002
Pressure thermal cut-outs for household and similar use of manual reset type2002-12-27 Issued
2003-04-01 Implementation
Issued by the State Economic and Trade Commission of the People's Republic of China Foreword
1 Scope.
Normative reference documents.
3 Terms and definitions.
4 Models and main parameters
4.1 Product model..
4.2 Capillary length
5 Technical requirements
General requirements
Appearance requirements.
Action temperature characteristics
Manual reset function
Insulation resistance,
Electrical strength
Contact resistance,
Leakage current.
Environmental requirements
Terminal strength
Mounting stud strength
Automatic protection function,
5.13 Durability.
Heat resistance, flame resistance, tracking resistance
Marking wear resistance
Corrosion resistance
Test method||tt| |Test conditions
Appearance inspection
Action temperature characteristic test
Manual reset function test,
Insulation resistance
Electrical strength,
Contact resistance,
Leakage current test,
Environmental test
Terminal strength test
Mounting stud strength test.
Automatic protection function test
Durability test
JB/T10385—2002
JB/T 10385—2002
Heat resistance, flame resistance, leakage current tracking test
Marking wear resistance test
6.16 Corrosion resistance test.
7 Inspection rules.
Factory inspection,
Type inspection
8Marking, instruction manual, packaging, transportation, storage..Figure 1 Schematic diagram of terminal strength test
Cut-off temperature setting accuracy
Terminal axial force
Inspection items
Inspection and sampling number
JB/T10385---2002
The safety requirements of this standard are in accordance with GB14536.1-1998 "Household and similar electric automatic controllers Part 1: General requirements" and GB14536.10-1996 "Special requirements for temperature sensitive controllers of household and similar electric automatic controllers", and the performance requirements are formulated based on the domestic manufacturers' production practice experience for several years and user requirements. The writing format and expression rules of this standard are consistent with GB/T1.1-2000 "Guidelines for standardization work Part 1: Structure and writing rules of standards".
This standard is proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Household Automatic Controllers. The drafting units of this standard are: Foshan Tongbao Co., Ltd., Zhejiang Zhongyan Thermostat Co., Ltd., Guangzhou Electric Science Research Institute, Jiangsu Changheng Group, Foshan Jiulong Machinery (Thermostat) Factory. The main drafters of this standard are: Wang Bin, Chen Yonglong, Huang Kaiyun, Du Li, Zhu Jiulong, Zhuo Yun. II
1 Scope
Manual reset pressure type thermal cut-off for household and similar purposes JB/T10385--2002
This standard specifies the definition, model and basic parameters, technical requirements, test methods, inspection rules and signs, instruction manuals, packaging, transportation and storage of manual reset pressure type thermal cut-offs for household and similar purposes (hereinafter referred to as "thermal cut-offs"). This standard applies to temperature limiting devices whose working principle is that the pressure generated by the working fluid in the closed system is pushed by the snap-type actuator to disconnect the electrical contacts. This temperature limiting device is generally used for household and similar appliances such as water heaters, water boilers, drum washing machines, etc. with AC rated voltage not greater than 250V, rated current not greater than 32A, frequency 50Hz or 60Hz, cut-off temperature within any certain value of 80℃～200℃, resistive load electric energy heating, and requiring full-pole disconnection protection for the whole machine. Note: For thermal cut-off devices that exceed the cut-off temperature range of this standard, the requirements shall be agreed upon by the user and the manufacturer. 2 Normative reference documents
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated reference documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated reference documents, the latest versions shall apply to this standard. GB/T191 Packaging, storage and transportation graphic mark
GB/T2423.1 Environmental testing for electric and electronic products Part 2: Test methods Test A: Low temperature GB/T2423.2 Environmental testing for electric and electronic products Part 2: Test methods Test B: High temperature GB/T2423.3-1993 Basic environmental testing procedures for electric and electronic products Test Ca: Steady-state damp heat test method GB/T2423.5-1995 Environmental testing for electric and electronic products Part 2: Test methods Test Ea and guidelines: Impact GB/T2423.10-1995 Environmental testing for electric and electronic products Part 2: Test methods Test F c and guidelines: vibration (sinusoidal) GB/T2828-1987 Count sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches) GB/T2829-1987 Count sampling procedures and sampling tables for periodic inspection (applicable to inspection of production process stability) GB14536.1-1998 Household and similar electric automatic controllers Part 1: General requirements JB/T5660 Packaging and marking of electrical accessories, controllers and protectors for household and similar purposes JB/T8967-1999 Pressure temperature controllers for household and similar purposes 3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
Manual reset pressure thermal cut-outs pressurethermalcut-outs ofmanualresettype consist of two parts: protective temperature package assembly and switch box. The working fluid in the protective temperature package generates pressure when heated, causing the diaphragm to jump, and the push rod quickly pushes the switch to disconnect all poles, cutting off the two poles of the single-phase circuit, stopping the system heating, and preventing the temperature from continuing to rise. After the switch is actuated, it must be manually reset under certain conditions. 3.2
Cut-out temperature When the measured medium reaches the temperature setting value, the thermal cut-out device instantly cuts off the power supply, and the temperature sensed by the temperature sensing part. 3.3
Manual resetmanual reset
After the thermal cut-out device is disconnected, it must be manually restored to be connected again, that is, manual resetJB/T10385—2002
Automatic protectionautomatic protectionThe thermal cut-out device is in the connected state. When the working fluid leaks in the power component, the power component can automatically disconnect the thermal cut-out device, and it will no longer work normally, and the manual reset function will fail. Model and main parameters
4.1 Product model
Product model is expressed in the following order:
4.2 Capillary length
Enterprise customization part, set 1 to 3 digits or letters as needed to represent the installation form, capillary length, terminal size and other parameter codes Cut-off temperature, expressed by the disconnection temperature value
Manual reset
Thermal cut-off device
Pressure temperature control type
Recommended capillary length: 450mm, 600mm, 800mm, 1000mm. Special length is agreed upon by the user and the manufacturer. 5 Technical requirements
5.1 General requirements
5.1.1 Use environment
The vibration should not be greater than 9.8m/s2.
There is no flammable or explosive gas in the surrounding air. There is no strong corrosive gas and conductive dust. 5.1.2 Normal use conditions
Atmospheric pressure 80kPa ~ 105kPa.
Relative humidity is not more than 95%.
Power supply is AC 250V, resistive load, current is not more than 32A. 5.1.2.4
When in use, the length of the temperature sensing part placed in the measured medium is not less than 150mm. Main body installation temperature: -30℃ ~ +85℃. The temperature at the main body installation should be more than 25℃ lower than the temperature sensing part. Requirements exceeding the main body installation temperature range 5.1.2.51
shall be resolved through consultation between the user and the manufacturer. 5.2 Appearance requirements
5.2.1 The appearance of the thermal cut-out is good, the parts have no obvious defects, the capillary is not damaged, the terminals are firm, and the nameplate is clear. 5.2.2 The plastic parts are smooth and flat, without cracks, pores and shrinkage holes. 5.3 Action temperature characteristics
See Table 1 for the setting accuracy of the cut-out temperature.
Table 1 Cut-out temperature setting accuracy
Cut-out temperature range ℃
Setting accuracy K
5.4 Manual reset function
80≤≤100
When manually resetting, the temperature of the temperature-sensitive part must be below 40℃. The reset force should not be greater than 20N. 2
100T≤200
±5%×T
5.5 Insulation resistance
Under normal conditions, it should not be less than 100M2.
5.6 Electrical strength
JB/T10385—2002
a) Under normal conditions, the terminals of the thermal cut-out and the mounting frame (or power component) should be able to withstand a 50Hz, sine wave AC voltage of 1500V for 1min or 1800V for 1s, and there should be no breakdown or flashover. b) Under normal conditions, the open-circuit terminals of the same pole should be able to withstand a 50Hz, sine wave AC voltage of 600V for 1min or 750V for 1s, and there should be no breakdown or flashover.
5.7 Contact resistance
Should not be greater than 50m2.
5.8 Leakage current
Under the condition of the maximum allowable operating temperature of the main body, 1.06 times the rated voltage is applied between the terminal and the mounting frame, and the leakage current should not be greater than 0.25mA.
5.9 Environmental requirements
5.9.1 After the environmental test, the performance of the thermal cut-out shall meet the following requirements: the insulation resistance between the terminal and the mounting frame shall not be less than 10M2; and it shall be able to withstand 50Hz, sine wave AC voltage of 1250V, for 1min, and there shall be no breakdown and flashover phenomenon; the change of the cut-off temperature characteristic to the initial value of the test is ±5K below 100℃ and ±5%K above 100℃.
5.9.2 Moisture and heat resistance:
shall meet the requirements of 5.9.1.
5.9.3 Low temperature resistance:
shall meet the requirements of 5.9.1.
5.9.4 High temperature resistance:
shall meet the requirements of 5.9.1.
5.9.5 Impact resistance:
shall meet the requirements of 5.9.1.
5.9.6 Vibration resistance:
Should meet the requirements of 5.9.1.
5.9.7 Single-piece drop:
Should meet the requirements of 5.9.1.
5.10 Terminal strength
After the test, the terminals should be free of damage and bending or looseness that affects the use, and the insulation should not be damaged. 5.11 Mounting stud strength
The thread diameter of the mounting stud shall not be less than 8mm, and the thread shall be able to withstand a torque of 1.8N·m. After a torque test lasting 5s, there should be no damage. 5.12 Automatic protection function
When the thermal cut-out is in the on state, if the power component is damaged and causes the working fluid to leak, the power component can automatically operate to put the thermal cut-out in the off state, and the manual reset function shall be invalid. 5.13 Durability
After the thermal cut-out is tested 1000 times at full load under rated voltage and rated current, the insulation resistance shall be above 10MQ, the electrical strength shall comply with the provisions of 5.6, and the manual reset push rod shall operate normally. For products with an initial test value below 100°C, the change in disconnection temperature characteristics shall not exceed 5%K of the initial test value; for products with an initial test value above 100°C, the change in disconnection temperature characteristics shall not exceed 5%K of the initial test value, and no other mechanical or electrical failures shall occur.
5.14 Heat resistance, flame resistance, and tracking resistance
The insulating material components of the thermal cut-out shall comply with the relevant test requirements of GB14536.1-1998, among which the tracking resistance test voltage shall not be less than 175V.
5.15 Wear resistance of markings
The markings on the thermal cut-outs shall be clearly visible and not fall off after the test. 5.16 Corrosion resistance
According to the provisions of 5.2.20 in JB/T8967-1999, 6 Test methods
6.1 Test conditions
6.1.1 Test environment
Except for special requirements.
6.1.1.1 Ambient temperature: 25℃±5℃. 6.1.1.2 Relative humidity: 45%～~85%. 6.1.1.3 Standard test atmospheric pressure 101.32kPa. Under other atmospheric pressures, action temperature correction must be performed. 6.1.2. Requirements for main measuring instruments and equipment 6.1.2.1 Accuracy of electrical instruments
Type inspection shall not be less than Class 0.5, and factory inspection shall not be less than Class 1.0. 6.1.2.2 Graduation value of thermometer
Type inspection should be no more than 0.1℃, and factory inspection should be no more than 0.2℃. 6.1.2.3 Temperature test device
Temperature field average, deviation should be no more than 0.2℃, temperature change rate, liquid medium should be no more than 1℃/min, gas medium should be no more than 0.5℃/min.
6.2 Appearance inspection
Visual inspection and inspection with general and special measuring tools 6.3 Action temperature characteristic test
Under the test conditions, immerse the temperature sensing part of the thermal cut-out in the medium of the temperature test tank. The thermal cut-out is initially in the on state. When the temperature of the medium in the temperature test tank rises to the point where the contact is disconnected, record the disconnection temperature value. When the temperature of the temperature sensing part drops below 40℃, manually reset, the thermal cut-out is turned on, and the test is repeated four times in a row. The maximum value of the difference between the disconnection temperature and the nominal disconnection temperature in the last three times is the action temperature accuracy. 6.4 Manual reset function test
According to the test method in 6.3, the maximum value of the force applied by the end face of the reset rod when the reset is connected in the last three tests is the manual reset force value. 6.5 Insulation resistance
According to the test method in 13.1 of GB14536.1-1998, use a DC 500V megohmmeter to measure between the terminal of the thermal cut-out and the mounting frame. 6.6 Electrical strength
According to the test method in 13.2 of GB14536.1-1998, apply the voltage specified in 5.6 b) between the terminal of the thermal cut-out and the mounting frame (or power component) and between the terminals of the same pole in the disconnected state. 6.7 Contact resistance
The thermal cut-out is adjusted to the connected state, and the contact resistance between the two pairs of terminals is measured by the volt-ampere method. The larger value is taken as the contact resistance of the thermal cut-out.
6.8 Leakage current test
According to the leakage current test method in 13.3 of GB14536.1-1998, apply the specified voltage between the terminal and the mounting frame under the condition of the maximum allowable working temperature of the main body.
6.9 Environmental test
6.9.1 Damp heat test
According to the provisions of GB/T2423.3-1993, the thermal cut-out in the on state is placed in a constant temperature and humidity chamber with a temperature of 40℃±2℃ and a relative humidity of 90% to 95% for 48 hours. After that, the insulation resistance and electrical strength are tested in the chamber, and then taken out of the chamber and placed for not less than 1 hour to check the operating temperature characteristics, which should meet the requirements of 5.9.2.
6.9.2 Low temperature test
According to GB/T2423.1, the thermal cut-out is placed in a constant temperature box at 30℃±3℃, and kept for 16 hours after the temperature stabilizes, and then taken out and placed for no less than 1 hour to check the performance, which shall meet the requirements of 5.9.3. 6.9.3 High temperature test
According to GB/T2423.2, the thermal cut-out is placed in a constant temperature box at 95℃±2℃ for 16 hours, and then taken out and placed for no less than 1 hour to check the performance, which shall meet the requirements of 5.9.4.
6.9.4 Impact test
According to the procedure specified in GB/T2423.5-1993, the thermal cut-out is subjected to an acceleration of 500m/s, and impacts are made in the three directions of up and down, left and right, and front and back, and the performance is checked, which shall meet the requirements of 5.9.5. During the test, the thermal cut-out body and temperature sensing components shall be fixed in appropriate positions. 6.9.5 Vibration test
According to the procedure specified in GB/T2423.10-1993, the thermal cut-out is subjected to vibration with a variable frequency of 10Hz~55Hz, an amplitude of 1mm, a reciprocating time of 5min, and a duration of 1h in each of the three directions of up and down, left and right, and front and back. Check the performance. It should meet the requirements of 5.9.6. During the test, the thermal cut-out body and temperature sensing components should be fixed in appropriate positions. 6.9.6 Single-piece drop test
The thermal cut-out is freely dropped from a height of 600mm onto a solid horizontal surface such as cement floor, stone or steel plate, and dropped once in the up, down, left, right, front and back directions respectively. Check the performance. It should meet the requirements of 5.9.7. 6.10 Terminal strength test
Fix the main body, slowly apply the pulling force and pushing force shown in Table 2 along the axial direction of the terminal once, hold for 1s, and then use a pushing force of 10N to apply force in four directions perpendicular to the axial direction at the outer end of the terminal respectively, and continue for 5s, see Figure 1. Check whether it meets the requirements of 5.10. Table 2 Terminal axial force
Terminal size mm
Thrust N
Tension N
6.11 Installation stud strength test
Pushing force
Pushing force
Axial force
Pushing force
Pushing force
Figure 1 Schematic diagram of terminal strength test
Fix the thermal cut-out body, put the nut on the stud, tighten the nut with a torque wrench to a torque of 1.8N·m±0.15N·m, hold for 5s, and there should be no collapse, breakage, nut slippage, etc. 6.12 Automatic protection function test
Under the test conditions, the thermal cut-out is adjusted to the on state, and the sinusoidal AC rated voltage and the rated current of the resistive load are applied. The thermal cut-out S
JB/T10385—2002
power component of the thermal cut-out is placed in the air, and the capillary of the power component is cut off to observe whether the thermal cut-out can disconnect the circuit instantly. After the thermal cut-out is actuated, the manual reset push rod is operated to observe whether the switch can be reset. 6.13 Durability test
Under the test conditions, the thermal cut-out is adjusted to the on state, and the sinusoidal AC rated voltage and the rated current of the resistive load are applied. By heating and cooling the liquid medium or gas medium where the temperature sensing component is located, the thermal cut-out switch is disconnected to meet the conditions required for manual reset (below 40°C). After completing the specified number of opening and closing times, check the relevant items according to 5.13. 6.14 Heat resistance, flame resistance and tracking resistance test According to the requirements of Chapter 21 of GB14536.1-1998, the insulator of the thermal cut-off switch is subjected to heat resistance, flame resistance and tracking resistance test. 6.15 Marking wear resistance test
Inspect according to Appendix A of 7.4.1 of GB14536.1-1998. 6.16 Corrosion resistance test
Test according to 6.2.20 of JB/T8967-1999, and then judge according to 5.16. 7 Inspection rules
7.1 Factory inspection
Factory inspection is to select samples from the same batch of qualified products submitted by the production workshop according to the normal inspection one-time sampling plan of GB/T2828-1987. The inspection level and qualified quality level are specified in Table 3. Table 3 Inspection items
Type inspection
Inspection content
Action temperature characteristics
Insulation resistance
Electrical strength
Contact resistance
Technical requirements
Type inspection shall be carried out in one of the following cases: a)
Before putting a new product into production;
For continuously produced products, at least once every two years; when reproducing with an interval of more than one year;
Test method
When there are major changes in the design, structure, process and materials: e)
When the national quality supervision agency makes a request. Inspection level
Importance classification
Samples for type inspection are randomly sampled from products that have passed the factory inspection according to the secondary sampling plan for level I in GB/T2829-1987. The number of samples is specified in Table 4. In addition, n1=n2=5 samples of plastic switch bases and ni=n2=5 samples of anti-rust parts are selected from the parts that have passed the factory inspection.
Table 4 Inspection and sampling number
Group 1
Test items
Action temperature characteristics
Manual reset function
Technical requirements
Test methods
Sampling number
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Test items
Contact resistance
Terminal strength
Mounting stud strength| |tt||Marking Wear resistance
Insulation resistance
Electrical strength
Leakage current
Automatic protection
Single piece drop
Durability
Heat resistance, flame resistance, tracking resistance
Corrosion resistance
7.2.3 Sampling method:
Table 4 (continued)
Technical requirements
Test method
Sampling number
Plastic switch base 5
Rust-proof parts 5
JB/T 10385---2002
Table 4 specifies the items and grouping methods for type inspection. The tests are carried out in sequence of serial numbers and the test results are judged according to the unqualified quality level RQL value specified in Table 4.
8 Marking, instruction manual, packaging, transportation, storage 8.1 Marking, instruction manual, packaging, transportation, storage shall comply with the provisions of JB/T5660. 8.2 When the thermal cut-out leaves the factory, a nameplate shall be marked in an appropriate position. The nameplate shall have the following contents: a) Manufacturer's name or trademark;
b) Product name or model:
8.3 The thermal cut-out shall be packed in a packaging box together with the inspection certificate. The certificate shall have the following markings: a)
Manufacturer's name or trademark;
b) Product name and model;
Inspector code:
Date of shipment.
8.4 The thermal cut-out shall be accompanied by an instruction manual, which shall include the following contents: a)
Manufacturer name and address;
Product name and model specifications;
Actuation temperature characteristics;
Rated voltage, current and switch type;
JB/T 10385—2002
Usage temperature conditions;
Insulation resistance and electrical strength:
Durability;
Appearance and installation dimensions;
Common sense for use, maintenance and storage;
Implementation standard number.
The thermal cut-out packaging box shall meet the following requirements 8.5
The packaging box shall be equipped with moisture-proof and rain-proof devices.
The following markings should be on the outer surface of the packaging box:
Manufacturer name and address;
Product name and model;
Product batch number;
Net weight and gross weight;
Volume (length × width × height);
Factory date;
Marks such as "fragile items", "rainproof", and "precision instruments" should be in compliance with the relevant provisions of GB/T191. 8.6 Avoid heavy pressure, moisture, heat, exposure to the sun, rain and snow during transportation. 8.7
After packaging, the thermal cut-out should be stored in a room with a relative humidity of less than 85%, no corrosive gases, and good ventilation.16 Determination, 7 Inspection rules
7.1 Factory inspection
Factory inspection is to select samples from the same batch of products submitted by the production workshop and tested and qualified according to the normal inspection sampling plan of GB/T2828-1987. The inspection level and qualified quality level are specified in Table 3. Table 3 Inspection items
Type inspection
Inspection content
Action temperature characteristics
Insulation resistance
Electrical strength
Contact resistance
Technical requirements
Type inspection is carried out in one of the following situations: a)
Before putting into production a new product;
Continuously producing products, not less than once every two years; when reproducing with an interval of more than one year;
Test method
When there are major changes in design, structure, process and materials: e)
When the national quality supervision agency makes a request. Inspection level
Importance classification
Samples for type inspection are randomly sampled from products that have passed the factory inspection according to the secondary sampling plan for level I in GB/T2829-1987. The number of samples is specified in Table 4. In addition, n1=n2=5 samples of plastic switch bases and ni=n2=5 samples of anti-rust parts are selected from the parts that have passed the factory inspection.
Table 4 Inspection and sampling number
Group 1
Test items
Action temperature characteristics
Manual reset function
Technical requirements
Test methods
Sampling number
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Test items
Contact resistance
Terminal strength
Mounting stud strength| |tt||Marking Wear resistance
Insulation resistance
Electrical strength
Leakage current
Automatic protection
Single piece drop
Durability
Heat resistance, flame resistance, tracking resistance
Corrosion resistance
7.2.3 Sampling method:
Table 4 (continued)
Technical requirements
Test method
Sampling number
Plastic switch base 5
Rust-proof parts 5
JB/T 10385---2002
Table 4 specifies the items and grouping methods for type inspection. The tests are carried out in sequence of serial numbers and the test results are judged according to the unqualified quality level RQL value specified in Table 4.
8 Marking, instruction manual, packaging, transportation, storage 8.1 Marking, instruction manual, packaging, transportation, storage shall comply with the provisions of JB/T5660. 8.2 When the thermal cut-out leaves the factory, a nameplate shall be marked in an appropriate position. The nameplate shall have the following contents: a) Manufacturer's name or trademark;
b) Product name or model:
8.3 The thermal cut-out shall be packed in a packaging box together with the inspection certificate. The certificate shall have the following markings: a)
Manufacturer's name or trademark;
b) Product name and model;
Inspector code:
Date of shipment.
8.4 The thermal cut-out shall be accompanied by an instruction manual, which shall include the following contents: a)
Manufacturer name and address;
Product name and model specifications; www.bzxz.net
Actuation temperature characteristics;
Rated voltage, current and switch type;
JB/T 10385—2002
Usage temperature conditions;
Insulation resistance and electrical strength:
Durability;
Appearance and installation dimensions;
Common sense for use, maintenance and storage;
Implementation standard number.
The thermal cut-out packaging box shall meet the following requirements 8.5
The packaging box shall be equipped with moisture-proof and rain-proof devices.
The following markings should be on the outer surface of the packaging box:
Manufacturer name and address;
Product name and model;
Product batch number;
Net weight and gross weight;
Volume (length × width × height);
Factory date;
Marks such as "fragile items", "rainproof", and "precision instruments" should be in compliance with the relevant provisions of GB/T191. 8.6 Avoid heavy pressure, moisture, heat, exposure to the sun, rain and snow during transportation. 8.7
After packaging, the thermal cut-out should be stored in a room with a relative humidity of less than 85%, no corrosive gases, and good ventilation.16 Determination, 7 Inspection rules
7.1 Factory inspection
Factory inspection is to select samples from the same batch of products submitted by the production workshop and tested and qualified according to the normal inspection sampling plan of GB/T2828-1987. The inspection level and qualified quality level are specified in Table 3. Table 3 Inspection items
Type inspection
Inspection content
Action temperature characteristics
Insulation resistance
Electrical strength
Contact resistance
Technical requirements
Type inspection is carried out in one of the following situations: a)
Before putting into production a new product;
Continuously producing products, not less than once every two years; when reproducing with an interval of more than one year;
Test method
When there are major changes in design, structure, process and materials: e)
When the national quality supervision agency makes a request. Inspection level
Importance classification
Samples for type inspection are randomly sampled from products that have passed the factory inspection according to the secondary sampling plan for level I in GB/T2829-1987. The number of samples is specified in Table 4. In addition, n1=n2=5 samples of plastic switch bases and ni=n2=5 samples of anti-rust parts are selected from the parts that have passed the factory inspection.
Table 4 Inspection and sampling number
Group 1
Test items
Action temperature characteristics
Manual reset function
Technical requirements
Test methods
Sampling number
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Test items
Contact resistance
Terminal strength
Mounting stud strength| |tt||Marking Wear resistance
Insulation resistance
Electrical strength
Leakage current
Automatic protection
Single piece drop
Durability
Heat resistance, flame resistance, tracking resistance
Corrosion resistance
7.2.3 Sampling method:
Table 4 (continued)
Technical requirements
Test method
Sampling number
Plastic switch base 5
Rust-proof parts 5
JB/T 10385---2002
Table 4 specifies the items and grouping methods for type inspection. The tests are carried out in sequence of serial numbers and the test results are judged according to the unqualified quality level RQL value specified in Table 4.
8 Marking, instruction manual, packaging, transportation, storage 8.1 Marking, instruction manual, packaging, transportation, storage shall comply with the provisions of JB/T5660. 8.2 When the thermal cut-out leaves the factory, a nameplate shall be marked in an appropriate position. The nameplate shall have the following contents: a) Manufacturer's name or trademark;
b) Product name or model:
8.3 The thermal cut-out shall be packed in a packaging box together with the inspection certificate. The certificate shall have the following markings: a)
Manufacturer's name or trademark;
b) Product name and model;
Inspector code:
Date of shipment.
8.4 The thermal cut-out shall be accompanied by an instruction manual, which shall include the following contents: a)
Manufacturer name and address;
Product name and model specifications;
Actuation temperature characteristics;
Rated voltage, current and switch type;
JB/T 10385—2002
Usage temperature conditions;
Insulation resistance and electrical strength:
Durability;
Appearance and installation dimensions;
Common sense for use, maintenance and storage;
Implementation standard number.
The thermal cut-out packaging box shall meet the following requirements 8.5
The packaging box shall be equipped with moisture-proof and rain-proof devices.
The following markings should be on the outer surface of the packaging box:
Manufacturer name and address;
Product name and model;
Product batch number;
Net weight and gross weight;
Volume (length × width × height);
Factory date;
Marks such as "fragile items", "rainproof", and "precision instruments" should be in compliance with the relevant provisions of GB/T191. 8.6 Avoid heavy pressure, moisture, heat, exposure to the sun, rain and snow during transportation. 8.7
After packaging, the thermal cut-out should be stored in a room with a relative humidity of less than 85%, no corrosive gases, and good ventilation.5
The packaging box should be equipped with moisture-proof and rain-proof devices.
The outer surface of the packaging box should have the following signs:
Manufacturer name and address;
Product name and model;
Product batch number;
Net weight and gross weight;
Volume (length × width × height);
Factory date;
With "fragile items", "rainproof", "precision instrument" and other marks, and comply with the relevant provisions of GB/T191. 8.6 Avoid heavy pressure, moisture, heat, exposure, rain and snow during transportation. 8.7
After packaging, the thermal cut-out should be stored in a room with a relative humidity of less than 85%, no corrosive gas and good ventilation.5
The packaging box should be equipped with moisture-proof and rain-proof devices.
The outer surface of the packaging box should have the following signs:
Manufacturer name and address;
Product name and model;
Product batch number;
Net weight and gross weight;
Volume (length × width × height);
Factory date;
With "fragile items", "rainproof", "precision instrument" and other marks, and comply with the relevant provisions of GB/T191. 8.6 Avoid heavy pressure, moisture, heat, exposure, rain and snow during transportation. 8.7
After packaging, the thermal cut-out should be stored in a room with a relative humidity of less than 85%, no corrosive gas and good ventilation.
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