This chapter in GB4706.1-1998 is replaced by the following content. This standard applies to the safety of vacuum cleaners and suction cleaning appliances for household and similar purposes, including vacuum cleaners for animal cleaning. Its rated voltage should not exceed 250V. This standard also applies to central vacuum cleaners. This standard also applies to special vacuum cleaners with powered cleaning heads and current-carrying hoses. Vacuum cleaners that are not intended for general household use but may pose a danger to the public, such as vacuum cleaners used by non-professionals in shops and other vacuum cleaners with general household use, are also included in the scope of this standard. Note 1: For example, vacuum cleaners intended for general household use in hotels, offices, schools, hospitals and similar situations. As a practical matter, this standard covers vacuum cleaners that are in the home and may be encountered by all persons, and that pose a hazard to the public. This standard does not generally take into account: - the use of vacuum cleaners by unsupervised children or infirm persons; - the use of vacuum cleaners as toys by children. GB 4706.7-1999 Special requirements for safety vacuum cleaners and water-suction cleaners for household and similar electrical appliances GB4706.7-1999 Standard download and decompression password: www.bzxz.net

GB4706.7-1999
Foreword
This standard is equivalent to IEC60335-2-2: 1993 Supplement "Safety of Household and Similar Electrical Appliances Part 2: Vacuum Cleaners
"Special Requirements for Water-Suction Cleaners" and Supplement No. 1 of 1998 and Supplement No. 2 of 1999. This standard should be used in conjunction with GB4706.1-1998 "General safety requirements for household and similar electrical appliances". The parts of this standard that say "applicable" mean that the corresponding provisions in GB4706.1-1998 are applicable to this standard. The parts of this standard that say "replace" should be subject to the provisions of this standard. The provisions in this standard shall prevail. The part marked "Added" means that in addition to the corresponding provisions in GB4706.1-1998, it must also comply with the added provisions in this standard. This standard is mainly revised in the following aspects: the name of the standard and the scope of Chapter 1 are further clarified to include water suction cleaners; 2.2.101 water suction cleaner and 2.2.102 booster device are added to the definition of Chapter 2; Chapter 19 Add additional tests in 19.101 and 19.102; Chapter 22 adds that water-absorbing cleaners should use an all-pole disconnect switch: - Add Appendix C motor aging test.
This standard will replace GB4706.7-1986 from the date of implementation. This standard is proposed and administered by the National Technical Committee for Standardization of Household Electrical Appliances. This standard was drafted by China Household Electrical Appliances Research Institute. The main drafters of this standard: Liu Qing, Wang Huirong, Li Xianli, Xu Li. This standard is entrusted to the National Technical Committee for Standardization of Household Electrical Appliances to be responsible for interpretation. GB4706.7—1999
IEC Preface
1) IEC (International Electrotechnical Commission) is an international standardization organization composed of all national electrotechnical committees (IEC National Committees). Its purpose is to promote the International cooperation on standardization issues in the electronic field. To this end, IEC carries out international standardization activities and publishes international standards. The development of these standards is entrusted to technical committees. Any IEC National Committee interested in the technical issues may also participate in the development work. International, governmental and non-governmental organizations associated with the IEC may also participate in this work. IEC works closely with the International Organization for Standardization (ISO) on the basis of agreements between the two organizations. 2) Formal IEC resolutions or agreements on technical issues formulated by technical committees in which all national committees with a special interest in the issue participate represent, as far as possible, an international consensus on the issues involved. 3) These formal resolutions or agreements are published in the form of standards, technical reports or guidelines and are accepted by the national committees in this sense.
4) In order to achieve international consensus, the IEC National Committee agrees to use IEC international standards to the greatest extent possible in its national and regional standards. Differences between IEC standards and corresponding national or regional standards shall be clearly marked in the latter. 5) IEC has not established procedures for accreditation marks. When a piece of equipment should be said to comply with a certain standard of IEC, IEC will not be responsible for it.
This standard was developed by IEC Technical Committee 61 (Safety of Household and Similar Electrical Appliances). This standard constitutes the 4th edition of IEC60335-2-2, replacing its 3rd edition and its Supplement 1 and Supplement 2. This standard is based on the following documents:
DIS
61(CO)749 and 749A
Voting Report
61(CO)773
About this All material at the time of adoption of the standard can be found in the vote report shown above. This standard should be used in conjunction with the latest version of IEC60335-1 and its supplements. This standard is developed based on the 3rd edition (1991) of IEC60335-1.
This standard adds or modifies the corresponding clauses of IEC60335-1, thus transforming them into this standard: Special requirements for vacuum cleaners and water-suction cleaners.
IEC60335-1 clauses not mentioned in this standard can be used as long as they are reasonable. The places marked with "addition", "modification" or "replacement" in this standard refer to corresponding modifications to the relevant provisions of IEC60335-1. Note
1 This standard uses the following printing fonts: - The content of the requirements is in regular fonts, the content of
the test specifications is in italics,
- the content of the notes is in small size Traditional Chinese characters.
Bold words in the text are defined in Chapter 2. 2. The numbers of clauses and diagrams added to this standard start from 101. The following differences exist in some countries:
- 2.2.9 Normal operation has different handling and should include contact between the nozzle and the carpet (USA). - Chapter 3 Restrictions on the use of DC components in the neutral conductor of appliances (Australia). —6.1 Class 0 appliances are allowed (Canada, Japan, United States). Household vacuum cleaners should be Class I or Class II appliances (Denmark, France, Italy, Netherlands, Norway and Turkey) GB 4706.7-1999
IPX4 is not required (USA).
6.2
7.1 No additional markings are required near the appliance outlet (United States). —10.1
-11.5
11.7
input power boost device is considered (USA). During the test, the booster device is activated for 2 minutes every 8 minutes (USA). Tests are performed with uncoiled 1/3 of the wire until steady state is established (USA). Disposition of tests varies (USA).
—15.2
Tests are treated differently (US).
-16.3
21.101
21.102
21.103
21.104
25.1
25.7
15.2| |tt||-19.7
19.9
Testing arrangements are different (Canada and the United States). The testing is scheduled differently (Canada and the United States). The testing is scheduled differently (Canada and the United States). This test is not performed (USA).
If the appliance has locking input and output sockets, a power cord is not required (USA). Livestock cleaners allow the use of ordinary PVC sheathed wire (Australia). Lighter flexible cables are allowed for household vacuum cleaners (USA). Using different testing methods (USA). Use different test methods (USA). Perform overload test (USA).
20.101
22.104
uses a different basis (United States).
This test is not performed (USA).
1 Scope
National Standard of the People's Republic of China
Safety of Household and Similar Electrical Appliances
Special Requirements for Vacuum Cleaners and Suction Cleaners
|tt||Safety of household and similar electrical appliancesParticular requirements
for vacuum cleaners and water suction cleaning appliances This chapter in GB4706.1-1998 is replaced by the following content. GB4706.7—1999
idtIEC60335-2-2:1993
replaces GB4706.7—1986
This standard applies to the safety of vacuum cleaners and water-absorbing cleaning appliances for household and similar purposes, including vacuum cleaners for animal cleaning. Its rated voltage should not exceed 250V. This standard also applies to central vacuum cleaners. This standard also applies to special vacuum cleaners with powered cleaning heads and current-carrying hoses. Vacuum cleaners that are not intended for general household use but may pose a danger to the public, such as vacuum cleaners used by non-professionals in shops and other vacuum cleaners with general household use, are also included in the scope of this standard. Note 1: For example, vacuum cleaners intended for general household use in hotels, offices, schools, hospitals and similar situations. As a practical matter, this standard covers vacuum cleaners that are in the home and may be encountered by all persons, and that pose a hazard to the public. This standard does not generally consider:
The use of vacuum cleaners by unsupervised children or infirm persons; Vacuum cleaners used as toys by children.
Note
The following facts should draw attention:
2
Vacuum cleaners used on vehicles, ships and aircraft may have additional requirements when necessary. In tropical areas The use of vacuum cleaners may, if necessary, have additional requirements; in many countries, additional requirements are laid down by the national health authorities, the authorities responsible for national labor protection, the national water supply and similar authorities. 3 This standard does not apply to:
An appliance vacuum cleaner equipped with a heating element; a vacuum cleaner specially designed for industrial purposes; a vacuum cleaner intended for use in special environments, such as the presence of corrosive gases or explosive gases (dust, steam or gas) environment. 2 Definition
This chapter in GB4706.1-1998 is applicable except for the following content. 2.2.4 Added:
Note: For vacuum cleaners equipped with a booster device, the rated input power corresponds to the working state when the booster device is not working. 2.2.9 Replacement:
normal operation
The vacuum cleaner is powered at the rated voltage. After 20 seconds of continuous operation, the input power P obtained by adjusting the suction port is used. If necessary, wait 3 minutes before the National Bureau of Quality and Technical Supervision approved the implementation on 2000-05-01 on November 11, 1999
to adjust the suction nozzle.
P. Calculate according to the following formula:
GB4706.7—1999
Pm=0. 5(P,+P,)
When the suction port is spread Below, the input power measured after the vacuum cleaner works continuously for 3 minutes, W. Any device providing a protective air flow to cool the motor is allowed to operate if the suction port is closed. P, one—the input power measured when the vacuum cleaner works continuously for 20 seconds with the suction port closed, W. If the suction opening is closed, any device that provides a protective air flow to cool the motor is not allowed to operate. If the vacuum cleaner is marked with a rated voltage range. If the tolerance of the rated voltage range does not exceed 10% of the average value of the voltage range, the average value of the rated voltage range is used for power supply; if the tolerance of the rated voltage range exceeds 10% of the average value of the voltage range, use Supply power at the upper limit of the rated voltage range.
During the test, the vacuum cleaner should be equipped with a clean dust filter and dust collection bag, and any container for collecting liquids should be empty. If your vacuum uses only one hose, remove the detachable nozzle and straw and unfold and straighten the hose. If the vacuum cleaner comes with a spare hose, do not use this hose.
Rotating brushes and similar devices should work but must not come into contact with any surface. The power cleaning head should be attached to the hose and working, but not in contact with any surface. www.bzxz.net
The leads of other accessories of the vacuum cleaner that are loaded with resistive loads are consistent with the markings. 2.2.101 Water suction cleaner
watersuctioncleaningappliances are used to absorb appliances that may contain foaming detergent aqueous solutions. 2.2.102 Booster device boostersetting When the device is working, it can be controlled to generate a temporarily higher input power. When the device is not working, the input power can be automatically reduced to the specified value.
2.2.103 Centrally-sitedvacuumcleaner A vacuum cleaner connected to a building's ventilation system. Note: When in use, the nozzle and its connecting hose are connected to the air inlet of the ventilation system. 3 General requirements
This chapter in GB4706.1-1998 applies. 4 General conditions for testing
The contents of this chapter in GB4706.1-1998 are applicable except for the following contents. Added:
4.2
Tests 21.101 to 21.104, each using a new hose. 4.101 Current-carrying hoses operating at safety extra-low voltage are not subject to these tests. 5 Empty Chapter
6 Classification
This chapter in GB4706.1-1998 is applicable except for the following content. 6.1 Instead of:
Vacuum cleaners and suction cleaners shall be Class, Class I or Heavy Class appliances. Vacuum cleaners used for animal cleaning shall be Class I or Class I appliances. Compliance is determined by inspection and relevant tests. 6.2 Addition:
GB 4706.7—1999
The waterproof level of vacuum cleaners and water-suction cleaners used for animal cleaning should be at least IPX4. 7 Markings and Instructions
GB4706.1—1998 Except for the following content in this chapter, all applicable. 7.1 Addition:
Appliances should be marked with the maximum load (W) of the accessory lead wire. Note: This mark should be close to the lead wire of the appliance. The rated total input power of the vacuum cleaner and the maximum load of the lead wire of the appliance should also be marked on the appliance. The power cleaning head should be marked with the following content:
a rated voltage or rated voltage range (V); rated input power (W);
the name, trademark or identification mark of the manufacturer or agent ;Model or reference type.
Added in 7.12:
If the vacuum cleaner is equipped with a current-carrying hose (other than a current-carrying hose operating under safety extra-low voltage), its operating instructions should include the following:||tt ||WARNING: This hose includes electrical connections.
cannot be used to absorb water;
cannot be immersed in water for cleaning;
The hose should be checked regularly. If it is damaged, it is prohibited to use it. 7.12.1 Added:
Instructions for vacuum cleaners and suction cleaners with rotating brushes and similar devices should indicate that the user should unplug the plug from the socket before cleaning or maintaining the appliance.
8 Protection against contact with live parts
This chapter in GB4706.1-1998 is applicable except for the following content. 8.1.1 Added:
If the instructions stipulate that when replacing a light bulb or transmission belt, parts that need to be removed with the help of tools are not considered to be detachable parts if they meet the following conditions:
Once opened In front of the cover, an instruction to disconnect the vacuum cleaner from the supply circuit is marked on the cover or on parts visible during disassembly, and;
There is at least one layer of accessible live parts after the cover is removed Basic insulation. 9 Start-up of electric appliances
This chapter in GB4706.11998 is not applicable. Input power and current
10
This chapter in GB4706.1-1998 is applicable except for the following content. 10.1 Add
separate inspection of the input power of the power cleaning head. Note: When measuring the rated input power, no load is added to the lead-out line of the vacuum cleaner. No voltage boosting device was used in these measurements. 11 Fever
GB4706.7-1999
GB4706.1-1998 This chapter is applicable except for the following content. 11.3 Added:
Note: When measuring the input power, make sure that the vacuum cleaner has been reassembled correctly, and measure the input power Pl with the suction port closed. 11.5 added:
The boost device is structurally allowed to work frequently. 11.7 added:
The vacuum cleaner works until a stable state is established. For a vacuum cleaner with an automatic cord reel, unwind 1/3 of the total length of the cord and work for 30 minutes, then completely unwind the cord. 12 Blank Chapter
13 Leakage current and electrical strength at operating temperature. Except for the following content, this chapter in GB4706.1-1998 is applicable. 13.1 added:
Note: The boost device does not work.
14 Empty Chapter
15 Moisture Resistance
This chapter in GB4706.1-1998 is applicable except for the following content. 15.2 instead;
Vacuum cleaners with liquid containers shall be constructed so that liquid spilled due to instability of the vacuum cleaner and overturning of hand-held vacuum cleaners and overfilling will not affect their electrical insulation. Note 1: The vacuum cleaner is placed on a support surface at an angle of 10\ to the horizontal direction, and the liquid storage container contains half of the water level specified in the instruction manual. Use a force of 180N to act on the top of the vacuum cleaner from the most unfavorable horizontal direction. A vacuum cleaner is considered unstable if it tips over. Verification shall be carried out by the following test:
In addition to specially prepared cords, X-connected vacuum cleaners shall be equipped with the lightest and smallest cross-section cords in compliance with Table 11.
For vacuum cleaners with appliance input sockets, the test is carried out with a matching connector inserted in place or without it, whichever is most unfavorable.
Completely fill the storage container with an aqueous solution containing approximately 1% sodium chloride by hand, and within 1 minute it will equal 15% of the container capacity or 0.25L, whichever is larger. Then slowly pour into the container. Once the container of handheld vacuum cleaners and unstable vacuum cleaners is completely filled, close the lid. The vacuum cleaner can be kept in the overturned position for 5 minutes, except for those that can automatically return to the normal use position. The nozzle of a suction cleaner is placed in a trough. The bottom of the tank is flush with the support surface of the vacuum cleaner, and an aqueous solution containing detergent is injected with a water level 5 mm higher than the bottom of the tank. This water level was kept constant throughout the test. The aqueous solution is 20g NaCl and 1mL of 28% sodium dodecyl sulfate solution in 8L water. After the vacuum cleaner container is completely filled, work for another 5 minutes. Note 2: The solution should be stored in a cold environment and used within 7 days after preparation. The molecular formula of sodium lauryl sulfate is: C12H25NaSO4. After each test, the vacuum cleaner shall undergo an electrical strength test according to 16.3. The test voltage of the water-absorbing cleaner is: basic insulation, 1000V
- supplementary insulation, 2750V;
- reinforced insulation, 3750V.
GB 4706.7—1999
Inspection of insulation surfaces that may cause creepage distances and clearances to be reduced below the values ??specified in 29.1 should be free of traces of liquid. 16 Leakage current and electrical strength
This chapter in GB4706.1-1998 is applicable except for the following content. 16.3 Addition:
Current-carrying hoses, except for their electrical connections, are soaked in an aqueous solution of approximately 1% sodium chloride at a temperature of 20°C ± 5°C for 1 hour. While the hose is still immersed in the solution, apply 2000V between each wire and all other wires connected together for 5 minutes. Then apply 3750V voltage between all wires and water for 1 minute. 17 Overload protection of transformers and related circuits This chapter in GB4706.11998 applies.
18 Durability
This chapter in GB4706.1-1998 is not applicable. 9 Abnormal operation
19
This chapter in GB4706.1-1998, except for the following content, is applicable. 19.1 Addition:
The test of 19.7 is only performed on the power cleaning head. Water-absorbing cleaners with valves are subject to additional tests in accordance with 19.101. Vacuum cleaners with booster devices that cannot be electronically controlled to release the boost after operation are subject to additional tests in accordance with 19.102. If applicable, add the tests of 19.103 and 19.104 to central vacuum cleaners. 19.7 Added:
Powered cleaning head with rotating brush and similar devices, conduct 30s stall test. 19.9 Not applicable. || tt | After the test, the electrical safety of the vacuum cleaner should not be damaged, especially the windings and connections should not be loose. 19.101 If the container of a suction cleaner is equipped with a valve or other protective device, the nozzle shall be placed in the sink in accordance with 15.2. However, valves or other protective devices should be tested in an open or inactive state. Note: If the vacuum cleaner is equipped with more than one protective device, they should be inactive in sequence. 19.102 The vacuum cleaner works according to the conditions specified in Chapter 11, but its control device does not work and its booster device does not work. 3. Apply rated voltage to the central vacuum cleaner and open and then close the inlet of the suction hose. 19.103
The winding temperature rise should not exceed the specified value of 19.9. 19.104 Central vacuum cleaners with separate radiator motors operate at rated voltage until the air flow causes the motor to stop. 20 Stability and mechanical hazards
This chapter in GB4706.1-1998 is applicable except for the following content. 20.1 Added:
Note: Powered cleaning heads are not subject to this test. 20.2 Added:
GB 4706.7—1999
Note: The requirements for moving parts do not apply to brushes and similar devices. This requirement does not apply to moving parts, such as shafts that are accessible when changing accessories and shafts that rotate only when brushes and similar devices are in motion. 21 Mechanical Strength
This chapter in GB4706.1-1998 is applicable except for the following content. 21.101 Current-carrying hoses shall be resistant to extrusion.
Check compliance by the following test:
Place the hose between two parallel steel plates. Each steel plate is 100mm long and 50mm wide, with a rounded edge of 1mm radius on the long side.
The axis of the hose is at right angles to the long side of the steel plate. The steel plate is placed approximately 350mm from one end of the hose. The steel plates are squeezed together at a rate of (50±5) mm/min until the pressure reaches 1.5kN. Then release the force and conduct an electrical strength test of 16.3 between the wire and the metal box placed on the outside of the hose. The test voltage is 2500V.
21.102 Current-carrying hoses should be resistant to wear and tear.
Check compliance by the following test:
Fix one end of the hose to the rod of the crank mechanism shown in Figure 101. The crank rotates at a rate of 30r/min. The rotation causes one end of the hose to move horizontally forward and backward, and the movement distance exceeds 300mm. The hose is supported by a rotating smooth roller, and an abrasive cloth belt is attached to the outer edge of the roller and moves at a speed of 0.1m/min. The abrasive of the emery cloth is emery, and the particle size is P100 according to ISO/DIS6344. A weight of 1kg is hung from the other end of the hose as a guide to prevent the hose from rotating at the lowest position. The maximum distance between the weight and the center of the roller is 600mm.
The test is conducted based on 100 crank rotations.
After the test, the basic insulation should not leak. An electrical strength test of 16.3 is carried out between the wire and the metal box outside the hose. The test voltage is 1250V.
21.103 Current-carrying hoses should be resistant to bending.
Check whether it is qualified through the following test.
Secure the end of the hose intended to be connected to the power cleaning head to the pivot arm of the test equipment shown in Figure 102. The distance between the pivot axis and the point where the hose extends into the rigid component is (300 ± 50) mm. The pivot arm can be raised 40°±1° from the horizontal position. Hang a 5kg weight on the other end of the hose, or at a convenient place along the hose. When the pivot arm is in a horizontal position, the weight is supported without stretching the hose. NOTE 11 It is necessary to maintain this mass reset throughout the test. The heavy object is allowed to slide down the slope at a maximum deflection angle of 3°. Use the crank (10 ± 1) r/min to raise and lower the pivot arm. After the test is cranked for 2500 cycles, the fixed end of the hose is rotated 90°, and the test is continued for 2500 cycles. Repeat each trial at the other two 90° positions. Note 2: If the hose does not break after 10,000 tests, the twist test is terminated. After the test, conduct the electrical strength test in accordance with 16.3. 21.104 Current-carrying hoses should be resistant to twisting
Check whether they are qualified by the following test.
The end of one end of the hose is fixed in a horizontal position, and the other end of the hose is allowed to hang freely, and this end rotates periodically. Each cycle rotates 5 times in one direction and 5 times in the opposite direction. The rotation speed is 10r/min. A test of 2000 cycles was carried out.
After the test, the hose shall withstand an electrical strength test in accordance with 16.3. and there should be no damage beyond the meaning of this standard.3 Electrical strength test. and there should be no damage beyond the meaning of this standard.3 Electrical strength test. and there should be no damage beyond the meaning of this standard.25L, whichever is larger, and this solution is slowly poured into the container. Once the container of handheld vacuum cleaners and unstable vacuum cleaners is completely filled, close the lid. The vacuum cleaner can be kept in the overturned position for 5 minutes, except for those that can automatically return to the normal use position. The nozzle of a suction cleaner is placed in a trough. The bottom of the tank is flush with the support surface of the vacuum cleaner, and an aqueous solution containing detergent is injected with a water level 5 mm higher than the bottom of the tank. This water level was kept constant throughout the test. The aqueous solution is 20g NaCl and 1mL of 28% sodium dodecyl sulfate solution in 8L water. After the vacuum cleaner container is completely filled, work for another 5 minutes. Note 2: The solution should be stored in a cold environment and used within 7 days after preparation. The molecular formula of sodium lauryl sulfate is: C12H25NaSO4. After each test, the vacuum cleaner shall undergo an electrical strength test according to 16.3. The test voltage of the water-absorbing cleaner is: basic insulation, 1000V
- supplementary insulation, 2750V;
- reinforced insulation, 3750V.
GB 4706.7—1999
Inspection of insulation surfaces that may cause creepage distances and clearances to be reduced below the values ??specified in 29.1 should be free of traces of liquid. 16 Leakage current and electrical strength
This chapter in GB4706.1-1998 is applicable except for the following content. 16.3 Addition:
Current-carrying hoses, except for their electrical connections, are soaked in an aqueous solution of approximately 1% sodium chloride at a temperature of 20°C ± 5°C for 1 hour. While the hose is still immersed in the solution, apply 2000V between each wire and all other wires connected together for 5 minutes. Then apply 3750V voltage between all wires and water for 1 minute. 17 Overload protection of transformers and related circuits This chapter in GB4706.11998 applies.
18 Durability
This chapter in GB4706.1-1998 is not applicable. 9 Abnormal operation
19
This chapter in GB4706.1-1998, except for the following content, is applicable. 19.1 Addition:
The test of 19.7 is only performed on the power cleaning head. Water-absorbing cleaners with valves are subject to additional tests in accordance with 19.101. Vacuum cleaners with booster devices that cannot be electronically controlled to release the boost after operation are subject to additional tests in accordance with 19.102. If applicable, add the tests of 19.103 and 19.104 to central vacuum cleaners. 19.7 Added:
Powered cleaning head with rotating brush and similar devices, conduct 30s stall test. 19.9 Not applicable. || tt | After the test, the electrical safety of the vacuum cleaner should not be damaged, especially the windings and connections should not be loose. 19.101 If the container of a suction cleaner is equipped with a valve or other protective device, the nozzle shall be placed in the sink in accordance with 15.2. However, valves or other protective devices should be tested in an open or inactive state. Note: If the vacuum cleaner is equipped with more than one protective device, they should be inactive in sequence. 19.102 The vacuum cleaner works according to the conditions specified in Chapter 11, but its control device does not work and its booster device does not work. 3. Apply rated voltage to the central vacuum cleaner and open and then close the inlet of the suction hose. 19.103
The winding temperature rise should not exceed the specified value of 19.9. 19.104 Central vacuum cleaners with separate radiator motors operate at rated voltage until the air flow causes the motor to stop. 20 Stability and mechanical hazards
This chapter in GB4706.1-1998 is applicable except for the following content. 20.1 Added:
Note: Powered cleaning heads are not subject to this test. 20.2 Added:
GB 4706.7—1999
Note: The requirements for moving parts do not apply to brushes and similar devices. This requirement does not apply to moving parts, such as shafts that are accessible when changing accessories and shafts that rotate only when brushes and similar devices are in motion. 21 Mechanical Strength
This chapter in GB4706.1-1998 is applicable except for the following content. 21.101 Current-carrying hoses shall be resistant to extrusion.
Check compliance by the following test:
Place the hose between two parallel steel plates. Each steel plate is 100mm long and 50mm wide, with a rounded edge of 1mm radius on the long side.
The axis of the hose is at right angles to the long side of the steel plate. The steel plate is placed approximately 350mm from one end of the hose. The steel plates are squeezed together at a rate of (50±5) mm/min until the pressure reaches 1.5kN. Then release the force and conduct an electrical strength test of 16.3 between the wire and the metal box placed on the outside of the hose. The test voltage is 2500V.
21.102 Current-carrying hoses should be resistant to wear and tear.
Check compliance by the following test:
Fix one end of the hose to the rod of the crank mechanism shown in Figure 101. The crank rotates at a rate of 30r/min. The rotation causes one end of the hose to move horizontally forward and backward, and the movement distance exceeds 300mm. The hose is supported by a rotating smooth roller, and an abrasive cloth belt is attached to the outer edge of the roller and moves at a speed of 0.1m/min. The abrasive of the emery cloth is emery, and the particle size is P100 according to ISO/DIS6344. A weight of 1kg is hung from the other end of the hose as a guide to prevent the hose from rotating at the lowest position. The maximum distance between the weight and the center of the roller is 600mm.
The test is conducted based on 100 crank rotations.
After the test, the basic insulation should not leak. An electrical strength test of 16.3 is carried out between the wire and the metal box outside the hose. The test voltage is 1250V.
21.103 Current-carrying hoses should be resistant to bending.
Check whether it is qualified through the following tests.
Secure the end of the hose intended to be connected to the power cleaning head to the pivot arm of the test equipment shown in Figure 102. The distance between the pivot axis and the point where the hose extends into the rigid component is (300 ± 50) mm. The pivot arm can be raised 40°±1° from the horizontal position. Hang a 5kg weight on the other end of the hose, or at a convenient place along the hose. When the pivot arm is in a horizontal position, the weight is supported without stretching the hose. NOTE 11 It is necessary to maintain this mass reset throughout the test. The heavy object is allowed to slide down the slope at a maximum deflection angle of 3°. Use the crank (10 ± 1) r/min to raise and lower the pivot arm. After the test is cranked for 2500 cycles, the fixed end of the hose is rotated 90°, and the test is continued for 2500 cycles. Repeat each trial at the other two 90° positions. Note 2: If the hose does not break after 10,000 tests, the twist test is terminated. After the test, conduct the electrical strength test in accordance with 16.3. 21.104 Current-carrying hoses should be resistant to twisting
and qualified through the following tests.
The end of one end of the hose is fixed in a horizontal position, and the other end of the hose is allowed to hang freely, and this end rotates periodically. Each cycle rotates 5 times in one direction and 5 times in the opposite direction. The rotation speed is 10r/min. A test of 2000 cycles was carried out.
After the test, the hose shall withstand an electrical strength test in accordance with 16.3. and there should be no damage beyond the meaning of this standard.25L, whichever is larger, and this solution is slowly poured into the container. Once the container of handheld vacuum cleaners and unstable vacuum cleaners is completely filled, close the lid. The vacuum cleaner can be kept in the overturned position for 5 minutes, except for those that can automatically return to the normal use position. The nozzle of a suction cleaner is placed in a trough. The bottom of the tank is flush with the support surface of the vacuum cleaner, and an aqueous solution containing detergent is injected with a water level 5 mm higher than the bottom of the tank. This water level was kept constant throughout the test. The aqueous solution is 20g NaCl and 1mL of 28% sodium dodecyl sulfate solution in 8L water. After the vacuum cleaner container is completely filled, work for another 5 minutes. Note 2: The solution should be stored in a cold environment and used within 7 days after preparation. The molecular formula of sodium lauryl sulfate is: C12H25NaSO4. After each test, the vacuum cleaner shall undergo an electrical strength test according to 16.3. The test voltage of the water-absorbing cleaner is: basic insulation, 1000V
- supplementary insulation, 2750V;
- reinforced insulation, 3750V.
GB 4706.7—1999
Inspection of insulation surfaces that may cause creepage distances and clearances to be reduced below the values ??specified in 29.1 should be free of traces of liquid. 16 Leakage current and electrical strength
This chapter in GB4706.1-1998 is applicable except for the following content. 16.3 Addition:
Current-carrying hoses, except for their electrical connections, are soaked in an aqueous solution of approximately 1% sodium chloride at a temperature of 20°C ± 5°C for 1 hour. While the hose is still immersed in the solution, apply 2000V between each wire and all other wires connected together for 5 minutes. Then apply 3750V voltage between all wires and water for 1 minute. 17 Overload protection of transformers and related circuits This chapter in GB4706.11998 applies.
18 Durability
This chapter in GB4706.1-1998 is not applicable. 9 Abnormal operation
19
This chapter in GB4706.1-1998, except for the following content, is applicable. 19.1 Addition:
The test of 19.7 is only performed on the power cleaning head. Water-absorbing cleaners with valves are subject to additional tests in accordance with 19.101. Vacuum cleaners with booster devices that cannot be electronically controlled to release the boost after operation are subject to additional tests in accordance with 19.102. If applicable, add the tests of 19.103 and 19.104 to central vacuum cleaners. 19.7 Added:
Powered cleaning head with rotating brush and similar devices, conduct 30s stall test. 19.9 Not applicable. || tt | After the test, the electrical safety of the vacuum cleaner should not be damaged, especially the windings and connections should not be loose. 19.101 If the container of a suction cleaner is equipped with a valve or other protective device, the nozzle shall be placed in the sink in accordance with 15.2. However, valves or other protective devices should be tested in an open or inactive state. Note: If the vacuum cleaner is equipped with more than one protective device, they should be inactive in sequence. 19.102 The vacuum cleaner works according to the conditions specified in Chapter 11, but its control device does not work and its booster device does not work. 3. Apply rated voltage to the central vacuum cleaner and open and then close the inlet of the suction hose. 19.103
The winding temperature rise should not exceed the specified value of 19.9. 19.104 Central vacuum cleaners with separate radiator motors operate at rated voltage until the air flow causes the motor to stop. 20 Stability and mechanical hazards
This chapter in GB4706.1-1998 is applicable except for the following content. 20.1 Added:
Note: Powered cleaning heads are not subject to this test. 20.2 Added:
GB 4706.7—1999
Note: The requirements for moving parts do not apply to brushes and similar devices. This requirement does not apply to moving parts, such as shafts that are accessible when changing accessories and shafts that rotate only when brushes and similar devices are in motion. 21 Mechanical Strength
This chapter in GB4706.1-1998 is applicable except for the following content. 21.101 Current-carrying hoses shall be resistant to extrusion.
Check compliance by the following test:
Place the hose between two parallel steel plates. Each steel plate is 100mm long and 50mm wide, with a rounded edge of 1mm radius on the long side.
The axis of the hose is at right angles to the long side of the steel plate. The steel plate is placed approximately 350mm from one end of the hose. The steel plates are squeezed together at a rate of (50±5) mm/min until the pressure reaches 1.5kN. Then release the force and conduct an electrical strength test of 16.3 between the wire and the metal box placed on the outside of the hose. The test voltage is 2500V.
21.102 Current-carrying hoses should be resistant to wear and tear.
Check compliance by the following test:
Fix one end of the hose to the rod of the crank mechanism shown in Figure 101. The crank rotates at a rate of 30r/min. The rotation causes one end of the hose to move horizontally forward and backward, and the movement distance exceeds 300mm. The hose is supported by a rotating smooth roller, and an abrasive cloth belt is attached to the outer edge of the roller and moves at a speed of 0.1m/min. The abrasive of the emery cloth is emery, and the particle size is P100 according to ISO/DIS6344. A weight of 1kg is hung from the other end of the hose as a guide to prevent the hose from rotating at the lowest position. The maximum distance between the weight and the center of the roller is 600mm.
The test is conducted based on 100 crank rotations.
After the test, the basic insulation should not leak. An electrical strength test of 16.3 is carried out between the wire and the metal box outside the hose. The test voltage is 1250V.
21.103 Current-carrying hoses should be resistant to bending.
Check whether it is qualified through the following test.
Secure the end of the hose intended to be connected to the power cleaning head to the pivot arm of the test equipment shown in Figure 102. The distance between the pivot axis and the point where the hose extends into the rigid component is (300 ± 50) mm. The pivot arm can be raised 40°±1° from the horizontal position. Hang a 5kg weight on the other end of the hose, or at a convenient place along the hose. When the pivot arm is in a horizontal position, the weight is supported without stretching the hose. NOTE 11 It is necessary to maintain this mass reset throughout the test. The heavy object is allowed to slide down the slope at a maximum deflection angle of 3°. Use the crank of (10±1) r/min to raise and lower the pivot arm. After the test is cranked for 2500 cycles, the fixed end of the hose is rotated 90°, and the test is continued for 2500 cycles. Repeat each trial at the other two 90° positions. Note 2: If the hose does not break after 10,000 tests, the twist test is terminated. After the test, conduct the electrical strength test in accordance with 16.3. 21.104 Current-carrying hoses should be resistant to twisting
and qualified through the following tests.
The end of one end of the hose is fixed in a horizontal position, and the other end of the hose is allowed to hang freely, and this end rotates periodically. Each cycle rotates 5 times in one direction and 5 times in the opposite direction. The rotation speed is 10r/min. A test of 2000 cycles was carried out.
After the test, the hose shall withstand an electrical strength test in accordance with 16.3. and there should be no damage beyond the meaning of this standard.3 Addition:
Except for their electrical connections, the current-carrying hoses should be soaked in an aqueous solution of approximately 1% sodium chloride at a temperature of 20°C ± 5°C for 1 hour. While the hose is still immersed in the solution, apply 2000V between each wire and all other wires connected together for 5 minutes. Then apply 3750V voltage between all wires and water for 1 minute. 17 Overload protection of transformers and related circuits This chapter in GB4706.11998 applies.
18 Durability
This chapter in GB4706.1-1998 is not applicable. 9 Abnormal operation
19
This chapter in GB4706.1-1998, except for the following content, is applicable. 19.1 Addition:
The test of 19.7 is only performed on the power cleaning head. Water-absorbing cleaners with valves are subject to additional tests in accordance with 19.101. Vacuum cleaners with booster devices that cannot be electronically controlled to release the boost after operation are subject to additional tests in accordance with 19.102. If applicable, add the tests of 19.103 and 19.104 to central vacuum cleaners. 19.7 Added:
Powered cleaning head with rotating brush and similar devices, conduct 30s stall test. 19.9 Not applicable. || tt | After the test, the electrical safety of the vacuum cleaner should not be damaged, especially the windings and connections should not be loose. 19.101 If the container of a suction cleaner is equipped with a valve or other protective device, the nozzle shall be placed in the sink in accordance with 15.2. However, valves or other protective devices should be tested in an open or inactive state. Note: If the vacuum cleaner is equipped with more than one protective device, they should be inactive in sequence. 19.102 The vacuum cleaner works according to the conditions specified in Chapter 11, but its control device does not work and its booster device does not work. 3. Apply rated voltage to the central vacuum cleaner and open and then close the inlet of the suction hose. 19.103
The winding temperature rise should not exceed the specified value of 19.9. 19.104 Central vacuum cleaners with separate radiator motors operate at rated voltage until the air flow causes the motor to stop. 20 Stability and mechanical hazards
This chapter in GB4706.1-1998 is applicable except for the following content. 20.1 Added:
Note: Powered cleaning heads are not subject to this test. 20.2 Added:
GB 4706.7—1999
Note: The requirements for moving parts do not apply to brushes and similar devices. This requirement does not apply to moving parts, such as shafts that are accessible when changing accessories and shafts that rotate only when brushes and similar devices are in motion. 21 Mechanical Strength
This chapter in GB4706.1-1998 is applicable except for the following content. 21.101 Current-carrying hoses shall be resistant to extrusion.
Check compliance by the following test:
Place the hose between two parallel steel plates. Each steel plate is 100mm long and 50mm wide, with a rounded edge of 1mm radius on the long side.
The axis of the hose is at right angles to the long side of the steel plate. The steel plate is placed approximately 350mm from one end of the hose. The steel plates are squeezed together at a rate of (50±5) mm/min until the pressure reaches 1.5kN. Then release the force and conduct an electrical strength test of 16.3 between the wire and the metal box placed on the outside of the hose. The test voltage is 2500V.
21.102 Current-carrying hoses should be resistant to wear and tear.
Compliance is checked by the following test:
Fix one end of the hose to the rod of the crank mechanism shown in Figure 101. The crank rotates at a rate of 30r/min. The rotation causes one end of the hose to move horizontally forward and backward, and the movement distance exceeds 300mm. The hose is supported by a rotating smooth roller, and an abrasive cloth belt is attached to the outer edge of the roller and moves at a speed of 0.1m/min. The abrasive of the emery cloth is emery, and the particle size is P100 according to ISO/DIS6344. A 1kg weight is hung from the other end of the hose as a guide to prevent the hose from rotating at the lowest position. The maximum distance between the weight and the center of the roller is 600mm.
The test is conducted based on 100 crank rotations.
After the test, the basic insulation should not leak. An electrical strength test of 16.3 is carried out between the wire and the metal box outside the hose. The test voltage is 1250V.
21.103 Current-carrying hoses should be resistant to bending.
Check whether it is qualified through the following tests.
Secure the end of the hose intended to be connected to the power cleaning head to the pivot arm of the test equipment shown in Figure 102. The distance between the pivot axis and the point where the hose extends into the rigid component is (300 ± 50) mm. The pivot arm can be raised 40°±1° from the horizontal position. Hang a 5kg weight on the other end of the hose, or at a convenient place along the hose. When the pivot arm is in a horizontal position, the weight is supported without stretching the hose. NOTE 11 It is necessary to maintain this mass reset throughout the test. The heavy object is allowed to slide down the slope at a maximum deflection angle of 3°. Use the crank (10 ± 1) r/min to raise and lower the pivot arm. After the test is cranked for 2500 cycles, the fixed end of the hose is rotated 90°, and the test is continued for 2500 cycles. Repeat each trial at the other two 90° positions. Note 2: If the hose does not break after 10,000 tests, the twist test is terminated. After the test, conduct the electrical strength test in accordance with 16.3. 21.104 Current-carrying hoses should be resistant to twisting
and qualified through the following tests.
The end of one end of the hose is fixed in a horizontal position, and the other end of the hose is allowed to hang freely, and this end rotates periodically. Each cycle rotates 5 times in one direction and 5 times in the opposite direction. The rotation speed is 10r/min. A test of 2000 cycles was carried out.
After the test, the hose shall withstand an electrical strength test in accordance with 16.3. and there should be no damage beyond the meaning of this standard.3 Addition:
Except for their electrical connections, the current-carrying hoses should be soaked in an aqueous solution of approximately 1% sodium chloride at a temperature of 20°C ± 5°C for 1 hour. While the hose is still immersed in the solution, apply 2000V between each wire and all other wires connected together for 5 minutes. Then apply 3750V voltage between all wires and water for 1 minute. 17 Overload protection of transformers and related circuits This chapter in GB4706.11998 applies.
18 Durability
This chapter in GB4706.1-1998 is not applicable. 9 Abnormal operation
19
This chapter in GB4706.1-1998, except for the following content, is applicable. 19.1 Addition:
The test of 19.7 is only performed on the power cleaning head. Water-absorbing cleaners with valves are subject to additional tests in accordance with 19.101. Vacuum cleaners with booster devices that cannot be electronically controlled to release the boost after operation are subject to additional tests in accordance with 19.102. If applicable, add the tests of 19.103 and 19.104 to central vacuum cleaners. 19.7 Added:
Powered cleaning head with rotating brush and similar devices, conduct 30s stall test. 19.9 Not applicable. || tt | After the test, the electrical safety of the vacuum cleaner should not be damaged, especially the windings and connections should not be loose. 19.101 If the container of a suction cleaner is equipped with a valve or other protective device, the nozzle shall be placed in the sink in accordance with 15.2. However, valves or other protective devices should be tested in an open or inactive state. Note: If the vacuum cleaner is equipped with more than one protective device, they should be inactive in sequence. 19.102 The vacuum cleaner works according to the conditions specified in Chapter 11, but its control device does not work and its booster device does not work. 3. Apply rated voltage to the central vacuum cleaner and open and then close the inlet of the suction hose. 19.103
The winding temperature rise should not exceed the specified value of 19.9. 19.104 Central vacuum cleaners with separate radiator motors operate at rated voltage until the air flow causes the motor to stop. 20 Stability and mechanical hazards
This chapter in GB4706.1-1998 is applicable except for the following content. 20.1 Added:
Note: Powered cleaning heads are not subject to this test. 20.2 Added:
GB 4706.7—1999
Note: The requirements for moving parts do not apply to brushes and similar devices. This requirement does not apply to moving parts, such as shafts that are accessible when changing accessories and shafts that rotate only when brushes and similar devices are in motion. 21 Mechanical Strength
This chapter in GB4706.1-1998 is applicable except for the following content. 21.101 Current-carrying hoses shall be resistant to extrusion.
Check compliance by the following test:
Place the hose between two parallel steel plates. Each steel plate is 100mm long and 50mm wide, with a rounded edge of 1mm radius on the long side.
The axis of the hose is at right angles to the long side of the steel plate. The steel plate is placed approximately 350mm from one end of the hose. The steel plates are squeezed together at a rate of (50±5) mm/min until the pressure reaches 1.5kN. Then release the force and conduct an electrical strength test of 16.3 between the wire and the metal box placed on the outside of the hose. The test voltage is 2500V.
21.102 Current-carrying hoses should be resistant to wear and tear.
Check compliance by the following test:
Fix one end of the hose to the rod of the crank mechanism shown in Figure 101. The crank rotates at a rate of 30r/min. The rotation causes one end of the hose to move horizontally forward and backward, and the movement distance exceeds 300mm. The hose is supported by a rotating smooth roller, and an abrasive cloth belt is attached to the outer edge of the roller and moves at a speed of 0.1m/min. The abrasive of the emery cloth is emery, and the particle size is P100 according to ISO/DIS6344. A weight of 1kg is hung from the other end of the hose as a guide to prevent the hose from rotating at the lowest position. The maximum distance between the weight and the center of the roller is 600mm.
The test is conducted based on 100 crank rotations.
After the test, the basic insulation should not leak. An electrical strength test of 16.3 is carried out between the wire and the metal box outside the hose. The test voltage is 1250V.
21.103 Current-carrying hoses should be resistant to bending.
Check whether it is qualified through the following test.
Secure the end of the hose intended to be connected to the power cleaning head to the pivot arm of the test equipment shown in Figure 102. The distance between the pivot axis and the point where the hose extends into the rigid component is (300 ± 50) mm. The pivot arm can be raised 40°±1° from the horizontal position. Hang a 5kg weight on the other end of the hose, or at a convenient place along the hose. When the pivot arm is in a horizontal position, the weight is supported without stretching the hose. NOTE 11 It is necessary to maintain this mass reset throughout the test. The heavy object is allowed to slide down the slope at a maximum deflection angle of 3°. Use the crank (10 ± 1) r/min to raise and lower the pivot arm. After the test is cranked for 2500 cycles, the fixed end of the hose is rotated 90°, and the test is continued for 2500 cycles. Repeat each trial at the other two 90° positions. Note 2: If the hose does not break after 10,000 tests, the twist test is terminated. After the test, conduct the electrical strength test in accordance with 16.3. 21.104 Current-carrying hoses should be resistant to twisting
and qualified through the following tests.
The end of one end of the hose is fixed in a horizontal position, and the other end of the hose is allowed to hang freely, and this end rotates periodically. Each cycle rotates 5 times in one direction and 5 times in the opposite direction. The rotation speed is 10r/min. A test of 2000 cycles was carried out.
After the test, the hose shall withstand an electrical strength test in accordance with 16.3. and there should be no damage beyond the meaning of this standard.This chapter in 1-1998 shall apply except for the following content. 21.101 Current-carrying hoses shall be resistant to extrusion.
Check compliance by the following test:
Place the hose between two parallel steel plates. Each steel plate is 100mm long and 50mm wide, with a rounded edge of 1mm radius on the long side.
The axis of the hose is at right angles to the long side of the steel plate. The steel plate is placed approximately 350mm from one end of the hose. The steel plates are squeezed together at a rate of (50±5) mm/min until the pressure reaches 1.5kN. Then release the force and conduct an electrical strength test of 16.3 between the wire and the metal box placed on the outside of the hose. The test voltage is 2500V.
21.102 Current-carrying hoses should be resistant to wear and tear.
Compliance is checked by the following test:
Fix one end of the hose to the rod of the crank mechanism shown in Figure 101. The crank rotates at a rate of 30r/min. The rotation causes one end of the hose to move horizontally forward and backward, and the movement distance exceeds 300mm. The hose is supported by a rotating smooth roller, and an abrasive cloth belt is attached to the outer edge of the roller and moves at a speed of 0.1m/min. The abrasive of the emery cloth is emery, and the particle size is P100 according to ISO/DIS6344. A weight of 1kg is hung from the other end of the hose as a guide to prevent the hose from rotating at the lowest position. The maximum distance between the weight and the center of the roller is 600mm.
The test is conducted based on 100 crank rotations.
After the test, the basic insulation should not leak. An electrical strength test of 16.3 is carried out between the wire and the metal box outside the hose. The test voltage is 1250V.
21.103 Current-carrying hoses should be resistant to bending.
Check whether it is qualified through the following test.
Secure the end of the hose intended to be connected to the power cleaning head to the pivot arm of the test equipment shown in Figure 102. The distance between the pivot axis and the point where the hose extends into the rigid component is (300 ± 50) mm. The pivot arm can be raised 40°±1° from the horizontal position. Hang a 5kg weight on the other end of the hose, or at a convenient place along the hose. When the pivot arm is in a horizontal position, the weight is supported without stretching the hose. NOTE 11 It is necessary to maintain this mass reset throughout the test. The heavy object is allowed to slide down the slope at a maximum deflection angle of 3°. Use the crank (10 ± 1) r/min to raise and lower the pivot arm. After the test is cranked for 2500 cycles, the fixed end of the hose is rotated 90°, and the test is continued for 2500 cycles. Repeat each trial at the other two 90° positions. Note 2: If the hose does not break after 10,000 tests, the twist test is terminated. After the test, conduct the electrical strength test in accordance with 16.3. 21.104 Current-carrying hoses should be resistant to twisting
and qualified through the following tests.
The end of one end of the hose is fixed in a horizontal position, and the other end of the hose is allowed to hang freely, and this end rotates periodically. Each cycle rotates 5 times in one direction and 5 times in the opposite direction. The rotation speed is 10r/min. A test of 2000 cycles was carried out.
After the test, the hose shall withstand an electrical strength test in accordance with 16.3. and there should be no damage beyond the meaning of this standard.This chapter in 1-1998 shall apply except for the following content. 21.101 Current-carrying hoses shall be resistant to extrusion.
Check compliance by the following test:
Place the hose between two parallel steel plates. Each steel plate is 100mm long and 50mm wide, with a rounded edge of 1mm radius on the long side.
The axis of the hose is at right angles to the long side of the steel plate. The steel plate is placed approximately 350mm from one end of the hose. The steel plates are squeezed together at a rate of (50±5) mm/min until the pressure reaches 1.5kN. Then release the force and conduct an electrical strength test of 16.3 between the wire and the metal box placed on the outside of the hose. The test voltage is 2500V.
21.102 Current-carrying hoses should be resistant to wear and tear.
Compliance is checked by the following test:
Fix one end of the hose to the rod of the crank mechanism shown in Figure 101. The crank rotates at a rate of 30r/min. The rotation causes one end of the hose to move horizontally forward and backward, and the movement distance exceeds 300mm. The hose is supported by a rotating smooth roller, and an abrasive cloth belt is attached to the outer edge of the roller and moves at a speed of 0.1m/min. The abrasive of the emery cloth is emery, and the particle size is P100 according to ISO/DIS6344. A 1kg weight is hung from the other end of the hose as a guide to prevent the hose from rotating at the lowest position. The maximum distance between the weight and the center of the roller is 600mm.
The test is conducted based on 100 crank rotations.
After the test, the basic insulation should not leak. An electrical strength test of 16.3 is carried out between the wire and the metal box outside the hose. The test voltage is 1250V.
21.103 Current-carrying hoses should be resistant to bending.
Check whether it is qualified through the following test.
Secure the end of the hose intended to be connected to the power cleaning head to the pivot arm of the test equipment shown in Figure 102. The distance between the pivot axis and the point where the hose extends into the rigid component is (300 ± 50) mm. The pivot arm can be raised 40°±1° from the horizontal position. Hang a 5kg weight on the other end of the hose, or at a convenient place along the hose. When the pivot arm is in a horizontal position, the weight is supported without stretching the hose. NOTE 11 It is necessary to maintain this mass reset throughout the test. The heavy object is allowed to slide down the slope at a maximum deflection angle of 3°. Use the crank (10 ± 1) r/min to raise and lower the pivot arm. After the test is cranked for 2500 cycles, the fixed end of the hose is rotated 90°, and the test is continued for 2500 cycles. Repeat each trial at the other two 90° positions. Note 2: If the hose does not break after 10,000 tests, the twist test is terminated. After the test, conduct the electrical strength test in accordance with 16.3. 21.104 Current-carrying hoses should be resistant to twisting
and qualified through the following tests.
The end of one end of the hose is fixed in a horizontal position, and the other end of the hose is allowed to hang freely, and this end rotates periodically. Each cycle rotates 5 times in one direction and 5 times in the opposite direction. The rotation speed is 10r/min. A test of 2000 cycles was carried out.
After the test, the hose shall withstand an electrical strength test in accordance with 16.3. and there should be no damage beyond the meaning of this standard.
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