GB 4706.26-2000 Safety of household and similar electrical appliances - Particular requirements for centrifugal dehydrators
Some standard content:
GB 4706.26—2000
This standard is equivalent to IEC60335-2-4, 1993 "Safety of household and similar electrical appliances - Part 2 - Particular requirements for centrifugal dehydrators" and the first and second amendments (1997-1999). It is the first revision of GB4706.26-1991 "Safety of household and similar electrical appliances - Particular requirements for centrifugal dehydrators". 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 marked with "applicable" indicate that the corresponding provisions in GB4706.1-1998 are applicable to this standard. The parts of this standard marked with "replace" or "modify" shall be subject to this standard. The parts of this standard marked with "added" indicate that in addition to complying with the corresponding provisions in GB4706.1-1998, the provisions added by this standard shall also be complied with. The main differences between this standard and IEC60335-2-4 are: - Added in 6.1: The appliance should be Class 0. This standard mainly revised GB4706.26-1991 in the following aspects: 6.2 clearly stipulates that the appliance should be at least IPX4; - 7.12.1 adds "Before opening the cover, connect the centrifugal dehydrator to the power supply, do not force the cover open. ” and mark it on the appliance or on the wall close to the appliance: Chapter 9 is not applicable. Chapter 18 Durability is not applicable. That is, the test of running at 1.1 times the rated voltage and 0.9 times the rated voltage for 48 hours each is cancelled. This standard will replace GB 4706.26-1991 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Household Electrical Appliances. The main drafting unit of this standard is China Household Electrical Appliances Research Institute. The main drafters of this standard are Wang Huirong, Li Xianli, and Xu Li. This standard is entrusted to the National Technical Committee for Standardization of Household Electrical Appliances for interpretation. GB 4706. 26-2000
IEC Preface
1) IEC (International Electrotechnical Commission) is a worldwide standardization organization consisting of all national electrotechnical committees (IEC National Committees). Its purpose is to promote international cooperation on all standardization issues in the electrical and electronic fields. There are some other additional activities after this, such as issuing IEC International Standards. The preparation of international standards is entrusted to technical committees. In this preparation process, any IEC National Committee can participate in the issues of interest. International, governmental and non-governmental organizations also participate in this preparation. IEC and the International Organization for Standardization (ISD) work closely together under the conditions determined by the agreement between the two organizations.
2) IEC's formal resolutions or agreements on technical issues are formulated by technical committees participated by all national committees interested in these issues, and therefore, they all represent and explain an international consensus on the issues involved as faithfully as possible. 3) IEC publishes standards, technical reports or guidelines for international use in a recommended manner and are accepted by national committees 4) In order to promote international coordination, IEC hopes that national committees should adopt IEC in their national standards or regional standards when conditions permit. Standard. Any differences between this standard and any national or regional standard corresponding to the IEC standard shall be clearly indicated in the latter. 5) IEC has not established a procedure for the approval mark. IEC assumes no responsibility for the direct claim that a device complies with an IEC standard. This standard was prepared by [EC Technical Committee No. 61 (Safety of Household and Similar Electrical Appliances). IEC60335-2-4 Fourth Edition replaces the 1984 Third Edition and the 1987 Amendment. This standard is based on the following documents:
61(C0)764
Voting Report
61(CO)778
All materials related to the adoption of this standard can be found in the voting report shown in the table above. This standard is used in conjunction with the updated versions of IEC 60335-1 and its amendments. This standard is based on IEC 60335-1 Part 3 This standard supplements and modifies the corresponding clauses of IEC60335-1, thus becoming the IEC standard, Particular requirements for centrifugal dehydrators. Clauses of IEC60335-1 not mentioned in this standard may be used as long as they are reasonable. Where "addition", "modification" or "replacement" is marked in this standard, the relevant clauses in this standard shall be modified accordingly. Notes 1. The following fonts are used to indicate: 2. Requirement: Printed. 3. Test procedure: Italic, 4. Notes: Lowercase print, 5. The fonts in the clauses are the definitions given in Chapter 2 of the Sieve. 2. The clauses added on the basis of IEC 60335-1 start from 101. The following differences exist in some countries:
—2.2.9: The test may be carried out with another specified test material, the area of each piece of clothing being between 4 800 cm and 5 000 cm, with one side not less than 55 cm (USA). - Chapter 3: Restricted access to dc components in the neutral conductor of the appliance (Australia). - 6.2: IPX0 appliances are permitted (USA). 15.2: Different tests are carried out (USA). 18.101: 6 000 cycles are required (Canada and USA). CB 4706.26—2000
—19.7: This applies (USA).
———20.101: Test not carried out (USA). -20.103: Different requirements (USA). -22.104: Different requirements (USA). -22.106: Different requirements (USA). - 21.101, 21.102: The tests for metal covers and thermoplastic covers are different depending on the construction requirements of the appliance (USA). 1 Scope
National Standard of the People's Republic of China
Safety of household and similar electrical appliances
Particular requirements for spln extractors
Safety of household and similar electrical appliancesParticular requirements for spln extractorsGB4706.1—1998This chapter is replaced by the following:GB 4706.26—2000
qvLEC60335-2-4:1993
Replaces GB 4706.26—1991
This standard applies to the safety of centrifugal extractors for household and similar purposes, with a load capacity of not more than 10 kg of dry clothes, a tumbler linear speed not exceeding 50 m/s, and a rated voltage not exceeding 250 V for single-phase appliances and 480 V for other appliances. Note 1: Centrifugal extractors installed on washing machines are within the scope of this standard regardless of their capacity. Appliances not intended for ordinary household use are included within the scope of this standard provided they may present a danger to the public, such as appliances used by infirm persons in shops or in light industry and agriculture. NOTE 2 For example, a centrifugal extractor for public use in residential areas or laundry rooms. As far as practicable, this standard deals with the common hazards presented by appliances which people encounter in and around the home. This standard does not normally take into account: - use of appliances by children or unsupervised infirm persons - use of appliances by children.
3 Attention should be drawn to the following facts: - appliances used in vehicles, ships or aircraft may have additional requirements; - appliances used in tropical areas may have special requirements: - in many countries additional requirements are laid down by the national health authorities, those responsible for national labour protection, the national water authorities and similar authorities. 4 This standard does not apply to: - appliances specially designed for industrial purposes - appliances used in special environments, such as those in which corrosive or explosive atmospheres (dust, steam or gas) are present. 2 Definitions
This chapter in GB 4706.1—1998 is applicable except for the following. 2.2.9 Warning:
Normal operation: The appliance drum is loaded with laundry of the maximum dry weight specified in the instruction manual and operated. The laundry is pre-washed, double-layered hemmed cotton cloth of approximately 70 cm × 70 cm in size and between 140 g/m and 175 g/m in dry state. After being soaked with cold water, it is evenly distributed in the drum. 2.7.2 Addition:
Note: When referring to the cover, the door should be included. Approved by the State Administration of Quality and Technical Supervision on March 16, 2000 and implemented on March 1, 2001
3 General requirements
This chapter in GB 4706.1—1998 is applicable. 4 General conditions for testing
GB 4706.26—2000
This chapter in GB 4706.1-1998 is applicable except for the following contents. 4.2 Addition:
Before the test in Chapter 20, the test in 22.101 shall be carried out. 4.101 Centrifugal dehydrators shall be tested as portable appliances unless they are fixed appliances or combined in another appliance. 5 Blank chapter
6 Classification
This chapter in GB 4706.1-1998 is applicable except for the following contents. 6.1 Replacement:
Appliances shall be of Class 0, Class I, Class I or Class I in terms of protection against electric shock. Compliance is checked by inspection and relevant tests. 6.2 Addition:
Appliances shall be at least IPX4.
7 Marking and instructions
This chapter in GB 4706.1-1998 is applicable except for the following. Addition:
If the "off position" is indicated by only one word, the word shall be indicated by the word "off" in the appropriate language of the country where the appliance is sold. 7.12 Addition:
The instructions for use shall specify the maximum dry mass of clothes designed for the appliance, in kg. 7.12. 1 Added:
Appliances intended for public use in public buildings and equipped with an energized interlock system for releasing the cover shall be marked with the following: Before the cover is opened, the centrifugal dehydrator is connected to the power supply. Do not forcefully open the cover.
Unless marked on the appliance, the instructions shall indicate that there is a "Caution" sign permanently fixed to the wall against which the appliance is attached. Appliances intended for public use in apartment buildings and equipped with an energized interlock system for releasing the cover shall be marked in the installation instructions that a timer or similar device that automatically shuts off the appliance shall not be installed in the power supply circuit. 8 Protection against contact with live parts
This chapter in GB 4706.1-199B is applicable 9 Starting of electric appliances
This chapter in GB 4706.1-1998 is not applicable. 10 Input power and current
This chapter in GB 4706.1-1998 is applicable -11 Heating
GB 4706. 26—2000
This chapter in GB4706.1—1998 is applicable except as follows. 11.7 Replacement:
The appliance shall be operated for five spin cycles with a rest period after each cycle. Each rest period, including braking time, shall be 1 min or 4 min per kilogram of dry clothes, whichever is longer. The clothes shall be re-soaked in cold water during the rest period. For appliances with a program controller or timer, the spin cycle is the maximum time allowed by the controller. For other appliances, the duration of each spin cycle is as follows: 15 min for appliances with continuous water injection source washing
5 min for other appliances;
If a longer cycle is specified in the instruction manual, the longer cycle shall be used. 12 Blank chapter
|13 Leakage current and electrical strength at working temperature This clause of GB4706.1-1998 is applicable. 14 Blank
15 Moisture resistance
This clause of GB4706.1-1998 is applicable except as follows. 15.2 Replacement:
The construction of the appliance shall be such that spillage of liquid in normal use will not affect its electrical insulation. Compliance is checked by the following test:
For X-connected appliances, except for specially prepared conductors, all other appliances shall be equipped with the lightest permitted flexible cord of the smallest cross-section specified in Table 11.
Block the inlet of the drain pump or the gravity drain inlet. Fill the drum with the clothes specified for normal operation and add cold water of twice the mass of dry clothes. Then, the remaining water after the soaking process is injected into the appliance, and then the appliance is operated at rated voltage for 1 min or the longest time allowed by the program controller or timer, whichever is shorter. For appliances with working surfaces, a total of 0.5 L of a solution containing approximately 1% sodium nitride (NaCl) solution and 0.6% acidic rinse agent as specified in Appendix AA of GR4706.25 is poured from the top of the appliance where the controller is placed. The control knob is then operated within its operating range and this operation is repeated after an interval of 5 min.
The appliance should then be subjected to the electrical strength test of 16.3 and visually inspected. It should be shown that there is no water on the insulation that could cause the creepage distance and electrical clearance to be reduced to below the values specified in 29.1.
16 Leakage current and electrical strength
This chapter in GB4706.1-1998 is applicable. 17 Overload protection of transformers and related circuits This chapter in GB4706.1-1998 is applicable. 18 Durability
Appliances having a cover which can be opened while the drum is rotating shall be constructed with brake mechanisms and cover interlocks which shall withstand the stresses in normal use.
Compliance shall be checked by the following test: GB 4706.26—2000
Under normal operation the appliance is operated at 1,06 times the rated voltage until the motor reaches maximum speed. The cover is then fully opened. To ensure that the appliance has not reached an excessive temperature, the test is repeated after a sufficient period of rest of the drum.
The test shall be:
Separate centrifugal extractor 3500 cycles
A centrifugal extractor fitted on a washing machine and having a separate rotating device 1000 cycles. At least every 250 cycles, re-soak the laundry with cold water. After the test the appliance shall comply with the requirements for further use and there shall be no reduction in compliance with this standard. Note: Forced cooling may be used to prevent excessive temperatures and shorten the test time. 19 Non-normal belt operation
This clause of GB4706.1-1998 is applicable except for the following inner wear. 19.7 is not applicable.
19.9 is not applicable.
20 Stability and mechanical hazards
This clause of GB4706.1-1998 is applicable except for the following. 20.1 Addition:
Under normal operation, the drum is empty or filled with water-soaked clothing, whichever is the more unfavorable. 20.1D1 Unbalanced load shall not have a harmful effect on the appliance. Compliance is determined by the following test:
The appliance is placed on a horizontal support surface and a weight of 0.2 kg or a weight of 10% of the maximum clothing mass specified in the instructions for use, whichever is the heavier, is fixed to the middle of the inner wall of the drum. The appliance is operated at rated voltage for 5 min or for the longest time allowed by the programmer or timer, whichever is the shorter. The test is carried out four times, after each test the weight being moved 90° around the inner periphery of the drum. During the test the appliance shall not overturn and the drum shall not strike other parts outside the enclosure. NOTE: The exception is the safety switch for preventing the drum from being inserted.
After the test the appliance shall continue to be usable.
20.102 The lid shall be provided with an interlocking device which allows the appliance to be operated only when the lid is in the closed position. Compliance is checked by inspection and by manual test. NOTE An interlocking device which can be released by the test finger of Figure 1 is not a compliance. 20.103 For centrifugal extractors, either stand-alone or for centrifugal extractors with separate extractor drums mounted on washing machines, it shall not be possible to open the lid when the drum is rotating if the kinetic energy exceeds 1 500 J or the maximum linear speed exceeds 20 m/s. Compliance is checked by inspection, measurement and the following test: The appliance is operated at rated voltage and without load. When the cover is interlocked in the test of 22.101, an attempt is made to apply a force to open the cover to determine the opening force.
When the drum is rotating, it should be impossible to open the cover. Notes
1 If the drum is not cylindrical, the linear velocity should be the average linear velocity. 2 Calculate the kinetic energy according to the following formula: bzxz.net
Where: E——kinetic energy, kg
GB 4706.26-2000
The mass of clothes specified in the instruction manual, kg V——maximum linear velocity of the drum, m/s. 20.104 Whether it is a separate centrifugal dehydrator or a centrifugal dehydrator with a separate dehydration drum installed in a washing machine, the kinetic energy of the drum does not exceed 1500J or the maximum linear velocity does not exceed 20m/s. When the motor is energized or when the drum speed exceeds 601/min, it should not touch the moving parts.
The braking system should not be affected by water penetration. Compliance is checked by repeating the flooding test of 15.2. The appliance is operated at rated voltage and without load, with the cover gradually opened 4 mm to 10 mm at a time. The test pin of Figure 101 shall not touch any rotating part at a speed exceeding 60 r/min.When the opening exceeds 10 mm, but not more than 12 mm, a test rod with a diameter of 3 mm and a length of 120 mm shall not be able to touch rotating parts with a speed exceeding 601/min. In addition, the test finger of Figure 1 is applicable and shall not be able to touch rotating parts within a distance of 20 mm. When the opening exceeds 12 mm, the motor shall be powered off and the drum speed shall not exceed 60 r/min. Note: The front-opening door type dehydrator is 12 mm and the front-opening door type dehydrator is 75 mm. 20.105 Appliances using a washing drum for dehydration, the kinetic energy of the liquid drum exceeds 1500 J and the linear speed exceeds: - 20 m/sl for washing machines with liquid drums rotating on a horizontal axis - 40 m/s for washing machines with drums rotating on a vertical axis; when the drum rotates, the linear speed exceeds 60 r/min and it is impossible to open the machine. 20.106 For appliances using a washing drum for dehydration, the kinetic energy of the drum shall not exceed 1500 J or the linear speed shall not exceed: - 20 m/s for a washing machine with a drum rotating on a horizontal axis - 40 m/s for a washing machine with a drum rotating on a vertical axis When the lid is opened, an automatic device on the appliance reduces the speed of the drum to 60 t/min. Compliance is checked by the following test:
The appliance is operated at rated voltage and without load. In normal use, an attempt is made to open the lid with a force not exceeding 50 N. If the lid is opened, the drum speed shall drop to less than 60 r/min within 7 g after the lid is opened 50 mm. 20.107 Protective devices mounted on the top of centrifugal dehydrators with vertical axes shall be so located or protected that laundry which may be thrown out of the dehydration drum in normal use will not damage the devices. Compliance is checked by inspection.
21 Mechanical strength
This clause of GB 4706.11998 is applicable except as follows. 21.101 Covers of appliances loaded from the top shall have adequate mechanical strength. Compliance is checked by the following test
A rubber hemisphere with a diameter of 70 mm and a hardness between 40 IRHD and 50 IRHD is fixed to a cylindrical object with a mass of 20 kg and dropped from a height of 10 cm towards the centre of the cover. The test is carried out three times. After the test, the cover shall not be damaged to the extent that moving parts can be touched. 21.102 The cover and its hinges shall have adequate resistance to deformation. Compliance is checked by the following test: In the most unfavourable direction and position, the cover is opened with a force of 50 N. After the test, the hinges shall not be loose and the appliance shall not be damaged or deformed to the extent that it does not comply with the requirements of 20.102 to 20.106.
22 Structure
GB 4706.26—2000
This clause in GB4706.1-1998 applies except as follows. 22.101 The cover interlock shall be so constructed that it may not be possible to open the cover by force in normal use. Compliance is checked by the following test: In normal use, the cover is opened manually and the force applied is measured. The cover is closed and interlocked. An attempt is then made to open the cover in the same manner. It shall not be possible to open the cover with a force less than 10 times the initial measured value. A minimum force of 50 N is required to open the cover. Note: If the interlock is not required to comply with clause 20, no test is required. 23 Internal wiring
This clause in GB 4706.1—1998 applies except as follows. 24 Components
This clause in GB4706.1—1998 applies except as follows. 24.1.2 The number of working cycles of the timer is increased to 10,000 times. 25 Power supply connection and external flexible cord
This chapter in GB4706.1-1998 is applicable. 26 Terminals for external conductors
This chapter in GB4706.1-1998 is applicable. 27 Grounding measures
This chapter in GB4706.1-1998 is applicable. 28 Screws and connections
This chapter in GB 4706.1-1998 is applicable. 29 Creepage distance, electrical space and through insulation distances
This chapter in GB4706.1-1998 is applicable. 30 Heat resistance, flame resistance and electric tracking resistance
This chapter in GB4706.1-1998 is applicable except for the following contents, 30.2 is added
30.2.3 is not applicable.
31 Rust prevention
This chapter in GB 4706.1—1998 is applicable. 32 Radiation, toxicity and similar hazards
This chapter in GB4706.1—1998 is applicable. 20 Dry 9
GB 47D6. 26—2000
Aging materials
Figure 101 Long test pin
Dimension unit: mm
GB4706.26—2000
This appendix in GB4706.1—1998 is applicable except for the following contents. Appendix C
(Standard Appendix)
Motor aging test
Addition:
Force is 2000.1—1998 This chapter in GB4706.1—1998 is applicable. 32 Radiation, toxicity and similar hazards
This chapter in GB4706.1—1998 is applicable. 20 Dry 9
GB 47D6. 26—2000
Aging materials
Figure 101 Long test pin
Dimension unit: mm
GB4706.26—2000
This appendix in GB4706.1—1998 is applicable except for the following contents. Appendix C
(Standard Appendix)
Motor aging test
Addition:
Force is 2000.1—1998 This chapter in GB4706.1—1998 is applicable. 32 Radiation, toxicity and similar hazards
This chapter in GB4706.1—1998 is applicable. 20 Dry 9
GB 47D6. 26—2000
Aging materials
Figure 101 Long test pin
Dimension unit: mm
GB4706.26—2000
This appendix in GB4706.1—1998 is applicable except for the following contents. Appendix C
(Standard Appendix)
Motor aging test
Addition:
Force is 2000.
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