GB 4706.25-2002 Safety of household and similar electrical appliances - Particular requirements for dishwashers
Some standard content:
GB4706.25—2002
All technical contents of this standard are mandatory. Foreword
This standard is equivalent to IEC60335-2-5:1992 Safety of household and similar electrical appliances - Particular requirements for dishwashers - 4th edition and Supplement No. 1 and No. 2 of 1999. This standard should be used in conjunction with GB 4706.1-1998 General safety requirements for household and similar electrical appliances.
The part of this standard marked with "applicable" indicates that the corresponding provisions in GB 4706.1 are applicable to this standard. The part of this standard marked with "replacement" or "modification" shall be based on this standard; the part of this standard marked with "addition" indicates that in addition to complying with the corresponding provisions of GB4706.1, it shall also comply with the provisions added by this standard. This standard replaces GB4706.25-1991 from the date of implementation. This standard is proposed by the China Light Industry Federation. This standard is under the jurisdiction of 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 Ma Junxi, Lu Jianguo, and Xu Li. This standard is entrusted to the National Technical Committee for Standardization of Household Electrical Appliances for interpretation. GB 4706.25—2002
IEC Preface
1) IEC (International Electrotechnical Commission) is a world-wide standardization organization composed of all national electrotechnical committees (IEC National Committees). The purpose of IEC is to promote comprehensive cooperation among countries in the field of electrical and electronic standardization. In view of the above purposes and considering the needs of other activities, IEC also publishes international standards. The entire formulation work is completed by the committee. Any IEC National Committee that is particularly interested in this technical issue can participate in the standard formulation work. According to IEC and ISO, and they have a close working relationship.
2) IEC resolutions or agreements on technical issues are developed by technical committees in which all particularly interested national committees participate and try to express the international consensus on the issues involved. 3) These resolutions or agreements are used internationally in the form of standards, technical reports and rules, and are recognized by national committees in this sense.
4) In order to promote international unification, IEC hopes that national committees will adopt the contents of IEC standards as their national standards within the scope permitted by national conditions. Differences between IEC and corresponding national or regional standards should be clearly indicated in national standards as much as possible. This standard was developed by Technical Committee 61 "Safety of Household and Similar Electrical Appliances". This standard replaces the third edition of IEC 60335-2-5 and its supplements 1, 2 and 3. This standard is based on the following documents: International Standard Discussion
61(CO)699
61(CO)699A
Voting Report
61(CO)747
61(CO)748
Further information on the voting process of this standard can be found in the voting reports in the table above. This standard is to be used in conjunction with the latest version of IEC 60335-1 General requirements for safety of household and similar electrical appliances and its supplements. This standard is based on the third edition of IEC 60335-1 (1991). In order to transform into the IEC standard "Particular requirements for dishwashers", this content supplements and modifies the corresponding clauses of IEC 6D335-1.
If a special clause in the "General Requirements" is not mentioned in this standard, the clause in the "General Requirements" can be used reasonably. If "addition", "modification" or "replacement" is indicated in this standard, the corresponding content in the "General Requirements" shall be modified accordingly. In this standard:
1) The following printing fonts are used:
-Main text: printing font.
-Test specifications: italics.
-Notes: lowercase printing font.
The boldface words in the main text are defined in Chapter 2. When the definition of "General Requirements" involves adjectives, the adjectives and the nouns to which they belong are also boldfaced.
2) The subclauses added to the "General Requirements" should be numbered starting from 101. The appendices to the added "General Requirements" are indicated by letters AA, BB, etc. There are the following differences in some countries:
GB4706.25—2002
-6.1: If the rated voltage does not exceed 150V, the appliance can be a Class 01 appliance (Japan).-20.102: The endurance cycle of the door system chain is 30,000 times (USA). 25.7: The length of the power cord is at least 1.5m (USA). Appendix AA, detergent and source detergent are different (USA). Appendix BB: The test is different (USA).
1 Scope
National Standard of the People's Republic of China
Safety of household and similar electrical appliances-Particular requirements for disbwashers
Safety of household and similar electrical appliances-Particular requirements for disbwashers This chapter in GB 4706.1—1998 is replaced by the following: GB 4706. 25—2002
idt IEC 60335-2-5: 1992
Replaces GB 4706. 25—1991
This standard deals with the safety of household and similar electrical dishwashers intended for washing and rinsing dishes, cutlery and other utensils, with a rated voltage not exceeding 250 V for single-phase appliances and 480 V for other appliances. NOTE 1 Phosphorus scrubbers may incorporate water heating and drying equipment. As far as practicable, this standard deals with the common hazards presented by appliances which are encountered by people in the wild and at home. This standard does not normally consider: Appliances used by children or infirm persons who are not supervised; Appliances intended for children to play with. NOTE 2 Attention should be drawn to the fact that: Appliances used in vehicles, ships or aircraft must have additional requirements; Appliances used in tropical areas must have special requirements; In many countries additional requirements are laid down by the national health authorities, those responsible for labour protection, water authorities and similar authorities. NOTE 3 This standard does not apply to: Phosphorus scrubbers for commercial purposes (IEC 60335-2-58) - Appliances for industrial purposes; Appliances used in special atmospheres, such as those in which corrosive or explosive atmospheres (dust, steam or gas) are present. 2 Definitions
This clause in GB4706.1-1998 is applicable except for the following. 2.2.9 This clause is replaced by the following:
Normal operation: The appliance is operated at the maximum water volume for which it is designed, without detergent and rinse aid and without tableware or serving utensils. However, if the load significantly affects the test results, the appliance shall be loaded with the maximum number of tableware and serving utensils specified by the manufacturer: Note! The tableware and serving utensils used are specified in GB436. Use water at any suitable pressure within the range specified in the instructions, with the water inlet temperature as follows: -60℃±5℃ or if a higher temperature is specified in the instructions, it is intended to be used for hot water only. -15℃±5℃ is intended to be used for cold water only. If the appliance is intended to have both cold and hot water in the water inlet, use the most unfavorable water temperature. 3 General requirements
The contents of this clause in GB4706.1-1998 are applicable. Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on June 13, 2002 and implemented on June 1, 2003
4 General inducement for testing
GB4706.25--2002
This clause in GB4706.1-1998 is applicable except for the following contents. 4.3 This clause is supplemented with the following contents:
The tests specified in 15.101 are carried out before the tests specified in 15.3. 5 Blank
6 Classification
This clause in GB 4706.1-1998 is applicable except for the following contents. 6.1 This clause is replaced with the following contents:
Appliances shall be of Class I, Class I or Class I in terms of protection against electric shock. Compliance is checked by inspection and relevant tests. 6.2 This article adds the following content:
Appliances designed to be placed on drain boards should be at least IPX1.7 Marking and instructions
This chapter in GB4706.1-1998 is applicable except for the following content. 7.1 This article adds the following content:
Appliances without automatic water level controllers should also be marked with the maximum allowable water level. 7.10 This article adds the following content:
If only one word is used to indicate "closed position", this word should be expressed as "closed" in the official language of the country where the appliance is sold. 7.12 The following content is added to this clause:
The instruction manual shall state the maximum number of sets of tableware designed for the appliance. 7.12.1 The following content is added to this clause:
The instruction manual shall state:
-The maximum permissible water inlet pressure of the appliance connected to the mains water supply, expressed in Pa; -If the appliance needs to operate correctly, there must be a minimum permissible water inlet pressure; -For dishwashers with vents at the bottom, the ground spikes must not block the vents. The following clause is added to this chapter:
7.101 For solenoid valve housings and similar components that are directly connected to the mains water supply and combined in external hoses, if the working voltage exceeds the extra-low voltage, they should be marked with the symbol No.5036 in IEC 60417. Compliance is checked by visual inspection.
B Protection against touching live parts
The contents of this chapter in GB 4706.1-1998 are all applicable. 9 Starting of electric appliances
The contents of this chapter in GB4706.1-1998 are not applicable. 10 Input power and current
This chapter in GB4706.1-1998 is applicable except for the following contents. 10.1 The following contents are added to this clause:
GB 4706-25-2002
Note: When the input power reaches the maximum period, select it as the representative period. 10.2 The following contents are added to this clause:
Note: When the current reaches the maximum period, select it as the representative period. 11 Heating
This chapter in GB 4706.1-1998 is applicable except for the following contents. 11.7 This clause is replaced by the following:
Appliances with a program controller or timer shall be operated for two cycles according to the program that causes the maximum temperature rise. There is a 15-minute interval between the two cycles, during which the door or lid is opened. Other appliances shall be operated for two cycles or two 15-minute operation periods according to the program that causes the maximum temperature rise as specified in the instruction manual, whichever is longer. There is a 15-minute interval between the two cycles or operation periods, during which the door or lid is opened. Then, a drainage pump driven by a separate motor shall be operated for three cycles, with a 15-minute stop between each cycle. The duration of each cycle shall be 1.5 times the time required to empty the appliance of the maximum amount of water designed. The drainage water level is: - For appliances placed on the floor, 90 cm from the ground. For other appliances, the maximum height from the supporting surface given in the instruction manual. 12 Empty Chapter
13 Leakage current and electrical strength at working temperature This chapter in GB 4706.1-1998 is applicable except for the following content. 13.2 The following changes are made to this clause:
Replace the leakage current value specified for fixed type 1 appliances with the following content: The leakage current of fixed type 1 appliances shall not exceed 3.5 mA or 1 mA per kilowatt of rated input power, whichever is greater, but the maximum permissible value is 5 mA.
14 Blank Chapter
15 Road Chaotong
This chapter in GB 4706.1-1998 is applicable except for the following content. 15.1 The following content is added to this clause:
Solenoid valves and similar components connected to the water supply and integrated in external hoses are subject to the tests specified for IPX7 appliances. 15.2 This clause is replaced with the following content:
The structure of the appliance should ensure that in normal use, even if the water inlet fails to close, the overflowing liquid will not affect its electrical insulation.
Compliance is checked by the following test:
X-connected appliances, except those using specially prepared flexible cords, are fitted with the lightest permissible cord of the smallest cross-section specified in Table 11.
For appliances filled by the user, fill with a solution of approximately 1% sodium chloride (NaCl) in water and then add a further amount of this solution equal to 15% of the rated capacity of the appliance or 0.25 l, whichever is the greater, steadily over a period of 1 min. For other appliances which operate only at the maximum water level, add 5 g of a detergent as specified in Annex AA per litre of water to the water at the maximum water level of the appliance. Keep the inlet valve open and continue filling for 15 min after overflowing has begun or until the inlet is automatically stopped by other means.
For appliances loaded from the front, if the door is opened manually and there is no damage to the door interlocking system, open the door after the above procedure.
GB4706-25—2002
For appliances with a working surface, 0.2 L of water containing about 1% sodium chloride (NaCl) is poured evenly and evenly on the middle part of the working surface from a height of about 5 cm for 15B. After the above test, the appliance shall be immediately subjected to the electrical strength test of 16.3 and visual inspection shall show that there is no water on the insulation that can cause the electrical distance and electrical clearance to decrease below the values specified in 29.1. The following clause is added to this chapter:
15.101 The construction of the appliance shall be such that foam does not affect its electrical insulation. After the test of 15.2, the following test shall be carried out immediately to check whether it is qualified. The appliance is operated for one complete cycle under the conditions specified in Chapter 11 for the longest time of the procedure. The detergent shall be an aqueous solution containing 20 g of sodium chloride (NaCl) and 1 mL of 28% sodium dodecyl sulfate per 8 L of water. For appliances with automatic detergent dispensers, the solution is added manually at a certain point in the cycle when the solution is normally dispensed automatically. For other appliances, the solution is added before starting the cycle. The appliance shall be subjected to the electrical strength test specified in 16.3. The appliance shall then be operated for two cycles under the same conditions without adding the above aqueous solution. The appliance shall be subjected to the electrical strength test specified in 16.3.
The appliance shall be placed in a test room at normal atmospheric pressure for 24 h before being subjected to the test specified in 15.3. Notes
1 The solution used in this test must be stored in a cool place and used within seven days of preparation. 2 The chemical formula of sodium dodecyl sulfate is CuHzNa,SO. 16 Required current and electrical strength
The contents of this chapter in GB4706.1-1998 are applicable. 17 Overload protection of transformers and related circuits The contents of this chapter in GB 4706.1-1998 are applicable. 18 Durability The contents of this chapter in GB 4706.1-1998 are not applicable. 19 Abnormal operation The contents of this chapter in GB 4706.1-1998 are applicable except for the following contents. 19.1 The following contents are added to this clause: For appliances with program controllers or timers, the tests specified in 19.101 are used instead of the tests specified in 19.2 and 19.3. 19.2 The following contents are added to this clause: No water is added to the appliance or water just covers the heating element to obtain limited heat energy loss, whichever is more unfavorable. 19.4 The following static changes are made to the contents of this clause: The appliance is tested at 1.06 times the rated voltage instead of 1.15 times the rated input power. 19.9 Not applicable.
The following clauses are added to this chapter:
19.101 The appliance is operated under normal load and rated voltage. Compliance is checked by any operation or any fault that may be expected in normal use.
During the test, the appliance shall not emit flames or molten gold chips, and the temperature of its windings shall not exceed the values shown in Table 6.
1 The following are examples of failure states:
The programmer stops at any position #
GB 4706. 25--2002
-When operating any part of the program, one or more phases of the power supply are disconnected and reconnected, and a component is open or short-circuited!
--Solenoid valve failure;
-When operating any part of the program, the door or cover is opened and closed, if possible. 2 A contactor used to switch heating elements on and off with its main contacts set in the "open" position during normal use is considered a fault condition unless the appliance is provided with at least two sets of interconnected contacts. This can be accomplished by providing two contactors which operate independently of each other or by providing a contactor which has two independent armatures operating two independent main contacts.
3 In general, the tests are limited to those fault conditions which are likely to give the most adverse results. Simulations of component failures are limited to those faults which expose the user to danger. If operation without water in the appliance is considered to be the more severe condition for starting any sequence, the sequence is tested with the tap closed but with the tap opened after the sequence has been started.
5 If the appliance stops operating at any particular point in the sequence, the test of the fault condition is considered to have terminated. 6 The thermal control is not short-circuited.
7 The fault condition of the automatic filling volume remaining open is covered by the test specified in 15.2. 8 The fault conditions of short circuit or open circuit of the motor are covered by the test specified in 19.7. 20 Stability and mechanical hazards
This chapter in GB4706-1-1998 is applicable except for the following contents. 20.1 This clause is replaced by the following:
Except for fixed appliances, appliances shall have adequate stability. Compliance is checked by the following test. Appliances with appliance input sockets shall be equipped with a suitable connector and flexible cord. In normal operation, the appliance is emptied of water or filled with water as specified, whichever is the more unfavorable. Doors and lids are closed and any castors are turned to the most unfavorable position.
The appliance is placed on an inclined plane at an angle of 10° to the horizontal in any normal use position. The supply cord is placed on the inclined surface in the most unfavorable position. When the appliance is placed on a horizontal surface and tilted at an angle of 10°, if the part of the appliance that was not in contact with the support surface now touches the horizontal surface, the appliance shall be placed on a horizontal support and tilted at an angle of 10° in the most unfavorable direction. The appliance shall not tip over.
1 The appliance is not connected to the power supply.
2 Appliances with castors shall be tested on a horizontal surface. 3 Lock the castors to prevent the appliance rollers from rolling. The appliances added above are also checked for compliance by the tests specified in 20.101. The following clause is added to this chapter:
20.101 The appliance does not contain water, set of cutlery, tableware, etc. Place it on a horizontal surface and apply or hang a weight of 23 kg to the center of the open door or any fully opened negative drawer, whichever is more unfavorable. The castors are turned to the most unfavorable position. Appliances normally used on the table or similar appliances with a horizontal chain, the door is in a horizontal position at rest, and a weight of 7 kg is used instead of 23 kg.
Appliances normally used on the table or similar appliances with drawers are placed in the most unfavorable position, and the maximum number of set of cutlery is placed in accordance with the instructions for use, and an additional test is carried out. The appliance should not be tilted accidentally.
20.102 Doors and covers shall be interlocked so that the appliance can only be operated when the door or cover is closed, unless appropriate protection is provided against the spray of hot water when the door or cover is open.
GB 4706.25—2002
Compliance shall be checked by inspection and manual test. Note: Slight spray of hot water after the door or cover is opened can be ignored. 21 Mechanical strength
The contents of this chapter in GB 4706.1—1998 are applicable. 22 Structure
The contents of this chapter in GB 4706.1—1998 are applicable except for the following contents. 22.6 The contents of this clause are modified as follows:
The colored water shall be replaced by distilled water with 0.6 mL of rinse agent added per liter. The composition of the rinse agent shall be as specified in Appendix AA. This clause adds the following content:
Note: The components of the aging test specified in Appendix BB are not considered to be components that can leak. The following clause is added to this chapter:
22.101 The appliance shall be resistant to water pressure under normal use. The appliance connected to the water supply shall be able to withstand a static pressure equal to twice the maximum allowable water inlet pressure or 1.2 MPa, whichever is greater, for 5 min. Check whether it is qualified. There shall be no leakage in any part including the water inlet pipe. 22.102 The appliance shall be constructed so that the heating element cannot contact the flammable material inside, causing deformation of the heating element or the support of the heating element.
Compliance shall be determined by current inspection.
22.103 The appliance shall be constructed so that during the drying period, the contact of dishes and knives with the heating element will not cause a risk of fire. Check whether it is qualified by the following test.
Place the appliance on a white pine board covered with thin paper and place a vinyl plate with a diameter of 80 mm and a thickness of 2 mm in the most unfavorable position directly on the electric heating element. Then the appliance is operated for a drying cycle at 1.1 times the rated voltage and under normal operation. After one-third of the drying cycle, when smoke or odor occurs, whichever is the shorter, open the door or cover. During the test, no flame, burning chips or fire should ignite other parts of the appliance. Except for the ignition of the plate, any other flame should be extinguished within 30 seconds. And it should not ignite thin paper or burnt wood. Xiang
1 Thin paper is specified in 6-86 of [S0 4046:1978. It is a thin, soft, light and strong packaging paper usually used to package delicate works of art, with a mass between 12g/m2 and 30g/m2.
2 The plate material used in this test is non-flame retardant material and natural color release vinyl without additives, with a relative density of 0.96±0.005.23 Internal wiring
This clause in GB4706.1-1998 is applicable except for the following contents. 23.3 The following changes are made to this clause:
The test with the power disconnected is substituted for the test with the appliance in operation. The number of wire bending tests is increased to 30000.
The following clause is added to this clause:
23.101 The internal wiring of the solenoid valve power supply and similar components connected to the water supply in combination with an external hose shall be insulated in such a way that the insulation and sheath are at least equivalent to the light polyvinyl chloride flexible wire (standard name 227IEC52) of armor. Compliance is checked by inspection.
Note: The machine model characteristics specified in IEC 60227 are not checked. 24 Components
GB 4706.25—2002
The contents of this chapter in GB 4706.1—1998 are applicable. 25
Power supply connection and external soft
The contents of this chapter in GB 4706.1--1998 are applicable. 26 Wiring accessories for external conductors
The contents of this chapter in GB 4706.1—1998 are applicable. 27 Grounding measures
The contents of this chapter in GB 4706.1—1998 are applicable. 28 Screws and connections
The contents of this chapter in GB 4706.1—1998 are applicable. 29 Electrical distances, electrical insulation and through-insulation distances The contents of this chapter in GB 4706.1—1998 are applicable. 30 Resistance to heat, flame and tracking
This clause in GB4706.1-1998 is applicable except for the following. 30.2 This clause is added with the following:
For appliances with a program controller or timer, 30.2.3 is applicable. For other appliances, 30.2.2 is applicable. 30.3 This clause is added with the following:
Note: Switchgear with moving contacts and intended only for abnormal operation, other than those operated manually, should be considered to be subjected to severe working conditions. Switchgear with moving contacts, intended only for abnormal operation and other parts made of rubber materials should also be considered to be subjected to extremely severe working conditions - unless they are sensitive and enclosed or where contamination by additives is unlikely to occur, in which case they are considered to be subjected to the working condition of the product. 31 Anti-rust
This clause in GB 4706.1-1998 is applicable. 2 Radiation, toxicity and similar hazards
The contents of this chapter in GB4706.1-1998 are applicable. GB 4706.25-2002
The appendix in GB4706.1-1998 is applicable except for the following contents. Appendix A
(Standard Appendix)
Referenced normative standards
This appendix adds the following contents:
IEC60436:1981 Methods for measuring the performance of electric disc selectors. I501817.1985 Rubber vulcanization - Determination of the effect of liquids ISO 4046:1978
Paper, punching, pulp and related items
Together,
Annex AA
(Standard Annex)
Detergents and rinse aids
Note, extracted from IEC 60436.
AA1 Detergent
The detergent consists of the following ingredients:
Sodium penta-tripolyphosphate (penta-sodiumtriphosphate) Sodium metasilicate KO (anhydraus) Sodium sulfate (anhydrous) (soudium sulphate) (anhydrous) ... Sodium dichloroisocyanate-dihydrate CDB56C ....Plurafac RA43
Mass%
Plurafac RA43 is mixed thoroughly with silicic acid and sulfuric acid. Sodium dioxyisocyanate-dihydrate is mixed with phosphate. The two components are then mixed together.
1 The detergent should be stored in a waterproof container, no more than 1 kg per container, in a cool place.The validity period is three months. 2 According to the specific conditions in my country, other special detergents can be used as substitutes. AA2 Source detergent
According to the actual conditions of the country where the test is conducted, choose one of the following two formulas as a rinse agent: Neutral rinse agent
Plurafac RA40
Plurafac RA30
Isopropyl alcohol (isoprapanol)
Deionized water
Acidic rinse agent
PlurafacRA40
Plurafac RA30
Citrate (anhydrous) (citric acid) (anhydrous) Isopropyl alcohol (isopropanol) -.-wwW.bzxz.Net
Deionized water.
Note: The above-mentioned detergents can be replaced by source detergents with similar ingredients according to actual conditions. Mass%
Mass%
.25.00
. 12.0
GB4706.25—2002
Appendix BB
(Standard Appendix)
Aging test of synthetic rubber parts
Aging test shall be conducted on synthetic rubber parts by measuring their hardness and mass before and after being immersed in a high-temperature detergent and rinse agent solution.
At least three samples of each type of parts shall be tested. The samples and test procedures shall be modified in accordance with the provisions of ISO 1817. The following clauses in ISO 1817-1985 shall be considered.
3 Test liquids
Two test liquids shall be used:
One liquid is a solution of 6 g of the detergent specified in Appendix AA dissolved in each liter of distilled water. The other liquid is a solution of 0.6 mL of the rinse agent specified in Appendix AA dissolved in each liter of distilled water. Note: The test is carefully carried out to ensure that the total mass of the test sample immersed in each liter of liquid does not exceed 100 B, and the test sample is completely immersed so that the entire sample surface is freely exposed to the liquid. During the test, the test sample is not directly exposed to sunlight. Test pieces of different compounds cannot be mixed and immersed in the same solution at the same time.
5 State of the test piece
Temperature is 23℃2℃, relative humidity is 50%±5%. 6 Immersion temperature
The solution immersed in the test piece is heated within 1 hour to a temperature of 75+℃ and maintained at this value. The solution is renewed every 24 hours and heated in the same way.
Note: To avoid excessive evaporation of the solvent, it is recommended to use a sealed circulation system or a similar method of refreshing the solution. Drip time
The total immersion time of the test piece is 48 hours.
Then, immediately immerse the test piece in fresh solution maintained at ambient temperature. After the immersion time of the test piece is 45 min ± 15 min, the test piece is taken out of the solution, rinsed in cold water at 15°C ± 5°C, and then dried with ink-blotting paper. B Determination of changes in volume, mass and dimensions
B.1 General requirements
The gravimetric method is applicable.
8.2 Volumetric and gravimetric method
8.2.4 Expression of results
The increased mass of the test piece shall not exceed 10% of the value measured before immersion. 10 Determination of changes in physical properties after immersion The microhardness test specified in 10.2 is applicable. 10.2.5 Expression of results
The change in hardness of the test piece shall not exceed 8IRHD. Its surface shall not become sticky and there shall be no obvious magnetic cracks or any other damage visible to the naked eye.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.