GB 4706.39-1997 Safety of household and similar electrical appliances - Special requirements for commercial electric ovens and toasters
Some standard content:
GB4706.39-1997
Foreword
This standard is equivalent to IEC335-2-48 "Safety of Household and Similar Electrical Appliances Part 2: Special Requirements for Commercial Electric Ovens and Toasters" (1988) (first edition), (first revision in 1990). This standard should be used in conjunction with GB4706.1-92 "General safety requirements for household and similar electrical appliances".
The safety standards for household and similar electrical appliances consist of two parts. The first part is the general requirements, and the second part is the special safety requirements for the product.
The part of this standard that says "applicable" means that the corresponding provisions in GB4706.1-92 are applicable to this standard; the part of this standard that says "replace" or "modify" should be based on this standard. The provisions in the standard shall prevail; the part marked "added" in this standard means that in addition to complying with the corresponding provisions of GB4706.1-92, it must also comply with the added provisions in this standard. This standard is proposed by the Industrial Department of the Ministry of Domestic Trade of the People's Republic of China. This standard is under the jurisdiction of the Commercial Electrical Food Processing and Service Equipment Subcommittee of the National Technical Committee for Standardization of Household Electrical Appliances. This standard was drafted by: National Catering Service Machinery Quality Supervision and Inspection Center. The main drafters of this standard: Gu Xiru, Xia Xiaoli, Wang Shujing, Mao Suhua GB4706.39—1997
IEC Foreword
1) IEC related technical committees formulated by all national committees with special concerns about this A formal resolution or agreement on a technical matter that represents as nearly as possible an expression of international consensus on the issues involved. 2) These resolutions or agreements are in the form of recommendations for international use and are accepted by all national committees in this sense. 3) In order to promote international uniformity, IEC hopes that all national committees should adopt IEC to the extent that their domestic circumstances permit. The contents of the standards serve as regulations for their countries. Any inconsistencies between the standards recommended by IEC and the corresponding national standards should be clearly stated in the national standards as much as possible.
IEC Preface
This publication was developed by Subcommittee 61E "Safety of Commercial Electrical Food Processing and Service Equipment" of IEC Technical Committee 61 "Safety of Household and Similar Electrical Appliances". It constitutes the first edition of the IEC335-2-48 publication. The text of this publication is based on the following document: June Law
61E(CO)28
Further information can be found in the vote report shown in the table above. Voting Report
61E(CO)34
This second part is to be used in conjunction with the IEC335-1 publication. It is based on the second edition (1976) and the second printing (1983), including revisions No. 1 (1977), No. 2 (1979) and No. 3 (1982), and in the revisions 4 (1984), 5 (1986) and 6 (1988). This should be taken into account in future new versions of IEC335-1 publications or their modifications. This Part 2 supplements or modifies the corresponding provisions in the IEC335-1 publication in order to convert this publication into the IEC standard: Safety Requirements for Commercial Electric Ovens and Toasters (First Edition). If an individual provision in Part One is not mentioned in Part Two, such provision shall still apply as long as it is reasonable. When this first edition is marked as "added", "modified" or "replaced", the relevant requirements, test specifications or instructions in Part One should be modified accordingly. In this publication, the note "Some States" regarding the practice of different countries is contained in Articles 11.8, 13.2, 16.2, 19.4, 19.11, 22.2, 22.101 and 25.4.
In publications:
1) Use the following typography fonts:
Requirement itself: roman;
test specification: italic;
Instructions: Small Roman font.
2) The added clauses or diagrams to the first part should be numbered starting from 101; the added appendices are marked with letters AA, BB, etc. The following IEC publications are cited within this standard:
Publication No. 529 (1976): Classification of the degree of protection provided by enclosures. 1 Scope
National Standard of the People's Republic of China
Safety of household and similar electrical appliances
Special requirements for commercial electric ovens and toasters Safety of household and similar electrical appliancesParticular requirements for For commercial electric grillers and toasters, except for the following content, this chapter in GB4706.1-92 is applicable. 1.1 This article is replaced by the following:
This standard applies to commercial electrical appliances not for general household use: - ovens, including rotary or continuous types; toasters, including rotary or continuous types; Similar appliances for baking food with radiant heat, such as electric rotisserie ovens, baking sheets, etc. The electrical parts of appliances that utilize other forms of energy are also within the scope of this standard. This standard does not apply to:
Industrial ovens and toasters;
- Ovens and toasters used for continuous operation for mass production of food; - Ovens and toasters that are in direct contact with food during baking Single-sided electric heating pan; GB4706.39-1997
ideIEC335-2-48:1988
Appliances used in places with special conditions such as corrosive or explosive gases (dust, steam or gas) . For appliances used outdoors, additional requirements may apply. Additional requirements may be required for appliances used on vehicles, vessels or aircraft. Special requirements may apply for appliances used in tropical countries. Additional requirements set by the health, water supply and labor protection authorities of many countries should be taken into account. 2 Definition
Except for the following content, this chapter in GB4706.1-92 applies. 2.2.4 The following content is added to this article:
The rated input power is the sum of the rated input powers of all individual components in the appliance that can work simultaneously; among several such combinations that may exist, use the maximum input power combination to determine the rated input power. 2.2.19 The following content is added to this article:
\Class I" used in this standard should be understood as Class I structural components. 2.2.20 The following content is added to this article:
" used in this standard "Class" should be understood as Class I structural components. 2.2.29 This article is replaced by the following:
Full heat release conditions refer to the following conditions, and the appliance works under these conditions: State Administration of Technical Supervision 1997- Approved on 11-25 and implemented on 12-01-1998
GB4706.39-1997
, the appliance is operated without load, and all controllers for user operation are adjusted to the highest setting value to ensure normal baking operation. The motors used are all switched on. If equipped with timers, all should be disconnected or short-circuited so that they are inoperative. Doors, lids, reflectors and drip trays should be installed according to the manufacturer's instructions, if not specified. , the door should be fully opened, the drip pan should be placed in the lowest position, and the grill should be placed as high as possible. If the appliance cannot work without load, refer to the manufacturer's instructions for this paragraph and replace it with the following: | |tt||Normal load refers to the load when the appliance is operated under sufficient heat dissipation conditions and the motor installed in the appliance is operated in the required manner under the worst conditions that may occur in normal use according to the manufacturer's instructions. The following terms are added to this chapter:
2.2.101 An oven refers to an appliance that mainly relies on exposing food to radiant heat for baking. 2 A toaster oven refers to an oven that is specially used to bake bread or similar products. An appliance designed for browning with radiant heat. 2.2.102
2.2.103
A rotary or continuous oven is an appliance in which the product being baked can move while it is being baked. 2.2.104
Rotating or continuous baking oven refers to an appliance that can move the baked product during baking. 3 General requirements
This chapter in GB4706.1-92 is applicable. Applicable. 4 General instructions in testing
Except for the following content, this chapter in GB4706.1-92 is applicable. This chapter adds the following clauses:
4.101 For combination appliances, if If the voltage required when the input power of the heating part is increased to 1.15 times the rated input power is more than 3V when the motor voltage is increased to 1.06 times the rated voltage, the motor should be assembled with a separate power supply 4.102 or combined with other appliances. Appliances equipped with other appliances should be tested in accordance with the requirements of this standard. Other appliances should be operated simultaneously in accordance with the requirements of the relevant standards.
4.103. For appliances that use energy sources other than electricity, when testing the electrical components, the influence of the non-electrical components of the appliance must be considered. 5 Ratings
This chapter in GB4706.1-92 is applicable. 6 Classification
Except for the following content, this chapter in GB4706.1-92 is applicable. 6.1 This article adds the following content:
Adds the following content to item (2):
- Spray-proof appliances (IPX5, in accordance with IEC Publication 529). This article adds the following content:
(3) Classification according to the degree of protection against temperature rise due to installation conditions: appliances installed in isolation;
—appliances installed in units of other appliances. There are currently no additional requirements for appliances installed in sets of other appliances. 7 Mark
Except for the following content, this chapter in GB4706.1-92 is applicable. 7.1 The following content is added to this article:
GB4706.39—1997
For a pair of appliances connected to the water source, the water pressure or pressure range is expressed in kPa, unless otherwise specified in the instructions. 7.6 This article adds the following content:
Add the following symbols to the symbol table
IPX5.
kPa.
7.12 This article adds the following content: || tt | Operating procedures and user maintenance instructions, such as cleaning, should also be provided.
For appliances permanently connected to fixed wiring, the instructions should provide information on measures to be taken to protect against leakage currents during installation. If the appliance is not of spray-proof construction, clear and detailed instructions should be provided to the user together with the appliance. The instructions should indicate that this appliance must not be cleaned with a water spray hose.
The following clauses are added to this chapter:
7.101 When conducting the test in Chapter 11, if the temperature rise of the side wall and rear wall of the test corner above the top plane of the appliance exceeds 65K, and/or when conducting the test in Chapter 19 During the test, if the temperature rise of the upper and lower side walls of the appliance exceeds 125K, the installation instructions provided by the manufacturer shall include the following content. This content shall also be included on the temporary label attached to the appliance, such as a strapping type "such as appliance When placed close to walls, partitions, kitchen equipment, decorative coatings, etc., it is recommended that these equipment and facilities should be made of non-flammable materials. If not, they should be covered with appropriate non-flammable insulation materials and be fireproof. Pay close attention to the regulations. "8 Protection against electric shock
This chapter in GB4706.1--92 is applicable
9 Starting of electric appliances
This chapter in GB4706.1--92. Chapters are applicable. 10 Input power and current
Except for the following content, this chapter in GB4706.1-92 is applicable. 10.1 This article adds the following content:
The total input power of multiple units can be determined by measuring the input power of each unit separately. The rated input power is the sum of the rated input powers of all individual components in the appliance that can be operated simultaneously; when there may be several such combinations, the combination with the largest input power is used to determine the rated input power. 11 Fever
Except for the following content, this chapter in GB4706.1-92 applies. 11.2 The following content is added to this article:
-Appliances fixed to the floor shall be installed in accordance with the manufacturer's instructions. If no instructions are provided, the contents of GB4706.1-92 shall apply.
11.4 This article is replaced by the following:
The appliance operates under sufficient heat dissipation conditions so that the total input power of the appliance is 1.15 times the rated input power. If it is not possible to switch on all heating elements at the same time, each combination shall be tested under the conditions permitted by the switching configuration. During the test, the circuit shall be connected to the highest possible load for each switching configuration.
If the appliance has a control device that limits the total input power, the test is carried out with the heating element or combination thereof selected by the control device to impose the most severe conditions.
11.7 This article is replaced by the following:
Let the appliance work until it reaches a stable state. 11.8 The following content is added to this article:
GB 4706.39—1997
For the back wall and side wall of the test corner, including the part protruding in front of the appliance, the 65K temperature rise limit only applies to baking Below the top plane. If the temperature rise limit is exceeded above the top plane of the moxibustion grill, the requirements of Article 7.101 shall apply. This article adds the following content:
In Sweden, the above "added" content does not apply. 11.10 This article is modified with the following content: Replace Note ① of Table 4 with the following content:
The factor "P\ is equal to 8000.
2 Appliances with electric heating elements work under overload conditions 12| |tt||This chapter in GB4706.1-92 is applicable. 3 Electrical insulation and leakage current at operating temperature 13
Except for the following content, this chapter in GB4706.1-92 is applicable. . 13.2 This article is modified with the following content: replace the specified value of leakage current of fixed category 丨 appliances with the following content: ·Appliances connected with cords and plugs
·Other appliances
This article Add the following content:
*.**.*1mA/kW maximum limit 10mA
1mA/kW no maximum limit
When the appliance is equipped with Class I or Class I. When structural components are used, the leakage current of these components shall not exceed the values ??given in GB4706.1-92. This article adds the following content:
Some countries have specified lower limits for leakage current 14 Radio and television interference Inhibition
This chapter in GB4706.1--92 shall apply. 15 Waterproof
Except for the following content, this chapter in GB4706.1--92 shall apply. Contents:
Ordinary and drip-proof appliances installed on the floor need to be splashed with the device shown in Figure 10 in GB4706.1-92
Spray-proof appliances need to be tested. Withstand the test described in IEC Publication No. 529 (IPX5) 15.4 This article is modified with the following content: replace the specified time with the following content:
The time the appliance is placed in the humid chamber (box) is 24h. . Add the following content to this article:
If it is impossible to put the entire appliance into a humid chamber (box), parts with electrical components should be tested separately, and pay attention to the conditions inside the appliance
The following clause is added to this chapter:
15.101 Appliances equipped with switches for filling or cleaning shall be designed so that water flowing from the switch cannot contact live parts. Compliance is determined by the following test: Www.bzxZ.net
Appliances Connected to a water source with the maximum water supply pressure indicated by the manufacturer, tiltable and movable parts, including the cover, are tilted or placed in the most unfavorable position of the water switch. The outlet pipe is placed in such a position that the water flows to those parts that will produce the most adverse results. All devices for controlling water inflow are opened for 1 minute. After this treatment, the appliance should be subjected to Chapter 16 Insulation Strength Test 16 immediately. Strength
Except for the following content, this chapter in GB4706.192 is applicable. 16.2 This article is modified with the following content: replace the specified value of leakage current of fixed Class 1 appliances with the following content: ·Soft Cord- and plug-connected appliances
·Other appliances
This article adds the following content
Some countries provide lower limits for leakage current. 17 Overload protection
This chapter in GB4706.1-92 is applicable. 18 Durability
Except for the following content, this chapter in GB4706.1-92 is applicable. 18.1 This article adds the following content:
The test is only performed on the electric components of the appliance. 18.2 This article is revised with the following content: Replace the paragraph of test instructions in the table with the following content: The electric components of the appliance operate under normal load and 0.9 times the rated voltage for 48 hours. 19 Abnormal operation
Except for the following content, this chapter in GB4706.1--92 applies. 19.1 This paragraph is amended with the following content: The applicable test is replaced by the following content: For all appliances, if necessary, tests are carried out in accordance with 19.2 and 19.3. In addition:
...2mA/kW maximum limit is 10mA;
2mA/kW has no maximum limit.
·Appliances equipped with a controller that limits the temperature during the test in Chapter 11 shall be tested in accordance with 19.4. ·For appliances equipped with electric motors, if applicable, carry out tests in accordance with 19.6 and 19.7 to 19.10. 19.2 This article is revised with the following content: Replace the first paragraph with the following content:
When the appliance operates under the conditions specified in Chapter 11, the power supply voltage determined before the test should make the input power equal to that under sufficient heat dissipation conditions. , 0.85 times the rated input power when reaching steady state, this voltage should be maintained throughout the test. The door or lid is open or closed, depending on which imposes the more severe conditions.
Removable reflectors, drip trays and similar removable parts can be placed in any position or removed, depending on which imposes the more severe conditions. Appliances without doors or lids are not tested. 19.4 This clause is replaced by the following:
The appliance is tested under the conditions specified in Chapter 11, but the voltage shall be such that the input power is 1.24 times the rated input power, and any temperature used to limit the temperature during the test in Chapter 11 shall be Controller short circuit. If the appliance is equipped with more than one control unit, these controls shall be short-circuited in sequence. If the relevant IEC standards cover conditions occurring within the appliance, contactors complying with these standards shall not open or short circuit. However, locking the main contacts of a GB4706.39-1997
contactor in normal use for turning on and off electric heating elements in the "on" position shall be considered a fault condition unless The appliance is equipped with at least two sets of contacts connected in series. For example, there are two contactors that work independently of each other, or a contactor with two independent armatures operating two independent sets of main contacts. 19.11 The following content is added to this article:
If the temperature rise of the side walls above and below the top plane of the appliance exceeds 125K, the precautions given in Article 7.101 shall be included in the installation instructions.
This article adds the following content:
In Sweden, the above "added" content does not apply. 20 Stability and mechanical hazards
Except for the following content, this chapter in GB4706.1-92 is applicable. 20.1 This article adds the following content:
Houses, covers and accessories are placed in the most unfavorable position. Appliances capable of being mounted on a bracket provided by the manufacturer shall be tested in accordance with the manufacturer's instructions together with the bracket used. 21 Mechanical strength
This chapter in GB4706.1-92 is applicable. 22 Structure
Except for the following content, this chapter in GB4706.1-92 is applicable. 22.1 This clause is replaced by the following:
Appliances shall be of class\.
Conformity is determined by inspection and relevant tests. 22.2 The following content is added to this article:
In Sweden, ordinary utensils are not allowed. The following clause is added to this chapter:
22.101 Appliances shall be protected so that moisture and grease do not accumulate to an extent that affects the values ??of creepage distances and clearances. Compliance is determined by inspection.
22.102 The thermal circuit breaker shall be of the non-automatic reset free trip type. Compliance is determined by inspection and manual test. 3 Internal wiring
23
This chapter in GB4706.1-92 is applicable. 24 components
Except for the following content, this chapter in GB4706.1--92 is applicable. 24.11 This clause is replaced by the following:
The thermal circuit breaker shall ensure that all electrodes are disconnected from the power supply, and compliance shall be determined by inspection.
The following clauses are added to this chapter:
1) For appliances that should use three-phase five-wire power plugs, if there is no applicable plug or socket in my country, the appliance is allowed to be Category 01. GB4706.39—1997
24.101 The connector installed on the appliance shall not be equipped with a thermostat. Determine compliance by inspection
5 Power supply connection and external flexible cables and cords
25
Except for the following content, this chapter in GB4706.1-92 is applicable . 25.1 This article adds the following:
Terminal blocks for permanent connection of fixed wiring may also be suitable for X connections of power supply cords. In this case, the instructions should provide detailed data on the power cord.
Use inspection to determine compliance
25.2 This article adds the following content:
Fixed installation appliances and appliances weighing more than 40kg and not equipped with rollers or casters shall be Allow the appliance to be installed in accordance with the manufacturer's instructions before connecting the power cord. 25.3 The following content is added to this article:
Spray-proof appliances shall not be equipped with appliance input sockets. 25.4 This article adds the following content:
Appliances delivered without cords should be connected with X. This article adds the following content:
Some countries are only allowed to use X connection.
25.6 This article is amended with the following content: Replace the specified power cord type with the following content: The power cord shall be an oil-resistant flexible sheathed cable, not lighter than ordinary neoprene or other equivalent synthetic Rubber sheathed cord (Code 245 in IEC57).
6 terminal blocks for external conductors
26
This chapter in GB4706.1-92 is applicable. 27 Grounding Measures
Except for the following content, this chapter in GB4706.1-92 is applicable. 27.2 The following content is added to this article:
Fixed appliances shall be equipped with a terminal block for connection to external equipotential conductors. The terminal block shall maintain an effective electrical connection with all fixed exposed metal parts of the appliance and shall be able to be connected to conductors with a nominal cross-sectional area of ??less than 10 mm. Terminals shall be placed at a location convenient for connection to the reinforced earth conductor after the appliance is installed. Small fixed exposed metal parts, such as nameplates, etc., do not need to form an electrical connection with this terminal. 8 Screws and wiring
28
This chapter in GB4706.192 is applicable.
29 This chapter in GB4706.1-92 applies to creepage distances, electrical clearances and penetration insulation distances. 30 Heat resistance, flame resistance and tracking resistance
Except for the following content, this chapter in GB4706.1--92 is applicable: 30.3 This article is modified with the following content:1--92 of this chapter are applicable. 24.11 This clause is replaced by the following:
The thermal circuit breaker shall ensure that all electrodes are disconnected from the power supply, and compliance shall be determined by inspection.
The following clauses are added to this chapter:
1) For appliances that should use three-phase five-wire power plugs, if there is no applicable plug or socket in my country, the appliance is allowed to be Category 01. GB4706.39—1997
24.101 The connector installed on the appliance shall not be equipped with a thermostat. Determine compliance by inspection
5 Power supply connection and external flexible cables and cords
25
Except for the following content, this chapter in GB4706.1-92 is applicable . 25.1 This article adds the following:
Terminal blocks for permanent connection of fixed wiring may also be suitable for X connections of power supply cords. In this case, the instructions should provide detailed data on the power cord.
Use inspection to determine compliance
25.2 This article adds the following content:
Fixed installation appliances and appliances weighing more than 40kg and not equipped with rollers or casters shall be Allow the appliance to be installed in accordance with the manufacturer's instructions before connecting the power cord. 25.3 The following content is added to this article:
Spray-proof appliances shall not be equipped with appliance input sockets. 25.4 This article adds the following content:
Appliances delivered without cords should be connected with X. This article adds the following content:
Some countries are only allowed to use X connection.
25.6 This article is amended with the following content: Replace the specified power cord type with the following content: The power cord shall be an oil-resistant flexible sheathed cable, not lighter than ordinary neoprene or other equivalent synthetic Rubber sheathed cord (Code 245 in IEC57).
6 terminal blocks for external conductors
26
This chapter in GB4706.1-92 is applicable. 27 Grounding measures
Except for the following content, this chapter in GB4706.1-92 is applicable. 27.2 The following content is added to this article:
Fixed appliances shall be equipped with a terminal block for connection to external equipotential conductors. The terminal block shall maintain an effective electrical connection with all fixed exposed metal parts of the appliance and shall be able to be connected to conductors with a nominal cross-sectional area of ??less than 10 mm. Terminals shall be placed at a location convenient for connection to the reinforced earth conductor after the appliance is installed. Small fixed exposed metal parts, such as nameplates, etc., do not need to form an electrical connection with this terminal. 8 Screws and wiring
28
This chapter in GB4706.192 is applicable.
29 This chapter in GB4706.1-92 applies to creepage distances, electrical clearances and penetration insulation distances. 30 Heat resistance, flame resistance and tracking resistance
Except for the following content, this chapter in GB4706.1--92 is applicable: 30.3 This article is modified with the following content:1--92 of this chapter are applicable. 24.11 This clause is replaced by the following:
The thermal circuit breaker shall ensure that all electrodes are disconnected from the power supply, and compliance shall be determined by inspection.
The following clauses are added to this chapter:
1) For appliances that should use three-phase five-wire power plugs, if there is no applicable plug or socket in my country, the appliance is allowed to be Category 01. GB4706.39—1997
24.101 The connector installed on the appliance shall not be equipped with a thermostat. Determine compliance by inspection
5 Power supply connection and external flexible cables and cords
25
Except for the following content, this chapter in GB4706.1-92 is applicable . 25.1 This article adds the following:
Terminal blocks for permanent connection of fixed wiring may also be suitable for X connections of power supply cords. In this case, the instructions should provide detailed data on the power cord.
Use inspection to determine compliance
25.2 This article adds the following content:
Fixed installation appliances and appliances weighing more than 40kg and not equipped with rollers or casters shall be Allow the appliance to be installed in accordance with the manufacturer's instructions before connecting the power cord. 25.3 The following content is added to this article:
Spray-proof appliances shall not be equipped with appliance input sockets. 25.4 This article adds the following content:
Appliances delivered without cords should be connected with X. This article adds the following content:
Some countries are only allowed to use X connection.
25.6 This article is amended with the following content: Replace the specified power cord type with the following content: The power cord shall be an oil-resistant flexible sheathed cable, not lighter than ordinary neoprene or other equivalent synthetic Rubber sheathed cord (Code 245 in IEC57).
6 terminal blocks for external conductors
26
This chapter in GB4706.1-92 is applicable. 27 Grounding Measures
Except for the following content, this chapter in GB4706.1-92 is applicable. 27.2 The following content is added to this article:
Fixed appliances shall be equipped with a terminal block for connection to external equipotential conductors. The terminal block shall maintain an effective electrical connection with all fixed exposed metal parts of the appliance and shall be able to be connected to conductors with a nominal cross-sectional area of ??less than 10 mm. Terminals shall be placed at a location convenient for connection to the reinforced earth conductor after the appliance is installed. Small fixed exposed metal parts, such as nameplates, etc., do not need to form an electrical connection with this terminal. 8 Screws and wiring
28
This chapter in GB4706.192 is applicable.
29 This chapter in GB4706.1-92 applies to creepage distances, electrical clearances and penetration insulation distances. 30 Heat resistance, flame resistance and tracking resistance
Except for the following content, this chapter in GB4706.1--92 is applicable: 30.3 This article is modified with the following content:
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