GB 4706.1-1992 General safety requirements for household and similar electrical appliances
Some standard content:
National Standard of the People's Republic of China
Safety of household and similar electrical appliances
General
Requirements
Safety of household and similar electrical appliancesGeneral requirements
GB 4706.1- 92 | | tt | | IEC335-1 | edition) and revisions No. 1, 2, 3, 4, 5, and 6 (1977, 1979, 1982, 1984, 1986, 1988). 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.
National standards cited in this standard:
GB1002 single-phase plug and socket type, basic parameters and dimensions 5 incandescent lamp holder type, basic parameters and dimensions GB1006
screw-type lamp holder Types and sizes
GB1406
AC motor capacitors
GB3667
GB4207
Compared tracking index and leakage resistance of solid insulating materials under humid conditions Determination method of marking index GB4343
Measurement method and allowable value of radio interference characteristics of power tools, household appliances and similar appliances GB5013.1
Rubber insulated flexible cables with rated voltage 450/750V and below Part 1 General provisions 2 Rubber insulated flexible cables with rated voltage 450/750V and below Part 2 General rubber sheathed flexible cables GB5013.2
GB5023.1 General provisions for polyvinyl chloride insulated cables (wires) with rated voltage 450/750V and below GB5023.3 Flexible cables (wires) for connecting polyvinyl chloride insulated cables (wires) with rated voltages 450/750V and below. Fire hazard test for electrical and electronic products. Glow wire test methods and guidelines GB5169.4
GB5169.5 Electrical Needle flame test method for fire hazard test of electronic products GB5169.6 Bad contact test method of heater for fire hazard test of electrical and electronic products 3 Safety requirements for household and similar general-purpose electronic and related equipment powered by grid power supply GB8898
GB11020 Test method for determining the combustion performance of fixed electrical insulating materials after exposure to an ignition source GB11021
Evaluation and classification of heat resistance of electrical insulation
Other IEC publications cited in this standard: ||tt| |IEC127 micro fuse tubular fuse IEC127-3 micro fuse tubular fuse part 3: sub-micro fuse IEC227-5 rated voltage 450/750V and below PVC insulated cable part 5 soft wire or cable IEC245-4 Rubber insulated cables with rated voltage 450/750V and below Part 4 Flexible wires or cables IEC320 Appliance couplers for household and similar general purposes IEC328 Appliance switches
IEC384-14 Fixed capacitors for electronic equipment Part 14 Sub-specification: Test of fixed capacitors to suppress radio interference
Selection of methods and general requirements
Safety of IEC601 medical electrical equipment
National Technical Supervision Bureau 1992-01-30 Approved 1992-10 -01 Implementation
GB4706.1-92
IEC685-2-1 Connections (terminating and/or tapping) for household and similar general-purpose fixed electrical installations IEC730 Household and similar general-purpose electrical appliances Safety of automatic controllers IEC817 spring impact tester and its calibration Part 1: General requirements
1 Scope
1.1 This standard applies to electric heating appliances and electrically or magnetically driven appliances for household and similar purposes. This standard also applies to appliances that are not for general household use but are still dangerous to the public, such as hairdressing appliances, soldering irons, glue boilers, sterilizers, infrared rays used by people unfamiliar with electricity in shops, light industrial factories and farms. Radiators, heating boilers, water pumps, lawn mowers, etc. Except for electrical toys, this standard does not take into account certain special hazards in nurseries and other places where unsupervised old, young, sick and weak people live. In this case, additional safety requirements need to be proposed. This standard does not apply to:
Appliances specially designed for industry;
In environments with corrosive and explosive gases (dust, vapor or gas) Appliances for local use: separate electric motors;
- high-frequency heating appliances (except microwave stoves); - radio and television receiving equipment according to GB8898; medical appliances according to IEC601\.
Record players and similar electric appliances used in or with electronic equipment are subject to GB8898. Additional requirements apply to appliances used on vehicles, ships or aircraft. Special requirements are required for appliances used in tropical areas. 1.2 This standard deals with safety and takes into account the impact on safety of components required to achieve the required levels of suppression of radio interference and television interference.
2 Terminology
2.1 Unless otherwise specified, the voltages and currents used in this standard are effective values. The term electric motor includes magnetic drives. 2.2 The terms used in this standard are as follows:
2.2.1 Rated voltage ratedvoltage
The voltage specified by the manufacturer for the appliance (three-phase power supply is the phase-to-phase voltage). 2.2.2 Rated voltage range ratedvoltagerange The voltage range specified by the manufacturer for the appliance, expressed by upper and lower limits. 2.2.3 Working voltage workingvoltage
The highest voltage that the part under consideration can withstand when the appliance is operating at its rated voltage and normal use conditions. Normal conditions of use include voltage changes on the appliance caused by circuit breaker operation or damaged lamps or similar circumstances. When considering the operating voltage, the effect of transient voltages on the power supply is negligible. 2.2.4 Rated input power ratedinput
The input power specified by the manufacturer for the appliance under sufficient heat dissipation conditions or under normal load and normal operating temperature. 2.2.5 Rated current ratedcurrent
Note: 1) IEC601 "Safety of Medical Electrical Equipment" can be found in the translation of Shanghai Medical Devices Research Institute. The current specified by the manufacturer for the appliance.
GB4706.1-92
If the current of the appliance is not specified, the rated current referred to in this standard is: the current calculated from the rated input power and rated voltage of a pair of electric heaters. For a pair of electrical appliances, the current measured when the appliance is operated at rated voltage and normal load. 2.2.6 Rated frequency ratedfrequency
The frequency specified by the manufacturer for the appliance.
2.2.7 Rated frequency range ratedfrequencyrange The frequency range specified by the manufacturer for the appliance, expressed by upper and lower limits. 2.2.8 Rated liquid capacity ratedcapacity is an appliance with a liquid container and its designed liquid capacity. 2.2.9 Detachable flexible cable or cord is a flexible cable or cord connected to an appliance through an appropriate appliance connector for the purpose of connecting to power or other purposes. Wire assembly according to IEC3201.
2.2.10 power supply cord powersupplycord, a flexible cable or cord fixed or assembled to an appliance by one of the following methods for connection to the power supply: X connection (type A specially prepared flexible cable or cord replaces the original flexible cable or cord connection method.
M connection (typeMattachment) can be easily made without special tools using special flexible cables or cords (such as those with molded protective terminals or crimp terminals) or by replacing the mounting cord. A component of the cord to replace the original flexible cable or cord connection method. Y connection (type Yattachment) is a connection method in which the original flexible cable or cord can be replaced only with a special tool that can obtain such a coupling device or can manufacture such a coupling device. The Y connection method can be used for ordinary flexible cables or cords or special flexible cables or cords. Z connection (type Zattachment) A connection method in which flexible cables or cords cannot be replaced without destroying or damaging the appliance. 2.2.11 Power leads supplyleads
A set of leads that have been connected to the appliance before leaving the factory and are used to connect fixed circuits. They are generally set in compartments and special junction boxes within the appliance and can also be attached to the appliance.
2.2.12 Basic insulation basic insulation is used to provide basic protection for live parts against electric shock. Basic insulation need not include dedicated functional insulation. 2.2.13 Supplementary insulation: Once the basic insulation fails, in order to ensure safety and prevent electric shock, another independent insulation is provided in addition to the basic insulation. 2.2.14 Double insulation doubleinsulation is an insulation consisting of basic insulation and supplementary insulation. 2.2.15 Reinforced insulation reinforcement: A separate insulation system on live parts that, under the conditions specified in this standard, provides a degree of protection against electric shock equivalent to double insulation.
"Insulation system" does not mean that the insulation must be a uniform piece, it can be composed of several layers, but it cannot be tested individually like supplementary insulation or basic insulation.
2.2.160 class0appliance Appliances that rely on basic insulation to prevent electric shock. If there are easily accessible conductive parts, there is no means of connection between these parts and protective conductors in fixed distribution lines, and safety depends on environmental conditions in the event of damage to the basic insulation. Note: 1) IEC320 "Couplers for Household and Similar General Purpose Appliances" can be found in the translation by Guangzhou Daily Electrical Appliances Research Institute. GB4706.1-92
Class 0 devices have a partial or complete shell of basic insulating material, or a metal shell with appropriate insulation to separate live parts. Appliances with enclosures of insulating material are considered to be Class I or Class 0I structures if they have provisions for internal earthing parts. Class 0 appliances may have double-insulated or reinforced-insulated components, and may have components operating at safety extra-low voltage. 2.2.1701 class0Iappliance is an appliance that has at least complete basic insulation and is equipped with a grounding terminal, but the power cord does not have a grounding conductor, the plug does not have a grounding prong, and it cannot be inserted into a power socket with a grounding jack. Class 0I appliances may have double-insulated or reinforced-insulated components, and may have components operating at safety extra-low voltage. 2.2.18 Class I appliances The protection against electric shock of class I appliances not only relies on basic insulation, but also has an additional safety measure. Its accessible conductive parts are connected to the protective earthing conductor in the fixed circuit. Once the basic insulation fails Keep accessible conductive parts from becoming live parts. "Class appliances may have double or reinforced insulating parts and may have parts operating at safety extra-low voltage. For appliances with flexible cables or cords, this regulation includes protective conductors that are part of the flexible cable or cord. 2.2 .19 Class Appliances classIappliance
The protection against electric shock of appliances not only relies on basic insulation, but also provides additional safety measures of double insulation or reinforced insulation, but has no protective earthing or measures that depend on the installation conditions
This category. The appliance may be one of the following types: ① Appliances with a durable and firmly integrated shell of insulating material. Except for small metal parts such as nameplates, screws, rivets, etc., all metal parts contained in the shell are protected by at least Insulation equivalent to reinforced insulation is isolated from live parts. This type of appliance is called insulated enclosed Class I appliances
② Appliances with solidly integrated metal shells, except for some that are obviously suitable for double insulation. In addition to reinforced insulation for unconnected parts, all of these appliances are called metal-embedded enclosed Class I appliances.
The outer shell of fully insulated Class I appliances can constitute additional insulation. Or part or all of the reinforced insulation. If the appliance is entirely double-insulated and/or reinforced-insulated and has a grounding terminal or grounding contact, it can be considered a Class 1 or Class 0I appliance.
Class I appliances. There is a device for maintaining the continuity of the protective circuit, provided that the device is internal to the appliance and separated from accessible conductive parts by double insulation or reinforced insulation. Class I appliances may have parts operating at safety extra low voltage. 2.2.20. Class1appliance
Appliances that rely on safety extra-low voltage power supply to prevent electric shock, and at the same time, no voltage higher than safety extra-low voltage is generated in any internal part
Appliances that operate with safety extra-low voltage. If it contains internal circuits whose working voltage is not safety extra-low voltage, it is not included in this category, and additional requirements are required
2.2.21 Extra-low voltage
extra-lowvoltage||tt| |When the appliance is working at the rated voltage, the voltage of the power supply inside the appliance shall not exceed 42V between the conductors or the conductors and the ground. For three-phase power supply, the voltage between the phase line and the neutral line shall not exceed 24V, especially Low-voltage circuits are only isolated from other circuits by basic insulation. 2.2.22 Safety extra-low voltage The nominal voltage between conductors and between phase conductors and ground conductors does not exceed 42V. The voltage between neutral lines shall not exceed 24V, and the no-load voltage shall not exceed 50V and 29V respectively. If the safety extra-low voltage is obtained from the power grid, it must be through a safety isolation transformer or a converter with an independent winding. The specified voltage limit is. Based on the assumption that the safety isolating transformer operates at its rated supply voltage. 2.2.23 Safety isolating transformer A transformer that uses at least insulation equivalent to double insulation or reinforced insulation to isolate the input winding from the output winding. The voltage regulator GB4706.1-92
is designed to supply power to distribution lines, appliances or other equipment operating under safe extra-low voltage. 2.2.24 Portable appliance portable appliance An appliance that can be moved when working or can be easily moved from one place to another when connected to a power source 2.2.25 hand-held appliance A portable appliance that is held by hand during normal use, if it has a motor , it forms an integral whole with the appliance. 2.2.26 Stationary appliance stationary appliance is fixedly installed or has a mass exceeding 18kg and does not have a handle. 2.2.27 Fixed-installed appliance fixedappliance is an appliance fixed on a bracket or a specific location. Adhesives are not considered as a method of fastening fixed appliances to supports, except where specifically permitted in Part 2 of the special requirements for safety of products.
2.2.28 Built-in appliance appliance for building-in Appliances intended to be installed in cabinets or recesses, or embedded in walls or similar locations. Generally speaking, built-in appliances do not come with a casing, because some panels naturally become protection against electric shock after installation. 2.2.29 Full heat dissipation conditions conditionsofadequateheatdischarge The working state of electric heating appliances under normal use conditions. 2.2.30 Normal load normallord
The load exerted on the electric appliance, the stress of which is equivalent to the stress generated under normal use conditions. Pay attention to whether there are any signs indicating short-term or intermittent operation. If there is an electric heating element, Unless otherwise specified, they should function as in normal use. 2.2.31 rated operation time rated operation time The working time specified by the manufacturer for the appliance. 2.2.32 Continuous operation: Work indefinitely under normal load or under sufficient heat dissipation conditions. 2.2.33 Short-time operation: Under normal load or sufficient heat dissipation conditions, it works in a specific cycle starting from the cold state. The time between each operating cycle should be sufficient to allow the appliance to cool to approximately room temperature.
2.2.34 intermittent operation A series of tasks of the same specific period, each period including a period of operation under normal load or full heat dissipation conditions and a subsequent period of rest to allow the appliance to idle or shut down. time. 2.2.35 Non-detachable parts Non-detachable parts Parts that can only be removed with the help of tools. 2.2.36 Detachable parts detachablepart Parts that can be removed without the use of tools. 2.2.37 Thermostat thermostat
A thermal device whose operating temperature can be fixed or adjustable. During normal operation, it maintains the temperature of the appliance or appliance parts by automatically turning on or off the circuit. between a certain range. 2.2.38 temperature limiter temperature limiter action temperature can be fixed or adjustable thermal device. During normal operation, when the temperature of the appliance or appliance parts reaches a predetermined value, the circuit is connected or disconnected.
The temperature limiter will not respond in reverse during the normal operating cycle of the appliance, and it may or may not have a manual reset device. 2.2.39 Thermal cut-out is a device that can automatically cut off the circuit or reduce the current during abnormal operation to limit the temperature of the appliance or appliance components. Its structure prevents the user from changing its setting value. | |tt | 2.2.41 Non-self-resetting thermal cut-out thermal circuit breaker non-self-resetting thermal cut-out requires manual reset or component replacement to restore circuit connection. 2.2.42 Tool tool
A screw driver, coin or any other object that can be used to operate screws or similar fasteners. 2.2.43 Creepage distance creepagedistance The shortest distance measured along the surface of the insulator between two conductive parts or between the conductive part and the boundary of the appliance. 2.2.44 Clearance
The shortest distance measured through air between two conductive parts or between a conductive part and the boundary of the appliance. The boundary surface of the appliance is the outer surface of the enclosure, which is considered as if a metal foil were pressed against the accessible surface of the insulating material.
2.2.45 All-pole Disconnection For single-phase AC appliances and DC appliances, two power conductors are disconnected by one switching action. For appliances connected with more than two power conductors, it is disconnected by one switching action. The switching action disconnects all power conductors except the ground conductor. The protective earth conductor is not considered to be a power conductor. 2.2.46 Visibly glowing heating element. When the appliance is installed and ready for use, the electric heating element can be partially or completely visible from the outside of the appliance. When the appliance operates under sufficient heat dissipation conditions until it reaches In steady state, its temperature is at least 650℃; its power supply voltage should make the input equal to the minimum rated input. 2.2.47 Accessible parts or accessible surfaces accessiblepartoraccssiblesurface Parts or surfaces that are accessible with the standard test finger shown in Figure 1. 2.2.48 Shell body
This term includes all accessible metal parts, handle shafts, knobs, clips and similar parts, as well as metal foil in contact with all accessible surfaces of insulating materials; it does not include inaccessible metal parts. 2.2.49 Function and interconnection cable or cord functionandinterconnectioncableorcord is a flexible cable or cord provided as part of a complete appliance, except for connecting to the power grid. Specific examples of functional and interconnecting flexible cables or cords are remote control switching devices, exposed interconnecting wires between two components in an appliance, or independent signaling circuits.
3 General requirements
3.1 Appliances should be designed and manufactured so that they can operate safely during normal use and will not cause danger to people or the environment even if they are improperly operated during normal use.
Whether it is qualified or not is usually tested through all relevant tests. 4 General instructions in testing
4.1 The tests specified in this standard are all type tests. 4.2 Unless otherwise specified, all tests shall be conducted on the same sample in its factory state, and the sample shall be able to withstand all relevant tests.
If it is obvious from the design of the apparatus that it is not suitable for carrying out a certain test, the test may not be carried out. If the appliance is designed for different power supply voltages, AC and DC use, different speeds, etc., more than one sample is required. If the test of 11.10 must be carried out, additional samples must be added. If Class I appliances need to be disassembled to carry out relevant tests, an additional sample is required. For testing of parts of the appliance, additional samples of the parts may be requested and shall be provided with the appliance. GB4706.1-92
4.3 Unless otherwise specified, each test shall be conducted in the order of the provisions of this standard. Before starting the test, let the appliance operate at rated voltage to determine whether the appliance is in working condition. 4.4 Tests on the appliance or any movable parts on the appliance should be conducted in the most unfavorable position that may occur in normal use.
4.5 If the test results will be affected by the ambient air temperature, the temperature of the test room should be maintained at 20±5℃. However, if the temperature of any part of the appliance is limited by a heat-sensitive device or affected by the phase change temperature (such as the boiling temperature of water), the room temperature should be maintained at 23 ± 2°C. 4.6 AC appliances can only be tested with alternating current. For the frequency used, if it is marked with a rated frequency, use the rated frequency; DC appliances can only be tested with DC power; while appliances with both AC and DC use should be tested with a less favorable power source. For AC appliances that are not marked with a rated frequency or a frequency range of 50Hz to 60Hz, the less favorable frequency of 50Hz or 60Hz should be selected for testing.
For appliances that are not in the rated frequency range of 50Hz to 60Hz, the most unfavorable frequency within the rated frequency range should be selected for testing. For appliances designed to be suitable for multiple rated voltages, the most unfavorable voltage should be selected for testing. Appliances designed for use in one or more rated voltage ranges shall be tested at the most unfavorable voltage within the relevant rated voltage ranges, unless otherwise specified.
For electric appliances marked with a rated voltage range, when the power supply voltage is specified to be equal to the rated voltage multiplied by a factor, the power supply voltage is equal to:
When the factor is greater than 1, the upper limit of the rated voltage range Multiply by this factor. - When the factor is less than 1, the lower limit of the rated voltage range is multiplied by the factor. Where reference is made to the maximum or minimum rated input power, it refers to the input power related to the upper or lower limit of the rated voltage range, respectively. When testing DC appliances, the effect of polarity on the operation of the appliance should be considered. If an electric heating appliance without a motor is only designed to be suitable for a rated voltage range, the upper limit of the rated voltage range is usually the most unfavorable voltage within the range. If the appliance has an electric motor or is designed for use with more than one rated voltage or rated voltage range, the most unfavorable voltage shall, if necessary, be determined by practical tests using the minimum, average and maximum values ??of the rated voltage or rated voltage range. 4.7 For appliances with multiple optional heating elements or accessories, as long as the elements or accessories are within the scope of the appliance manufacturer's instructions, the element or accessory that produces the most unfavorable results should be selected for testing together. 4.8 If in normal use the heating element cannot operate without the motor running, the element should be tested with the motor running. If the electric heating element can operate without the motor running, the element shall be tested under the more unfavorable condition of running the motor or not running.
4.9 For appliances equipped with thermostats, adjusting devices or similar controllers, if the user is able to change the setting position on his own, these controllers should be adjusted to the most unfavorable setting position for the appliance for testing. If the setting device of the controller can be accessed without tools, this article applies regardless of whether it is set by hand or requires tools. On the contrary, if the setting device cannot be accessed without tools and does not need to be set by the user, this article only applies to settings that can be set by hand. Changing the setting position. Proper sealing prevents the user from changing the setting position. 4.10 Where appropriate, flush-mounted appliances should be installed in accordance with the manufacturer's installation instructions, but subject to normal installation conditions. 4.11 Unless otherwise specified, appliances powered by flexible cables or cords shall be tested together with appropriate flexible cables or cords. 4.12 For electric heating appliances, when it is specified that a voltage must be applied that can make its input power greater than the rated power, this voltage is only applicable to electric heating elements whose positive temperature coefficient of resistance is not obvious. For other electric heating elements, the voltage is determined as follows. First, apply the rated voltage to the electric heating element to reach the operating temperature, then quickly increase the power supply voltage to make the input power meet the relevant test requirements, and conduct the test in accordance with the regulations to maintain the power supply voltage value throughout the test period. Generally, the temperature coefficient is considered to be significant if, at rated voltage, the input power of the appliance under cold conditions differs by more than 25% from the input power at operating temperature.
4.13 For electric appliances, when normal load conditions are specified in the product's special safety requirements standard, the appliance is still loaded according to these conditions regardless of whether the appliance is marked for short-time operation or intermittent operation. Unless the design ensures that these conditions will obviously not occur during normal use.
GB4706.1—92
4.14 For electrical appliances, if the mains transformer is sold with the appliance, the test shall be carried out together with its transformer. 4.15 For clauses 8.6, 8.7, 16.4, 25.11 and 27.1, parts separated from live parts by double insulation or reinforced insulation are de-energized when the insulation is damaged, and between accessible metal parts and grounding terminals or grounding contacts In the case of connection, relevant tests still need to be carried out. 4.16 If Class 0I or Class I appliances have accessible metal parts, and these metal parts are not connected to the earth terminal or earthing point, they are not connected to live parts by intermediate metal parts connected to the earthing terminal or earthing point. Isolated, such parts shall be inspected in accordance with the appropriate requirements specified for Class I appliances.
4.17 If Class 0, Class 0I and Class 1 appliances have components operating at safety extra-low voltage, such components shall be inspected in accordance with the appropriate requirements specified for Class II appliances.
4.18 For appliances equipped with electronic circuits, refer to the regulations in Appendix B. For appliances equipped with electric motors that are not isolated from the power supply and whose basic insulation is not designed according to the rated voltage of the appliance, please refer to the provisions of Appendix F.
5 Ratings
5.1 Maximum rated voltage:
250V for portable single-phase AC appliances and portable DC appliances; 440V for all other appliances.
Determine compliance by inspecting the mark
This requirement of this standard is based on the assumption that the voltage between the power line and the ground wire does not exceed 254V during normal use. 6 Classification
6.1 Appliance classification:
(1) Classification according to protection against electric shock:
—Class 0 appliance;
—Class 0I appliance;
- Class appliances;
- Class I appliances;
- Class I appliances.
(2) Classification according to the degree of waterproof protection:
- ordinary appliances,
- drip-proof appliances:
- splash-proof appliances; ||tt| |Watertight appliances.
The classification number does not reflect the degree of safety of the appliance, but only the means of achieving safety. If the safety isolating transformer used to power an ear appliance is separate from the appliance and sold at the same time, the classification of the appliance remains unchanged. The requirements for appliance classification are proposed in Articles 22.1 and 22.2. 7 mark
7.1 The following marks should be on the appliance:
rated voltage or rated voltage range (V) (this mark is not required only for appliances with detachable electric heating elements); a power supply type and Symbol (if applicable), a rated frequency or rated frequency range (Hz), except for appliances that only use DC or appliances that are universal for AC 50Hz and 60Hz; rated input power (W or kW) (when greater than 25W), or rated current ( A);GB4706.1-92
A pair of electric appliances should be marked with the rated current (A) of the appropriate fuse. At this time, the starting current requires that the rated current of the fuse should be appropriately higher than the appliance nameplate. The rated current marked on the fuse (see 9.2); if the rated current of a suitable fuse is marked and the fuse is of the time-delay type, a description of the time/current characteristics should be included in the relevant mark. .
A manufacturer's name or agent's name, trademark or identification mark; a model of the appliance;
Rated working time or rated working time/rated interval time (h, min or s) only when necessary ); - a symbol for Class 1 construction (marked only on class appliances); - a symbol for the degree of waterproofing (only when necessary). Fixed appliances with multiple power supplies should be marked with the following warning: All power supplies must be disconnected before approaching the wiring device. This warning sign should be clearly visible near any live parts that may be touched during routine maintenance. Appliances with star or delta wiring should be clearly marked with two rated voltages (for example: 220△/380Y). Rated input power or rated current refers to the total maximum input power or current of all circuits that can operate simultaneously. If the appliance contains components whose operation can be selected by means of a control device, the rated input power refers to the power at the highest possible load.
Flags are allowed as long as they do not cause misunderstanding. If the electric motor of the appliance is separately marked, the appliance mark and the motor mark shall not cause doubt as to the rating and manufacturer of the appliance itself.
7.2 Appliances that work for short periods of time or intermittently should be marked with rated working time or rated working time/rated intermittent time respectively. The working hours are excepted when restricted by the structure of the appliance or by the working conditions stipulated in the special safety requirements of the product. Signs for short-time work or intermittent work should be consistent with normal use. The sign of intermittent work should be expressed as follows: rated working time/rated intermittent time. 7.3 Removable electric heating elements should be marked with:
- rated voltage or rated voltage range (V); rated input power (W or kW) (when greater than 25W); - manufacturer name or agent name, Trademark or identification mark; - model number or type parameters;
- a symbol of the degree of waterproof protection (if necessary). 7.4 If the appliance can be adjusted for different rated voltages or different rated input powers, the rated voltage or rated input power to which the appliance is adjusted should be clearly identifiable.
This requirement does not apply to appliances with Y-△ type wiring. For appliances that do not need to frequently change voltage, if the rated voltage or rated input power of the appliance to be adjusted can be determined from a circuit diagram fixed on the appliance, it is considered to meet this requirement; the circuit diagram can be fixed on the inside of a cover that must be opened to connect the power cord. , may also be drawn on card fastened to the lid, or on paper or similar signage firmly bonded to the lid with adhesive, but not on a sign loosely attached to the appliance that is not securely fastened . 7.5 For appliances or detachable electric heating elements marked with more than one rated voltage or rated voltage range, if the input power is greater than 25W, the rated input power corresponding to each of these voltages or voltage ranges should be marked. The upper and lower limits of the rated input power shall be marked on the appliance or removable heating element so as to clearly show the relationship between the input power and voltage, unless the difference between the upper and lower limits of the rated voltage range does not exceed 10% of the average value of that range , in this case, the sign of the rated input power is related to the average value of the rated voltage. If the difference between the input power of the appliance or detachable heating element in the cold state and the input power at the operating temperature is greater than 25%, the input power in the cold state should be added. The cold input power should be marked after the input power at the operating temperature. within brackets.1. There should be the following marks on the appliance:
rated voltage or rated voltage range (V) (this mark is not required only for appliances with detachable heating elements); - power supply type and symbol (if applicable), - Rated frequency or rated frequency range (Hz), except for appliances that only use DC or appliances that are universal for AC 50Hz and 60Hz; rated input power (W or kW) (when greater than 25W), or rated current (A); GB4706.1— 92
A pair of electric appliances should be marked with the rated current (A) of the appropriate fuse. At this time, the starting current requires that the rated current of the fuse should be appropriately higher than the rated current marked on the appliance nameplate (see 9.2); if the rated current of a suitable fuse is marked and the fuse is of the time-delay type, a description of the time/current characteristics should be included in the relevant marking.
A manufacturer's name or agent's name, trademark or identification mark; a model of the appliance;
Rated working time or rated working time/rated interval time (h, min or s) only when necessary ); - a symbol for Class 1 construction (marked only on class appliances); - a symbol for the degree of waterproofing (only when necessary). Fixed appliances with multiple power supplies should be marked with the following warning: All power supplies must be disconnected before approaching the wiring device. This warning sign should be clearly visible near any live parts that may be touched during routine maintenance. Appliances with star or delta wiring should be clearly marked with two rated voltages (for example: 220△/380Y). Rated input power or rated current refers to the total maximum input power or current of all circuits that can operate simultaneously. If the appliance contains components whose operation can be selected by means of a control device, the rated input power refers to the power at the highest possible load.
Flags are allowed as long as they do not cause misunderstanding. If the electric motor of the appliance is separately marked, the appliance mark and the motor mark shall not cause doubt as to the rating and manufacturer of the appliance itself. www.bzxz.net
7.2 Appliances that work for short periods of time or intermittently should be marked with rated working time or rated working time/rated intermittent time respectively. The working hours are excepted when restricted by the structure of the appliance or by the working conditions stipulated in the special safety requirements of the product. Signs for short-time work or intermittent work should be consistent with normal use. The sign of intermittent work should be expressed as follows: rated working time/rated intermittent time. 7.3 Removable electric heating elements should be marked with:
- rated voltage or rated voltage range (V); rated input power (W or kW) (when greater than 25W); - manufacturer name or agent name, Trademark or identification mark; - model number or type parameters;
- a symbol of the degree of waterproof protection (if necessary). 7.4 If the appliance can be adjusted for different rated voltages or different rated input powers, the rated voltage or rated input power to which the appliance is adjusted should be clearly identifiable.
This requirement does not apply to appliances with Y-△ type wiring. For appliances that do not need to frequently change voltage, if the rated voltage or rated input power of the appliance to be adjusted can be determined from a circuit diagram fixed on the appliance, it is considered to meet this requirement; the circuit diagram can be fixed on the inside of a cover that must be opened to connect the power cord. , may also be drawn on card fastened to the lid, or on paper or similar signage firmly bonded to the lid with adhesive, but not on a sign that is loosely attached to the appliance and is not securely fastened . 7.5 For appliances or detachable electric heating elements marked with more than one rated voltage or rated voltage range, if the input power is greater than 25W, the rated input power corresponding to each of these voltages or voltage ranges should be marked. The upper and lower limits of the rated input power shall be marked on the appliance or removable heating element so as to clearly show the relationship between the input power and voltage, unless the difference between the upper and lower limits of the rated voltage range does not exceed 10% of the average value of that range , in this case, the sign of the rated input power is related to the average value of the rated voltage. If the difference between the input power of the appliance or detachable heating element in the cold state and the input power at the operating temperature is greater than 25%, the input power in the cold state should be added. The cold input power should be marked after the input power at the operating temperature. within brackets.1. There should be the following marks on the appliance:
rated voltage or rated voltage range (V) (this mark is not required only for appliances with detachable heating elements); - power supply type and symbol (if applicable), - Rated frequency or rated frequency range (Hz), except for appliances that only use DC or appliances that are universal for AC 50Hz and 60Hz; rated input power (W or kW) (when greater than 25W), or rated current (A); GB4706.1— 92
A pair of electric appliances should be marked with the rated current (A) of the appropriate fuse. At this time, the starting current requires that the rated current of the fuse should be appropriately higher than the rated current marked on the appliance nameplate (see 9.2); if the rated current of a suitable fuse is marked and the fuse is of the time-delay type, a description of the time/current characteristics should be included in the relevant marking.
A manufacturer's name or agent's name, trademark or identification mark; a model of the appliance;
Rated working time or rated working time/rated interval time (h, min or s) only when necessary ); - a symbol for Class 1 construction (marked only on class appliances); - a symbol for the degree of waterproofing (only when necessary). Fixed appliances with multiple power supplies should be marked with the following warning: All power supplies must be disconnected before approaching the wiring device. This warning sign should be clearly visible near any live parts that may be touched during routine maintenance. Appliances with star or delta wiring should be clearly marked with two rated voltages (for example: 220△/380Y). Rated input power or rated current refers to the total maximum input power or current of all circuits that can operate simultaneously. If the appliance contains components whose operation can be selected by means of a control device, the rated input power refers to the power at the highest possible load.
Flags are allowed as long as they do not cause misunderstanding. If the electric motor of the appliance is separately marked, the appliance mark and the motor mark shall not cast doubt on the rating and manufacturer of the appliance itself.
7.2 Appliances that work for short periods of time or intermittently should be marked with rated working time or rated working time/rated intermittent time respectively. Except for those where the working hours are limited by the structure of the appliance or by the working conditions specified in the special safety requirements of the product. Signs for short-time work or intermittent work should be consistent with normal use. The sign of intermittent work should be expressed as follows: rated working time/rated intermittent time. 7.3 Removable electric heating elements should be marked with:
- rated voltage or rated voltage range (V); rated input power (W or kW) (when greater than 25W); - manufacturer name or agent name, Trademark or identification mark; - model number or type parameters;
- a symbol of the degree of waterproof protection (if necessary). 7.4 If the appliance can be adjusted for different rated voltages or different rated input powers, the rated voltage or rated input power to which the appliance is adjusted should be clearly identifiable.
This requirement does not apply to appliances with Y-△ type wiring. For appliances that do not need to frequently change voltage, if the rated voltage or rated input power of the appliance to be adjusted can be determined from a circuit diagram fixed on the appliance, it is considered to meet this requirement; the circuit diagram can be fixed on the inside of a cover that must be opened to connect the power cord. , may also be drawn on card fastened to the lid, or on paper or similar signage firmly bonded to the lid with adhesive, but not on a sign loosely attached to the appliance that is not securely fastened . 7.5 For appliances or detachable electric heating elements marked with more than one rated voltage or rated voltage range, if the input power is greater than 25W, the rated input power corresponding to each of these voltages or voltage ranges should be marked. The upper and lower limits of the rated input power shall be marked on the appliance or removable heating element so as to clearly show the relationship between the input power and voltage, unless the difference between the upper and lower limits of the rated voltage range does not exceed 10% of the average value of that range , in this case, the sign of the rated input power is related to the average value of the rated voltage. If the difference between the input power of the appliance or detachable heating element in the cold state and the input power at the operating temperature is greater than 25%, the input power in the cold state should be added. The cold input power should be marked after the input power at the operating temperature. within brackets.
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