GB 17885-1999 Electromechanical contactors for household and similar purposes
Some standard content:
GB17885-—1999
EC Foreword
Cited standards
Marking, installation and maintenance
Normal use, installation and transportation conditions·Structural and performance requirements
Appendix A (Appendix to the standard)
Appendix B (Appendix to the standard)
Appendix C (Appendix to the standard)
Appendix D (Appendix to the standard)
Appendix E (Appendix to the standard)
Appendix F (Appendix to the standard)
Appendix G (Appendix to the standard)
Marking of contactor terminals and identification
Test sequence and number of samples…
Description of the method for adjusting the load circuit
Method for determining the short-circuit power factor
Measurement of electrical clearance and creepage distance
Rated impulse withstand voltage of contactors
Ignition test of heating wire
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GB17885-—1999
This standard is equivalent to IEC1095:1992 (first edition) "Electromechanical contactors for household and similar purposes". This standard specifies the basic requirements for electromechanical contactors for household and similar purposes (hereinafter referred to as "contactors"), including characteristics, working conditions, performance and tests and test methods to verify that these requirements are met; it also specifies the parameters that should be marked on the contactors and the data that the manufacturer should provide.
The appendices to this standard are all standard appendices. This standard was proposed by the State Bureau of Machinery Industry. This standard is under the jurisdiction of the National Technical Committee for Standardization of Low Voltage Electrical Appliances. The drafting unit of this standard is Shanghai Electric Science Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Zeng Ping and Han Jingsheng. This standard is entrusted to Shanghai Electric Science Research Institute for interpretation. TYKAAAGTKASA
GB17885-—1999
IEC Foreword
1) The formal resolutions or agreements of IEC on technical issues formulated by the technical committees in which all national committees with special concerns on the issue participate as much as possible express the international consensus on the issues involved. 2) These resolutions or agreements are used internationally in the form of standards and are recognized by national committees in this sense. 3) In order to promote international unification, IEC hopes that all national committees that do not have national rules should adopt EC standards as the basis for these rules within the scope permitted by their domestic conditions. The differences between the rules of each country and the IEC recommended standards should be clearly stated. This standard was prepared by IECTC17 Technical Committee (Switchgear and Controlgear) of Subcommittee 17B (Low-voltage switchgear and controlgear) in cooperation with Subcommittee 23E (Household circuit breakers and similar equipment) of ECTC23 Technical Committee (Electrical accessories).
This standard is based on the following documents.
DIS Documents
17Bco194
23ECO128
Voting Report
17BCO204
23ECO137
Detailed information on the voting for this standard can be obtained in the voting reports listed in the table above. N
1 Scope
National Standard of the People's Republic of China
Electromechanical contactors for household and similar purposes
Electromechanical contactors for household and similar purposesGB17885—1999
idtIEC1095:1992
This standard applies to electromechanical contactors for household and similar purposes, whose main contacts are used to connect circuits with a rated voltage not exceeding AC 440V, a rated working current less than or equal to 63A under the use category AC-7a, a rated working current less than or equal to 32A under the use category AC-7b, and a rated limiting short-circuit current less than or equal to 6kA. Contactors applicable to this standard are generally not used to disconnect short-circuit currents, so appropriate short-circuit protection devices should be installed as part of them when used (see 9.3.4).
This standard does not apply to the following electrical appliances:
a) Contactors that comply with GB14048.4;
b) Semiconductor contactors;
c) Contactors for special purposes; wwW.bzxz.Net
d) Auxiliary contacts of contactors (for relevant requirements, see GB14048.5). This standard specifies the following requirements:
a) Characteristics of contactors;
b) Contactors should meet the following requirements: 1) Operation and performance,
2) Dielectric properties,
3) Shell protection level,
4) Structure;
c) Tests and test methods used to verify that the above conditions are met; d) Test procedures and number of samples submitted for certification; e) Parameters that contactors should provide or parameters that should be provided in manufacturer samples. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1980-1996 Standard Frequency (eqvIEC96:1965) GB/T2423.3-1993 Basic Environmental Test Procedures for Electrical and Electronic Products Test Ca: Steady Humidity Test Method (eqvIEC GB/T2828-1987 Sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches) GB/T2829-1987 Sampling procedures and sampling tables for periodic inspection (applicable to inspection of stability of production process) GB/T2900.18-1992 Electrical terminology Low voltage electrical appliances (eqvEV50 (441): 1984) GB/T4026-1992 General rules for identification and application of alphanumeric system for wiring terminals and specific wire terminals of electrical equipment Approved by the State Administration of Quality and Technical Supervision on October 10, 1999 TTYKAAARTKAS
2000-05-01 GB17885—1999 (IEC445.1988) GB/T4205—1984 Standard direction of motion for operating parts of control electrical equipment (IEC447:1974) GB/T4207—1984 Determination of comparative tracking index and proof tracking index of solid insulating materials under humid conditions (IEC112:1979) GB/T4942.2—1993 Protection grade of low voltage electrical enclosure (IEC947-1:1988) GB/T5169.10—1997 Fire hazard of electrical and electronic products Test Test method Glow-wire test method General (idtIEC695-2-1/0:1994)
GB14048.4—1993
3 Low-voltage switchgear and controlgear Low-voltage electromechanical contactors and motor starters (eqvIEC947-4-1:1990)
GB14048.5—1993 Low-voltage switchgear and controlgear Control circuit devices and switching elements Part 1 Electromechanical control circuit devices (eqvIEC947-5-1:1990) GB/T16935.1—1997 Insulation coordination of equipment in low-voltage systems Part 1: Principles, requirements and tests (idtIEC66 4:1992)
IEC73:1984 Colors of indicator lights and buttons
IEC707:1981 Test methods for determining the flammability of solid electrical insulating materials exposed to fire ISO2039-2:1987 Plastics - Determination of hardness Part 2: Rockwell hardness 3 Terminology
For terms not specified in this standard, please refer to the relevant terms and definitions in GB/T2900.18 13.1 Basic terms
3.1.2 Short-circuit short-circuit
The accidental or intentional connection of two or more points in circuits that are normally at different voltages through a relatively low resistance or reactance.
3.1.9 Electric shock
The physiological and pathological effects caused by electric current passing through the human or animal body. 3.1.14 Integralclosure The enclosure that is an integral part of the electrical appliance and must be present. 3.2 Switching devices
3.2.13 Surge suppressor surge arrester protects electrical equipment from high transient overvoltage and limits the follow-on time and amplitude. 3.3 Switching device components
3.3.18 Screw-type terminal Screw-type terminal is used to tighten and loosen wires or to connect two or more conductors. The connection can be made directly or indirectly through various forms of screws or nuts. 3.3.19 Screwless-type terminal Screwless-type terminal is used to tighten and loosen wires or to connect two or more conductors. The connection can be made directly or indirectly through springs, wedge blocks, eccentric wheels or conical wheels. 3.3.20 Thread-forming tapping screw A screw with continuous threads that does not remove material from the hole when screwed in (see Figure 1 for an example). 3.3.21 Thread-cutting tapping screw Standard adoption instructions:
1 Only the terms listed in EC1095:1992 but not defined in GB/T2900.18-1992 are listed. The clause number is the same as EC1095:1992. 2
GB17885—1999
A screw with discontinuous threads, the threads of which can remove material from the hole when screwed in (see Figure 2 for an example). 3.3.23 Unprepared conductor unprepared conductor is a conductor that is inserted into the terminal and its insulation is stripped after cutting. Note: A conductor whose shape is adjusted to facilitate insertion into the terminal or the ends of multiple conductors are wired together can be considered as an unprepared conductor. 4 Prefabricated conductor preparedconductor
A conductor in which multiple conductors are welded together or whose ends are equipped with cable connectors, ferrules, etc. 3.4 Blank
3.6 Symbol gate
1e: Making and breaking current
1e: Rated working current
U.: Power frequency recovery voltage
U. Rated working voltage
cosp: power factor
Uimp: rated impulse withstand voltage
U.: rated insulation voltage
SCPD: short-circuit protection device
SELV: safety extra low voltage
CTI: comparative tracking index
4 Classification
The contactor type in 5.2 of this standard can be used as the basis for classification. 5 Characteristics
5.1 Characteristics Overview
Characteristics must be expressed by the following items:
a) Type of contactor (see 5.2);
b) Rated value and limit value of main circuit (see 5.3);c) Category of use (see 5.4);
d) Control circuit (see 5.5);
e) Auxiliary circuit (see 5.6);
f) Performance under short-circuit conditions (see 5.7);g) Switching overvoltage (see 5.8).
5.2 Type of contactor
This standard specifies the following contents:
5.2.1 Number of poles;
5.2.2 Control method.
a) Automatic (controlled by indicating switch or program controller); b) Non-automatic (for example: manual operation or button operation); c) Semi-automatic (i.e. partially automatic and partially non-automatic). Standard Adoption Instructions:
1EC10951992 is not listed in this collection.
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5.3 Rated value and limit value of main circuit
GB17885—1999
Rated value and limit value shall be determined in design and development according to the specific requirements of the product. 5.3.1 Rated voltage
Contactors are specified with the following rated voltages: 5.3.1.1 Rated working voltage (U.)
The rated working voltage of the contactor is a value that is combined with the rated working current to determine the purpose of the contactor, which is related to the corresponding test and use category.
For single-pole contactors, the rated working voltage is generally specified as the voltage across the two ends of the pole (contact disconnection position). For multi-pole contactors, the rated working voltage is specified as the phase-to-phase voltage. Note
1 Contactors can determine many rated working voltages and rated working currents or powers according to different working systems and usage categories. 2 Contactors can determine many rated working voltages and corresponding connecting and disconnecting capacities according to different working systems and usage categories. 3 It must be noted that the working voltage in the contactor may be different from the actual working voltage. 5.3.1.2 Rated insulation voltage (U,)
The rated insulation voltage of the contactor is a voltage value related to the dielectric test voltage and creepage distance, etc. In any case, the maximum rated working voltage value should not exceed the rated insulation voltage value. Note: For contactors without specified rated insulation voltage, the maximum value of its rated working voltage is considered to be the rated insulation voltage. 5.3.1.3 Rated impulse withstand voltage (Ump) Under specified test conditions, the contactor can withstand the impulse voltage peak with specified shape and polarity without breakdown. This value is related to electrical clearance, etc.
The rated impulse withstand voltage of the contactor shall be equal to or greater than the specified value of the transient overvoltage generated in the circuit to which the contactor is connected. Note: The preferred value of the rated impulse withstand voltage is shown in Table 18. 5.3.2 Current or power
The contactor is specified with the following currents:
5.3.2.1 Conventional thermal current (It)
The convention thermal current is the maximum test current value of the non-enclosed contactor when the temperature rise test is carried out in the atmosphere (see 9.3.3.3). The convention thermal current value shall be at least equal to the maximum rated working current value of the non-enclosed contactor under the eight-hour working system (see 5.3.4.1) (see 5.3.2.3).
Atmospheric conditions should be understood as air conditions without ventilation and external radiation under normal indoor conditions. Note
1 The convention thermal current is not a rated value and does not need to be marked on the electrical appliance. 2 Non-enclosed contactors are contactors for which the manufacturer does not provide a housing or contactors with a housing provided by the manufacturer, but the housing is usually not used as a protective housing for contactors.
5.3.2.2 Agreed enclosed thermal current (1te) The agreed enclosed thermal current value is specified by the manufacturer and is used to perform temperature rise tests on contactors installed in specified enclosures. If the manufacturer specifies that the contactor is enclosed and is usually used in combination with one or more enclosures of specified types and sizes, the contactor must be subjected to a temperature rise test of the agreed enclosed thermal current value. The test should use the specified minimum size enclosure (see 9.3.3.3). The agreed enclosed thermal current value should be at least equal to the maximum rated operating current value of the enclosed contactor under an eight-hour working system (see 5.3.4.1) (see 5.3.2.3).
If the contactor is usually used in an enclosure other than the specified one and the agreed thermal current value (1) test has been carried out, the agreed enclosed thermal current value test may not be required. In this case, the manufacturer should provide guidance on the enclosed thermal current value or derating factor. Notes
1 The agreed closed thermal current value is not a rated value and need not be marked on the appliance; 2 Enclosed contactors refer to contactors generally used in enclosures of specified types and sizes or contactors used in enclosures with multiple types. 4
GB17885-1999
5.3.2.3 Rated working current (1) or rated working power The rated working current of the contactor shall be specified by the manufacturer. The determination of the rated working current shall take into account the rated working voltage (see 5.3.1.1), the agreed thermal or agreed closed thermal current value (see 5.3.2.1 and 5.3.2.2), the rated frequency (see 5.3.3), the rated working system (see 5.3.4), the use category (see 5.4) and the type of protective enclosure. For contactors that directly switch on and off individual motors, the rated working current index may be replaced or supplemented by the maximum rated output power index of the motor controlled by the contactor under the condition of considering the rated working voltage. The manufacturer shall specify the assumed relationship between current and power. 5.3.3 Rated frequency
The power supply frequency used to design the contactor and corresponding to its characteristics. Note: The same contactor can have a set of rated frequencies or a rated frequency range. The rated frequency of the contactor shall comply with GB/T1980.5.3.4 Rated working system
The rated working systems under normal conditions are as follows:5.3.4.1 Eight-hour working system
This working system refers to the working system in which the main contacts of the contactor remain closed and carry a stable current for a long enough time for the contactor to reach thermal equilibrium, but must be disconnected for more than 8 hours.
Note: This working system is the basic working system for determining the agreed heating current value Ia and the agreed closed heating current value Ime of the contactor. 5.3.4.2 Intermittent cycle duty or intermittent duty This duty refers to a duty in which the load time and no-load time of the main contact of the contactor remain closed have a certain ratio value, and both times are short enough for the contactor to reach thermal equilibrium. The intermittent duty is characterized by the current value, the number of on-off operation cycles per hour and the load factor. The load factor is the ratio of the power-on time to the entire cycle, usually expressed as a percentage. According to the number of operation cycles that the contactor can perform per hour, the contactor can be divided into the following priority levels: Level
Number of operations per hour
Contactors used for intermittent duty can be named according to the characteristics of the intermittent duty. For example: an intermittent duty in which a current of 32A flows for 2 minutes every 5 minutes can be expressed as: 32A, 12 levels, 40%. 5.3.4.3 Short-time working system
Short-time working system refers to the working system in which the main contacts of the contactor remain closed for a time that is not enough for the contactor to reach thermal equilibrium, the load time is separated by the no-load time, and the no-load time is sufficient for the temperature of the contactor to return to the same temperature as the surrounding medium. 5.3.4.4 Cyclic working system
Cyclic working system refers to a working system in which operations are always performed regularly and repeatedly regardless of whether the load is stable or variable. 5.3.5 Normal load and overload characteristics
This clause stipulates the basic requirements for rated values under normal load and overload conditions. For specific requirements, see 8.2.4.
5.3.5.1 Ability to withstand overload current of motor switching The contactor used to switch the motor should be able to withstand the thermal stress generated by starting, accelerating the motor to normal speed and overloading during operation.
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For the specific requirements to meet the above conditions, see 8.2.4.3.5.3.5.2 Rated making capacity
GB17885—1999
For the requirements of various use categories (see 5.4), see 8.2.4.1. When the contactor is operated according to the requirements of 8.2.1.1 and 8.2.1.2, the rated making and breaking capacity is valid.
5.3.5.3 Rated breaking capacity
For the requirements of various use categories (see 5.4), see 8.2.4.1. When the contactor is operated according to the requirements of 8.2.1.1 and 8.2.1.2, the rated making and breaking capacity is valid.
5.3.5.4 Agreed operating performance
Agreed operating performance refers to a series of making and breaking operations specified in 8.2.4.2. 5.3.6 Rated limiting short-circuit current
The rated limiting short-circuit current of the contactor is the expected current value specified by the manufacturer. Under the test conditions specified in 9.3.4, the contactor protected by the short-circuit protection device (SCPD) specified by the manufacturer should be able to satisfactorily withstand the required current value within the action time of the protection device. The details of the specified SCPD should be specified by the manufacturer. Note: The rated limiting short-circuit current is expressed in terms of the effective value (rms) of the AC component. 5.4 Usage category
The usage category of the contactor is used to determine its purpose and is characterized by one or more of the following usage conditions. a) Current, expressed as a multiple of the rated operating current; b) Voltage, expressed as a multiple of the rated operating voltage; c) Power factor.
The standard usage categories are shown in Table 1.
Table 1 Use category
Use category\
Typical use
Low inductive load for household appliances and similar uses Household motor load 2
1) The contactor can be used for other use categories. In this case, the contactor should meet the requirements of this use category specified in GB14048.4. 2) AC-7b category can be used for occasional close connection and disconnection (inching) or reverse braking and reversing within a limited time. Within this limited time, the number of operations should not exceed 5 times per minute or 10 times within a 10min cycle. Each use category is characterized by the current, voltage, power factor and other data in Tables 8 and 9 and the test conditions specified in this standard.
Since the making capacity and breaking capacity are directly related to the use category shown in Table 8, it is not necessary to specify the rated making capacity and breaking capacity separately.
Unless otherwise specified, the contactor of the AC-7b use category should be designed according to the making capacity corresponding to the starting characteristics of the motor (see Table 8). When the rotor of the motor is blocked and the starting current of the motor exceeds the specified value in Table 8, the operating current of the contactor shall be reduced accordingly. 5.4.1 Determination of the use category based on test results A contactor that has been tested based on one use category or under certain combination parameters (for example, the maximum working voltage and current, etc.) can be used for another use category without testing, provided that: the contactor has been tested according to the parameters specified in Tables 8 and 10, and the current of the temperature rise test is verified to be not less than the rated working current of the selected use category under the long-term working system, and the parameters and test circuits of the selected use category are not more severe than those tested. 5.5 Control circuit
The characteristics of the control circuit are:
a) current type;
b) rated frequency;
..comGB 17885-1999
c) rated control circuit voltage U. (nature and frequency); d) rated control power supply voltage U, (nature and frequency); e) suitability for connection to safety extra-low voltage (SELV) circuit. Note: The difference between the two voltages in c) and d) is that the former is the voltage across the connected contact (a contact) in the control circuit, and the latter is the voltage applied to the wiring terminals in the contactor control circuit. The control power supply voltage is different from the control circuit voltage because it appears in the built-in transformer, rectifier, resistor, etc. The rated control circuit voltage and rated frequency (if any) are parameters for determining the operating characteristics and temperature rise characteristics of the control circuit. 5.6 Auxiliary circuit
The characteristics of the auxiliary circuit include the number and type of contacts (a contacts, b contacts) in each circuit and the rated values specified in GB14048.5.
The characteristics of the auxiliary contacts and switches shall meet the requirements of GB14048.5. 5.7 Performance under short-circuit conditions
The contactor shall indicate its protection against short-circuit current The type, rating and characteristics of the SCPD, the requirements of which are shown in 8.2.5. 5.8 Switching overvoltage
See 8.2.6.
6 Marking, installation and maintenance
6.1 Types of markings
The manufacturer shall provide the following markings. 6.1.1 Nameplate
a) Manufacturer's name or trademark;
b) Product name, model or serial number; c) Standard number that complies with (if the manufacturer declares compliance). 6.1.2 Characteristics and basic ratings
d) Rated working voltage;
e) Utilization category and rated working current (or rated power) at rated working voltage; f) Rated frequency (such as 50Hz or 50Hz/60Hz); g) Rated working mode and intermittent working mode level (if any); h) Rated making and breaking capacity, which can be replaced by the usage category (if applicable). Safety and installation:
i) Rated insulation voltage;
i) Rated impulse withstand voltage (if specified);k) Enclosure protection degree (IP symbol);
1) Pollution degree;
m) Rated limiting short-circuit current and SCPD type, current rating and characteristics;n) Switching overvoltage.
Control circuit (should be marked on the contactor or its coil):o) Rated control circuit voltage, current type and rated frequency;p) If necessary, rated control power supply voltage, current type and frequency. Control circuit for connecting SELV power supply:q) Adaptability of control circuit connected to SELV power supply, providing the voltage of main circuit power supply higher than the voltage of SELV circuit. Auxiliary circuit:
Standard adoption instructions:
1EC10951992 does not specify the product name. TTYKAAARTKASA
f) Rated value of auxiliary circuit.
6.2 Marking
The marking should be not easy to wear and easy to identify. GB17885—1999
In order to ensure that all data can be obtained from the manufacturer, a) and b) in 6.1.1 must be marked on the contactor, preferably on the nameplate of the contactor.
The contactor should also be marked with the following data and be easily visible after installation: the direction of movement of the actuator (if applicable); - the position mark of the actuator;
Qualification mark or certification mark (if applicable); - for miniature contactors, symbols, color codes or letter codes; -P code and protection level against electric shock (if applicable) should be marked on the contactor as much as possible. 6.Item k) in 1 should be marked on the housing, item c) and the qualified mark (or certification mark) should be marked on the nameplate, and items d) to j) and the data of item 1)) should be marked on the nameplate or on the contactor or in the relevant documents of the manufacturer. For the marking of the terminal, see Appendix A.
The mark should not be placed on the screws, removable gaskets or other removable parts. Note: The additional use categories in GB14048.4 can also be marked on the contactor (see the note in Table 1). 6.3 Installation, operation and maintenance instructions
The manufacturer shall specify the installation, operation and maintenance conditions of the contactor during operation or after a fault in its documents or samples. If necessary, the special and correct installation, use and operation methods of the contactor shall be specified in the contactor transportation, installation and operation instructions.
The above documents shall specify the degree and frequency of recommended maintenance (if any). 7 Normal use, installation and transportation conditions
7.1 Normal use conditions
7.1.1 Ambient air temperature
The upper limit of the ambient air temperature is +40℃, and its average temperature within 24 hours does not exceed +35℃. The lower limit of the ambient air temperature is -5℃.
For contactors without a housing, the ambient air temperature refers to the air temperature around it. For contactors with a housing, the ambient air temperature refers to the temperature outside the housing.
Contactors that are not within this temperature range should be used as special designs or according to the requirements provided in the manufacturer's samples. 7.1.2 Altitude
The altitude of the installation site shall not exceed 2000m.
For contactors used at altitudes above 2000m, the decrease in dielectric strength and air cooling need to be considered. 7.1.3 Atmospheric conditions
7.1.3.1 Humidity
When the maximum temperature is +40℃, the relative humidity of the air shall not exceed 50%. Higher relative humidity can be allowed at lower temperatures, for example, the relative humidity can be 90% at +20℃. Measures should be taken for occasional condensation due to temperature changes. 7.1.3.2 Pollution level
The pollution level is related to the environmental conditions in which the contactor is used. Note: The microenvironment of the electrical clearance or creepage distance determines the impact on insulation, not the environment of the contactor. The microenvironment of the electrical clearance or creepage distance may be better or worse than the contactor environment. The microenvironment includes all factors that affect insulation, such as climate conditions, electromagnetic conditions, pollution generation, etc.
For contactors used in enclosures or contactors in which the enclosure is a component of the contactor, the pollution level of the environment inside the enclosure should be selected. 8
GB17885—1999
In order to facilitate the determination of electrical clearance and creepage distance, the micro-environment is divided into the following four pollution levels (see Table 19 and Table 20 for electrical clearance and creepage distance of different pollution levels.
Pollution level 1: No pollution or only dry non-conductive pollution. Pollution level 2, generally only non-conductive pollution, but occasional short-term conductivity caused by condensation must be considered. Pollution level 3: Conductive pollution, or dry non-conductive pollution becomes conductive pollution due to expected condensation. Pollution level 4: Persistent conductive pollution, such as pollution caused by conductive dust or rain and snow. Contactors for household and similar purposes are generally used in pollution level 2. 7.2 Transportation and storage conditions
Unless otherwise specified, the following temperature range applies to transportation and storage: -25℃~+55℃, short-term (within 24h) can be +70℃. 7.3 Installation
Connection The contactor shall be installed according to the manufacturer's regulations. 8 Structural and performance requirements
8.1 Structural requirements
Contactors with a housing, whether or not the housing is a component of the contactor, shall be designed to withstand the stress generated during installation and normal use, and shall also have a specified level of resistance to abnormal heat and fire. Note: A closed housing contactor is a contactor installed in a housing, and its housing shall be designed to accommodate only one contactor. 8.1.1 Materials
The materials used in the contactor shall be able to verify their suitability through the following tests, which shall be conducted on the contactor and (or) the components of the contactor (if it cannot be conducted on the contactor). a) Aging resistance test (see 8.1.1.1)
b) Moisture resistance test (see 8.1.1.2); c) Heat resistance test (see 8.1.1.3); d) Resistance to abnormal heat and fire hazard test (see 8.1.1.4); e) Rust resistance test (see 8.1.1.5). In some cases, the test can be carried out on the material instead of on the contactor. c) and d) should be carried out on the contactor or on the appropriate parts of the contactor as much as possible. 8.1.1.1 Aging test
Elastic parts of the contactor made of rubber, polyvinyl chloride (PVC) or similar materials (such as gaskets, sealing rings, films and screw cover gaskets, etc.) should have aging resistance.
See 9.2.1.1 for the test method.
8.1.1.2 Moisture resistance test
The contactor should be able to prevent the influence of moisture during normal use. See 9.2.1.2 for the test method.
8.1.1.3 Heat resistance test
All parts away from live parts in enclosed, semi-enclosed and non-enclosed contactors should not be harmfully affected by the highest temperature that can be reached during normal use.
See 9.2.1.3 for the test method.
8.1.1.4 Test against abnormal heat and fire hazards The thermal stress of insulating material parts due to electrical effects may reduce the safety performance of the contactor. These parts should not be subject to the harmful effects of abnormal heat and fire.
See 9.2.1.4 for the test method.
If the test must be carried out on multiple places of the same sample, it should be noted that the damage caused by the previous test should not affect the subsequent 9
STYKAAAGIKAS2 Transportation and storage conditions
Unless otherwise specified, the following temperature range applies to transportation and storage: -25℃~+55℃, +70℃ for a short time (within 24h). 7.3 Installation
The contactor should be installed according to the manufacturer's regulations. 8 Structural and performance requirements
8.1 Structural requirements
Contactors with shells, whether or not the shell is a component of the contactor, should be designed to withstand the stress generated during installation and normal use, and should also have a specified level of resistance to abnormal heat and fire. Note: A closed shell contactor is a contactor installed in a shell, and its shell should be designed to only fit one contactor. 8.1.1 Materials
The materials used in the contactor should be able to verify their applicability through the following tests, and the tests should be carried out on the contactor and (or) the components of the contactor (if it cannot be carried out on the contactor). a) Aging resistance test (see 8.1.1.1)
b) Humidity resistance test (see 8.1.1.2); c) Heat resistance test (see 8.1.1.3); d) Abnormal heat and fire hazard resistance test (see 8.1.1.4); e) Rust resistance test (see 8.1.1.5). In some cases, the test can be carried out on the material instead of on the contactor. c) and d) should be carried out on the contactor or on the appropriate parts of the contactor as much as possible. 8.1.1.1 Aging resistance test
Elastic parts of the contactor made of rubber, polyvinyl chloride (PVC) or similar materials (such as gaskets, sealing rings, films and screw cover gaskets, etc.) should have aging resistance.
See 9.2.1.1 for the test method.
8.1.1.2 Humidity resistance test
The contactor should be able to prevent the influence of moisture during normal use. See 9.2.1.2 for the test method.
8.1.1.3 Heat resistance test
All parts away from live parts in enclosed, semi-enclosed and non-enclosed contactors should not be harmfully affected by the highest temperature that can be reached during normal use.
See 9.2.1.3 for the test method.
8.1.1.4 Test against abnormal heat and fire hazards The thermal stress of insulating material parts due to electrical effects may reduce the safety performance of the contactor. These parts should not be harmfully affected by abnormal heat and fire.
See 9.2.1.4 for the test method.
If the test must be carried out on multiple places on the same sample, it should be noted that the damage caused by the previous test should not affect the subsequent 9
STYKAAAGIKAS2 Transportation and storage conditions
Unless otherwise specified, the following temperature range applies to transportation and storage: -25℃~+55℃, +70℃ for a short time (within 24h). 7.3 Installation
The contactor should be installed according to the manufacturer's regulations. 8 Structural and performance requirements
8.1 Structural requirements
Contactors with shells, whether or not the shell is a component of the contactor, should be designed to withstand the stress generated during installation and normal use, and should also have a specified level of resistance to abnormal heat and fire. Note: A closed shell contactor is a contactor installed in a shell, and its shell should be designed to only fit one contactor. 8.1.1 Materials
The materials used in the contactor should be able to verify their applicability through the following tests, and the tests should be carried out on the contactor and (or) the components of the contactor (if it cannot be carried out on the contactor). a) Aging resistance test (see 8.1.1.1)
b) Humidity resistance test (see 8.1.1.2); c) Heat resistance test (see 8.1.1.3); d) Abnormal heat and fire hazard resistance test (see 8.1.1.4); e) Rust resistance test (see 8.1.1.5). In some cases, the test can be carried out on the material instead of on the contactor. c) and d) should be carried out on the contactor or on the appropriate parts of the contactor as much as possible. 8.1.1.1 Aging resistance test
Elastic parts of the contactor made of rubber, polyvinyl chloride (PVC) or similar materials (such as gaskets, sealing rings, films and screw cover gaskets, etc.) should have aging resistance.
See 9.2.1.1 for the test method.
8.1.1.2 Humidity resistance test
The contactor should be able to prevent the influence of moisture during normal use. See 9.2.1.2 for the test method.
8.1.1.3 Heat resistance test
All parts away from live parts in enclosed, semi-enclosed and non-enclosed contactors should not be harmfully affected by the highest temperature that can be reached during normal use.
See 9.2.1.3 for the test method.
8.1.1.4 Test against abnormal heat and fire hazards The thermal stress of insulating material parts due to electrical effects may reduce the safety performance of the contactor. These parts should not be harmfully affected by abnormal heat and fire.
See 9.2.1.4 for the test method.
If the test must be carried out on multiple places on the same sample, it should be noted that the damage caused by the previous test should not affect the subsequent 9
STYKAAAGIKAS
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