Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T3702
1997-12-17
JB/T3702
This standard is revised based on JB/T3702-93 Time Relay. The content of this standard is still divided into 9 chapters, among which the original Chapter 1, most of the articles in the original Chapters 5 and 6, and the original Chapter 7 have been modified to a certain extent, and the new electrical inspection standards and packaging and shipping standards have been implemented. From the date of entry into force, this standard will replace JB/T 3702-93 and JB/T 6523--92 at the same time. This standard was proposed, drafted and managed by Xuchang Relay Research Institute of the Ministry of Machinery Industry. The main innovators of this standard are Li Tiejun, Ouyang Kun, and Yang Wei. 1 Scope
JB/T37021997
JB/T3702
JB/T652392
This standard specifies the product classification, technical requirements, inspection methods, inspection rules, marking, packaging, transportation, storage and other requirements of time relays.
This standard applies to time relays with single auxiliary input excitation base (hereinafter referred to as electrical appliances) used in power system relay protection or automatic control circuits, as the basis for design, production and use. This standard is only used for new relays.
2~Cited standards
The provisions of the following standards are included and constitute the provisions of this standard by reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T 2900.1—92
GB/T 2900. 17--94
GB/T6162—85
GB/1 7261—87
Basic terms of electrical terminology (negIEC50) Electrical terminology Electrical relays
Electrical disturbance test for static relays and protection devices (negIEC525-4-1976) Basic test methods for relays and relay protection devices GB/T14598.9—1995 Electrical maintenance Part 22 Electrical interference test for static relays and protection devices Part 3 Radiated electromagnetic field interference test (idtIFC255-·201984) JB/T 7102--1993
JB/T 7828—1995
ZB K45 020—90
ZB K45 032—90
3 Terms
Relay and its device housing protection grade (IP mark) Technical conditions for relay and its packaging, storage and transportation General technical conditions for power system protection, automatic relays and devices Electrostatic discharge interference test for relays and protection devices The terms and terms used in this standard are in accordance with the provisions of GB/T2900.1 and GB/T2900.17. 4 Product classification
4.1 Type classification
4.1.1 Classification by construction principle
Relays are divided into electromechanical type and static type according to their construction or principle. 4.1.2 Classification by input excitation properties
Relays are divided into DC time relays and AC time relays according to the nature of the input excitation quantity. 4.1.3 Classification by installation method
Relays are divided into embedded type and protruding type according to their installation method. 4.1.4 Classification by Wiring Method
Relays are classified into rear wiring and front wiring according to the wiring method installed on the panel. 4.1.5 Classification by Structural Type
1997-12-17
1998-02-01JB/T3702
Relays are classified into non-insertion type and insertion type according to the structural type. 4.1.6 Classification by Working System
Relays are classified into long-term working system and short-term working system according to the working system. 4.1.7 Classification by Whether or Not with Indicator
Relays are classified into with action indicator and without action indicator according to whether or not with indicator. 4.1.8 Classification by delay mode
Relays are classified by delay mode: delayed action after power on, instant return after power off, action when power on, delayed return after power off; delayed action after power on, delayed return after power off
4.2 Model and meaning
Relay models are determined by enterprises according to the standards for the compilation method of industry product models. 4.3 Rated parameters
a) AC voltage rating, 100, 110, 220, 380V: b) Shunt rating: 50, 60Hz;
c) DC voltage rating: 12, 24, 48, 110, 220V. 4.4: Dimensions and terminals
Outline dimensions, installation dimensions and terminal diagrams specified by enterprise standards. 4.5 Weight
Outline dimensions, installation dimensions and terminal diagrams specified by enterprise standards.
5 Technical requirements
5.1 Influencing quantities and influencing factors Standard conditions Reference values and test tolerances Influencing quantities and influencing factors Reference conditions Reference values and test tolerances See Table 1 Table 1 Influencing quantities and influencing factors Standard conditions Reference values and test tolerances Influencing quantities and influencing factors
Ambient temperature, ℃
Atmospheric pressure, ka
Relative humidity, %
Working position
External magnetic field induction intensity, tmT
Frequency, Hz
AC power waveform
AC component of DC power supply (ripple Wave)
Input excitation
Reference
Sine wave
Rated value
Standard limit values of nominal range of influence quantity and influence factor 5.
Test difference
20,+10
Inclination in any direction does not exceed 2°
0.5 in any direction
Variation factor is not more than 2%
Not more than 33%
The standard limit values of nominal range of influence quantity and influence factor are shown in Table 2. Within this range, the relay should work reliably. 2
JB/T3702
Table 2 Standard limit values of the nominal range of influencing quantities and influencing factors Influencing quantities and influencing factors
Ambient temperature,
Atmospheric pressure, kPs
Relative humidity, K
Working position and
External magnetic field induction intensity, mT
Frequency, Hz
AC power supply wave
AC component of DC power supply (ripple)
Amplitude of human excitation
DC rated When the rated voltage is 220V, 110V
The rated DC voltage is 48V and below
AC voltage
5.3 Other requirements for the places of use
Nominal range
25~～+4℃℃ model), -10～+50℃static model)24h flat temperature does not exceed 35℃
8a~110
The monthly average maximum relative humidity of the wettest month is 90%, the monthly average minimum temperature of the month is 25℃, and there is no dew on the surface of the month. When the maximum humidity is 40°, the average relative humidity shall not exceed .50% and deviate from the reference position by 5° in any direction. Specified by enterprise standards. Distortion factor shall not exceed 5% and not exceed 6% (80%~110°). Rated value. (90%~110%). Rated value. (85%~110%). Rated value. a) The use location shall not be allowed to have a grip response value and impact response value exceeding the values specified in 5.16 and 5.18 of this standard. b) The use location shall not have explosive media, and the surrounding media shall not contain gases and conductive media that corrode metals and damage insulation, and shall not be filled with steam. c) The use location shall have facilities to protect against rain, wind, sand and sand. 5.4 Limit values of extreme range of ambient temperature. The limit values of extreme range of ambient temperature are -25°C and 70°C. When the excitation is not applied to the relay under the limit value, no irreversible damage will occur. After the temperature returns to normal, the main performance of the relay shall still meet the requirements specified in 5.5 to 5.9 of this standard. 5.5 Action value
a) Under reference conditions, the action voltage of the air-flow relay shall not be greater than 85% of the rated voltage; b) Under reference conditions, the action voltage of the DC relay shall not be greater than 70% of the rated voltage, and the action voltage of the relay of the long-term working system shall not be greater than 75% of the rated voltage:
c) The state of the product shall be specified by the enterprise standard.
5.6 Return value
Unless otherwise specified in the industry standard, under reference conditions, the return value of the relay shall not be less than 5% of the rated value. 5.7 Delay setting range
Specified by the enterprise standard.
5.8 Delay consistency
When the rated excitation is applied to the relay, at the same setting point, the ratio of the difference between the maximum and minimum action time of five (ten) measurements and the average value of five (ten) measurements is selected from the following values according to the enterprise standard (electromechanical type is measured ten times): 5%; 2.5% 1%, 0.5%. 0.25%; 0.1% The action delay consistency can be expressed in absolute value. The average error of the delay setting value
The average error of the delay setting value of the relay should be selected from the following values according to the enterprise standard: 5% 2. 5% :1% 10. 5% 0.25% 0. 1%. The average error can be expressed in absolute value.
5,10 Power consumption
JB/T37021997
The power consumption of the relay at rated voltage should be specified by the enterprise standard. $.11 Impact of ambient temperature changes on performance a) When the ambient temperature changes within the nominal range, the variation of the relay delay setting value should be selected from the following values according to the enterprise standard: 5% 2.5% 11% 0.5%: 0.25% 10, 1%
The variation can be expressed in absolute value.
b) When the ambient temperature changes within the nominal range, the delay consistency of the relay should be no less than 1.5 times the delay consistency measured under the basic conditions; or otherwise specified in the product enterprise standard. S.12 Impact of excitation change on performance
When the voltage changes within the nominal range, the variation of the delay of each setting point of the relay and the delay value under the rated value should be selected from the following values according to the industry standard:
5%; 2.5%, 1% + 0.5%, 0.25%, 0.1% The variation can be expressed in absolute value.
5.13 Thermal performance (heat rise)
When the ambient temperature is 40℃, the long-term working relay shall be able to work for a long time under the condition of 1.1 times the rated input excitation, without causing thermal damage to the insulation or other electrical components, and the thermal rise shall not exceed 65K. The short-term working relay shall also meet this requirement after being under the above conditions for 1 minute. For short-term or long-term live working components (such as resistors, voltage regulators, etc.), the maximum temperature shall not exceed 150C, and shall not cause harmful thermal effects on adjacent components. 5.14 Insulation performance
The insulation performance of the product shall be tested under dry conditions without self-heating. 5.14.1 Insulation resistance
The insulation resistance value of each conductive circuit of the relay, measured by a test instrument with an open circuit voltage of 500V, shall not be less than 300M. 5.14.2 Dielectric strength
5.14.21 The following parts of the relay shall be subjected to dielectric strength test: a) Between the conductive circuit and the shell and the exposed non-live metal parts, and between the conductive circuits without electrical connection in the product (as specified in the enterprise standard). 5.14.2.2 The parts listed in 5.14.2.1 of this standard shall be subjected to an AC test voltage of 50Hz and 2kV for 1min. 5.14.2.3 During factory inspection, the test duration is allowed to be shortened to 18, but the test voltage value shall be increased by 10% at this time. 5.14.2.4 Qualification criteria
During the inspection, there should be no insulation breakdown or flashover in any part of the product. 3.14.3 Impact voltage
The parts listed in 5.14.2.1 of this standard should be able to withstand the standard lightning wave impact voltage test, and the test voltage is 5kV. After the impulse voltage test, the relay should meet the performance requirements specified in 5.5 to 5.9 of the technical standard. During the inspection, flashover that does not cause insulation damage is allowed. If flashover occurs, the dielectric strength of the insulation should be rechecked, and the dielectric strength test voltage is 75% of the specified value
5.15 Vibration response capability
The relay should be able to withstand the vibration response test of severity level 1 specified in 5.10.4.1 of ZBK45020-90: if there are other special requirements, they shall be specified by the enterprise standard. During the inspection. The delay setting value is the minimum value. When the input excitation is zero and the rated value respectively, the time for the output contact to change the normal state shall not exceed 2$. During the inspection, the relay shall not be subjected to mechanical damage, and its performance shall still meet the requirements of 5.6~5.4 of this standard JB/T37021997. Its delay consistency and average error of the delay setting value shall not exceed 2 times the requirements of the product enterprise standard. 5.16 Ability to withstand vibration for a long time
The relay shall be able to withstand the vibration test of the severity level of "level" specified in 5.10.4.2 of ZBK45020-90. If there are other special requirements, they shall be specified by the enterprise standard. During the test, the relay shall not be excited. After the test, the relay shall not be mechanically damaged, and its performance shall still meet the requirements specified in 5.5~5.7 of this standard. Its delay consistency and average error of delay setting value shall not exceed 2 times the requirements of the product industry standard.
5.17 Ability to withstand shock response
The relay shall be able to withstand the shock response test of the severity level of "level" specified in 5.10.5.1 of ZBK45020-90. If there are other special requirements, they shall be specified by the enterprise standard. During the test, the delay setting value is the minimum value, and the input micro-excitation is respectively When the relay is at zero and rated value, the time for its output contacts to change to normal state shall not exceed 2m. After the inspection, the relay shall not be mechanically damaged, and its performance shall still meet the requirements specified in 5.5~5.7 of this standard. Its delay consistency and average error of delay setting shall not exceed 2 times the requirements of the product enterprise standard. 5.18 Impact durability capability
The relay shall be able to withstand the impact durability test with severity level 1 specified in ZBK45020-90+5.10.5.2. If there are other special requirements, they shall be specified by the enterprise standard. During the inspection, no excitation is applied to the relay. After the inspection, the relay shall not be mechanically damaged, and its performance shall still meet the requirements specified in 5.5~5.7 of this standard. Its delay consistency and average error of delay setting shall not exceed 2 times the requirements of the product enterprise standard.
5.19 'Collision Withstand Capacity
The relay shall be able to withstand the severe collision test of level 1 specified in 5.10.6 of ZBK45020-90. If other special requirements are required, they shall be specified by the enterprise standard: During the inspection, the relay shall not be subjected to excitation, shall not be packaged, and shall not remove any transportation limiter. After the inspection, the relay shall not be subjected to mechanical damage, and its performance shall still meet the requirements specified in 5.5 to 5.7 of this standard. Its delay consistency and the average error of the delay setting value shall not exceed 2 times the requirements specified in the product enterprise standard. 5.20 Heat Resistance
The relay shall be subjected to alternating current test under the conditions of a maximum temperature of 40°C and a test cycle of two cycles (48h). Within 2h before the end of the inspection, the insulation resistance of the parts specified in 5.14.2.1 of this standard shall be measured using a test instrument with an open circuit voltage of 500V. The resistance value should be no less than 4MQ. Determine the dielectric strength of the parts specified in 5.14.2.1 of this standard, and the test voltage is 75% of the specified value. 5.21 Capability to withstand pulse group interference (only for static products) The relay should be able to withstand the test voltage of 1MHz and 100kHz attenuated oscillation waves, the first half-wave voltage amplitude is 2.5kV common mode, and the differential mode is 1kV. The applied excitation is the rated value, and the average error of the product delay setting value does not exceed ±20% of the setting value. 5.22 Capability to withstand electrostatic discharge interference (only for static products) The relay should be able to withstand the electrostatic discharge interference test of the severity level 1 specified in 4.1 of 2BK45032-90. During the test, the relay delay setting value is the minimum value: the input excitation applied by the product is the fixed value, and the average error of the product delay setting value does not exceed ±20% of the setting value.
5.23 Ability to withstand electromagnetic interference (for static products) The relay should be able to withstand electromagnetic interference of grade I in the GB/T14593.9 standard. The applied excitation is the rated value, and the average error of the delay setting value does not exceed ±20% of the setting value. S. 24 Melting point performance
5.24.1 Contact breaking capacity
The contacts of the relay output circuit should be able to disconnect the voltage not greater than 250V, the time band is 5ma±0.75mB or 40ms±6ms, and the AC circuit with a voltage greater than 25V (power factor 0% is 0.4±0.1). The breaking capacity of the contacts and the maximum current allowed to be disconnected should be selected according to the values listed in Table 3. If there are other special requirements, they shall be specified by the enterprise standards. 5.24.2 The long-term allowable closing current of the contact The long-term allowable closing current of the contact of the relay output circuit should be selected according to the values listed in Table 3. If there are other special requirements, they shall be specified by the enterprise standard.
Melting point category
JB/T37021997
H3 Long-term allowable closing current of the contact
Rated breaking capacity
5.24.3 Overload capacity of contacts
Maximum current allowed to be disconnected
The contacts should be able to reliably close and disconnect 1.5 times the rated disconnection capacity for 10 times without continuous arc. 5.24.4 Electrical life
Long-term allowable closing current
The relay contacts should be able to reliably operate and return to the circuit load specified in 5.24.1 of this standard. The number of times can generally be selected from the following numbers: 5×10, 1℃**5×10%, and the inspection compliance rate is specified by the enterprise standard and is selected from the following values: 30, 60: 120: 360: 720, 1800 times/h. The load ratio is specified by the enterprise standard. After the inspection, the relay shall not be mechanically damaged and shall still meet the requirements of 5.5~5.7 of this standard. It shall be able to withstand 75% of the test voltage specified in 5.14.2 of this standard without insulation breakdown and flashover. The average error of its delay consistency and delay setting value shall not exceed 1.5 times the value specified in the product enterprise standard.
5.25 Mechanical life
The relay box output contacts shall not be connected to the load and shall be able to reliably operate and return. The efficiency shall be selected from the following values: 5×10, 10, 5×10%; 10°, and the inspection rate shall be specified by the industry standard: and selected from the following values: 30, 60; 120; 36C: 720, 1800; 3600 times/h. After the inspection, the relay shall not be mechanically damaged and shall still meet the requirements specified in 5.5~5.7 of this standard, and can withstand 75% of the inspection voltage value specified in 5.14.2 of this standard, without insulation breakdown and flashover, and the average error of its delay consistency and delay setting value shall not exceed 2 times the value specified in the product enterprise standard.
5.26 Structural and appearance requirements
5. 26.1 The relay shall have a shell with an expansion protection, and the protection level shall meet the relevant requirements of JB/T 7102. The action indicator or setting value shall be observed without opening the cover.
5.26.2 The electrical clearance between the relay lead terminals shall not be less than 4mm, and the creepage distance shall not be less than 6mm. 5.26.3 The relay shall have a lead seal, and the cover can only be opened for adjustment or setting after the lead seal is opened. 5.26.4 The metal parts of the relay shall be treated with anti-corrosion and free of rust. The insulating parts should be intact, smooth, without cracks or defects. The materials used should not cause rust on other parts and affect the contact performance of the contacts. 5.26.5 The relay delay setting disk should have a scale indication, which can be locked after setting. The relay with an action indicator should be able to accurately indicate the action state and the reset state, and after the action, it can be reset without opening the shell. 5.26.6 The mechanical and electrical connections of each part of the relay should be firm, correct and reliable: there should be no looseness. When the product is adjusted and shipped out of the factory, the relevant static positions should be sealed with paint.
5.26.7 All welding points of the relay should be firm and reliable, without cold welding. The welding points should be cleaned and no corrosion is allowed to the connected parts and components.
5.26.8 The plug-in of the relay should ensure universality and interchangeability, the connector part should have reliable contact, easy plug-in and pull-out, and the plug-in should have a locking mechanism. When the plug is inserted or removed, there should be no collision or jamming of components or wires with the housing. 5.26,9 The wires connecting the internal relay wires to the terminals should be lowered to protect them from oxidation. When the current circuit is crimped with screws, fasteners such as washers and spring washers should be added: When the voltage circuit is crimped with screws, welding pieces should be added to prevent breakage. 5.26.10 The electronic components used in the relay should meet the requirements of the corresponding technical standards. 5.26.11 The internal insulation of the relay coil is not allowed to use materials that are easy to absorb moisture, such as yellow varnished cloth or yellow wax net. 5.26.12 The installation dimensions of relays of the same model should be unified. 6
乔挑检验方法
JB/T37021997
61 The inspection conditions of the relay shall be in accordance with the relevant provisions of Chapter 3 of GB/T7261-87. 6.2 The structure and appearance inspection of 5.26 of this standard shall be carried out in accordance with the relevant provisions of Chapter 4 of GB/T7261-87. 6.3 When testing the extreme alarm value of the extreme range of ambient temperature in 5.4 of this standard, it shall be carried out in accordance with the provisions of Method 2 in Chapter 22 of GB/T7261-87.
6.4 When testing the action value of 5.5 and the return value of 5.6 of this standard, it shall be carried out in accordance with the method specified in Chapter 7 of GB/T7261-87. The qualified criterion is:
a) The action and return are judged by whether the instantaneous contact has a sheath coming out. When there is output, it is in the action state, and when there is no output, it is in the return state. For relays without condensing contacts, the minimum delay time shall be considered: b) During the five (ten times for electromechanical type) action cycle inspections, if one of them appears below the specified value and the specified function is not completed, it shall be judged as unqualified.
6.5 When testing the delay setting range of 5.7 of this standard, it shall be carried out in accordance with the following methods. 6.5.1 Test conditions: reference conditions (according to the provisions of 3.1.2 and 3.2.2 of GB/T7261-87). 6.5.2 Test circuit: connect according to Figure 1 or Figure 2. W
Power switch
Audio frequency generator
Relay
81—Small switch
t—Time tester
pY—DC voltmeter 0.5 level
Figure 1 Electric stopwatch test
s—Power switch
pVDC voltmeter GE level
pt—Room tester
Sl—Small push button switch
Figure 2 Digital time test
6.5.3 Delay setting time, the delay setting value is the minimum position. Analysis, 5. Adjust the excitation quantity to the rated voltage and measure the maximum action time by the method of sinus overload. 6, 5.5 Measure and record five times and calculate the average value.
JB/T37021997
6.5.6 Delay setting time, delay time setting value is the maximum position. 6. 5. 7 Repeat 6. 5. 4~6. 5. 5. 5. 5. 6. 8 The qualified judgment skirt is:
The average value of the relay action time should not exceed the action time setting value (additional specified setting error). 6.6 When testing the consistency of action delay in 5.8 and the average error of delay setting value in 5.9 of this standard, proceed according to the following method. 6.6.1 Test conditions; reference conditions.
6.6.2 Test the circuit and connect according to Figure 1 or Figure 2. 6.6.3 Setting action time
a) Relays without scale setting values can be set to any position; b) Relays with scale setting values can be set to any scale value within the allowable range; c) For relays set by percentage, each setting hole should appear at least once, such as setting at 100%, 80%, 50%, 25%, 12.5%, 10%, etc.
6.6.4 Adjust the excitation amount to the rated voltage, and use the method of suddenly cutting the excitation amount to measure the action time. Measure five times, determine the maximum and minimum values of the measurement, and calculate the average value (electromechanical relays should be measured ten times). 6.6.6 Qualification criteria: During the inspection process, any of the following situations will be considered unqualified. 6.6.6.1 The average error and delay consistency of the action time exceed the requirements specified in this standard. 6.6.6.2 Electromechanical relays shall also be judged as unqualified if the following phenomena occur: a) The time mechanism is stuck and the moving contact is not closed; b) The moving contact stops or suddenly stops during the starting process; d) The moving contact is in the sliding process. 6.7 When testing the power consumption of 5.10 of this standard, the method specified in Chapter 10 of GB/T7261-871 shall be followed. 6.8 When testing the effect of ambient temperature changes on performance in 5.11 of this standard, the method specified in Chapters 12 and 13 of CB/T7261-87 shall be followed.
6.9 When testing the effect of changes in the auxiliary excitation quantity on performance in 5.12 of this standard, the method specified in Chapter 7 of GB/T7261-87 shall be followed. 6.10 When testing the thermal performance (temperature rise) of 5.13 of this standard: the method specified in Chapter 11 of GB/T7261-87 shall be followed. When testing the insulation resistance in 5.14.1 of this standard: follow the method specified in 20.4.2 of GB/T7261-87. 6.
When testing the dielectric strength in 5.14.2 of this standard: follow the method specified in 20.1.1 of GB/T7261-87. 6.13
When testing the impulse voltage in 5.14.3 of this standard: follow the method specified in 20.1.3 of GB/T7261-87. When testing the vibration response energy in 5.15 of this standard: follow the method specified in 16.2 of GB/T7261-87. 6.14
When testing the vibration endurance in 5.16 of this standard: follow the method specified in 16.3 of GB/T7261-87. 6.15
6.16When testing the vibration endurance in 5.16 of this standard: follow the method specified in 16.3 of GB/T7261-87.17 When testing the impact response capability of this standard, the method specified in 17.4 of GB/T7261-87 shall be followed. 6.17
When testing the impact endurance capability of this standard 5.18, the method specified in 17.5 of GB/T7261-87 shall be followed. 6.18
When testing the heat resistance of this standard 5.20, the method specified in Chapter 21 of GB/T7261-87 shall be followed. 6.19
6.20 When testing the pulse group interference capability of this standard 5.21, the method specified in GB/T6162 shall be followed. When testing the ability to withstand electrostatic discharge interference in 5.22 of this standard, the method specified in ZBK45032 shall be followed. 6.21
When testing the ability to withstand radiated electromagnetic field interference in 5.23 of this standard, the method specified in GB/T14598.9 shall be followed. 6.22
When testing the contact performance in 5.24 of this standard, the method specified in Chapter 24 of GB/T7261-87 shall be followed. 6.23
6.24When testing the mechanical life in 5.25 of this standard: the method specified in Chapter 25 of GB/T7261-87 shall be followed. Inspection rules
The inspection of relay static electricity is divided into three categories: factory inspection, finalization inspection and regular inspection. Each relay shall be inspected and can only be shipped after being confirmed as qualified by the quality inspection department. It shall have a product factory certificate proving that the relay is qualified.
JB/T37021997
7.3 Inspection items are Japanese standards 5.5~~5.9, 5.14.2 and 5.26.7.4 When evaluating new products during trial production: final inspection should be carried out. 7.5 In one of the following situations, regular inspection should be carried out: a) After the production of the first batch, if there are major changes in materials and processes, which may affect the performance of the device; h) During normal production, regular inspection should be carried out: every 4 years is a cycle; c) When the relay is discontinued for more than 2 years and resumed. 7.6 The regular inspection items of the relay are 5.4~~5.14, 5.20~5.26 of this standard. 7.7 The final inspection items of the relay are all the contents of 4.4, 4.5, 5.4~5.26 of this standard. Final inspection is not grouped. 7.8 Conduct regular inspections. Among the relays that pass the factory inspection, six units are sampled for the first time and eight units are sampled for the second time. The final inspection is for one unit.
7.9 Conduct regular inspections of relays. After the sampled samples pass the factory inspection, they are divided into two groups for inspection according to the following grouping principles. Each group has one unit:
Group A continues to conduct 5.4 (limit value of extreme range of ambient temperature), 5.10 (power consumption), 5.11 (effect of ambient temperature change on performance), 5.13 (thermal performance, temperature rise), 5.14.1 (insulation resistance), 5.14.3 (rush voltage) and 5.21 (contact performance) of this standard. Group B continues with 5.12 (the impact of changes in excitation on performance), 5.20 (moisture and heat resistance), 5.21 (ability to withstand pulse interference), 5.22 (ability to withstand electrostatic discharge), 5.23 (ability to withstand radiated electromagnetic field interference) and 5.25 (machine life). 7.10 Classification of defective items during product inspection: =) Class fatal defects: Specific items are: 5.8 (consistency of action delay), 5.11~5.15 (the impact of changes in ambient humidity on performance, the impact of changes in excitation on performance, thermal performance, insulation performance, ability to withstand dynamic response), 5.17 (ability to withstand impulse response), 5.21~-5.24 (moisture and heat resistance. Ability to withstand pulse group interference, ability to withstand electrostatic discharge interference, ability to withstand radiated electromagnetic field interference, contact performance), 5.26 .2 (Requirements for electrical room and creepage distance) L) Category II is a major defect, and its main items are: 5.1~5.7 (limit value of the range of ambient temperature exhaustion, action straightness, return value, delay setting range), 5.9 (average error of delay setting value, 5.10 power consumption), 5.16 (endurance to vibration), 5.18 (endurance to impact), 5.19 (endurance to collision), 5.25 (core life), 5.26.11~5.26.12 (internal insulation and external dimensions requirements). e) Category III is general defects, and its main items are: 5.26.1 (housing protection), 5.26.3 (sealing facilities), 5.26.4 (appearance requirements for metal parts), 5.26.5 (scale indication), 5.26.6 (mechanical connection and electrical connection requirements), 5.26.7~5.26.10 (appearance requirements or electrical requirements). 7.11 Criteria for qualified products in periodic inspections a) Category 1 fatal defects: During periodic inspections, no fatal defects are allowed. If any are found, the product is deemed unqualified. b) Category 2 major defects: During periodic inspections: If no more than one major defect is found, the product is deemed qualified; if 2-3 major defects are found, a second sampling will be conducted. If no more than one major defect is found in the inspection, the product is deemed qualified. If more than one major defect is found in the second sampling, the product is deemed unqualified. If more than three major defects are found, the product is deemed unqualified without a second sampling.
c) Three types of general defects: During regular inspection, if the number of general defects is equal to or less than four, the product is judged to be qualified; if the number of general defects is greater than four, a second sampling is conducted. If the number of general defects is equal to or less than four, the product is judged to be qualified: if the number of general defects is still greater than four, the product is judged to be unqualified;) During regular inspection, if one major defect and no more than two general defects are found, the product can be judged to be qualified. If one major defect and more than two general defects are found, a second sampling is conducted. If one major defect and no more than two general defects are found in the second sampling, the product is judged to be qualified. If one major defect and more than one general defect are still found, the product is judged to be unqualified. 8 Marking, packaging, transportation, storage
81 Each relay should have a nameplate or a mark that serves as a nameplate, including a) the manufacturer's name and trademark (when the product nameplate size is too small, only the trademark is allowed) 9
JB/T3702
b) the relay model and name (when the product nameplate size is too small, only the product model is allowed); c) the rated value of the relay:
d) the setting range of the relay
e) the year, month and serial number of the relay.
8.2 The relay should have a mark showing the rear terminal diagram. 6.3 The coil code and relevant parameters (rated value, resistance value, etc.) should be marked on the coil of the relay. 8.4 The text symbols of internal relays, electronic components, etc. should be marked near the components. The markings should be clear, durable and easy to observe. 8.5 The following requirements should be followed when packing relays: a) The relays should be wrapped with waterproof paper or plastic products, padded with shock-proof materials on all sides, and placed in the packaging box: The accessories specified in this standard and the packaging technical conditions should be placed in the box, and the box should be sealed tightly. c) The relay model and specifications should be marked on the box. 8.6 The packed relays should be placed in a dry and firm outer packaging box. The box must have moisture-proof and heat-reducing measures, and be resistant to mechanical vibration and impact to ensure that the circuit breaker can be protected from damage during transportation, and can also prevent the invasion of books and snow, in accordance with the requirements of JB/T7828.
8.7 The outer packaging box should be marked with the following paint that is not easy to fade: a) Name of the shipping factory:
b) Name and address of the loan collection unit:
c) Goods model:
Date of shipment:
e) Box body size;
{) Box body length, width and height dimensions
g) The outer wall of the box should be marked with "Upward", "Be careful to roll" and "Avoid moisture". 8.8 The weight of a box containing relays should not exceed 40kg8.9 The packaged relays should be stored in a snow-proof room with a relative humidity of no more than 80% and the surrounding air free of acidic, alkaline or other corrosive and explosive gases.
8.10 The relay should have the implementation standard code and number (the year number may not be written) on its product manual, quality certification documents and packaging. 9 Others
.1. The following items are supplied together with the relay: a) a product certificate issued by the quality inspection department; 6) a product instruction manual with wiring diagram and electrical diagram; c) installation accessories supplied in the specified quantity; d) spare parts and accessories supplied in the quantity and variety specified in the contract according to the user's requirements. 9.2: Certificate period
If the user fully complies with the transportation, storage, installation and use rules specified in this standard and the product instruction manual, the manufacturer shall be responsible for replacement or repair within one year from the date the relay leaves the factory. 1018 When the impact endurance is tested, the method specified in 17.5 of GB/T7261-87 shall be followed. 6.17
When testing 5.19 of this standard for collision resistance, the method specified in Chapter 18 of GB/T7261-87 shall be followed. 6.18
When testing 5.20 of this standard for heat resistance, the method specified in Chapter 21 of GB/T7261-87 shall be followed. 6.19
6.20 When testing 5.21 of this standard for pulse group interference resistance, the method specified in GB/T6162 shall be followed. When testing 5.22 of this standard for electrostatic discharge interference resistance, the method specified in ZBK45032 shall be followed. 6.21
When testing 5.23 of this standard for radiated electromagnetic field interference resistance, the method specified in GB/T14598.9 shall be followed. 6.22
When testing the contact performance of 5.24 of this standard, the method specified in Chapter 24 of GB/T7261-87 shall be followed. 6.23
6.24When testing the mechanical life of 5.25 of this standard: the method specified in Chapter 25 of GB/T7261-87 shall be followed. Inspection rules
The inspection of relays is divided into three categories: factory inspection, type inspection and periodic inspection. Each relay shall be inspected and can only be shipped after being confirmed as qualified by the quality inspection department. It shall have a product factory certificate proving that the relay is qualified.
JB/T37021997
7.3 Inspection Japanese standards 5.5~~5.9, 5.14.2 and 5.26.7.4When evaluating the trial production of new products: type inspection shall be carried out. 7.5 Periodic inspections shall be conducted in any of the following situations: a) After production, if there are major changes in materials and processes that may affect the performance of the relay; h) During normal production, periodic inspections shall be conducted: Every 4 years is a cycle; c) When the relay is discontinued for more than 2 years and then resumed. 7.6 The periodic inspection items of relays are 5.4~5.14 and 5.20~5.26 of this standard. 7.7 The final inspection items of relays are all the contents of 4.4, 4.5, 5.4~5.26 of this standard. Final inspections are not grouped. 7.8 Periodic inspections shall be conducted. Among the relays that have passed the factory inspection, six units shall be sampled for the first time and eight units for the second time. Final inspections shall be conducted on 100 units.
7.9 Relays are inspected regularly. After the samples are inspected and qualified according to the inspection items, they are divided into two groups for inspection according to the following grouping principles. Each group is:
Group A continues to carry out 5.4 (limit value of extreme range of ambient temperature), 5.10 (power consumption), 5.11 (effect of ambient temperature change on performance), 5.13 (thermal performance, temperature rise), 5.14.1 (insulation resistance), 5.14.3 (rush voltage) and 5.21 (contact performance) of this standard. Group B continues to carry out 5.12 (effect of excitation change on performance), 5.20 (humidity and heat resistance), 5.21 (pulse interference resistance), 5.22 (static discharge resistance), 5.23 (radiated electromagnetic field resistance) and 5.25 (machine life) of this standard. 7.10 Classification of defective items during product inspection: =) Class fatal defects: Specific items are: 5.8 (consistency of action delay), 5.11~5.15 (impact of environmental humidity changes on performance, impact of excitation changes on performance, thermal performance, insulation performance, ability to withstand excavation response), 5.17 (ability to withstand impulse response), 5.21~-5.24 (resistance to moisture and heat. Ability to withstand pulse group interference, ability to withstand electrostatic discharge interference, ability to withstand ejected magnetic field interference, contact performance), 5.26 .2 (Requirements for electrical room and creepage distance) L) Category II is a major defect, and its main items are: 5.1~5.7 (limit value of the range of ambient temperature exhaustion, action straightness, return value, delay setting range), 5.9 (average error of delay setting value, 5.10 power consumption), 5.16 (endurance to vibration), 5.18 (endurance to impact), 5.19 (endurance to collision), 5.25 (core life), 5.26.11~5.26.12 (internal insulation and external dimensions requirements). e) Category III is general defects, and its main items are: 5.26.1 (housing protection), 5.26.3 (sealing facilities), 5.26.4 (appearance requirements for metal parts), 5.26.5 (scale indication), 5.26.6 (mechanical connection and electrical connection requirements), 5.26.7~5.26.10 (appearance requirements or electrical requirements). 7.11 Criteria for qualified products in periodic inspections a) Category 1 fatal defects: During periodic inspections, no fatal defects are allowed. If any are found, the product is deemed unqualified. b) Category 2 major defects: During periodic inspections: If no more than one major defect is found, the product is deemed qualified; if 2-3 major defects are found, a second sampling will be conducted. If no more than one major defect is found in the inspection, the product is deemed qualified. If more than one major defect is found in the second sampling, the product is deemed unqualified. If more than three major defects are found, the product is deemed unqualified without a second sampling.
c) Three types of general defects: During regular inspection, if the number of general defects is equal to or less than four, the product is judged to be qualified; if the number of general defects is greater than four, a second sampling is conducted. If the number of general defects is equal to or less than four, the product is judged to be qualified: if the number of general defects is still greater than four, the product is judged to be unqualified;) During regular inspection, if one major defect and no more than two general defects are found, the product can be judged to be qualified. If one major defect and more than two general defects are found, a second sampling is conducted. If one major defect and no more than two general defects are found in the second sampling, the product is judged to be qualified. If one major defect and more than one general defect are still found, the product is judged to be unqualified. 8 Marking, packaging, transportation, storage
81 Each relay should have a nameplate or a mark that serves as a nameplate, including a) the manufacturer's name and trademark (when the product nameplate size is too small, only the trademark is allowed) 9
JB/T3702
b) the relay model and name (when the product nameplate size is too small, only the product model is allowed); c) the rated value of the relay:
d) the setting range of the relay
e) the year, month and serial number of the relay.
8.2 The relay should have a mark showing the rear terminal diagram. 6.3 The coil code and relevant parameters (rated value, resistance value, etc.) should be marked on the coil of the relay. 8.4 The text symbols of internal relays, electronic components, etc. should be marked near the components. The markings should be clear, durable and easy to observe. 8.5 The following requirements should be followed when packing relays: a) The relays should be wrapped with waterproof paper or plastic products, padded with shockproof materials on all sides, and placed in the packaging box: the accessories specified in this standard and the packaging technical conditions should be placed in the box, and the box should be sealed tightly. c) The relay model and specifications should be marked on the box. 8.6 The packed relays should be placed in a dry and firm outer packaging box. The box must have moisture-proof and heat-reducing measures, and be resistant to mechanical vibration and impact to ensure that the circuit breaker can be protected from damage during transportation, and can also prevent the invasion of books and snow, in accordance with the requirements of JB/T7828.
8.7 The outer packaging box should be marked with the following paint that is not easy to fade: a) Name of the shipping factory:
b) Name and address of the loan collection unit:
c) Goods model:
Date of shipment:
e) Box body size;
{) Box body length, width and height dimensions
g) The outer wall of the box should be marked with "Upward", "Be careful to roll" and "Avoid moisture". 8.8 The weight of a box containing relays should not exceed 40kg8.9 The packaged relays should be stored in a snow-proof room with a relative humidity of no more than 80% and the surrounding air free of acidic, alkaline or other corrosive and explosive gases.
8.10 The relay should have the implementation standard code and number (the year number may not be written) on its product manual, quality certification documents and packaging. 9 Others
.1. The following items are supplied together with the relay: a) a product certificate issued by the quality inspection department; 6) a product instruction manual with wiring diagram and electrical diagram; c) installation accessories supplied in the specified quantity; d) spare parts and accessories supplied in the quantity and variety specified in the contract according to the user's requirements. 9.2: Certificate period
If the user fully complies with the transportation, storage, installation and use rules specified in this standard and the product instruction manual, the manufacturer shall be responsible for replacement or repair within one year from the date the relay leaves the factory. 1018 When the impact endurance is tested, the method specified in 17.5 of GB/T7261-87 shall be followed. 6.17
When testing 5.19 of this standard for collision resistance, the method specified in Chapter 18 of GB/T7261-87 shall be followed. 6.18
When testing 5.20 of this standard for heat resistance, the method specified in Chapter 21 of GB/T7261-87 shall be followed. 6.19
6.20 When testing 5.21 of this standard for pulse group interference resistance, the method specified in GB/T6162 shall be followed. When testing 5.22 of this standard for electrostatic discharge interference resistance, the method specified in ZBK45032 shall be followed. 6.21
When testing 5.23 of this standard for radiated electromagnetic field interference resistance, the method specified in GB/T14598.9 shall be followed. 6.22
When testing the contact performance of 5.24 of this standard, the method specified in Chapter 24 of GB/T7261-87 shall be followed. 6.23
6.24When testing the mechanical life of 5.25 of this standard: the method specified in Chapter 25 of GB/T7261-87 shall be followed. Inspection rules
The inspection of relays is divided into three categories: factory inspection, type inspection and periodic inspection. Each relay shall be inspected and can only be shipped after being confirmed as qualified by the quality inspection department. It shall have a product factory certificate proving that the relay is qualified.
JB/T37021997
7.3 Inspection Japanese standards 5.5~~5.9, 5.14.2 and 5.26.7.4When evaluating the trial production of new products: type inspection shall be carried out. 7.5 Periodic inspections shall be conducted in any of the following situations: a) After production, if there are major changes in materials and processes that may affect the performance of the relay; h) During normal production, periodic inspections shall be conducted: Every 4 years is a cycle; c) When the relay is discontinued for more than 2 years and then resumed. 7.6 The periodic inspection items of relays are 5.4~5.14 and 5.20~5.26 of this standard. 7.7 The final inspection items of relays are all the contents of 4.4, 4.5, 5.4~5.26 of this standard. Final inspections are not grouped. 7.8 Periodic inspections shall be conducted. Among the relays that have passed the factory inspection, six units shall be sampled for the first time and eight units for the second time. Final inspections shall be conducted on 100 units.
7.9 Relays are inspected regularly. After the samples are inspected and qualified according to the inspection items, they are divided into two groups for inspection according to the following grouping principles. Each group is:
Group A continues to carry out 5.4 (limit value of extreme range of ambient temperature), 5.10 (power consumption), 5.11 (effect of ambient temperature change on performance), 5.13 (thermal performance, temperature rise), 5.14.1 (insulation resistance), 5.14.3 (rush voltage) and 5.21 (contact performance) of this standard. Group B continues to carry out 5.12 (effect of excitation change on performance), 5.20 (humidity and heat resistance), 5.21 (pulse interference resistance), 5.22 (static discharge resistance), 5.23 (radiated electromagnetic field resistance) and 5.25 (machine life) of this standard. 7.10 Classification of defective items during product inspection: =) Class fatal defects: Specific items are: 5.8 (consistency of action delay), 5.11~5.15 (impact of environmental humidity changes on performance, impact of excitation changes on performance, thermal performance, insulation performance, ability to withstand excavation response), 5.17 (ability to withstand impulse response), 5.21~-5.24 (resistance to moisture and heat. Ability to withstand pulse group interference, ability to withstand electrostatic discharge interference, ability to withstand ejected magnetic field interference, contact performance), 5.26 .2 (Requirements for electrical room and creepage distance) L) Category II is a major defect, and its main items are: 5.1~5.7 (limit value of the range of ambient temperature exhaustion, action straightness, return value, delay setting range), 5.9 (average error of delay setting value, 5.10 power consumption), 5.16 (endurance to vibration), 5.18 (endurance to impact), 5.19 (endurance to collision), 5.25 (core life), 5.26.11~5.26.12 (internal insulation and external dimensions requirements). e) Category III is general defects, and its main items are: 5.26.1 (housing protection), 5.26.3 (sealing facilities), 5.26.4 (appearance requirements for metal parts), 5.26.5 (scale indication), 5.26.6 (mechanical connection and electrical connection requirements), 5.26.7~5.26.10 (appearance requirements or electrical requirements). 7.11 Criteria for qualified products in periodic inspections a) Category 1 fatal defects: During periodic inspections, no fatal defects are allowed. If any are found, the product is deemed unqualified. b) Category 2 major defects: During periodic inspections: If no more than one major defect is found, the product is deemed qualified; if 2-3 major defects are found, a second sampling will be conducted. If no more than one major defect is found in the inspection, the product is deemed qualified. If more than one major defect is found in the second sampling, the product is deemed unqualified. If more than three major defects are found, the product is deemed unqualified without a second sampling.
c) Three types of general defects: During regular inspection, if the number of general defects is equal to or less than four, the product is judged to be qualified; if the number of general defects is greater than four, a second sampling is conducted. If the number of general defects is equal to or less than four, the product is judged to be qualified: if the number of general defects is still greater than four, the product is judged to be unqualified;) During regular inspection, if one major defect and no more than two general defects are found, the product can be judged to be qualified. If one major defect and more than two general defects are found, a second sampling is conducted. If one major defect and no more than two general defects are found in the second sampling, the product is judged to be qualified. If one major defect and more than one general defect are still found, the product is judged to be unqualified. 8 Marking, packaging, transportation, storage
81 Each relay should have a nameplate or a mark that serves as a nameplate, including a) the manufacturer's name and trademark (when the product nameplate size is too small, only the trademark is allowed) 9 bzxz.net
JB/T3702
b) the relay model and name (when the product nameplate size is too small, only the product model is allowed); c) the rated value of the relay:
d) the setting range of the relay
e) the year, month and serial number of the relay.
8.2 The relay should have a mark showing the rear terminal diagram. 6.3 The coil code and relevant parameters (rated value, resistance value, etc.) should be marked on the coil of the relay. 8.4 The text symbols of internal relays, electronic components, etc. should be marked near the components. The markings should be clear, durable and easy to observe. 8.5 The following requirements should be followed when packing relays: a) The relays should be wrapped with waterproof paper or plastic products, padded with shockproof materials on all sides, and placed in the packaging box: the accessories specified in this standard and the packaging technical conditions should be placed in the box, and the box should be sealed tightly. c) The relay model and specifications should be marked on the box. 8.6 The packed relays should be placed in a dry and firm outer packaging box. The box must have moisture-proof and heat-reducing measures, and be resistant to mechanical vibration and impact to ensure that the circuit breaker can be protected from damage during transportation, and can also prevent the invasion of books and snow, in accordance with the requirements of JB/T7828.
8.7 The outer packaging box should be marked with the following paint that is not easy to fade: a) Name of the shipping factory:
b) Name and address of the loan collection unit:
c) Goods model:
Date of shipment:
e) Box body size;
{) Box body length, width and height dimensions
g) The outer wall of the box should be marked with "Upward", "Be careful to roll" and "Avoid moisture". 8.8 The weight of a box containing relays should not exceed 40kg8.9 The packaged relays should be stored in a snow-proof room with a relative humidity of no more than 80% and the surrounding air free of acidic, alkaline or other corrosive and explosive gases.
8.10 The relay should have the implementation standard code and number (the year number may not be written) on its product manual, quality certification documents and packaging. 9 Others
.1. The following items are supplied together with the relay: a) a product certificate issued by the quality inspection department; 6) a product instruction manual with wiring diagram and electrical diagram; c) installation accessories supplied in the specified quantity; d) spare parts and accessories supplied in the quantity and variety specified in the contract according to the user's requirements. 9.2: Certificate period
If the user fully complies with the transportation, storage, installation and use rules specified in this standard and the product instruction manual, the manufacturer shall be responsible for replacement or repair within one year from the date the relay leaves the factory. 1019 When testing the collision resistance of 5.20 of this standard, the method specified in Chapter 18 of GB/T7261-87 shall be followed. 6.18
When testing the heat resistance of 5.20 of this standard, the method specified in Chapter 21 of GB/T7261-87 shall be followed. 6.19
6.20 When testing the pulse group interference resistance of 5.21 of this standard, the method specified in GB/T6162 shall be followed. When testing the electrostatic discharge interference resistance of 5.22 of this standard, the method specified in ZBK45032 shall be followed. 6.21
When testing the radiated electromagnetic field interference resistance of 5.23 of this standard, the method specified in GB/T14598.9 shall be followed. 6.22
When testing the contact performance of 5.24 of this standard, the method specified in Chapter 24 of GB/T7261-87 shall be followed. 6.23
6.24 When testing the mechanical life of this standard 5.25: follow the method specified in Chapter 25 of GB/T7261--87. Inspection rules
Relay static inspection is divided into three categories: factory inspection, type inspection and periodic inspection. Each relay shall be inspected! Each relay shall be inspected and can only be shipped after being confirmed as qualified by the quality inspection department. It shall have a product factory certificate proving that the relay is qualified.
JB/T37021997
7.3 Inspection Japanese standards 5.5~~5.9, 5.14.2 and 5.26.7.4 When evaluating the trial production of new products: type inspection shall be carried out. 7.5 Periodic inspections shall be conducted in any of the following situations: a) After production, if there are major changes in materials and processes that may affect the performance of the relay; h) During normal production, periodic inspections shall be conducted: Every 4 years is a cycle; c) When the relay is discontinued for more than 2 years and then resumed. 7.6 The periodic inspection items of relays are 5.4~5.14 and 5.20~5.26 of this standard. 7.7 The final inspection items of relays are all the contents of 4.4, 4.5, 5.4~5.26 of this standard. Final inspections are not grouped. 7.8 Periodic inspections shall be conducted. Among the relays that have passed the factory inspection, six units shall be sampled for the first time and eight units for the second time. Final inspections shall be conducted on 100 units.
7.9 Relays are inspected regularly. After the samples are inspected and qualified according to the inspection items, they are divided into two groups for inspection according to the following grouping principles. Each group is:
Group A continues to carry out 5.4 (limit value of extreme range of ambient temperature), 5.10 (power consumption), 5.11 (effect of ambient temperature change on performance), 5.13 (thermal performance, temperature rise), 5.14.1 (insulation resistance), 5.14.3 (rush voltage) and 5.21 (contact performance) of this standard. Group B continues to carry out 5.12 (effect of excitation change on performance), 5.20 (humidity and heat resistance), 5.21 (pulse interference resistance), 5.22 (static discharge resistance), 5.23 (radiated electromagnetic field resistance) and 5.25 (machine life) of this standard. 7.10 Classification of defective items during product inspection: =) Class fatal defects: Specific items are: 5.8 (consistency of action delay), 5.11~5.15 (impact of environmental humidity changes on performance, impact of excitation changes on performance, thermal performance, insulation performance, ability to withstand excavation response), 5.17 (ability to withstand impulse response), 5.21~-5.24 (resistance to moisture and heat. Ability to withstand pulse group interference, ability to withstand electrostatic discharge interference, ability to withstand ejected magnetic field interference, contact performance), 5.26 .2 (Requirements for electrical room and creepage distance) L) Category II is a major defect, and its main items are: 5.1~5.7 (limit value of the range of ambient temperature exhaustion, action straightness, return value, delay setting range), 5.9 (average error of delay setting value, 5.10 power consumption), 5.16 (endurance to vibration), 5.18 (endurance to impact), 5.19 (endurance to collision), 5.25 (core life), 5.26.11~5.26.12 (internal insulation and external dimensions requirements). e) Category III is general defects, and its main items are: 5.26.1 (housing protection), 5.26.3 (sealing facilities), 5.26.4 (appearance requirements for metal parts), 5.26.5 (scale indication), 5.26.6 (mechanical connection and electrical connection requirements), 5.26.7~5.26.10 (appearance requirements or electrical requirements). 7.11 Criteria for qualified products in periodic inspections a) Category 1 fatal defects: During periodic inspections, no fatal defects are allowed. If any are found, the product is deemed unqualified. b) Category 2 major defects: During periodic inspections: If no more than one major defect is found, the product is deemed qualified; if 2-3 major defects are found, a second sampling will be conducted. If no more than one major defect is found in the inspection, the product is deemed qualified. If more than one major defect is found in the second sampling, the product is deemed unqualified. If more than three major defects are found, the product is deemed unqualified without a second sampling.
c) Three types of general defects: During regular inspection, if the number of general defects is equal to or less than four, the product is judged to be qualified; if the number of general defects is greater than four, a second sampling is conducted. If the number of general defects is equal to or less than four, the product is judged to be qualified: if the number of general defects is still greater than four, the product is judged to be unqualified;) During regular inspection, if one major defect and no more than two general defects are found, the product can be judged to be qualified. If one major defect and more than two general defects are found, a second sampling is conducted. If one major defect and no more than two general defects are found in the second sampling, the product is judged to be qualified. If one major defect and more than one general defect are still found, the product is judged to be unqualified. 8 Marking, packaging, transportation, storage
81 Each relay should have a nameplate or a mark that serves as a nameplate, including a) the manufacturer's name and trademark (when the product nameplate size is too small, only the trademark is allowed) 9
JB/T3702
b) the relay model and name (when the product nameplate size is too small, only the product model is allowed); c) the rated value of the relay:
d) the setting range of the relay
e) the year, month and serial number of the relay.
8.2 The relay should have a mark showing the rear terminal diagram. 6.3 The coil code and relevant parameters (rated value, resistance valu
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