Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T3310
1996-04-11
1996-10-01
JB/T33101996
JB331089
This standard specifies the technical requirements, inspection methods, inspection rules, marking, packaging, transportation, storage and other requirements of power directional relays.
This standard applies to power directional relays with two input excitation quantities (hereinafter referred to as relays). The relay is used in the secondary circuit of the power system as a power directional element. This standard serves as the basis for the design, production and use of relays. This standard does not apply to relays with negative sequence power and input excitation quantities of two currents or voltages. This standard only applies to newly manufactured relays. 2 Reference standards
GE/T 2900.1—92
GB 2900. 17-83
GB 7261-87
ZB K33 001-88
ZB K45 020-90
ZB K45 032-90
JB/T 7105-S3
JB/T 7828-$5
3 Terminology
Electrical terminology Basic terminology
Electrical terminology Relays and relay protection devices Basic test methods for relays and relay protection devices Test procedures and test methods for power direction relays Technical conditions for power system protection and automatic relays and devices General technical conditions for measuring relays and protection devices Electrostatic discharge interference test for 35kV substation (station) complete set of centralized control protection panels, cabinets, and units General technical conditions for relays and their devices Packaging, storage and transportation technical parts The terms used in this standard are in accordance with the provisions of CB/T2900.1 and GB2900.17. 4 Classification and rated parameters of relays
4.1 Type and classification
4.1.1 The construction principle of relays is divided into: rectifier type, static type, 4.1.2 The installation methods of relays are divided into: embedded installation and protruding installation. 4.1.3 The wiring methods of relays are divided into: rear wiring method and front wiring method. 4.1.4 The protection and fault nature of the relay is divided into: phase-to-phase protection relay and ground protection relay. 4.2 Model and meaning
The compilation of relay models is specified by enterprise standards. 4.3 Rated parameters
4.3.1 The rated value of AC voltage is: 100V. 4.3.2 The rated value of AC current is: 1,5A. 4.3.3 The rated value of power supply is: 50Hz. 4.3.4 The rated value of DC current is: 24, 48, 110, 220V.
1996-04-11
1996-10-01
4.4 Overall dimensions and installation dimensions
JB/T3310
The overall dimensions, installation dimensions and terminal dimensions of the relay are specified by enterprise standards. Figure-4.5 Weight
The weight of the relay is specified by enterprise standards.
5 Technical requirements
5.1 Influence quantities and influencing factors Reference conditions, reference values and test tolerances Reference conditions, reference values and test tolerances are shown in Table 1. Table 1
Influence quantities and influencing factors
Ambient temperature ℃
Atmospheric pressure Pa
Working position
External field induction intensity nT
Power supply frequency 12
Cross-combed inductive waveform
Auxiliary excitation quantity
AC component of vertical power supply (wave)
Vertical dry installation Vertical plane
Stop liquid
Rated value
5.2 Influence quantities and influencing factors Standard limit position for nominal range Test tolerance
Inclination in any direction shall not exceed 2°
Increase in any direction by more than 0.5
Not exceed ± 0. 2.5
The influence factor is not more than 2%
not more than 16%
The nominal range of the influence quantity and the influence factor is shown in Figure 2. Within this range, the relay should work reliably. Table 2
Influence quantity and influence factor
Ambient temperature
Atmospheric pressure Pa
Relative humidity
TWorking position
Power supply frequency 2
AC power supply waveform
Auxiliary excitation quantity
When the rated DC voltage is 111, 220V
When the rated output voltage is 21, 16V
AC system voltage
AC component (ripple) of DC power supply
5. 3 Other requirements for the use of the place
-10~+50 (static type:.
+400 (integrated type) The average temperature within 124h is not higher than 80-~110
The monthly average maximum relative humidity of the last month is 90%, when the monthly average minimum temperature of the month is 25℃, and there is no exposure to the surface, and the maximum temperature is 4, the average maximum relative humidity does not exceed 50%
The deviation from the base position in any direction does not exceed 5°su±1 bzxZ.net
The distortion factor is not more than 5%
Not more than 8℃%~110% Rated value
Not more than 9C% --110% rated value
Not more than 85%~110% rated value
Not more than 12%
a) The place of use is not allowed to have vibration response and impact response values exceeding the enterprise standard: b) The place of use shall not have explosive media, and the surrounding medium shall not contain gases and conductive media that corrode metals and damage insulation. It is not allowed to be filled with steam and have serious toxic bacteria; JB/T33101996
c) The place of use should only have protection against rain, snow, wind, and less facilities; d) If there are special requirements for the place of use, it can be specified in the enterprise standard. S.4: The extreme range of ambient temperature The extreme range of ambient temperature is -25℃ and +71C. The relay without excitation at the limit value will not suffer irreversible damage. After the temperature is quickly recovered, the main performance of the relay should still meet the provisions of Articles 5.5 to 5.11. 5.5 Most sensitive
Under rated value, the most sensitive negative recommended value of the relay: a) Phase protection for electrical appliances is -30 and -45
b) Contact protection relay is +70
) The angle error of the sensitivity does not exceed +5
If there are other requirements, please specify them in the enterprise standard. 5.6 Action range
According to the enterprise standard, and indicate the current excitation and voltage excitation of the phase. In general, the phase protection relay is not less than 160°, and the ground protection relay is not less than 120°. 5.7 Sensitivity
Under the most sensitive condition, when one input excitation is the rated value, change the other input excitation to make the relay operate, and the minimum value of this change is the sensitivity of the relay.
5.7.1 Voltage excitation sensitivity: Minimum operating voltage is specified by the enterprise standard. 5.7.2 Voltage excitation sensitivity: Minimum operating voltage is specified by the enterprise standard. 5. 8 Return coefficient
Return coefficient is specified by the enterprise standard.
5. 9 Action time
At the most sensitive angle and 0.5 times the rated current and 5 times the specified minimum action voltage, the action time of the relay is specified by the enterprise standard. Generally selected from the following data: 30, 35, 40m1s. 5.I Memory time
When the rated current and 10 times the rated current are suddenly applied to the phase-to-phase protection relay under the recording angle: the voltage is 100V and suddenly drops to zero at the same time, the relay should operate reliably, and its contact connection time is specified by the enterprise standard. 5.11 Creep
The relay should have no current and voltage creep. When the relay creeps, there should be no current creep when the relay voltage input excitation circuit is suddenly added and removed with 10 times the rated current input excitation after 20 seconds; there should be no voltage creep when the relay current circuit is not applied with input excitation and the voltage circuit is suddenly applied and removed with 10V voltage. 5.12 Power consumption
At the most sensitive angle and rated value, the power consumption of the current circuit, positive circuit and negative circuit of the relay shall be specified by the enterprise standard. 5.13 Impact of ambient temperature change on performance When the ambient temperature is the standard limit value of the nominal range specified in Table 2 of this standard, the most sensitive and the resulting deviation of the relay shall not exceed 210°, and other performances shall still meet the requirements of Articles 5.5 to 5.11. 5.14 Impact of power supply frequency change on performance When the power supply frequency is the standard limit value of the nominal range specified in Table 2 of this standard, the deviation of the main parts of the relay can be selected from the following grades: 2.5, 5.0, 7.5, 10.0. 5.15H Influence of the change of current source (auxiliary excitation quantity) on performance When the auxiliary excitation quantity is the standard limit value of the nominal range specified in the enterprise standard, the performance of the relay shall still meet the requirements of Articles 5.5 to 5.11.
JB/T33101996
Note that this is a requirement for maintenance appliances with auxiliary excitation quantity. 5.15 Effect of AC power waveform change on performance When the AC power waveform is the standard limit value of the nominal range specified in Table 2 of this standard, the variation of the main performance index is selected by the enterprise standard from the following percentage series: 2.5, 5.0, 7.5, 10.0. 5.17 Heat generation
5.17.1 Maximum allowable temperature
When the ambient temperature is 40℃ (or 50℃), the current input excitation circuit (and/or voltage auxiliary input excitation circuit) of the relay should be able to work for a long time under the condition of applying an input excitation amount of 1.1 times the rated value, without causing thermal damage to the insulation or other electrical components, and the maximum allowable humidity of each line should not exceed 105℃.
For heating elements that work with electricity for a long time, such as resistors, voltage stabilizers, etc., the maximum allowable temperature should not exceed 150, and it will not cause harmful thermal effects on its adjacent components.
5. 17-2 Extreme short-time withstand value
The current input excitation circuit of the relay shall be able to withstand 30 times the rated current for 1:1 test, without any insulation damage or other component damage. After that, when the positive load condition is restored, the relay shall meet the requirements specified in Articles 5.5 to 5.11. 5.18 Extreme dynamic stability
The current input excitation circuit of the relay shall be able to withstand 2.5 times the current value of the extreme short-time withstand value (but not more than 250A) for at least 10ⅡB, without any insulation damage, and without permanent mechanical deformation of the coil and structural parts. The product shall still meet the enterprise standards after half washing.
5.19 Insulation performance
If there are no other provisions, the insulation performance of the relay shall be checked under dry conditions and without self-heating. 5.19.1 Insulation resistance
The insulation resistance value measured by the test instrument with an open circuit voltage of 500V between each live conductive circuit of the relay and the ground (i.e. the housing or exposed non-live metal parts), and between each live conductive circuit without electrical connection in the relay (specified by the enterprise standard), shall not be less than 300MQ.
5.19.2 Dielectric strength
5.19.2.1 The following parts of the relay shall be subjected to dielectric strength test a) Between each live conductive circuit and the ground (i.e. the housing or exposed non-live metal parts); b) Between the live conductive circuits without electrical connection (specified by the enterprise standard). 5.19.2.2 The parts listed in Article 5.19.2.1 of this standard shall be able to withstand the test of 2kV<effective value) with a frequency of 501Iz for 1min (the AC test voltage value between weak current circuits shall be specified by the enterprise standard). 5.19.2.3 During factory inspection, the test duration is allowed to be shortened to 1%, but the test voltage is increased by 10%. 5.19.2.4 Qualification criteria: During the test, no absolute breakdown or flashover should occur in any part of the relay. 5.19.3 Net impulse voltage
The relay's charged conductive circuits to the ground (i.e., the housing or exposed non-charged metal parts), and the charged conductive circuits that are electrically connected (between the terminals of a given circuit as specified in the enterprise standard) should be able to withstand the short-term impulse voltage test of the standard lightning wave, and the test voltage value is 5 kV.
After the test, the relay should still meet the requirements of Articles 5.5 to 5.11. During the test process, flashovers that do not damage the insulation are allowed. If flashovers occur, the insulation resistance and dielectric strength should be rechecked, and the dielectric strength voltage value is 75% of the specified value. 5.20 Vibration response capability
The relay shall be able to withstand the vibration response test of severity level 1 specified in Article 5.10.4.1 of ZBK45020. During the test, the input excitation quantity and qualified criterion of the relay shall be specified by the industry standard. 5.21 Vibration durability capability
The relay shall be able to withstand the vibration durability test of severity level 1 specified in Article 5.10.4.2 of ZBK45020. 4
JB/T33101996
5.22 Impact response capability
The relay shall be able to withstand the impact response test of severity level 1 specified in Article 5.10.5.1 of ZBK45020. During the test, the input excitation quantity and qualified criterion of the relay shall be specified by the enterprise standard. 5.23 Impact durability capability
The relay shall be able to withstand the impact durability test with severity level 1 as specified in Article 5.10.5.2 of ZBK45020. 5.24 Withstand impact force
The relay shall be able to withstand the magnetic impact test of severity level 1 as specified in Article 5.10.6 of ZBK45020. 5.25 Resistance to moisture and heat
The relay shall be subjected to an alternating moisture and heat test under the conditions of a maximum temperature of 40°C and a test period of two cycles (18h>). Within 2h before the end of the test, the insulation resistance of the parts specified in Article 5.19 and 2.1 of this standard shall be measured with a test instrument with an open circuit voltage of 500V. The insulation resistance value shall not be less than 4M2, and the dielectric strength between each conductive circuit and the ground (casing or exposed non-electrical metal parts) shall be 75% of the specified test voltage. 5.26 Withstand attenuated oscillation wave pulse interference ability Static relays shall withstand a test voltage with a test rate of 1MIIz and a 100kHz attenuated oscillation wave, the first half-wave voltage amplitude of 2.kV in common mode and 1.0kV in differential mode. During the test, the relay input The excitation quantity and qualified criteria are stipulated in the enterprise standard. After the test, its performance should still meet the requirements specified in Articles 5.5 to 5.11. 5.27 Ability to withstand electrostatic discharge interference
Static relays should be able to withstand the electrostatic discharge interference test with a severity level of Class II specified in Article 4.1 of ZBK45032. During the test, the relay should not malfunction under the specified conditions, but it is allowed to use components such as light-emitting diodes to malfunction. After the test, the relay parts should not be damaged, and the performance indicators should still meet the requirements specified in Articles 5.5 to 5.11. 5.28 Ability to withstand radiated electromagnetic field interference
Static relays should be able to withstand the radiated electromagnetic field interference test with a severity level of Class I specified in Article A11 of Appendix A of JB/T7105. During the test, the relay should not malfunction, but it is allowed to display the indicator (such as light-emitting diode). After the test, the product should still meet the requirements specified in Article 5. 5.29 Contact performance
5.29.1 In a true current inductive load circuit with a voltage not exceeding 250V, a current not exceeding 1A or 2A, and a time constant of 40±6ms or 5±0.75ms, the disconnection resistance of the output contact of the relay terminal shall not exceed the enterprise standard (in W). 5.29.2 In a true current inductive load circuit with a voltage not exceeding 250V, a current not exceeding 1A or 2A, and a time constant of 40±6ms or 5±0.75ms, the disconnection resistance of the output contact of the relay terminal shall not exceed the enterprise standard (in W). 4±0.1 AC circuit, the disconnect capacity of the relay output contact shall be specified by the enterprise standard (unit: VA). 5.29.3 Under the load conditions specified in the previous article, the output contact circuit of the relay shall be able to reliably operate and return 10 times. 5.30 The impact of the interruption of the auxiliary excitation on the performance shall be specified by the enterprise standard. During this period, the relay shall not change the output state in an incorrect way. 5.31 The output contact of the relay shall not be connected to the load and shall be able to reliably operate and return 10 times. 5.32 Structure and appearance requirements. 32.1 The electrical clearance between the bottom outlet terminal of the relay shall be no less than 4 mm, and the creepage distance shall be no less than 6 nm. 5.32.2 When the relay adopts a plug-in structure, it shall be easy to plug and unplug, and shall have a plug-in and tightening mechanism. The contact of the connector shall be reliable, and its contact speed and other related performance indicators shall meet the technical conditions of the corresponding connector. s.32.3 The outer cover or cover of the relay should be made of transparent material as far as possible to facilitate observation of the interior. The outer cover or cover should be strong enough and not prone to aging, darkening, cracking, etc.
5.32.4 All metal parts inside the relay should have good protection measures 5.32.5 The current and voltage circuit wires of the relay should be plastic soft wires. The cross-section of the current circuit wire should not be less than 1.5mm, and the cross-section of the voltage circuit wire should not be less than U, 2 mm*. 5.32.6 Both ends of the current circuit wire should be fixed with anti-breaking measures, generally fixed with nails, and welding is not allowed. The voltage circuit wire should be fixed with screws 5
JB/T33101996
, and tinned solder pieces should be added
5.32.7 If the coil tap uses lead pieces, there should be lead piece grids on the frame to prevent the lead pieces from moving and causing the coil to break. The insulation inside the coil is not allowed to use materials that easily absorb moisture, such as Huang Zhenxi et al., 5.32.8 The internal wiring of the relay should be arranged neatly, closely and tied into bundles. A certain amount of margin should be left at both ends of the wiring to avoid being too tight and easy to break.
The relay should be provided with a lead seal.
5.32.10 The installation dimensions of the relay, if the model is the same, should be unified regardless of whether it is from the same manufacturer. 6 Inspection method
5. 1 Inspection conditions
If there is no special requirement, follow the relevant provisions of Chapter 3 of GB7261. 6.2 Structural and appearance inspection
Carry out structural and appearance inspection tests in accordance with the relevant provisions of Chapter 4 of GB7261. Article 5.4 The influence of the extreme range of ambient temperature, and the qualified judgment criteria in accordance with the provisions of Chapter 22 of GB7261. 6.31
Zero, the material of the components should not have irreversible changes; the main performance indicators of the relay should meet the requirements of Articles 5.5 to 5.11, b)
Period determination.
Test the most sensitive angle in Article 5.5 and the action area in Article 5.6 according to Article 2.1 of ZBK33001. Input excitation quantity according to enterprise standard 6.5 Test the alarm sensitivity in Article 5.7 and the return coefficient in Article 5.8 according to Article 2.2 of ZB K33001. 6.6 Test the action time in Article 5.9 according to Article 2.4 of ZB K33 001. 6.7
Test the memory time in Article 5.10 according to Article 2.8 of ZB K33 001. Test the current creep and voltage creep in Article 5.11 according to Articles 2.5 and 2.6 of 21K33C01. 6.8
Test the power consumption in Article 5.12 according to the method specified in Chapter 10 of GR7261. .
Test 5.13 The effect of ambient temperature change on performance shall be carried out according to the methods specified in Chapter 12 and Chapter 13 of GB 7261. Test 5.14 The effect of power supply frequency change on performance shall be carried out according to the methods specified in Chapter 15 of GB 7261. Test 5.15 The effect of AC power supply (auxiliary excitation) change on performance shall be carried out according to the methods specified in Chapter 15 of GB7261. 6.12
Test 3.16 The effect of AC power supply wave change on performance shall be carried out according to the methods specified in Chapter 15 of GB7261. Test 6.17.1 The maximum allowable temperature shall be carried out according to the methods specified in Chapter 11 of GB7261. 6.14
Test 5.17.2 The limit short-time withstand value shall be carried out according to the methods specified in Article 23.1 of GB7261. 6. 15
Test Article 5.18 Ultimate dynamic stability, according to the method specified in Chapter 20 of GB7261. Test Article 5.19 Insulation performance, according to the method specified in Chapter 20 of GB7261. 6.17
Test Article 3.20 Vibration response capability, according to the method specified in Article 16.2 of GB7261. 18
Test Article 3.21 Operation endurance capability, according to the method specified in Article 16.3 of GB7261. 6. 19
Test Article 5.22 Impact response capability, according to the method specified in Article 17.4 of GB7261. 6. 20 2
Test 5.23 Impact endurance shall be conducted in accordance with the method specified in Article 17.5 of GB7261. 6. 21
h.22 Test 5.24 Collision endurance shall be conducted in accordance with the method specified in Chapter 18 of GB7261. 6. 23
G.24 Test 5.26 Attenuated oscillation pulse interference resistance shall be conducted in accordance with the method specified in Chapter 19 of GB7261. 6.25 Test 5.27 Electrostatic discharge endurance shall be conducted in accordance with the procedure specified in Chapter 5 of BK15032. 6.26 Test the ability to withstand radiated electromagnetic fields in Article 5.28 according to the procedures specified in Chapter 4 of Appendix A of JB/T7105. 6.27 Test the contact performance in Article 5.29 according to the method specified in Chapter 21 of GB7261. The input excitation and test rate of the product are specified in the product enterprise standard, JB/T33101996. 6.28 Test the influence of interruption of auxiliary excitation on performance in Article 5.30 according to the method specified in Article 15.3 of GB72.61. 6.29 Test the mechanical life of Article 5.31 in accordance with the method specified in Chapter 25 of GB7261. The applied input excitation and test rate shall be in accordance with the product enterprise standard. After the test, the relay shall not have permanent and mechanical deformation, or loose fasteners. The variation caused by Articles 5.5 to 5.10 shall be specified by the enterprise standard. The dielectric strength shall be able to withstand 75% of the test voltage value specified in Article 5.19.2.1 of this standard. 7 Inspection rules
7.1 Product inspection is divided into the following three types 7.1.1 Factory inspection
Each relay shall be inspected before delivery. It can only be delivered after being confirmed as qualified by the quality inspection department, and shall have a product factory certificate proving that the product is qualified, recording the relevant data of the factory inspection. 7.1.2 Finalization inspection
a) Newly designed relays, including relays produced by transferred factories, shall be subject to finalization inspection before prototype trial production and appraisal, which shall serve as the basis for prototype trial production and appraisal of new products;
1b) When the design, manufacturing process or main components are changed to affect the main performance of the product, the first batch of qualified products produced shall be subject to finalization inspection.
7.1.3 Periodic inspection
Products that are continuously produced or have a production interruption of no more than two years shall be subject to a periodic inspection for each product that has passed the factory inspection. 7.2 Relay inspection items
7.2, "Factory inspection items" include Articles 5.5 to 5.11, Article 5.19.1 Insulation resistance and Article 5.19.2 Dielectric strength, Article 5.32 Structure and appearance requirements,
7.2.2 Finalization inspection items include all articles from Articles 5.1 to 5.32. 7.2.3 The items of final inspection include Articles 5.5 to 5.19 and Articles 5.25 to 5.32. 7.3 Sampling of relay inspection
7.3.1 Factory inspection is carried out one by one during the production process. 7.3.2 Final inspection is carried out by sampling three units each time, and the inspection is not grouped. 7.3 Periodic inspection is carried out by taking a second sampling method from a batch of relays that have passed the factory inspection. The first sampling is 6 units, and the second sampling is 6 units. After the relays sampled in the first sampling are tested and qualified according to the factory inspection item H, they are divided into two groups for inspection. The inspection items of each group are: Group A: Article 5.12 (power consumption), Article 5.13 (the influence of ambient temperature changes on performance), Article 5.4 (the limit of the extreme frost range of ambient temperature), Article 5.15 (the influence of vertical current power supply changes on performance), Article 5.17.1 (maximum allowable temperature), Article 5.17.2 (limit short-time acceptance value), Article 5.19.3 (impact voltage), Article 5.2.9 (Contact performance) Group B: Article 5.14 (Effect of power supply frequency changes on performance), Article 5.18 (Ultimate dynamic stability), Article 5.16 (Effect of AC power supply waveform changes on performance), Article 5.30) Effect of auxiliary excitation interruption on performance), Article 5.25 (Regulated thermal performance), Article 5.26 (Ability to withstand attenuation and oscillation interference), Article 2.27 (Ability to withstand electrostatic discharge interference), Article 5.28 (Ability to withstand radiated electromagnetic field interference), Article 5.31 (Mechanical life), 7.4 Inspection result judgment
7.4. "Output" inspection, each relay must meet the requirements of the product industry standard to be judged as qualified. 7.4.2 Finalization inspection: The relay must meet all the items specified in the enterprise standard. Adjustment of adjustable parts is allowed during the inspection. Replacing components is not allowed. However, the inspection situation should be recorded. The designer should provide a corresponding analysis report and provide product identification. After the first adjustment, if the sample meets the requirements of various indicators, it is judged to be qualified. After the adjustment, the performance of the sample is still unqualified, it is judged to be unqualified.
7.4.3 Periodic inspection: If the technician finds defects during the first sampling inspection, the sample is judged to be qualified. During the inspection, if a sample has a major defect, the first sampling is carried out. If the technician finds any major defects after the first sampling, it is also considered to be qualified for the periodic inspection. If the first sampling sample has major defects, the product is judged to be unqualified. When the first sampling samples are inspected separately, 7
JB/T3310
If any two sets of any group have the same major defect, the product is judged to be unqualified. 7.5 Major defects refer to items where the product needs to replace electrical components, structures and other parts during inspection in order to meet the requirements of the product enterprise standards in Articles 5.5 to 5.31.If the relay fails the regular inspection, the production of the relay shall be stopped until the cause of the failure is found and eliminated, and the inspection shall be carried out again. Only when the relay passes the inspection can the production be resumed.
8 Marking, packaging, transportation, storage
8-1 Each relay shall have a nameplate or a mark that serves as a nameplate, including: manufacturer name, trademark
b) plastic number and name;
) rated!
d) specification or setting range (when necessary): manufacturing year, month and number:
protection level (IP mark).
8.2 The wiring diagram code and rated value shall be marked on the relay wiring. 8.3 The text symbols of the components in the relay shall be clearly marked near the components. The markings shall be clear and durable for easy observation. There shall be a mark for viewing the terminal schematic diagram.
.4 When packing relays, the following requirements shall be observed: a) Each relay shall be wrapped with waterproof paper or plastic products, padded with waterproof materials on all sides, and placed in a packaging box; b) The accessories specified in this standard and packaging technical conditions shall be placed in the box, and the box cover shall be tightly sealed. 8.5 According to Section 8.4, the packed relays shall be placed in a dry and firm outer packaging box. The box must have moisture-proof and shock-absorbing measures and be able to resist mechanical vibration and impact, to ensure that the electrical equipment can be protected from damage during transportation, and to prevent the intrusion of dust and snow, in accordance with the requirements of JB/T7828.
8.6 The outer packaging shall be marked with non-fading paint: a) Name of the shipping factory:
Name and address of the receiving unit:
Model and name of the goods:
Date of delivery:
Gross weight of the goods;
Dimensions of the box (length × width × height)
The outer wall of the box shall be marked with "upward", "handle with care" and "moisture-proof". g>
8.7 The packaged relays shall be stored in a room that is rainproof and snowproof, with a relative condensation of no more than 80% and no acid, other corrosive or explosive gases in the surrounding air.
9 Others
9.1 The following items are supplied with the relay:
a) A product certificate filled in by the inspector and issued by the quality inspection department; a product instruction manual with a schematic wiring diagram; b)
c) Installation accessories supplied in the specified quantity; d) Spare parts supplied in accordance with the contract according to the user's requirements. 9.2 Warranty period
If the user fully abides by the transportation, storage, installation and use rules specified in this standard and the product instruction manual, the manufacturer shall be responsible for free replacement or repair of the relay and its accessories within two years from the date of delivery from the manufacturer. 8
Additional instructions:
JB/T3310
This standard was proposed and issued by Xuwu Relay Research Institute of the Ministry of Machinery Industry. This standard was drafted by Xuchang Relay Research Institute of the Ministry of Machinery Industry. The main drafter of this standard is Bai Juhua.
This standard was first issued in 1983 and revised for the first time in 1993. After the release, JB3310-83 Power Directional Relay Technical Specifications was revised as 9
JB/T3310
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