This standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and other contents of negative-sequence and zero-sequence current incremental relays. This standard applies to negative-sequence and zero-sequence current incremental relays (hereinafter referred to as relays) composed of negative-sequence and zero-sequence current filters and incremental output circuits. The relay is used as a starting element for fault discrimination in relay protection devices of power systems of 500KV and below. This standard serves as the basis for the design, production and use of such relays. This standard is only applicable to newly manufactured relays. This standard does not apply to negative-sequence and zero-sequence current relays. JB/T 3347-1996 Negative-sequence and zero-sequence current incremental relays JB/T3347-1996 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3347
1996-04-11www.bzxz.net
JB
1996-10-01
JB
1 Topic Content and Scope of Application
JB/T33471996
JB334783
This standard specifies the classification, technical requirements, inspection methods, inspection rules, specifications, packaging, transmission, storage and other contents of negative sequence and zero sequence current increment relays.
This standard is applicable to negative sequence and zero sequence current increment relays composed of negative sequence and zero sequence series current filter and increment output circuit: hereinafter referred to as relays). The relay is used as a starting element for fault discrimination in the relay protection equipment of 500kV and below power systems. This standard serves as the basis for the design, production and use of such relays. This standard applies only to newly manufactured relays. This standard does not apply to negative sequence and zero sequence current relays. 2 Reference standards
GB2900.1—92
GB 2900. 1783
GB 7361-87
GB 7268--87
G8 10231--88
ZB K45 020—90
Z13 K45 032--90
3 Terminology
Electrical terminology Basic terminology
Electrical terminology Relays and relay protection devices Basic test methods for relays and relay protection devices Plug-in boxes and plug-in panels for secondary circuit control protection devices of power systems Basic size series of protection relays Structural types and basic specifications General technical conditions for power system protection relays and devices Measuring relays and protection devices Electrostatic discharge test The terms used in this standard are in accordance with the provisions of GB2900.1 and G32303.17 + Product classification
4.1 Type and classification
4.1.1 According to the construction principle: rectifier relay, static relay. +.1.? According to the installation method: embedded relay, protruding relay. 4.1.3 Connection method: rear connection relay, front connection relay. 4.1 Type and meaning
The model and meaning of the relay shall be specified by the enterprise standard according to the requirements of the method for compiling the model of the relay and the device. 4.3 Rated value
a) AC current rating, 1, 5 A:
h) Power frequency rating: 50Hz;
c) DC voltage rating, 24, 4B, 110, 220 V. 4.4 Overall dimensions and installation dimensions
The overall dimensions, installation dimensions and dimensions of the electrical appliance shall be specified by the enterprise standard. 4.5 Weight
1996-04-11
1996-10-01 The weight of the relay shall be specified by the enterprise standard. 5 Technical requirements
JB/T3347
Influence quantity and influencing factors Case reference conditions reference values ​​and test tolerances 5.1
Influence quantity and influencing factors East reference conditions reference values ​​and test tolerances See 1, Table 1
Influence base and influence factors
Ambient temperature
Atmospheric pressure
Relative relative humidity
Working position
External magnetic field strength
Power supply frequency
Alternating power supply waveform
DC steady-state analysis in alternating current
Alternating power supply range display
Auxiliary excitation quantity
Normal installation year
Positive carbon wave
24. 48, 113. 220
Standard limit values ​​of influencing quantity and influencing factors Nominal range 5.2
Test tolerance
-20+- 10
Inclination in any direction shall not exceed 2°
Not more than 0. 5
Small excess ±α 25
Distortion factor shall not exceed 2%
Not more than 2% of the peak value
Not more than 6%
The standard limit values ​​of the nominal range of influencing pads and color response factors are shown in Table 2. Within this range, the relay group should work reliably. Table 2 Influence quantity and influencing factors Ambient blueness Atmospheric positive force Relative intensity Working position Power frequency Alternating current waveform Steady-state component of the primary current in the alternating current system AC component (induced wave) DC absorption Auxiliary power excitation quantity variation range 5. 3 Other requirements for the use of places
Flow type maintenance appliance:
Static type relay:
Nominal temperature
25---40℃
-10~+50℃:
24h average temperature does not exceed 35℃
80--110℃
The average relative humidity of the wettest month is 80℃, the average monthly temperature of the wettest month is 25℃, and there is no dew on the surface, the maximum height is 13 The average maximum relative humidity does not exceed 50%
The deviation from the reference position within 5°
The change is not greater than 5%
Not greater than 5% of the peak
Rated voltage: 110, 2.20Y is 80%~110% rated value Rated voltage: 24+48V is 90%110% rated value The use location is not allowed to exceed the ZBK45020 standard 5.10.41 and 5.1 0.5.1 The specified vibration response and impact response quantities:
b) Make sure that there is no explosive hazard in the place of use. The surrounding medium should not contain gases and conductive media that can corrode metals and damage insulation. It is not allowed to be filled with steam or have serious mold. JB/T33471996
) The place of use should have facilities to protect against rain, sand, wind and sand; d) The place of use is not allowed to have strong external magnetic induction intensity. 5.4 Influence Quantity and Influence Factor Extreme Range Limits The extreme values ​​of the temperature range are -25°C and -70°C. 5.5 Action Setting Value and Error
5.5.1 The action alarm setting values ​​of the negative sequence and zero sequence current increment relays are: 0.25 (0.05), 0.5 (0.1) and 1 (G.2) A. The data in brackets are the action setting values ​​when the set current is 1A. 5.5.2 The error of each action setting value is specified by the enterprise standard. The given error expressed as a percentage is generally selected from the following values: 0.5. 1.0. 1.5, 2.5- 5.0, 7.5, 10, 20.5.6 Action time
Under the condition of two times action value and any closing angle, the disconnection time of the relay contact should not exceed 10m5.5.7 Ability to protect symmetrical faults
Under the condition of four times action value and any closing angle, when the simulated conversion time is 3~10m1s for two-phase to three-phase symmetrical fault, the relay should be able to operate reliably.
For capacitor phase-shifting negative sequence current filter, the simulated conversion time is 0~10 ms. 5.B Reliability of self-holding
When the current of 10 times action setting value of two phases is applied and removed, the relay should operate and reliably maintain without returning. 5.9 Reset performance
When the two-phase 6 times rated current is suddenly applied to the relay, the relay should operate. After the relay operates, under the condition of 5 times rated current of two phases. Short-circuit the holding winding of the relay, the relay should be able to return. 5.10 Power consumption
The enterprise standard shall specify:
a) The power consumption of each phase of the relay at the AC rated value; b) The power consumption of the DC white holding circuit of the relay at the DC rated value: 5. [1 The impact of ambient temperature changes on performance The enterprise standard shall specify the difference in the relay action setting value and action time when the ambient temperature is within the range of change specified in Table 2. 5.12 The impact of auxiliary excitation interruption on performance For a relay with auxiliary excitation, when the auxiliary excitation interruption lasts for 100ms, the relay should not change the output state in an incorrect way.
5. 13 Contact performance
5.13. [In a DC inductive load circuit with a voltage not exceeding 250V, a current not exceeding 1A, and a time constant of 5±0.75ms, the disconnecting capacity of the relay output contact is 40W.
Usually: The contact capacity of a polarized relay or a small intermediate relay shall not be specified in the enterprise standard. 5.13.2 The long-term allowable on-current of the output contact is 1 A. 5.13.3 Under the load conditions specified above, the relay of the output contact circuit should be able to operate and return reliably 1000 times. 5.54 The best power issued by Lequan
When the first half cycle of the vibration is equal to or greater than 1 and 0 to 3 times the rated current, the relay should be able to operate normally. The enterprise standard should specify the unbalanced output value of the filter.
5.15 Thermal performance
5.15.1 Maximum allowable temperature
a) When the ambient temperature is the nominal standard limit value specified in Table 2 (working limit value), when the input excitation of the relay is 1.1 times the rated value, its current coil or voltage line diagram should be able to work for a long time without insulation or other electrical components being damaged. The maximum allowable temperature of each circuit is 3
JB/T33471996
b) When the input excitation is 1.1 times the rated value and the auxiliary excitation is the rated value, the maximum allowable temperature should not exceed 150, and it will not have a harmful thermal impact on its adjacent components. 5.15.2 Limit short-time withstand value
The relay circuit should be able to withstand 20 s of appropriate current without any damage to the circuit or other components. After returning to normal conditions, the main performance indicators of the relay should meet the factory inspection items and the provisions of Articles 5.16.1 and 5.16.2 of this standard, and the dielectric strength voltage should be 75% of the specified value.
5.15.3 Limit dynamic stability
The input excitation circuit of the relay should be able to withstand a value of 2.5 times the limit short-time withstand value specified in Article 5.15.2 of this standard for a duration of 10 seconds without any insulation damage, and the wires and structural parts should not be subject to permanent mechanical deformation. The performance of the relay shall comply with the provisions of Articles 5.5 to 5.9 and Articles 5.16.1 to 5.16.2 of this standard, but the dielectric strength voltage at this time is 75% of the specified value. 5.16 Insulation performance
The insulation performance of the relay shall be measured under dry conditions and without self-heating. 5.16.1 Insulation resistance
The insulation resistance 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, shall be measured by a test instrument with an open circuit voltage of 500V and its insulation resistance value shall not be less than 300M2. 5.16.2 Dielectric strength
5.16.2.1 The following parts of the relay shall be subjected to dielectric strength test: a) Between each live conductive circuit and the ground (non-live metal parts without housing or external circuit): b) Between each live conductive circuit without electrical connection 5.16.2.2 The parts listed in Article 5.16.2.1 shall withstand an AC test voltage of 2kVl (effective value) with a frequency of 50Hz for 1min. Other circuits shall be specified by enterprise standards when required. 5.16.2.3 During the factory inspection, the permitted inspection duration is shortened to 15, but the inspection voltage value should be increased by 10%. 5.16.2.4 Qualification criteria. During the inspection, there should be no insulation breakdown or flashover in any part of the relay. 5.16.3 Impact voltage
The relay's charged conductive circuits to the ground (externally charged or exposed non-charged parts), as well as the relay's charged conductive circuits without electrical connection, should be able to withstand the short-term impulse voltage test of the standard required electric wave, and the peak value of the inspection voltage is 5kV. After withstanding the impulse voltage, the relay's main performance indicators should meet the requirements of the factory inspection items specified in the relay's enterprise standard. During the inspection, flashovers that do not cause insulation damage are allowed. If flashovers occur, Articles 5.16.1 and 5.16.2 should be reviewed, but the dielectric strength voltage is *5% of the specified value. 5.17 Vibration response capability The relay should have the ability to withstand the vibration response of the severity level 1 specified in Article 5.10.4.1 of ZBK45020. 5.18 Vibration endurance capability The relay should have the ability to withstand the vibration endurance of the severity level 1 specified in Article 5.0.4.2 of ZBK45020. 5.19 Impact response capability The relay should have the ability to withstand the impact response of the severity level 1 specified in Article 5.10.5.1 of ZBK45020. 5.20 Impact durability
The relay shall be able to withstand the impact durability of the severity level 1 specified in Article 5.10.5.2 of ZBK45020. 5.21 Shock resistance
The relay shall be able to withstand the magnetic impact of the severity level 1 specified in Article 5.10.6 of ZBK45020. 5.22 Moisture and heat resistance
The relay shall be tested at a maximum temperature of 40℃ and a test cycle of two cycles (48h). Within 2h before the end of the test, the relay shall be tested by alternating sensible heat. The insulator resistance value specified in Article 5.16.1 shall be no less than 4MQ using a test instrument with a voltage level of 500V. The dielectric strength specified in Article 5.16.2 of JB/T33471996 shall be tested. The dielectric strength voltage shall be 75% of the specified value. 5.23 Ability to withstand attenuated oscillation pulse interference The relay should be able to withstand attenuated oscillation pulse interference with a frequency of 1 MHz and 100 MHz. The common mode voltage amplitude of the first half-wave is 2.5 k and the differential voltage is 1.0 E
5. 24 Ability to withstand electrostatic discharge interference
The relay should be able to withstand electrostatic discharge interference with a severity level of 1000 and 1000 as specified in Section 4.2.2 of ZBK45032. 5.25 Mechanical life
The output melting point of the relay is not connected to load and should be able to operate and return reliably for 1000 times. When the relay only uses electromagnetic relay in the output circuit, it is not necessary to assess the mechanical life of the relay after it is proved that the relay meets the mechanical life requirements.
5.26 Structural and appearance requirements
5.16.1 The relay should be protected by a casing with a protection level of 1P50. The action indicator or set value should be visible without opening the transparent cover. The transparent cover should be bright, free of stains and scratches.
5.26.2 The metal casing should have a safe grounding facility, and the grounding point should be clearly marked. The grounding wires in the electrical appliance should be connected to the grounding point as required, and ensure that the grounding is fingertipable.
5.26.3 The electrical gap between any two conductive parts of the external part of the electrical appliance (i.e. the complete body) shall not be less than 4mm (2ma for the rated voltage of the circuit not more than 6V), and the electrical gap between the live part and the exposed metal parts shall not be less than 11 (3mm for the rated voltage of the circuit not more than 60V).
5.26.4 The relay shall have the facility to remove the lead seal. Only by removing the aluminum seal can the shell be opened for adjustment or maintenance. 5.26.5 The action display shall be able to clearly display the action state and reset state of the relay. After the action, it can be reset without opening the cover. It should also be convenient for battery replacement and inspection. 5.26.6 All parts, components and installation parts shall be clean, free of dust, oil, residual chips and foreign matter. The surface of the parts shall not be damaged during transportation and assembly, which may affect the surface quality, such as deformation, convex pits, lithium impact marks and other defects. 5.26.7 Metal parts should be treated with anti-corrosion and free of rust. The electroplating and surface coating layers should be free of defects that affect the coating performance and appearance quality. At the same time, there should be no scratches or other defects that damage the appearance quality during the assembly process. 5.26.8 Insulation should be made of flame-retardant insulating materials, and parts should be free of wrinkles, defects and burrs. 5.26.9 After the relay is assembled, the components are arranged neatly and in a symmetrical and beautiful manner. The mechanical connection or electrical connection of each part should be firm, correct and reliable. There should be no looseness.
5.26.10 All welding places should be firm and reliable without false induction; welding places should be clean and not allowed to corrode the connected parts and components.
3.26.11 For relays with adjustable setting values, the adjustment mechanism should have a braking or locking device. For relays with setting pins, the setting pins should be flexible to operate and have reliable contact. 5.26.12 The color configuration of the external relay should be harmonious and reasonable, without glare, and the same color should be evenly distributed. 5.26.13 The nameplate and panel should be attractive, clear and neat. The trademark and logo should be clear and correct. 5.26.14 The plug-in of the relay should ensure universality and interchangeability, the contact part should be reliable, and the plug-in and pull-out should be flexible and convenient. The plug-in should have a locking mechanism. When the plug-in is inserted or pulled out, there should be no phenomenon such as components or wires colliding with the shell or getting stuck. 5.26.15 The wire end of the internal connection wire of the relay and the terminal should generally use a crimping joint: connected to the sub through a tight fitting, the voltage circuit is allowed to use a welding piece,
5.26.16 The wire terminal connecting the external wire should be able to be connected without removing the external wire, and should ensure that it can connect two wires with a core cross-sectional area of ​​1.5mm* (voltage circuit and current circuit with a rated current not greater than 5A) or 2.5mm2 of insulated wire. 3.26.17 The electronic components used in the relay shall meet the requirements of the corresponding technical standards, and after aging screening, they shall be checked according to the relevant technical documents for the specified items and have a certificate of inspection. 5.26.18 The relays and components (such as switches, buttons, connectors, etc.) used in the relay shall meet the relay design requirements and relevant technical standards, and shall have a certificate of conformity.
6 Inspection method
JB/T3347
6.1 Inspection conditions shall be in accordance with the relevant provisions of Chapter 3 of GB7261. 6.2 Inspection of structure and appearance requirements shall be in accordance with the relevant provisions of Chapter 4 of G7261. 6.3 Test the influence of the temperature limit value of Article E.4, and follow the provisions of Method 2 of Chapter 22 of GB7281. The qualified judgment criteria are: a) The parts and components materials shall not have irreversible damage; b) The main performance of the relay shall meet the requirements of the factory inspection specified in Article ?.2.1. 6.4 Test the setting value and error of Article 5.5, and conduct the inspection according to the wiring of Figure 1. The action value should be measured by the method of suddenly applying current and the test should be calculated by 10 times. If a phase switch or impedance is used during the inspection, the relay should not operate reliably when the setting value is -31 or below.
6.5 Test the action time of Article 5., and conduct the inspection according to Figure 1. If a phase closer is used, the delay device L1, t2 should be adjusted to zero, that is, the closure of K1 or K2 and K3 should be guaranteed to be as timely as possible, and the action time should be based on the average value of 10 times, phase closer
regulator
phase release
phase pull closer
start timing
tl, t2 - delay device R1, R2. R3--- sliding resistor, KI, 2, K3--- phase closer output relay; A ammeter (AC 2- group reactor (the reactor value is selected within 152, and the three reactor values ​​are best consistent): S-bipolar switch-voltage resistor | DC) verification: For relays with holding circuits, the rated holding voltage value should be added during inspection. 6.6 Test the ability of symmetrical fault protection in Article 5.7. According to the wiring diagram of Figure 1, make a two-phase to three-phase symmetrical fault. The conversion time is 3 to 10 seconds. The relay should operate reliably.
6.7 Test the reliability of self-holding in Article 5.8. According to the wiring diagram of Figure 1, suddenly apply and remove the two-phase 10 times action setting value current to the relay. The relay should operate and reliably maintain without returning. 6
JB/T33471996
6.B Test the reset performance in Article 5.9. According to the wiring diagram of Figure 1, suddenly apply the two-phase 6 times set current to the relay. The relay should operate. If there is no action to maintain the state, the relay should automatically return to the same state after a delay of 1 hour. If there is a holding circuit, the relay should return immediately after the short-circuit holding winding is started.
6.9 Test the power consumption in Article 5.10. According to the method of Chapter 10 of GB7261. 6.10 Test the effect of ambient temperature change on performance in Article 5.11 according to the methods in Chapter 12 and Chapter 13 of GB 7261. 6.11 Test the effect of interruption of auxiliary excitation on performance in Article 5.12 according to the methods in Article 15.3 of GB 7261. 6.12 Test the melting point performance in Article 5.13 according to the methods in Chapter 24 of GB 7261. The applied input excitation is the specified value in Article 5.13.1, and the test rate is 1800 times/h. After 1000 operations, the relay can still meet the requirements of Articles 5.5 to 5.9, Article 5.14 and Article 5.16, but the dielectric strength test voltage should be 75% of the specified value. 6.13 Test the full-phase oscillation capability of Article 5.14. According to the National 1 wiring, the negative current filter should be adjusted first and the negative sequence setting value should be set to the minimum position before the inspection is carried out. The symmetry of the three-phase power supply should be checked. 6.14 Test the maximum allowable temperature of Article 5.15.1 according to the method of Chapter 11 of GB 7261. 6.15 Test the ultimate short-time withstand value of Article 5.15.2 according to the method of Article 23.2 of GB 7261. 6.16 Test the ultimate dynamic stability of Article 5.1S.3 according to the method of Article 23.2 of GB 7261. 6.1T Test the insulation performance of Article 5.16 according to the method of Article 20.6.18 Test the vibration response capability of Article 5.17 according to the method of Article 16.2 of GB7261. When the rated primary current of the current transformer is applied to the relay during the test, the relay should not malfunction. The interference is added first and then the incremental action value is added, and the relay should not refuse to operate. 6.19 Test the durability of alarm response in Article 5.18 according to the method of Article 16.3 of GB 7261. 6.20 Test the ability to withstand the outrush response in Article 5.19 according to the method of Article 17.2 of GB7261. The application of input excitation during the test and the qualified criterion are the same as Article 6.1B.
6.21 Test the durability of impact resistance in Article 5.20 according to the method of Article 17.3 of GB7261. 6.22 Test the ability to withstand impact in Article 5.21 according to the method of Chapter 1E of GB7261. 6.23 Test the heat and humidity resistance in Article 5.22 according to the method of Chapter 21 of GB7261. 6.24 Test the ability to withstand full-wave pulse interference in Article 5.23: Perform the test in accordance with the method in Article 19 of GB7261. During the test, the relay components should not be damaged, and the main performance of the relay should meet the requirements of the factory inspection items specified in Article 7.2.1. 6.25 Test the ability to withstand electrostatic discharge interference in Article 5.24: Perform the test in accordance with the method in Chapter 5 and Chapter 6 of ZBK45032. During the test, the optical components in the relay should not be damaged, and the main performance of the relay should meet the requirements of the factory inspection items specified in Article 7.2.1. 6.26 Test the mechanical life in Article 5.25: Perform the test in accordance with the method in Chapter 25 of GB7261. During the test, the input excitation or auxiliary excitation applied to the relay is the rated value, and the inspection rate is 1800 times/. After the inspection, the relay shall not have mechanical damage and loose fasteners. The main performance shall meet the requirements of the factory inspection items specified in Article 7.2.1. The error of the action setting value shall not exceed twice the specified value. The voltage of the relay shall be 75% of the specified value.
7 Inspection rules
7.1 Types of relay inspection
Relay 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 approved by the quality inspection department. It shall also have a certificate of qualification proving the qualification of the relay.
7.1.2 Finalization inspection
a) Newly designed relays, including relays produced by transferred factories, shall be subject to finalization inspection before trial production and appraisal of prototypes, which shall serve as the basis for trial production and appraisal of new product prototypes!
6) When the design, manufacturing process or main components are changed, which affects the main performance of the relay, the first batch of qualified products put into production shall be subject to finalization inspection.
7.1.3 Periodic type inspection (referred to as type inspection) JB/T33471996
For relays that are continuously produced or whose production is interrupted for no more than two years, a periodic type inspection shall be carried out every two years on the relays that have passed the factory inspection.
7.2 Relay inspection items
7.2.1 The factory inspection items for relays are Articles 5.5 to 5.9, Articles 5.14, 5.16.1, 5.16.2 and 5.26. 7.2.2 The finalization inspection items are all items from Articles 5.4 to 5.26. 7.2.3 The type inspection items are all items from Articles 5.4 to 5.16, and Articles 5.22 to 5.26. 7.3 Inspection sampling and grouping of relays
7.3.1 Strict inspection is carried out one by one during the production process. T.3.2 Finalization inspection: the number of samples is 3, and no grouping is performed during inspection. 7.3.3 Type inspection: a batch of relays that have passed the factory inspection shall be sampled by "second sampling method, 4 units are sampled each time, and 4 units are sampled the second time. After the relays sampled in the first time are inspected according to the inspection items, they are divided into two groups for inspection respectively. The inspection items of each group are:
Group A continues to carry out Article 5.4, Article 5.15.1, Article 5.11, Article 5.12, Article 5.13. Article 5.16.3 and Article 5.24, etc.
Group B continues to carry out Article 5.10, Article 5.15.2, Article 5.15.3, Article 5.22, Article 5.23 and Article 5.25, etc. 7.4 Inspection results
7.4.1 Factory inspection: Each appliance must meet the requirements of 7.2.1 to be qualified. 7.4.2 Final inspection: The sample should meet the requirements of 7.2.Article 2 stipulates that the inspection allows the adjustment of adjustable parts, but does not allow the replacement of components. After one adjustment, if the sample meets the requirements of various indicators, it is judged to be qualified. After the second adjustment, the performance of the product is still unqualified! It is judged to be unqualified.
7.4.3 Type inspection, if no defects are found in the first sampling inspection, the sample is judged to be qualified. If a relay has a major defect during the inspection, a second sampling will be carried out. If no major defects are found in the second sampling sample after type inspection, it is also considered to be qualified for the type inspection. If the second sampling sample still has major defects, the relay is judged to be unqualified. When the first sampling sample of the relay is grouped for type inspection, if two relays in any group have the same major defect, the relay is judged to be unqualified. 7. Three major defects refer to: during the inspection, the relay needs to replace components or parts before it can meet the requirements of Article 7.3.3. 7.6 If the relay fails the type inspection, the production of the relay shall be stopped until the cause of the failure is found and eliminated, and the type inspection shall be carried out again. Production can only be resumed after passing the inspection.
8 Marking, packaging, transportation, and storage
shall be specified by enterprise standards.
9 Random documents, accessories and spare parts
shall be specified by enterprise standards.
10 Quality assurance
10.1 Relay quality assurance conditions
a) After the relay leaves the factory, if the user fully complies with the storage, installation and use rules specified in this standard and the instruction manual, it shall be approved in accordance with this standard:
After the relay leaves the factory, if the user finds that the relay or accessories are damaged during unpacking inspection due to transportation reasons, it shall be approved in accordance with this standard. b) If the performance of the relay or accessories does not meet the requirements of this standard or is damaged due to improper use or installation by the user, it is not within the scope of this standard. c) ：
JB/T3347
10.z Quality Supervision Warranty Period
In accordance with the provisions of Article 10.1 and Article 10.1b of this standard, the quality warranty period of the relay is one year from the date of shipment from the manufacturer.
10.3 Quality Warranty Measures
8) In accordance with the quality warranty period of the relay specified in Articles 10.1, 10.1b and 10.2 of this standard, if the performance of the relay or its accessories does not meet the requirements of this standard or the relay or its accessories are damaged, the manufacturer shall be responsible for replacement or repair.b) In accordance with If the conditions specified in Article 10.1 and Article 10.1b of this standard are met, but the quality warranty period specified in Article 10.2 is exceeded, if the performance of the relay or accessories does not meet the requirements of this standard or the relay or accessories are damaged, the user should negotiate with the manufacturer to replace or repair them with compensation.
c) If the situation falls under the provisions of Article 10.1c of this standard, the user should negotiate with the manufacturer to replace or repair them with compensation. Additional notes:
This standard was proposed by the Ministry of Machinery Industry.
This standard was proposed by the Xuchang Relay Research Institute of the Ministry of Machinery Industry. Drafted and coordinated. The main drafter of this standard is Yang Lian.
This international standard was first issued in 1983 and revised for the first time in 1994. From the date of issuance, the original standard J33473 is invalid.
JB/T3347
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