JB/T 3780-2002 Ordinary intermediate relay

This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, instruction manual, packaging, transportation and storage of intermediate relays. JB/T 3780-2002 Ordinary intermediate relays JB/T3780-2002 Standard download decompression password: www.bzxz.net

ICS29.120.70
2002-07-16
JB/T3780—2002
JB/T3780
2002-12-01
This standard is a revision of JB/T3780—1993 "General Medium-duty Relay". JB/T3780—2002
This standard is divided into 10 chapters, and the contents of Chapter 4, Chapter 5 and Chapter 6 are appropriately adjusted according to the provisions of JB/T9568-2000.
Compared with JB/T3780-1993, the main changes of this standard are as follows: The standards cited in this standard adopt the latest versions of the standards. .-According to the current industry standard JB/T9568-2000, the test tolerance of the AC power waveform in the original standard table 1 is changed from "distortion factor not more than 5%" to "distortion factor not more than 1%". The "external magnetic field magnetic induction intensity nominal range content" in the original standard table 2 is changed to "not more than 1.5m or specified by the enterprise product standard" according to the current industry standard TB/T9568-2000. According to the current industry standard B9568-2000: the original standard technical requirements "withstand the response ability of moving, withstand the impact of the market" In the "resistance to humidity and heat", "the time for the output contact to change to the normal state shall not exceed 2ms" is now changed to "the time for the output contact to change to the normal state shall not exceed 00"
According to the current industry standard JB/T9568-20005.13.3.2: "After the test, the relay shall be inspected for appearance after it recovers for 2h under the standard test atmosphere" is added to the technical requirements of the standard "resistance to humidity and heat". Chapter 8 of the original standard is divided into Chapters 8 and 9 according to GB/T1.2. Chapter 9 of the original standard is changed to Chapter 1C. The contents of Chapters 7 and 8 of the original standard are changed to "specified by the enterprise's product standards" and "specified by the enterprise's product standards in accordance with Chapter 8 of JB/T9568-2000" respectively.
- According to the current industry standard JB/T9568-2000, 11.1, the quality assurance period of one year stipulated in the original standard is changed to two years: In addition to the above, this standard has also made editorial modifications to individual text sentences. This standard replaces JB/T3780-1993.
This standard was proposed by China Machinery Industry Federation. This standard is under the jurisdiction of National Technical Committee for Standardization of Measuring Relays and Protection Equipment. This standard was drafted by Shanghai Relay Co., Ltd. Drafter of this standard: Wang Jiemin
This standard was first issued in 1984 and revised for the first time in 1993. 1
1 Scope
Ordinary intermediate relays
JB/T 37802002
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, instruction manual, packaging, transportation and storage of measuring intermediate relays.
This standard applies to ordinary intermediate relays (hereinafter referred to as relays) used in the secondary circuit of the power system. This type of relay is used as an auxiliary relay in the secondary circuit of the power system to increase the number of contact pairs of the previous relay. This standard is only applicable to new relays.
2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated minor application documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used: For any undated [history documents, the latest versions are applicable to this standard. GB/T2900.1—1992 Basic terms of electrical engineering (ne9 EC 60050) GB/T2900.171994 Electrical 1 Technology Electrical relays GB/T7261-2000 Basic test methods for relays and devices JB/T7828-1995 Technical conditions for packaging, storage and transportation of relays and their devices TB/T9568-2000 General technical conditions for relays, protection and automatic devices in power systems JBT10103-1999 Product model compilation sheet for relays and devices 3 Terms and definitions
The terms and definitions established in GB/T2900.1-1992 and GB/T2900.17-1994 apply to this standard 4 Product classification
Type and classification
The relay structure principle is electromagnetic type and is classified into: a) According to the installation method: protruding type and embedded type: b) According to the wiring method: front wiring and rear wiring:) According to the structural type: plug-in type and non-plug-in type: 4.2 Model and meaning
The compilation of relay models shall comply with the provisions of JB/T10103-1999. 4.3 Rated parameters and specifications
4.3.1 Rated voltage
Self-flow, 6V, 12V, 24V, 48V, 110V, 220V: AC (effective value): 12V, 36V, 100V, 127V, 220V. 4.3.2 Rated current
DC: 0.25A, 0.5A, 1A, 2A, 4A, 8A: AC (effective value): 0.5A, 1A, 245A. 4.3.3 Rated power supply frequency
50Hz. 60Hz.
JB/T 37802002
4.4 Variety specifications
Specified by the enterprise product standards.
4.5 Overall dimensions and installation dimensions
Specified by the enterprise product standards.
4.6 Egg quantity
Specified by the enterprise product standards.
5 Technical requirements
Baseline values ​​and test tolerances of influencing quantities and influencing factors The base values ​​and test tolerances of influencing quantities and influencing factors are shown in Table 1. Table 1 Base values ​​and test tolerances of influencing quantities and influencing factors Influencing quantities and influencing factors
Ambient temperature
Atmospheric pressure
Relative humidity
Magnetic induction intensity of external magnetic field
AC power waveform
AC component in DC
DC component in AC
Baseline value
86kPa--106tPa
45%~ 75%
Vertically installed on a vertical surface perpendicular to the ground plane 0
50Hz(60Hz)
Test tolerance
Tilting direction does not exceed 2°
No more than 0.5m in any direction
Distortion factor is not more than 1%
No more than 1% of the peak value (ripple)wwW.bzxz.Net
No more than 2% of the peak value (steady state)
Standard limit values ​​of the nominal range of influencing quantities and influencing factors The standard limit values ​​of the nominal range of influencing factors and influencing factors are shown in Table 2. Within this range, the relay should work reliably. Influencing quantities and influencing factors
Ambient temperature
Atmospheric pressure
Relative humidity
Working position
External magnetic field stress intensity
AC power supply waveform
AC component (ripple) in DC
Variation range of input excitation
Table 2 Influencing quantities and influencing factors Standard limit values ​​of nominal range Nominal range
—25℃~+40℃, the average temperature within 24h does not exceed 35℃80kPa~- 110kPA
The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is 25℃, and there is no condensation on the surface. When the maximum temperature is 40℃, the average maximum relative luminance shall not exceed 50%, and the deviation from the reference position in any direction shall not exceed 5\. The deviation shall not exceed 1.5mT or the distortion factor specified by the enterprise product standard shall not exceed 5%
50Hz±IHz, 60Hz±1.2Hz
Not more than 12% of the DC rated value
Other requirements for the place of use
When the rated voltage of the DC power supply is 110V and 220V, it shall be 80%~11m% of the rated value; when it is 48V and below, it shall be 90%-~110% of the rated value
85%~110% of the rated value
The place of use shall not have vibration response and impact response values ​​exceeding those specified by the enterprise standards: The place of use shall not have explosive dangerous media, and the surrounding medium shall not contain gases and conductive media that corrode metals and destroy insulation. It shall not be filled with water vapor or have serious mold: 2
c) The place of use shall be protected from rain and snow. Wind and sand facilities. 5.4 Limit values ​​of extreme range of ambient temperature
JE/T3780—2002
The limit values ​​of the extreme range of ambient temperature are -25℃ and +70℃. Under the limit values, the relay does not apply excitation and no irreversible damage occurs. After the temperature returns to normal, the main performance of the relay shall comply with the provisions of 5.5--5.7. 5.5 Action value and return value
5.5.1 Action value
a) The action value of a DC voltage relay is 30% to 70% of the rated voltage; b) The action value of an AC voltage relay is not more than 10% of the rated voltage; c) The action value of a current relay is not more than 80% of the rated current. 5.5.2 Return value
The return value of a relay should not be less than 10% of the rated value. 5.6 Action time
The action time of a relay is specified by the enterprise product standard and should generally not exceed 60ms. 5.7 Return time
The return time of the relay is specified by the enterprise product standard and should generally be no more than 60rs5.8 Impact of ambient temperature changes on performance
When the ambient temperature is the standard limit value of the nominal range specified in Table 2, the action value of the relay shall comply with the provisions of 5.5 of this standard, and the relay shall operate reliably.
5.9 Power consumption
At the rated value, the maximum power consumption of the relay is specified by the enterprise product standard5.10 Thermal performance requirements
When the ambient temperature is 40℃, the working winding of the relay shall be able to withstand 1.1 times the rated value for a long time without causing thermal damage to the insulation or other components. The maximum temperature of the coil shall not exceed 105℃. 5.11 Insulation Performance
5.11.1 Insulation Resistance
The total insulation resistance between each circuit of the relay and the exposed non-live metal parts and the casing, and between the coil circuit and the contact pedal, measured by a test instrument with an open circuit voltage of 500V, shall be no less than 300M2. 5.11.2 Dielectric Strength
5.11.2.1 The circuits of the relay and the exposed non-live metal parts and the outside, and between the working winding and the contact circuit not connected to the holding winding, shall be able to withstand an AC test voltage of 2kV (effective value) 50Hz for 1min without insulation breakdown or flashover. 5.11.2.2 Between different contact groups, they shall be able to withstand an AC test voltage of 1kV (effective value) 50Hz for 1min without insulation breakdown or flashover.
5.11.2.3 Between the same melting point group, it should be able to withstand 500V (effective value) 50Hz AC test voltage/, lasting 1min test, without insulation breakdown or flashover phenomenon.
5.11.2.4 During factory inspection, the test duration is allowed to be shortened to 1s, but the test voltage should be increased by 10% at this time. 5.11.2.5 When rechecking the dielectric strength: the test voltage value is 75% of the specified value. 5.11.3 Impulse voltage
Between each circuit of the relay and the exposed non-live metal parts and the casing, it should be able to withstand the test voltage with a waveform of the standard lightning wave and an amplitude of 5kV, and there will be no insulation damage afterwards. After the test, the relay should meet the performance requirements specified in 5.5~-5.7. During the test, flashover that does not damage the insulation is allowed. If flashover occurs, the insulation resistance and dielectric strength should be rechecked, and the dielectric strength test voltage value is 75% of the specified value. 5.12 Moisture and heat resistance
The relay is subjected to two cycles (48h) of alternating humidity and heat test at a maximum temperature of 40°C. Within 2h before the end of the test, the insulation resistance of the relay is measured at the specified positions in 5.11.1 using a test instrument with an open circuit voltage of 50V3
JB/T 3780-2002
. The insulation resistance should be no less than 4M2 and the dielectric strength should be able to withstand the recovery test voltage value specified in 5.11.2.5 without insulation breakdown or flashover. After the test, the relay should be visually inspected after it has been restored to standard test atmospheric conditions for 2h. 5.13 Disconnection performance
5.13.1 Contact breaking capacity
Relay contacts should be able to disconnect a DC membrane load circuit with a voltage not greater than 250V and a time constant of (5+0.75)ms or (40±6)1ms or an AC circuit with a voltage not greater than 250V (c0s unit = 0.4±0.1). Under the rated breaking capacity of the contacts, the maximum current allowed for contact breaking is generally selected according to Table 3.
Table 3 Rated breaking capacity of contacts,
Maximum current allowed for breaking and long-term permissible closing current Contact type
Rated breaking capacity
5.13.2 Long-term permissible closing current of contacts AC VA
Long-term permissible closing current - is generally selected according to Table 3. 5.13.3 Overload capacity
Maximum current A allowed to be disconnected
Long-term allowable
Minhe electric current
Contacts should be able to reliably close and disconnect 15 times the rated disconnection capacity for 10 times without continuous arcing. If there are special requirements, they should be specified by the enterprise product standards.
5.13.4 Contact time difference of melting point
Specified by the enterprise product standards,
5.13.5 Electrical life
Under the specified load conditions, the electrical life of the relay is 10 times or specified by the enterprise product standards. The electrical life test rate is 1800, after which the relay should meet the requirements of 5.5~-5.7 and be able to withstand the test voltage value specified in 5.11.2.5 (dielectric strength) without insulation breakdown or flashover.
5.14 Mechanical life
Under the specified positive load test conditions, the relay is placed in the positive load installation position, the rated excitation is applied, and no electrical load is applied to the contacts. At this time, the relay should be able to withstand 10 times of operation and return, and each cycle should be reliable. After the mechanical life test, the relay should have no damage such as permanent deformation of mechanical parts, and its performance should still meet the requirements of 5.5 to 5.7. The operating time of the relay is allowed to vary by 1.2 times of the specified value, and the test rate of mechanical life is 3600 times/h. 5.15 Vibration Withstand Capability
5.15.1 Vibration Withstand Response Capability
When the relay is in the working position, it shall be able to withstand the alarm response test specified in 5.12.4.1 of JB/T9568-2000. The severity level of the test is generally [level. If there are other special requirements, they shall be specified by the enterprise product standard. During the test, the input de-excitation amount is zero, the relay shall not malfunction, and the time for the output circuit to change the normal state shall not exceed 100μS. The input excitation amount is the rated value, and the release state shall not appear. After the test, the relay shall not be mechanically damaged, and its performance shall still meet the requirements specified in 5.5~5.7. 5.15.2 Vibration Withstand Durability
When the relay is in the working position, it shall be able to withstand the vibration durability test specified in 5.12.4.2 of JB/T9568-2000. The severity level of the test is generally 1 level. If there are other special requirements, they shall be specified by the enterprise product standard. During the test, the relay shall not be subjected to any load. After the test, the relay shall not be mechanically damaged, and its performance shall still meet the requirements specified in 5.5 to 5.7. 5.16 Impact Withstand Capacity
5.16.1 Impact Withstand Response Capacity
JB/T 3780-2002
When the relay is in the working position, it shall be able to withstand the impact response test specified in 5.12.5.1 of JB/T9568-2000. The severity level of the test is generally level 1. If there are other special requirements, they shall be specified by the enterprise product standards. During the test, the input excitation is zero and the relay shall not malfunction. The time for the output circuit to change the normal state shall not exceed 100S. The input excitation is the rated value, and the release state shall not appear. After the test, the relay shall not be mechanically damaged, and its performance shall still meet the requirements specified in 5.5 to 5.7. 5.16.2 Impact Endurance
When the relay is in the working position, it should be able to withstand the impact endurance test specified in 5.12.5.2 of JB/T9568-2D00. The severity level of the test is generally level 1. If there are other special requirements, they shall be specified by the enterprise product standards. During the test, no de-energization is applied to the relay. After the test, the relay should not be mechanically damaged, and its performance should still meet the requirements specified in 5.5 to 5.7. 5.17 Impact Withstand Capability
The relay shall be able to withstand the impact test specified in JB/T9568-20(0S.12.6. The severity level of the test is generally level 1. If there are other special requirements, they shall be determined by the enterprise product standards. During the test, the relay shall not be subjected to excitation, packaging, or any transport limiter. After the test, the relay shall not be mechanically damaged, and its performance shall still meet the requirements specified in 5.5 to 5.7. 5.18 Structural and Appearance Requirements
shall be specified by the enterprise product standards.
5.19 Electrical Air gap and creepage distance
The electrical gap between the relay terminals should be no less than 4mm. The creepage distance should be no less than 6mm: 6 Test method
6.1 The test conditions should comply with the provisions of Chapter 4 of GB/T7261-2000. 6.2 The inspection of structure and appearance should be carried out in accordance with the methods specified in Chapter 5 of GB/T7261-2000. 6.3 When testing 5.4, it should be carried out in accordance with the methods specified in Chapter 21 of GB/T7261-2000. 6.4 When testing 5.5, it should be carried out in accordance with the methods specified in Chapter 7 of GB/T7261-2000.1. Test circuit: see Figure 1. Test procedure: see Figure 2. During the test, the method of suddenly applying excitation is used to observe the action and return status of the relay. Drum test relay
Adjust the return value
Action indication uses a fast intermediate relay (action time is not more than 10ms) Figure 1 Action value and return value test wiring diagram
Maintaining electrical appliance
Apply excitation: 『——Action value: I
Rated value: II—Return value,
Relay working state: 0—Return state: 1-Action state,
Figure 2 Action value and return value test procedure
JB/T3780-2002
6.5 When testing 5.6, proceed according to the method specified in 8.1.2.1 of GB/T7261-—2000. The test wiring is shown in Figure 13 to Figure 4 or specified by the enterprise product standard. Adjust the excitation to the rated value, operate the switch S from position IV to position III (suddenly applied): measure the effective time. Test relay
Figure 3 Current type intermediate relay action time test circuit Jingshi Teng Electric Appliance
Figure 4 Voltage type intermediate relay action time test circuit 6.6 When testing 5.7, follow the method specified in GB/T7261-200018.1.2.2. The test wiring is shown in Figure 5 or specified by the enterprise product standard. Put the switch S in position II, adjust the excitation to the rated value, the relay is in the action state, operate the switch S from position II to TV, and measure the return time. For relays that are powered on for a long time, the return time is measured after 1 hour of power on. Figure 5 Intermediate relay return time test wiring diagram 6.7 When testing 5.8, follow the method specified in Chapter 9 of GBT7261-2000. 6
When testing 5.10, follow the method specified in Chapter 10 of GB7262000.6.8
When testing 5.9, follow the method specified in Chapters 11 and 12 of GB/T7261-2000.6.9
When testing 5.11.[, follow the method specified in 19.4.2 of GB/7261-2000. 6.10
When testing 5.11.2, follow the method specified in 19.4.1 of GB/T7261-2000. When testing 5.11.3, follow the method specified in 19.4.3 of GB/7261-2000. When testing 5.15.1, follow the method specified in 16.2 of GB/T7261:-2000. When testing 5.15.2, the method specified in 16.3 of GB/T7261-2000 shall be followed: 6.15
When testing 5.16.1, the method specified in 17.4 of GB/T7261--2000 shall be followed. 6.16
When testing 5.16.2, the method specified in 17.5 of GB/T7261-2000 shall be followed. When testing 5.17, the method specified in Chapter 18 of GB7261-2000 shall be followed. When testing 5.12, the method specified in Chapter 20 of GB/T726[-2000 shall be followed. When testing 5.13, the method specified in Chapter 23 of GB/T7261-2000 shall be followed. When testing 5.14, the method specified in Chapter 24 of GB/T7261-2000 shall be followed. When testing 5.19, use a vernier caliper for measurement. 7 Inspection rules
Specified by the enterprise product standards.
8 Marking, instruction manual
The enterprise product standards shall be specified in accordance with Chapter 8 of JB/T9568-2000. 9 Packaging, transportation and storage
Specified by the enterprise product standards in accordance with JB/T7828-1995. 10 Others
10.1 Documents and items supplied with the relay a) One quality certification document issued by the quality inspection department; b) One product instruction manual (with terminal wiring 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. 10.2 Quality Assurance
JH/T 3780-2002
Unless otherwise specified, if the user fully complies with the transportation, storage, installation and use requirements specified in this standard, product labels and product instructions, the manufacturer will repair or replace the relay and its accessories free of charge within two years from the date of shipment.
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