Some standard content:
JB/T9575-1999
This standard is a revision of ZBK45027-90 "Technical Conditions for Overcurrent Relays and Protective Devices". In the revision of this standard, the writing format and rules are in accordance with the provisions of GB/T1.1-1993 and GB/T1.3-1997, and the referenced standards are all the latest versions. At the same time, the content of undercurrent and negative sequence current relays is added. The technical content of the standard has added anti-interference test and vibration, collision, impact and other test items. The name of the standard is changed to "Current Relays and Protective Devices". This standard is divided into 9 chapters. According to the provisions of GB/T1.3-1997, the original standard Chapter 8 is divided into Chapter 8 and Chapter 9. This standard replaces ZBK45027-90 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Measuring Relays and Protective Equipment. This standard is drafted by Acheng Relay Co., Ltd. Drafters of this standard: Zhao Yucheng, Yu Yang. This standard was first issued in 1990 and revised for the first time in 1999. 115
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Mechanical Industry Standard of the People's Republic of China
Current relay and protection equipment
Current relay and current protection equipmentJB/T 9575-1999
Replaces ZBK45027-90
This standard specifies the product classification, technical requirements, test methods, inspection rules, markings, operating instructions, packaging, transportation and storage of current relays and protection equipment.
This standard applies to current relays and current protection equipment (hereinafter referred to as products). Such products are used in relay protection lines such as power transmission lines, generators, transformers, etc. in power systems as overcurrent or undercurrent protection. This standard also applies to zero-sequence current and negative-sequence current products. This standard does not apply to inverse time, negative sequence inverse time overcurrent products and current protection products with directional or filtering ratio functions. This standard is only applicable to new products.
2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When the standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1.3——1997
GB/T762—1996
Guidelines for standardization work Unit 1: Drafting and expression of standards Part 3 Provisions for the preparation of product standards
Rated current of electrical equipment (eqvIEC60059:1938) GB/T2423.4—1993 Basic environmental test procedures for electrical and electronic products Test Db: Alternating damp heat test method (eqvIEC60068-2—30-19 80)
Basic terms of electrical engineering
GB/T2900.1—1992
GB/T2900.17-1994 Electrical terms Electrical relay (eqvIEC60050—446:1983) GB/T2900.49—1994 Electrical terms Power system protection (eqvIEC60050—448:1995) GB/T7261-—1987
GB/T 8367-1987
GB/T11287—1987
GB/T14537—1993
Basic test methods for relays and relay protection devices Measurement of interruption and AC component of DC auxiliary excitation quantity of relays (eqvIEC60255-—11:1979) Vibration (sinusoidal) test for relays and relay protection devices (eqvIEC60255--21-1:1988) Impact and collision test for relays and relay protection devices (eqvIEC60255--21-2:1988) GB/T14598.3-1993
3 Electrical relays Part 5: Insulation test for electrical relays (eqvIEC60255--5:19 90) GB/T14598.9-1995 Electrical relays Part 22: Electrical interference tests for measuring relays and protection devices Part 3 Radiated electromagnetic field interference tests (idtIEC60255-22-3:1989) GB/T14598.10-1996 Electrical relays Part 22: Electrical interference tests for measuring relays and protection devices Part 4 Fast transient interference tests (idtIEC60255-22-4:1992) GB/T14598.13-1998 Electrical interference tests for measuring relays and protection devices Part 1 1MHz pulse group interference test Approved by the State Bureau of Machinery Industry on August 6, 1999 116
2000-01-01 implementation
JB/T 9575-1999
Test (idtIEC60255-22-1:1988) Electrical relays Part 22 Electrical disturbance tests for measuring relays and protection devices GB/T14598.14-1998
Part 2 Electrostatic discharge tests (idtIEC60255--22--2:1996) JB/T7828-1995
3 Definition
Technical conditions for packaging, storage and transportation of relays and their protection devices The definitions of terms used in this standard are in accordance with the provisions of GB/T2900.1, GB/T2900.17 and GB/T2900.49. 4 Classification
Type and classification
a) According to the construction principle: electromagnetic type, rectifier type, static type; b) According to the protection mode: overcurrent, undercurrent, negative sequence current, zero sequence current; c) According to the wiring mode: single-phase, two-phase, three-phase; d) According to the structure type: fixed structure, plug-in structure; e) According to the installation method: protruding installation, embedded installation, block installation. 4.2 Model and meaning
Product model and meaning uniformly issued by the manufacturer after verification. 4.3 Variety specifications
According to the specific parameters and specific uses of the product, it is specified in the enterprise product standards. 4.4 Rated parameters
a) AC current rating: in accordance with GB/T762;.b) AC frequency rating: 50Hz;
c) DC auxiliary excitation quantity rating: 220V, 110V, 48V. For a dedicated DC power supply, the rated DC voltage refers to the input voltage of the dedicated power supply.
4.5 Appearance and installation dimensions
Specified by the enterprise product standards.
4.6 Weight
Specified by the enterprise product standards.
5 Technical requirements
5.1 Reference conditions, reference values and test tolerances of influencing quantities and influencing factors. The reference conditions, reference values and test tolerances of influencing quantities and influencing factors are given in Table 1. 5.2 Standard limit values of the nominal range of influencing quantities and influencing factors The standard limit values of the nominal range of influencing quantities and influencing factors are given in Table 2. The product should work reliably within this nominal range. 117
JB/T9575--1999
Table 1 Reference conditions and test tolerances of influencing quantities and influencing factors Influencing quantities and influencing factors
Ambient temperature
Atmospheric pressure
Relative humidity
Working position
Power supply frequency
AC power supply waveform
DC component in AC
Three-phase balanced power supply phase current
AC component in DC (ripple)
86~106kPa
45%~75%
Vertical to the vertical plane of installation
Sine wave
Equal in size
1) When conducting a variation test caused by temperature. This range can be exceeded as long as there is no condensation. Test tolerance
±2℃
2° in any direction
±0.25 Hz
Distortion factor not more than 2%
Not more than 5% of the peak value
Not more than 2% of the peak value
Not more than 1% of the average value of the system current
Not more than 6%
Standard limit values of the nominal range of influencing quantities and influencing factors Influencing quantities and influencing factors
Ambient temperature
Atmospheric pressure
Relative humidity
Working position
Power supply frequency
AC power supply waveform
DC component in AC
AC component in DC (ripple)
Variation range of auxiliary excitation quantity
0~45℃.-10~+50（55）℃.-25~+40℃24h average temperature does not exceed 35℃
80~110kPa
The average maximum relative humidity of the wettest month is 90%. At the same time, the average minimum temperature of the month is 25℃. There is no condensation on the surface. The average maximum relative humidity does not exceed 50% when the maximum temperature is 40℃
Deviate from the reference position in any direction by 5°
50Hz±1Hz
Distortion factor is not more than 5%
Not more than 10% of the peak value
Not more than 5% of the peak value
Not more than 12%
When the rated voltage of the DC power supply is 110V and 220V, it is 80%~110% of the rated value; when it is 48V and below, it is 90%~110% of the rated value
Note: 0~45℃ is applicable to microcomputer products in static products; -10~+50(55)C is applicable to static products; 25~+40℃ is applicable to electromagnetic products and rectifier products.
Other requirements for the place of use
a) The place of use is not allowed to have vibration and impact values exceeding the allowable values specified in 5.21 and 5.23 of this 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 destroy insulation. It is not allowed to be filled with water vapor and have serious mold: c) The place of use should have facilities to prevent rain, snow, wind and sand; 118
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d) The place of use is not allowed to have strong external magnetic field induction intensity. 5.4 Extreme range limit values of ambient temperature
The extreme range limit values of ambient temperature are -25℃ and 70℃. Under the conditions of transportation and storage, products without excitation can withstand temperatures within this range and should not suffer irreversible damage. 5.5 Action current setting range
Specified by the enterprise product standards.
5.6 Average error of action setting value
The absolute value of the average error of action setting value shall be less than or equal to the given error value. The given error is generally selected from the following data or specified by the enterprise product standard:
0.5%, 1.0%, 1.5%, 2.5%, 5%. 5.7 Consistency of action value
Selected from the following data by the enterprise product standard: 0.5%, 1.0%, 1.5%, 2.5%, 5.0%. 5.8 Action time and delay setting range
The action time of over-measured products at 1.1 times the action value and 2 times the action value; the action time of under-measured products at 0.5 times the action value and the setting range of delay elements are specified by the enterprise product standard. 5.9 Consistency of action time
is selected from the following data by the enterprise product standard: 0.5%, 1.0%, 1.5%, 2.5%, 5.0% 5.10 Average error of delay setting value
The absolute value of the average error of the delay setting value should be less than or equal to the given error value. The given error is generally selected from the following data or specified by the enterprise product standard:
0.5%, 1.0%, 1.5%, 2.5%, 5.0%. 5.11 Return coefficient
For overcurrent products, it should not be less than 0.8; for undercurrent products, it should not be greater than 1.2. If there are special requirements, it can be specified by the enterprise product standards. 5.12 Reliability during operation
For electromagnetic overcurrent products, the following requirements should be met: a) Under the action current or return current, the movable system of the product should not stagnate in the middle position; b) When the coil is suddenly excited by 1.75 times the setting current, the product's moving contact should be closed without jitter; c) When there is no external collision and vibration, the product's setting position is the middle of the dial (or high setting position), and when the input excitation is 0.6 times the setting current, the product's moving contact should be reliably closed. 5.13 Power consumption
Specified by the enterprise product standards.
5.14 Effect of ambient temperature change on performance When the ambient temperature is the standard limit value of the nominal range specified in Table 2 of 5.2 of this standard, the consistency and average error variation (compared with the reference temperature conditions) of the product's action setting value and action time (delay) shall be specified by the enterprise product standard, and the absolute value of the variation shall be selected from the following data or specified by the enterprise standard: 119
0.5%, 1.0%, 1.5%, 2.5%, 5.0%. JB/T 9575--1999
5.15 Effect of changes in auxiliary excitation on performance When the auxiliary excitation is the standard limit value of the nominal range specified in Table 2 of 5.2 of this standard, the consistency of the product's action setting value and action time (delay) and the variation of the average error shall be specified by the enterprise product standard. The absolute value of the variation shall be selected from the following data or specified by the enterprise standard:
0.5%, 1.0%, 1.5%, 2.5%, 5.0%5.16 Thermal performance
5.16.1 Temperature rise
When the ambient temperature is 40℃, the product shall be able to work for a long time when an input excitation of 1:1 times the rated value is applied (for electromagnetic products, it is the long-term allowable current) without causing thermal damage to the insulation or other electrical components. The coil temperature rise shall not exceed 65K (or specified by the enterprise product standard).
For heating elements that work with power for a long time, such as resistors, voltage regulators, etc., the maximum temperature shall not exceed 150℃. And it will not cause harmful thermal effects on adjacent components. 5.16.2 Extreme short-time withstand value (i.e. short-time thermal stability) products (electromagnetic products with current coils in series) should be able to withstand 10 times the rated current (or as specified by the enterprise product standard) or the maximum action setting current value for 1s without damage to insulation and other components. After that, when the product returns to normal conditions, its performance should still meet the requirements of 5.5~5.10 of this standard. 5.17 Extreme dynamic stability
The input excitation circuit of the product should be able to withstand a peak value of 2.5 times the extreme short-time withstand value specified in 5.16.2 of this standard (the maximum current peak value does not exceed 250A) for a duration of 10ms. After that, the product should have no insulation damage, the coils and structural parts should have no permanent mechanical deformation, and the product performance should still meet the requirements of 5.5~5.10 and 5.18.1 of this standard. 5.18 Insulation performance
If there are no other provisions, the insulation performance of the product should be tested under dry and non-self-heating conditions. 5.18.1 Insulation resistance
The insulation resistance between each circuit of the product and the ground (i.e. the metal casing or exposed non-live metal parts), and between each circuit in the product without electrical connection, shall be measured with a test instrument with an open circuit voltage of 500V, and shall not be less than 100MQ (for devices) or 300MQ (for relays).
5.18.2 Dielectric strength
The insulation resistance between each circuit of the product and the ground (i.e. the metal casing or exposed non-live metal parts), and between each circuit in the product without electrical connection, shall be able to withstand an AC test voltage of 2kV (effective value) with a frequency of 50Hz for 1min without insulation breakdown or flashover.
When rechecking the dielectric strength, the test voltage value shall be 75% of the specified value. During the factory test, the test duration is allowed to be shortened to 1s, but the test voltage value should be increased by 10% at this time. 5.18.3 Impulse voltage
The circuits of the product and the ground (i.e. the metal casing or exposed non-live metal parts), as well as the circuits without electrical connection, should be able to withstand the short-term impulse voltage test of the standard lightning wave. The test voltage value and the test voltage value that each part should withstand should be in accordance with 8.2 and Appendix D of GB/T14598.3-1993 according to the different places of use of the product. 120
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After the impulse voltage test, the product should meet the requirements of 5.6~5.10 of this standard. During the test, flashover that does not damage the insulation is allowed. If flashover occurs, the insulation resistance and dielectric strength should be rechecked. At this time, the dielectric strength test voltage value is 75% of the specified value. 5.19 Resistance to moisture and heat
The product is subjected to an alternating moisture and heat test at a maximum temperature of 40°C and a test cycle of two cycles (48 hours). Within 2 hours before the end of the test, the insulation resistance values of the parts specified in 5.18.1 of this standard are measured using a test instrument with an open circuit voltage of 500V. The values shall not be less than 1.5M2 (for devices) or 4M2 (for relays). The dielectric strength between each circuit and the ground (metal casing or exposed non-live metal parts) shall be 75% of the specified test voltage value.
5.20. Contact performance
5.20.1 The output circuit contacts of the product should be able to disconnect the DC inductive load circuit with a voltage not greater than 250V, a current not greater than 0.2 (0.5, 2, 5) A, and a time constant of 5±0.75ms or 40±6ms, and the AC circuit with a voltage not greater than 250V and a current not greater than 0.5 (1, 5, 10) A (cos = 0.4±0.1). The contact disconnection capacity shall be specified by the enterprise product standards. 5.20.2 The connection and disconnection of the contacts of electromagnetic products should be reliable, and there should be no stagnation during the action and return process. 5.20.3 When the action value is applied to the coil of the electromagnetic product, the normally closed contact should be able to close reliably and without jitter when connecting the AC and DC load circuits. The normally closed contact or normally open contact with double breakpoints should ensure the simultaneity of the connection and disconnection of the two breakpoints. 5.20.4 The electrical life is 10 times.
5.21 Ability to withstand vibration response
The product should be able to withstand the vibration response test with a severity level of 1 as specified in GB/T11287. During the test, the product input excitation amount and the severity level that it should be able to withstand and the qualified criterion shall be specified by the enterprise product standard. 5.22 Ability to withstand vibration endurance
The product should be able to withstand the vibration endurance test with a severity level of 1 as specified in GB/T11287. After the test, the product qualification criterion shall be specified by the enterprise product standard.
5.23 Impact response capability
The product should be able to withstand the impact response test of the severity level 1 specified in GB/T14537. During the test, the input excitation of the product and the severity level it should be able to withstand and the qualification criteria shall be specified by the enterprise product standards. 5.24 Punch tooth endurance capability
The product should be able to withstand the impact endurance test of the severity level 1 specified in GB/T14537. After the test, the product qualification criteria shall be specified by the enterprise product standards.
5.25 Collision capability
The product should be able to withstand the collision test of the severity level 1 specified in GB/T14537. After the test, the product qualification criteria shall be specified by the enterprise product standards.
5.26 1MHz pulse group interference capability
Static products should be able to withstand the test of 1MHz and 100kHz attenuated oscillation waves specified in GB/T14598.13. During the test, the excitation amount of the product input and the qualified criterion shall be specified by the enterprise product standard. 5.27 Ability to withstand electrostatic discharge interference
Static products shall be able to withstand the test voltage of the severity level Ⅲ specified in GB/T14598.14. During the test, the excitation amount applied to the product shall be specified by the enterprise product standard. The product shall not malfunction under the specified conditions, but the indicator is allowed to give a transient error message. After the test, no components are damaged and the performance shall meet the requirements of 5.6~5.10. 121
5.28 Ability to withstand radiated electromagnetic field interference
JB/T9575-1999
Static products shall be able to withstand the test of the severity level Ⅲ specified in GB/T14598.9. During the test, the excitation amount applied to the product shall be specified by the enterprise product standard. The product shall not malfunction under the specified conditions, but the indicator is allowed to give a transient error message. After the test, the performance shall meet the requirements of 5.6~5.10.
5.29 Capability to withstand fast transient interference
Static products should be able to withstand the test of the sub-grade severity level specified in GB/T14598.10. During the test, the product excitation quantity is specified by the enterprise product standard. The product should not malfunction or refuse to operate under the specified conditions, but the indicator is allowed to give instantaneous error information. After the test, the main performance meets the requirements of 5.6~5.10. 5.30 Interruption of DC auxiliary excitation quantity
The interruption time and qualified criterion of DC auxiliary excitation quantity are specified in GB/T8367 by the enterprise product standard. 5.31 Mechanical life
The product contact circuit should be able to operate reliably for not less than 10 times without load. For products with electromagnetic relays in the output circuit, if the electromagnetic relay has been tested and proved to meet the mechanical life requirements of the product, the product does not need to undergo mechanical life test. 5.32 Structural and appearance requirements
Specified by the enterprise product standard. Www.bzxZ.net
6 Test methods
6.1 Test conditions
The test conditions shall comply with the provisions of 3.1.2 and 3.2.2 of GB/T7261-1987. 6.2 Structural and appearance inspection
The structural and appearance inspection of the product shall be carried out in accordance with the provisions of Chapter 4 of GB/T7261-1987. 6.3 When testing 5.4 of this standard (extreme range limit of ambient temperature), it shall be carried out in accordance with the provisions of Method 2 of Chapter 22 of GB/T7261-87. 6.4 When testing 5.5 of this standard (setting range of operating current), the positive sequence and negative sequence current relays and protection devices shall be tested according to the wiring in Figure 1, and the other products shall be tested in accordance with the methods specified in Chapter 7 of GB/T7261-1987. 6.5 When testing 5.6 of this standard (average error of action setting value), the positive sequence and negative sequence current relay and protection device test shall be checked according to the wiring diagram of Figure 1, and the other products shall be carried out according to the method specified in Chapter 7 of GB/T7261-1987. 6.6 When testing 5.7 of this standard (consistency of action value), the positive sequence and negative sequence current relay and protection device test shall be checked according to the wiring diagram of Figure 1, and the other products shall be carried out according to the method specified in Chapter 7 of GB/T7261-1987. 6.7 When testing 5.8 of this standard (action time and delay setting range), 5.9 (consistency of action time), and 5.10 (average error of delay setting value), the method specified in Chapter 8 of GB/T7261-1987 shall be followed: 6.8 When testing 5.11 of this standard (return coefficient), the positive sequence and negative sequence current relay and protection device test shall be checked according to the wiring diagram of Figure 1, and the other products shall be carried out according to the method specified in Chapter 7 of GB/T7261-1987. 122
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Tested product
S-switch; R-adjustable resistor; P-AC ammeterFigure 1 Wiring diagram for positive (or negative) current relay and protection device action and return testThe three-phase method (as shown in the figure) and the two-phase (or single-phase) method can be used to test the action value and return value. When the three-phase method is used, the wiring is done according to the figure above, and three-phase symmetrical positive sequence (or negative sequence) current is added to the three input terminals of the product for testing; when the two-phase method is used, the three phase-to-phase short circuits of AB, BC, and CA are simulated at the same setting point of the product, and the AC current is passed through the corresponding terminals for testing. At this time, the current value read by the ammeter in the figure above is V3 times the positive sequence (or negative sequence) action current. When simulating three single-phase (AO, BO, CO) short circuits for testing, AC current is passed through the corresponding terminals respectively, and the action current is one third of the current passed. 6.9 When testing 5.12 (reliability during operation) of this standard, the method of suddenly changing the product input excitation quantity is adopted. A DC intermediate relay with an operating time of no more than 10ms is connected in series in the contact circuit of the tested product to observe whether the intermediate relay operates without jitter to check the working reliability of the contact (test 3 times continuously at the same set point). 6.10 When testing 5.13 (power consumption) of this standard, it shall be carried out in accordance with the provisions of Chapter 10 of GB/T7261-1987. When testing 5.14 (the influence of ambient temperature changes on performance) of this standard, it shall be carried out in accordance with the provisions of Chapter 12 and Chapter 13 of GB/T7261-1987. The action value and action time shall be reviewed in accordance with the methods of 6.4 and 6.5 of this standard. 6.12 When testing 5.15 (the influence of changes in auxiliary excitation quantity on performance) of this standard, it shall be carried out in accordance with the provisions of 15.1 and 15.2 of GB/T7261-1987.
When testing 5.16.1 (temperature rise) of this standard, the test shall be carried out in accordance with the provisions of Chapter 11 of GB/T7261-1987. 6.14
When testing 5.16.2 (limit short-time withstand value) of this standard, the test shall be carried out in accordance with the provisions of Chapter 23 of GB/T7261-1987. When testing 5.17 (limit dynamic stability) of this standard, the test shall be carried out in accordance with the provisions of Chapter 23 of GB/T7261--1987. 6.15
When testing 5.18 (insulation performance) of this standard, the test shall be carried out in accordance with the provisions of Chapter 20 of GB/T7261-1987. 6.17
When testing 5.19 (moisture and heat resistance) of this standard, the test shall be carried out in accordance with the provisions of GB/T2423.4. 6.18
When testing 5.20 (contact performance) of this standard, the provisions of Chapter 24 of GB/T72611987 shall apply. 6.19
When testing 5.21 (vibration response capability) and 5.22 (vibration endurance capability) of this standard, the provisions of GB/T11287 shall apply. When testing 5.23 (impact response capability) and 5.24 (impact endurance capability) and 5.25 (collision capability) of this standard, the provisions of GB/T14537 shall apply.
When testing 5.26 (1MHz pulse group interference capability) of this standard, the provisions of GB/T14598.13 shall apply. 6.21
When testing 5.27 (electrostatic discharge interference capability) of this standard, the provisions of GB/T14598.14 shall apply. 6.22
When testing 5.28 of this standard (ability to withstand radiated electromagnetic field interference), the requirements of GB/T14598.9 shall apply. 6.23
When testing 5.29 (ability to withstand fast transient interference) of this standard, the provisions of GB/T14598.10 shall apply. 6.25
When testing 5.30 (interruption of DC auxiliary excitation quantity) of this standard, the provisions of Chapter 15 of GB/T7261-1987 shall apply. When testing 5.31 (mechanical life) of this standard, the provisions of Chapter 25 of GB/T7261-1987 shall apply. 6.26
Inspection rules
The enterprise product standard shall be in accordance with: GB/T1.3-
Marking, instruction manual
JB/T 9575--1999
-1997, 5.4.6.
The enterprise product standard shall be in accordance with: GB/T1.3--1997, 5.4.7. 9
Packaging, transportation, purchase and storage
The enterprise product standards shall be in accordance with the provisions of GB/T7828:. 124
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