This standard specifies the terms, symbols, codes, product models, specifications, markings, normal working conditions and installation conditions, technical requirements, test methods and inspection rules of HK series switch fuse groups (load switches) (hereinafter referred to as switches). This standard applies to the main switch in the circuit with an AC frequency of 50 Hz, a rated voltage of single-phase 220 V, three-phase 380 V, and a rated current of up to 63 A: branch switches and operating switches such as electric lights and electric heaters, which are used as switches for manually connecting and disconnecting load circuits and short-circuit protection of small-capacity lines infrequently. JB/T 10185-2000 Switch fuse group (load switch) JB/T10185-2000 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T10185
Ti·(
2000-04-24
Wa Xian Ji Dong
Chu Kou)
2000-10-01
JB/T101852000
This standard is formulated based on the relevant technical content of GB14048.3-1993 "Low-voltage switchgear and control equipment low-voltage switch, isolator, disconnector and fuse combination electrical appliances". Through the formulation of this standard, the HK series switch fuse group (load switch) products have a unified industry standard to meet the needs of domestic and foreign trade, technology and economic exchanges and development. This standard is published for the first time.
This standard is proposed and managed by the National Technical Committee for Standardization of Low Voltage Electrical Appliances. The drafting units of this standard: Shanghai Heping Switch Factory and Shanghai Dacheng Electric Company. The main drafters of this standard are Chen Jiyao, Li Jianying, Shao Zhiren, Jiang Jie, Liu Jinghai and Zhang Genyun. 2000-04-24 2000-04-24 2000-01-01 2000-01-01 2000-02-03 2000-02-04 2000-02-05 2000-02-06 2000-02-07 2000-02-08 2000-02-09 ... 3.1.2 Except as provided for in 3.1.1, this standard refers to the terms and definitions related to this standard in GB/2900.18. 3.2 Symbols and codes
3.2.1 Symbols
The main symbols used in this standard are as follows: Ue
Rated working voltage
Power frequency recovery voltage
Voltage before connection
Rated working current
Breaking current (or connection and breaking current) Connection current
Power factor
Comparative tracking index
Alternating damp heat test
Enclosure protection grade
3.2.2 Utilization category code
According to the rated voltage value of the switch, the following usage category code is selected. 220V is AC-22A for switching mixed loads of resistance and inductance, including appropriate overloads: 380V is AC-21A for switching resistive loads, including appropriate overloads. 4 Product models and specifications
4.1 Product models and their meanings
Rated working current
Design code
Switch fuse group (load switch)
4.2 Basic parameters
4.2.1 The rated working voltage (rated insulation voltage) is single-phase 220V and three-phase 380V. 4.2.2 The rated working current (rated heating current) has five current levels of 6A, 10A, 16A, 32A, and 63A. 4.3 Classification
4.3.1 According to the structure
a) Central hand-operated type:
b) Central handle self-locking type. Www.bzxZ.net
4.3.2 Classification by number of poles
a) Two poles:
b) Three poles.
5 Marking
JB/T101852000
Each switch shall be marked with a nameplate in a conspicuous position. The mark shall be clear, easy to identify, and indelible. The mark shall indicate the following:
a) Product model:
b) Rated working voltage:
c) Rated working current;
d) Name or trademark of the manufacturer;
e) Opening and closing position:
f) Terminal mark.
Should comply with the relevant provisions of GB/T4026.
6 Normal working conditions and installation conditions
6.1 Normal working conditions
6.1.1 Surrounding air temperature
6.1.1.1 Upper limit, not exceeding +40℃:6.1. 1.2 Lower limit, not exceeding -5℃:
6.1.1.3 Average value within 24h, not exceeding +35℃:6.1.2 Tidal elevation
The altitude of the installation site shall not exceed 2000m.
6.1.3 Atmospheric conditions
The relative humidity of the air at the installation site shall not exceed 50% when the maximum temperature is +40℃: Higher relative humidity is allowed at lower temperatures, the average minimum temperature of the wettest month shall not exceed +25℃, and the average maximum relative humidity of the month shall not exceed 90%. Measures must be taken for condensation on the product due to temperature changes. 6.1.4 Pollution level
The pollution level of the environment around the switch is level 3. 6.1.5 Installation category
The installation category of the switch is Class IⅡI.
6. 2 Installation conditions
The switch should be installed in accordance with the requirements of the operating instructions provided by the manufacturer. 3
7 Technical requirements
7.1 Structural requirements
JB/T101852000
7.1.1 The switch should comply with this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 7.1.2 The structural materials of the switch should meet the relevant use requirements and pass the corresponding verification, including terminal and mechanical strength performance tests, heat tests, fire hazard tests, and insulation material determination of its comparative tracking index (CTI value) test. 7.1.3 The insulation material group used in the switch should not be inferior to IIb, that is, 100≤CTI<175, and the surface of the parts should have a good appearance. A small number of defects are allowed, but they cannot affect the performance of the switch. 7.1.4 The minimum electrical clearance and creepage distance of the switch are shown in Table 1. Table 1 Minimum electrical clearance and creepage distance
Electrical clearance
7.1.5 The screws used for fastening the switch shall not be loose or automatically loosened.
7.1.6 The contact blade and the contact of the switch shall be able to connect or disconnect at the same time, and the contact synchronization error shall be less than or equal to 1.5mm. 7.1.7 The length of the contact mark between the contact blade and the contact of the switch shall reach three-quarters of the width of the contact (superimposed calculation). 7.1.8 The live fastening screw holes on the switch base shall be covered with heat-resistant insulating materials. 7.1.9 All ferrous metal parts on the switch shall have an anti-corrosion layer. n
7.1.10 The riveted joints between the contact blade and the bracket of the switch and the contact joints of the contact blade and the contact shall be coated with uneven oil, and the riveted force of the support shall be appropriate. The riveted joints shall rotate flexibly.
7.1.11 The structure of the switch terminal should compress the wire between the appropriate contact surfaces without damaging the wire and the terminal. It should be connected to the conductor to ensure that the necessary contact pressure is maintained permanently. The terminal should be easy to enter and wire when installing external wires. Its screws and nuts should not be used to fix any other parts. 7.1.12 The switch terminal should be reliably connected to the conductor, and its mechanical strength should be able to withstand the provisions of Table 3. After the test, there should be no damage that affects continued use. For example, damage to the screw or the groove of the screw head, thread, washer, boring part, etc. will affect the continued use of the threaded connection. The capacity of the connecting wire shall be in accordance with the provisions of Table 2. Table 2 Cross-section of connecting wires
6, 10
Cross-section of round copper wires
Terminal screw diameter
JB/T101852000
Table 3 Mechanical strength of wiring terminals
Tightening torque
7.1.13 The structure and casing of the switch should have good protection against electric shock. Except for the holes necessary for work and use, no holes should be opened at will. The standard test finger should not touch the exposed live parts of the switch to ensure that the user does not have accidental electric contact. The protection level is represented by IP2x.
7.2 Performance requirements
1.2.1 Fusing characteristics
According to the requirements of GB[3539,[一19928,4, the switch is operated in the ambient air temperature range of 20±5℃, the fuse of the switch is passed with the agreed non-fusing current (1.25I.), it should not be blown within 1h, and passed with the agreed fusing current (1.6I), it should be blown within 1h. During the test, the poles of the switch are connected in series and passed with single-phase alternating current. New fuses are used respectively. The fuses are in accordance with the provisions of Appendix A. 7. 2.2 Heat resistance
should be verified on the entire switch: the switch should be placed in a heating box (box) at a temperature of 100±2°C for a sufficient time to reach thermal equilibrium, but not less than 1 hour, then take the tested switch out of the test room (box) and let it cool to near room temperature, check whether the insulating parts have serious deformation, softening, blistering, cracks, and failures that hinder its use. The insulating filler is not allowed to have melt flow. 1.2.3 Low humidity performance
The switch is tested at -25±3℃ for 16h. After the test, the test sample is taken out and restored under normal atmospheric conditions until the temperature reaches stability (the recovery time shall not be less than 1h), and there shall be no visible or obvious cracks, damage or deformation. 7.2.4 Moisture and heat resistance performance
The switch shall be able to withstand the severe vinegar level of high temperature +40℃ test period 6 days and nights test Db: alternating damp heat test, the measured insulation resistance shall not be less than 1.0 M2. Before the test of the switch under test is completed, a T-frequency withstand voltage test of 80% of the power frequency withstand voltage value specified in Table 6 for 1 min shall be carried out, and there shall be no insulation breakdown or flash phenomenon.
7.2.5 Operating tension
The switch shall be flexible to operate, and its operating tension shall be within the specified range shown in Table 4. Table 4 Operating tension
Operating tension
1.96~13.7
19.6-78.5
7.2.6 Temperature rise
JB/T101852000
And closed in the ambient air temperature range of +10℃ to 40℃ and its change should not exceed 10K. When the temperature change per hour does not exceed 1K, the temperature rise can be considered to be stable. When the rated working current is used for testing, the measured temperature rise of each part should not exceed the specified values ​​in Table 5. Table 5 Allowable value of temperature rise
Measurement location
Terminal
7.2.7 Dielectric properties
Material category
Insulating material
Nude yellow
Temperature rise limit
The switch must be able to withstand the power frequency withstand voltage test values ​​shown in Table 6, and the test lasts for 1 minute without breakdown or flashover. 6 Power frequency withstand voltage test values
7.2.8 Rated making and breaking capacity
The rated making and breaking capacity of the switch shall meet the requirements of Table 7. Table 7 Rated making and breaking capacity
7.2.9 Operational performance
The operating performance of the switch shall meet the requirements of Table 8. 0
7.2.10 Rated limiting short-circuit current
Table 8 Operating performance
Number of operating cycles per hour
Test voltage (AC effective value)
Number of operating cycles
Number of cycles
The rated limiting short-circuit current of the switch is in the voltage range of AC 50Hz, 1.1U, ±5%, and the fuse breaking limiting short-circuit current of the switch shall comply with the provisions of 6
Combined with Table 9.
8 Test method
1 Test to verify structural requirements
8. 1. 1 General inspection
a) Visual inspection of the marking on the switch nameplate
Result judgment after test:
The inspection of this item shall comply with the provisions of 5.
b) Visually check whether the switch parts are complete. Result judgment after test:
This daily inspection shall comply with the provisions of 7.1.1. JB/T101852000
Table 9 Rated limiting short-circuit current
6, 10
Test current
c Use a vernier caliper with an accuracy of 0.02mm to check the electrical clearance and creepage distance of the switch. Result judgment after test:
This item of inspection shall comply with the provisions of 7.1.4. d) Use an indicating device and a dial indicator to check the contact synchronization of the switch. Result judgment after test:
This item of inspection shall comply with the provisions of 7.1.6. e) Use a vernier caliper with an accuracy of 0.02mm to check the length of the switch contact trace. Result judgment after test:
This item of inspection shall comply with the provisions of 7.1.7. Use visual and manual inspection to check the appearance quality of the switch. Result judgment after test:
The inspection of this item shall comply with the provisions of 7.1.3, 7.1.5, 7.1.8~7.1.11. 8. 1. 2 Heat resistance test
Test in accordance with 8.1.3.1 of GB/T14048.1-1993. Result judgment after test:
The inspection of this item shall comply with the provisions of 7.2.2. 7
0.95±0.05
Number of tests
8.1. 3 Low temperature resistance test
Test in accordance with 9 of GB/T2423.1-1993. Result judgment after test:
The inspection of this item shall comply with the provisions of 7.2.3. 8.1.4 Moisture and heat resistance test
JB/T101852000
Test according to 8.1.2 of GB/T 14048.1-1993. Result judgment after test:
The inspection of this item shall comply with the provisions of 7.2.4. 8.1.5 Operation tension test
The switch shall be installed in the normal position so that it is in the fully connected state. The force point is taken from the end of its handle (at the maximum torque) and the direction is perpendicular to the handle. Before the measurement, the switch is opened and closed 5 times continuously, and then measured with a spring dynamometer with an appropriate range. The same switch is tested 3 times in a row, and the average value of the 3 times is used to represent the operating tension of the switch. Result judgment after test:
The test of this item shall comply with the provisions of 7.2.5. 8.1.6 Comparative tracking index test According to the requirements of 2.3 of GB/T4207--1984, the maximum external applied voltage value of the test sample without tracking after being subjected to 50 drops of ammonium chloride standard electrolyte.
Result judgment after test:
After the test of this project, the CTI value measured for the switch of material group ⅢIb is ≥100. B.1.7 Anti-electric shock protection test
According to the requirements of 6 of GB/4942.2-1993, the protection level characterization symbol is P2X. Result judgment after test:
The test of this project should comply with the provisions of 7.1.13. 8.1.8 Fire hazard test
According to the requirements of GB/T5169.4, the test temperature of the top of the glow wire is 650±10℃ for insulators not in direct contact with the conductor, and 6015℃ for those in direct contact with the conductor, and the time is 30±1s. Judgment of the results after the test:
The test of this project should comply with the relevant provisions of GB, T5169.4. 8.1.9 Mechanical strength test of the terminal
According to the provisions of Table 2 of this standard, the wires should be correctly connected. Each terminal should be connected and removed for 5 times. The tightening torque should be tested according to the value specified in Table 3. The test time is 1min. This test should be carried out on two terminals separately. Each time the clamping screw is loosened, the next tightening test should use a broken conductor, and the clamping piece and the terminal should not be loosened. Judgment of the results after the test:
The inspection of this project should comply with the provisions of 7.1.12. 8.1.10 Fusing characteristic test
Test according to 8.4 of GB13539.1-1992, and the fuse for test shall be in accordance with Appendix A. Judgment of test results:
The inspection of this item shall comply with the provisions of 7.2.1. 8.2 Performance test
Switch performance test items
a) Temperature rise;
b) Temperature rise verification:
e) Dielectric performance:
d) Full-electric performance verification;
e) Rated making and breaking capacity:
Operation performance:
g) Rated short-circuit current.
8. 2. 1 Test procedure
JB/T101852000
The performance tests, as shown in Table 10, are combined into several test procedures. For each test procedure, the test must be carried out on the same test product in the order listed in the table and in accordance with the requirements of the corresponding competition clauses. Table 10 Overall arrangement of the test procedure
General characteristics
See (8.2.3 and Table 11)
Operating performance
See (8.2.4 and Table 13)
Rated conditional short-circuit current
See (8.2.5 and Table 14)
8.2.2 General conditions for tests
8.2.2.1 General requirements
Uniform electrical performance
Rated connecting and breaking capacity
Dielectric properties check
Temperature rise check
Operating performance
Dielectric properties check
Mixed rise check
Rated conditional short-circuit current
Dielectric properties check
Temperature rise check
The provisions of 7.1.1 are applicable to all type tests. At the beginning of any test procedure, the switch must be new and clean. The parts and components of the switch are generally not allowed to be repaired or replaced. The switch can usually be operated several times before the test begins. The installation and wiring of the tested switch should be consistent with the normal use of the switch, according to the environmental conditions specified in Article 6 of this standard and the product test instructions.
8.2.2.2 Evaluation of results
The performance of the switch during the test and the state of the switch after the test are specified in the relevant chapters. 8.2.2.3 Test report
According to 8.2.2.4 of GB/T 14048.1-1993. 9
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