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Mechanical Industry Standard of the People's Republic of China
JB/T7434-94
Solenoid Plug Socket for Valve
1994-09-06 Issued
Ministry of Machinery Industry of the People's Republic of China
1995-07-01 Implementation
Mechanical Industry Standard of the People's Republic of China
Solenoid Plug Socket for Valve
JB/T 7434-94
This standard refers to the international standards ISO4400-85 Fluid power systems and components-three-pin power plug socket-characteristics and requirements" and ISO6952-89% Fluid power systems and components-two-pin power plug socket-characteristics and requirements". 1 Subject content and scope of application
This standard specifies the type, parameters, technical requirements, test methods and inspection rules of plug sockets for valve solenoids (hereinafter referred to as plug sockets).
This standard applies to plugs and sockets used to connect valve solenoids to hydraulic and pneumatic control components in circuits with an AC 50/60Hz voltage of up to 380V and a DC voltage of up to 220V. This standard does not apply to plugs and sockets that operate under power-on conditions. Reference standards
GB1497
GB2828
GB2900.18
GB4207
GB 5169.4
GB5226
GB/T14048.1
3 Terms, symbols and codes
Basic test methods for low-voltage electrical appliances
Basic standards for low-voltage electrical appliances
Basic environmental test procedures for electric and electronic products Test Db: Alternating damp heat test method Batch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches) Electrical terms low-voltage electrical appliances
Determination method of comparative tracking index and proof tracking index of solid insulating materials under humid conditions Protection grade of low-voltage electrical appliance enclosure
Fire hazard test for electric and electronic products
Glow-wire test method and guidelines
General technical conditions for industrial machinery and electrical equipment General provisions for low-voltage switchgear and controlgear
Except as specified in this standard, the terms, symbols and codes shall comply with the provisions of GB2900.18 and CB1497. 3.1
3.2 Plug socket: It consists of two parts, the plug and the socket. When connected, it can be continuously powered. 4 Type, basic parameters and dimensions
4.1 Type
4.1.1 The plug socket consists of two parts, the plug and the socket (see Figure 1) 4.1.2 The thread of the socket reference hole and the locking nut is M18X×1.5 for the three-pin type and M16×1.5 for the two-pin type. The diameter of the terminal connection hole is not less than 2.5m.
4.1.3 The position, size and marking of the plug pin and the grounding pin shall generally conform to Figure 2. It is recommended to adopt the provisions of Figure 3. Approved by the Ministry of Machinery Industry on September 6, 1994
Implementation on July 1, 1995
JB/T 7434--94
1—Plug: -Socket: 1-Grounding pin: 2-Pin 13-Fastening screw: 4 Sealing pad Three-pin plug socket
Two-pin plug socket
.8±0.10
a Pin size
JB/T 743494
4.2 Model and its meaning
ACFO-OO/OO
b Grounding foot size
Socket color: H: black; U: gray
Voltage level
Derived code, basic type without derived code D: with light
Q: with full-wave rectifier
B; with half-wave rectifier
R: Full-wave rectifier with light
S: Half-wave rectifier with light
Basic specification code: 2: two-pin: 3: three-pin Design serial number
Valve electromagnet
Plug socket
4.3 Basic parameters
Rated working voltage: AC 380, 220, 110V; DC: 220, 110, 36.24, 12V; Connector heating current agreed: 10A.
Technical requirements
Normal working conditions and installation conditions
Ambient air temperature
The upper limit of the ambient air temperature shall not exceed 1040C; the average value of the ambient air temperature for 24h shall not exceed +35℃: the lower limit of the ambient air temperature is -5C.
The altitude of the installation site shall not exceed 2000m.
5.1.3 Atmospheric conditions
JB/T 7434·94
The relative condensation of the atmosphere shall not exceed 50% when the ambient air temperature is +40℃: higher relative humidity can be achieved at lower temperatures. The average maximum relative humidity of the wettest month is 80%, and the average minimum temperature of the month is +25℃, taking into account the condensation on the product surface due to temperature changes.
5.1.4 Pollution level
The pollution level of the plug socket is level 2.
5.1.5 Installation category
The installation category of the plug socket is "level.
5.1.6 Rated working system
The plug socket is suitable for uninterrupted working system.
5.2 Structural requirements
5.2.1 Assembly quality
When the plug is fully inserted, it is fastened with screws. It should not be loose in normal use, and it must be removed with the help of tools to expose the internal a.
Live parts:
The plug pins and grounding pins are fixed on the plug. When plugging, it should be ensured that they are reliably grounded before the power is turned on. There is an obvious grounding mark near the grounding pin of the plug:
A sealing pad should be added to the socket to ensure that the plug and socket are assembled. The sealing performance is good, and its external dimensions are recommended to be as shown in Figure 4. 26.5
Appearance quality
The plastic surface should be free of bubbles, cracks, missing materials, deformation, scratches, and burrs; metal parts should have an anti-corrosion protective layer, and the protective layer should not have defects such as peeling and peeling: the surface of conductive parts should be smooth, free of burrs and corrosion marks; the screws should not be loose or automatically loose at the joints. Electrical clearance and creepage distance
The electrical clearance of the plug socket shall not be less than 1.5mm;
The minimum creepage distance of the plug socket shall comply with the provisions of Table 1. Table 1
Kai Ding insulation voltage
The sealing part of the first socket
5.2.4 Comparative tracking index
JB/T 7434—94
Insulating material groups can be divided into the following four groups according to their comparative tracking index (CT1) values: Insulating material group 1; CTI600
Insulating material group I: 600>CTI≥400
Insulating material group a: 400>CTI≥175
Insulating material group b, 175.>CTI>100
5.2.5 Aging resistance
Rubber seals are placed in an environment with a temperature of 70±2°C. After 10 days, the test piece has no surface cracking or shrinkage, especially the material becomes sticky or oily.
5.2.6 Resistance to abnormal heat and fire hazard
Insulating material components should have the performance of resisting abnormal heat and pass the fire hazard test. 5.2 .7 Shell protection level
The shell protection level of the plug socket is IP65.
5.2.8 Drop
After the plug socket is dropped 10 times at a height of 1m from the ground with the conductor, no loose, detached or cracked parts should be found. 5.2.9 Impact resistance
The insulating shell of the plug socket should be able to withstand a 0.15kg pendulum and hit 5 times at a certain vertical height (250mm for the plug and 150mm for the socket) without visible cracks. 5.3 Performance requirements
5.3.1 Dielectric performance
The insulation between the pins of the plug socket (pin to ground, conductive pin to ground pin) should be able to withstand the voltage value specified in GB/T14048 and the 1-minute power frequency withstand voltage test without breakdown or flashover. 5.3.2 Insulation resistance
The insulation resistance between the pins of the plug socket and between the pins and the shell should be no less than 100Mα. 5.3.3 Moisture resistance
The plug socket should be able to adapt to mixed heat environment, and the test severity level is the highest temperature + 40C. The test cycle is 6 days. Its insulation resistance is not less than 1MQ and can withstand 80% of the value specified in Article 5.3.1, and the power frequency withstand voltage test lasting 1min. 5.3.4 Contact resistance
The contact resistance between the grounding pins after embracing is not greater than 0.08α. The contact resistance of any two pairs of pins connected is not greater than 0.15. 5.3.5 Plug-in life
Under normal working conditions, after 50 plug-in operations, the plug socket should meet the requirements of Articles 5.3.1, 5.3.4, and 5.3.6 Insertion and extraction force
The force of inserting and removing the plug from the entire socket (three pins + ground pin) should not exceed 80N, and (two pins + ground pin) should not exceed 60N. 5.3.7 Low temperature resistance
The plug socket is placed in a low temperature box at a temperature of -25℃. After 16 hours, the plastic parts should have no visible cracks or cracks. 5.3.8 High temperature resistance
The plug socket is placed in an environment with a temperature of 115±2℃. After 4 days, the plastic parts should not deform, crack or soften. 5.3.9 Oil resistance
The plug socket is placed in N100, No. 32 ordinary hydraulic oil at a temperature of 23±2℃. After 16 hours, the surface of plastic and rubber parts shall not become sticky, soften or swell, and shall comply with the provisions of Article 5.3.1. 5.3.10 Contact performance
The plug socket is installed on the electromagnet of the corresponding model, and the power is turned on (the DC power supply should be connected arbitrarily, regardless of polarity) and operated continuously for 20 times. The electromagnet can work normally and the indicator light can indicate normally. 5
6 Test method
Basic requirements
JB/T 7434 - 94
6.1.1 Plug socket test method Except for the provisions of this standard, the rest shall be carried out in accordance with the provisions of GB998 and GB1497. 6.1.2 Each test or each completed sequential test shall be carried out on a new and clean product. 6.2 Verification structure requirements
General inspection
Use visual inspection to inspect the plug socket's markings, grounding markings, plastic parts, conductive parts, and appearance quality; the plug socket assembly quality, electrical clearance, creepage distance, pin position, size, etc. can be inspected using a 0-125mm vernier caliper. The accuracy is 0.02mm.
6.2.2 Determination of comparative tracking index value The determination of the comparative tracking index (CTI) value of insulating materials shall be carried out in accordance with GB4207. 6.2.3 Aging resistance test
The plug socket is placed in a test room with the same atmospheric pressure and composition as the surrounding air, with natural circulation ventilation and a room temperature of 70±2℃. After 10 days, the test piece is placed in an environment with a relative humidity of 45%-55% for no less than 1 day and shall meet the requirements of Article 5.2.5. 6.2.4 The test of resistance to abnormal heat and fire hazard is carried out in accordance with the relevant provisions of GB5169.4, using the test temperature of 960℃ at the top of the glow wire, and the test duration is 301$. 6.2.5 Shell protection level test
The plug socket is installed on the corresponding electromagnet shell. It is carried out in accordance with Table 3 and Table 4 in GB4942.2. And the pressure resistance test is carried out at 50% of the value specified in Article 5.3.1.
6.2.6 Drop test
During the test, the test piece is hung on the test frame (see Figure 5). The plug socket wire (each wire core cross-sectional area is 0.5mm) is 2250±10mm long. It is dropped freely from a height of 1m to a hard cement flat ground or a steel plate of at least 25mm thick (steel plate area is 300mmX500mm), and it is visually in compliance with the requirements of Article 5.2.8. 6.2.7 Impact test
The specimen is installed on the test stand (see Figure 6). The pendulum dart is made of hardwood and has a hemispherical impact surface with a radius of 10mm. The pendulum handle is made of a steel pipe with an outer diameter of 10mm and a wall thickness of 0.5mm. Its effective length is 1m. After adjusting the height, the five weakest points of the specimen are selected in turn so that the pendulum chain is impacted by the lower pendulum, which meets the requirements of Article 5.2.9. n
2250±10
Water floor and copper plate
JB/T 7434 -- 94
1-positioning pin; 2-swing handle; 3-stall head: 4-test sample; 5-bottom plate (8mm thick plywood); 6-bracket; b impact height 6.3 Verification performance requirements
6.3.1 Power frequency withstand voltage test
Perform according to the provisions of Article 6.3 of GB998, comply with the provisions of Article 5.3.1, and the leakage current is not more than 50mA. 6.3.2 Insulation resistance test
Use 500V megohmmeter to measure between each contact pair and between each contact pair and the shell. Comply with the provisions of Article 5.3.2, 6.3.3 Moisture and heat resistance performance test
Perform according to the provisions of Db: Alternating damp heat test method in GB2423.4, comply with the provisions of Article 5.3.3. 6.3.4 Contact resistance measurement
The test is carried out in accordance with GB5226. A current of 10A is passed through the parts specified in 5.3.4 and then the voltage drop is measured (the cross-section of the connecting wire is 2.5mm\), and the resistance value is calculated based on the current and voltage drop. The resistance value should not exceed the specified value in 5.3.4 (excluding the connection resistance). The test is carried out according to Figure 7. 220V
R-sliding wire resistance; A, V-0.5 grade DC current and voltage meter: X-plug socket 6.3.5 Plug-in life test
The plug socket is fixed in the horizontal working position. It is plugged and unplugged by hand at a speed of 10mm/s (when the plug and socket are separated, they are stationary for 7
JB/T 7434-94
30s). After 50 times, check whether the parts are damaged and whether they meet the requirements of 5.3.1 and 5.3. 6.3.6 Plug-in force measurement test
Measurement of insertion force
Put the socket on the dial table scale and add weight to the plug to make it fully inserted into the socket. Record the table scale reading (minus the weight of the socket), which should not exceed the specified force.
Determination of the pull-out force
Insert the plug into the socket and hang a weight on the plug (the gravity line of the weight is in the same straight line with the central axis of the plug socket). Separate the plug and the socket. The sum of the weight of the weight, the weight of the plug and the weight of the plug should not be greater than the specified force. c. Comply with the provisions of Article 5.3.6.
6.3.7 Low temperature test
Put the plug socket that has been plugged in at the test environment temperature without adding any load, and put it in a test chamber with a temperature stable at -25 (the test time starts from the time when the test piece reaches temperature stability) for 16 hours, then take it out and remove water droplets on the surface of the test piece (the test piece recovers for at least 1 hour). Visual inspection shows that it meets the requirements of Article 5.3.7.
6.3.8 High temperature test
Put the plug socket that has been plugged in at the test environment temperature without adding any load, and put it in a test chamber with a temperature stable at 115±2℃ In the test box (the test time starts from when the test sample reaches temperature stability), the relative humidity does not exceed 50%. After 4 days, take it out (the test sample recovers for at least 1 hour). Visual inspection shows that it meets the requirements of Article 5.3.8.
6.3.9 Oil resistance test
The plug socket (not plugged in) is immersed in No. 32 hydraulic oil at an ambient temperature of 23±2C (the highest point of the test sample is below the oil level) for 16 hours and then take it out. Use light gasoline to flush the oil attached to the test sample. That is, perform the pressure resistance test according to Article 5.3.1. Visual inspection shows that it meets the requirements of Article 5.3. 9 requirements 6.3.10 Contact performance test
Manual operation (on and off) 20 times, in line with the requirements of 5.2.1b., 5.3.10, the test is carried out according to Figure 8. ?
Power supply (
AV-current. Voltage meter: YA-with electric iron: -Indicator light: X-head socket 7
Inspection rules
Plug socket test and inspection classification
Type test;
Periodic test:
Factory inspection: routine inspection ; Factory sampling inspection. .
7.2 Type test
The purpose of type test is to verify whether the design and performance of the plug socket meet the requirements of this standard. The type test of the plug socket is carried out in the following cases:
New products produced on trial or products produced on transfer; a.
When the product is changed in design or the manufacturing process, raw materials used, or parts are changed, which may affect its performance. All h.
or type tests of relevant items are required
JB/T 7434- 94
Type test items and sequence shall be in accordance with the provisions of Table 2. Table 2
Test items
General inspection
a. Assembly quality inspection
b. Connection dimension inspection
c. Appearance quality inspection
d. Marking and packaging inspection
Comparative leakage silver index determination
Aging resistance test
Fire hazard test
Shell protection grade test
Drop test
Impact test
Industrial withstand voltage test
Insulation resistance test
Moisture resistance test
Contact resistance determination
Plug-in life test
Plug-in force determination test
Low temperature test
High temperature test
Oil resistance test
Contact performance test
4. 1. 2.4. 1.3
In order to shorten the test cycle, group testing is allowed. Note:
Type test rules
Test method
Type test
Periodic test
The plug socket used for type test must be a formal sample, and there should be no less than 3 units for each test item. The plug socket can only be considered qualified for type test if all test items can pass and all test items are qualified. If there are errors in the items that do not threaten safety or seriously reduce performance indicators during the type test, as long as the manufacturer can provide sufficient evidence to show that the error is not an inherent defect in the design but a defect in individual test items, it is allowed to retest according to the original number of test items, and the type test is still considered qualified if the retest is qualified. 7.3 Periodic test
Regular test should be carried out for formally produced products, and the regular test is carried out every 3 years. 7.3.1 The items and sequence of regular tests are specified in Table 2. 7.3.2 Rules for periodic tests
Plugs and sockets for periodic tests must be randomly selected from batches of products that have passed factory inspection. Each test item should be no less than 3 units. The periodic test is considered qualified only when all test items and all tested products pass. If only one unit fails one item in the test, the item is allowed to be retested according to the original sampling quantity. If all pass in the retest, the periodic test can still be considered qualified. If one unit fails one item again, the periodic test is considered unqualified.
7.4 Factory inspection wwW.bzxz.Net
7.4.1 Routine inspection
7. 4. 1. 1
Routine inspection items
Assembly quality inspection (5.2.1);
Power frequency withstand voltage test (5.3.1):
Appearance quality inspection (5.2.2);
Marking and packaging inspection (8.1, 8.2).
General inspection rules
7. 4. 1. 2
JB/T7434
General tests are items that must be tested and inspected one by one in the subsequent processes of the plug socket during the production process. Products that fail the general inspection must be returned for repair one by one until they pass completely. If they cannot be repaired, they should be scrapped. 7. 4. 2
Factory sampling inspection
7. 4. 2. 1
Factory sampling inspection items
Electrical clearance and electrical distance (5.2.3); connection dimension inspection [4.1.2, 4.1.3 (excluding Figure 3)]; contact resistance measurement (5.3.4);
insertion force test (5.3.6);
contact performance test (5.3.10).
7.4.2.2 Factory Sampling Inspection Rules
Plug sockets must be sampled and inspected before leaving the factory. Before leaving the factory, each batch of plug sockets shall be randomly sampled and inspected according to the number of samples (n) specified in Table 3. If the number of unqualified units is equal to or less than the qualified judgment number (Ac), the batch of products is qualified; if the number of unqualified units is equal to or greater than the unqualified judgment number (Re), it is considered unqualified. If the number of unqualified units is greater than Ac: and less than Re, another (nz) units of samples shall be sampled and inspected. If the sum of the unqualified numbers of the two tests is equal to or less than Ac2, the batch of products is still qualified; if the sum of the unqualified numbers is equal to or greater than Re2, the batch of products is considered unqualified. Table 3
Batch range
281~500
501~1200
12013200
3201~10000
Marking, packaging, transportation and storage
8.1 Marking
Each plug socket shall be marked with a clear, easily recognizable and indelible mark in a prominent position. It shall not be placed on removable parts. Marking content:
Manufacturer's name or trademark;
Product model or name:
Rated working voltage;
Grounding mark, wiring number;
Product compliance standard number;
Enclosure protection level:
Manufacturer year and month or factory number.
If the available space on the product or label is not sufficient to carry all the above information, at least a, b, c, d should be included on the product or label.
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