This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of flameproof cable connectors for mines. JB/T 5350-1991 Flameproof cable connectors for mines JB/T5350-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB5350-91
Flameproof Cable Connector for Mine
Published on 1991-06-28
Implementation of the Ministry of Machinery and Electronics Industry of the People's Republic of China on 1992-07-01
Mechanical Industry Standard of the People's Republic of China
Flameproof Cable Connector for Mine
1 Subject Content and Scope of Application
JB5350-91
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of flameproof cable connectors for mines (hereinafter referred to as connectors). This standard applies to the design, manufacture and inspection of connectors. Connectors are used to connect two sections of cables and between cables and electrical equipment. 2 Reference standards
General requirements for explosion-proof electrical equipment for explosive atmospheres GB3836.2
GB2706
GB1497
JB2759
3 Product categories
Explosion-proof electrical equipment for explosive atmospheres Flameproof electrical equipment "d" Explosion-proof electrical equipment for explosive atmospheres Increased safety electrical equipment "e\ Heat generation during long-term operation of AC high-voltage electrical appliances High voltage test technology Part 2 Test procedures Dynamic and thermal stability test methods for AC high-voltage electrical appliances Basic test methods for low-voltage electrical appliances
Basic environmental test procedures for electrical and electronic products Test Db: Alternating damp heat test method Basic standards for low-voltage electrical appliances
General technical conditions for packaging of electromechanical products
3 .1 According to basic parameters:
a. Rated voltage: 1140, 6000V,
b. Rated current: 200, 315, 400A. 3.2 According to structure:
a. With auxiliary plugs and sockets;
b. Without auxiliary plugs and sockets.
4 Technical requirements
The connector must comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the inspection unit designated by the state (hereinafter referred to as the inspection unit). It can only be produced after obtaining the explosion-proof certificate issued by the inspection unit. 4.1 Environmental conditions
The connector should be able to work normally under the following conditions: a. The altitude of high-voltage products shall not exceed 1000m, b.
The altitude of low-voltage products shall not exceed 200 0m,
c. The relative humidity of the surrounding environment is not more than 95% (at +25℃), d. The ambient temperature is 20～+40℃, in a place without strong shock and vibration,
In a place without dripping and immersion:
Approved by the Ministry of Machinery and Electronics Industry on June 28, 1991, and implemented on July 1, 1992
JB5350-91
9. In a place without corrosive gases and steam that are sufficient to damage metals and insulation. 4.2 Materials, appearance, structure
4.2.1 The connector housing is made of seamless steel pipe or steel plate, and the clamping flange is made of cast iron with a grade not less than HT250. The flameproof surface is phosphated and coated with anti-rust oil.
4.2.2 The insulating parts of the connector are made of flame-retardant, arc-resistant and low-moisture-absorbing insulating materials with a leakage resistance grade of b or above. 4.2.3 The inner surface of the connector (except the flameproof surface) is painted with arc-resistant paint, and the outer surface is painted with yellow paint (1140V) and red paint (6000V) respectively, and the color should be uniform.
A clear and permanent embossed mark "Ex" shall be set on the obvious part of the connector shell. 4.2.4wwW.bzxz.Net
The connector shall be equipped with an interlocking device or a warning sign with the words "Operate after power off" shall be set on the obvious part of the shell. 4.2.6
The connector is a plug-in structure and can be equipped with an auxiliary plug-in device. All parts of the connector made of ferrous metal shall be rust-proofed. 4.2.7
All fasteners of the connector shall be equipped with anti-loosening devices. 4.2.9 The connector shall be equipped with internal and external grounding devices and grounding marks. 4.3 Performance indicators
The electrical clearance and electrical distance of the connector shall comply with the provisions of Table 1. Table 1
Rated voltage
Minimum electrical room
Note: a and b are the insulation material leakage resistance grades specified in Appendix D of GB3836.3. Maximum
4.3.2 The flameproof joint surface length and maximum gap of the connector shall comply with the provisions of Table 2. Table 2
Flameproof joint surface length
Length and maximum gap
4.3.3 After finishing, the connector shell shall withstand a 1MPa water pressure test for 1min, and pass the test with discontinuous dripping (1 drop of water per interval greater than 10s).
Connectors shall be subjected to 50Hz power frequency withstand voltage test between phases and between phases and ground as specified in Table 3. Table 3
Power frequency withstand voltage value
Rated voltage
Rated current
200, 400
Effective value
Last for 1min, there shall be no breakdown or flashover. Thermal stability current
Impact withstand voltage value
(peak value)
4.3.56000V connectors shall be subjected to three positive and negative polarity impulse withstand voltage tests between phases and between phases and ground. The test values ​​shall comply with the provisions of Table 3, and no breakdown shall be considered acceptable.
4.3.66000V connectors shall be subjected to 2s thermal stability test as specified in Table 3. After the test, there shall be no contact fusion or other phenomena that hinder continued normal operation.
JB5350—91
6000V connectors must undergo dynamic stability tests, and their dynamic stability current (peak value) is 2.5 times the thermal stability current. 4.3.8
Connectors must undergo moisture and heat resistance tests, and their test cycles and test conditions must comply with the provisions of Table 5. After the test, the following requirements must be met a.
Insulation resistance shall not be less than the values ​​listed in Table 4
Power frequency withstand voltage shall comply with the provisions of Article 4.3.4; c.
The flameproof surface should not be rusted.
Rated voltage
Test cycle
High temperature
Minimum insulation resistance
The connector is in uninterrupted working mode, and its heating must comply with the provisions of Table 5. Table 5
Voltage level
Bare brass
Connector materials and fastening forms
Copper (or brass) silver or nickel plated
Bare copper or bare copper alloy
Silver or nickel plated (including thick silver plated and silver plated)Conductor joint parts connected by bolts or other equivalent methodsBare copper, bare copper alloy and bare aluminum alloy
Tin plated
Silver plated (including thick silver plated) or nickel plated
Terminals connected to external conductors by bolts or screwsBare copper, bare copper alloy and bare aluminum, bare aluminum alloy tin plated or silver plated (including thick silver plated)Connectors are subjected to heating test after 200 plug-in and pull-out cycles, and their temperature rise shall comply with the provisions of Table 5. The plug-in and pull-out force between each plug and socket of the connector is 30~80N. The cable entry device shall be subjected to sealing performance test. The cable entry device shall be subjected to clamping test. The rubber material shall be subjected to aging test, and the change of its hardness after the test shall not exceed 20% of that before the test. The connector housing shall be subjected to dynamic strength test. The connector housing shall be subjected to explosion-proof performance test. 5 Test methods
5.1 The water pressure test in Article 4.3.3 of this standard shall be carried out in accordance with the provisions of Appendix A of GB3836.2. 6000
Allowable temperature rise
5.2 The pressure test in Article 4.3.4 of this standard shall be carried out in accordance with the provisions of Article 6.3 of GB998 and Article 3.3.1 of GB311.3. 5.3 The impact pressure test in Article 4.3.5 of this standard shall be carried out in accordance with the provisions of Chapter 4 of GB311.3. K
JB5350—91
5.4 The thermal stability test in Article 4.3.6 and the dynamic stability test in Article 4.3.7 of this standard shall be carried out in accordance with the provisions of GB2706. 5.5 The moisture and heat resistance test of Article 4.3.8 of this standard shall be carried out in accordance with the provisions of GB2423.4. 5.6 The heating test of Article 4.3.9 of this standard shall be carried out in accordance with the provisions of Chapter 5 of GB998 and GB763. 5.7 The plug-in and pull-out test shall meet the provisions of Article 4.3.10 of this standard. 5.8 The plug-in and pull-out force test of Article 4.3.11 shall be carried out in accordance with the provisions of Appendix A of this standard. 5.9 The sealing performance test of Article 4.3.12 of this standard shall be carried out in accordance with the provisions of Article 21.1.1 of GB3836.2. 5.10 The clamping test of the cable entry device of Article 4.3.13 of this standard shall be carried out in accordance with the provisions of Chapter 27 of GB3836.1. 5.11 The aging test of rubber materials of Article 4.3.14 of this standard shall be carried out in accordance with the provisions of Chapter 29 of GB3836.1. 5.12 The dynamic strength test of Article 4.3.15 of this standard shall be carried out in accordance with the provisions of Chapter 19 of GB3836.2. 5.13 The flameproof performance test in Article 4.3.16 of this standard shall be carried out in accordance with the provisions of Chapter 20 of GB3836.2. 6 Inspection rules
The inspection of connectors is divided into factory inspection and type inspection. 6.1 Factory inspection
6.1.1 Each connector must be inspected and qualified and accompanied by a product certificate before it can leave the factory. 6.1.2 Before it is released, its manufacturing, assembly, appearance and completeness must be inspected to see if they comply with the requirements of the drawings and technical documents. 6.1.3 Inspect whether the connector complies with the requirements of Articles 4.2.1 to 4.3.4 and Article 7.1 of this standard. 6.2 Type inspection
6.2.1 Type inspection must be carried out in any of the following situations: a. Trial design and identification of new products or old products transferred to the factory for production; b. After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c. When the product is resumed after three years of suspension; when the national quality supervision agency proposes a requirement for type inspection: d.
e. Products in normal production are inspected every five years. 6.2.2 Type inspection items In addition to the factory inspection items, it is also necessary to inspect whether they comply with the requirements of Articles 4.3.5 to 4.3.16 of this standard. 6.2.3 The connectors used for type inspection must be selected from the products that have passed the factory inspection, with no less than two units for each test item. If one unit fails the inspection, the test unit can be doubled and retested. If one unit still fails, the batch of products will be considered unqualified.
7 Marking, packaging, transportation, storage
7.1 Each connector should be equipped with a nameplate in a conspicuous place. The basic content of the nameplate includes: a. Product model and name
b. Obvious "Ex" mark on the upper right;
C. Rated voltage, rated current
d. Explosion-proof mark "dI",
Explosion-proof certificate number,
f, factory date or number,
9. Manufacturer's name.
7.2 Finished products leaving the factory should be packed and should meet the requirements of JB2759. The markings on the outside of the packaging box should be clear and obvious, and the contents include: a. Receiving unit and address; b. Product model and name; c. Packing box size and total mass; d. "Handle with care" and "Moisture-proof" or other words or marks e. Manufacturer's name. 7.3 The documents and attachments accompanying the product are: a. Product certificate; b. Product instruction manual; c. Special tools; d. Spare parts JB5350-91 7.4 The finished products in the box should meet the requirements of water and land transportation, and should not be subjected to strong vibration during transportation, and should be protected from rain and snow. 5 The product should be stored in a dry warehouse with good air circulation without rain and snow intrusion. 7.5
JB.5350-91
Appendix A
Test of connector insertion and extraction force
(Supplement)
A1 The test of connector insertion and extraction force can be carried out on the bracket shown in Figure A1. A2 The specific method is as follows:
a. Plug the plug and socket and hang them on the bracket; b. Gradually add the weight to the lower end of the socket,
C. When the socket falls off, the sum of the weight of the weight and its own weight is the value of the insertion force. Figure
1-Bracket
Additional instructions:
2-Plug
8-Socket
This standard is proposed and managed by the Shenyang Electric Drive Research Institute of the Ministry of Machinery and Electronics Industry. This standard is drafted by the Wafangdian Explosion-proof Electric Appliance Factory. This standard is interpreted by the Shenyang Electric Drive Research Institute. The main drafters of this standard are Zhang Yong, Xia Surong, and Zhang Jizhong. 6
4-base code
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