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Mechanical Industry Standard of the People's Republic of China
JB/T4313-1986
Explosion-proof Travel Switch
1986-11-01 Issued
Ministry of Machinery Industry of the People's Republic of China
1987-09-01 Implementation
Mechanical Industry Standard of the People's Republic of Chinawww.bzxz.net
Explosion-proof Travel Switch
JB/T4313-1986
1.1 Scope of Application
This standard applies to explosion-proof travel switches (hereinafter referred to as travel switches) with an AC of 50Hz and a rated voltage of 380V or less or a DC rated voltage of 220V or less. Travel switches are used in factories and underground coal mines in explosive gas environments to limit the travel of motion mechanisms such as translation and lifting, or as electrical controls to change the direction, speed and terminal protection of motion mechanisms. 1.2 Relationship between this standard and other standards
1.2.1 Relationship with domestic standards
This standard complies with the requirements of relevant clauses in the following standards: a.
GB1497--85 "Basic Standard for Low Voltage Electrical Appliances", JB4013.185 "General Requirements for Control Circuit Appliances and Switching Elements", GB3836.1-83 "General Requirements for Explosion-proof Electrical Equipment for Explosive Atmospheres"
Various weld-proof electrical equipment "d\",
GB3836.2-83 & Explosion-proof Electrical Equipment for Explosive Atmospheres GB2900.1-—82 "Basic Terms and Terms for Electrical Terminology": GB2900.18-82 " "Electrical terminology and low-voltage electrical appliances", GB2900.35-83 "Electrical terminology and explosion-proof electrical equipment for explosive atmospheres" GB998-82 "Basic test methods for low-voltage electrical appliances", GB156-80 "Rated voltage"
GB762-80 "Rated current of electrical equipment" GB2423.4-81 "Basic environmental test procedures for electrical and electronic products Test Db: Alternating damp heat test method", JB3139-82 "Explosion-proof electrical product model compilation method", JB3019-81 "Outdoor corrosion-proof and explosion-proof and outdoor explosion-proof low-voltage electrical appliances". Relationship with international standards
This standard refers to the following international standards;
International Electrotechnical Commission b. International Electrotechnical Commission publications IEC337-1 (1970), IEC3371A (1973), IEC337-1B (1975), IECa.
337-2 (1972), IEC337--2A (1973), IEC337--2B (1976) and IEC3372C (1977) "Control switch" standards,
b. International Electrotechnical Commission publications IEC664 (1980), IEC664A (1981) "Insulation coordination of low voltage systems, including electrical barriers and creepage distances of electrical equipment". 2 Product varieties and specifications
2.1 Type and classification
2 .1.1 According to the place of use: a, Class I: coal mine and underground use, b, Class I: factory use. 212 Structural type: Approved by the UK on November 1, 1986, implemented on September 1, 1987, direct-acting type, b. Lever type, rotating type, d. Others. According to the control circuit: primary circuit, secondary circuit, tertiary circuit, and quaternary circuit. 2.2 Basic parameters 2·2·2 JB/T 4313 -1986
The rated voltage of the travel switch is 36, 60, 127, 220, 380V. The rated current of the travel switch is: 1, 2.5, 5, 10, 16A. The rated working system of the travel switch is as follows: 2-2.3
8h working system,
uninterrupted working system;
short-time working system.
Model and its meaning
The model and its meaning of the travel switch shall comply with the provisions of JB3139. 3 Normal use conditions
The normal use conditions of the travel switch are shown in Table 1. 4 Technical requirements
4.1 The design, manufacture and inspection of the travel switch shall comply with the requirements of this standard and GB3836.1, GB3836.2, JB3019 and the current relevant standards (such as the general parts standards of the Ministry Standard "Terminals for Flameproof Low-voltage Electrical Appliances" and the Ministry Standard "Rubber-sheathed Relay Introduction Devices for Flameproof Low-voltage Electrical Appliances"). In addition, it shall be manufactured in accordance with the prescribed procedures and the drawings and documents approved by the inspection unit designated by the National Labor Safety Department, and can only be produced after obtaining the "Explosion-proof Certificate" issued by the inspection unit. 4.2 The technical indicators of the internal components of the travel switch shall not only meet the requirements of this standard, but also meet the requirements of their respective standards. 4,3 All fastening bolts (nuts) and wire connections of the travel switch shall not be loose or loosened by themselves. 4,4 The ferrous metal parts of the travel switch shall have anti-corrosion measures. 4.5 The travel switch shall operate reliably within the specified compressible travel or rotation angle range. The compression stroke or rotation angle is specified in the product technical documents.
4.5 The electrical clearance and creepage distance in the travel switch junction box shall comply with the provisions of Article 13.6 of GB3836.2. The electrical clearance and creepage distance of the remaining parts shall not be less than the provisions of Table 2. 4.7 When operating the travel switch under normal conditions, the travel switch contacts shall close and open well without sticking, blocking, or inflexibility.
4.8 The temperature rise limit of the travel switch terminal shall not exceed the provisions of Table 3. The temperature rise of the travel switch contact part shall not damage the normal operation of adjacent components. The temperature rise value is specified in the product technical documents. 4.9 The insulation of the travel switch shall be able to withstand the power frequency test voltage (effective value) listed in Table 4 for 1 minute (the factory test can shorten the test time to 1s) without breakdown and flashover. 4.10 The moisture resistance and slight corrosion resistance of the travel switch shall comply with the provisions of Chapter 28 of GB3836.1, and the minimum insulation resistance under different rated insulation voltages shall comply with the provisions of Table 5. JB/T4313-1986
When the travel switch is used according to the category of use, 9.11
The test parameters of its breaking capacity shall be in accordance with the provisions of Table 6. Table 1
Ambient air temperature
Relative humidity of air
Explosive gas mixture
Not exceeding
Not higher than
Not lower than
Not greater than
Significant shaking and severe impact vibration
Rain and rainfall intensity
Solar radiation intensity
Ice, snow, frost, dew
Main chemical corrosive media in the air
(frequently or irregularly present)
Pollution level
Installation category
+40℃
-20℃
95%(at +25℃）
Maximum rainfall intensity: 50mm/10min
Maximum radiation intensity: 1.4cal/em2.min
According to the provisions of Table 1 of JB3019, there is one
or more than one chemical corrosive medium
Ⅱ, direct
Note: ①For the travel switch with an installation location of more than 2000m, the user should negotiate with the manufacturer. For the use occasions where the surrounding air temperature is higher than +40℃ or lower than -20℃, the user should specify when ordering. ②
Rated voltage
Minimum electrical clearance
Minimum electrical moment
For "a, b, c, d" in the table, please refer to the provisions of Table 2 in GB3836,3. Note:
Current type
Material of terminal
Copper (or brass) tinned
JB/T4313-1986
Copper (yellow tin) silver or nickel plated
Rated insulation voltage U
60U300
300U660
Rated insulation voltage U,
Insulation resistance
Use category
u/u.
Note: I-connection current or disconnection current,
Io rated working current, A;
U-voltage before connection, V,
Ue-rated working voltage, V,
Ur-power supply voltage after disconnection (recovery voltage), V; cosQ-power factor;
To.95-time to reach 95% stable current, m5, P-steady-state power consumption (PmUe·I), W, Pa50W, T0,95=6P=300ms
P>50W, 300ms is T0.95 maximum value. 4·12
Power frequency test voltage (effective value)
Number of on-off times
When the use of the travel switch is determined according to the use category, its electrical life test parameters shall be in accordance with the provisions of Table 7. Time interval
On time
Note: The meaning and explanation of the symbols in the table are shown in Table 6. JB/T4313-1986
Between
10% and
50% of
the time of an
operating cycle
operating frequency
times/hour
not less than the
corresponding
operating frequency
test times in Table
8 (percentage of
the mechanical life times)
4.13 The rated limiting short-circuit current (or rated fuse short-circuit current) of the travel switch shall be able to withstand the expected current value of 1000A within the action time of the circuit breaker (or fuse) under the specified use conditions when the power supply side is equipped with a short-circuit protection circuit breaker (or fuse) designed according to the predetermined value. The specific value of the rated current of the selected circuit breaker (or fuse) is specified in the product technical documents. 4.14 The limit speed (maximum and minimum speed) of the travel switch operating mechanism shall meet the requirements of different uses. The specific value of the limit speed is specified in the product technical documents.
Select.
The mechanical life of the travel switch is expressed by the number of operations when the contact element is unloaded. Its operating frequency and mechanical life times are shown in Table 8 Table 8
Operation frequency
Times/hour
Mechanical life grade
Million times
4.16 The low temperature resistance of the travel switch shall meet the requirements of the use conditions. When the ambient temperature reaches the lower limit of -20℃, the operating mechanism shall be flexible and free of jamming and blocking. When the ambient temperature reaches the lower limit of -25℃, the parts of the travel switch shall be free of damage.
5 Test method
5.1 General inspection
Perform in accordance with the relevant provisions of Chapter 3 of GB998.
5·2 Action performance test
When operating the travel switch under normal conditions, the requirements of Article 4.7 shall be met. 5.3 Temperature rise test
5.3.1Perform the test in accordance with the relevant provisions of Chapter 5 of GB998. 5.3.2After the test, the temperature rise of the conductive parts shall not cause any damage to the adjacent parts, and shall not hinder the operation of the travel switch. The temperature rise of the terminal shall comply with the provisions of Table 3. Perform the power frequency withstand voltage test in accordance with Article 4.9. Only after the power frequency withstand voltage test is passed, the temperature rise test in Article 5
is considered to be qualified.
5.4 Power frequency withstand voltage test
Perform the test in accordance with Articles 6.1 and 6.3 of GB998.
JB/T4313-1986
5.5 Thermal performance test
The wet heat performance test of the travel switch shall be carried out in accordance with the provisions of GB2423.4 and the current tropical electrical product standards. After the test, the electrical insulation performance shall be evaluated according to Article 4.10 of this standard, and the flameproof surface shall be checked for rust. 5.6 Switching capacity test
5.61 When the travel switch has several identical contact elements, only the contact element that is most prone to arcing needs to be tested. If two adjacent contact elements are electrically separated, the test should be carried out on both contact elements at the same time. 5.B.2 The test should strictly simulate the actual use conditions. During the test, no electrical fault, mechanical fault, contact welding, continuous burning or arcing to the shell should occur. After the switching capacity test, the power frequency withstand voltage test shall be carried out according to Article 4.9. The switching capacity test is considered to be qualified only after the power frequency withstand voltage test is passed.
5.8.3 In addition to the above provisions, it shall be carried out according to the relevant provisions of Chapter 7 of GB99S. 5.7 Electrical life test
5.7.1 The operating frequency shall not be less than the specified value, but in order to shorten the test cycle, the operating frequency may be appropriately increased. 2 Since the test speed may affect the electrical life test, the actual use of the product should be simulated when the test is carried out. 5.7·2
Judgement of test results,
a. During the test, no electrical failure, mechanical failure, contact welding, continuous arcing or arcing to the shell shall occur. During the test, the travel switch and its contact elements shall not be maintained, repaired or replaced with parts. b. After the test, the temperature rise and power frequency withstand voltage tests shall be carried out according to Articles 4, 8 and 4.9. The electrical life test is considered to be qualified only after they are qualified. 5.7.4 In addition to the above provisions, it shall be carried out according to Articles 11.1, 11.2 and 11.5 of CB098. 5.8 Rated limiting short-circuit current (or rated fuse short-circuit current) test 5.8.1 At 1.1 times the maximum rated working voltage of the travel switch, the current is connected three times at random, with a full time of not less than 3 minutes, and the power factor is between 0.5 and 0.7.
5.8.2 Judgment of test results,
a. The travel switch should maintain good working condition, and no damage that prevents the further use of the travel switch should occur. According to Article 4.9, the power frequency withstand voltage test should be carried out, and the test voltage is twice the maximum rated working voltage. b.
Limit speed test
Test at the highest speed, and no damage that prevents the further use of the travel switch should occur. 5.9.2
Test at the lowest speed (contact electrical parameters according to Table 6), and there should be no welding on the contacts. The number of tests for the limit speed test shall be specified in the product technical documents. 5.9.8
Mechanical life test
The operating frequency shall not be less than the specified value, but in order to shorten the test cycle, the operating frequency may be appropriately increased. 5.10.2
: During the mechanical life test, the test product shall not be repaired or parts replaced. 5.10.3
Test result judgment:
a: No mechanical failure shall occur during the mechanical life test, which may affect the normal operation of the travel switch, b. After the mechanical life test is completed, the power frequency voltage test shall be carried out according to Article 4.9. Only after the power frequency withstand voltage test is passed, the mechanical life test can be considered to be qualified.
5.10.4 In addition to the above provisions, it shall be carried out according to the relevant provisions of Articles 11.1, 11.2 and 11.4 of GB998. 5.11 Low temperature test
5.11.1 Low temperature performance test
JB/T 4313 -1986
The travel switch is placed in an environment with an ambient temperature of -20℃ and stored for 8 hours. The travel switch should not be stuck, blocked or inflexible. After the test, the insulating parts should not have permanent deformation or cracking. 5.11.2 Low temperature environment adaptability test
The travel switch is placed in a place with a temperature of 25℃ and stored for 8 hours. Its insulating parts and other parts should not have permanent deformation or cracking. 5.11.3After the low temperature test is completed, the power frequency voltage test shall be carried out in accordance with Article 4.9. Only after the power frequency withstand voltage test is passed, the low temperature test is considered to be qualified.
Impact and joint drop test
Carry out in accordance with the relevant provisions of Chapter 21 of GB3836.1. 5.13Connector torsion test
Carry out in accordance with the relevant provisions of Chapter 23 of GB3836.1. 5.14Rubber material chemical test
Carry out in accordance with the provisions of Chapter 29 of GB3836.1.
.15The central tightening effect test, mechanical strength test and sealing performance test of the introduction device shall be carried out in accordance with the provisions of Chapter 27 of GB3836.1 and Chapter 21 of GB3836.2 respectively. 5.18 Water pressure test
Perform according to Article 22.1 and 19.2.3 of GB3836.2. 5.17 Explosion-proof performance test
Perform according to the relevant provisions of GB3836.2.
5.18 Chemical gas corrosion test
Perform according to Article 15 of JB3019.
Inspection rules
The tests of the travel switch include:
Factory test:
Type test:
Periodic test.
Factory test
Each travel switch must pass the inspection and be accompanied by documents proving the quality of the product before it can leave the factory. The factory test items include: General inspection:
Action performance test,
Power frequency withstand voltage test;
Water pressure test.
Type test
Type test of travel switch usually needs to be conducted only once, but it must be re-tested in the following cases. 6.2.1
When.
When trial production of travel switch is completed.
When the design, manufacturing process, raw materials or component structure of travel switch are changed and may affect the working performance of travel switch. Type test items include,
All factory test items;
Temperature rise test;
Wet heat performance test:
Switching capacity test,
Electrical life test;
JB/T4313-1986
Rated limiting short-circuit current (or rated fuse short-circuit current) test; f.
Limit speed test;
Mechanical life test:
Low temperature test,
J. Impact and drop test,
Connector torsion test,
Clamping action test of introduction device, mechanical strength test and sealing performance test, m.
Aging test of rubber material;
Explosion-proof performance test;
Chemical gas corrosion test (only for Class II). o.
Except for mechanical life, there shall be no less than two samples for each test item of type test. Only if all test items can pass during the test, can the type test of the travel switch be considered qualified. Otherwise, the cause must be analyzed, and the test must be conducted again after the defects are eliminated until all test items pass, and the type test of the travel switch can be considered qualified. The samples used for type test must be formal trial-produced samples. The mechanical life test in the type test project is carried out using one of the following two inspection rules: a: Double 3 system test
Three travel switches are tested until the specified number of mechanical lifespans. If all are qualified, the mechanical life test is considered qualified. If more than one fails, the type test fails. If one fails, three more travel switches are tested until the specified number of scale lifespans. If there are no more unqualified samples, the test is considered to have passed. However, in any case, as long as a total of two or more travel switches fail, the test is considered to have failed.
b. Single 8 system test
Eight travel switches must be tested until the specified number of mechanical lifespans. If the number of unqualified switches does not exceed two, the test is considered to have passed.
6.8 Periodic test
The periodic test of the travel switch shall be conducted once every three years, and the mechanical life test may be conducted once every five years. The periodic test items include: all factory test items,
temperature rise test,
switching capacity test;
electrical life test;
mechanical life test,
rubber material aging test.
The samples used for the periodic test must be randomly selected from the products that have passed the factory test. The number of samples for the periodic test is the same as that for the type test. For any test item, if two units fail to pass the test alternately, the periodic test shall be considered as unqualified. If one unit fails to pass the test, the test item shall be retested, and the number of units to be retested shall be doubled according to the original sampling number. If one unit still fails to pass the retest, the periodic test shall also be considered as unqualified. 7 Marking, packaging, transportation, storage
7.1 The travel switch shall be provided with a clear and permanent embossed mark "Ex" on the obvious part of the shell. T.2 The travel switch should be equipped with a nameplate in a conspicuous position, and the contents of the mark are as follows; a. Product model and name,
b. There is a clear mark "E>" on the upper right. C. Explosion-proof mark,
Explosion-proof certificate number;
Rated working voltage,
Rated working current;
Manufacturer name or trademark,
Product production year and month (or production number).
JB/T4313 -1986
7.3 The packaging of the travel switch must meet the requirements of transportation, without damage and moisture, and the packaging box should be accompanied by a packing list and product manual.
The packaging box should have obvious, non-falling words and signs on its surface. The contents are as follows: product model and name,
product quantity,
the packaging box's dimensions "length × width × height" gross weight
name and address of the consignee;
name of the manufacturer:
"Handle with care", "moisture-proof", "upward", and the year and month of packaging or other words or signs. Packaging storage and transportation instructions:
7.4 During storage, the travel switch should be placed in a warehouse with good air circulation, relative humidity not exceeding 90%, temperature not higher than +40℃ and not lower than -25℃, and should not be attacked by rain. Additional remarks:
This standard was proposed and managed by Shenyang Electric Drive Research Institute. This standard was drafted by Dalian Low Voltage Switch Factory. The main drafter of this standard: Ma Daiyu.
Members of the drafting team of this standard: Gu Ximing, Yang Minyu, and Wang Shide. 9
People's Republic of China
Mechanical Industry Standard
Explosion-proof Travel Switch
JB/T4313 -1986
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Format 880×1230
Print Sheet X/X
Number of Words xXXx,xXX
Edition X, XX, 19XX
Printing X, XX, 19XX
Number of Prints 1-XXX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn984 During storage, the travel switch should be placed in a warehouse with good air circulation, relative humidity not more than 90%, temperature not higher than +40℃ and not lower than -25℃, and should not be exposed to rain. Additional remarks:
This standard was proposed and managed by Shenyang Electric Drive Research Institute. This standard was drafted by Dalian Low Voltage Switch Factory. The main drafter of this standard: Ma Daiyu.
Members of the drafting team of this standard: Gu Ximing, Yang Minyu, Wang Shide. 9
People's Republic of China
Mechanical Industry Standard
Explosion-proof Travel Switch
JB/T4313 -1986
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Format 880×1230
Print Sheet X/X
Number of Words xXXx,xXX
Edition X, XX, 19XX
Printing X, XX, 19XX
Number of Prints 1-XXX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn984 During storage, the travel switch should be placed in a warehouse with good air circulation, relative humidity not more than 90%, temperature not higher than +40℃ and not lower than -25℃, and should not be exposed to rain. Additional remarks:
This standard was proposed and managed by Shenyang Electric Drive Research Institute. This standard was drafted by Dalian Low Voltage Switch Factory. The main drafter of this standard: Ma Daiyu.
Members of the drafting team of this standard: Gu Ximing, Yang Minyu, Wang Shide. 9
People's Republic of China
Mechanical Industry Standard
Explosion-proof Travel Switch
JB/T4313 -1986
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Format 880×1230
Print Sheet X/X
Number of Words xXXx,xXX
Edition X, XX, 19XX
Printing X, XX, 19XX
Number of Prints 1-XXX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn98
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