Some standard content:
Ministry of Machinery Industry of the People's Republic of China Standard JB3956-85
Mining Flameproof Feeder Switch
1985-03-13 Issued
Ministry of Machinery Industry of the People's Republic of China
1985-08-01 Implementation
Ministry of Machinery Industry of the People's Republic of China Standard Mining Flameproof Feeder Switch
JB3956-85
This standard applies to mining flameproof feeder switches (hereinafter referred to as feeder switches). The feeder switch is mainly used in coal mines, in AC 50Hz, rated voltage 1140V and below, rated current 500A and below, as the main switch and branch switch of the power supply system, and can also be used for infrequent starting of large-capacity motors. When an overload or short circuit fault occurs in the line, the feeder switch can automatically cut off the circuit as required. At the same time, the feeder switch can be used in conjunction with a leakage relay or equipped with a leakage protection unit to protect the leakage fault in the system.
This standard shall comply with the relevant provisions of GB3836.1--83 "General requirements for explosion-proof electrical equipment for explosive atmospheres", GB3836.2--83 "Explosion-proof electrical equipment for explosive atmospheres Flameproof electrical equipment "d"", and GB1497-85 "Basic standards for low-voltage electrical appliances". 1 Variety specifications
1.1 The feeder switches manufactured according to this standard are of the following types. 1.1.1 According to the selected components:
a. Use frame-type circuit breakers as the main circuit switches; b. Use device-type circuit breakers as the main circuit switches; c.wwW.bzxz.Net
Use vacuum circuit breakers as the main circuit switches. Note: The technical requirements for the feeder switches using vacuum circuit breakers as the main circuit switches are specified by the product technical conditions. 1.1.2 According to the purpose:
Feeder switches for power distribution,
b. Feeder switches for controlling motors.
1.1.3 According to the type of release;
With shunt release and overcurrent release, with undervoltage release and overcurrent release, b.
With shunt release, undervoltage release and overcurrent release. 1.1.4
According to the type of current and leakage protection:
Short circuit protection;
Overload protection and short circuit protection;
Leakage protection and short circuit protection;
d. Overload protection, leakage protection and short circuit protection. Note: The short circuit protection of the feeder switch is instantaneous. 1.1.5 According to the type of voltage protection:
With undervoltage protection device:
b.Without undervoltage protection device.
1.2 Basic parameters (unless otherwise specified in product standards or technical documents). The rated working voltage level of the main circuit of the feeder switch is 380, 660, 1140V*. 1.2.1
The rated working current of the feeder switch is 100, 200, 400, 500A**. 1.2.2
: The rated working voltage of the feeder switch is equal to the rated insulation voltage. The rated working current of the feeder switch is equal to the rated heating current. The Ministry of Machinery Industry of the People's Republic of China issued 198503-13 and implemented on 1985-08-01
Standard power supply frequency; 50Hz.
The feeder switch is a long-term working system.
2 Technical requirements
JB3956-85
The feeder switch shall comply with the requirements of this standard and be manufactured in accordance with the drawings and documents approved by the prescribed procedures. 2.2
The feeder switch shall comply with the relevant provisions of GB3836.1 and GB3836.2, and obtain the "explosion-proof certificate" issued by the inspection unit. The components of the feeder switch (circuit breaker, button, control transformer, instrument, electronic device, etc.) must comply with the 2.3
standards of their respective products.
Normal working conditions of the feeder switch:
Altitude does not exceed 2000m;
The operating environment temperature is generally -5℃～+40℃. If the ambient temperature range is different, it must be indicated on the nameplate, and the temperature rise shall be calculated based on the highest ambient temperature;
Relative air humidity shall not exceed 95% (equivalent to +25°C); in mines with explosive mixtures of methane; in places without significant shaking and impact vibration; the installation inclination with the vertical plane shall not exceed 15° in an environment without gases and steam that damage insulation, and without dripping water:
Installation category: Class II;
Pollution level: Level 3.
The feeder switch must be able to withstand an AC 50Hz power frequency test voltage for 1 minute without breakdown or flashover. For the main circuit and the control circuit and auxiliary circuit specified to be connected to the main circuit, the power frequency test voltage values are shown in Table 1; for the control circuit and auxiliary circuit specified not to be connected to the main circuit, the power frequency test voltage values are shown in Table 2. Table 1
300u≤660
660800
8001000
1000600
600>CTI400
400>CTI>175
175>CTI≥100
The creepage distance in this area has not been specified. Material group subb is generally not recommended for use in pollution level 8 above 630V. K
The terminal temperature rise limit of 70K is mainly determined by the external polyvinyl chloride (PVC) wire or cable. In actual use, the external connecting wire or cable should not be significantly less than the test connecting wire or cable. ..
The temperature rise limit should be determined based on operating experience or life test, but not more than 65K. Absolute
JB3956-85
Temperature rise limit measured by resistance method
(Line diagram in air)
The temperature rise limits of other components (positions) such as main contacts, auxiliary contacts, and internal wire connections of products are separately specified by product standards. In principle, the temperature rise of its components (positions) should be limited to not damaging the normal operation of the components (positions) themselves and the connected or adjacent components. 2.10 At 1.05 times the rated working voltage, the short-circuit connection and disconnection capacity of the feeder switch shall comply with the provisions of Table 7, and after the test, its main circuit components should not have permanent and obvious deformation. Table
Rated current
Short-circuit connection and disconnection capacity kA (effective value of cycle component/COSΦ) 380y
Note: After completing the on-off test, it is allowed to open the shell cover, clean it slightly, and then make the last on-off. 2.11
The mechanical life of the feeder switch shall comply with the values specified in the selected circuit breaker standard. The electrical life of the feeder switch shall comply with the values specified in Table 8. For insulation material grade, see JB794-66 "Heat resistance classification of insulation materials for motors, electrical appliances and transformers". Test cycle and interval time → + on/off + on/off The temperature rise limit of the insulation coil in the air is recommended under the condition of an annual average temperature of 20°C. For conditions where the annual average temperature exceeds 20°C, the temperature rise limit of the insulation coil should be reduced accordingly or resolved by negotiation between the manufacturer and the user. 5 Feeder switch Control motor For power distribution JB3956-85 Cos$≤0.8 Voltage level Note: U. is the rated working voltage (V) and I. is the rated working current (A). 2.13 The overload capacity and number of operations of the feeder switch should comply with the provisions of Table 9. Table
Feeder switch
Control motor
Power distribution
cOS$≤0.4
Ue, 3I.
Voltage level
Operation rate
Operation frequency
Electrical life
1/5 of mechanical life
(100A)0.20
(200~500A)0.10
(200~500A)0.10
2.14 For feeder switch with shunt release, after the coil test voltage is 110% of the rated voltage and the feeder switch is disconnected once at intervals of 5s, the feeder switch should still be able to be disconnected at no more than 75% of the rated voltage. The undervoltage release of the feeder switch should meet the following requirements: 2.15
When the feeder switch is in the closed position and the coil is heated to a stable temperature rise under the rated voltage, the release action voltage is guaranteed to be between 70% and 35% of the rated voltage to disconnect the feeder switch; when the feeder switch is in the open position, the power supply voltage is equal to or exceeds 85% of the rated voltage of the release, and the feeder switch must be reliably closed. b.
For the feeder switch with delayed undervoltage protection, the delay is adjustable, and the adjustable range is 1 to 3S. For the non-adjustable delay, the delay time is divided into 1, 3, and 5s.
2.16 The short-circuit protection of the feeder switch is divided into electromagnetic and electronic types. The adjustable range of electromagnetic protection is 1 to 3 times the rated current of the release; the adjustable range of electronic protection is 310 times the rated current of the release. The error of the electromagnetic protection setting value is not more than ±20%; the error of the electronic protection setting value is not more than ±10%. When the protection range is required to exceed this clause, the user and the manufacturer shall negotiate and resolve it separately. The overload delay protection characteristics of the feeder switch shall comply with the provisions of Table 10. 2.17
Ambient temperature ℃
Note:?
Test current
Current setting value
JB3956-85
No tripping within 2h
Trip within 1h
Returnable>8s (semiconductor type)
Time>5s (thermal tripping type)
No tripping within 2h
Trip within 1h
No tripping within 2h
Trip within 1h||t t||When only two poles of the three-pole overcurrent releaser are actuated, the maximum current value specified for tripping within 1h shall be increased by 10%, state
Starting from cold state
Starting from hot state
Starting from cold state
Starting from hot state
Starting from cold state
Starting from hot state
②The table shows the agreed non-tripping current, y is the agreed tripping current, and the current multiple indicated by y is the current multiple when all poles are fully energized. 2.18 The overload long-delay protection of the feeder switch can be divided into thermal tripping type and semiconductor type. The setting range of the thermal tripping type is 0.64~1 times the rated current of the releaser, and the setting range of the semiconductor type is 0.4~1 times the rated current of the releaser. When the protection range is required to exceed this article, the user and the manufacturer shall negotiate and resolve it separately.
2.19 From the receipt of the leakage relay action signal to the feeder switch cutting off 3 times or less of the rated working current, the total action time shall not exceed 0.15s.
2.20 The basic technical parameters of the feeder switch with leakage protection unit shall comply with the provisions of Table 11. The error between the leakage action resistance value and the leakage blocking resistance value and the set value shall not exceed +20%. Table 11
Rated voltage
Leakage action resistance
Setting value kQ
.60 (three-phase)
11 (single-phase)
3.5 (single-phase)
Leakage blocking resistance
Setting value k
120 (three-phase)
22 (single-phase)
7 (single-phase)
Leakage protection action time includes feeder switch action time. When 1kQ action resistance
Action time ms
When measuring leakage protection action time, feeder switch disconnects 8 times or less rated working current. Capacitor 0.02~1f (phase)
Compensation effect
The wiring terminals of feeder switch shall comply with the provisions of JB400285 "Wiring terminals of flameproof low-voltage electrical appliances for mining". 2.22 The cable entry device of the feeder switch shall comply with the provisions of the Ministry of Standards "Rubber-sheathed Cable Entry Devices for Low-voltage Explosion-proof Electrical Appliances". 2.23 After the output end of the feeder switch is powered off, if there are still live parts in the shell, a protective insulating cover plate shall be added and a warning sign with the word "live" shall be marked.
JB3956—85
2.24 The water pressure test of the shell parts of the feeder switch shall comply with the provisions of Appendix A of GB3836.2. 2.25 The shell of the feeder switch must be equipped with a reliable mechanical interlock to ensure that the main cavity shell cover can only be opened when the feeder switch is in the disconnected position. After the main cavity shell cover is opened, the feeder switch cannot be closed in normal operation. The bolt-fastened structure allows the use of a warning sign instead.
2.26 The closed and disconnected states of the feeder switch should have clear mechanical indications. If other indication devices are attached, requirements shall be put forward in the product technical conditions.
2.27 The short-circuit and leakage protection devices of the feeder switch shall adopt the form of manual reset for their operating mechanism. The reset device shall have special fasteners or can be installed inside the housing with the protection device. 2.28 The feeder switch shall be provided with internal and external grounding screws in accordance with the provisions of Chapter 15 of GB3836.1. 2.29 All parts made of ferrous metal, except the working surface of the magnet, shall have anti-corrosion protection measures. 2.30 All threaded connections shall have devices to prevent self-loosening. 2.31 Under the condition that the user complies with the rules of transportation, storage, installation and use, within 12 months from the date of installation, but not more than 18 months from the date of delivery to the user by the manufacturer, if the product is damaged or fails to work normally due to poor manufacturing quality, the manufacturer shall be responsible for repairing or replacing it for the user.
3 Test method
3.1 Article 2.2 of this standard, the explosion-proof performance test of the feeder switch shall be carried out by the examination unit designated by the state in accordance with the methods specified in GB3836.1 and GB3836.2.
3.2 This standard 2.Article 5, the insulation withstand voltage test of the feeder switch shall be carried out in accordance with the methods specified in Articles 6.1, 6.3.1~6.3.5 of GB998-82 "Basic Test Methods for Low Voltage Electrical Appliances". When making factory tests, it is allowed to use a fast test method in which the test voltage value is increased by 25% and lasts for 1s.
3.3 Article 2.6 of this standard, the moisture resistance test of the feeder switch shall be carried out in accordance with the methods specified in Chapter 28 of GB3836.1. 3.4 Article 2.9 of this standard, the temperature rise test of the feeder switch shall be carried out in accordance with the methods specified in Articles 5.1, 5.2.1~5.2.9, 5.2.11, 5.3.1~5.3.4 of GB998.
3.5 Article 2.10 of this standard, the short-circuit connection and disconnection capacity test of the feeder switch shall be carried out in accordance with the methods specified in Articles 8.2.1~8.2.4 of GB998.
3.6 Articles 2.11 to 2.13 of this standard, the mechanical life, electrical life, overload capacity and operation number tests of the feeder switch shall be carried out in accordance with the methods specified in Articles 11.1, 11.2 and 11.3.2 of GB998. In addition to the above-mentioned articles, the mechanical life test shall also be carried out in accordance with the methods specified in Articles 114.1 to 11.4.4; the electrical life test and the overload capacity and operation number test shall also be carried out in accordance with the methods specified in Articles 11.5.1 to 11.5.3 and 11.5.5. After the test, the withstand voltage level and working capacity of the feeder switch shall be assessed in accordance with Class A requirements. 3.7 For the temperature rise test of the shunt release, when the voltage is 1.1 times the rated voltage of the release, the number of power-on times and time intervals meet the conditions of Article 214, the temperature rise is measured by the resistance method. When the shunt release is tested for factory operation, it is allowed to be tested once in a cold state at 75% of the rated working voltage.
3.8 Article 2.15 of this standard, the undervoltage release action performance test of the feeder switch shall be carried out in accordance with the methods specified in Articles 10.2, 10.3.1, 10.3.2 and 10.3.4 of GB998. When making factory tests, they can be carried out in a cold state according to the equivalent conversion requirements. 3.9 Articles 2.16 to 2.18 of this standard, the short-circuit protection and overload protection performance test methods of the feeder switch shall be specified in the product technical conditions with reference to Articles 10.4.1, 10.4.2, 10.4.4, 10.4.5, 10.5.1 and 10.5.2 of GB998. 3.10 Articles 2.19 and 2.20 of this standard, for the leakage protection performance test of the feeder switch with leakage protection unit, the leakage action resistance value and the leakage blocking resistance value shall be determined by using a variable resistance box to simulate the leakage resistance to determine whether they meet the requirements; the action time measurement can be carried out during the type test and periodic test, and is obtained by adding the mechanical action time and the arcing time. 3.11 Articles 2.21 and 2.22 of this standard, the test of the wiring terminals and cable entry devices of the feeder switch shall be carried out in accordance with the methods specified in Chapters 23 and 27 of GB3836.1 and Chapter 21 of GB3836.2. 8
JB3956—85
3.12 Article 2.24 of this standard, the water pressure test of the shell parts of the feeder switch shall be carried out in accordance with the methods specified in Appendix A of GB3836.2. 4 Inspection rules
4.1 The inspection and test of the feeder switch can be divided into three types: type test, periodic test and factory inspection. 4.2 The feeder switch shall be subjected to type test in the following cases: a. Trial production of new products
b. When changes in product materials, structure or process may affect the performance of the feeder switch. 4.3 The type test of the feeder switch shall check whether the test feeder switch complies with the provisions of Articles 2.2, 2.5 to 2.30, 5.1 and 5.2 of this standard.
4.4 The periodic test of the feeder switch shall be carried out every five years. 4.5 The periodic test of the feeder switch shall check whether the feeder switch complies with the provisions of Articles 2.5 to 2.30, 5.1 and 5.2 of this standard. Article 2.2 of this standard, the explosion-proof performance test of the feeder switch shall be carried out when it is considered necessary. 4.6 The feeder switches used for type test and periodic test shall be extracted from the products that have passed the factory test, and no less than two feeder switches shall be evaluated for each test item. If two units fail to pass the test, the batch of feeder switches will be considered unqualified in the type test and periodic test; if one test product fails a certain test, double the number can be drawn for retesting the item. If there is still one unit that fails, the batch of feeder switches will be considered unqualified in the type test and periodic test, and the production of the product or individual parts must be stopped. Production can only be continued after the defects are eliminated and the test is passed.
4.7 Feeder switches must pass the inspection before they can be shipped, and a product quality certificate must be attached. 4.8 Before the feeder switches leave the factory, the assembly quality, appearance and completeness of the product must be inspected according to the drawings and relevant documents. 4.9 The factory inspection test of the feeder switch should check whether the product meets the provisions of 2.5, 2.7, 2.8, 2.14, 2.15, 2.17, 2.18, 2.23~2.30, 5.1, and 5.2 of this standard. If it fails, it must be repaired until it passes, and those that cannot be repaired should be scrapped. 5 Marking, packaging, transportation and storage
The feeder switch should be provided with a clear permanent embossed mark "E" on the obvious place of the shell. 5.1
Each product should be fixed with a product nameplate in an appropriate and obvious place. The content of the nameplate is as follows: 5.2
Manufacturer name or trademark;
Product model and name;
Mark "Ex" in the obvious place on the upper right
Explosion-proof mark "dI",
Rated working current, A;
Rated current of the release, A;
Rated working voltage, V,
Explosion-proof certificate number;
Weight, kg,
Product manufacturing number:
Factory date or number.
5.3The feeder switch shipped out of the factory should be packed to prevent damage during transportation and meet the requirements of moisture and dustproof. The packaging of the feeder switch should be suitable for land transportation, water transportation and loading requirements. 5.4
The words and signs on the outer wall of the packaging box should include the following: 5.5
Name and address of the consignee;
h. Product model and name;
c. Manufacturer's name:
d. Gross weight, kg,
Packaging box dimensions;
JB3956-85
Signs such as "upward", "moisture-proof", "rainproof", "handle with care" and other words or symbols. f.
The technical documents supplied with the product include:
Packing list:
b. Product certificate of conformity;
Product instruction manual.
5.7The packaging box shall not be exposed to rain during transportation. The product should be placed in a warehouse without rain or snow intrusion, with good air circulation, an ambient temperature not higher than +40℃ and not lower than -25℃, a relative humidity not greater than 90%, and no corrosive gases that damage metals and insulation. Additional notes:
This standard was proposed by the Ministry of Machinery Industry and is under the jurisdiction of Shenyang Electric Drive Research Institute. This standard was drafted by Shanghai Electric Factory. The main drafter of this standard was Xu Jialiang.4. When making factory tests, they can be carried out in a cold state according to the equivalent conversion requirements. 3.9 Articles 2.16 to 2.18 of this standard, the short-circuit protection and overload protection performance test methods of the feeder switch, refer to Articles 10.4.1, 10.4.2, 10.4.4, 10.4.5, 10.5.1, and 10.5.2 of GB998 and are specified by the product technical conditions. 3.10 Articles 2.19 and 2.20 of this standard, for the leakage protection performance test of the feeder switch with a leakage protection unit, a variable resistance box is used to simulate the leakage resistance to determine whether the leakage action resistance value and the leakage lockout resistance value meet the requirements; the action time measurement can be carried out during type tests and periodic tests, and is obtained by adding the mechanical action time and the arcing time. 3.11 The test of the wiring terminals and cable entry devices of the feeder switch in Article 2.21 and 2.22 of this standard shall be carried out in accordance with the methods specified in Chapter 23 and 27 of GB3836.1 and Chapter 21 of GB3836.2. 8
JB3956—85
3.12 The water pressure test of the shell parts of the feeder switch in Article 2.24 of this standard shall be carried out in accordance with the methods specified in Appendix A of GB3836.2. 4 Inspection rules
4.1 The inspection and test of the feeder switch can be divided into three types: type test, periodic test and factory inspection. 4.2 The feeder switch shall be subjected to type test in the following cases: a. Trial production of new products
b. When changes in product materials, structure or process may affect the performance of the feeder switch. 4.3 The type test of the feeder switch shall check whether the test feeder switch meets the provisions of Articles 2.2, 2.5 to 2.30, 5.1 and 5.2 of this standard.
4.4 The periodic test of the feeder switch shall be carried out every five years. 4.5 The periodic test of the feeder switch shall check whether the feeder switch complies with the provisions of Articles 2.5 to 2.30, 5.1 and 5.2 of this standard. Article 2.2 of this standard states that the explosion-proof performance test of the feeder switch shall be carried out when it is considered necessary. 4.6 The feeder switches used for type test and periodic test shall be selected from the products that have passed the factory test, and no less than two feeder switches shall be evaluated for each test item. If two units fail in the test, the type test and periodic test of the batch of feeder switches shall be considered unqualified; if one test product fails a certain test, double the number of units can be selected for retesting the item. If there is still one unit that fails, the type test and periodic test of the batch of feeder switches shall be considered unqualified, and the production of the product or individual parts must be stopped. Production can only be continued after the defects are eliminated and the test is qualified.
4.7 The feeder switch shall be qualified before it can be shipped, and it must be accompanied by a product quality certificate. 4.8 Before the feeder switch leaves the factory, the assembly quality, appearance and completeness of the product shall be inspected according to the drawings and relevant documents. 4.9 The factory inspection test of the feeder switch shall inspect whether the product meets the provisions of 2.5, 2.7, 2.8, 2.14, 2.15, 2.17, 2.18, 2.23 to 2.30, 5.1 and 5.2 of this standard. If it fails to meet the requirements, it shall be repaired until it meets the requirements. Those that cannot be repaired shall be scrapped. 5 Marking, packaging, transportation and storage
The feeder switch shall be provided with a clear permanent embossed mark "E" in a conspicuous place on the shell. 5.1
Each product shall be equipped with a product nameplate in an appropriate and obvious position. The content of the nameplate is as follows:5.2
Manufacturer name or trademark;
Product model and name;
“Ex” is marked in the obvious position on the upper right
Explosion-proof mark “dI”,
Rated working current, A;
Rated current of the release, A;
Rated working voltage, V,
Explosion-proof certificate number;
Weight, kg,
Product manufacturing number:
Factory date or number.
5.3The feeder switch shipped out of the factory shall be packed to prevent damage during transportation and meet the requirements of moisture and dustproof. The packaging of the feeder switch shall be suitable for land transportation, water transportation and loading requirements. 5.4
The words and signs on the outer wall of the packing box should include the following:5.5
Name and address of the consignee;
h. Product model and name;
c. Manufacturer's name:
d. Gross weight, kg,
Packing box dimensions;
JB3956-85
Signs such as "upward", "moisture-proof", "rainproof", "handle with care" and other words or symbols. f.
The technical documents supplied with the product include:
Packing list:
b. Product certificate of conformity;
Product instruction manual.
5.7The packing box shall not be exposed to rain during transportation. The product should be placed in a warehouse without rain or snow intrusion, with good air circulation, an ambient temperature not higher than +40℃ and not lower than -25℃, a relative humidity not greater than 90%, and no corrosive gases that damage metals and insulation. Additional notes:
This standard was proposed by the Ministry of Machinery Industry and is under the jurisdiction of Shenyang Electric Drive Research Institute. This standard was drafted by Shanghai Electric Factory. The main drafter of this standard was Xu Jialiang.4. When making factory tests, they can be carried out in a cold state according to the equivalent conversion requirements. 3.9 Articles 2.16 to 2.18 of this standard, the short-circuit protection and overload protection performance test methods of the feeder switch, refer to Articles 10.4.1, 10.4.2, 10.4.4, 10.4.5, 10.5.1, and 10.5.2 of GB998 and are specified by the product technical conditions. 3.10 Articles 2.19 and 2.20 of this standard, for the leakage protection performance test of the feeder switch with a leakage protection unit, a variable resistance box is used to simulate the leakage resistance to determine whether the leakage action resistance value and the leakage lockout resistance value meet the requirements; the action time measurement can be carried out during type tests and periodic tests, and is obtained by adding the mechanical action time and the arcing time. 3.11 The test of the wiring terminals and cable entry devices of the feeder switch in Articles 2.21 and 2.22 of this standard shall be carried out in accordance with the methods specified in Chapters 23 and 27 of GB3836.1 and Chapter 21 of GB3836.2. 8
JB3956—85
3.12 The water pressure test of the shell parts of the feeder switch in Article 2.24 of this standard shall be carried out in accordance with the methods specified in Appendix A of GB3836.2. 4 Inspection rules
4.1 The inspection and test of the feeder switch can be divided into three types: type test, periodic test and factory inspection. 4.2 The feeder switch shall be subjected to type test in the following cases: a. Trial production of new products
b. When changes in product materials, structure or process may affect the performance of the feeder switch. 4.3 The type test of the feeder switch shall check whether the test feeder switch meets the provisions of Articles 2.2, 2.5 to 2.30, 5.1 and 5.2 of this standard.
4.4 The periodic test of the feeder switch shall be carried out every five years. 4.5 The periodic test of the feeder switch shall check whether the feeder switch complies with the provisions of Articles 2.5 to 2.30, 5.1 and 5.2 of this standard. Article 2.2 of this standard states that the explosion-proof performance test of the feeder switch shall be carried out when it is considered necessary. 4.6 The feeder switches used for type test and periodic test shall be selected from the products that have passed the factory test, and no less than two feeder switches shall be evaluated for each test item. If both of them fail in the test, the type test and periodic test of the batch of feeder switches shall be considered unqualified; if one of the test products fails a certain test, double the number of test products can be selected for retesting the item. If there is still one unqualified product, the type test and periodic test of the batch of feeder switches shall be considered unqualified, and the production of the product or individual parts must be stopped. Production can only be continued after the defects are eliminated and the test is qualified.
4.7 The feeder switch shall be qualified before it can be shipped, and it must be accompanied by a product quality certificate. 4.8 Before the feeder switch leaves the factory, the assembly quality, appearance and completeness of the product shall be inspected according to the drawings and relevant documents. 4.9 The factory inspection test of the feeder switch shall inspect whether the product meets the provisions of 2.5, 2.7, 2.8, 2.14, 2.15, 2.17, 2.18, 2.23 to 2.30, 5.1 and 5.2 of this standard. If it fails to meet the requirements, it shall be repaired until it meets the requirements. Those that cannot be repaired shall be scrapped. 5 Marking, packaging, transportation and storage
The feeder switch shall be provided with a clear permanent embossed mark "E" in a conspicuous place on the shell. 5.1
Each product shall be equipped with a product nameplate in an appropriate and obvious position. The content of the nameplate is as follows:5.2
Manufacturer name or trademark;
Product model and name;
“Ex” is marked in the obvious position on the upper right
Explosion-proof mark “dI”,
Rated working current, A;
Rated current of the release, A;
Rated working voltage, V,
Explosion-proof certificate number;
Weight, kg,
Product manufacturing number:
Factory date or number.
5.3The feeder switch shipped out of the factory shall be packed to prevent damage during transportation and meet the requirements of moisture and dustproof. The packaging of the feeder switch shall be suitable for land transportation, water transportation and loading requirements. 5.4
The words and signs on the outer wall of the packing box should include the following:5.5
Name and address of the consignee;
h. Product model and name;
c. Manufacturer's name:
d. Gross weight, kg,
Packing box dimensions;
JB3956-85
Signs such as "upward", "moisture-proof", "rainproof", "handle with care" and other words or symbols. f.
The technical documents supplied with the product include:
Packing list:
b. Product certificate of conformity;
Product instruction manual.
5.7The packing box shall not be exposed to rain during transportation. The product should be placed in a warehouse without rain or snow intrusion, with good air circulation, an ambient temperature not higher than +40℃ and not lower than -25℃, a relative humidity not greater than 90%, and no corrosive gases that damage metals and insulation. Additional notes:
This standard was proposed by the Ministry of Machinery Industry and is under the jurisdiction of Shenyang Electric Drive Research Institute. This standard was drafted by Shanghai Electric Factory. The main drafter of this standard was Xu Jialiang.
Product manufacturing number:
Factory date or number.
5.3 The feeder switch shipped out of the factory should be packed to prevent damage during transportation and meet the requirements of moisture and dustproof. The packaging of the feeder switch should be suitable for land transportation and water transportation and loading requirements. 5.4
The text and logo on the outer wall of the packaging box should include the following:5.5
Name and address of the consignee;
h. Product model and name;
c. Manufacturer's name:
d. Gross weight, kg,
Packaging box size;
JB3956-85
Signs such as "upward", "moisture-proof", "rainproof", "handle with care" and other words or symbols. f.
The technical documents supplied with the product are:
Packing list:
b. Product certificate;
Product manual.
5.7 The packaging box shall not be exposed to rain during transportation. The product shall be placed in a warehouse without rain or snow intrusion, with good air circulation, ambient temperature not higher than +40℃, not lower than -25℃, relative humidity not higher than 90%, and free of corrosive gases that damage metals and insulation. Additional remarks:
This standard was proposed by the Ministry of Machinery Industry and is under the jurisdiction of Shenyang Electric Drive Research Institute. This standard was drafted by Shanghai Electric Factory. The main drafter of this standard is Xu Jialiang.
Product manufacturing number:
Factory date or number.
5.3 The feeder switch shipped out of the factory should be packed to prevent damage during transportation and meet the requirements of moisture and dustproof. The packaging of the feeder switch should be suitable for land transportation and water transportation and loading requirements. 5.4
The text and logo on the outer wall of the packaging box should include the following:5.5
Name and address of the consignee;
h. Product model and name;
c. Manufacturer's name:
d. Gross weight, kg,
Packaging box size;
JB3956-85
Signs such as "upward", "moisture-proof", "rainproof", "handle with care" and other words or symbols. f.
The technical documents supplied with the product are:
Packing list:
b. Product certificate;
Product manual.
5.7 The packaging box shall not be exposed to rain during transportation. The product shall be placed in a warehouse without rain or snow intrusion, with good air circulation, ambient temperature not higher than +40℃, not lower than -25℃, relative humidity not higher than 90%, and free of corrosive gases that damage metals and insulation. Additional remarks:
This standard was proposed by the Ministry of Machinery Industry and is under the jurisdiction of Shenyang Electric Drive Research Institute. This standard was drafted by Shanghai Electric Factory. The main drafter of this standard is Xu Jialiang.
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