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GB 1444-2008 English PDF

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GB 1444-2008: [GB/T 1444-2008] Edison screw lamp holders specially used for explosion-proof luminaires
Status: Valid

GB 1444: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB 1444-2008389 Add to Cart 3 days [GB/T 1444-2008] Edison screw lamp holders specially used for explosion-proof luminaires Valid
GB 1444-1987559 Add to Cart 4 days Edison screw lampholders specially used for explosion-proof luminaires Obsolete

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Basic data

Standard ID: GB 1444-2008 (GB1444-2008)
Description (Translated English): [GB/T 1444-2008] Edison screw lamp holders specially used for explosion-proof luminaires
Sector / Industry: National Standard
Classification of Chinese Standard: K74
Classification of International Standard: 29.140.10
Word Count Estimation: 15,155
Date of Issue: 2008-12-31
Date of Implementation: 2010-02-01
Older Standard (superseded by this standard): GB 1444-1987
Regulation (derived from): Announcement of Newly Approved National Standards No. 23 of 2008 (No. 136 overall)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This Chinese standard provides proof lighting special screw lampholders Types, basic parameters and dimensions, structure and materials, and testing requirements and inspection procedures. Note: The test procedure in Appendix A. This standard applies to explosive atmospheres Increased safety and spark -proof lamps dedicated screw lampholders (hereinafter referred to as holder).

GB 1444-2008: [GB/T 1444-2008] Edison screw lamp holders specially used for explosion-proof luminaires


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Edison screw lampholders specially used for explosion-proof liminaires ICS 29.140.10 K74 National Standards of People's Republic of China Replacing GB 1444-1987 Explosion-proof lamps and lanterns special screw lampholders Posted 2008-12-31 2010-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Preface Ⅰ 1 Scope 1 2 Normative references 1 3 Types, basic parameters and dimensions 1 4 4 Structures and Materials 5 Test 4 Numeral 8 6 Appendix A (normative) Test procedures 10 Annex B (informative) Operating temperature limit lamp holder 11

Foreword

All the technical contents of this standard is mandatory. This standard should be GB 3836 "explosive environment with electrical equipment" used together. This standard replaces GB 1444-1987 "explosion-proof luminaries screw lampholders." This standard compared with GB 1444-1987, the major change Of the following. --- Standard Scope is amended as increased safety explosion-proof lamps and non-sparking. --- Increasing the types of built-in lamp holder. --- Insulating material E27 lamp base plastic can be used to increase, the level of insulation material is class Ⅰ. --- Proof chamber parameters to meet the requirements of ⅡC requirements. --- Increasing the connection request. --- Anti-quarter cracking tests in accordance with GB 17935 has been modified. --- Marking an increase of voltage, current, model requirements. --- Delete inspection rules, in accordance with GB 3836.1-2000 Added Appendix A test procedure. The standard proposed by China National Light Industry Council. This standard by the National Standardization Technical Committee of electrical lighting (SAC/TC224) centralized. This standard was drafted. National Lighting Fitting Quality Supervision and Inspection Center, the National Electric Light Source Quality Supervision and Inspection Center (Shanghai), Shanghai era Lighting Appliance Co., Ltd. Detection, Shanghai Institute of lighting. Drafters of this standard. Gongfan Chang, in Licheng. This standard was first published in 1978, 1987 and first revised edition is the second amendment. Explosion-proof lamps and lanterns special screw lampholders

1 Scope

This standard specifies the special explosion-proof lighting screw lampholders type, requires basic parameters and dimensions, structures and materials, and testing and inspection program. Note. The test procedures in Appendix A. This standard applies to explosive atmospheres increased safety explosion-proof lamps and non-sparking dedicated screw lampholders (hereinafter referred to as the base).

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB 1406 screw-type cap of the type and size (GB 1406-2001, eqv IEC 60061-1. 1969) GB/T 2423.4 Environmental testing for electric and electronic products Part 2. Test methods - Test Db. Damp heat (12h + 12h cycle Ring) (GB/T 2423.4-2008, IEC 60068-2-30.2005, IDT) GB/T 2423.17 Environmental testing for electric and electronic products Part 2. Test methods - Test Ka. Salt Spray (GB/T 2423.17- 2008, IEC 60068-2-11. 1981, IDT) GB 3836.1-2000 Electrical equipment for explosive gas atmospheres - Part 1. General requirements (eqv IEC 60079-0.1998) GB 3836.3-2000 Electrical equipment for explosive gas atmospheres Part 3. Increased Safety "e" (eqv IEC 60079-7.1990) GB/T 4207 solid insulating materials under moist conditions index tracking of the measuring method and the proof tracking index compared (GB/T 4207-2003, IEC 60112. 1979, IDT) GB/T 8411.1 ceramic and glass insulating materials - Part 1. Definitions and classification (GB/T 8411.1-2008, IEC 60672-1. 1995, MOD) GB 17935-2007 screw lampholders (IEC 60238.2004, IDT) GB 19148.1 screw lampholders type and size (GB 19148.1-2003, IEC 60061-2.2001, MOD) 3 Types, basic parameters and dimensions Type 3.1 3.1.1 lampholder fixation shall be made paperback style, fitted style. 3.1.2 lampholder of insulating material can be selected. a) ceramics; b) plastic (for E10, E14, E27); Level c) an insulating material for other materials Ⅰ level. 3.2 Basic parameters The basic parameters of the lamp holder shall comply with the requirements in Table 1. Table 1 The basic parameters of the lamp holder Specifications of the connected lamp type lamp holder Maximum working voltage / Maximum operating current / Maximum rated power of the connected lamp / E10 E10/12 E10/13 E10/13 × 11 E10/14 × 11 50 2.5 25 E14 E14/12 E14/23 × 15 E14/25 × 17 250 2.5 60 E27 E27/25 E27/27 E27/35 × 30 E27/65 × 45 E40 E40/45 E40/55 × 47 E40/75 × 54 E40/75 × 64 3.3 lamp socket screw position When the cap is screwed into the corresponding holder, screw the relative position of the center contact of the lamp holder shall comply with Figure 1 and Table 2, Figure 1 It is shown after the cap is screwed in completely, contact the center position. The relative position of Figure 1 and the center of the lamp socket screw contacts Table 2 lamp socket screw and contact center dimensions in millimeters Lamp holder Specifications Minimum Maximum Min E10 7.5 9.3 3.5 E14 12 15 5 E27 17 21 7 E40 27 32 12 3.4 dimensions Lampholder Mounting dimensions shall comply with the requirements of Table 3. Table 3 lampholder Mounting dimensions Specifications lamp holder mounting hole center distance D/mm installation aperture /mm Number of mounting holes E10 26 4 2 E14 30 4 2 E27 50 5 2 E40 70 6 2 3.5 Explosion-proof cell structure parameters Proof contact center cell structure parameters within the lamp holder shall conform ⅡC cylindrical flameproof enclosure requirements, the specific parameters in Table 4. Table 4. proof cell structure parameters Type joints Flameproof chamber net volume Vp / cm3 Flameproof joint length L / mm Flameproof joint maximum diameter difference W / mm Roughness Cylindrical ≤100 ≥6 0.10 Lampholders paperback structure diagram shown in Figure 2. 1 --- insulating sheath; 2 --- center contact; 3 --- proof chamber; 4 --- plastic cover; 5 --- mounting holes; D --- Installation Center pitch. Figure 2 base configuration

4 Structures and Materials

4.1 lampholder thread subject to the provisions of GB 19148.1. Terminal connection wire 4.2 lampholder for space should be left at the bend radius of the wire connecting explosion chamber shall be the central contact terminals Connection of the external phase, with screw connection side marked "N" symbol. Within 4.3 connecting thread between the metal lamp base, which linked debit shall be not less than 2 buckle. 4.4 lampholder connections shall comply with the provisions of 4.1 GB 3836.3-2000. 4.5 lampholder conductive member between different polarities clearances shall be not less than 3mm; creepage distance shall be not less than 4mm. 4.6 ceramic material shall comply with the relevant provisions of GB/T 8411.1 of. 4.7 lampholder inside sealed plastic material shall comply with the provisions of Chapter 12 of GB 3836.1-2000. 4.8 lampholder black metal parts shall be corrosion protective layer should be galvanized (passivation) or Ni plating, the protective layer can not be spotted, since Layer peeling. 4.9 lampholder with copper and copper alloy conductive parts and screw subject to nickel or silver plated. 4.10 plastic surface should no bubbles, cracks, lack of powder, swelling and other defects, compared to the tracking index level plastic parts shall not be less than grade Ⅰ (CTI≥600V).

5 Test

5.1 appearance, dimensional inspection 5.1.1 lampholder appearance and size should meet the requirements of 3.3,3.4,3.5,4.1, with the naked eye and measurement tools for sample size and appearance an examination. 5.1.2 This section 3.3 of the relative position of the lamp holder size screw and the central contact with the amounts shown in FIG. 3 regulations were measured. Gauges shall comply Specified in Table 5. After the gauge is screwed into the bottom of the holder, the stigma should be able to push so that the top mark with a position flush with the gauge or exceeding this location. Figure 3 lamp holder gauge Table 5 lamp socket screw with the central contact relative position size in millimeters E14 6.2 + 0.1 0 15 + 0.015 0 12 +0.1 E27 11.5 + 0.1 0 28 +0.015 017 + 010 0.1 E40 18 + 0.1 0 42 +0.02 +0.1 NOTE. When marking the edge of the gauge coincides Ba Ba is a number 1. 5.2 Humidity Test The lamp holder hanging hanging mouth down in hot and humid test chamber, temperature of 55 ℃ high temperature test cycle according to the provisions GB/T 2423.4 is 48h alternating damp heat test, followed by an insulating dielectric strength test in accordance with the provisions of 6.1 GB 3836.3-2000. 5.3 Impact test Lampholder insulating housing impact test should be carried out. 5.3.1 impact test performed using the apparatus shown in Figure 4. Impact height (refers to hammer the point of impact with the projection distance in the vertical line) shall be in accordance with Table Provisions 6. Pendulum hammer with a Rockwell hardness of R100 made of nylon, quality is 0.15kg, the impact surface of 10mm radius hemispherical shape. Pendulum handle from the outside diameter of 9mm, 0.5mm wall thickness of steel pipe, fixed on the pendulum hammer handle, the effective length of the pendulum handle is 1m. 1 --- dowel pins; 2 --- swing handle; 3 --- hammer; 4 --- sample; 5 --- floor (with a thickness of 8mm, an area of 175 × 175mm2 of plywood); 6 --- bracket. Figure 4 Charpy impact test apparatus Table 6 Impact test height Porcelain 100 Other Material 150 5.3.2 test, the test device fixed to the wall, and then holding the lamp holder on the base plate and the outer edge of the base plate touching it. By hitting points should When the vertical position of the pendulum in the position where the hammer to the top; when hit by the hammer to impact point shall be perpendicular to the axis of the hammer blow to the face. light Block insulative housing select five weak points of the impact 1, there are no visible cracks qualified. 5.4 Test operation 5.4.1 Operation under load stated in Table 7 (purely resistive) conditions, lamp and lamp holder shall bear the corresponding lamp turns on and off each 500 times experiment. Table 7 operating test load Lampholder specification test voltage/V test current/A E10 50 2.5 E14 250 2.5 E27 250 4 E40 is not connected load 5.4.2 Operation test by the circuit shown in Figure 5, Figure 6 on special equipment diagram. Test cap shall comply with the provisions of GB 1406.

5 operation test circuit

1 --- rails; 2 --- test cap; 3 --- sample; 4 --- mechanical transmission (worm) mechanism; 5 --- conductive ring; 6 --- weight. Figure 6 Operation Test Equipment 5.4.3 test, the test will be fixed in the fixture lamp holder, lamp holder screwed 15 times per minute and spin out the action, so that the circuit is turned on the lamp holder And disconnected. Screwing torque shall comply with specified in Table 8. Table 8 screwing torque Lamp holder Specifications Torque/Nm E10 0.8 ± 0.1 E14 1.0 ± 0.1 E27 1.5 ± 0.1 E40 3.0 ± 0.1 5.4.4 After the test, the following items shall be itemized inspection lamp holder. After a) torque table lamp 8 will be screwed into the holder, anti-rotation 15 °, then measure the spin torque is not less than the minimum specified in Table 9. Table 9 spin out with the minimum torque Lamp holder Specifications Torque/Nm E10 0.2 E14 0.3 E27 0.5 E40 1.0 B) After the cap is screwed into the lamp holder is turned on, should continue screwed into the holder than or equal to 1/4 turn. c) lamp holder center contact using compression to the limit position (ie, flush with porcelain mouth), the total stretch subject to the provisions of Table 10. Table 10 Total Stretch Lamp holder Specifications Total Stretch/N E10 10 ~ 20 E14 15 ~ 25 E27 20 ~ 35 E40 30 ~ 50 d) the lampholder shall withstand the electric strength test specified in 6.1 GB 3836.3-2000. e) lampholder parts should not be loose, elastic failure, screw distorted cracking and chipping insulating parts, etc. affect the normal use of the phenomenon. 5.5 Temperature Rise Test 5.5.1 lampholders shall be no outside air flow, strong sunlight and other heat radiating effect of indoor temperature rise test. Maximum conductor section 5.5.2 specified in Table 11 and in line with the GB 1406 lamp by the circuit shown in Figure 7 wiring. Table 11 lampholder wiring conductor cross-sectional area Lampholder specification each of the wires of the total cross-sectional area/mm2 E10 0.2 ~ 1 E14 0.2 ~ 1 E27 0.5 ~ 2.5 E40 1 ~ 4 TY --- auto voltage regulator; R --- variable resistor; S1 --- test lamp base; S2 --- test cap; A --- meter. Figure 7 Test the connection circuit 5.5.3 temperature to be measured with a thermocouple. When the contact temperature measurement, should be pre-welded in place near the thermocouple contact point, but not the thermocouple It should not affect the normal contact with the lamp socket lamp cap. 5.5.4 lampholder listed in Table 1 is passed through the maximum operating current. When the heating rate of not more than 1 ℃ every 30min, the temperature rise is considered to have stabilized. 5.5.5 The test results, the lamp holder center contact temperature must not exceed + 80 ℃, terminals temperature does not exceed + 45 ℃. 5.6 High Temperature Test 5.6.1 will comply with the corresponding lamp holder lamp 1406 GB spin into the holder, then put together in the oven to keep the temperature in 30min ~ 60min to reach higher than the lamp holders within the limit working temperature + 20 ℃ temperature. 5.6.2 In the heat, the temperature deviation is less than ± 5 ℃. 5.6.3 Insulation seven days and nights, the heating is stopped, open the oven to remove the lamp socket to cool to room temperature, with visual inspection and holders may not appear Flexible parts failure, insulation parts cracks, defects significant blistering, swelling, degumming, deformation, filling material flows, impede normal use. 5.7 salt spray test Lampholder black metal parts to be salt spray test. The lamp holder black metal parts removed, cleaned surface to the oil and then placed in the salt spray test chamber in line with GB/T 2423.17 regulations, by After 16h the test, remove the parts, wash off with water remaining on the surface of the salt, check the protective layer surface, with no brown rust or the total area Part of the surface area of greater than 30% white rust. 5.8 Anti-quarter cracking tests Contacts and other parts made of rolled copper or copper alloy sheet in the event of failure would lampholder to become unsafe, shall not be due Excessive residual stress from being damaged. Compliance is checked by the following test. The samples were carefully wipe the surface with acetone wipe paint, gasoline and other objects will wipe grease and fingerprints. The sample is placed 24h in the chamber, the chamber bottom ammonium chloride solution pH value of 10 (for the chamber, the test solution and test Details of the inspection program GB 17935-2007 see Appendix B). After this treatment, the samples were placed in flowing water rinse 24h, there should not be any sample at 8x magnifier visible to the naked eye Cracks. Cracks within the limited range of the mounting surface of the insulating ring near the metal lamp base housing may be considered. NOTE. In order not to affect the test results, samples should be careful when touched. 5.9 flame test 5.9.1 plastics flammability test shall be carried out in still air. 5.9.2 plastic insulating member butane gas (concentration of at least 95%) in the combustion flame 10s, the flame from a gas by a 0.5mm ± Discharge within the burner tube consisting of a long 0.1mm holes 12mm ± 2mm flames, and at least half of the flame should be burning plastic parts 5.9.3 Any self-sustaining flame shall be removed within a gas flame extinguished the 30s, and any burning material dripping from the plastic parts should not make Placed underneath a piece of five horizontally extending 500mm cotton cloth caught fire. 5.10 compared to the tracking index determination OK plastic parts compared to tracking index test and determination of GB/T 4207 provisions of. 5.11 Thermal stability test Lampholder plastic parts and plastic seal parts shall be subjected to the heat resistance test GB in 23.4.7.3 and 23.4.7.4 and prescribed 3836.1-2000 Cold test, after the test shall not affect the type of protection deformed or damaged.

6 marks

Clear of each lamp holder shall clearly and permanently marked, signs include. a) rated current, A; b) rated voltage, V; rated impulse voltage is higher than the following values, they should be marked, kV. Rated voltage of 250V lamp base. 2.5kV; Rated voltage of 500V lamp base. 4kV; Note. The lamp socket rated impulse voltage (kV) may be marked on the lampholder or stated in the manufacturer's catalog or similar documents. Source tags (take the form of trademark, manufacturer identification mark or responsible vendor name, etc.); c) Type Marking; d) Ex-mark Ex; e) Explosion-proof certificate number; f) the symbol "U"; g) operating temperature limit.

Appendix A

(Normative) Inspection procedures A. 1 units in accordance with this standard and 1.2 GB 3836.1-2000 trial types of protection specific standard electrical equipment shall be sent to the national grant Quality supervision and inspection department the right to be tested according to the appropriate standards. It has been made "explosion-proof certification" of the product, while other plant remains To be re-perform inspection procedures. A. 2 inspection work, including technical documentation review and prototype testing of two elements. A. 3 review of technical documents to be sent to the following information. a) with explosion-proof performance related to product design (must sign a complete and bound volumes). The above information and one each in duplicate, sealed after passing the examination by the inspection department, inspection department of a store, a store inspection units. b) inspection unit to ensure that the safety of electrical equipment other information necessary. A. 4 prototype and prototype testing shall send the following information. a) providing a complete prototype meet the eligibility pattern, which should meet the needs of the number of tests. Inspection department deems it necessary, the right to remain Deposit prototype. b) product maintenance manual in duplicate, sealed after passing the examination by the inspection department, inspection department of a store, to send a deposit Inspection units. c) provide inspection required parts and components and the necessary removal tools. d) the relevant test report. The above test reports and records each. e) The plant product quality assurance documentation. A. 5 prototype after passing......
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