This standard applies to various incandescent light sources and gas discharge light sources. GB 7248-1987 Safety requirements for electric light sources GB7248-1987 standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Safety requirements of
electrical light source
This standard applies to various incandescent light sources and gas discharge light sources. 1 Glossary
1.1 Rated voltage
The voltage or voltage range marked on the electric light source. 1.2 Rated current
The current marked on the electric light source.
1.3 rated power
The power indicated on the electric light source.
1.4 Lamp holder temperature rise
UDC 621.32
.019.3
GB7248-87
Measured in accordance with GB7250-87 "Measurement method of lamp holder temperature rise" The surface temperature rise on the standard test lamp holder installed on the lamp.
1.5
Initial torsional torque
The torsional torque exerted by the electric light source between the lamp shell and the lamp head after initial aging. 1.6 End-of-life torsional torque
The torsional torque exerted by the electric light source between the lamp casing and the lamp holder at the end of its life. 1.7 Live parts
Live parts that may cause electric shock during normal use. Safety requirements
2
2.1 Marks
2.1.1 Each electric light source should be marked with the following clear and firm marks: Source mark (manufacturer name or trademark), a.
represents the electric light source model with rated voltage, rated current, rated power or other rated parameters. b.
2.1.2 The outer packaging box or outer packaging box of the electric light source should be marked: source mark,
a.
b. Electric light source model: ||tt ||c.
The ignition point position of the electric light source (if there are restrictions); d. Safe transportation sign.
2.2 Anti-electric shock performance
The metal shell on the lamp head of the electric light source that is insulated from the live body should not be charged. 2.3 Creepage distance and clearance
2.3.1 The creepage distance between the lamp holder's shell and the charged body and between the charged bodies of different polarities shall not be less than that specified in Table 1. Approved by the National Bureau of Standards on 1987-02-09
Implemented on 1987-10-01
Lamp Head
Feed Distance
B15d
2.5||tt| |B22d
2.5
E5
0.8
GB7248-87
Table 1
E10
2||tt ||E14
3
E27
3
E40
5
G5
1.5
G13
2.5
The electrical gap between the solder or wire exposure on the lamp holder contact piece and the lamp holder shell or live body should not be less than 1mm. 2.3.2
2.4 Insulation resistance
mm
G23
3
The insulation resistance of B15d, B22d, E27, E40 and G13 lamp holders is normal It should not be less than 50MQ in climates, and should not be less than 2M2 in humid climates.
Note: ①The insulation resistance value of other models of lamp heads is to be determined. ②Normal climate conditions refer to environmental conditions where the air temperature is 25±5℃ and the relative humidity is 50% to 80%. ③ Humid climate conditions refer to environmental conditions where the air temperature is 40±2℃ and the relative humidity is 90% to 95%. 2.5 Lamp holder temperature rise
2.5.1
The average temperature rise of incandescent bulbs used for general lighting should not exceed the requirements in Table 2. Table 2
Lamp
Power, W
40
60
100
150
200||tt| |300
E14
130
140
Average lamp head temperature rise (maximum value), ℃
E27
140||tt ||120
130
130
130
130
B15d
135
145
B22d
140
125
135
135
Note: ① Incandescent bulbs for general lighting include single spiral and double spiral general lighting bulbs. Nitrogen lighting bulbs, frosted, opalescent lighting bulbs and decorative bulbs.
②The temperature rise of the lamp caps of special white light bulbs and gas discharge lamps is to be determined. 2.6 Torsional torque
The electric light source should be able to withstand the torsional torque in Table 3 without loosening. Table 3
Lamp head model
Torque torque
Initial torque
End of life torque
B15d
1.50
1.05| |tt||B 22d
3.0
1.5
E14
1.50
1.05
E27
3.0|| tt||1.5
E40
5.0
2.5
G5
0.6
G10
·0.2||tt ||N·m
G13
1.2
GB7248—87
The lamp head is connected with a mechanical structure, allowing slight relative displacement between the lamp head and the glass bulb. 2.7 Blowing fuse
60~300W double spiral general lighting bulbs should be equipped with a blowing fuse. When an arc discharge occurs in the bulb, the blown fuse should be able to interrupt the bulb without damaging the integrity of the glass envelope. 2.8 Prevent short circuit inside the lamp
2.8.1 There must be no free moving objects in the incandescent light source that can cause a short circuit in the filament or damage the glass bulb. 2.8.2 The outer guide wires of the electric light source shall not be short-circuited and shall not overlap with the lamp holder shell. 2.9 Explosion-proof cover
Ultra-high pressure gas discharge lamp should be equipped with a safety protective cover to prevent explosion during transportation and storage. Note: This requirement does not apply to ultra-high pressure mercury lamps. 2.10 Heat resistance
The insulator outside the electric light source used to prevent electric shock or fix energized parts should have sufficient heat resistance. Note: Except for glass and ceramics.
2.11 Fireproof and flameproof
The insulators outside the electric light source used to prevent electric shock or fix energized parts should be fireproof and flameproof. Note: Except for glass and ceramics.
3 Test methods
3.1 Marking
3.1.1 The correctness and clarity of the marking (sections 2.1.1 and 2.1.2) shall be inspected by the appearance method. 3.1.2 The firmness of the mark (section 2.1.1) is checked by gently wiping the mark 5 times with a soft damp cloth and a soft cloth dipped in alcohol. After wiping, the markings should still be legible.
3.2 The anti-electric shock performance (Article 2.2) is checked with an electrotesting device. 3.3 Check the creepage distance and electrical clearance (Article 2.3) with a vernier caliper. 3.4 Insulation resistance (Article 2.4) is measured with a 500V DC megger or insulation resistance measuring instrument. Insulation resistance under humid climate conditions should be measured immediately with a 500V DC megohmmeter or insulation resistance tester after storing the lamp head in a humidity box with a relative humidity of 90% to 95% and a temperature of 40±2.℃ for 1 hour. .
3.5 Lamp head temperature rise (Article 2.5) is measured according to GB7250-87. 3.6 The torsional moment (Article 2.6) is measured with a torque meter. The lamp holder used when measuring torque is specified in the product standard. 3.7 Check the blown fuse (Article 2.7) with the following method: Connect the circuit as shown in Figure 1, place the test bulb in the protective cover, and gradually apply sufficient voltage (380~470V) to the bulb to cause arc discharge. . The current intensity of arc discharge should be limited to the range of 10A. During the test, if the fuse melts or the filament or guide wire burns out without damaging the integrity of the glass bulb, the test is considered qualified. GB7248—87
Figure 1
K-power switch, T-step-up transformer, 0~1000V/1A, A-four-digit digital voltmeter, 0~500A, V voltmeter, 0 ~600V, M-safety protection cover
3.8 The prevention of short circuit inside the lamp (Article 2.8) and the explosion-proof cover (Article 2.9) shall be inspected by the appearance method. 3.9 Heat resistance (No. 2.10) Check with the following method: press a steel ball with a diameter of 5mm (see Figure 2) on the surface of the specimen with a force of 20N, and place it together in an oven with a temperature of 125°C. After baking for 1 hour, immerse it. 10 seconds in cold water. After cooling to room temperature, measure the indentation made by the steel ball on the test piece. If the diameter does not exceed 2mm, it is qualified.
Figure 2
1 - spherical surface; 2 - sample
3.10 Fire protection and combustion prevention (Article 2.11) Use the fire test bench shown in Figure 3 to check. Before the test, insert the test product into the middle of the heating shaft with a thermocouple inside with a force of 12N, then place the heating shaft into the fire test bench and lock it. During the test, turn on the power and heat the heating shaft to 300±1°C within 3 minutes. The temperature of the heating shaft is measured by a thermocouple installed in the center of the shaft, and then a high-frequency spark generator is used to conduct high-frequency discharge at the mandrel on the surface of the specimen. The length of the discharge spark is about 6 mm. At this time, neither the test piece nor the gas released after the test piece is heated must be ignited by high-frequency sparks. GB7248-87
Di
O
Figure 3
1 - thermocouple, 2 - test sample: 3 - heating current terminal block, 4 - thermocouple wiring Terminal
Note: The energy of high-frequency sparks shall meet the test requirements of this article and shall not ignite unheated test pieces. $6.3
4 Acceptance rules
4.1 Test content
GB7248-87
In order to check whether the safety performance of the electric light source meets the requirements of this standard, the manufacturer shall The electric light source undergoes full inspection, delivery test and routine test.
4.2 Inspection
All electric light source products should check whether the metal shell on the lamp head of the electric light source that is insulated from the live body is charged (Article 2.2), and remove the charged ones.
4.3 Handover test
4.3.1 Items belonging to the handover test include the mark of the electric light source (Article 2.1), electrical clearance (Article 2.3.2), and initial torsional moment (Article 2.6 Article), short circuit protection within the lamp (Article 2.8) and explosion-proof cover (Article 2.9). 4.3.2 The quality qualification level (AQL) of the delivery test items shall be as specified in Table 4. The electric light source products for handover testing should be uniformly selected from each batch of products produced. The quantity, sample size, 4.3.32
sampling method and transfer rules for each batch of product should be specified in the product standard. 4.4 Routine tests
4.4.1
Items belonging to routine tests include creepage distance (Article 2.3.1), insulation resistance (Article 2.4), and lamp head temperature rise (Article 2.5 ) (Article 2.6), blowing fuses (Article 2.7), heat resistance (Article 2.10), fire protection and combustion resistance (Article 2.11). End-of-life torque (
4.4.2
4.4.3
The quality failure level (RQL) of routine testing should be specified in Table 4. Electric light source products for routine testing, The sample size and sampling method for routine testing should be uniformly selected from the electric light source products that pass the delivery test in each cycle. The test period,
Table 4
Serial Number|| tt||1
2
3
5
6
8
9
10||tt| | 11 | | tt | | 12 | Cover
Electrical distance
Insulation resistance
Lamp head temperature rise
End of life torque
Blow fuse
Heat resistance||tt ||Fire protection and flame retardant
Article
Safety requirements
2.1
2.3.2
2.6
2.8
2.9
2.3.1
2.4
2.5
2.6
2.7
2.10
2.11
Section
Test method
3.1
3.3
3.6Www.bzxZ.net
3.8
3.8
3.3
3.4
3.5
3.6
3.7
3.9
3.10
Test type
Settlement test
delivery test
delivery test
delivery test
delivery test
routine test
routine test
routine Test
Routine test
Routine test
Routine test
Routine test
AQL, %
(by GB| |tt||2828-81)
2.5
1.5
0.65
2.5
2.5
RQL,
0%
(according to GB
2929-81)
20
20
25
20
20| |tt||20
GB 724887
This standard is proposed by the Ministry of Light Industry of the People's Republic of China. The main drafter of this standard is Tong Xianhai.3
The quality failure level (RQL) of routine testing should be specified in Table 4. The electric light source products for routine testing should be evenly selected from the electric light source products that pass the delivery test in each cycle. Sample sizes and sampling methods for routine testing should be specified in the product standard. Test cycle,
Table 4
Serial number
1
2
3
5
6||tt| |8
9
10
11
12
Test items
Mark
Electrical clearance||tt| |Initial torque
Protection against short circuit within the lamp
Explosion-proof cover
Electrical distance
Insulation resistance
Lamp head temperature rise
End of life torque
Blow fuse
Heat resistance
Fire and flame retardant
Bar
Safety requirements
2.1
2.3. 2
2.6
2.8
2.9
2.3.1
2.4
2.5
2.6
2.7
2.10
2.11
Type
Test method
3.1
3.3
3.6
3.8
3.8
3.3
3.4
3.5
3.6
3.7
3.9
3.10|| tt||Test type
delivery test
delivery test
delivery test
delivery test
delivery test
routine test
routine test
routine test
routine test
routine test
routine test
routine Test
AQL, %
(according to GB
2828-81)
2.5
1.5
0.65
2.5
2.5
RQL,
0%
(according to GB
2929-81)
20
20| |tt||25
20
20
20
GB 724887
This standard is proposed by the Ministry of Light Industry of the People's Republic of China. This standard is proposed by Beijing Electric Light Source The institute is responsible for drafting. The main drafter of this standard is Tong Xianhai.
3
The quality failure level (RQL) of routine testing should be specified in Table 4. The electric light source products for routine testing should be evenly selected from the electric light source products that pass the delivery test in each cycle. Sample sizes and sampling methods for routine testing should be specified in the product standard. Test cycle,
Table 4
Serial number
1
2
3
5
6||tt| |8
9
10
11
12
Test items
Mark
Electrical clearance||tt| |Initial torque
Protection against short circuit within the lamp
Explosion-proof cover
Electrical distance
Insulation resistance
Lamp head temperature rise
End of life torque
Blow fuse
Heat resistance
Fire and flame retardant
Bar
Safety requirements
2.1
2.3. 2
2.6
2.8
2.9
2.3.1
2.4
2.5
2.6
2.7
2.10
2.11
Type
Test method
3.1
3.3
3.6
3.8
3.8
3.3
3.4
3.5
3.6
3.7
3.9
3.10|| tt||test type
delivery test
delivery test
delivery test
delivery test
delivery test
routine test
routine test
routine test
routine test
routine test
routine test
routine Test
AQL, %
(according to GB
2828-81)
2.5
1.5
0.65
2.5
2.5
RQL,
0%
(according to GB
2929-81)
20
20| |tt||25
20
20
20
GB 724887
This standard is proposed by the Ministry of Light Industry of the People's Republic of China. This standard is proposed by Beijing Electric Light Source The institute is responsible for drafting. The main drafter of this standard is Tong Xianhai.
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