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YD 1268.2-2003 PDF in English


YD 1268.2-2003 (YD1268.2-2003) PDF English
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YD 1268.2-2003: PDF in English

YD/T 1268.2-2003 (Renamed from YD 1268.2-2003)
YD
COMMUNICATION INDUSTRIAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
YD/T 1268.2-2003
Safety requirements and test method for lithium
battery charger of mobile communication handset
ISSUED ON. JUNE 05, 2003
IMPLEMENTED ON. JUNE 05, 2003
Issued by. Ministry of Information Industry of PRC
Table of Contents
1 Scope ... 3 
2 Normative references ... 3 
3 Terms and definitions ... 3 
4 Safety requirements ... 5 
5 Test methods ... 9 
Annex A (Normative) Test instruments and equipment ... 12 
Safety requirements and test method for lithium
battery charger of mobile communication handset
1 Scope
This Standard specifies the technical requirements for safety characteristics of
lithium battery charger of mobile communication handset as well as the
corresponding test methods.
This Standard is applicable to lithium battery charger of mobile communication
handset (hereinafter referred to as the charger).
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For dated references, the subsequent
amendments (excluding corrigendum) or revisions do not apply to this Standard,
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB 2009-1996, Single phase plug and socket for household and similar
purposes
GB/T 2423.9-2001, Environmental testing for electric and electronic products
-Part 2. Test methods - Test Cb. Damp heat, steady state, primarily for
equipment
GB 4943-2001, Safety of information technology equipment
GB 5013-1997, Rubber insulated cables of rated voltages up to and including
450 / 750V
GB 5023-1997, Polyvinyl chloride insulated cables of rated voltages up to
and including 450/750V
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
when the stored energy level ≥20J or when the voltage is ≥2V, the achievable
continuous power level ≥240VA
3.5 Flammability
3.5.1 Level V-0 material
When tested according to 5.8, it can burn or glow, but its duration does not
exceed 5s on average. The hot particles or burning drops released during
combustion do not ignite the absorbent cotton.
3.5.2 Level V-1 material
When tested according to 5.8, it can burn or glow, but its duration does not
exceed 25s on average. The hot particles or burning drops released during
combustion do not ignite the absorbent cotton.
3.5.3 Level V-2 material
When tested according to 5.8, it can burn or glow, but its duration does not
exceed 25s on average. The hot particles or burning drops released during
combustion shall ignite the absorbent cotton.
4 Safety requirements
4.1 AC input voltage
4.1.1 Rated voltage and range
The rated input voltage is 220V. The fluctuation range shall be 85%~110% of
its rated value.
4.1.2 Rated frequency and range
50±2Hz.
4.2 Component requirements
4.2.1 Power cord assembly
a) Power cord assembly shall meet the requirements of GB 2099.
b) The rated value of the power cord assembly shall be greater than the rated
value required by the charger power supply.
c) The cross-sectional area of the power cord shall not be less than 0.75mm2.
d) The power cord in the power cord assembly shall meet the following
4.6 Output short circuit protection
The charger shall have automatic protection function for short circuit. When the
fault is removed, the charger shall be able to resume work automatically.
4.7 Insulation resistance and insulation strength
4.7.1 Insulation resistance
The test voltage is DC 500V. The insulation resistance of the primary circuit and
secondary circuit of the charger’s main circuit to the housing as well as the
insulation resistance of primary circuit to secondary circuit shall not be less than
2MΩ.
4.7.2 Insulation strength
The primary circuit to the housing, the primary circuit to the secondary circuit
shall be able to withstand 50Hz AC voltage (leakage current ≤10mA) with a
valid value of 1500V for 1min. There shall be no breakdown and no arcing.
The secondary circuit to the ground shall be able to withstand 50Hz AC voltage
(leakage current ≤10mA) with a valid value of 500V for 1min. There shall be no
breakdown and no arcing.
4.8 Requirements for abnormal operation and fault conditions
The charger shall be designed to limit the risk of fire or electric shock due to
mechanical, electrical overload or malfunction, abnormal operation or improper
use. Carry out the test according to 5.7.
4.9 Material requirements
4.9.1 Flammability of material
The material used in the charger housing shall be such that the ignition hazard
and flame spread are minimized, be level V-2 or superior level. Carry out the
test according to 5.8.
4.9.2 Printed board and component
One of the following requirements shall be met.
-- be level V-2 or superior level;
-- be able to pass the test specified in 5.8.
Perform short circuit of the charger output, and the charger shall be able to
automatically protect. It shall be able to resume work automatically after
troubleshooting.
5.6 Insulation test
5.6.1 Insulation resistance test
Under room temperature conditions, use insulation resistance tester with DC
500V voltage to test charger primary circuit to ground, secondary circuit to
ground, primary circuit to secondary circuit. The insulation resistance of the
charger shall meet the requirements of 4.7.1.
5.6.2 Insulation strength test
Use voltage resistance tester to carry out the insulation strength test of the
charger.
The charger must be tested after the insulation resistance test is completed and
the insulation strength is met.
The primary circuit to the housing, the primary circuit to the secondary circuit
shall be able to withstand 50Hz AC voltage (leakage current ≤10mA) with a
valid value of 1500V. The secondary circuit to the housing shall be able to
withstand 50Hz AC voltage (leakage current ≤10mA) with a valid value of 500V.
Test duration. the test voltage is gradually increased from less than half of the
specified voltage value and lasts for 1min when the specified voltage value is
reached.
After the test, it shall meet the requirements of 4.7.2.
5.7 Abnormal work and failure test
5.7.1 Transformer overload test
This test is carried out according to the requirements of Annex C1 of GB 4943.
5.7.2 Simulated failure test
It can simulate the following fault conditions.
-- failure of any component in the primary circuit;
-- failure of any component in the secondary circuit.
5.8 Heat resistance and fireproof test
Poisonous smoke may be emitted during this test. Where applicable, the test
Annex A
(Normative)
Test instruments and equipment
A.1 DC digital voltmeter
Range. 0~100V
Accuracy. level 0.5
A.2 DC digital ammeter
Range. 0~10A
Accuracy. level 0.5
A.3 Charging-discharging machine
Meet relative test conditions of this Standard.
A.4 Vacuum drying oven
Meet relative test conditions of this Standard.
A.5 Insulation resistance tester
Test voltage. DC 500V
Range. 0MΩ~2000MΩ
A.6 Insulation resistance strength tester
Test voltage. AC/DC 0~5000V
Leakage current range. 0~100mA (when the test voltage is AC)
A.7 Constant temperature and constant humidity test chamber
Temperature control range. not lower than the requirements of this Standard.
Temperature control error. ±1°C
Capacity. no less than 5 times the volume of the sample to be tested.
A.8 Vibration and impact test bench
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.