GB 4943.1-2011: [Replaced by GB 4943.1-2022] Information technology equipment -- Safety -- Part 1: General requirements

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Scope

1.1 Scope
1.1.1 Equipment covered by this Part
This part of GB 4943 is applicable to mains-powered or battery-powered information
technology equipment, including electrical business equipment and associated
equipment, with a RATED VOLTAGE not exceeding 600 V.
This Part is also applicable to such information technology equipment.
− designed for use as telecommunication terminal equipment and
TELECOMMUNICATION NETWORK infrastructure equipment, regardless of the
source of power;
− designed and intended to be connected directly to, or used as infrastructure
equipment in, a CABLE DISTRIBUTION SYSTEM, regardless of the source of
power;
− designed to use the AC MAINS SUPPLY as a communication transmission
medium (see Clause 6, Note 4 and 7.1, Note 4).
This Part is also applicable to components and subassemblies intended for
incorporation in information technology equipment. It is not expected that such
components and subassemblies comply with every aspect of the standard, provided
that the complete information technology equipment, incorporating such components
and subassemblies, does comply.
2.9 Electrical insulation
2.9.2 Humidity conditioning
If there are requirements by 2.9.1, 2.10.8.3, 2.10.10 or 2.10.11, humidity and heat
treatment shall be done indoor or in humidity-heat box with air temperature of
(40±2)°C, relative humidity of (93±3)％ for 120 h. During the humidity and heat
treatment, components or modules are not powered.
For equipment which are not prescribed to use under the condition of tropical climate,
if there are requirements by 2.9.1, 2.10.8.3, 2.10.10 or 2.10.11, humidity and heat
treatment shall be done indoor or in humidity-heat box with relative humidity of
(93±3)％ for 48 h. At all positions where can place samples, the air temperature
shall be maintained in any convenient range of temperature values (t±2)°C in
between 20°C and 30°C which will not produce condensation.
With the concurrence of the manufacturer, it is permitted to increase the 48 h time
duration.
2.10.3 Clearances
2.10.3.1 General
CLEARANCES shall be so dimensioned that overvoltages, including transients
that may enter the equipment, and peak voltages that may be generated
within the equipment, do not break down the CLEARANCE.
It is permitted to use either the requirements of 2.10.3 for Overvoltage Category I
or Overvoltage Category II, using the PEAK WORKING VOLTAGE; or the
requirements in Annex G for Overvoltage Category I, Overvoltage Category
II, Overvoltage Category III or Overvoltage Category IV, using the
REQUIRED WITHSTAND VOLTAGE, for a particular component or subassembly
or for the whole equipment. These requirements apply for equipment to be
operated up to 2 000 m above sea
These requirements apply to those equipment which are used at altitude below 2000
meter. For equipment which are prescribed to use at altitude between 2000-5000
meter, their minimum clearance shall multiply the multiplication factor 1.48 of
corresponding altitude of 5000 meter as given by Table A.2 in GB/T 16935.1*. For
equipment which are prescribed to use at altitude above 5000 meter, their minimum
clearance shall multiply the multiplication factor as given by Table A.2 in GB/T
16935.1.And it allows to use linear interpolation between the nearest adjacent 2
points in the Table A.2.The clearance value obtained by using multiplication factor to
calculate shall be rounded to one decimal place.
For equipment which are prescribed to use at altitude between 2000-5000 meter,
their minimum electrical clearance shall multiply the multiplication factor 1.48 of
corresponding altitude of 5000 meter as given by Table A.2 in GB/T 16935.1.For
equipment which are prescribed to use at altitude above 5000 meter, their minimum
clearance shall multiply the multiplication factor as given by Table A.2 table in GB/T
16935.1.And it allows to use linear interpolation between the nearest adjacent 2
points in the Table A.2.The clearance value obtained by using multiplication factor to
calculate shall be rounded to one decimal place.

Basic Data

Standard ID	GB 4943.1-2011 (GB4943.1-2011)
Description (Translated English)	[Replaced by GB 4943.1-2022] Information technology equipment -- Safety -- Part 1: General requirements
Sector / Industry	National Standard
Classification of Chinese Standard	L09
Classification of International Standard	35.020
Word Count Estimation	236,293
Date of Issue	2011-12-30
Date of Implementation	2012-12-01
Older Standard (superseded by this standard)	GB 4943-2001
Adopted Standard	IEC 60950-1-2005, MOD
Regulation (derived from)	Announcement of Newly Approved National Standards No. 23 of 2011
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 applies to grid -powered or battery -powered, rated voltage not exceeding 600V of information technology equipment, including electrical business equipment and associated equipment. This standard also applies to the following information technology equipment: designed as a communication terminal device and the communication network infrastructure, regardless of the way power supply, designed and intended to be connected directly or as a base apparatus in the cable distribution system, device, without regard to power supply means, design using AC mains power supply as an information transmission medium. This standard also applies to information technology equipment intended to be installed on the internal components and assemblies. If you install these components and components complete IT equipment complies with the requirements of this standard, then do not require these components or components comply with all the requirements of this standard.