GB/T 29312-2012 English PDF (GBT29312-2012)

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GB/T 29312-2012: Low-voltage reactive power compensation switchgear component
GB/T 29312-2012
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.120.50
K 31
Low-voltage reactive power compensation switchgear
component
低压无功功率补偿投切装置
ISSUED ON: DECEMBER 31, 2012
IMPLEMENTED ON: JUNE 01, 2013
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions... 5 
4 Product categories ... 7 
5 Conditions of use ... 7 
6 Technical requirements ... 9 
7 Test requirements ... 15 
8 Inspection rules ... 21 
9 Marking, packaging, transportation, storage ... 22 
Low-voltage reactive power compensation switchgear
component
1 Scope
This standard specifies terms and definitions, technical and test requirements for low-
voltage reactive power compensation switchgear components.
This standard applies to low-voltage reactive power compensation switchgear
components (hereinafter referred to as switchgear components), which have a rated AC
voltage not exceeding 1000 (or 1140) V and a frequency not exceeding 1000 Hz.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 5169.10 Fire hazard testing for electric and electronic products - Part 10:
Glow/hot-wire based test methods - Glow-wire apparatus and common test
procedure (GB/T 5169.10-2006, IEC 60695-2-10:2000, IDT)
GB/T 5169.11 Fire hazard testing for electric and electronic products - Part 11:
Glowing/hot-wire based test methods - Glow-wire flammability test method for end-
products (GB/T 5169.11-2006, IEC 60695-2-11:2000, IDT)
GB/T 5169.12 Fire hazard testing for electric and electronic products - Part 12:
Glowing/hot-wire based test methods - Glow-wire flammability test method for
materials (GB/T 5169.12-2006, IEC 60695-2-12:2000, IDT)
GB/T 5169.13 Fire hazard testing for electric and electronic products - Part 13:
Glowing/hot-wire based test methods - Glow-wire ignitability test method for
materials
GB 7251.1-2005 Low-voltage switchgear and controlgear assemblies - Part 1:
Type-tested and partially type-tested assemblies (IEC 60439-1:1999, IDT)
GB/T 10233-2005 Basic testing method for low-voltage switchgear and controlgear
assemblies
GB/T 15576-2008 Low-voltage reactive power compensation assemblies
The lower limit of the ambient air temperature is -5 °C.
5.1.1.2 Ambient air temperature of outdoor switchgear component
The ambient air temperature does not exceed +40 °C; its average temperature does not
exceed +35 °C, in the 24 h period.
The lower limit of the ambient air temperature is -25 °C.
5.1.2 Atmospheric conditions
5.1.2.1 Atmospheric conditions for indoor switchgear components
The air is clean; the relative humidity shall not exceed 50%, when the maximum
temperature is +40 °C. At lower temperatures, greater relative humidity is allowed. For
example: The relative humidity is 90%, at +20 °C. However, it shall be considered that
due to temperature changes, moderate condensation may occasionally occur.
5.1.2.2 Atmospheric conditions for outdoor switchgear components
When the maximum temperature is +25 °C, the relative humidity can be as high as
100%, for a short time.
5.1.3 Pollution level
The switchgear component shall be able to be used in an environment of pollution level
3. Other pollution levels can be considered, based on special applications or micro-
environments.
5.1.4 Altitude
The altitude of the installation site shall not exceed 2000 m.
Note: For use at an altitude higher than 2000 m, it shall consider the reduction of the dielectric
strength and the reduction of the air cooling effect.
5.2 Special conditions of use
5.2.1 If it is used under the conditions of use, that do not meet the requirements of 5.1,
it shall comply with the applicable special requirements standard or a special agreement,
which is signed between the manufacturer and the user.
5.2.2 The manufacturer shall consider that when the switchgear component is used in
the system with harmonics, the working current of the capacitor will increase; when the
harmonic is serious, it may cause the zero-crossing detection error of the switching
actions of the semiconductor electronic switch and the compound switch, thereby
increasing the transient inrush current.
The manufacturer shall consider stating it in the conditions of use; if necessary, sign a
special agreement, between the manufacturer and the user.
5.3 Transportation and storage conditions
If the conditions of transportation and storage are inconsistent with those specified in
5.1, a special agreement shall be signed, between the user and the manufacturer.
Unless otherwise specified, the temperature range between -25 °C and +55 °C is
applicable for transportation and storage. In a short time (not more than 24 h), it can
reach +70 °C.
After the switchgear component has been subjected to the above-mentioned high
temperature, when it is not in operation, it shall not suffer any irreversible damage,
AND shall work normally, under the specified conditions.
6 Technical requirements
6.1 Appearance and structure
6.1.1 The shell of the switchgear component shall have sufficient mechanical strength,
to withstand the mechanical force, that may be encountered during use or handling.
When the shell is made of non-rust-proof metal material, the inner and outer surfaces
of the shell shall be coated. The coating layer shall be uniform and beautiful, with firm
adhesion. When using a non-metallic shell, it shall use the flame-retardant materials.
6.1.2 The metal fasteners or metal supports, which are used in the switchgear
component, shall be properly coated. The coating shall have firm adhesion; there shall
be no peeling or peeling off.
6.1.3 The structural design of the switchgear component shall be beautiful in
appearance, easy to maintain, install and debug. Circuit arrangement, component
selection and structural design shall ensure the anti-interference performance of the
switchgear component.
6.1.4 The fasteners used shall ensure that they will not be loosened or displaced, due to
vibration under normal use conditions.
6.1.5 The insulated wires of the main circuit of the switchgear component shall be
connected to the electrical components, by cold crimping terminals. The coordination
between the cold crimping terminal and the insulated wire AND the quality of the
crimping shall comply with the relevant standards.
6.2 Selection of components and accessories
All independent electrical components and accessories, which are installed in the
6.5.3.1 Test conditions:
Main circuit test voltage: Rated frequency, rated voltage Un ± 5%;
Main circuit's test current (capacitive): Rated current In ± 5%.
6.5.3.2 At the moment when the controlled capacitor of the electromechanical
switchgear component is put into use, the peak inrush current, which is generated in the
capacitor branch, shall be less than 50 times the rated current of the capacitor.
6.5.3.3 When the controlled capacitor of the semiconductor switchgear component and
the compound switchgear component is put into use, the peak value of transient inrush
current, which is g...