GB/T 20138-2006 English PDF (GB/T20138-2006)

GB/T 20138-2006: Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code)
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GB/T 20138-2006
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.020
K 60
GB/T 20138-2006 / IEC 62262.2002
Degrees of protection provided by enclosures for
electrical equipment against external mechanical
impacts (IK code)
(IEC 62262.2002, IDT)
ISSUED ON. MARCH 06, 2006
IMPLEMENTED ON. AUGUST 01, 2006
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
Introduction ... 4 
1  Scope ... 5 
2  Normative references ... 6 
3  Definitions... 6 
4  Designations ... 7 
5  General requirements for tests ... 8 
6  Test to verify the protection against mechanical impacts ... 9 
7  Test apparatus ... 9 
Foreword
This Standard is identical to IEC 62262.2002 Degrees of protection provided by enclosures for
electrical equipment against external mechanical impacts (IK code) (English version)
This Standard was proposed by China Electrical Equipment Industrial Association
This Standard shall be under the jurisdiction of National Technical Committee on Electric
Rotating Machinery of Standardization Administration of China (SAC/TC 26).
The responsible drafting organizations of this Standard. Shanghai Electrical Apparatus Research
Institute (Group) Co., Ltd, participating drafting organization are Guangzhou Electrical Apparatus
Research Institute, Nanyang Anti-explosion Electrical Research Institute and Xi’an High-voltage
Research Institute.
The chief drafting staffs of this Standard. Chen Kang, Liu Gonggui, Zhou Shaozhong, Li
Zhongting, Wu Qingyun and Ni Peijuan.
This Standard is issued for the first time.
Degrees of protection provided by enclosures for electrical equipment
against external mechanical impacts (IK code)
1 Scope
This Standard refers to the classification of the degrees of protection provided by enclosures
against external mechanical impacts when the rated voltage of the protected equipment is not
greater than 72.5 kV.
This Standard is only applicable to enclosures of equipment where the specific standard
establishes degrees of protection of the enclosure against mechanical impacts (expressed in this
Standard as “impacts”).
The object of this Standard is to give
a) the definitions for the degrees of protection provided by enclosures of electrical equipment
as regards protection of the equipment inside the enclosure against harmful effects of
mechanical impacts;
b) the designations for the degrees of protection;
c) the requirements for each designation;
d) the tests to be performed to verify that the enclosure meets the requirements of this
Standard.
It will remain the responsibility of individual technical committees to decide on the extent and
manner in which the classification is used in their standards and to define the "enclosure" as it
applies to their equipment. However, it is recommended that, for a given classification, the tests do
not differ from those specified in this Standard. If necessary, complementary requirements may be
included in the relevant product standard.
For a particular type of equipment a product committee may specify different requirements
provided that at least the same level of safety is ensured.
This Standard deals only with enclosures that are in all other respects suitable for their intended
use as specified in the relevant product standard and which from the point of view of materials and
workmanship ensure that the claimed degrees of protection are maintained under the normal
conditions of use.
This Standard is also applicable to empty enclosures provided that the general test requirements
are met and that the selected degree of protection is suitable for the type of equipment.
Standard shall apply.
6 Test to verify the protection against mechanical impacts
6.1 The test specified in this Standard is a type test.
6.2 In order to verify the protection against mechanical impacts, blows shall be applied to the
enclosure to be tested. The devices to be used for this test are described in clause 7.
6.3 During the test the enclosure shall be mounted on a rigid support, according to the
manufacturer’s instructions for use. A support is considered to be sufficiently rigid if its
displacement is less than or equal to 0.1 mm under the effect of an impact directly applied and
whose energy corresponds to the degree of protection. Alternative mounting and support, suitable
for the product, may be specified in the relevant product standard.
6.4 The number of impacts shall be five on each exposed face unless otherwise specified in the
relevant product standard. The impacts shall be evenly distributed on the faces of the enclosure(s)
under test. In no case shall more than three impacts be applied in the surroundings of the same
point of the enclosure. The relevant product standard shall specify the points of application of
impacts.
6.5 Test evaluation
The relevant product standard shall specify the criteria upon which the acceptance or rejection of
the enclosure is to be based, particularly
- admissible damages,
- verification criteria relative to the continuity of the safety and reliability of the equipment.
7 Test apparatus
The test shall be done by using one of the test apparatus described in GB/T 2423.55-2006.
The relevant product standard shall specify which types of test apparatus are appropriate.
GB/T 20138-2006
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.020
K 60
GB/T 20138-2006 / IEC 62262.2002
Degrees of protection provided by enclosures for
electrical equipment against external mechanical
impacts (IK code)
(IEC 62262.2002, IDT)
ISSUED ON. MARCH 06, 2006
IMPLEMENTED ON. AUGUST 01, 2006
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
Introduction ... 4 
1  Scope ... 5 
2  Normative references ... 6 
3  Definitions... 6 
4  Designations ... 7 
5  General requirements for tests ... 8 
6  Test to verify the protection against mechanical impacts ... 9 
7  Test apparatus ... 9 
Foreword
This Standard is identical to IEC 62262.2002 Degrees of protection provided by enclosures for
electrical equipment against external mechanical impacts (IK code) (English version)
This Standard was proposed by China Electrical Equipment Industrial Association
This Standard shall be under the jurisdiction of National Technical Committee on Electric
Rotating Machinery of Standardization Administration of China (SAC/TC 26).
The responsible drafting organizations of this Standard. Shanghai Electrical Apparatus Research
Institute (Group) Co., Ltd, participating drafting organization are Guangzhou Electrical Apparatus
Research Institute, Nanyang Anti-explosion Electrical Research Institute and Xi’an High-voltage
Research Institute.
The chief drafting staffs of this Standard. Chen Kang, Liu Gonggui, Zhou Shaozhong, Li
Zhongting, Wu Qingyun and Ni Peijuan.
This Standard is issued for the first time.
Degrees of protection provided by enclosures for electrical equipment
against external mechanical impacts (IK code)
1 Scope
This Standard refers to the classification of the degrees of protection provided by enclosures
against external mechanical impacts when the rated voltage of the protected equipment is not
greater than 72.5 kV.
This Standard is only applicable to enclosures of equipment where the specific standard
establishes degrees of protection of the enclosure against mechanical impacts (expressed in this
Standard as “impacts”).
The object of this Standard is to give
a) the definitions for the degrees of protection provided by enclosures of electrical equipment
as regards protection of the equipment inside the enclosure against harmful effects of
mechanical impacts;
b) the designations for the degrees of protection;
c) the requirements for each designation;
d) the tests to be performed to verify that the enclosure meets the requirements of this
Standard.
It will remain the responsibility of individual technical committees to decide on the extent and
manner in which the classification is used in their standards and to define the "enclosure" as it
applies to their equipment. However, it is recommended that, for a given classification, the tests do
not differ from those specified in this Standard. If necessary, complementary requirements may be
included in the relevant product standard.
For a particular type of equipment a product committee may specify different requirements
provided that at least the same level of safety is ensured.
This Standard deals only with enclosures that are in all other respects suitable for their intended
use as specified in the relevant product standard and which from the point of view of materials and
workmanship ensure that the claimed degrees of protection are maintained under the normal
conditions of use.
This Standard is also applicable to empty enclosures provided that the general test requirements
are met and that the selected degree of protection is suitable for the type of equipment.
Standard shall apply.
6 Test to verify the protection against mechanical impacts
6.1 The test specified in this Standard is a type test.
6.2 In order to verify the protection against mechanical impacts, blows shall be applied to the
enclosure to be tested. The devices to be used for this test are described in clause 7.
6.3 During the test the enclosure shall be mounted on a rigid support, according to the
manufacturer’s instructions for use. A support is considered to be sufficiently rigid if its
displacement is less than or equal to 0.1 mm under the effect of an impact directly applied and
whose energy corresponds to the degree of protection. Alternative mounting and support, suitable
for the product, may be specified in the relevant product standard.
6.4 The number of impacts shall be five on each exposed face unless otherwise specified in the
relevant product standard. The impacts shall be evenly distributed on the faces of the enclosure(s)
under test. In no case shall more than three impacts be applied in the surroundings of the same
point of the enclosure. The relevant product standard shall specify the points of application of
impacts.
6.5 Test evaluation
The relevant product standard shall specify the criteria upon which the acceptance or rejection of
the enclosure is to be based, particularly
- admissible damages,
- verification criteria relative to the continuity of the safety and reliability of the equipment.
7 Test apparatus
The test shall be done by using one of the test apparatus described in GB/T 2423.55-2006.
The relevant product standard shall specify which types of test apparatus are appropriate.