GB/T 4942.1-2006 English PDF (GB/T4942.1-2006)

GB/T 4942.1-2006: Degrees of protection provided by the integral design of rotating electrical machines (IP code) -- Classification
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GB/T 4942.1-2006
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.160.01
K 20
GB/T 4942.1-2006 / IEC 60034-5:2000
Replacing GB/T 4942.1-2001
Degrees of Protection Provided by the Integral Design of
Rotating Electrical Machined (IP Code) - Classification
(IEC 60034-5:2000, Rotating Electrical Machines -
Part 5: Degrees of Protection Provided by the Integral Design
of Rotating Electrical Machines (IP Code) - Classification IDT)
ISSUED ON: MARCH 06, 2006
IMPLEMENTED ON: AUGUST 01, 2006
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope and Objective ... 4
2 Normative References ... 4
3 Designation ... 5
4 Degrees of Protection - First Characteristic Numeral ... 6
5 Degrees of Protection – Second Characteristic Numeral ... 7
6 Marking ... 9
7 General Requirements for Tests ... 10
8 Tests for First Characteristic Numeral ... 10
9 Tests for Second Characteristic Numeral ... 12
10 Requirements and Tests for Open Weather-Protected Machines ... 15
Degrees of Protection Provided by the Integral Design of
Rotating Electrical Machined (IP Code) – Classification
1 Scope and Objective
This Part applies to the classification of degrees of protection provided by enclosures
for rotating electrical machines. It defines the requirements for protective enclosures
that are in all other respects suitable for their intended use and which, from the point of
view of materials and workmanship, ensure that the properties dealt with in this
Standard are maintained under normal conditions of use.
This Part does not specify:
--- Degrees of protection against mechanical damage of the machine, or conditions
such as moisture (produced for example by condensation), corrosive dust and
vapor, fungus or vermin;
--- Types of protection of machines for use in a potentially explosive (dust, vapor)
environment.
--- Requirements for fences placed around the enclosure only for personal safety.
In certain applications (such as agricultural or domestic appliances), more extensive
precautions against accidental or deliberate contact may be specified.
This Part gives definitions for standard degrees of protection provided by enclosures
applicable to rotating electrical machines as regards:
a) Protection of persons against contacts with or approach to live parts and against
contact with moving parts (other than smooth rotating shafts and the like) inside
the enclosure and protection of the machine against ingress of solid foreign
objects;
b) Protection of machines against the harmful effects due to ingress of water.
This Part gives designations for these protective degrees and tests to be performed to
check that the machines meet the requirements of this Standard.
2 Normative References
The provisions in following documents become the provisions of this Part through
reference in this Part. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Part, 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 755-2000 Rotating Electrical Machines - Rating and Performance (idt IEC
60034-1:1996)
GB/T 1993-1993 Cooling Methods for Rotating Electrical Machines (eqv IEC
60034-6:1991)
3 Designation
The designation used for the degree of protection consists of the letters IP followed by
two characteristic numerals signifying conformity with the conditions indicated in the
tables of Clauses 4 and 5, respectively.
3.1 Single characteristic numeral
When it is required to indicate a degree of protection by only one characteristic numeral,
the omitted numeral shall be replaced by the letter X, for example IPX5 or IP2X.
3.2 Supplementary letters
Additional information may be indicated by a supplementary letter following the second
characteristic numeral. If more than one letter is used, the alphabetic sequence shall
apply.
3.2.1 In special applications (such as machines with open circuit cooling for ship deck
installation with air inlet and outlet openings closed during standstill), numerals may be
followed by a letter indicating whether the protection against harmful effects due to
ingress of water was verified or tested for the machine not running (letter S) or the
machine running (letter M). In this case, the degree of protection in either state of the
machine shall be indicated, for example IP55S/IP20M.
The absence of the letters S and M shall imply that the intended degree of protection
will be provided under all normal conditions of use.
3.2.2 For air-cooled open machines suitable for specific weather conditions and
provided with additional protective features or processes (as specified in Clause 10),
the letter W may be used.
3.3 Example of designation
GB/T 4942.1-2006
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.160.01
K 20
GB/T 4942.1-2006 / IEC 60034-5:2000
Replacing GB/T 4942.1-2001
Degrees of Protection Provided by the Integral Design of
Rotating Electrical Machined (IP Code) - Classification
(IEC 60034-5:2000, Rotating Electrical Machines -
Part 5: Degrees of Protection Provided by the Integral Design
of Rotating Electrical Machines (IP Code) - Classification IDT)
ISSUED ON: MARCH 06, 2006
IMPLEMENTED ON: AUGUST 01, 2006
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope and Objective ... 4
2 Normative References ... 4
3 Designation ... 5
4 Degrees of Protection - First Characteristic Numeral ... 6
5 Degrees of Protection – Second Characteristic Numeral ... 7
6 Marking ... 9
7 General Requirements for Tests ... 10
8 Tests for First Characteristic Numeral ... 10
9 Tests for Second Characteristic Numeral ... 12
10 Requirements and Tests for Open Weather-Protected Machines ... 15
Degrees of Protection Provided by the Integral Design of
Rotating Electrical Machined (IP Code) – Classification
1 Scope and Objective
This Part applies to the classification of degrees of protection provided by enclosures
for rotating electrical machines. It defines the requirements for protective enclosures
that are in all other respects suitable for their intended use and which, from the point of
view of materials and workmanship, ensure that the properties dealt with in this
Standard are maintained under normal conditions of use.
This Part does not specify:
--- Degrees of protection against mechanical damage of the machine, or conditions
such as moisture (produced for example by condensation), corrosive dust and
vapor, fungus or vermin;
--- Types of protection of machines for use in a potentially explosive (dust, vapor)
environment.
--- Requirements for fences placed around the enclosure only for personal safety.
In certain applications (such as agricultural or domestic appliances), more extensive
precautions against accidental or deliberate contact may be specified.
This Part gives definitions for standard degrees of protection provided by enclosures
applicable to rotating electrical machines as regards:
a) Protection of persons against contacts with or approach to live parts and against
contact with moving parts (other than smooth rotating shafts and the like) inside
the enclosure and protection of the machine against ingress of solid foreign
objects;
b) Protection of machines against the harmful effects due to ingress of water.
This Part gives designations for these protective degrees and tests to be performed to
check that the machines meet the requirements of this Standard.
2 Normative References
The provisions in following documents become the provisions of this Part through
reference in this Part. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Part, 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 755-2000 Rotating Electrical Machines - Rating and Performance (idt IEC
60034-1:1996)
GB/T 1993-1993 Cooling Methods for Rotating Electrical Machines (eqv IEC
60034-6:1991)
3 Designation
The designation used for the degree of protection consists of the letters IP followed by
two characteristic numerals signifying conformity with the conditions indicated in the
tables of Clauses 4 and 5, respectively.
3.1 Single characteristic numeral
When it is required to indicate a degree of protection by only one characteristic numeral,
the omitted numeral shall be replaced by the letter X, for example IPX5 or IP2X.
3.2 Supplementary letters
Additional information may be indicated by a supplementary letter following the second
characteristic numeral. If more than one letter is used, the alphabetic sequence shall
apply.
3.2.1 In special applications (such as machines with open circuit cooling for ship deck
installation with air inlet and outlet openings closed during standstill), numerals may be
followed by a letter indicating whether the protection against harmful effects due to
ingress of water was verified or tested for the machine not running (letter S) or the
machine running (letter M). In this case, the degree of protection in either state of the
machine shall be indicated, for example IP55S/IP20M.
The absence of the letters S and M shall imply that the intended degree of protection
will be provided under all normal conditions of use.
3.2.2 For air-cooled open machines suitable for specific weather conditions and
provided with additional protective features or processes (as specified in Clause 10),
the letter W may be used.
3.3 Example of designation