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GB/T 18387-2008 PDF in English


GB/T 18387-2008 (GB/T18387-2008, GBT 18387-2008, GBT18387-2008)
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GB/T 18387-2008: PDF in English (GBT 18387-2008)

GB/T 18387-2008
GB
ICS43.020
T 09
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Replacing GB/T 18387-2001
Limits and Test Method of Electric and magnetic field
Strength from Electric Vehicles,
Broadband, 9 kHz to 30 MHz
ISSUED ON. JANUARY 22, 2008
IMPLEMENTED ON. SEPTEMBER 01, 2008
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
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Limits of Disturbance... 6
5 Method of Measurement ... 7
5.1 Measuring instrument requirements ... 7
5.2 Measuring location requirements for radiated emissions ... 9
5.3 Measuring location requirements for conducted emissions ... 9
5.4 Pre-scan procedure ... 9
5.5 Vehicle Measurements ... 10
5.6 On-Board Charger Measurements ... 11
Annex A (Normative) Rod Antenna Calibration – The Equivalent Capacitance Substitution Method
... 12
Annex B (Informative) Notes on Conversion of Limits for Measurement Distance from 10 m to 3 m
... 16
FOREWORD
This Standard modifies and adopts the American Society of Automotive Engineers standard SAE J551-5
JAN2004 “Performance levels and methods of measurement of electric and magnetic field strength from
electric vehicles”. Compared with SAE J551-5 JAN2004, the main technical differences and reasons are
as follows.
- In Chapter 2 “Normative References”, this Standard cites GB/T 4365 to replace the terms and
definitions of SAE J551-1; and cites GB/T 14023 to replace SAE J551-2; both of them contain
the same technical contents and are interchangeable. Delete the following publications that are
merely taken as references - “Federal Regulation No. 47 of the United States –
Communications; Part 15 – Radio frequency equipment” and “IEEE std. 291”.
- In Section 4.2 “Conducted emissions limits”, delete the requirements of 250 μV limit for
non-commercial areas. That is, the limits are unified, regardless of commercial or
non-commercial areas.
- This Standard adds a new Annex A “Rod antenna calibration – The equivalent capacitance
substitution method”. Derived from the version 2001 of this Standard, it is intended for guiding
the accuracy of measurement. And it is same as the Annex A in SAE J551-5 DEC1997.
Compared with SAE J551-5 JAN 2004, the difference of chaptering is as follows.
- This Standard combines the Chapters 6, 7 and 8 of SAE J551-5 JAN2004 which are related to
measurement method INTO Chapter 5 of this Standard. The corresponding sections are 5.4, 5.5,
and 5.6 respectively.
- A new Annex A is added in this Standard.
- Annex B of this Standard corresponds to Annex A of SAE J551-5 JAN2004.
This Standard specifies the limits and measurement methods of electric and magnetic field strength from
electric vehicles. The frequency range is 9 kHz ~ 30 MHz. It coordinates with the frequency range of
30MHz ~ 1,000 MHz specified in GB 14023 “Limits and methods of measurement of radio interference
characteristics of vehicles, motorboats and spark ignition engine-driven devices”.
This Standard replaces the previous version GB/T 18387-2001 “Performance levels and methods of
measurement of electric and magnetic field strength from electric vehicles, broadband, 9 kHz to 30 MHz”.
Compared with the previous version, the main changes of this version are as follows.
- In Chapter 1, further clarify the applicable scope of this Standard;
- In Chapter 2, add the references. GB 9254, ANSI C63.4, and ANSI C63.12;
- In Chapter 4, there is significant change of the disturbance limits for radiated emissions
(comparison between Figures 1 & 2 of this version AND Figures 1 & 2 of the prevision version).
Add Section 4.2 the limits of conducted emissions for battery-charging systems mounted on the
vehicle (see Table 3);
- In Section 5.2 of Chapter 5, the distance for measurement of magnetic field specified is changed
from 1 m ± 0.2 m (the previous version) TO 3 m ± 0.2 m (this version). Add new Section 5.3
“Requirements for measurement site of conducted emissions”. Sections 5.4 & 5.5 of this version
correspond to Chapters 6 and 7 of the previous version respectively. Add new Section 5.6
“Measurement of battery-charging systems mounted on the vehicle”;
- In Annex A, Figure A.2 is added;
- Add new Annex B “Notes on conversion of limits for measurement distance from 10 m to 3 m”.
Annex A is normative. Annex B is informative.
This Standard was proposed by National Development and Reform Commission (NDRC).
This Standard shall be administrated by National Technical Committee on Motor Vehicles of
Standardization Administration of China.
Drafting organization of this Standard. China Automotive Technology and Research Centre.
Main drafter of this Standard. Xu Li.
The previous edition replaced by this Standard.
- GB/T 18387-2001.
Limits and Test Method of Electric and magnetic field Strength
from Electric Vehicles, Broadband, 9 kHz to 30 MHz
1 Scope
This Standard specifies the limits and test method of radiated emissions of electric and magnetic field
from electric vehicles over the frequency range of 9 kHz ~ 30 MHz, and the limits and test method of
conducted emissions over the frequency range of 450 kHz ~ 30 MHz.
Conducted emission measurements in this Standard are applicable only to battery-charging systems
which utilize a switching frequency above 9 kHz, which are mounted on the vehicle, and of which the
power is transferred by metallic conductors. Conducted emissions requirements apply only during
charging of the batteries from AC power lines.
Conducted and radiated emissions measurements of battery-charging systems that use an induction
power coupling device are not covered by this Standard.
Note. GB 14023 shall govern, in the case of measurement of electromagnetic disturbances over the frequency range of 30
MHz ~ 1,000 MHz.
2 Normative References
The articles contained in the following documents have become part of this Standard when they are
quoted herein. For the dated documents so quoted, all the modifications (excluding corrections) or
revisions made thereafter shall not be applicable to this Standard. For the undated documents so quoted,
the latest editions shall be applicable to this Standard.
GB/T 4365 Electromagnetic compatibility -- Terms [ GB/T 4365-2003, IEC 60050 (161) .
1990 + Amd. 1.1997 + Amd. 2 . 1998, IDT ]
GB/T 6113 Specifications of equipment for the measurement of radio disturbance and
immunity [ GB/T 6113-1995, idt CISPR 16-1 . 1993 ]
GB 9254 Information technology equipment – Radio disturbance characteristics –Limits
and methods of measurement [ GB/T 9254-1998, idt CISPR 22 . 1997 ]
GB/T 14023 Limits and methods of measurement of radio interference characteristics of
vehicles, motorboats and spark ignition engine-driven devices [ GB/T
14023-2006, CISPR 12 . 2005, IDT ]
ANSI C63.4-1992 Methods of measurement of radio-noise emissions from low-voltage electrical
and electronic equipment in the range of 9 kHz ~ 40 GHz
ANSI C63.12-1987 Electromagnetic compatibility limits – Recommended practice
B.1.3 Conversion of limits when f > 15.92 MHz
Whereas both distances of measurement (i.e., 3 m and 10 m) fall within the far-field area, the conversion
of limits presents a certain proportional relation with the distance.
B.2 Limits for magnetic field
Likewise, the original recommended limits for magnetic field strength of peak impulse come from the
technical paper of Georgia Institute of Technology, expressed in dB(μA/m/kHz), and assuming the
measurement at a distance of 10 m.
Where.
f – Expressed in kHz;
Z0= 377 Ω.
Whereas the boundary distance of near/far field is identical for electric and magnetic fields, assuming the
measurement at a distance of 3 m, the limits for electric and magnetic fields may be correlated via the
wave impedance of free space.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.