GB/T 24338.6-2018Railway applications -- Electromagnetic compatibility -- Part 5: Emission and immunity of fixed power supply apparatus and systems (English PDF)

Foreword

GB/T 24338 "Railway applications - Electromagnetic compatibility" consists of

the following parts.

- Part 1. General;

- Part 2. Emission of the whole railway system to the outside world;

- Part 3-1. Rolling stock - Train and complete vehicle;

- Part 3-2. Rolling stock - Apparatus;

- Part 4. Emission and immunity of the signalling and telecommunications

apparatus;

- Part 5. Emission and immunity of fixed power supply apparatus and

systems.

This Part is Part 5 of GB/T 24338.

This Part is drafted in accordance with the rules given in GB/T 1.1-2009.

This Part replaces GB/T 24338.6-2009 "Railway applications - Electromagnetic

compatibility - Part 5. Emission and immunity of fixed power supply installations

and apparatus". As compared with GB/T 24338.6-2009, the main technical

changes are as follows.

- MODIFY Chapter 2 "Normative references" (SEE Chapter 2; Chapter 2 of

the 2009 version);

- ADD the requirement of frequency range 5100 MHz ~ 6000 MHz of radio

frequency electromagnetic field immunity test (SEE Table 1);

- DELETE the requirement of limits for magnetic field emission of 9 kHz ~

1 Scope

This Part of GB/T 24338 specifies the electromagnetic emission and immunity

requirements for fixed power supply electronic and electrical apparatus and

systems in the railway system, including the apparatus's power supply, the

apparatus's own protection control circuits, as well as substations,

autotransformers, booster transformers, substation switch cabinets, local

electrical switches, and other trackside apparatus.

This Part does not apply to filters of which the operating voltage is the traction

power supply voltage (e.g., filters for harmonic suppression or power factor

compensation). Usually the filter requires a separate enclosure and access

regulations. If there is electromagnetic emission limit requirement, it will be

specified in the electronic apparatus standard.

The limits of this Standard also do not apply to telecommunications signals

intended to generate intentional emissions.

The frequency range considered in this Part is 0 GHz ~ 400 GHz. The frequency

without requirements does not need to be tested.

This Part applies to fixed power supply electronic and electrical apparatus and

systems in the railway system, including.

- Apparatus for powering the railway system in substations;

- Trackside control and rectifying apparatus, including devices for power

factor compensation;

- Power supply contact network along the track other than the current

collector and associated return conductor, including high voltage power

supply system in the substation used to convert traction voltage in railway

system;

- Trackside auxiliary power supply apparatus, including power supply to

freight marshalling stations, repair stations, and stations;

to conditional connection (GB/T 17625.2-2007, IEC 61000-3-3.2005, IDT)

GB/T 17625.7 Electromagnetic compatibility - Limits - Limitation of voltage

changes, voltage fluctuations and flicker in public low-voltage supply

systems for equipment with rated current <= 75 A and subject to conditional

connection (GB/T 17625.7-2013, IEC 61000-3-11.2000, MOD)

GB/T 17625.8 Electromagnetic compatibility - Limits - Limits for harmonic

currents produced by equipment connected to public low-voltage systems

with input current >16 A and <=75 A per phase (GB/T 17625.8-2015, IEC

61000-3-12.2004, IDT)

GB/T 17626.2 Electromagnetic compatibility (EMC) - Testing and

measurement techniques - Electrostatic discharge immunity test (GB/T

17626.2-2006, IEC 61000-4-2.2001, IDT)

GB/T 17626.3 Electromagnetic compatibility - Testing and measurement

techniques - Radiated, radio-frequency, electromagnetic field immunity test

(GB/T 17626.3-2016, IEC 61000-4-3.2010, IDT)

GB/T 17626.4 Electromagnetic compatibility - Testing and measurement

techniques - Electrical fast transient/burst immunity test (GB/T 17626.4-2008,

IEC 61000-4-4.2004, IDT)

GB/T 17626.5 Electromagnetic compatibility - Testing and measurement

techniques - Surge immunity test (GB/T 17626.5-2008, IEC 61000-4-5.2005,

IDT)

GB/T 17626.6 Electromagnetic compatibility - Testing and measurement

techniques - Immunity to conducted disturbances, induced by radio-

frequency fields (GB/T 17626.6-2017, IEC 61000-4-6.2013, IDT)

GB/T 17626.8 Electromagnetic compatibility (EMC) - Part 8. Testing and

measurement techniques - Power frequency magnetic field immunity test

(GB/T 17626.8-2006, IEC 61000-4-8.2001, IDT)

GB/T 17626.12 Electromagnetic compatibility - Testing and measurement

techniques - Ring wave immunity test (GB/T 17626.12-2013, IEC 61000-4-

12.2006, IDT)

GB 17799.4 Electromagnetic compatibility (EMC) - Generic standards -

Emission standard for industrial environments (GB 17799.4-2012, IEC

61000-6-4.2011, IDT)

GB/T 24338.1 Railway applications - Electromagnetic compatibility - Part 1.

General (GB/T 24338.1-2018, IEC 62236-1.2008, MOD)

A zone along the rail on either side of the rail, which is not more than 3 m from

the nearest rail centerline.

3.7 10 m zone

A zone along the rail on either side of the rail, which is more than 3 m but not

more than 10 m from the nearest rail centerline.

4 Emission tests and emission limits

1000 V, port emissions shall meet the limit requirements of GB 17799.4.

5 Immunity tests and test levels

This Part, according to the port type, specifies the immunity requirements and

test methods.

Appendix A

(Informative)

Emission during normal operation and switching operation within the

boundary of substation

The substation test includes measurement of emission of the substation.

For AC traction systems or DC traction systems, antennas are placed in a safe

position, to measure the peak field strength during normal operation and

switching operation of the substation. When the measured values of the AC

system and the DC system are close, the antenna is 3 m away from the switch

under test.

When using dipole antenna to measure, the center of the antenna is 3 m from

the ground.

On the dB/lg(f) graph, the measured values are taken as the two endpoints of

the line; and the distance is measured by reference to the point of apparatus

enclosure closest to the antenna.

Due to differences in configuration, rated power, and system voltage of the

substation, the emission limits cannot be specified. The data given in this

Appendix merely provides some reference information and is not intended to

be a basis for proposing limits. These data represent the performance of

apparatus of different ages and designs which is now applied to railway

substations.

REFER to GB/T 6113.101 to select measuring apparatus and measuring

bandwidth, and MEASURE the peak field strength of the emission. Based on a

large number of measurements, Figure A.1 and Figure A.2 show examples of

emission curves within the boundary of substation of 0.15 MHz ~ 1000 MHz.

The data in this Appendix only provides reference information and is not

intended as a basis for proposing limits. They only provide some information on

the performance of devices of different ages and designs currently being used

in substations.

There are obvious differences in the configuration, rated power, and system

voltage of different substations, so the emission limits of substation apparatus

cannot be proposed. The realization of electromagnetic compatibility of

substation apparatus depends on the detailed study of the characteristics of

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