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Low voltage DC power

Part 3: Electromagnetic compatibility(EMC)

GB This section 21560 specifies the power level does not exceed 30 kW,an input AC or DC input voltage is not more than 660 V,the DC output voltage does not exceed 250 V power source of various means(PSU)of the electromagnetic compatibility(EMC)requirements.

Power supply means operate independently, or other devices installed in adequate electrical and mechanical protection are –

for some special industrial applications (e.g. chemical and metallurgical) power supply apparatus used, there may be other products EMC standards. At this time, perform this section may also perform those products EMC standards ^

many of the power supply apparatus is as relating to different EMC used part of a large apparatus standards, following a) and b)show power classification and EMC scope standards. A detailed breakdown of the power supply, see Appendix A.

  1. Expected power (a separate instrument)independent

This section applies to the power supply means as a unit and having a direct function of development, especially in a separate unit on the market

  1. “Component supply be divided into two operation:
  • the power supply member regarded as of the instrument

Present part deemed suitable instrument (e.g., intended for the facility or sold to the public) part of the power supply device,which EMC by the instrument equirements considered for use without additional prepended EMC tests. this does not include a maintenance spares sales the power supply device, which has been carried out as a member of the test machine

  • “Is intended for professional assembly / installer component supply

section applicable to this kind of power, but help to meet different standards for the relevant end product EMC requirements. such parts supply is expected. these products may be sold by the end of tantalum professional installation personnel who install terminal products to professional assemblers, or delivered to wholesale markets. in both cases, the user of the end product is not only to fulfill its own responsibilities. after assembly further assumed that EMC tests

Note:the power supply device member people end product, emission value Can be changed (e.g. due to changes in the ground conditions).

Purpose of this section is to define the power supply EMC and test methods for limits device,comprising one thousand possible interference to other electronic devices (e.g., a radio receiver, a measuring device and a computer apparatus) electromagnetic emission limits, and a continuous, transient conduction disturbance and radiated disturbances (including electrostatic discharge) immunity electromagnetic limits.

this part of the predetermined minimum power supply device EMC requirements.

comply with this section, no require additional EMC tests, nor beyond the portion of the necessary.

2 normative documents

References the following  are incorporated by GB reference in this section 21560, constitute provisions of this section. dated references, which then All amendments (not including errata content) or revisions do not apply to this section, however, encouraged to whether the latest versions of these documents are part of the parties to this agreement. undated references, the latest version applies to this 2900. 33-2004

GB / T part.term Electrical power Electronics 60050- (IEC 551: 1998 and  IEC 60050-551- 20: 2001, IDT)

D 2900. The term electromagnetic Electrotechnical 60-2002(eqv

IEC 60050-121: 1998) GB / T semiconductor converter of basic requirements(eqv

IEC 60146-1-1: 1991) GB 4343. 1 electromagnetic compatibility appliances, electric tools and similar apparatus Part 1: Emission (CISPR 14 ~ 1: 2000,

term & Electrotechnical electromagnetic compatibility (IEC 60050-161: 1990, IDT)

industrial, scientific and medical(ISM)radio disturbance characteristics limits apparatus and methods of measurement(CISPR 11: 20〇3,16113.1-

GB / T DT)1995 radio disturbance and immunity measuring apparatus specifications

GB 9254, -1998 limits and methods of measurement harassment radio information technology equipment(IDT

CISPR 22: 1997) GB / T General Requirements 1 and 2000 detects a calibration laboratories(IDT ISO / IEC 17025: 1999)

GB/ T 16935.1-1997 with the insulating first part of low-voltage systems: principles, requirements and tests(IDT

IEC 60664-1: 1992) GB / T low voltage DC power supply of the performance apparatus to be (IEC 61204: 2001, MOD)

electromagnetic compatibility limits for harmonic current emissions (equipment input current

<16 a) (IEC 61000-3-2:

electromagnetic compatibility limit of having a rated current  16 a voltage the device= in the low-voltage supply system fluctuations and flicker in limit(idt

IEC 61000-3-3: 1994) GB / T electromagnetic compatibility test and measurement techniques electrostatic discharge immunity test(IDT

IEC 61000-4- 2:. 1995) GB electromagnetic compatibility test and measurement techniques RFEMS Test

(idt 1 EC 61000-4-3: 1995)

electromagnetic test and measurement techniques compatible with fast transient electrical pulses immunity test Cian

IEC 61000-4-4-.1995) GB / T    electromagnetic compatibility testing and measurement techniques surge (impact) immunity test( idt IEC


S 1000-4- 5: 1995) GB /test the electromagnetic compatibility and radio frequency field measurement techniques conducted disturbances, induced immunity(IDT

IEC 61000-4-6! 1996) GB / T Electromagnetic compatibility Testing and measurement techniques – Voltage dips, short interruptions and voltage variations immunity

tests(idt  61000-4-11: 1994)

IEC60〇5 IEC-131 billion International Electrotechnical dictionary(IEV)Part 131: Circuit theory

60050-151 IEC International Electrotechnical dictionary(IEV)Zi section 151: electrical device and a magnetic device

3 and the terms defined

GB / T 2900.33. GB / T  /,/ T 3859.1 GBand IEC60050-151 is defined given as well as the following definitions apply to this section.

  1. T

ambient environment

  1. 1. 1

residential environments residential environment

is directly connected to all domestic low-voltage power supply utility facilities. Protection from 10 ni,about the size of the room.

3.1 + 2

commercial and light industrial environment, commercial and light industrial environment

are not necessarily all connected to a common low-voltage power supply and light industry commercial facilities. The desired status broadcast radio and television receivers use, protection the distance of 10can be m or 30 m.


  1. 1.3

Industrial environment industrial environment

is not directly connected to a common low-voltage power supply of industrial facilities, large houses due PROTECTION distance 30 m.


protection zone protection distance

from the electronic or electrical devices. Within this distance, the interference level should not affect the use, such as broadcast radio and other electronic or electrical device such as a television receiver.


Distribution System distributed power system

by the power distribution bus to supply power to a fixed power converter system.


port port

Product-specific interfacewith an external electromagnetic environment.

Examples of ports:

input cross Su  port DC input«U the ground port


port of the housing enclosore port

Physical interface power supply device products. Emitting an electromagnetic field through which the mount of the power supply device or invasion by products.


signal or control line port signal or control line port

provides diagnostic or low power level control information is input or output port.


DC input port dc * input power port

connected to external DC power supply port.


DC output port dc Output power port

DC power output port connected to the outside.


AC input port Sapporo c. Input power port

terminal connected to external AC power supply U.


Power(device)power supply; PSU

the input electrical energy into one or more output power of the electric or electronic device.


Power member component power supply

a modular power supply device modular PSU The power supply device sub-unit sub-unit PSU


for providing or changing the electrical energy from the electrical means and / or the electronic device thereof. They are not expected to operate independently, by a professional assembly / installation personnel charged with the end product.

3 2

independent power stand alone power supply

expected in the end product laboratories, workshops and other places to use the stand-alone application. A housing having a full, effective electrostatic discharge protection member and the end-user touch dangerous. Typical examples include an adjustable output or non-adjustable desk, in-line, separate and wall products.


Desktop power bench-top power supply

A power supply device is expected to place an independent laboratory or the like for use. Sometimes with secondary means monitors and measures.


OpenPower board open card power supply

Frameless power frameless PSU

fixing the printed circuit board without metal stents. As part of the power supply device is expected to use the professional assembly.


open frame power open frame power supply

is typically mounted on a printed circuit board metal support. The metal stents used in the equipment rack fixed professional assembly personnel, but also for cooling of power semiconductors. Further, for security reasons and / or to reduce radiation interference considerations, the cover can be used.


Plug Power Board plug-in card power supply

plug to the power supply on the expected submount. The board can be designed as an open type, open frame or box. Usually assembled by a professional staff.


Closed/ power cartridge enclosed / cased power supply

fully enclosed/ cassette / hood-type power supply device. Using the cover as a heat sink or forced air cooling using fans.


Powerline pln ^ top (direct plug in) power suppSy

with a main power supply voltage of the plug.

  1. 5.9

uninterruptible power supply equipment unintemipti Me power SuppShuy; UPS

expected to provide power when the power supply of mains failure. Usually run as an independent.


end products end-product

designed for independent application of finished product, the end user may directly operate to use and is expected to market 9 and / or delivered as a single device, or as part of a delivery system or facility.


System system

Interconnect fixed combination product, easy reconfiguration. Typical examples include: computer mouse, keyboard, printer and display, hi-fi systems, video recorders and televisions.


Facilities installation

of a set of interconnect products, is not easy to reconfigure. Typical examples include industrial production line facility or power plant control facilities.


With non-prof ^ siona 1

assumes that a person or organization with little or no technical knowledge or tools and equipment. 3.10

professional assembly /installers professional assembler / instaHer

technically competent, able to correctly assemble the component parts and / mounted to the end product, end product or assembled / mounted systems or facilities, while full compliance with the end product, the technical system or facility requirements and law person or body.


rated full-load full rated load

marked product offered maximum continuous power or average power suspension.


power supply mains supply 3.12. 1

Industry power supply industrial maim supply

Separately power to the commercial power supply &

3 12.2

dedicated power supply private mains supply

not directly connected to the local power utility grid (such as a generator or UFSh 3. 12.3

utility power supply public mains supply

Power provides electrical power to residential, commercial, light industrial environment or general public use.

  1. 13

critical frequency power supply device Critical frequency of a PSU

wavelength is equal to 4 times the frequency of the longest side length of the power supply device.

4 different power test applicability of techniques

generally large technical differences between various power devices. All the power supply device is applied indiscriminately all EMC tests, neither reasonable nor necessary.

Test listed in Table 1 is applied to a power supply device and a visual component to operate independently of the power supply device with the instrument (see Appendix A).

The power supply device for components intended for use by professional installers, Table 1 can be used as guidelines.

Module test scope

group using art-emitting immunity Notes
6.2 6.3 6.4 7
I , used in printed circuit boards with pins or screw connections notmeasurements recommended recommended recommend These are member electrically Wolf
n ferromagnetic resonance rectifier or power supply apparatus with filtered mandatory mandatory not measured Measured not ifonly harassment rectifier
m AC / DC power supply device a linear force force Exceptfi force without switching•
IV DC / DC converter, powered by a battery or a rectifier ExceptS recommended mandatory mandatory no main rectifier, not directly connected to the AC power supply
V I,n[oriv* group does not cover the AC / DC power supply means mandatory mandatory mandatory mandatory

when within system or product GB 4343.1, range group DI the power supply device according to the standard test catching rabbits a






  • – general requirements and test conditions

5.1  – as in claim

power supply device manufacturer is responsible for providing product-related performance Guide.EMC,application, environment information is expected and installation  ”

test conditions 5.2

the test shall be recommended by the manufacturer of the circuit and the installation instructions are not linked other than the manufacturer.

configured power supply device, side Electrical Test conditions and operating conditions are known to be representative of the most severe cases otherwise, all measurements should be rated nominal input voltage, the rated full load and ambient temperature ~35C15X:.Shall case where the power supply device. the normal operating temperature.

assumed that the load does not generate any electromagnetic interference. load resistance available fan or a cooling liquid,

all the tests specified in this section merely type test

When measured by the specified test method, apparatus should meet the requirements,

are not required nor necessary additional carried out from under this section EMC tests should

be taken to prevent immunity test specified by the test apparatus of the present sub-portions become dangerous or unsafe.

6 emission requirements

when the cable arrangement is known, if applied, should it. If unknown, is shall be 6.3,and 6.4 selected cable arranged in the measurement conditions described in the document should be

6.1 environmental regulations limit

May power supply apparatus installation environment classified as follows:

-.residential environments

examples of typical for residential premises real estate, such as houses, apartments;

– examples of commercial and light industrial environments typical places are:

* retail outlets, such as business And supermarkets;

<< firms, such as offices, such as hairpin line;

* public recreational facilities such as cinemas, public bars, dance halls and so on;

■ outdoor places such as gas stations, car parks, amusement and sports centers;

■ light industrial premises, for example, workshops, laboratories, service center, etc.

eleven industrial environment

the above-mentioned environment limits given below,in Appendix its outline is given G,

  1. fl Blimits

satisfy the B-level The power supply device limit is defined as a B Class device. Their intended residential installation ^

For the power supply device installed in commercial or light environment, when the power supply is directly connected to the common interconnect residential environment, also require B Class limit.

6.1.2 A Class value

Satisfies A power supply apparatus Class limit is defined as A Class devices. They expected in a commercial, light industrial or industrial environment, not directly connected to the common power supply interconnect residential environment.

A Class devices which shall be recorded in the following description file:

dim Advertisement: _ This is a kind of a A Class product for use in residential, commercial or light environment may cause radio interference. This product expected

is not a residential installation. When installed in a commercial and light industrial environments connected to the common power supply, the user may be required to take adequate






measures to reduce interference

Supplier recommendations, is responsible for the installation environment EMC product by the user.

6.1.3special application

Only relates to industrial environments where a large current (greater than 25 A)is connected to the input device or industrial power supply dedicated power supply problem. Its protection from more than 1〇〇 in.

Limits are under consideration.

For these applications, it should be clear restrictions on the use of a warning device in the ACCOMPANYING DOCUMENTS.

user,for example,S

allows a an internal radio interference within acceptable limits and external interference (e.g., power supply is not connected to the common power supply>;

– in the power facility, and EMC safety requirements contradictory requirement sphenomena.

6.2low frequency(/ <9 kHz,the AC input only)

6.2. 1 commutation notches

only to a power supply apparatus main current commutation herein. power supply device is designed as a line commutated if connected to a high impedance source, may cause commutation notches. measurement and calculation were not mandatory information and suggestion sin Appendix are given B.

6.2.2 harmonic current harmonics and

Inter-connected to a common power supply and a rated input current iS A power supply device and below which limit sin GB17625. given  1. This requirement applies to GB 1762S.the part of the instrument and the instrument deemed 1 covers, but is not required to control the power supply device will use the product area harmonic limits is not mandatory.

Harmonic measurement is sensitive to a voltage source, especially in the power supply device. In many cases, utility power supply is not suitable for this purpose. Thus, use one of the following methods:

  1. Using line with GB the common power supply power requirements 17625.1

– rated full load operation power supply device, harmonic limits the voltage source should meet the requirements;

  1. Conforming GB17S 1 claim Artificial power;
  2. calculated or simulated consider the following factors:

-ideal sine wave voltage source F

– the grid frequency from the frequency range 40 to harmonics, the most severe case where the internal impedance of the power supply device.

Inter-harmonic may be generated under certain load conditions. This section does not consider this situation. The problem with this aspect of the system is the responsibility of users, installers or assembly personnel. Recommendations, see Appendix C.

6.2.3 voltage fluctuations and flicker

and connected to a common power supply rated input current of 16 A and the power supply device which limit sin GB17625. given  2. This requirement applies to GB the part of the instrument and the instrument deemed 17625.2 range covers, but is not required to supply the control means limits voltage fluctuations and flicker is not mandatory to use areas.

For the power supply means need only be measured or calculated maximum relative voltage change

Note: the magnitude and duration of the recommended amount Kinji Fuchikami inrush current and calculate the square of an rms value of the period after turning on – duration of inrush current power supply device most shorter than 1〇 ms,which means that a large inrush current is still below the limit.

Fluctuations in the power supply device may cause the input current due to time varying load. The problem with this aspect of the system is the responsibility of users, installers or assembly personnel.

  • Conducting high-frequency phenomenon 3.1a high-frequency line conducted phenomenon

conduction emission test shall be GB 9254 carried out, according toorin industrial GB 4824 applications,however, does not exclude the industrial

Use in GB 9254 applications.

Appendix H in Table His a value.1list.

For DC input, see Appendix D.

phenomenon is the high frequency conduction 6.3.2DC output port not

This part of predeter mined does  occur when the high frequency conduction phenomena, limit load terminal disturbance voltage DC output port.

In some cases, manufacturers and users may need to reach agreement on the limitu

Note: the manufacturer’s recommendations given recommendations on how to prevent the application from the load cables to supply power fermium in the file.

6.4 high-frequency radiation phenomenon

radiation test according to GB using an antenna 9254 test, or by/ T 6113. GB1 using the methods and restriction absorbing clamp 6. explaining 4.3>

test method adopted by the manufacturer when the dispute, the manufacturer must demonstrate and document the test report select one thousand interference power measurement is correct ^

Appendix H table H.2 is a list of limits.

6.4. Test 1 using an antenna

radiating disturbance tests shall GB for 9254.

The load of unknown length to 1cable should be m length of the arranged horizontally, and are equally spaced from each other,

the main cable to 1 m length of the horizontal arrangement, and the connected to the power from the square of the perpendicular to the ground. 8                                                            shield is not line unless the power supply

Device power supply shielded cable4

to any other arrangement should prove correct, and described in the document.

If Appendix H Table.H2 limits, the distance between the antenna and the power supply apparatus should be 10 m.

distance 30 m,Measuring to reduce the value 10 dB.

measuring distance 3 m,When the increase value 10 dB.

6.4.2 absorbing clamp method using test

measures the quasi-peak detector receiver should be, and in accordance with/ T 6113. GB1 requirements “should absorbing clamp/ T 6113. GB1 based sauce and calibration

NOTE:absorbing clamp is generally applicable to l square m radiation field

distribution measurement procedures and see the child

test power supply unit and should be placed in cable high 0.8 RA,a non-metallic table and other metal objects from at least 0.8 measured in a non-metallic cable secondary table Fair growth of at least5 m,a straight line of so as to move along the absorbing clamp cable clamp should be absorbed through the correct orientation and placement of C the current sensor power source deviceside).

All other cables may not be connected (if these cables still not maintaining proper equipment running), or disposed close to the power supply device ferrite absorber tube (clamp)

“Is sequentially testing each cable of the power supply device. longer than 5 am the cable should be above 5 m test test cable layout unwanted . the cable configuration is not critical to

normal application, Zhang duo xian zhi within 5 m cable  a test as follows:


25 m:Chang duo xian zhi:measurement completely;

-<S:extended to ^

->5:entire length Measuring

hereis twice the length of the absorbing clamp.

During the test, the absorbent clamp moves along the cable under test, the power supply device from abutting at beginning till maximum 5 m.the From zero to half the amount of movement of the test frequency wavelength. using an absorption maximum clamp correction factor to convert the readings to disturbance power should be less than the maximum of all Appendix equipment; H the tables in




EUT- test

AE-;related equipment

FT… same type ferrite tube (and absorbing clamp  – FT* – if necessary,is related to the decoupling device further additional ferrite tube

the test layout Shu Shu disturbance power amount “FIG

6.4.3 most application limit  slaughter interference power measured

at the longest side length of the housing of the measured frequency exceeds the maximum a under the premise/ 4, the interference power measurement can be replaced by a strong launch (by / T GB 6113.1).

most of the power supply apparatus does not transmit the interference power exceeds a critical frequency (critical frequency power calculating means Appendix E).

some power means can transmit power exceeds a critical frequency interference, especially when the clock frequency of a logic circuit using  than 1  more MHz,

and therefore, Gao pilot power applied test method is limited to a power supply device not using screen Cables and the following conditions:

  • A – is less than the maximum length of the longest side of the test frequency V4f is lower than the clock frequency of 1 MHz;

-output;less than 5-way

  • wire diameter is too large because not preclude the use of absorbent clamp.

7 immunity required

7.1performance criteria

performance criteria for checking the power supply device is applied to the external disturbance protection, see Table 2.

EMC from the point of view, any program comprising power supply apparatus as intended to be included.

If Since the results of the tests carried out according to the predetermined part is: power supply means is dangerous or unsafe shall be considered non-art power supply device through tests showed criteria.

2the power supply apparatus resistance to electromagnetic interference test criterion

a B C
substantially coriander seeking is not lost during the test or functional Temporary

function has during testing

Occurred or performance loss of function,is not
performance or performance loss self,but can be restored Self-recovery purposes, but not damaged
notes within a predetermined tolerance band  intended


after the test, the power supply apparatus should be run continuously as expected. Reduced performance of that manufacturer should predeter mined allow any reset conditions, including down






various performance criteria listed in the table below minimum requirements.

These limits have been set for the application may not have a strong impact level. For some applications, it may be necessary by the user and the supplier on a higher level reached by the meeting.

DC / DC converter See Appendix D.

7.2 Basic immunity requirements, harassment frequency

Reference based on the standard test program in Table 3 to Table 10 is given by the item number. Note!7; / 7 \ refers rise time and pulse duration (50% of the value), such as & 3 / D 17,626.4 the

“Intended use of the AC / DC power adapter, DC input port of the instrument, the manufacturer should be required , surge (shock) test.AC power AC / DC adapter input

7.2. 1 severities low

levels applied to these power supply apparatus contemplated for use in residential, commercial, and light industrial environments terminal.

tABLE 3 anti disturbed degree – housing port


entry number environmental phenomena item Test condition technical unit protocol Notes performance criterion
contact discharge 4 Disabled kV a
3-1 electrostatic discharge Disabled 17626.2 kV 8GB / T B
discharge air
Radio fields frequency 80 ~ 1 billion thousand and MHz b
3-2 field 3 V / ui GB / T 17626.
AM AM a kHz) 80%
RF electromagnetic frequency 900 disabilities 5 MHz d
field  3 V / jn GB / T 17626,3
type carrier duty 50%
repetition frequency 200 Hz

aofrack power unit cover open, electrostatic discharge test impractical, it is not necessary for “bdoes not characterize the level of the power supply device against the receiving machine emitted field Ge.

test unmodulated carrier wave power rms predetermined level. dEuropean test apparatus for testing should be carried out at a frequency within the designated range,-



an immunity Table 4 of the signal line and the control line port

numberXu environmental phenomena TestitemsB Test condition technical Unit Testscheme Notes performance criterion
Peak phase voltage disabilities 0-5 kV a B
il fast transients 17626. ns 5/50GB / T4 using a capacitive clamp
repetition rate 5 kHz
frequency 0 • 15 ~80 MHz
4-2 continuous conductive RF amplitude 3 V GB /
T 17626. 6 b B AM (1
suitable total connection cable length only by the functional specification for the manufacturer can exceed the 3 port ofm.
b test level of a predetermined carrier wave unmodulated root mean square value.

tABLE 5 immunity – DC input and output ports



does not apply to the following requirements must be disconnected from the device intended to be connected when the battery or recharging rechargeable batteries limit input port for specific applications, may not be predetermined. full. see Appendix IX

item No. environmental phenomena item test technical conditions unit protocol Notes performance criterion
peak phase voltage persons 0.5 kV a B
5-1 fast transient T r / r b 5/50 ns GB
repetition rate of 5 kHz









item No. environmental phenomena pilot project test specifications unit protocol Notes performance criterion
5-2 surge(impact) ./TT,

Zheng values spider voltage values of the line voltage is

1.2 / 50 (8/20) 0.5 Soil disabilities  


 0- 5 kv kV GB / T 17626. b B
5-3 continuous conduction radio frequency



AM (1 kHz) 0 • 15





immunity table 6 – AC input port

entry number environmental phenomena item technical test condition unit protocol Notes performance criterion
peak phase voltage 1 persons kV B
6-1 fast transient T t / T h 5/50 ns GB
repetition frequency of 5 kHz
Tr/T h L 2/50 (8/20) flS a
surge (impact> peak phase voltage soil 17626.5 kV GB / T Z
peak line voltage of 1of soil kV
to reduce the amount 30% B
6-3 voltage dip duration reducing the amount of  




 10 60 ms% GB / T 17626.11
duration 100 ms
6 4 voltage interruption * reduce the




95 5 000% ms GB /
frequencies 0,15 ~80 miz b B
6-5 consecutive RF conducting voltage
3 V GB / T 17626. 6 AM



2.2 human high severities
Table 7 Immunity – Enclosure portsuch apparatus for power level contemplated for use in industrial environments. Of harassment exceed the following levels, the solution is negotiated by users and suppliers ^

item number Environmental phenomena of pilot projects testing technical condition of the unit test program Remarks Performance criterion
7-1 electrostatic discharging Connection i the discharge

air discharge

Disabled Disabled 4  


 8 kV kV GB / T 17626. 2
Radio electromagnetic field frequency 80 ~1 000 MHz b B
7-2 field strength of  10 V / m GB / T 17626.
amplitude modulated AM 1 kHz of 80%





item No. environmental phenomena item Test technical conditions unit protocol Notes performance criterion
7-3 type field RF carrier frequency fieldworking system repetition frequency soil900  

5 10 50 200 MHz V / m



d B
apower supply device for catching rabbits open frame, electrostatic discharge test impractical, it is not necessary,

15the electric field hardly against the power supply apparatus characterized transceiver transmitted. eTest predetermined level unmodulated carrier wave rms.

D This test applies only to European countries. The test shall be carried out at a frequency within the range indicated in-

Table 8 immunity  signal lines and the control line port

entry number environmental phenomena Item Test Condition Technical Unit protocol Notes performance criterion
peak phase voltage ± 2 kV a B
8 -1 fast transients even Tr/Tb using capacitive clamp
the repetition frequency 5 kHz
Radio common mode frequency 0_ 15 ~80 MHz B
8-2 «avalue of 5/50 ns GB / T 17626. 4 10  17626. 6 b
AM quantity of modulated 80
a only in the connection total cable length according to the manufacturer’s functional specification 3 may exceed m of terminal
b test level the predetermined unmodulated carrier wave rms.



Table 9 Immunity – DC input and output ports

of the following requirements NAT must be expected port and the input device is disconnected rechargeable battery or rechargeable battery is connected. For some special applications, the specified limit may not be sufficient. See Appendix D.

Item No. environmental phenomena TestItemg Test specifications Unit protocol Notes performance criterion
peak phase voltage 2Soil kV a B
9-1 fast transient T, / Tk 5/50 ns GB /
the frequency of 5 kHz
Tr/ T h 1.2 / 50 (8/20)
surge (impact) peak phase voltage Disabled 17626.-S kV GB / T 05
peak voltage of line Persons 0.5 kV
frequency 0.15 ~ S 0 MHz a, cd B
9-3 continuous conductive RF amplitude 17626. V GB / T 106
AM a kHz) 80%



Table 10 Immunity – AC input port suit case


entry number environmental phenomena Item Test Condition Technical Unit protocol Notes performance criterion
peak phase voltage ± 2 kV B
10-1 fast transient Tr/Th 5  50/17626. ns GBT /4
repetition rate 5 kHz



item No. environmental phenomena item Test condition technical unit protocol Notes performance criterion
TJT h 1.2 / 50 (8/20)
surge (impact) peak phase voltage Disabled 2 kV GB / T 17626. 5
peak line voltage of Soil 1 kV
Reduced S 30% B
10-3 voltage drop to reduce the duration  




S 10 60 ms% GB / T 17626. 11 C
voltage interruption reducing the amount of




95 5 000% ms GB /
frequency 0.15 ~80 MHz h B
10-5 continuous RF conduction voltage
 10 V GB / T 17626.6 AM (

certain industrial environments may requirements than from the upper limit4 btest a predetermined level unmodulated carrier wave rms.



8 and form tantalum modular power supply device engagement 8.1

is configured primary circuit or a single module and separate modules output of synchronous or asynchronous power supply apparatus of a single unit, should be as a single component type or instrument type power supply device to meet the requirements of this section.

8.2 system of power

System consists  a plurality of supply devices in series, or in parallel with a single input coupled consisting of easily reconfigured, should the instrument-type or as a single component type power supply device comply with the provisions of this section to ensure compliance with this specific end product or”EMC standards is the responsibility of the system supplier. 8.3 Power facilities

supply device is used in a large number of- a facility, and the AC or DC power distribution system, it becomes an electric power facility. Such configurations not easily reconfigured. Each individual power supply device shall comply with this section, the power supply device manufacturer responsible for this, and should provide information on the correct installation of their products. The final facilities by EMC issue installed  a professional staff responsible for consideration.

8.4distribution power

The which is a DC or AC power facilities can be allocated to a single power conversion unit near the required power supply circuit or module installed. Where appropriate, this part applies to individual products.the whole system or facility EMC performance of by professional installers.

8.5  series or in parallel

Power or in series means to form sold in parallel, which documents shall include on such configuration expected.EMC information performance  Group supply 9

powerpower supply apparatu shaving similar characteristics of a plurality of group configuration.

measurement group in all power EMC performance devices,neither economical nor necessary.

Responsibility of the manufacturer is to determine the power supply unit in the entire family and their representative test should prove that the decision made was correct in the test report.

See Appendix F.

This section considers the measurement uncertainty limits.



Thus, a product sample measured values should be compared directly with the limit value.

A product sample mean is a

“-controversial, they should adopt GB / T S 113.1-1995.80% / 80% of a predetermined criterion

NOTE:uncertainty parameter associated goods 3 is a junction Gao, characterization and properties of considerable value dispersion relations, press GB / T 1S481 uncertainty expressed by the skin and non-ideal random effects correction of systematic shaggy ring. cause.


EMC improvement measures shall be without prejudice to the safety requirements. For example, affect the contact current power supply filter,EMC shielding may affect the clearances and creepage distances.

Since immunity test apparatus not specified in this section become dangerous or unsafe. Therefore,related to EMC tests should be carried out prior to or concurrent safety type test pattern compliance. As long as because the EMC the equipment test any changes, they should be check the compliance requirements for product

12 Test report The

test results shall be submitted in the form of a test report safety.

The test report shall be given sufficient product identification and test data, and should be clear, clear, objective test to show all the relevant information such as load conditions, the length of the cable, grounding and the like.

Functional description of the protocol, including the test equipment, cable management and operation mode of the test or the like, should be given.

Detailed definition of the grounds and selected acceptance criteria shall be provided by the manufacturer, and stated in the test report.

The test report shall be given corresponding measured values and limit values for each test –