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Common mode disturbances in the frequency range 0 Hz to 150 kHz Immunity

　　1. Overview

　　IEC 61000-4-16/ GB/T 17626.16 specifies the test requirements and methods for common mode disturbance immunity of electrical and electronic equipment within the frequency range of 0-150kHz, with the purpose of verifying the immunity of electronic and electrical equipment to currents such as those from power lines and the performance of conducted common mode disturbances such as loop leakage current in the grounding system.

　　The test does not apply to ports where the connecting cable is less than 20 meters.

　　This standard also applies to modules and subsystems if the rated power of the EUT is greater than the capacity of the test generator.

　　Methods of injecting interference:

　　-Direct injection method [only applicable to coaxial shielded cables]

　　-Coupling and Decoupling Network (CDN) injection method

　　Test level:

　　1. Voltage levels of power frequency DC, 162/3Hz, 50Hz and 60Hz:

test level

Open circuit test voltage /V ( rms )

1

1

2

3

3

10

4

30

X

special

X: is an open level that can be specified in product standards

　　Table 1: Persistent harassment levels

test level

Open circuit test voltage /V ( rms )

1

10

2

30

3

100

4

300

X

special

X: is an open level that can be specified in product standards

　　Table 2: Short-term residence harassment levels

　　2. Test level in the frequency range of 15Hz - 150kHz:

　　The relationship between test voltage and frequency is as follows:

　　• 15Hz ~ 150Hz, the voltage is reduced by 20dB/decade

　　• 150Hz ~ 1.5kHz, voltage constant

　　• 1.5kHz ~ 15kHz, voltage increases by 20dB/decade

　　• 15kHz ~ 150kHz, voltage constant

　　The test voltage is shown in the figure below:

　　2. Test system diagram:

　　3. System configuration and description

serial number

product

illustrate

brand

3.1

CWS500N4

Ultra-small common-mode conducted interference test equipment in compliance with IEC 61000-4-16 standard Built-in low-frequency signal generator and low-frequency amplifier Frequency scanning range 15Hz - 150kHz Built-in rectifier module for DC testing Built-in voltmeter (rms value) Built-in semiconductor The power switch is in continuous mode and short-time mode, and the test frequency is DC , 16 2/3Hz , 50Hz and 60Hz . The USB interface test software supports Windows Vista/Windows7 system

EM TEST/Switzerland

3.2

ACS 500N2.3

 AC voltage source, 0-330VAC/2KW, 0Hz/10Hz - 80Hz , electrically isolated, controlled by CWS500N4 via 0-10V analog output signal

EM TEST/Switzerland

3.3

icd.control

Remote control operation software with built-in standard library for convenient testing and report output

EM TEST/Switzerland

3.4

CN 16-L2/L4

2- wire /4- wire coupling network, replaceable, 300V AC/DC

EM TEST/Switzerland

3.5

CDN 16-T2

2- wire (communication line) coupling network, 0 - 60V DC/2A

EM TEST/Switzerland

3.6

CN 16-L8

8- wire coupling network, 0-330V AC/DC

EM TEST/ Switzerland

3.7

CN 16-L3

3- wire coupling network, 0-330V AC/DC

EM TEST/ Switzerland

3.8

EMS-TAB

EMS test environment, including test table, horizontal coupling board, insulation support, etc., including vertical equipment / desktop equipment. Specifically includes a 2.02*1.02*0.8m solid wood test table, a 2.0*1.0m*1.2mm thick galvanized steel plate; 3m*2m , thickness: 1.2mm , a set of hinged ground reference boards; 2 meters of copper braid 1 grounding wire ; 2 grounding copper noses ; 4 sets of M8 wing nuts, bolts (length 25mm ), flat gaskets ; 2 sheets of EPE pearl cotton 110*50*5cm ;

Wisdom / China

3.9

Control-tab

computer

Wisdom / China

Century Wisdom (Suzhou) Testing Technology Co., Ltd

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