background image

 

Page 14 of 17

 

INSTRUCTION MANUAL

 

LI-1100C 

LINE IMPEDANCE STABILIZATION NETWORK 

 

19121 El  T oro R d   ●  S il vera d o, Ca lifo rnia  926 76   ●   (94 9)  459 - 9600    ●  com - p ower.com

 

                

 

 

      REV022717   

6.0

 

  LISN

 

T

HEORY

 

 

Line  Impedance  Stabilization  Networks  provide  standardized  line  impedance  to  the  EUT 
during  conducted  emissions  testing  which  is  independent  of  the  external  power  line 
impedance.  The  standardized  impedance  enables  consistent  readings  for  RF  noise 
measurements  on  the  power  line.  The  model  LI-1100C  consists  of  two  separate  LISN 
networks  housed  in  separate  enclosures  for  testing  EUTs  with  single  phase  power 
requirements.  
 
In addition to providing standardized impedance, the LISN also acts as a low pass filter for 
the  power  to  equipment  under  test.  The  LISN  blocks  RF  noise  from  the  power  line  from 
reaching  the  equipment  under  test,  however,  the  power  to  the  equipment  passes 
through  the  LISN  with  minimal  attenuation.    This  filter  is  comprised  of  a  single  stage  low 
pass  LC  filter.  The  inductors  (L)  used  in  the  LI-1100C  are  air  core  type  to  eliminate  the 
possibility of saturation and to provide stability.   
 
The  LISN  also  provides  a  low  impedance  path  for  the  RF  noise  from  the  EUT  to  the 
measuring  equipment,  thereby  facilitating  the  measurement  of  the  EUT  RF  noise.    The 
insertion  loss  factors  provided  with  every  LISN  network.  It  may  be  significant  at  low 
frequencies;  especially  below  400  kHz.  Therefore,  the  insertion  loss  correction  factors 
should always be considered for the highest measurement accuracy. 
 
Example  schematic  of  the  LISN  as  well  as  the  respective  impedance  requirements  are 
specified  in  the  ANSI  C63.4  and  CISPR-16-1-2  standards.  CISPR  16-1-2  also  specifies 
additional requirements for phase performance and Mains port isolation.  A typical circuit 
diagram of an LISN is given in figure below. 

 

 

Figure 5: Example of equivalent LISN circuit 

 
 
 
 

Distributed by: Reliant EMC LLC,  +1 408 916

5750,  [email protected], www.reliantemc.com

Содержание LI-1100C

Страница 1: ...LI 1100C LINE IMPEDANCE STABILIZATION NETWORK REV022717 INSTRUCTION MANUAL For LINE IMPEDANCE STABILIZATION NETWORK Model LI 1100C 150 kHz to 30 MHz Distributed by Reliant EMC LLC 1 408 916 5750 info reliantemc com www reliantemc com ...

Страница 2: ... 11 6 0 LISN Theory 14 7 0 Typical Performance Data 15 8 0 Warranty 17 8 1 Maintenance 17 List of Figures Figure 1 Single Phase connection with one set of LISN 10 Figure 2 Three Phase connections with two sets of LISN 11 Figure 3 Rear Panel 11 Figure 4 Front Panel 11 Figure 5 Example of equivalent LISN circuit 14 Figure 6 Typical Impedance compared to ANSI C63 5 CISPR 16 1 2 requirements 15 Figure...

Страница 3: ...fety precautions operational instructions and warranty information and guidelines and instructions for its proper usage Information contained in this manual is the property of Com Power Corporation It is issued with the understanding that the material may not be reproduced or copied without the express written permission of Com Power Distributed by Reliant EMC LLC 1 408 916 5750 info reliantemc co...

Страница 4: ...Immunity Test Systems Impedance Stabilization Networks ISN Line Impedance Stabilization Networks LISN Antenna Masts Near Field Probe Sets Preamplifiers Power Amplifiers Spectrum Analyzers Product Safety Test Equipment Transient Limiters Turntables Antenna Tripods Telecom Test Systems 2 0 PRODUCTS AVAILABLE FROM COM POWER www com power com Distributed by Reliant EMC LLC 1 408 916 5750 info reliante...

Страница 5: ...e user that un insulated dangerous voltages are present within the product enclosure and on output connectors These voltages may be of sufficient magnitude to constitute a risk of electric shock to persons The Ground symbol inside a circle indicates terminal which is intended for connection to an external conductor for protection against electric shock in case of a fault or the terminal of a prote...

Страница 6: ...rtificate External transient limiter model LIT 153 3 4 General Safety Instructions The following safety instructions have been included in compliance with safety standard regulations Please read them carefully READ AND RETAIN INSTRUCTIONS Read all safety and operating instructions before operating the instrument Retain all instructions for future reference HEED WARNINGS Adhere to all warnings on t...

Страница 7: ...nts for electrical equipment for measurement control and laboratory use In addition the basic insulation required for a category I protection device cannot be assured Therefore it is imperative to provide additional measures safeguarding against direct or indirect contact by user The operator is responsible for ensuring that protection is maintained during work with the line impedance stabilizatio...

Страница 8: ... or ladder ENVIRONMENTAL CONDITIONS This equipment is designed for indoor use Ambient temperature range during operation should be between 5 C to 40 C STORAGE AND PACKAGING The device should only be stored at a temperature between 25 and 70 C During extended periods of storage protect the device from dust accumulation The original packaging should be used if the device is transported or shipped ag...

Страница 9: ...VAC 50 60 Hz Line to Ground 620 VDC Inductor type 50 µH EUT Power connector Shrouded Superior Electric Banana Connector RF measurement connector 50Ω N type female Cooling Forced Air Power Adapter for fan Output 6 VDC 0 5 Amp Input 120 VAC 60 Hz 230 VAC 50 Hz Fuse 1 Amp 250 V Adapter output connector Diameter 2 1 x 5 5 mm Center Positive Mechanical Dimensions of Each LISN L x W x H 21 x 10 x 10 inc...

Страница 10: ...nd couples the disturbance voltages to the coaxial measurement port for connection to the measuring instrument like EMI Receiver or Spectrum Analyzer 5 2 Product Setup Before initiating use of LISN ensure that PE conductor is connected to ground The ventilation openings are unobstructed No signal or operating voltages above the permissible limits given in specification The LISN s power input port ...

Страница 11: ...a Superior Electric Shrouded pin receptacle for connection to an external DC or AC input power source The LISN is shipped with two matching shrouded socket plug for connection to the input power source cables 5 3 3 5 3 2 5 3 4 Figure 4 Rear Panel Figure 3 Front Panel Figure 2 Three Phase connections with two sets of LISN 5 3 1 5 3 2 5 3 5 5 3 6 5 3 7 Distributed by Reliant EMC LLC 1 408 916 5750 i...

Страница 12: ...100C has a Superior Electric Shrouded socket receptacle to power the equipment under test The LISN is shipped with the matching shrouded pin plug for making the connections to EUT power cable 5 3 4 EMI measurement Port The LI 1100C provides a 50 Ω N Type female connector to connecting the Spectrum analyzer or EMI receiver for making conducted noise measurements The shielding connection of the N co...

Страница 13: ...n ON before powering the EUT via LISN CAUTION The LI 1100 LISNs uses forced air system to keep the air core inductors cool during the test Always use the supplied DC adapter to power the internal fan during the test Do not obstruct the airflow vents Use the LISNs in a ventilated area Failure to observe these precautions may damage the LISN Overheated LISN may also provide incorrect measurement dat...

Страница 14: ...hrough the LISN with minimal attenuation This filter is comprised of a single stage low pass LC filter The inductors L used in the LI 1100C are air core type to eliminate the possibility of saturation and to provide stability The LISN also provides a low impedance path for the RF noise from the EUT to the measuring equipment thereby facilitating the measurement of the EUT RF noise The insertion lo...

Страница 15: ...ents Figure 7 Typical Phase compared to CISPR 16 1 2 requirements 20 30 40 50 60 70 0 1 1 10 100 Impedance ohms Frequency MHz LISN Impedance CISPR 16 1 2 Ed 1 2 Tbl 4 50uH Impedance Limits 20 ANSI C63 4 2009 Tbl B 2 50uH Impedance Limits 20 20 10 0 10 20 30 40 50 60 70 0 1 1 10 100 Phase Angle degrees Frequency MHz LISN Phase CISPR 16 1 2 Ed 1 2 Tbl 4 50uH Phase Limits 11 5 Distributed by Reliant ...

Страница 16: ...solation compared to CISPR 16 1 2 requirements Figure 9 Typical Insertion Loss 20 30 40 50 60 70 80 90 100 0 1 1 10 100 Isolation dB Frequency MHz LISN Isolation CISPR 16 1 2 Edition 1 2 Isolation Limit Minimum 0 0 2 0 4 0 6 0 8 1 0 1 1 10 100 Insertion Loss dB Frequency MHz LISN Insertion Loss Distributed by Reliant EMC LLC 1 408 916 5750 info reliantemc com www reliantemc com ...

Страница 17: ...ectly or indirectly from the use or handling of this product or any inability to use this product separately or in combination with any other equipment When requesting warranty services it is recommended that the original packaging material be used for shipping Damage due to improper packaging will void warranty In the case of repair or complaint Please visit our website www com power com and fill...

Отзывы: