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INSTRUCTION MANUAL

 

LI-400C 

LINE IMPEDANCE STABILIZATION NETWORK 

 

1912 1 El  T oro  Rd   ●   S il vera d o, C al ifornia  926 76  ●  ( 94 9)  459- 9600    ●   com -p ow er.com

 

                

 

 

      REV0221   

5.0

 

P

RODUCT 

D

ESCRIPTION

 

5.1 Overview 

The  LI-400C  Line  Impedance  Stabilization  Network  is  specifically  designed  to 
provide  necessary  measurement  platform  for  performing  power  line  conducted 
emissions (disturbance measurements) compliance testing in accordance with Mil 
Std 461.

 

  

 

 The LI-400C performs each of the following functions during the measurement: 

•  provides  a  defined,  stable  impedance  throughout  the  measurement 

frequency range; 

• isolates the EUT and measurement circuit from the power source, thereby 

minimizing its influence on the measurements; and, 

•  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 is connected to an appropriate power source 

employing properly rated mains protection, as over current protection is 
not provided in the LISN. 

 

Failure to comply with any of these points may damage the equipment and/or 
pose an electrical hazard. 

5.2.1  Typical connection diagrams 

The  LISNs  can  be  used  with  single  phase  power  sources  with  one  set  of 
LISNs and also three phase power sources (requires two sets of LISNs). Given 
below are the typical connection setup’s for each configuration. 

 

 
 
 
 

Figure 1: Single Phase connection with one set of LISN

 

Distributed by: Reliant EMC LLC,  +1 408 916

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

Summary of Contents for LI-400C

Page 1: ...L LI 400C LINE IMPEDANCE STABILIZATION NETWORK REV0221 INSTRUCTION MANUAL For LINE IMPEDANCE STABILIZATION NETWORK Model LI 400C 10 kHz to 10 MHz Distributed by Reliant EMC LLC 1 408 916 5750 info rel...

Page 2: ...ion 10 5 1 Overview 10 5 2 Product Setup 10 5 3 Front Rear Panel Marking 11 6 0 LISN Theory 13 7 0 Typical Performance Data 14 8 0 Warranty 15 8 1 Maintenance 15 List of Figures Figure 1 Single Phase...

Page 3: ...y 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...

Page 4: ...munity Test Systems Impedance Stabilization Networks ISN Line Impedance Stabilization Networks LISN Antenna Masts Near Field Probe Sets Preamplifiers Power Amplifiers Spectrum Analyzers Product Safety...

Page 5: ...ser 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 perso...

Page 6: ...ficate External transient limiter model LIT 930 3 4 General Safety Instructions The following safety instructions have been included in compliance with safety standard regulations Please read them car...

Page 7: ...rol 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 dir...

Page 8: ...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 stor...

Page 9: ...nes Two lines Max current rating 25 Amp Max Voltage rating 270 VAC 50 400 Hz Line to Ground 380 VDC Inductor type 50 H EUT Power connector Shrouded Superior Electric Banana Connector RF measurement co...

Page 10: ...nt 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 ventilatio...

Page 11: ...nnected to any power source protected by either a ground fault circuit interrupter GFCI circuit breaker or residual current devices RCDs The power source must be protected by a circuit breaker with a...

Page 12: ...s a 50 N Type female connector to connecting the Spectrum analyzer or EMI receiver for making conducted noise measurements The shielding connection of the N connector shield is connected to the housin...

Page 13: ...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 400C are ai...

Page 14: ...wer com REV0221 7 0 TYPICAL PERFORMANCE DATA Figure 6 Typical Impedance compared to Mil Std requirements Figure 7 Typical Insertion Loss 0 10 20 30 40 50 60 70 0 01 0 1 1 10 Impedance Frequency MHz 0...

Page 15: ...ing 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...

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