Com-Power LI-400 User Manual
Line Impedance Stabilization Network
LINE
NEUTRAL
LINE
NEUTRAL
EQUIPMENT
UNDER
TEST
POWER
SOURCE
EARTH GROUND
LISN
LISN
GROUND
GROUND
GROUND
GROUND
LINE 3
NEUTRAL
LINE 3
NEUTRAL
EQUIPMENT
UNDER
TEST
POWER
SOURCE
EARTH GROUND
LISN
LISN
GROUND
GROUND
GROUND
GROUND
LINE 1
LINE 2
LINE 1
LINE 2
LISN
LISN
GROUND
GROUND
GROUND
GROUND
Features
Frequency range of 10 kHz to 10 MHz
Fully compliant with MIL-STD 461
“Air-core” inductors to prevent saturation
Individual Calibration Included
Three-Year Warranty
Description
The LI-400 Line Impedance Stabilization Network
(LISN) provides the necessary measurement
platform for performing power line conducted
emissions compliance testing as required by most
worldwide standards for commercial products.
The LI-400 is compliant with MIL-STD 461.
The LISN provides dened stable impedance and
isolates the EUT from power source inuences,
thereby providing accurate and repeatable results.
The LI-400 includes one pair of, separately housed,
single-conductor networks, to be installed in series
with each current-carrying conductor in a single-
phase, dual-phase or DC power system. A second
LI-400 pair can be used to accommodate 3-phase
power systems (Wye or Delta congurations).
LI-400
Use of a Transient Limiter for impedance matching,
reduction of out-of-band emissions and transient
protection for your measurement instrument is
highly recommended and available from Com-
Power.
All Com-Power LISNs are individually calibrated
in compliance with the relevant requirements of
MIL-STD 461. Impedance and Insertion Loss data is
supplied with each unit, along with the calibration
certicate.
Typical Connection Diagrams
Single Phase connection with one set of LISN
The LI-400 is equipped with Superior Electric
SUPERCON® shrouded sockets at the mains
(power input) and EUT (power output) ports. The
matching color-coded plugs for connection to the
Three Phase connection with two sets of LISNs
mains and EUT wiring are included.
This LISN uses air-core inductors to prevent
saturation and permeability variation. The
mounting plate of the LI-400 is left unpainted in
order to facilitate connection to earth ground in its
installation, which is essential due to high leakage
current.
Com-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459 - 9600 www.com-power.com
Rev. D04.14
Line Impedance Stabilization Network
LI-400
Application
Product Name Line Impedance Stabilization Network (LISN)
Specication MIL-STD 461
Application
Frequency Range
RF Connector
Current Rating
Voltage Rating
Inductors
Mains & EUT Connections
Dimensions (each network)
Power line conducted emissions tests
10 kHz to 10 MHz
50Ω N-type (female)
25 Amperes
270 VAC (Line to Ground), 380 VDC
50 µH (air-core)
Superior Electric SUPERCON® shrouded sockets
13 x 7 x 7 inches / 33 x 17.7 x 17.7 cm
Weight (each network) 14 lbs. / 6.3 kg
All specications are subject to change without notice.
All values are typical, unless specied.
70
60
50
40
, 17 Amperes
(AC)
(DC)
LISN Model No. LI-400
30
Impedance (ohm)
20
10
0
0.01 0.1 1 10
6
5
4
3
2
Insertion Loss (dB)
1
0
0.01 0.1 1 10
Com-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459 - 9600 www.com-power.com
Frequency (MHz)
Frequency (MHz)
MIL-STD 461F, Fig.7
(50uH) Impedance Limits
(±20%)
LISN Model No. LI-400
Rev. D04.14
Loading...