Com-Power LI-125A User Manual
Line Impedance Stabilization Network
LINE
NEUTRAL
LINE
NEUTRAL
EQUIPMEN
T
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 150 kHz to 30 MHz
Fully compliant with CISPR 16-1-2 / ANSI C63.4
“Air-core” inductors to prevent saturation
Individual Calibration Included
Three-Year Warranty
Description
The LI-125A 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-125A is compliant with both CISPR 16-1-2 and
ANSI C63.4.
The LISN provides dened stable impedance and
isolates the EUT from power source inuences,
thereby providing accurate and repeatable results.
LI-125A
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 ComPower.
All Com-Power LISNs are individually calibrated
in compliance with the relevant requirements of
CISPR 16-1-2 and ANSI C63.4. Impedance, Phase,
Isolation, and Insertion Loss data is supplied with
each unit, along with the calibration certicate.
Typical Connection Diagrams
The LI-125A includes one pair of, separately housed,
Single Phase connection with one set of LISN
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-125A pair can be used to accommodate 3-phase
power systems (Wye or Delta congurations).
The LI-125A is equipped with Superior Electric
SUPERCON® shrouded sockets at the mains
(power input) and EUT (power output) ports. The
Three Phase connection with two sets of LISNs
matching color-coded plugs for connection to the
mains and EUT wiring are included.
This LISN uses air-core inductors to prevent
saturation and permeability variation. The
mounting plate of the LI-125A 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-125A
Application
Product Name Line Impedance Stabilization Network (LISN)
Specication CISPR 16-1-2 / ANSI C63.4
Application
Frequency Range
RF Connector
Current Rating
Voltage Rating
Inductors
Mains & EUT Connections
Dimensions (each network)
Power line conducted emissions tests
150 kHz to 30 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) 25 lbs. / 11.3 kg
Insertion Loss
Isolation
All specications are subject to change without notice.
All values are typical, unless specied.
70
60
50
40
Impedance (ohm)
30
20
0.1 1 10 100
< 0.5 dB (150 kHz to 30 MHz)
> 40 dB (150 kHz to 30 MHz)
Frequency (MHz)
, 17 Amperes
(AC)
(DC)
LISN Model No. LI-125A
CISPR 16-1-2, Ed.1.2, Tbl 4
(50uH) Impedance Limits
(±20%)
ANSI C63.4-2009, Tbl B.2
(50uH) Impedance Limits
(±20%)
ANSI C63.4-2003, Fig.1
(50uH) Impedance Limits
(±20%)
70
60
50
40
30
20
10
Phase Angle (degree)
0
-10
-20
0.1 1 10 100
Com-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459 - 9600 www.com-power.com
Frequency (MHz)
S/N: 191162, Mains Port:
Open
CISPR 16-1-2, Ed.1.2, Tbl 4
(50uH) Phase Limits
(±11.5°)
Rev. D04.14
Loading...