Instruction Manual

Line Impedance Stabilization Network
LI-150A
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
The LI-150A 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-150A is compliant with both CISPR 16-1-2 and
ANSI C63.4.
The LISN provides dened stable impedance and
isolates the EUT from power source inuences,
thereby providing accurate and repeatable results.
The LI-150A 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-150A pair can be used to accommodate 3-phase
power systems (Wye or Delta congurations).
The LI-150A 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
mains and EUT wiring are included.
This LISN uses air-core inductors to prevent
saturation and permeability variation. The
mounting plate of the LI-150A is left unpainted in
order to facilitate connection to earth ground in its
installation, which is essential due to high leakage
current.
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
CISPR 16-1-2 and ANSI C63.4. Impedance, Phase,
Isolation, and Insertion Loss data is supplied with
each unit, along with the calibration certicate.
Com-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459 - 9600 www.com-power.com
Typical Connection Diagrams
Single Phase connection with one set of LISN
Three Phase connection with two sets of LISNs
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
Description
Rev. D04.14