Com-Power LI-550A - Manual

Line Impedance Stabilization Network
LI-550A
Features
Frequency range of 100 kHz to 108 MHz
Fully compliant with CISPR 25 / CISPR 16-1-2
“Air-core” inductors to prevent saturation
Individual Calibration Included
Three-Year Warranty
The LI-550A 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-550A is compliant with both CISPR 25 and
CISPR 16-1-2 .
The LISN provides defined stable impedance and
isolates the EUT from power source influences,
thereby providing accurate and repeatable results.
The LI-550A 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-550A pair can be used to accommodate 3-phase
power systems (Wye or Delta configurations).
The LI-550A 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-550A 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 25 and CISPR 16-1-2. Impedance, Phase,
Isolation, and Insertion Loss data is supplied with
each unit, along with the calibration certificate.
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
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
Description
Rev. D04.14