Com-power LI-550A User Manual download pdf

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 dened stable impedance and

isolates the EUT from power source inuences,

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 congurations).

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 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

EQUIPMENT

UNDER

TEST

POWER

SOURCE

EARTH GROUND

LISN

GROUND

LINE 3

NEUTRAL

LINE 3

NEUTRAL

EQUIPMENT

UNDER

TEST

POWER

SOURCE

EARTH GROUND

LISN

GROUND

LINE 1

LINE 2

LINE 1

LINE 2

LISN

GROUND

Description

Rev. D04.14

1 2

Summary of Contents

Page 1 - Description

Line Impedance Stabilization NetworkLI-550AFeaturesFrequency range of 100 kHz to 108 MHzFully compliant with CISPR 25 / CISPR 16-1-2“Air-core” inducto

Page 2 - Application

Line Impedance Stabilization NetworkLI-550ACom-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459 - 9600 www.com-powe

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Com-power LI-550A User Manual

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Summary of Contents

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