Com-Power LI-1100 100A Line Impedance Stabilization Network (LISN)

Key Features At A Glance

• Frequency range of 150 kHz to 30 MHz for power line conducted emissions testing
• 100 A AC current rating (70 A DC) with forced air cooling for high-current EUT testing
• Fully compliant with CISPR 16-1-2 and ANSI C63.4 measurement standards
• Air-core 50 µH inductors prevent saturation and permeability variation under high current
• Insertion loss < 0.5 dB and isolation > 40 dB across the 150 kHz to 30 MHz range
• Superior Electric SUPERCON shrouded sockets at mains and EUT ports with matching color-coded plugs included
• Individual calibration data supplied with each unit: impedance, phase, isolation, and insertion loss
• Voltage rating of 440 VAC (line to ground) and 620 VDC supports single-phase, dual-phase, and DC power systems

The Com-Power LI-1100 is a Line Impedance Stabilization Network designed to provide the measurement platform required for power line conducted emissions compliance testing. It is built to the requirements of CISPR 16-1-2 and ANSI C63.4, the two measurement standards most commonly referenced by worldwide commercial product compliance regimes. Each LI-1100 unit ships as a pair of separately housed single-conductor networks, allowing installation in series with each current-carrying conductor in a single-phase, dual-phase, or DC power system. A second LI-1100 pair extends coverage to three-phase Wye or Delta configurations.

A line impedance stabilization network performs two functions in a conducted emissions test setup: it presents a defined and stable RF impedance to the equipment under test across the measurement band, and it isolates the EUT from RF disturbances originating on the mains supply. Without this defined impedance and isolation, conducted emissions measurements vary with the mains environment and cannot be repeated reliably across test facilities or compared to the limits published in regulatory standards. The LI-1100 establishes the controlled conditions under which conducted emissions data becomes meaningful for compliance documentation.

ValueTronics International stocks and supports the Com-Power LI-1100 from our 20,000 square foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Compliance test equipment requires accurate documentation and reliable performance — every unit shipped from our facility carries the manufacturer's individual calibration data, and our staff supports the configuration and accessory questions that EMC test setups commonly involve.

Accessories Supplied

• One pair of separately housed, single-conductor networks
• Color-coded SUPERCON® plugs for mains and EUT wiring
• Individual calibration certificate (Impedance, Phase, Isolation, and Insertion Loss data)

Product Core & Specifications

Specification	Value
Product Name	Line Impedance Stabilization Network (LISN)
Specification	CISPR 16-1-2 / ANSI C63.4
Application	Power line conducted emissions tests
Frequency Range	150 kHz to 30 MHz
RF Connector	50Ω N-type (female)
Current Rating	100 Amperes (AC), 70 Amperes (DC)
Voltage Rating	440 VAC (Line to Ground), 620 VDC
Inductors	50 µH (air-core)
Mains & EUT Connections	Superior Electric SUPERCON® shrouded sockets
Dimensions (each network)	10 x 10 x 21 inches / 25.4 x 25.4 x 53.3 cm
Weight (each network)	17 lbs. / 7.7 kg
Insertion Loss	< 0.5 dB (150 kHz to 30 MHz)
Isolation	> 40 dB (150 kHz to 30 MHz)
Cooling	Forced air cooling
Warranty	Three-Year

Important: Use of a transient limiter between the LISN's RF port and the measurement instrument is highly recommended for impedance matching, reduction of out-of-band emissions, and transient protection.Important: The mounting plate of the LI-1100 is left unpainted in order to facilitate connection to earth ground in its installation, which is essential due to high leakage current.Important: 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 separately from Com-Power.Important: A second LI-1100 pair can be used to accommodate 3-phase power systems (Wye or Delta configurations); a single LI-1100 set covers single-phase, dual-phase, or DC power systems.Recommended pairing: a compatible transient limiter at the RF port, available from Com-Power, for impedance matching and measurement instrument protection per the manufacturer's installation guidance.

Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.