100 Amps Three-Phase LISN for MIL-STD-461 CE102 Testing

General

• Product Type: Three-Phase LISN
• Application: CE102 Conducted Emissions Testing
• Standards: MIL-STD-461D/E/F/G
• Network Type: 50 Ω / 50 µH Four-Conductor
• Frequency Range: 10 kHz–10 MHz

Insertion Loss

• 10 kHz–150 kHz: <26 to <21 dB
• 150 kHz–10 MHz: <21 dB

Input Power Ratings (EUT)

• Maximum Current: 100 A per phase (continuous)
• AC Voltage: 865 V rms (L-L), 500 V rms (L-G); 50/60 Hz
• AC Voltage: 270 V rms (L-G) at 400 Hz; 135 V rms (L-G) at 800 Hz
• DC Voltage: 600 V DC

Connections

• 100A heavy-duty receptacle pins / plug sockets / receptacle sockets / plug pins
• RF Port: 50 Ω N-Type (female)
• Fiber Optic Ports: Avago Duplex Latching POF
• Remote Power Input: 6 VDC, 500 mA
• Fan Power Input: 15 VDC, 500 mA

Environmental / Cooling

• Cooling: Louvered panels with dual forced-air internal fans

Product Weight

• Weight: 70.9 lbs (32.15 kg)

LI-3P-4100 V2.0 MIL-STD-461 Three-Phase LISN FAQs

What is the LI-3P-4100 and what class of military equipment does it support?

The LI-3P-4100 V2.0 is a four-conductor, 50Ω, 50 μH three-phase Line Impedance Stabilization Network (LISN) designed for CE102 power-line conducted emissions compliance testing per MIL-STD-461D, E, F, and G at 100 amperes per phase. It is the highest-current model in the LI-3P-4x series, intended for the largest class of three-phase military and defense equipment — including shipboard propulsion power conditioning systems, large military ground vehicle electrical drives, high-power defense radar and EW prime power assemblies, carrier deck support equipment, and large-scale military energy storage systems.

What versions of MIL-STD-461 does the LI-3P-4100 comply with and why is multi-revision compliance important?

The LI-3P-4100 is fully compliant with MIL-STD-461D, E, F, and G. Multi-revision compliance matters because defense acquisition programs span decades and equipment may need to satisfy CE102 under the revision in effect at the time of its original program contract. A laboratory holding a single LI-3P-4100 can conduct CE102 testing for 100 A class equipment under any of the four active revisions without additional instrumentation.

What frequency range does the LI-3P-4100 cover and what CE102 measurement significance does this range have?

The LI-3P-4100 covers 10 kHz to 10 MHz — the complete CE102 range defined by MIL-STD-461. For 100 A class equipment such as large power converters and propulsion drives switching at 2 kHz to 20 kHz, the 10 kHz to 150 kHz sub-band is where dominant harmonic and switching noise components fall. Testing must begin at 10 kHz to capture this energy and ensure CE102 compliance across the full required range.

What military power supply frequencies and voltage ratings does the LI-3P-4100 accommodate?

The LI-3P-4100 accommodates 50/60 Hz at up to 865 V RMS line-to-line / 500 V RMS line-to-ground; 400 Hz aircraft and shipboard power at up to 270 V RMS line-to-ground; and 800 Hz high-frequency military power at up to 135 V RMS line-to-ground; plus 600 V DC. At 100 A on a 115/200 V 400 Hz aircraft-type supply, this supports equipment up to approximately 35 kVA.

What are the maximum EUT ratings and what power conversion equipment class does this address?

The LI-3P-4100 supports 100 A per phase continuous. This covers shipboard integrated power system converters, high-power radar transmitter prime power systems, large military electric vehicle drive systems, aircraft carrier deck electrical support equipment, military electrolyzer and energy storage power converters, submarine propulsion drive power conditioning units, and large military command post infrastructure power systems.

How does the 50 μH standard LISN network in the LI-3P-4100 differ from the V-AMN network used in commercial 100 A LISNs?

The LI-3P-4100 uses a 50Ω, 50 μH four-conductor network specified by MIL-STD-461 for CE102 testing. The commercial LI-3P-2100 uses a V-AMN 50/250 μH +5Ω network specified by CISPR 16-1-2 for V-network testing from 9 kHz to 30 MHz. The two networks have different impedance profiles, frequency ranges, and calibration requirements. Neither can substitute for the other — using the wrong LISN type produces measurements non-compliant with the respective standard.

Why is forced-air cooling essential on the LI-3P-4100 at 100 A and how does the cooling system operate?

At 100 A per phase, resistive losses generate substantial heat that passive convection cannot manage during extended CE102 sequences. The LI-3P-4100 includes two user-controlled internal fans powered by a dedicated 15 VDC rear-panel supply, independent of the 6 VDC remote interface supply. Cooling fans must be activated before energizing the EUT and must remain running throughout CE102 testing to protect inductor insulation and maintain accurate inductance values.

How does the RLI V2.0 remote line switching system enhance both safety and measurement quality at 100 A?

At 100 A, power cables carry enormous current and are energized at high voltages. Physical access to switch measurement lines would require de-energizing the system, disrupting EUT thermal and operational steady state. The RLI V2.0 switches L1, L2, L3, and Neutral via a 10-meter fiber optic cable from outside the shielded room, maintaining continuous EUT operation and consistent conditions throughout the four-line CE102 sequence. Galvanic isolation of the fiber link prevents the switching mechanism from introducing any conducted noise into the measurement path.

What insertion loss does the LI-3P-4100 provide and how is this applied in CE102 data post-processing?

Insertion loss decreases from less than 26 dB at 10 kHz to less than 21 dB at 150 kHz, remaining below 21 dB through 10 MHz. In CE102 post-processing, the insertion loss correction from the individual calibration data sheet must be added to raw receiver readings at each frequency point to obtain the actual disturbance voltage at the LISN RF port, which is then compared against the applicable MIL-STD-461 CE102 limit line.

What does a complete CE102 test setup look like for 100 A class three-phase military equipment?

The LI-3P-4100 is bonded to the MIL-STD-461 bonding plane via the unpainted mounting plate. The military power supply connects to the mains input using 100A rated color-coded connectors. A 50Ω N-Type coaxial cable runs to the EMI receiver configured for a 10 kHz to 10 MHz CE102 sweep. The RLI V2.0 fiber optic cable exits through a filtered waveguide penetration. Cooling fans are started first, the EUT is brought to rated load, then sequential peak or quasi-peak sweeps are performed on L1, L2, L3, and Neutral from the external operator station with insertion loss corrections applied.

In which specific defense program and military platform contexts is the LI-3P-4100 most applicable?

The LI-3P-4100 is most applicable for qualifying shipboard integrated power system converters and propulsion motor drives for surface combatants and submarines, aircraft carrier deck power distribution and support equipment, large military ground vehicle hybrid electric drives, high-power radar and directed energy weapon prime power units, military fuel cell and battery energy storage system power electronics, and strategic military facility backup power systems under MIL-STD-461.

What grounding, bonding, and personnel safety requirements are critical for the LI-3P-4100 at 100 A?

The unpainted mounting plate must be bonded to the MIL-STD-461 reference bonding plane with a direct, verified metal-to-metal connection before any power source is connected. At 100 A per phase, leakage currents are potentially life-threatening if the earth bond is absent or high-impedance. In facilities with non-metallic floors, painted bonding surfaces, or unverified earth infrastructure, a dedicated low-impedance bonding conductor must be installed from the LISN mounting plate to a verified earth bus before testing begins.

What are the physical dimensions and weight of the LI-3P-4100 and what site preparation is required?

The LI-3P-4100 measures 17.36″ H × 17.79″ W × 20.78″ D and weighs 70.9 lbs (32.15 kg), with a shipping weight of 136.9 lbs. Facility planners must account for adequate bonding plane area, a suitable lifting mechanism or two-person lift procedure, confirmation the shielded enclosure accommodates the 20.78-inch depth, and availability of a three-phase supply capable of 100 A at the appropriate military power frequency.

Why are air-core inductors non-negotiable at 100 A in a MIL-STD-461 CE102 LISN?

At 100 A, any ferromagnetic core material would saturate, causing inductance to collapse from 50 μH to a fraction of that value, fundamentally destroying the 50Ω LISN impedance characteristic required by MIL-STD-461. Air-core inductors have no saturation threshold — inductance remains constant at 50 μH regardless of current, frequency, or temperature — guaranteeing that CE102 disturbance voltages are measured against the correct defined impedance reference at every current level from standby to full 100 A load.

How is the LI-3P-4100 calibrated and what are the documentation and accreditation options?

Every LI-3P-4100 is individually calibrated per MIL-STD-461. Impedance and insertion loss data across the full 10 kHz to 10 MHz range are supplied with each unit along with a certificate of calibration. ISO 17025 accredited calibration is available upon request, typically required by government-owned test laboratories, depot-level military test facilities, and defense prime contractors under quality management systems mandating traceable calibration.

How does the LI-3P-4100 complete the LI-3P-4x series and how should a laboratory choose between the four MIL-STD-461 models?

The LI-3P-4x series provides four CE102 current tiers: LI-3P-416 at 16 A, LI-3P-432 at 32 A, LI-3P-463 at 63 A, and LI-3P-4100 at 100 A per phase. All four share identical 50Ω 50 μH topology, 10 kHz to 10 MHz range, MIL-STD-461D/E/F/G compliance, forced-air cooling, multi-frequency military power support, and RLI V2.0 remote switching. Selection is based solely on maximum EUT current per phase. Select the lowest-rated model that comfortably accommodates the EUT's rated current including startup inrush margins to minimize size and cost while maintaining full CE102 capability.

How does the LI-3P-4100 compare to the LI-3P-2100 commercial series model, and can one replace the other?

The LI-3P-2100 uses a V-AMN 50/250 μH +5Ω network calibrated to CISPR 16-1-2 and ANSI C63.4, operating from 9 kHz to 30 MHz with a bypassable transient limiter. The LI-3P-4100 uses a standard 50 μH network calibrated to MIL-STD-461, operating from 10 kHz to 10 MHz. Neither can replace the other: CE102 testing under MIL-STD-461 requires the LI-3P-4100; commercial V-network testing under CISPR 16-1-2 requires the LI-3P-2100. Defense contractors whose products require both military and commercial certification will need both instruments for their respective test programs.

How is the LI-3P-4100 used when conducting CE102 qualification testing on a shipboard integrated power system converter?

Shipboard integrated power system (IPS) converters used in electric-drive surface combatants and submarine auxiliary propulsion can draw up to 100 A per phase from the ship's three-phase bus at 60 Hz or 400 Hz. The LI-3P-4100 is energized from a regulated high-current three-phase supply replicating the ship bus, and the IPS converter EUT operates at rated output power into a representative load. CE102 sweeps from 10 kHz to 10 MHz on all four conductors capture the complex spectral content generated by high-frequency switching stages processing very large amounts of power. The LI-3P-4100's air-core inductors maintain the 50 μH impedance at 100 A, ensuring measurements correctly represent the disturbance voltage that would appear on the ship's power distribution at each test frequency.

What does a CE102 testing program for a military vehicle hybrid electric drive system look like using the LI-3P-4100?

Military ground vehicle hybrid electric drive (HED) systems include large three-phase motor-generator sets and traction inverters that may draw up to 100 A per phase from the vehicle's onboard generator. The LI-3P-4100 is inserted between a simulated vehicle generator supply and the HED system's three-phase input. The system is operated through electric-only operation, engine-generator charging, and regenerative braking simulation using a chassis dynamometer. CE102 sweeps in each mode identify which mode produces worst-case conducted emissions on each conductor. The 100 A continuous rating accommodates peak phase currents during maximum acceleration and regeneration without any LISN derating during the test.

How is the LI-3P-4100 applied in directed energy weapon system CE102 testing at a DoD test range?

Directed energy weapon (DEW) systems — including high-energy laser and high-power microwave weapon systems — require massive three-phase prime power systems drawing up to 100 A per phase during energy storage charging cycles. CE102 testing with the LI-3P-4100 is performed at a DoD test range or weapon system integration facility with appropriate safety controls. The LISN connects between the facility three-phase bus and the DEW prime power input. CE102 sweeps during battery or capacitor charging phases — the highest conducted emissions operating mode — verify that the DEW system does not contaminate the base or ship power distribution with emissions that could interfere with other weapon systems, sensors, or communications sharing the power infrastructure.

How does the LI-3P-4100 support CE102 testing of large military energy storage systems such as shipboard battery banks and ultracapacitor arrays?

Military energy storage systems — including shipboard battery energy storage systems (BESS) and submarine battery systems — require large three-phase bidirectional power conversion systems for charging that can draw up to 100 A per phase. CE102 testing with the LI-3P-4100 characterizes conducted emissions during bulk charge, absorption charge, and discharge modes to find the worst-case condition for comparison against CE102 limits. The LI-3P-4100's 100 A continuous rating, stable impedance at full current, and built-in transient limiter make it the only LISN in the LI-3P-4x series capable of supporting this category of high-power energy storage CE102 testing.

What is the role of the LI-3P-4100 in a military System Integration Laboratory (SIL) environment where multiple high-power systems are being qualified simultaneously?

In a military System Integration Laboratory (SIL) — where multiple major subsystems of a platform are operated together before the actual platform is built — the LI-3P-4100 is typically assigned to the highest-current three-phase subsystem in the integration set, such as the electric drive or integrated power management system. CE102 measurements taken with the high-power subsystem operating in its full integration context, surrounded by other subsystems, are more representative of the real platform electromagnetic environment than isolated subsystem testing. System-level CE102 testing in a SIL is increasingly required by DoD program offices for major platform acquisition programs.

How is the LI-3P-4100 used at a naval shipyard conducting MIL-STD-461 CE102 testing on a shipboard integrated power management system?

A shipboard integrated power management system (IPMS) drawing up to 100 A per phase while managing power flow between generators, energy storage, and electrical loads is tested in multiple management modes including normal load following, peak power demand, and energy storage charging to identify worst-case conducted emissions. CE102 sweeps from 10 kHz to 10 MHz on all four conductors are performed in each mode, and the worst-case sweep from all modes forms the basis of the CE102 test report submitted to the Navy program office.

What is a real-world scenario where the LI-3P-4100 is used to perform CE102 qualification of a large three-phase power conditioning unit for a space launch ground support system?

Space launch ground support power conditioning units drawing up to 100 A per phase must meet MIL-STD-461 CE102 requirements to prevent conducted emissions from coupling into the launch vehicle’s sensitive electronic systems during pre-launch checkout. The LI-3P-4100 is used at a DoD-recognized test facility at rated load, with CE102 sweeps from 10 kHz to 10 MHz confirming compliance. The CE102 test report is incorporated into the launch vehicle ground support equipment qualification package submitted to the launch authority.

How is the LI-3P-4100 applied at a military test range when performing CE102 measurements on a large three-phase power supply for a ground-based radar system?

Large ground-based military radar power systems drawing up to 100 A per phase are tested during multiple radar operating modes including standby, receive-only, and full transmit power, since the conducted emissions profile varies significantly between modes. The LI-3P-4100’s forced-air cooling and 100 A continuous rating allow the LISN to operate continuously throughout the complete multi-mode CE102 test sequence, which may last a full working day for comprehensive radar system qualification.