63 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: 63 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 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: 59.19 lbs (26.85 kg)

LI-3P-463 V2.0 MIL-STD-461 Three-Phase LISN FAQs

What is the LI-3P-463 and what high-power CE102 testing requirement does it address?

The LI-3P-463 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 63 amperes per phase. It addresses high-power three-phase military equipment — including large shipboard power conditioning systems, aircraft ground support equipment, military radar prime power assemblies, and high-power drive systems — that exceed the 32 A capability of the LI-3P-432.

What versions of MIL-STD-461 does the LI-3P-463 comply with?

The LI-3P-463 is fully compliant with MIL-STD-461D, E, F, and G, ensuring acceptance by DoD test laboratories for CE102 testing under any of the four major active revisions — covering legacy programs under older revisions as well as current acquisition programs under MIL-STD-461G.

What frequency range does the LI-3P-463 cover and why is 10 kHz the lower limit for CE102?

The LI-3P-463 covers 10 kHz to 10 MHz — the CE102 range specified in MIL-STD-461. The 10 kHz lower limit captures conducted interference from military power conversion equipment operating at low switching frequencies including PWM motor drives and switching regulators at their fundamental frequencies and low-order harmonics. The 10 MHz upper limit defines the boundary of the conducted emissions path relevant to military system EMC.

What military power supply frequencies and voltage ratings does the LI-3P-463 support?

The LI-3P-463 supports 50/60 Hz at up to 865 V RMS line-to-line / 500 V RMS line-to-ground; 400 Hz naval and aircraft 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. At 63 A on a 400 Hz 115/200 V aircraft-type supply, this covers equipment up to approximately 21 kVA — a significant segment of high-power aircraft and shipboard equipment categories.

What EUT power class does the LI-3P-463 address for CE102 testing?

The LI-3P-463 supports 63 A per phase continuous and 600 V DC maximum. This covers large three-phase motor drives for shipboard machinery, high-power radar and EW system prime power units, military aircraft ground support equipment, large three-phase UPS systems for defense installations, and military energy storage power conditioning units.

How does the forced-air cooling system on the LI-3P-463 function and why is it essential at 63 A?

The LI-3P-463 includes two user-controlled internal fans powered by a dedicated 15 VDC rear-panel supply. At 63 A, resistive and frequency-dependent losses in the inductors and conductors generate heat that passive louvered panels alone cannot manage during extended CE102 sequences. Fans must be activated before the EUT is energized and must remain running throughout all measurement sweeps to maintain thermal stability and protect inductor insulation.

How does the LI-3P-463 remote switching system improve safety when working with 63 A class equipment?

The RLI V2.0 Remote LISN Interface switches between L1, L2, L3, and Neutral via a 10-meter fiber optic cable from outside the shielded room. At 63 A, power cables pose a significant contact hazard when energized. Remote switching ensures no personnel access to the test room or energized connections is required between line sweeps. Galvanic isolation of the fiber link prevents the control station from contributing any conducted interference into the CE102 measurement path.

What insertion loss does the LI-3P-463 provide across the CE102 measurement range?

Insertion loss decreases from less than 26 dB at 10 kHz to less than 21 dB at 150 kHz, remaining below 21 dB from 150 kHz to 10 MHz. This insertion loss correction must be added to the raw receiver indication at each frequency to obtain the actual disturbance voltage for comparison against the MIL-STD-461 CE102 limit.

What does a real-world CE102 test setup look like for high-power three-phase equipment using the LI-3P-463?

The LI-3P-463 is positioned on the MIL-STD-461 bonding plane with the unpainted mounting plate in direct metal-to-metal contact. 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. The RLI V2.0 fiber optic cable exits through a filtered waveguide penetration. Cooling fans are started first, then the EUT is energized to rated load. The operator then performs sequential 10 kHz to 10 MHz CE102 sweeps on L1, L2, L3, and Neutral, applies the insertion loss correction, and compares against the CE102 limit curve.

In which specific military program areas and platform types is the LI-3P-463 most applicable?

The LI-3P-463 is most applicable for CE102 testing of large naval platform power management systems, military aircraft ground support equipment, shipboard weapon system power conditioning units, military radar and electronic warfare prime power assemblies, submarine machinery motor drive systems, military field hospital and FOB power distribution equipment, and high-power armored vehicle electrical drive systems in the 33 A to 63 A per phase range.

Why does the LI-3P-463 use 100A rated connectors for a 63 A LISN?

100A connectors provide a substantial safety margin above 63 A, accommodating startup inrush currents, harmonic content, and thermal derating in hot environments. In a military test environment, equipment may undergo fault simulations or load step tests during qualification, and the over-rated connectors ensure no failure occurs under these stress conditions. The additional capacity also reduces contact resistance and heat at connection points during extended testing.

How does the transient limiter on the LI-3P-463 protect against high-energy transients from 63 A class military equipment?

The built-in Transient Limiter incorporates low-pass and high-pass filter sections providing continuous protection across the 10 kHz to 10 MHz CE102 band. High-power military three-phase equipment can produce very high-energy switching transients during startup, load transitions, and fault recovery. Without the limiter, these events could permanently damage the EMI receiver front end. The limiter also attenuates out-of-band signals that could cause overload-induced measurement errors.

What grounding requirements are critical for the LI-3P-463 at 63 A in a MIL-STD-461 test configuration?

The unpainted mounting plate must achieve direct metal-to-metal contact with the MIL-STD-461 bonding plane before any power connections are made. At 63 A, leakage currents through the chassis represent a significant shock hazard if the bond is absent or high-impedance. Where the bonding plane surface is corroded or painted over, a dedicated bonding strap to a clean earth point must be installed before testing.

How is the LI-3P-463 individually calibrated and what documentation is provided?

Every LI-3P-463 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, commonly required by defense prime contractors and government test laboratories under quality management systems mandating traceable calibration documentation.

What are the dimensions and weight of the LI-3P-463 and what does this mean for test facility planning?

The LI-3P-463 measures 17.36″ H × 17.79″ W × 17.48″ D and weighs 59.19 lbs (26.85 kg), with a shipping weight of 125.66 lbs. Military test facility planners should confirm adequate bonding plane area, appropriate lifting provisions, and that the facility supply can deliver 63 A at the required military power frequency to the test area.

How does the LI-3P-463 relate to the LI-3P-263 commercial series model and when should each be specified?

The LI-3P-263 uses a V-AMN 50/250 μH +5Ω network from 9 kHz to 30 MHz under CISPR 16-1-2 and ANSI C63.4. The LI-3P-463 uses a standard 50 μH network from 10 kHz to 10 MHz calibrated to MIL-STD-461 for CE102. The selection rule is the governing standard: MIL-STD-461 CE102 programs require the LI-3P-463; CISPR 16-1-2 V-network programs require the LI-3P-263. A laboratory conducting both commercial and military programs at 63 A will need both instruments.

How is the LI-3P-463 used when conducting CE102 testing on a large shipboard three-phase motor drive system?

Large shipboard motor drives — driving fuel pumps, cooling water pumps, or hydraulic power units — commonly draw 40 to 60 A per phase from a ship's 440 V 60 Hz supply. The LI-3P-463 is energized from a regulated 440 V 60 Hz source replicating the ship bus, and the drive EUT connects at rated mechanical load using a dynamometer or resistive load bank. CE102 sweeps are performed on each conductor from 10 kHz to 10 MHz during steady-state and during a speed ramp to capture emissions that vary with motor speed. The cooling fans are activated before EUT energization and remain on throughout testing, which may last several hours for a complete CE102 data set across multiple EUT operating modes.

What does a CE102 test configuration for a military aircraft ground support power unit look like using the LI-3P-463?

Military aircraft ground support equipment (GSE) power units that supply 400 Hz power to parked aircraft typically draw 40 to 60 A per phase from a 50/60 Hz facility supply through an internal frequency converter. For CE102 testing, the LI-3P-463 is inserted between the facility 50/60 Hz supply and the GSE power input, with the GSE loaded at rated output power by a 400 Hz resistive or aircraft-representative load. CE102 sweeps from 10 kHz to 10 MHz on input phase conductors capture conducted emissions from the GSE's internal frequency conversion stages, ensuring the GSE will not contaminate airfield power distribution when used on operational flightlines.

How is the LI-3P-463 used at a government-owned test facility for MIL-STD-461G first article testing of high-power electronic assemblies?

At DoD-recognized test facilities, the LI-3P-463 is a permanent installation used for CE102 first article testing under MIL-STD-461G. When a contractor delivers a first article unit for government acceptance testing, the facility generates a CE102 test report with the LI-3P-463's individual calibration data applied as the insertion loss correction. The test report, signed by the responsible government test engineer, becomes part of the qualification documentation determining whether the production contract proceeds. The accuracy and traceability of the LI-3P-463 calibration directly affects the credibility and legal defensibility of the first article test results.

How do military field maintenance units use a portable CE102 test setup with the LI-3P-463 for in-service equipment verification?

Some defense organizations maintain a portable CE102 test capability using an LI-3P-463 with a portable EMI receiver and a generator-powered three-phase supply for in-service verification at forward maintenance facilities. When high-power three-phase equipment has been repaired or modified in the field, this portable setup allows the maintenance unit to verify CE102 compliance before returning the equipment to operational service — without shipping it back to a depot test facility. The LI-3P-463's forced-air cooling and multi-frequency power accommodation make it suitable for the range of field environments and platform power frequencies that forward maintenance personnel encounter.

What specific CE102 measurement challenges arise when testing high-power radar prime power assemblies with the LI-3P-463, and how are they managed?

High-power radar prime power assemblies present CE102 challenges including pulsed current demand synchronized to the radar pulse repetition frequency, very high instantaneous current peaks during transmission, and broadband switching noise from internal pulse modulators potentially 30 to 40 dB above the CE102 limit at certain frequencies. At 40 to 60 A per phase, the LI-3P-463 provides current headroom through peak demand. The built-in transient limiter protects the EMI receiver from high-energy current pulses during radar transmission. The measurement sweep must be synchronized or averaged to the radar's transmit duty cycle rather than capturing only the lower-emission receive interval, which requires coordination between the EMI receiver's measurement dwell time and the radar's pulse repetition interval.

How is the LI-3P-463 used at a submarine combat systems prime contractor to perform CE102 testing on a large three-phase motor drive before installation?

Submarine combat system programs require very stringent conducted emissions control because interference on the submarine’s power bus can compromise the platform’s stealth acoustic and electromagnetic signature. A three-phase motor drive drawing up to 63 A per phase is tested through multiple speed and torque setpoints to capture worst-case CE102 emissions from 10 kHz to 10 MHz on all four conductors. For submarine programs, CE102 limits are often more stringent than standard MIL-STD-461 limits, and the LI-3P-463 measurement data is submitted to the Navy program office for approval against the platform-specific CE102 limit curve before the drive is approved for installation.

What is a real-world scenario where the LI-3P-463 is used during a joint MIL-STD-461 and platform-specific EMC qualification test for a large three-phase aircraft ground power unit?

Large aircraft ground power units drawing up to 63 A per phase from a 50/60 Hz supply are loaded at rated 400 Hz output power by a representative aircraft power simulator or calibrated resistive load. CE102 sweeps from 10 kHz to 10 MHz verify compliance with MIL-STD-461 CE102 limits at the unit’s 50/60 Hz input. The forced-air cooling on the LI-3P-463 is essential because the ground power unit may run at full load for extended periods to simulate sustained aircraft power maintenance operations.

How is the LI-3P-463 used at a defense test laboratory conducting baseline characterization of CE102 emissions for a legacy platform upgrade program?

Legacy platform upgrade programs require pre- and post-upgrade CE102 characterization to demonstrate that the new technology does not increase the platform’s conducted emissions environment. The LI-3P-463 is used for both the pre-upgrade baseline measurement and the post-upgrade CE102 verification under identical conditions. The comparison of pre- and post-upgrade CE102 data from 10 kHz to 10 MHz on all four conductors forms the basis of the EMC delta analysis submitted to the program office.