PMM L3-32 Artificial Mains Network
| Brand | PMM |
|---|---|
| Origin | Italy |
| Model | L3-32 |
| Max. Current Rating | 500 A |
| Compliance | CISPR 16-1-2, IEC/EN 55016-1-2, MIL-STD-461G (CS114), ANSI C63.4 |
| Configuration | 3-phase, 4-wire (L1/L2/L3/N/PE) |
| Frequency Range | 9 kHz – 30 MHz |
| Insertion Loss | >60 dB (typical, 150 kHz–30 MHz) |
| Impedance | 50 Ω |
Overview
The PMM L3-32 Artificial Mains Network is a precision-engineered, three-phase LISN (Line Impedance Stabilization Network) designed for standardized conducted electromagnetic interference (EMI) emission testing in accordance with CISPR 16-1-2, IEC/EN 55016-1-2, and supplementary military and aerospace requirements including MIL-STD-461G (CS114) and ANSI C63.4. It provides a stable, repeatable 50 Ω || (50 µH + 5 Ω) impedance across the 9 kHz to 30 MHz frequency band, isolating the equipment under test (EUT) from variations in mains impedance while ensuring accurate, reproducible measurement of common-mode RF noise injected onto power lines. Its robust 3-phase, 4-wire (L1/L2/L3/N/PE) architecture supports high-current applications up to 500 A continuous per phase, making it suitable for industrial drives, UPS systems, EV charging infrastructure, and large-scale power electronics where conventional single-phase LISNs are insufficient.
Key Features
- Triple-channel design supporting simultaneous monitoring of L1, L2, and L3 lines — each with dedicated 50 Ω RF output ports and integrated 10 dB attenuators for signal conditioning and receiver protection
- High-current capability: rated for continuous operation at 500 A per phase, with thermal management optimized for extended test cycles under load
- Integrated overcurrent protection and visual status indicators for line voltage, grounding integrity, and RF port activity
- Low insertion loss (60 dB typical above 150 kHz) ensures minimal perturbation to EUT operation while maintaining measurement fidelity
- Mechanically rugged aluminum enclosure with EMI-tight gasketing and filtered feedthroughs for PE and neutral lines — certified to IP54 for laboratory and semi-industrial environments
- Calibration traceable to national metrology institutes (e.g., INRIM, PTB), with optional factory calibration report including amplitude and phase response data across full frequency range
Sample Compatibility & Compliance
The L3-32 is compatible with all standard EMI receivers, spectrum analyzers, and EMI test receivers equipped with 50 Ω input impedance (e.g., Rohde & Schwarz ESL/EFS, Keysight N9000B, Tektronix RSA5000). It supports both Class A and Class B emissions limits per CISPR 32 and EN 55032. The network meets the impedance stability and decoupling performance requirements specified in Annex D of CISPR 16-1-2 for three-phase configurations. For regulatory submissions requiring audit readiness, the unit supports GLP-compliant documentation workflows and is routinely deployed in accredited test laboratories operating under ISO/IEC 17025:2017. Its design facilitates seamless integration into automated EMC test systems compliant with IEC 61000-4-6 (conducted immunity) pre-scan and final validation sequences.
Software & Data Management
While the L3-32 operates as a passive, hardware-based LISN without embedded firmware or onboard software, it is fully interoperable with industry-standard EMC test automation platforms including EMQuest, Teseq’s EMC Studio, and Keysight PathWave EMI. Its consistent RF port output characteristics enable reliable scripting of sweep-based measurements, limit line comparisons, and margin analysis across multi-line configurations. When used with calibrated receivers supporting CISPR peak/quasi-peak/average detectors, the network contributes directly to measurement uncertainty budgets defined in ANSI C63.27 and IEC 61000-4-29. All calibration certificates include full traceability metadata required for FDA 21 CFR Part 11–aligned quality records in regulated medical device development environments.
Applications
- Conducted emissions verification for variable-frequency drives (VFDs), industrial PLCs, and motor control cabinets
- Pre-compliance and certification testing of EV on-board chargers (OBC), DC fast-charging stations (IEC 61851-21-2), and battery energy storage systems (BESS)
- EMI characterization of three-phase inverters used in photovoltaic (PV) microgrids and wind turbine converters
- Immunity pre-scan support for IEC 61000-4-6 testing, providing clean, stabilized impedance during RF injection
- Research-grade noise source modeling in power electronics labs, especially for harmonic and interharmonic coupling studies between phases
FAQ
What standards does the PMM L3-32 comply with for conducted emissions testing?
It complies with CISPR 16-1-2, IEC/EN 55016-1-2, ANSI C63.4, and supports test configurations referenced in MIL-STD-461G CS114.
Can the L3-32 be used for both emission and immunity testing?
Yes — it serves as a LISN for emissions measurement and as an impedance stabilization network during conducted immunity tests per IEC 61000-4-6.
Is calibration included with purchase?
Factory calibration is available optionally; a traceable certificate with frequency-response data can be supplied upon request.
Does the unit require external power or active cooling?
No — it is fully passive and air-cooled; no external power supply or fan is needed.
How is grounding implemented in the L3-32 configuration?
It features dedicated low-inductance PE terminals with star-point grounding topology to minimize ground-loop currents and ensure RF reference stability.
