Lenze 391423 EZN3B0300H013 3-Phase Mains Choke 30A 1.3mH
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Product Information
The Lenze 391423 (model EZN3B0300H013) is an industrial-grade 3-phase mains choke from the EZN series designed to optimize power quality and protect frequency inverter installations. Operating on 3-phase utility distribution feeds up to 480 V AC (+10%), this line reactor delivers a continuous rated current of 30 A and an inductance of 1.3 mH per phase. Installed on the line side of variable frequency drives, the component actively suppresses dangerous voltage transients, limits peak inrush currents, and dampens total harmonic distortion across industrial power networks in factory automation, packaging machinery, material handling, pumping, and HVAC applications.
Connecting the EZN3B0300H013 line reactor requires standard 3-phase AC wiring between the main supply network and the input terminals of the frequency drive, as well as a low-impedance protective ground connection directly to the control cabinet chassis. As a purely passive hardware component, the choke operates without software tools, firmware versions, or parameter settings. Replacing an existing unit is a direct mechanical and electrical swap that requires verifying wire termination integrity and grounding contact. ABC Industrial Parts supplies tested replacement units to restore line protection quickly without requiring complex commissioning routines.
Because this line reactor is a passive magnetic device without LED indicators or digital diagnostics, troubleshooting relies on standard electrical measurements at the cabinet level. Maintenance personnel investigating frequent intermediate DC-bus overvoltage trips or drive fault conditions should inspect phase balance, terminal torque, supply voltage levels, and coil integrity. Internal winding damage, thermal overload deterioration, or insulation breakdowns are not field-repairable and require replacing the complete assembly. Installing a replacement through ABC Industrial Parts ensures continued damping of grid harmonics and extends the operating lifespan of connected power semiconductors.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 391423 |
| Model / Type | EZN3B0300H013 |
| Component Type | 3-Phase Mains Choke |
| Product Family | EZN Series |
| Rated Continuous Current | 30 A |
| Inductance per Phase | 1.3 mH |
| Maximum Supply Voltage | 480 V AC (+10%) |
| Number of Phases | 3 |
| Compatible Drive Series | Lenze 8200 vector, Lenze 9300 series |
Replacement and Spare Part Considerations
When selecting a replacement line reactor for an existing automation system, technicians must ensure that the replacement unit matches the exact electrical performance ratings of the original design. The Lenze 391423 (EZN3B0300H013) provides 1.3 mH of inductance per phase at a rated continuous current of 30 A on 480 V AC systems. Substituting a choke with lower current or inductance ratings can lead to excessive thermal stress, reduced harmonic attenuation, or frequent drive overvoltage trips.
The EZN3B0300H013 is engineered for seamless integration with Lenze 8200 vector series and Lenze 9300 series frequency inverters. Because the unit contains no digital memory, parameter registers, or firmware, swapping out a failed choke requires no parameter backup or software upload. Physical mounting and firm low-impedance grounding directly to the panel enclosure are essential to ensure full surge suppression and system safety.
Frequently Asked Questions
Does the Lenze 391423 line reactor require software setup or parameter configuration?
No. The Lenze 391423 (EZN3B0300H013) is a purely passive inductive hardware component. It requires zero parameter configuration, firmware alignment, or software programming during installation.
Which drive controllers are compatible with the Lenze EZN3B0300H013 mains choke?
This 3-phase mains choke is specifically designed for use on 480 V AC power feeds supplying legacy Lenze frequency inverters, including the Lenze 8200 vector series and Lenze 9300 series.
What are the main electrical specifications of the Lenze 391423?
The component is rated for a continuous current of 30 A, an inductance of 1.3 mH per phase, and operates on 3-phase AC supply networks up to 480 V AC (+10%).
What function does the mains choke perform in a drive installation?
The choke limits peak inrush currents, suppresses incoming supply voltage spikes, dampens line harmonics, and mitigates phase asymmetry to protect drive power semiconductors and reduce total harmonic distortion.
What installation steps are required when swapping out a damaged choke?
Installation requires mounting the hardware into the enclosure, connecting the three supply and load phases to the appropriate terminals, and securing a clean, low-impedance protective earth grounding wire to the cabinet metalwork.
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Specific firmware and hardware versions
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Disclaimer:
We are not an authorised distributor of Lenze.
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