Lenze 387071 EZN3A2400H002 3-Phase Mains Choke
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Product Information
The Lenze 387071 (model EZN3A2400H002) is a 3-phase mains choke from the EZN series designed for inductive mains decoupling, harmonic filtering, and peak current smoothing in industrial drive applications. Rated for continuous operating currents up to 2.4 A and an inductance of 2.4 mH, this line reactor operates on AC supply systems up to 500 V AC. Featuring an open-frame IP00 design with screw terminals, the unit is constructed for panel mounting inside control enclosures. It serves as an input line buffer for variable frequency drives, attenuating line voltage harmonics, suppressing peak current surges, and protecting sensitive inverter power stages.
Connecting the unit into a drive system relies on heavy-duty screw terminals arranged for 3-phase line input, drive output, and protective earth grounding. Because the Lenze 387071 is a passive inductive component, commissioning a replacement unit does not involve software configuration, parameter transfers, firmware alignment, or address settings. Swapping out a failed unit requires confirming that the replacement matches the specified 2.4 A current rating, 2.4 mH inductance, and 500 V AC maximum line voltage. When replacing a damaged unit, ABC Industrial Parts can supply tested spare units to restore drive protection without unnecessary machinery downtime.
Because the EZN3A2400H002 contains no active control electronics or status LEDs, fault tracing relies on standard electrical checks across the power path. Operational issues are typically caused by loose screw terminal connections, line phase imbalances, or severe transient overvoltages from the AC supply grid. First-line troubleshooting involves verifying terminal screw torque, checking supply line voltages across all three phases, and inspecting the unit for visual signs of thermal stress. When winding or internal insulation degradation occurs, field repair is not possible, and installing a verified replacement unit provided by ABC Industrial Parts is the fastest solution to ensure full line decoupling.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 387071 |
| Model / Type | EZN3A2400H002 |
| Component Type | Mains Choke |
| Product Family | EZN Mains Chokes |
| Rated Current | 2.4 A |
| Inductance | 2.4 mH |
| Maximum Supply Voltage | 500 V AC |
| Number of Phases | 3 |
| Protection Rating | IP00 |
| Termination Type | Screw Terminals |
Replacement and Spare Part Considerations
Replacing a Lenze 387071 line reactor requires verifying key electrical parameters to maintain drive system stability and protection. The replacement unit must match the 2.4 A rated continuous current, 2.4 mH nominal inductance, and maximum supply voltage threshold of 500 V AC. Correct parameter matching ensures that connected Lenze 8200 Vector or 9300 series drives receive proper harmonic attenuation and peak current smoothing without causing excessive voltage drops across the input power stage.
Mechanical installation must account for the open-frame IP00 rating, requiring the unit to be mounted within a protected industrial enclosure to prevent direct contact and exposure to conductive pollution. Screw terminals require secure physical terminations for all three supply phases and the protective earth grounding point. Maintenance technicians should verify terminal torque specs and ensure sufficient clear space around the choke structure inside the cabinet to facilitate natural thermal dissipation during continuous operation.
Frequently Asked Questions
What is the purpose of the Lenze 387071 mains choke?
The Lenze 387071 (EZN3A2400H002) provides 3-phase inductive mains decoupling, attenuates supply line harmonics, and dampens peak input current surges to protect connected drive controllers.
Which drive series are compatible with the Lenze EZN3A2400H002 line reactor?
This choke is designed for integration with Lenze 8200 Vector series frequency inverters and Lenze 9300 series servo and frequency drives operating on 3-phase power lines up to 500 V AC.
Does replacing a Lenze 387071 choke require software setup?
No. As a passive inductive component, the Lenze 387071 requires no software programming, parameter configuration, firmware matching, or address settings during installation.
What are the primary electrical specifications for the EZN3A2400H002?
The unit is rated for 2.4 A continuous current, 2.4 mH nominal inductance, 3-phase AC input, and a maximum operating supply voltage of 500 V AC.
What protection rating and terminal style does this choke feature?
The Lenze 387071 features an IP00 open-frame design intended for cabinet mounting, equipped with heavy-duty screw terminals for 3-phase power connections.
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