Lenze EZAELN3004B742 Mains Choke 3X 4A 7.4mH
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Product Information
The Lenze EZAELN3004B742 is a 3-phase mains choke in the ELN product series, designed to limit current peaks and suppress harmonic distortion on power lines feeding variable frequency drives. Engineered for continuous operation at a rated current of 4 A and providing a nominal inductance of 7.4 mH, this passive electromagnetic line reactor smooths input current waveforms and dampens voltage surges. Operating across 3-phase AC electrical supply systems up to 480 V AC at 50/60 Hz, the component features an IP00 open-frame construction intended for installation inside standard electrical control cabinets.
Integrating a replacement mains choke into an existing machine installation involves standard panel mounting and 3-phase wiring across the input and output terminals (L1-U, L2-V, L3-W). As a purely passive line reactor, the EZAELN3004B742 requires no parameter setting, software tools, or firmware alignment during commissioning. When replacing an existing unit, technicians must ensure that terminal connections are correctly torqued and that phase wiring matches the incoming grid lines and drive input terminals. Matching the electrical ratings—specifically the 4 A continuous current capacity, 7.4 mH inductance, and 480 V AC voltage rating—ensures full hardware interchangeability. ABC Industrial Parts can assist maintenance teams with sourcing exact-fit replacement units to keep production lines running smoothly.
Because the EZAELN3004B742 operates as a passive device without active electronics or onboard status indicators, routine troubleshooting relies on physical inspection and electrical measurements. Basic diagnostics involve performing winding resistance measurements across all three phases (L1-U, L2-V, L3-W) to verify symmetrical phase resistance, along with insulation resistance testing to earth. Unbalanced phase resistance or insulation breakdown indicates internal winding degradation or coil failure. When winding faults occur, internal repairs are not practical in the field, making replacement with a tested spare or functional exchange unit from ABC Industrial Parts the most efficient approach to restore equipment operation.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EZAELN3004B742 |
| Model / Type | Mains Choke 3X 4A |
| Product Family | ELN |
| Component Type | Mains Choke |
| Rated Current | 4 A |
| Nominal Inductance | 7.4 mH |
| Number of Phases | 3 |
| Maximum Supply Voltage | 480 V AC |
| Protection Rating | IP00 |
| Catalog Reference | ELN3-0040H004 |
Diagnostics and Status Indication
The Lenze EZAELN3004B742 is a passive electromagnetic line choke without electronic status displays or integrated diagnostic circuitry. Verifying the functional condition of the choke is accomplished through manual electrical testing during scheduled maintenance or system troubleshooting.
First-line diagnostic checks include measuring winding resistance symmetrically across all three phase circuits (L1-U, L2-V, L3-W) using a precision resistance meter. Additionally, insulation resistance tests should be performed between each phase winding and protective earth to detect ground faults or insulation failure due to thermal stress.
Replacement and Spare Part Considerations
When selecting a replacement mains choke for a drive system, verifying electrical ratings is crucial to ensure proper drive protection and grid power quality. The replacement unit must match the 4 A continuous current rating, 7.4 mH nominal inductance, and 3-phase 480 V AC voltage specification of the original EZAELN3004B742.
This model corresponds to the catalog designation ELN3-0040H004 within the Lenze ELN series. Because the component has an open IP00 protection rating, adequate enclosure space and ventilation inside the control cabinet must be maintained to prevent overheating and maintain proper safety clearances.
Since the EZAELN3004B742 contains no digital memory, parameter sets, or programmable components, swap-out replacement requires no configuration backups or software procedures. Service personnel only need to perform mechanical mounting and secure electrical terminal connections.
Frequently Asked Questions
What are the primary electrical ratings of the Lenze EZAELN3004B742 mains choke?
The EZAELN3004B742 is a 3-phase mains choke rated for a continuous current of 4 A, a nominal inductance of 7.4 mH, and a maximum supply voltage of 480 V AC at 50/60 Hz.
Does the EZAELN3004B742 line reactor require programming or configuration?
No, the EZAELN3004B742 is a passive electromagnetic component and does not contain firmware, software, parameter memory, or digital control logic.
How can technicians test the EZAELN3004B742 for internal faults?
Diagnostics are performed by measuring winding resistance across all three phases (L1-U, L2-V, L3-W) to confirm resistance balance, as well as testing insulation resistance between each phase winding and protective earth.
What catalog number corresponds to the EZAELN3004B742?
The EZAELN3004B742 corresponds to the catalog designation ELN3-0040H004 within the Lenze ELN product series.
What mounting and environmental protection rating does this mains choke have?
It features an IP00 protection rating, meaning it is an open-frame unit designed specifically for installation inside a protective electrical enclosure or control panel.
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Disclaimer:
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