Lenze 325293 Choke 3x2,5mH – Mains Line Reactor

The Lenze 325293 (also designated 00325293) is a three-phase mains line reactor from Lenze's Mains Chokes family, engineered for line-side power conditioning in variable frequency drive installations. Designated as model Choke 3x2,5mH and commonly deployed alongside Lenze ELN and EZ series drive equipment, this passive component provides essential power quality enhancement between the electrical supply grid and downstream drive electronics. Operating on three-phase AC power supply systems up to 480 V AC (+10%), the unit features a continuous rated current of 3 A and an inductance rating of 2.5 mH per phase. By mitigating grid harmonic distortion, suppressing transient voltage surges, and smoothing current waveforms, it safeguards sensitive power semiconductors and extends the operational lifespan of internal DC link capacitors.

Connecting the Lenze 325293 line reactor into a machine panel involves wiring the incoming three-phase supply network to the choke input and feeding the output directly into the input terminals of a compatible frequency inverter rated up to 3 A. As a passive inductive filtering component, the unit requires no software configuration, firmware alignment, or parameter programming prior to service. Commissioning a replacement unit requires verifying that the physical wiring connections match the original line-side layout and that the connected drive load does not exceed the continuous current rating. When preparing replacement hardware or setting up panel spares, ABC Industrial Parts can assist maintenance teams with sourcing components to match existing drive configurations.

Because the Lenze 325293 operates without active electronics or display screens, diagnostic evaluation relies on visual and electrical inspection methods. Service technicians can check the hardware for visual signs of mechanical damage or thermal discoloration caused by severe electrical overloads. Electrical verification is performed by taking phase-to-phase inductance measurements using a standard LCR meter to confirm that each phase maintains its nominal 2.5 mH specification. If an internal winding insulation break or phase imbalance is identified, the unit cannot be adjusted in the field and must be replaced. ABC Industrial Parts supports rapid restoration by providing replacement mains line reactors to minimize machine downtime.