333021-C04 Filtering Reactor Product Description

Overview

333021-C04 is a filtering reactor (line reactor) with revision Rev:06, widely used in industrial drive, UPS and power quality correction systems. This 333021-C04 filtering reactor suppresses harmonic distortion, limits inrush current and smooths current waveform for VFD, rectifier and sensitive power loads, for new power skid build, power quality retrofit and spare‑part replacement of filter reactor assemblies.

Features

333021-C04 adopts iron-core inductance structure with insulated winding and robust mechanical frame. This filtering reactor is tuned for target harmonic frequency to attenuate harmonic current generated by IGBT rectifier front ends. 333021-C04 reduces voltage notch and commutation interference, protects inverter DC bus capacitor from high ripple stress. It supports continuous 24-hour operation under rated load, with class H insulation and temperature rise monitoring option. The compact heavy-duty housing is designed for cabinet floor or base mounting. It complies with IEC 60289 reactor standard and EMC requirements for variable torque drive systems.

Specs

• Model: 333021-C04

• Type: Filtering reactor, Rev:06

• Weight: 15 kg

• Insulation class: H class

• Application: Harmonic filtering, inrush current limiting for VFD/rectifier

• Mounting: Cabinet base mounting

• Standard: IEC 60289

Principle

333021-C04 uses inductive reactance to form a low-pass filtering path together with matched capacitor bank (filter circuit). It blocks high-frequency harmonic components while passing fundamental 50/60 Hz working current. During power-on, the inductance limits the charging inrush current of DC bus capacitors. The reactor absorbs commutation spikes and reduces waveform distortion, improving power factor and extending service life of downstream power electronics.

Applications

333021-C04 is deployed in water treatment VFD rooms, packaging & printing drive skids, compressor MCC cabinets and industrial UPS auxiliary power systems. This 333021-C04 filtering reactor is used for harmonic mitigation and drive front-end protection. It fits power quality overhaul and spare replacement of tuned filter reactor assemblies.

Installation & Maintenance Notes

Follow reactor wiring drawing during installation of 333021-C04. Keep sufficient ventilation space for heat dissipation; reactor generates heat under continuous load. Confirm matching capacitor bank and tuning frequency before commissioning. Check terminal torque, winding insulation and surface temperature periodically. Confirm exact part number 333021-C04 Rev:06; different revision reactors have different inductance values and cannot be substituted casually.