Overview
The TCI KDRULD1L is a three-phase line reactor designed to protect variable frequency drives (VFDs) and power conversion equipment from electrical disturbances. Rated for 480/600V operation at 50A continuous current, this reactor is part of TCI’s legacy KDR UL series. KDR line reactors protect 6-pulse rectifiers and reduce harmonics and protect from voltage spikes. The KDRULD1L delivers robust harmonic mitigation and transient protection in industrial automation and motor control applications.
Key Features
- Can be used on both the input and output of a VFD, reducing voltage distortion at motor terminals and extending service life
- Reduces harmonic content and improves power factor in drive systems
- Protects VFD DC bus from voltage transients and capacitor-switching surges
- Helps prevent nuisance tripping caused by input phase unbalance
- Manufactured in Wisconsin and backed by lifetime warranty for the life of the drive
- UL Listed for safety compliance
Technical Specifications
| Voltage Rating | 480/600V, 3-phase |
| Current Rating | 50A continuous |
| Product Series | KDR UL (Legacy) |
| Termination Type | Ring Lugs (RL) |
| Application | Drive input or output protection |
| Certifications | UL Listed, CE-marked |
| Warranty | Lifetime (for life of drive) |
| Manufacturing Location | Wisconsin, USA |
| Part Number | KDRULD1L |
Typical Applications
- Harmonic mitigation on VFD input or output circuits
- Protection of drives connected to stiff power sources with high fault levels
- Motor load reactors to reduce PWM voltage stress on long cable runs
- Systems requiring nuisance-trip prevention and voltage spike suppression
- Industrial drive systems with sensitive controls or networked equipment
Compatibility & Replacements
Compatible With
- All variable frequency drive brands (3-phase AC drives)
- 6-pulse SCR and diode rectifier drives
- PWM drive systems requiring harmonic filtering
- Standard industrial electrical enclosures with 480V/600V three-phase distribution
- 35mm DIN Rail cabinets (via separate mounting accessories)
Replaces / Drop-In Replacement For
- Earlier TCI KDR UL series reactors at the same voltage and current ratings
- Custom-wound line reactors in 480/600V 50A applications
- Note: Verify part compatibility with your drive system and electrical integrator before ordering
Works With
- Rockwell Automation VFDs (CompactLogix, SLC, ControlLogix systems)
- Siemens SINAMICS VFDs
- Mitsubishi FR-A, FR-E series drives
- ABB ACS series drives
- Schneider Electric Altivar frequency converters
- Industrial control software and motion platforms supporting VFD integration
