Compact, cost-effective and completely integrated system for applications requiring enhanced harmonic control. Packages seamlessly combine the reliability and advanced performance for the VLT® Series Drives with best in class 12 & 18 pulse harmonic reduction technology. The result is a complete solution for the supplier you trust.
Each unit will ship completely assembled in a free standing enclosure labeled as conforming to UL Type 1, 12, or 3R as required by the installation. Units require simple four-wire-in and four-wire-out power connections. The entire package is UL 508A Industrial Control Panel.
All 12-Pulse bridges are separated from the VFD's rectifiers. These bridges are separate from the VFD's standard 6-pulse bridge to ensure appropriate load sharing and harmonic reduction. Input to the rectifiers is an electro-statically shielded phase shifting drive isolation transformer.
All 18-Pulse units include three 6 diode bridge rectifiers. These bridges are separate from the VFDs standard 6-pulse bridge to ensure appropriate load sharing and harmonic reduction. Input to the rectifiers is an auto-transformer with the design criteria listed below.
Meet IEEE 519-1992 at drive input terminals (18-pulse)
Help meet IEEE 519-1992 at the system level
Improved total power factor
No external filters or transformers needed
Improves overall electrical system efficiency