VersaBridge® AC 3R — outdoor medium-voltage variable frequency drive, 4.16 kV, up to 2000 hp, NEMA 3R

Description

VersaBridge® AC 3R is a medium-voltage variable frequency drive in an NEMA 3R outdoor enclosure, designed for high-power drives without a separate electrical room. It is a factory-assembled system built for harsh conditions and high ambient temperatures: integrated HVAC and a fire detection system provide reliable operation where conventional systems require a building. Rated data: motor power 1500–2000 hp (up to 2000 hp for variable-torque loads and 1500 hp for constant torque), supply voltage 4.16 kV ±10 %, supply frequency 60 Hz ±5 %, output voltage 0–4.16 kV, output frequency 0–120 Hz (above this with derating), auxiliary supply 460 V, 60 Hz, three phases, heat dissipation 55 kW. The drive operates at ambient temperatures up to +50 °C without derating. Control: scalar V/Hz and vector; synchronous transfer of the motor to the line and pickup of a rotating load are supported to keep the process continuous; the efficient thermal design is rated for extreme conditions. The design is oriented to quick maintenance: a spacious enclosure gives convenient access to components, entry through the box gate simplifies work, the need for disassembly is minimized, and spare parts are available from stock. Like VersaBridge Classic, the drive is built on a multilevel cascaded H-bridge topology with low harmonic levels. Target applications: reciprocating compressors up to 1500 hp, high-pressure pumps up to 2000 hp, industrial fans and pumps, including those for bag filters and slurry systems, as well as remote sites and locations with limited space such as gas fields, compressor stations and mining operations. The solution suits both upgrades of existing installations and new facilities in harsh conditions. Manufacturing location: Round Rock, Texas.

Technical specifications