Packaged Drives
E-Flex™ Type 3R

E-Flex AC Type 3R drives are packaged, outdoor-rated, adjustable speed drive solutions for commercial and industrial HVAC and pump applications. The E-Flex Type 3R drive is well suited for overcrowded mechanical rooms and long conduit runs commonly found in retrofit applications for large HVAC systems. The ability to install E-Flex Type 3R drives on rooftops and other outdoor locations -- rain or shine -- allows users to maximize their energy savings potential by 50% or more. Unique, bottom conduit entry with pre-punched knockouts facilitates installation.

E-Flex Type 3R drives are compatible with Altivar® 58 communication cards, I/O extension cards and operator interface options. Standard HVAC protocols such as LonWorks and Johnson Controls N2 are also available.

Available Ratings

• 1 - 100 HP variable torque 460 VAC, three-phase input
• 1 - 50 HP variable torque 208/230 VAC, three-phase input

Features and Benefits

• Product integrity and reliability
  - UL 508C listing and coordination with NEMA ICS 7.1 standards exceed minimum UL AIC requirements
  - Coordinated circuit breaker eliminates line input fuse requirements
  - Mechanically linked, emergency, full-speed bypass option prevents accidental voltage backfeeding
• Application flexibility
  - Thermal management system for -10 to +50°C ambient temperatures allows operation "rain or shine"
  - Thermostatically controlled space heater
• Ease of Use
  - Pre-punched conduit knockouts simplify installation
  - Pre-programmed for HVAC variable torque operation and pre-wired with HVAC controls
  - Type 2B wiring terminals facilitate wiring