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| New enclosed drive controllers for HVAC applications  Square D brand E-Flex enclosed drive controllers are an efficient and economical solution for commercial and industrial HVAC pump and fan applications. The E-Flex enclosed drive controllers are well-suited for HVAC systems in buildings, hospitals, schools, manufacturing facilities, airports and convention centers. The rugged components and sturdy industrial-grade enclosures of the E-Flex enclosed drives are designed to withstand harsh environments and meet the 2003 International Building Code and ASCE 7 standards for seismic qualification. The product is designed and constructed to withstand the violent vibrations of a seismic event.The enclosed drives feature fully rated motor isolation and bypass contactors, with mechanical and electrical interlocks to prevent accidental voltage back feed. A standard feature includes a 3% line reactor to provide transient protection from surge and overvoltage, and to minimize line harmonic currents. E-Flex enclosed drive controllers meet both indoor and outdoor application requirements with Type 1, Type 12/12K and Type 3R enclosures. Type 1 enclosures are designed for indoor, non-dusty environments, while Type 12/12K enclosures protect against dust and dripping liquids. Type 3R enclosures permit installation on rooftops or other outdoor locations and allow operations in temperatures ranging from 14°F to 122°F. The E-Flex enclosed drive controller features the new Telemecanique brand Altivar 61 AC drive, which is available in two models: 1 to 50 hp at 208V to 230V, and 1 to 100 hp at 460V. Other standard features of the enclosed drives include: top and bottom conduit knockouts for ease of installation; door-interlocked circuit breaker disconnect; 3% line reactor for harmonic reduction; variable torque ratings for pump and fan loads; and a door-mounted keypad. E-Flex enclosed drive controllers feature integrated Modbus and CANopen ports and are easily expandable with serial communication card options that include: LonWorks, BACnet, Ethernet, Profibus, Modbus Uni-Telway, Apogee P1 and Metasys N2. write your comments about the article :: © 2006 Construction News :: home page |