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Variable speed drive, ATV21, 1,5kW 2HP, 480V, EMC filter class B, IP54. range of product: Altivar 21 - product or component type: variable speed drive - product destination: asynchronous motors - assembly style: with heat sink - component name: ATV21 - EMC filter: class B EMC filter integrated - network number of phases: 3 phases - line current: 2.6 A for 480 V, 3.2 A for 380 V - asynchronous motor control profile: constant voltage/frequency ratio, constant voltage/frequency ratio with automatic IR compensation, current flux vector control (FVC) without speed feedback, energy saving ratio, quadratic voltage/frequency ratio - type of polarization: no impedance - IP degree of protection: IP54 conforming to EN 60530, IP54 conforming to EN 61800-5-2, IP54 conforming to IEC 60529, IP54 conforming to IEC 61800-5-1 - option card: APOGEE FLN communication card, BACnet communication card, LonWorks communication card, METASYS N2 communication card. Benefits: A new breath for your applications!. Open to the main building communication networks. Compact with an economical design specialy think up to answer your needs. Applications: Range dedicated to building HVAC apllications. All essential functions for variable torque pumps and fans applications:, PI regulator, preset PI, Automatical restart, recovery with the flight, Skip frequencies, Belt breakage detection, Overload detection and under load detection.