Variable Speed Drives

Variable speed drives Minimum operating costs and maximum energy savings, lowered maintenance effort and short amortization are factors that distinguish intelligent building and energy management. Our variable speed drives support these requirements in every way. For example, the fan and pump loads are automatically reduced when little or no demand exists. The SED2 variable speed drives have lots of functionality that can be optimized for HVAC requirements. Performance properties: * Low-noise EMC design: Suitable for all types of buildings * Reduction of harmonic currents on AC lines through Low Harmonics Technology (LHT) * Manual/Auto button * Space-saving design * Menu-guided quick commissioning * IP54 / IP20 housing * PID controller for fast and precise pressure control on pumps or fans * The hibernation mode starts and stops the variable speed drive on demand * Direct connection of the Ni1000 temperature sensors for simple ventilation plants * Pump cascading for up to two additional cascading pumps * Fan-belt monitoring for fans and pumps in two variants * Control of an external bypass * Flying restart * Automatic restart following a power failure or fault * Energy consumption meter (kWh meter) * Screwless terminals on removable I/O board