1 DE1... series1.7 Selection criteria18 DE1… Variable Speed Starter 11/16 MN040011EN www.eaton.com1.7 Selection criteriaDE1... variable speed starters should be selected based on the supply voltageprovided by the mains (ULN ) and the rated operational current of the motorbeing used. The motor’s configuration (Δ / ) must match the supplyvoltage.The DE1... variable speed starter’s rated output current Ie must be greaterthan or equal to the rated motor current.When selecting a variable speed starter, the following criteria must beknown:• Mains voltage = The motor’s rated operating voltage• Type of motor (e.g., three-phase asynchronous motor)• The rated motor current (point of reference – depends on the motor’sconfiguration and on the power supply)• Ambient conditions (ambient temperature for DE1..., required degree ofprotection)Example based on figure 13• Mains voltage: 3~ 400 V, 50 Hz• Centrifugal pump motor• Star-connected circuit (400 V)• Rated operational current: 1.9 A (400 V)• Enclosure installation(Max. ambient temperature of 50 °C without output reduction, IP20)￫ Variable speed starter that should be selected: DE1-342D1…• …-34: 3-phase, 400 V• …2D1: 2.1 A (1.9 A rated motor current)P-07: Nominal motor voltageP-08: Rated motor currentP-09: Rated motor frequencyP-10: Motor rated speedFigure 13: Selection criteria1410 mi n230/400 V △ 3.2/1.9 A50 Hz-10,75 KW cosϕ 0.79P-07 P-08P-10 P-09L1/L L2/N L3U V W0 V +10 V 1 2 3 4 13 14
