grundfos data booklet

SP A, SP66. AccessoriesCUE frequency converterThe Grundfos CUE is a series of external frequencyconverters designed for speed control of a wide rangeof Grundfos pumps.When a CUE is installed, the motor requires no furthermotor protection.The CUE offers quick and easy set-up andcommissioning compared to a standard frequencyconverter because of the start-up guide. Simply key inapplication-specific variables such as motor data,pump family, control function (for example constantpressure), sensor type and setpoint, and the CUE willautomatically set all necessary parameters.The CUE enables gentle pumping and thereby protectsthe water reservoir and the rest of the distributionsystem, as water hammer can be avoided by adjustingramp times up and down.Overview of the CUE rangeAccessoriesSupply voltage[V]3 x 525-6903 x 525-6003 x 380-5003 x 200-2401 x 200-240Power range [kW]0.55 0.75 1.1 7.5 11 45 250The CUE is available in two enclosure classes:• IP20/21• IP54/55.RFI filtersTo meet the EMC requirements, the CUE comes withthe following types of built-in radio frequencyinterference filter (RFI).Voltage[V]Typical shaftpower, P2[kW]RFI filter type1 x 200-240 1.1 - 7.5 C13 x 200-240 0.75 - 45 C13 x 380-5000.55 - 90 C1110 - 250 C23 x 525-600 0.75 - 7.5 C33 x 525-690 11 - 25 C3ApplicationDomesticDomestic/industryIndustryFig. 15 The CUE rangeFunctionsThe CUE has a wide range of pump-specific functions,such as:• constant pressure• constant level• constant flow rate• constant temperature• constant curve.CUE features• Start-up guideThe CUE incorporates an innovative start-up guidefor the general setting of the CUE including thesetting of the correct direction of rotation.The start-up guide is started the first time the CUEis connected to the power supply.• Check of direction of rotation.• Duty/standby operation.• Dry-running protection.• Low-flow stop function.Accessories for the CUEGrundfos offers various accessories for the CUE.GrA4404 340777