2 Engineering2.5 Motor Selection34 DE1… Variable Speed Starter 11/16 MN040011EN www.eaton.com2.5.2 Circuit types with three-phase motorsThe three-phase motor’s stator winding can be connected in a star or deltacircuit as per the rated operational data on the rating plate.Figure 19: Example of a motorrating plateFigure 20: Configuration types:Star-connected circuit (left), Delta circuit (right)Examples based on figures 19 and 20DE1-124D3… or DE11-124D3… (U LN = 230 V): Motor in delta circuitDE1-342D1… or DE11-342D1… (U LN = 400 V): Motor in star connection2.5.3 Connecting EX motorsThe following aspects must be taken into account when connecting explo-sion-proof motors:• A DE1... variable speed starter can be installed inside an explosion-proofenclosure within the hazardous location or inside a control panel outsidethe hazardous location.• All applicable industry-specific and country-specific regulations forhazardous locations (ATEX 100a) must be complied with.• The specifications and instructions provided by the motor’smanufacturer with regard to operation with a variable speed starter –e.g., whether motor reactors (dV/dt limiting) are required – must betaken into account.• Temperature monitors in the motor windings (thermistor, thermo-Click)are not to be connected directly to DE1... variable speed starters butmust be connected via an approved trigger apparatus for EX areas i.e.EMT6.1410 mi n230/400 V 3.2/1.9 A50 Hz-10,75 KW cosϕ 0.79△ U1 V1 W1W2 U2 V2U1 V1 W1W2 U2 V2
