TRANSFORMER SITAS, PHASES:3, PN/PN(S6)(KVA):8 /39, UPRI(V):Y500-440-380+/-20/D289- 254-220+/-11, USEC(V):Y 400 / D 230, ISEC(A):11, 52-19, 9, F(HZ):50...60, SWITCHING GRADE/SHIELDING:IIIIII0 /0, TA/ISOKL:55 /H, IP23, CONNECTION:SCREW CONNECTION, MOUNTING:SCREWS, EN 61558-2-1, -2-2, -2-4 >UL/CSA-RECOGNIZED< >CONTROL TRANSFORMER< >ISOLATING TRANSFORMER< The 3-phase transformers 4AU are designed as isolating, safety or mains matching transformers with different primary and secondary voltages and vector groups. They are suitable for fuseless construction due to their low inrush current, and with Sirius 3RV circuit breakers.