Transformer Un - 230 V AC, adjusting the supply voltage of supervisory relays: MR-GI.., MR-GU.., MR-GT.., TIH, TIW, TUH, TUW, TPW, TDT4X. It is an integral part of the relay, ordered separately. It does not increase the dimensions of the relay. Dimensions: 32 x 35 x 16mm. IP 20.