Busbar tap-off box AKM 806-250 for busbar distribution system Siemens BD-2Measuring device: UMG 806 without display windowEthernet interface: 1x RJ45RS485 interface: 2x M12Measuring device protection: circuit breaker Load side fuse: NH fuse switch disconnector, max. protection 250 A (fuses not included)Current measurement: 4x transformer 250A/5A Kl.1, 3 phases + NFault current measurement: CT-AC RCM 110N transformer for measuring residual currents type ATemperature measurement: 1x PT100Dimensions of tap-off box: (W x H x D) approx. 662 x 406 x 202 mm³Note: Options must always be ordered together with the basic device; later retrofitting is not possible.