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Busbar tap-off box AKM 806-250 for busbar trunking system Siemens BD-2Measuring device: UMG 806 without display viewing windowEthernet interface: 1x RJ45RS485 interface: 2x M12Measuring device protection: circuit breaker Fuse load side: NH fuse load disconnect switch,max. protection 250 A (fuses not included in scope of delivery)Current measurement: 4x current transformer 250A/5A accuracy class 1, 3 phases + NResidual current measurement: current transformer CT-AC RCM 80Nfor measurement of residual currents type ATemperature measurement: 1x PT100Dimensions tap-off box: ( W x H x D ) approx. 662 x 406 x 202 mm³Note: Options must always be ordered together with the base device, subsequent retrofitting is not possible.