The ABB 2CSJ201001R0001 is an RD3-48 electronic residual current relay from the RD3 series. It provides residual current protection and earth-fault monitoring, and works with the whole ABB S200 miniature circuit breaker range and with Tmax moulded-case breakers up to T5, which is why it is normally specified for industrial boards rather than for final domestic circuits. It is a Type A device, so it detects sinusoidal AC and pulsating DC residual currents. Sensitivity and tripping delay are both set on the device, which is what lets one part number cover a range of installations and lets discrimination be arranged with the devices downstream. Supply voltage is 12 … 48 V AC/DC. This is the base version of the series: no frequency filter and no pre-alarm threshold, with manual reset. Where variable-speed drives are present, or where advance warning of failing insulation is wanted, the RD3M or RD3P covers that. Supplied by cBallast on quote-to-invoice terms; lead time and freight are quoted per RFQ against the destination Incoterm.