{"product_id":"abb-rej603bbb1onn3xb-rej603-series-protection-relay","title":"ABB REJ603BBB1ONN3XB REJ603 Series Protection Relay","description":"\u003cp\u003eConfigured for selective short-circuit and earth-fault measurement in secondary distribution networks, the \u003cstrong\u003eABB REJ603BBB1ONN3XB\u003c\/strong\u003e (\u003cstrong\u003eREJ603\u003c\/strong\u003e Self-Powered Feeder Protection Relay) provides direct physical\/electrical execution. The device derives its full operating excitation current directly from the secondary loops of the main current transformers, eliminating dependency on external auxiliary power infrastructure to run its internal measuring, processing, and tripping circuits.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eREJ603BBB1ONN3XB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eIndia \/ Finland\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003eSelf-powered via main current transformer secondary loops\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003ePhase current and earth-fault instrumentation lines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Stages\u003c\/td\u003e\n\u003ctd\u003eNon-directional overcurrent and earth-fault (low-set and high-set)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eOne impulse output channels dedicated for low-energy trip coil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInrush Protection\u003c\/td\u003e\n\u003ctd\u003eIntegrated transformer inrush restraint logic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eDependent on active phase current transformer input saturation levels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eCompact footprint designed for Ring Main Unit (RMU) slotting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eStandard protection grade assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ebackplane bus communication velocity Licences Alignment\u003c\/h3\u003e\n\u003cp\u003eThe operational execution of inverse and definite time overcurrent algorithms within this self-powered assembly requires synchronized coordination with internal measurement buses. The hardware architecture incorporates rigid I\/O density scaling profiles optimized to handle rapid low-energy impulse output discharge sequences without internal logic disruption. To prevent calculation delays or thermal saturation over long-term operations, strict firmware flash compatibility standards are applied to maintain stable scaling factors across all integrated sensor elements without requiring external diagnostic interfaces.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the REJ603BBB1ONN3XB support live hot-swap replacement within the RMU cabinet?\u003c\/p\u003e\n\u003cp\u003eA: No. Hot-swapping is prohibited. Before removing the plug-in housing assembly, external current transformer secondary wires must be short-circuited to prevent destructive open-circuit voltages from damaging the terminal interface blocks.\u003c\/p\u003e\n\u003cp\u003eQ: What is the mechanical and electrical limitation of the trip output circuit?\u003c\/p\u003e\n\u003cp\u003eA: The device features a single, dedicated low-energy impulse output channel. This circuit is explicitly rated to interface with low-energy trip coils and must not be connected directly to standard heavy shunt-trip coils.\u003c\/p\u003e\n\u003cp\u003eQ: How does the module maintain protection configuration parameters when the feeder line is de-energized?\u003c\/p\u003e\n\u003cp\u003eA: All user-defined threshold matrices and definitive time characteristics are written directly into non-volatile internal registers that do not require continuous auxiliary or battery power paths to maintain integrity.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Transformer Minimum Threshold Activation:\u003c\/strong\u003e Verify that the primary feeder load complies with the minimum startup current parameters of the current transformer to ensure the relay receives sufficient energy to initialize its internal logic layers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Energy Impulse Output Wireways:\u003c\/strong\u003e Keep the connection path between the impulse output terminal block and the low-energy trip coil as short as possible. Use twisted-pair copper conductors to avoid electromagnetic noise pickup from parallel power paths.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabinet Earth Ground Bonding:\u003c\/strong\u003e Attach a dedicated, low-impedance ground braid from the relay casing grounding terminal screw directly to the main copper earth bar of the Ring Main Unit.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53050196033845,"sku":"REJ603 REJ603BBB10NN3XB","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/REJ603REJ603BBB10NN3XB__2.png?v=1782806932","url":"https:\/\/www.5gplc.com\/products\/abb-rej603bbb1onn3xb-rej603-series-protection-relay","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}