{"product_id":"abb-red670-line-differential-protection","title":"ABB RED670 Line Differential Protection","description":"\u003cp\u003eThe \u003cstrong\u003eABB RED670\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eRED670\u003c\/strong\u003e Line Differential Protection, operates as a dedicated hardware component for high-speed phase comparison and current differential calculation within power transmission networks. The device samples secondary analog current inputs from segmented instrument transformers to execute instantaneous fault trip routines across transmission grid infrastructures.\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\u003eRED670\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\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported CT Ratios\u003c\/td\u003e\n\u003ctd\u003e2000\/5 A, 100\/5 A, 600-300\/5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCT Class Compliance\u003c\/td\u003e\n\u003ctd\u003eC800 (at 2000\/5 A), C200 (at 100\/5 A and 600-300\/5 A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Fault Current Tolerance\u003c\/td\u003e\n\u003ctd\u003e40 kA (Switchgear rated fault capacity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Continuous CT Secondary Resistance\u003c\/td\u003e\n\u003ctd\u003e0.5 Ohm (at 2000\/5 A), 0.1 Ohm (at 100\/5 A), 0.66 Ohm (at 600-300\/5 A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +75 deg C (Standard series chassis specification)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eBase module hardware and I\/O channel allocation dependent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard subrack panel construction footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eDetermined by internal analog input transformer module allocation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProfinet \/ EtherNet\/IP Deterministic Networks Performance\u003c\/h3\u003e\n\u003cp\u003eDifferential trip calculations demand real-time data streaming that matches the backplane bus communication velocity of the central protection assembly. The high I\/O density scaling of the RED670 hardware permits concurrent sampling of multiple CT inputs, mapping the values into synchronous telemetry frames. Maintaining strict firmware flash compatibility between the analog measurement cards and the active network communication blocks is mandatory to ensure zero-jitter pulse processing over deterministic communication rings.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the RED670 processing unit remain active during a hot-swap modification of the analog input module?\u003c\/p\u003e\n\u003cp\u003eA: No. Hot-swapping the primary analog input hardware block is prohibited. Secondary current transformer circuits must be securely shorted and the auxiliary power isolated before extracting any internal board array to prevent high-voltage electrical arcing.\u003c\/p\u003e\n\u003cp\u003eQ: What are the cable loop resistance limitations for the 100\/5 A CT circuit configuration?\u003c\/p\u003e\n\u003cp\u003eA: The single-direction run between the junction point and the furthest CT must use AWG10 cable under 100 ft, enforcing a total loop resistance limitation of approximately 0.1 Ohm at 75 deg C.\u003c\/p\u003e\n\u003cp\u003eQ: Why must the CT ratios match across all designated terminal nodes?\u003c\/p\u003e\n\u003cp\u003eA: The line differential algorithm calculates vector differences across the protected zone; mismatched ratio scales across line terminals will distort the balance equation and induce false trip execution under normal through-fault conditions.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Circuit Isolation:\u003c\/strong\u003e Ensure all current transformer inputs are connected via shorting-type terminal blocks. Never open-circuit an active CT secondary line during physical wireways terminal modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding and Grounding Architecture:\u003c\/strong\u003e Terminate all analog copper cables using standard twisted-pair shielded conductors. Ground the outer copper shield at a single point on the entry gland plate to prevent localized circulating currents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Loop Length Validation:\u003c\/strong\u003e Restrict total loop runs to the calculated maximum foot boundaries (e.g., within 50 ft for AWG10 on 600-300\/5 A arrays) to verify total resistance stays within the 0.05 Ohm single-way specification at 75 deg C.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53050155991349,"sku":"RED670","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/RED6702_e0f14969-3413-4904-8f65-bd9e58b696ce.jpg?v=1782805251","url":"https:\/\/www.5gplc.com\/products\/abb-red670-line-differential-protection","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}