{"product_id":"abb-rk638007-ba-comparator-unit","title":"ABB RK638007-BA Comparator Unit","description":"\u003cp\u003eThe \u003cstrong\u003eABB RK638007-BA\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eRK638007-BA\u003c\/strong\u003e Comparator Unit (designated as RLHE 103), serves as the primary \u003cstrong\u003eRK638007-BA\u003c\/strong\u003e analog current comparator utilized to execute real-time current comparison across REB103 busbar protection relay platforms.\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\u003eRK638007-BA (RLHE 103)\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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e8.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e33.8 cm x 28.2 cm x 20.6 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-25 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eSystem bus and auxiliary CT burden constraints apply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication Platform\u003c\/td\u003e\n\u003ctd\u003eREB103 Busbar Protection Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Function\u003c\/td\u003e\n\u003ctd\u003eReal-time analog current comparison\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIngress Protection\u003c\/td\u003e\n\u003ctd\u003eIP54 rated housing enclosure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Interfaces\u003c\/td\u003e\n\u003ctd\u003eVia host REB103 system (SPA and IEC 60870-5-103 protocols)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control and Drive Architecture\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Bus Communication Velocity\u003c\/strong\u003e The hardware interfaces directly with the analog measurement backplane of the REB103 protection chassis. This hardwired connection ensures instantaneous parallel signal velocity, routing current differential data frames to the tripping logic circuitry without processing or software stack translation delays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfinet \/ EtherNet\/IP Deterministic Networks\u003c\/strong\u003e When integrated within the host protection system, the device passes sequence-of-events and diagnostic metrics to deterministic station networks. This data routing isolates sub-transmission automation layers, ensuring that critical 220 kV to 500 kV fault processing remains unhindered by background SCADA communications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI\/O Density Scaling and Zone Mapping\u003c\/strong\u003e The 8.5 kg module contains high-precision comparison circuitry designed to analyze current balances across multiple high-voltage busbar segments simultaneously. This design permits multi-zone scaling inside centralized protection panels, optimizing physical cabinet space without causing channel cross-talk or thermal crowding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirmware Flash Compatibility and Linear Interlocking\u003c\/strong\u003e The analog comparison trip thresholds map directly onto the protection parameters defined by the system firmware flash version. This strict hardware-to-software baseline correlation maintains linear fault discrimination curves during dynamic substation switching sequences.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the passive analog comparison circuit achieve a low-latency response time?\u003c\/p\u003e\n\u003cp\u003eA: The RK638007-BA relies on hardwired analog circuitry to compare instantaneous current inputs from matching current transformers (CTs). Because it bypasses digital microprocessing queues for the primary measurement verification, it outputs a near-zero latency differential signal straight to the trip relays.\u003c\/p\u003e\n\u003cp\u003eQ: What are the protection boundaries for the host system when utilizing the integrated protocols?\u003c\/p\u003e\n\u003cp\u003eA: The RLHE 103 unit interfaces natively through the REB103 relay framework, utilizing SPA or IEC 60870-5-103 communication links. These links map diagnostic variables and lock-out states to the main substation SCADA without introducing external vulnerabilities into the hardware processing loops.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":45090719858803,"sku":"RK638007-BA","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-05-21_09-31-40.png?v=1781143649","url":"https:\/\/www.dcssupplier.com\/products\/abb-rk638007-ba-comparator-unit","provider":"DcsSupplier Limited","version":"1.0","type":"link"}