{"product_id":"abb-spau-330-c1-aa-combined-overcurrent-and-earth-fault-protection-relay","title":"ABB SPAU 330 C1-AA Combined Overcurrent and Earth-Fault Protection Relay","description":"\u003ch2\u003eABB SPAU 330 C1-AA Combined Overcurrent and Earth-Fault Protection Relay\u003c\/h2\u003e\n\u003cp\u003eConfigured for selective phase overcurrent and earth-fault protection in radial distribution networks, the \u003cstrong\u003eABB SPAU 330 C1-AA\u003c\/strong\u003e (\u003cstrong\u003eSPAU 330\u003c\/strong\u003e combined protection relay) processes current inputs and executes defined protection stages. It supports local indication, parameter setting, trip signaling, and SPA bus communication.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003eSPAU 330 C1-AA\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\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003eSPACOM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice Type\u003c\/td\u003e\n\u003ctd\u003eCombined Overcurrent and Earth-Fault Protection Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Phase Current\u003c\/td\u003e\n\u003ctd\u003e1 A or 5 A, selected through terminal connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Residual Current\u003c\/td\u003e\n\u003ctd\u003e1 A or 5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow-Set Overcurrent\u003c\/td\u003e\n\u003ctd\u003e3I\u0026gt; stage with definite-time or inverse-time characteristics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh-Set Overcurrent\u003c\/td\u003e\n\u003ctd\u003e3I\u0026gt;\u0026gt; stage with definite-time characteristics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow-Set Earth-Fault\u003c\/td\u003e\n\u003ctd\u003eI0\u0026gt; stage with definite-time or inverse-time characteristics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh-Set Earth-Fault\u003c\/td\u003e\n\u003ctd\u003eI0\u0026gt;\u0026gt; stage with definite-time characteristics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLocal Display\u003c\/td\u003e\n\u003ctd\u003eDigital display for measured fault values, settings, and status codes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStatus Indication\u003c\/td\u003e\n\u003ctd\u003eLEDs for Start, Trip, and high-set operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLocal Controls\u003c\/td\u003e\n\u003ctd\u003eFront-panel push buttons for parameter setting and indication reset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication\u003c\/td\u003e\n\u003ctd\u003eSPA bus serial communication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Contacts\u003c\/td\u003e\n\u003ctd\u003eMultiple configurable trip and signaling relay contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFlush mounting with draw-out modular construction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuxiliary Supply\u003c\/td\u003e\n\u003ctd\u003eWide-range AC\/DC variants are available within the SPACOM product range; exact supply rating for this suffix is not specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eABB Industrial Protection and Control Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe relay processes phase and residual current signals through dedicated protection stages. Consequently, the low-set stages can apply definite-time or inverse-time operating characteristics, while the high-set stages use definite-time operation.\u003c\/p\u003e\n\u003cp\u003eThe front-panel interface provides local access to protection settings, measured fault values, and status information. In addition, the SPA bus interface supports serial communication with substation automation or SCADA equipment.\u003c\/p\u003e\n\u003cp\u003eThe draw-out construction separates the relay module from the fixed installation interface during service activities. Therefore, technicians can remove the relay for inspection or testing while maintaining the installed wiring arrangement.\u003c\/p\u003e\n\u003cp\u003eFor ABB control-system integration, the relay uses serial SPA bus communication rather than a Profinet or EtherNet\/IP interface. The supplied data does not specify a backplane bus, firmware version, or network communication velocity for this model.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Which current ratings does the SPAU 330 C1-AA accept?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The supplied data specifies 1 A or 5 A rated phase current and 1 A or 5 A rated residual current, selected through terminal connections.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What protection stages are available?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The relay provides low-set and high-set phase overcurrent stages, plus low-set and high-set earth-fault stages.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the relay support serial communication?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The supplied data identifies an SPA bus serial communication interface for substation automation and SCADA integration.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eVerify the relay model and terminal configuration against the approved protection scheme before installation.\u003c\/li\u003e\n\u003cli\u003eConfirm the selected 1 A or 5 A current-input configuration before connecting current transformer secondary circuits.\u003c\/li\u003e\n\u003cli\u003eMaintain correct CT polarity and phase identification throughout the current-input wiring.\u003c\/li\u003e\n\u003cli\u003eConnect earth-fault current measurement according to the protection-system wiring diagram.\u003c\/li\u003e\n\u003cli\u003eKeep current-transformer wiring separated from high-level switching and power conductors where practical.\u003c\/li\u003e\n\u003cli\u003eUse appropriate shield termination and grounding practices according to the substation wiring standard.\u003c\/li\u003e\n\u003cli\u003eVerify auxiliary supply voltage and polarity against the exact relay nameplate before energization.\u003c\/li\u003e\n\u003cli\u003eCheck trip and signaling contacts with the associated breaker-control circuit isolated or placed in the approved test condition.\u003c\/li\u003e\n\u003cli\u003eVerify protection settings before returning the relay to service.\u003c\/li\u003e\n\u003cli\u003eConfirm SPA bus wiring, addressing, and communication parameters before connecting the relay to the supervisory system.\u003c\/li\u003e\n\u003cli\u003eUse the draw-out mechanism according to the equipment procedure and avoid withdrawing the module while unsafe electrical conditions exist.\u003c\/li\u003e\n\u003cli\u003ePerform functional protection tests after installation and document the final settings and test results.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":44595682869336,"sku":"SPAU330 C1-AA","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/SPAU330-C1-AA-3_1200x1200_194f8353-5413-496c-b163-396eeb2e87c1.jpg?v=1786701924","url":"https:\/\/www.industriaxplc.com\/id\/products\/abb-spau-330-c1-aa-combined-overcurrent-and-earth-fault-protection-relay","provider":"IndustriaX Limited","version":"1.0","type":"link"}