{"product_id":"abb-dspad-32-375-stabilized-differential-relay","title":"ABB DSPAD\/32\/375 Stabilized Differential Relay","description":"\u003cp\u003eConfigured for high-speed fault clearance in power distribution and protection networks, the \u003cstrong\u003eABB DSPAD\/32\/375\u003c\/strong\u003e (\u003cstrong\u003eDSPAD\/32\u003c\/strong\u003e Stabilized Differential Relay) provides direct physical\/electrical execution. It evaluates differential current vectors across protected zone boundaries to identify phase and ground faults, triggering immediate trip signal execution to isolate faulty equipment without affecting normal power flow.\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\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDSPAD\/32\/375\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e936 mm x 605 mm x 596 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-25 deg C to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAuxiliary loop powered \/ Substation DC bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtection Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStabilized Differential Protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTrip Action\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh-speed trip relay output execution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eABB protection and control rack assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Substation Bus Communication \u0026amp; Logic Execution\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eDSPAD\/32\/375\u003c\/strong\u003e differential relay relies on high backplane bus communication velocity to transmit trip commands across local protection racks without deterministic execution delays. Onboard logic circuits maintain strict firmware flash compatibility across connected protection elements, preventing cross-talk or timing skews during current transformer (CT) saturation events. This ensures real-time evaluation of current vectors under severe throughput demands while maintaining high I\/O density scaling within integrated switchgear cabinets.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the stabilized differential function handle current transformer (CT) saturation during external faults?\u003c\/p\u003e\n\u003cp\u003eA: The internal differential algorithm incorporates restraint characteristics that increase the trip threshold during high external fault currents, preventing spurious trip execution caused by CT mismatch or saturation.\u003c\/p\u003e\n\u003cp\u003eQ: What are the backplane communication requirements when integrating into host protection racks?\u003c\/p\u003e\n\u003cp\u003eA: Ensure backplane bus communication velocity ratings and firmware flash compatibility levels match host rack bus specifications to prevent communication lockup or delayed trip signal processing.\u003c\/p\u003e\n\u003cp\u003eQ: Is external power required for trip circuit output activation?\u003c\/p\u003e\n\u003cp\u003eA: Yes, trip contacts require proper wiring to the substation DC auxiliary supply to energize the trip coils of downstream circuit breakers upon fault detection.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eDe-energize all CT secondary circuits and auxiliary control voltages before mounting or wiring the relay unit.\u003c\/li\u003e\n\u003cli\u003eShort-circuit all secondary CT inputs via shorting blocks prior to terminal disconnection to prevent high-voltage open-circuit hazards.\u003c\/li\u003e\n\u003cli\u003eMount the module chassis securely within the rack assembly, verifying that ground bonding straps connect directly to the main station earth grid.\u003c\/li\u003e\n\u003cli\u003eRoute low-level signal and current measurement leads in shielded, twisted-pair cables isolated from high-voltage AC\/DC power circuits.\u003c\/li\u003e\n\u003cli\u003eVerify terminal block screw tightness to maintain solid electrical contact and prevent thermal hot spots under continuous CT current loads.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53235437994293,"sku":"DSPAD\/32\/375","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/DSPAD02649_62678684-b033-4575-8235-85a7a2aaf075.png?v=1785468868","url":"https:\/\/www.5gplc.com\/products\/abb-dspad-32-375-stabilized-differential-relay","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}