{"product_id":"abb-spaj-110-c-aa-spaj-series-earth-fault-relay","title":"ABB SPAJ 110 C-AA SPAJ Series Earth-Fault Relay","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\nProcessing secondary line currents to secure distribution assets, the \u003cstrong\u003eABB SPAJ 110 C-AA\u003c\/strong\u003e operates as a micro-processor based sensitive earth-fault secondary protection relay. This intelligent electronic device tracks residual neutral currents via current transformer lines to safeguard radial feeders, power transformers, and heavy industrial motors against high-impedance insulation failure and phase-to-ground faults. Operating as an autonomous or networked component within substation switchgear arrays, the \u003cstrong\u003eSPAJ 110 C-AA\u003c\/strong\u003e integrates an independent dual-stage protection structure, non-volatile operational registers, and continuous auto-diagnosis routines that report system metrics via an asynchronous serial link to maximize grid uptime.\n\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.2rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli style=\"margin-bottom: 0.25rem;\"\u003e\n\u003cstrong\u003eDual-Stage Earth-Fault Assembly:\u003c\/strong\u003e Features an adjustable sensitive low-set residual current stage Io\u0026gt; and a high-set stage Io\u0026gt;\u0026gt; for flexible definitive or inverse time-current grading coordination.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.25rem;\"\u003e\n\u003cstrong\u003eConfigurable Time Characteristics:\u003c\/strong\u003e Employs four standardized international IDMT curve profiles according to IEC 60255 and BS 142 structural specifications, alongside unique engineering RI and RXIDG inverse time matrices.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.25rem;\"\u003e\n\u003cstrong\u003eDedicated Core Tracking Sub-module:\u003c\/strong\u003e Incorporates the plug-in SPCJ 1C8 measuring card, delivering precise analog-to-digital current loop conversion and stable trip settings.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.25rem;\"\u003e\n\u003cstrong\u003eCircuit-Breaker Failure Protection:\u003c\/strong\u003e Includes an internal CBFP timing delay mechanism that automatically commands secondary upstream isolation loops if the primary local circuit breaker fails to drop.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.25rem;\"\u003e\n\u003cstrong\u003eNon-Volatile System Logging:\u003c\/strong\u003e Registers peak zero-sequence current amplitudes and chronological operation state indicators for the five most recent structural fault events.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.25rem;\"\u003e\n\u003cstrong\u003eContinuous Auto-Diagnosis Watchdog:\u003c\/strong\u003e Runs an integrated self-supervision routine tracking micro-controller health, internal RAM\/ROM validation blocks, and auxiliary voltage tolerances.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.2rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli style=\"margin-bottom: 0.25rem;\"\u003eSensitive earth-fault and neutral current tracking on radial medium-voltage utility distribution feeders.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.25rem;\"\u003eResidual current monitoring inside isolated-neutral or high-resistance earthed electrical substation networks.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.25rem;\"\u003eZero-sequence ground protection loop for industrial asynchronous motors, generators, and distribution transformers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #1a365d; text-align: left;\"\u003e\n        \u003cth style=\"padding: 0.5rem; font-weight: bold; color: #1a365d;\"\u003eTechnical Parameter Category\u003c\/th\u003e\n        \u003cth style=\"padding: 0.5rem; font-weight: bold; color: #1a365d;\"\u003eEngineered Specification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eABB\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eModel Designation\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eSPAJ 110 C-AA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eProduct ID Reference\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eSPAJ 110 C-AA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eCore Sub-module Included\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eSPCJ 1C8 (Sensitive Earth-Fault Module)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003ePart Classification\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eOriginal New Part\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eRated Input Frequency (fn)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e50 Hz (AA Configuration)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eAuxiliary Operating Voltage (Uaux)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e80...265 V DC or AC (AA Configuration)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eAlternative Voltage Factory Range\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e18...80 V DC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eRated Measuring Neutral Current (In)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e1 A or 5 A selectable via hardware terminals\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eLow-Set Earth-Fault Range (Io\u0026gt;)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e0.1...0.8 x In (Definite-time or IDMT options)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eHigh-Set Earth-Fault Range (Io\u0026gt;\u0026gt;)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e0.1...10.0 x In or infinity (Definite-time)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eData Communication Interface\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eRear panel plastic or glass fiber-optic serial port using SPA bus protocol\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eEnclosure Sealing Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eIP54 flush panel-mounted format\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eCustoms Tariff Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e85364900\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eFinland (FI)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eProduct Net Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e2.850 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eGross Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e2.850 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eMinimum Order Quantity\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e1.000 piece\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #1a365d; text-align: left;\"\u003e\n        \u003cth style=\"padding: 0.5rem; font-weight: bold; color: #1a365d;\"\u003eTerminal Allocation Index\u003c\/th\u003e\n        \u003cth style=\"padding: 0.5rem; font-weight: bold; color: #1a365d;\"\u003eCircuit Line Function \/ Signal Mapping\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e25 - 27\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eResidual Earth-Fault Current Input Io (1 A configuration mapping)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e25 - 26\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eResidual Earth-Fault Current Input Io (5 A configuration mapping)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e10 - 11\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eExternal Binary Control Interface (Optically Isolated Input Channel)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e61 - 62\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eAuxiliary System Supply Power Inputs (Uaux)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e65 - 66\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eInternal Relay Failure (IRF) Watchdog Output Contact Loop\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e68 - 69\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eMain Circuit Breaker Primary Heavy Tripping Output Relay Matrix\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e74 - 75\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eSecondary \/ Backup Tripping Contact Output Relay Matrix\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e70 - 71 - 72\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eSignalling Output Contact Array (Configurable Start \/ Trip Alarms)\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch3\u003eAlternative Models \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\nThe SPAJ 110 C-AA is built using standard dim100 sub-rack dimensions, sharing identical technical installation profiles with other devices in the SPAJ protection range. The core internal computing card is designated as model SPCJ 1C8, which can be extracted during service parameters verification. When integrating this hardware configuration as a drop-in update for legacy standalone earth-fault equipment, check master bus configuration registers and verify that local network addresses match variables V101 and V102 to secure stable host polling.\n\u003c\/p\u003e\n\n\u003ch3\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\nIn heavy industrial operations featuring constant motor starting curves or significant harmonic distribution profiles, pay close attention to the low-set Io\u0026gt; filter states. If localized ambient enclosures hover near 55 Celsius, continuous high burden steps may compromise internal chip timing loops. When permanent processing issues develop within the internal microcontroller loops, the system drops trip capability and illuminates the red IRF LED indicator on the front fascia, displaying explicit green codes such as 51 or 52 on the front digital indicator window.\n\u003c\/p\u003e\n\n\u003ch3\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\nEnsure that the central copper ground terminal block located at the back of the device chassis links back to the main switchgear earth rail with zero voltage offset. Inductive noise or floating ground potentials on the current transformer lines will cause erratic low-set ground fault starts when high primary current develops. For field validation routines, always utilize certified short-circuit bridging bars to isolate the external current transformer circuits prior to breaking open terminal blocks or pulling out the live internal processing module.\n\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0; font-weight: bold;\"\u003eCRITICAL WARNING\u003c\/p\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0.5rem 0 0 0;\"\u003eNever extract the plug-in active processing sub-module from its casing structure without verifying that all connected current transformer measuring secondary loops are completely closed or shorted out. Open CT line loops generate severe electrical high-voltage arc tracking, risking permanent hardware destruction and serious personal injury.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n  \u003cp style=\"color: #2d3748; margin: 0;\"\u003eConfirm that the panel face cutout fits standard dim100 spacing variables prior to inserting the outer protective metal housing case.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n  \u003cp style=\"color: #2d3748; margin: 0;\"\u003eTighten the side flush-mounting bracket screws in an alternating pattern to secure a balanced seal against the IP54 faceplate gasket elements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n  \u003cp style=\"color: #2b6cb0; margin: 0;\"\u003eRun a minimum 2.5 mm2 yellow-green copper earth lead from the rear M5 grounding terminal stud back to the main station protective ground plane.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompliance and Certifications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.2rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003eCE Marking according to the European Union Directive for Electromagnetic Compatibility (EMC)\u003c\/li\u003e\n  \u003cli\u003eIEC 60255 Protection Relays Structural, Insulation, and Electrical Safety Verification Parameters\u003c\/li\u003e\n  \u003cli\u003eBS 142 Substation Secondary System Electrical Control and Protection Standards\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":52668587802987,"sku":"SPAJ110 C-AA","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/abb-spaj110-c-aa-earth-fault-relay-h0wfqrxeqet_91305889-64a6-40cf-abca-9e9abe724fd3.jpg?v=1765533048","url":"https:\/\/www.plcprotech.com\/products\/abb-spaj-110-c-aa-spaj-series-earth-fault-relay","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}