{"product_id":"abb-ret521-1mrk002239-ba-protection-ied","title":"ABB RET521 1MRK002239-BA Protection IED","description":"\u003cp\u003eThe \u003cstrong\u003eABB RET521 (1MRK002239-BA)\u003c\/strong\u003e serves as the primary \u003cstrong\u003eRET521\u003c\/strong\u003e Protection IED utilized to execute multifunctional protection, control, and measurement tasks across medium-voltage networks and AC motor feeder circuits.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRET521\u003c\/strong\u003e: Base designation for the ABB multifunctional medium-voltage protection and control platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1MRK002239-BA\u003c\/strong\u003e: Unique ordering part identifier cataloging the hardware build, pre-made standard configuration, and factory default firmware parameters.\u003c\/li\u003e\n\u003c\/ul\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\u003eRET521 (1MRK002239-BA)\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 \/ Finland\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 2.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard compact enclosure profile\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-10 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\u003eMax 20 W \/ 30 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConventional CTs\/VTs or Current\/Voltage Sensors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFlush panel or subrack mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSystem Integration and Control Architecture\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Bus Communication Velocity\u003c\/strong\u003e: Executes deterministic internal data routing across internal microprocessor buses to maintain fast protection trip calculations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfinet \/ EtherNet\/IP Deterministic Networks\u003c\/strong\u003e: Supports standardized communication protocols for station bus integration and peer-to-peer data exchange.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI\/O Density Scaling\u003c\/strong\u003e: Integrates configurable binary and analog input\/output channels to support circuit breaker control and supervision across diverse grounding systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirmware Flash Compatibility\u003c\/strong\u003e: Permits software parameter configuration and firmware updates via front communication interfaces without altering physical panel wiring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the internal power supply or I\/O modules be hot-swapped while the panel is energized?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No, module replacement requires de-energizing the unit and isolating connected transformer secondary circuits to prevent hazard states.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What grounding network topologies are supported by the IED?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The unit supports isolated, resonant earthed, solidly earthed, and resistively earthed network configurations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What primary equipment does the unit protect?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: It serves as primary protection for incoming and outgoing feeders, large three-phase AC motors, and backup protection for power transformers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnsure the relay case earth terminal is connected directly to the switchgear ground bus using a low-impedance conductor.\u003c\/li\u003e\n\u003cli\u003eVerify that auxiliary supply voltage levels match the rated input limits prior to initial energization.\u003c\/li\u003e\n\u003cli\u003eTerminate all sensor and instrument transformer secondary leads securely to the terminal blocks with proper shielding against electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003eMaintain clear vertical airflow clearances around the enclosure to ensure proper thermal dissipation.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default 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