{"product_id":"abb-ret316-4-hesg448750m2-modures®-series-differential-protection-relay","title":"ABB RET316*4 | HESG448750M2 | MODURES® Series | Differential Protection Relay","description":"\u003ch3\u003eProduct Description:\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eABB RET316*4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003eHESG448750M2\u003c\/strong\u003e) is an advanced\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eDifferential Protection Relay\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003especifically designed for high-performance protection of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ethree-phase transformers\u003c\/strong\u003e,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003egenerators\u003c\/strong\u003e, and\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emotors\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ein power systems. As part of the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eMODURES®\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eseries, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRET316*4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erelay provides a modular, flexible, and highly reliable protection solution. It is capable of detecting internal short circuits, ground faults, and other electrical abnormalities that could lead to catastrophic equipment failure. This relay is a key component of ABB's\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRelion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003elegacy protection family and integrates numerical protection algorithms to ensure precise and rapid fault detection.\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRET316*4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoperates on the principle of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eNumerical Differential Protection\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eby continuously comparing the currents entering and leaving the protected zone. If a significant difference is detected, the relay immediately triggers an alarm or a trip action, preventing damage to critical equipment.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDifferential Protection (87T\/87G)\u003c\/strong\u003e: Provides fast and reliable protection against internal faults in transformers, generators, and motors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRestricted Earth Fault (87N\/64R)\u003c\/strong\u003e: Detects ground faults close to the neutral point, offering high-sensitivity protection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOvercurrent Protection (50\/51)\u003c\/strong\u003e: Includes backup protection for phase and earth faults to ensure continuous safety during fault conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Overload (49)\u003c\/strong\u003e: Monitors transformer temperature and calculates the \"thermal image\" to protect the insulation from overheating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOverexcitation (24)\u003c\/strong\u003e: Prevents transformer core saturation by detecting excessive excitation levels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification Details\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 Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eRET316*4 \/ HESG448750M2\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMODURES® \/ Relion (Legacy)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrimary Function\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThree-phase Differential Protection (87T\/87G)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 to 9 Current Inputs (for multi-winding support)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 Hz \/ 60 Hz (Selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNominal Current (In)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1A or 5A (Configurable via CT inputs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAuxiliary Power Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e36–312 VDC or 24–125 VDC (depending on PSU configuration)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication Interfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLON bus, SPA-bus, IEC 60870-5-103\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBinary I\/O\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMultiple programmable digital inputs and output relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Protection Functions:\u003c\/h3\u003e\n\u003ch4\u003e1.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTransformer Differential (87T)\u003c\/strong\u003e:\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRET316*4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eutilizes\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eharmonic restraint\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(2nd and 5th harmonics) to prevent nuisance tripping during transformer inrush events, providing high-speed protection for transformers and other critical equipment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e2.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRestricted Earth Fault (87N\/64R)\u003c\/strong\u003e:\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThis function offers\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehigh-sensitivity detection\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor earth faults, particularly useful in scenarios where ground faults occur near the neutral point of a transformer.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e3.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eOvercurrent Protection (50\/51)\u003c\/strong\u003e:\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThe relay provides\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebackup protection\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor both phase and earth faults, adding an extra layer of safety against electrical failures and abnormal current flow.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e4.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eThermal Overload Protection (49)\u003c\/strong\u003e:\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRET316*4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecalculates the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ethermal image\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eof the transformer, ensuring that the insulation remains protected from potential damage due to overheating, based on the load current.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e5.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eOverexcitation (24)\u003c\/strong\u003e:\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThis protection feature is specifically designed to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eprevent transformer core saturation\u003c\/strong\u003e, protecting transformers from overexcitement during abnormal operational conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Features:\u003c\/h3\u003e\n\u003ch4\u003e1.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eModular Design\u003c\/strong\u003e:\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eMODURES®\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eplatform is known for its flexibility and modularity. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eHESG448750M2\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eassembly includes the processing unit, analog input cards (CT\/VT), and power supply module housed within a 19-inch subrack or compact case. This modularity simplifies maintenance and system upgrades.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e2.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAmplitude and Vector Group Compensation\u003c\/strong\u003e:\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eUnlike traditional analog relays, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRET316*4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoffers\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esoftware-based compensation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003etransformer vector groups\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(such as Dyn11) and\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCT ratio mismatches\u003c\/strong\u003e, eliminating the need for additional interposing CTs in most applications, thus reducing system complexity and cost.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e3.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSelf-Monitoring System\u003c\/strong\u003e:\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThe relay continuously supervises its own operation. If an internal fault (e.g., in the CPU, memory, or DC supply) is detected, it signals an alarm and deactivates the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e\"Ready\" contact\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto avoid a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efail-to-trip\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003escenario, ensuring reliable protection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMaintenance and Diagnostics:\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEvent Recorder\u003c\/strong\u003e: Stores up to several hundred events with a 1 ms time stamp, enabling post-event analysis.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDisturbance Recorder\u003c\/strong\u003e: Captures analog waveforms during faults, allowing in-depth analysis through ABB’s\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCAP 316\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eor\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePCM600\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esoftware tools.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHuman-Machine Interface (HMI)\u003c\/strong\u003e: Features a built-in display and keypad for local setup adjustments and status monitoring, simplifying operation and diagnostics.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLegacy Status and Replacement:\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRET316*4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ehas largely been replaced by the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eABB RET670 series\u003c\/strong\u003e, which offers enhanced features and capabilities. When maintaining older\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRET316\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eunits, ensure periodic checks on backup batteries and electrolytic capacitors (typically every\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e5-8 years\u003c\/strong\u003e) to maintain system reliability.\u003c\/p\u003e\n\u003ch3\u003eApplication Scenarios:\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRET316*4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis primarily used for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003edifferential protection\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ein critical power system components like\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003etransformers\u003c\/strong\u003e,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003egenerators\u003c\/strong\u003e, and\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emotors\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ein high-voltage substations. Its high-speed fault detection and protection capabilities make it ideal for use in industries where system uptime and equipment longevity are essential, such as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eutilities\u003c\/strong\u003e,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003epower generation\u003c\/strong\u003e, and\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eheavy industrial manufacturing\u003c\/strong\u003e.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":44089851445347,"sku":"RET316*4 HESG448750M2","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/2775\/3315\/files\/HESG448750M2.jpg?v=1774855230","url":"https:\/\/precisemodule.com\/products\/abb-ret316-4-hesg448750m2-modures%c2%ae-series-differential-protection-relay","provider":"Precise Module Ltd.","version":"1.0","type":"link"}