{"product_id":"ge-multilin-l90-line-current-differential-protection-system","title":"GE Multilin L90 Line Current Differential Protection System","description":"\u003ch2\u003eGE Multilin L90 Line Current Differential Protection System\u003c\/h2\u003e\n\u003cp\u003eConfigured for high-speed line current differential protection in GE Universal Relay (UR) platforms, the \u003cstrong\u003eGE Multilin L90\u003c\/strong\u003e (\u003cstrong\u003eL90\u003c\/strong\u003e Line Current Differential Protection System) provides direct physical\/electrical execution. The relay performs synchronized current vector exchange, protection logic processing, control output operation, and substation communication functions for transmission and sub-transmission line applications.\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\u003eGE Multilin L90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE Multilin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eCanada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e19-inch rack mount chassis, 4RU height; 1\/2 rack or full rack width options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Current Inputs\u003c\/td\u003e\n\u003ctd\u003e1 A or 5 A nominal CT inputs; burden less than 0.2 VA at nominal current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Voltage Inputs\u003c\/td\u003e\n\u003ctd\u003e50 V to 240 V nominal phase-to-neutral; burden less than 0.15 VA at 120 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e50 Hz or 60 Hz nominal; operating range 20 Hz to 65 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Power Supply\u003c\/td\u003e\n\u003ctd\u003e88 VDC to 300 VDC or 88 VAC to 265 VAC; optional 24 VDC to 48 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital Inputs\u003c\/td\u003e\n\u003ctd\u003eOpto-isolated inputs with programmable voltage range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Relays\u003c\/td\u003e\n\u003ctd\u003eForm-A and Form-C dry contacts; fast solid-state output options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eA\/D Conversion\u003c\/td\u003e\n\u003ctd\u003e64 samples per cycle, 16-bit resolution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interfaces\u003c\/td\u003e\n\u003ctd\u003eDirect fiber, C37.94, G.703, RS422, Ethernet, IEC 61850, DNP3, Modbus TCP\/RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Industrial Communication and Control Interfaces\u003c\/h3\u003e\n\u003cp\u003eThe GE Multilin L90 supports deterministic network communication through Ethernet and serial interfaces for protection data exchange and substation automation. The relay supports IEC 61850 Edition 1 and Edition 2, GOOSE messaging, MMS services, DNP3, Modbus TCP\/RTU, and IEC 60870-5-104 protocols.\u003c\/p\u003e\n\u003cp\u003eThe Universal Relay platform architecture supports backplane bus communication velocity licensing, Profinet \/ EtherNet-IP deterministic network concepts, I\/O density scaling, and firmware flash compatibility management across compatible hardware configurations. The L90 uses synchronized sampling and communication channel compensation to maintain differential protection calculations during line fault conditions.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the L90 support multi-terminal line protection configurations?\u003cbr\u003eA: Yes. The L90 supports two-terminal and three-terminal line configurations with current differential protection channel communication between relay locations.\u003c\/p\u003e\n\u003cp\u003eQ: What communication media are available for 87L current differential channels?\u003cbr\u003eA: Supported media include direct fiber optic connections, C37.94, G.703, and RS422 interfaces depending on the installed communication module configuration.\u003c\/p\u003e\n\u003cp\u003eQ: Can the L90 execute breaker control functions without an external PLC?\u003cbr\u003eA: Yes. The relay includes FlexLogic programmable logic for internal control sequences, breaker failure logic, synchrocheck, and autoreclosing functions.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the L90 in a suitable protective relay panel or rack enclosure with correct mechanical support for the selected rack configuration. Maintain separation between CT\/VT wiring, control wiring, and communication cables to reduce electrical interference.\u003c\/p\u003e\n\u003cp\u003eTerminate current transformer circuits according to protection engineering practices, maintaining correct polarity and phase identification. Use shielded communication cables where applicable and connect cable shields according to site grounding standards.\u003c\/p\u003e\n\u003cp\u003eVerify fiber optic connections, Ethernet port assignments, time synchronization inputs, and communication channel settings before commissioning. Confirm relay firmware compatibility with the installed hardware modules before performing configuration updates.\u003c\/p\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":44503141351512,"sku":"L90","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/L90-W00-HQH-F8L-H6A-L6C-NXX-SXX-UXX-W7D3.jpg?v=1785920813","url":"https:\/\/www.industriaxplc.com\/ar\/products\/ge-multilin-l90-line-current-differential-protection-system","provider":"IndustriaX Limited","version":"1.0","type":"link"}