{"product_id":"l30-ge-multilin-line-current-differential-relay-new-original-stock","title":"L30 GE Multilin Line Current Differential Relay | New \u0026 Original Stock","description":"\u003ch2\u003eGE Multilin L30 Universal Relay Series Line Current Differential Relay\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGE Multilin L30\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eL30\u003c\/strong\u003e Line Current Differential Protection Relay, operates as a dedicated hardware component for high-speed fault detection and secure phase-by-phase isolation within UR Series substation automation networks. The device samples current waveforms from local and remote line terminals, executing phase differential calculations through dedicated inter-relay communication channels to identify in-zone faults. It provides three-pole trip outputs, breaker failure mitigation, and automated reclosing sequences directly to high-voltage line switching apparatus.\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003eL30\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 \/ USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eSystem-dependent based on modular chassis choice\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard UR Series 19-inch rack-mount chassis footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eSystem-dependent based on modular power card configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interfaces\u003c\/td\u003e\n\u003ctd\u003eDirect fiber‑optic, RS422, G.703, IEEE C37.94\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Protocols\u003c\/td\u003e\n\u003ctd\u003eIEC 61850 Ed.1, Modbus TCP\/IP, DNP3, IEEE C37.118\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime Synchronization\u003c\/td\u003e\n\u003ctd\u003eGPS clock input or IRIG‑B signaling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAsymmetry Compensation\u003c\/td\u003e\n\u003ctd\u003eAutomatic channel delay balance up to 10 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Logs\u003c\/td\u003e\n\u003ctd\u003e1024 SOE events, 64 digital + 40 analog channel oscillography\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5% to 95% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProfinet \/ EtherNet\/IP Deterministic Networks and I\/O Density Scaling\u003c\/h3\u003e\n\u003cp\u003eThe L30 platform utilizes internal multi-processor communication slots to maintain high backplane bus communication velocity across modular processing segments. When scaling I\/O density using dense input\/output card arrays, the firmware coordinates parallel bit logic maps inside the FlexLogic programmable logic engine. The system maintains compliance with Modbus TCP\/IP and DNP3 protocols, processing digitized IEC 61850 process bus frames without timing lag. This configuration verifies that firmware flash compatibility is uniform across all plugged hardware modules, allowing the differential algorithms to execute within deterministic parameters during grid disturbances.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the L30 relay manage asymmetrical transmission delays across peer-to-peer telecom channels?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA: The relay includes automated channel asymmetry compensation circuitry.\u003c\/strong\u003e It recalculates ping‑pong transmission times via direct fiber, G.703, or IEEE C37.94 interfaces, correcting differential calculation paths for time deltas up to 10 ms to prevent false trips caused by network path variations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can modular I\/O cards be hot-swapped in the UR Series chassis while the L30 is monitoring an active line?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA: No.\u003c\/strong\u003e Removing modular hardware components while the chassis backplane power supply is running will interrupt the internal processing bus. This can result in localized hardware damage, memory fault generation, or unintended trip output contacts cycling to the field breaker circuits.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Panel Fastening:\u003c\/strong\u003e Secure the rack-mount housing into a standard 19-inch electronic instrumentation frame. Verify that all rear grounding studs align with copper earth bars using heavy‑gauge, low-impedance grounding straps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Transformer Termination:\u003c\/strong\u003e Route all secondary current transformer wiring through shorting‑type terminal blocks. Ensure that any CT circuits are completely short-circuited before disconnecting any terminal pin from the rear panel of the unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiber‑Optic Interface Radius:\u003c\/strong\u003e Maintain the manufacturer-specified minimum bending radius when routing direct fiber‑optic or IEEE C37.94 connection cables. Kinking or pulling communication lines can cause optical attenuation, leading to intermittent inter-relay data packet loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTime Sync Signal Verification:\u003c\/strong\u003e Hook up the external IRIG‑B or GPS reference signal to the dedicated auxiliary port. Cross-check the diagnostic register on the front panel LCD to ensure proper synchronization lock before placing the line differential loop into active status.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GE Fanuc","offers":[{"title":"Default Title","offer_id":43862948479075,"sku":"L30","price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/182_9579202f-378a-4cfc-8db7-e287299e328e.jpg?v=1764318221","url":"https:\/\/www.autocontrolglobal.com\/products\/l30-ge-multilin-line-current-differential-relay-new-original-stock","provider":"AutoControl Global","version":"1.0","type":"link"}