{"product_id":"ge-multilin-ur-8hh-ur-series-ct-vt-module","title":"GE Multilin UR-8HH UR Series CT\/VT Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eGE Multilin UR-8HH\u003c\/strong\u003e is an engineering-grade analog input module designed for the UR Series protection relay platform. Engineered to process critical alternating current signals, the \u003cstrong\u003eUR-8HH\u003c\/strong\u003e function delivers a dedicated high-density \u003cstrong\u003eStandard 8CT\u003c\/strong\u003e configuration that manages eight current transformer inputs on a single slot card. It operates by interfacing directly with primary power system lines via external current transformers, providing comprehensive current measurement coverage across multiple zones or parallel three-phase circuits without requiring auxiliary intermediate CT components. By supporting versatile, software-configurable \u003cstrong\u003e1A \/ 5A ground current transformer\u003c\/strong\u003e settings, the module enables precision ground and phase fault monitoring across diverse low-voltage, medium-voltage, and high-voltage electrical substation operations. This module communicates directly via the system internal bus to feed raw high-speed digitized analog samples to the primary CPU processor, supporting advanced protection elements, true RMS metering, oscillography capture, and detailed current harmonic tracking.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProvides a compact high-density hardware architecture housing 8 Current Transformer (8CT) analog inputs within one full-height rack slot.\u003c\/li\u003e\n\u003cli\u003eFeatures dual-rated secondary compatibility supporting both 1 A and 5 A standard current transformer secondary loops.\u003c\/li\u003e\n\u003cli\u003eImplements direct high-speed analog-to-digital signal processing feeding synchronous samples into the relay internal calculation path.\u003c\/li\u003e\n\u003cli\u003eEliminates the need for external auxiliary current transformers through software-adjustable internal scale matching.\u003c\/li\u003e\n\u003cli\u003eIntegrates automatic mechanical shorting mechanisms across the external CT circuitry to guarantee technician safety during module withdrawal sequences.\u003c\/li\u003e\n\u003cli\u003eDesigned with distinctive blue identification labels and explicit safety warning markers to prevent system mismatching with legacy CPU architectures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-winding transformer differential protection configurations within utility substations.\u003c\/li\u003e\n\u003cli\u003eHigh-density current monitoring for ring-bus configurations and breaker-and-a-half power distribution schemes.\u003c\/li\u003e\n\u003cli\u003eComprehensive ground fault, neutral current tracking, and phase-overcurrent monitoring networks.\u003c\/li\u003e\n\u003cli\u003eRaw current waveform capture and high-resolution dynamic oscillography logging for power system diagnostic applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter Category\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\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGE Multilin (General Electric) \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCanada \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCT\/VT Input Module \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard 8 Current Transformers (8CT) \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupported CT Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 A and 5 A (Ground and Phase CT inputs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUR Series Hardware (CPU Codes 9E and higher) \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSampling Performance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e64 samples per power cycle for precise true RMS metering \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eData Diagnostics\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntegrates with internal 1024-event recorder and 64 oscillography records \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHardware Keying\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlue identification label matching with strict warning verification \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCircuit Safety Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAutomatic internal shorting of external CT secondary loops upon card extraction \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eConnections\/Interfaces\u003c\/h3\u003e\n\u003cp\u003eThe rear terminal layout of the \u003cstrong\u003eUR Series\u003c\/strong\u003e uses a structured three-character coordinate identification code assigned based on the selected slot housing the \u003cstrong\u003eUR-8HH\u003c\/strong\u003e card.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Transformer Screw Terminals:\u003c\/strong\u003e High-torque block headers equipped with dedicated underlying shorting bars designed to safely route continuous AC current loop configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated Channel Mapping:\u003c\/strong\u003e Pin configurations split across eight distinct current input channels, each accepting dual phase-polarity (Inlet \/ Outlet) instrumentation paths.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Precaution:\u003c\/strong\u003e Complete system control power must be physically disconnected and isolated from the main relay chassis prior to initiating any module insertion or withdrawal tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware Cohesiveness:\u003c\/strong\u003e The \u003cstrong\u003eUR-8HH\u003c\/strong\u003e belongs to the modern generation of UR components. It must only be paired with a CPU module designated with code 9E or higher. Mixing this card with legacy CPU modules (e.g., 9A, 9C, 9D) will result in a fatal DSP ERROR or HARDWARE MISMATCH state.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrostatic Grounding:\u003c\/strong\u003e Technicians are strictly required to employ fully grounded anti-static wrist straps during handling to guard internal circuit layers against ESD stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeating and Locking:\u003c\/strong\u003e Fully open the wide-angle hinge faceplate, align the card with the tracking slot, slide smoothly inside until the outer frame clears the lip, and then engage both top and bottom ejector\/inserter clips simultaneously to fully lock the internal backplane connection.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":52695419453803,"sku":"UR-8HH","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/ge-ur8hh-multilin-ur-control-module-5vtzbb34n34_8d3ee061-51f6-4080-9538-7f438d58b47a.jpg?v=1766135352","url":"https:\/\/www.plcprotech.com\/products\/ge-multilin-ur-8hh-ur-series-ct-vt-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}