{"product_id":"ge-ur81h-multilin-ur-series-ct-vt-process-bus-module","title":"GE UR81H Multilin UR Series CT\/VT Process Bus Module","description":"\u003ch2\u003eGE UR81H Multilin UR Series Process Bus Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGE UR81H\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eUR81H\u003c\/strong\u003e CT\/VT Process Bus Module, operates as a dedicated hardware component for the digitization of instrument transformer signals and their subsequent transmission via IEC 61850 process bus communication within Multilin UR Series universal relay platforms.\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\u003eUR81H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE Multilin UR Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard GE UR chassis form factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eDependent on host relay chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePerformance\u003c\/td\u003e\n\u003ctd\u003eDigitization of 24 CT\/VT analog channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication and Firmware Architecture\u003c\/h3\u003e\n\u003cp\u003eThe UR81H module facilitates the transition from conventional point-to-point wiring to digital substation architectures by providing high-speed digitization of up to 24 analog CT\/VT channels. It interfaces directly with the host UR chassis backplane, allowing for synchronized data transfer that satisfies the strict timing requirements of IEC 61850 sample values (SV). The module firmware manages the filtering and scaling of raw analog inputs, ensuring that digitized output streams maintain the amplitude and phase accuracy required for complex protection logic execution. Its internal architecture supports seamless integration into redundant communication networks, facilitating high availability in utility applications where fault-tolerant data paths are mandatory.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Is the UR81H compatible with standard copper-wired instrument transformers?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the module accepts analog inputs from conventional CTs and VTs, which it then conditions and converts into digital packets for process bus communication, effectively acting as an interface between legacy sensors and modern digital relays.\u003c\/p\u003e\n\u003cp\u003eQ: Can the UR81H be inserted into an energized UR chassis?\u003c\/p\u003e\n\u003cp\u003eA: No, strict field installation guidelines mandate that chassis auxiliary power must be isolated prior to module installation or removal to prevent electrical disturbances on the internal backplane bus.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eWhen installing the UR81H, ensure the host relay chassis is de-energized. Slide the module into the designated slot on the UR chassis, ensuring the rear connector is aligned correctly with the backplane bus. Secure the module using the provided faceplate captive screws to ensure a proper ground connection for EMI shielding. Terminate all analog CT\/VT wiring at the terminal board as specified in the project wiring diagrams, and ensure that all shields are grounded to the designated cabinet common to mitigate noise pickup. Once installed, verify the module status LEDs and configure the relay software to recognize the UR81H input mapping before applying primary current to the CT circuits.\u003c\/p\u003e","brand":"GE Fanuc","offers":[{"title":"Default Title","offer_id":43865422397539,"sku":"UR81H","price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/71_42f43d52-0a8d-41ac-85c2-d5d27c594415.jpg?v=1764556572","url":"https:\/\/www.autocontrolglobal.com\/products\/ge-ur81h-multilin-ur-series-ct-vt-process-bus-module","provider":"AutoControl Global","version":"1.0","type":"link"}