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        UR7KH

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        The GE UR7KH high-speed communication module is designed to facilitate secure point-to-point data exchange in power system protection networks and is specifically designed to address long-distance guided auxiliary protection schemes.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
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        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for UR7KH

        • Manufacturer:
          General Electric
        • Part Number:
          UR7KH
        • Product Family:
          GE Multilin
        • Module Type:
          Fiber Optic Communication Interface
        • Number of Channels:
          2 Channels (Dual-channel)
        • Optical Interface:
          1300 nm Single-mode LASER
        • Connector Type:
          ST Connector (standard for UR7KH)
        • Data Rate:
          High-speed peer-to-peer (up to 56/64 kbps or 512 kbps/2 Mbps depending on relay firmware)
        • Protocol Support:
          IEC 61850, R-GOOSE, Modbus, DNP3, and Direct I/O
        • Weight:
          0.72 kg
        • Estimated shipping dimensions:
          4x21x17.2cm
        • Tariff Code:
          8537101190
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen,Fujian,China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Use Cases Diagnostics & Protection Firmware & Updates

        Features:

        • Fiber-optic communication interface for the GE Multilin Universal Relay (UR) platform
        • Dual-channel 1300 nm single-mode LASER technology with peer-to-peer data exchange capability
        • Designed for integration with L90 Line Differential and POTT protection schemes
        The UR7KH serves as the high-speed fiber-optic communication module in the UR series relay platform, enabling secure data transmission between remote protection terminals. It continuously converts electrical signals to optical signals (1300 nm single-mode LASER) and transmits critical protection data with minimal latency and high immunity to electromagnetic interference. Seamless communication is standard with the UR7KH, ensuring that relays at distant locations can exchange status information instantaneously. The UR7KH has made improvements in signal integrity over traditional copper-based signaling, incorporating long-distance transmission capability within the protection network.

        The UR7KH provides essential communication functions common to the entire protection scheme, and is a critical component of the pilot-aided protection path, directly affecting the proper, normal operation of the overall relay system. One UR7KH module is required per relay for single-channel applications, with dual-channel configuration available for enhanced reliability. The UR7KH occupies a dedicated slot in the UR-series chassis and is designed for flexible integration across various UR relay models.

        For critical protection applications, the UR7KH supports advanced protocols including IEC 61850 and R-GOOSE. In addition to standard peer-to-peer communication, the UR7KH enables deterministic messaging for automated switching sequences. The UR7KH communication system continually monitors signal quality and link health. If the system detects degradation in the primary communication path, it can automatically transfer to the secondary channel and generate appropriate system events for operator awareness.

        The UR7KH General Electric Fiber Optic Communication Interface Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        General Electric UR7KH Fiber Optic Communication Interface Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        General Electric UR7KH Fiber Optic Communication Interface Module Specs

        General

        • Manufacturer General Electric
        • Model UR7KH
        • Condition New Original ready stock
        • Product Family URRHH,UR9UH,UR8LH,UR6CH
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • Long-Distance Pilot Protection: The UR7KH is used to connect relays at two ends of a transmission line. It facilitates Permissive Overreaching Transfer Tripping (POTT) and Directional Comparison Blocking (DCB) schemes across distances where multi-mode fiber cannot reach.
        • Substation-to-Substation Interlocking: By utilizing the UR7KH, utilities can share "logic states" between distant substations. This UR7KH application solves the problem of manual coordination during complex switching sequences, preventing accidental energization of grounded lines.
        • Digital Transformation: It serves as a bridge for legacy systems moving toward a digital architecture, allowing existing UR-series relays to communicate via high-speed fiber links without replacing the entire protection suite.
        • Channel Health Monitoring: The UR7KH continuously tracks the signal strength and "bit error rate" of the fiber link. If a fiber cable is damaged or the signal degrades, the UR7KH triggers an alarm, allowing operators to switch to backup protection before a total failure occurs.
        • Data Integrity (CRC): To prevent false tripping caused by data corruption, the UR7KH employs Cyclic Redundancy Checks (CRC). This ensures that only valid, uncorrupted protection commands are executed by the relay.
        • Loopback Testing: The UR7KH supports internal and external loopback modes, which are essential for commissioning. This feature allows technicians to verify the communication path without needing a second technician at the remote site.
        • Firmware Synchronization: The UR7KH firmware is typically managed as part of the overall UR-series firmware package. It is critical that both ends of a communication link (both UR7KH modules) are running compatible firmware versions to avoid synchronization errors.
        • EnerVista UR Setup: Updates and configuration for the UR7KH are performed via the EnerVista software. This interface allows users to set the communication baud rate (e.g., 64 kbps or 2 Mbps) and map specific "Direct I/O" bits to the UR7KH channels.
        • Security Patches: Newer firmware updates for the UR7KH often include enhancements for NERC/CIP compliance, such as improved encryption for data in transit and better logging of communication-related events.
        Description
        The General Electric UR7KH is a specialized high-speed communication module engineered for the GE Multilin Universal Relay (UR) platform. This UR7KH dual-channel 1300 nm single-mode LASER module is designed to facilitate secure, peer-to-peer data exchange across power system protection networks. By utilizing the UR7KH, utilities can establish reliable fiber-optic links between remote terminals, ensuring that critical protection signals are transmitted with minimal latency and high electromagnetic interference immunity.

        This UR7KH module is specifically designed to handle the challenges of long-distance pilot-aided protection schemes, such as Line Differential (L90) or Permissive Overreaching Transfer Tripping (POTT). In a real-world application scenario, the UR7KH solves the problem of signal degradation and ground potential rise common in traditional copper-based signaling. For instance, in a high-voltage transmission line spanning several kilometers, the UR7KH enables two relays to "talk" to each other instantly over fiber, allowing the system to isolate a fault in milliseconds and preventing widespread grid instability.

        The modular architecture of the UR7KH ensures it can be integrated into various UR-series chassis to meet evolving grid requirements. Beyond simple data transmission, the UR7KH supports advanced protocols like IEC 61850 and R-GOOSE, which are essential for modern digital substations. By deploying the UR7KH, operators address the need for deterministic communication in automated switching sequences, effectively solving the complexity of manual interlocking and reducing the risk of human error during high-stress contingency events.
        Alternative Names
        URRHH UR9UH UR8LH UR6CH UR4DH
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What is the GE UR7KH module?
        The UR7KH is a specialized high-speed communication module designed for the GE Multilin Universal Relay platform. It is a dual-channel 1300 nm single-mode laser module that enables secure, peer-to-peer data exchange across power system protection networks using fiber-optic communication.
        What challenges does the UR7KH solve compared to traditional communication methods?
        The UR7KH overcomes issues such as signal degradation and ground potential rise that are common in copper-based communication systems. By using fiber-optic technology, it provides stable and high-speed communication even over long transmission distances.
        In which applications is the UR7KH commonly used?
        The UR7KH is widely applied in pilot-aided protection schemes such as Line Differential protection and Permissive Overreaching Transfer Tripping (POTT). In these scenarios, it enables real-time communication between relays to quickly detect and isolate faults on transmission lines.

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