Product Details
Overview
The GE UR77H Inter-Relay Communications Module, part of the Multilin Universal Relay (UR) series, is engineered to enable high-speed fiber-optic communication between UR relays. It supports teleprotection, fast tripping, and coordinated control, ensuring secure and reliable data exchange in modern power system protection schemes.
Technical Specifications
-
Manufacturer: General Electric (GE)
-
Model: UR77H
-
Type: Inter-Relay Communications Module
-
Function: Relay-to-relay communications
-
Communication Standard: IEEE C37.94
-
Transmission Medium: Multimode fiber optic
-
Wavelength: 820 nm
-
Number of Channels: 2
-
Indicators: LED status indicators for diagnostics
-
Mounting Orientation: Horizontal installation within UR chassis
-
Dimensions: 280 mm × 115 mm × 45 mm
-
Weight: 0.6 kg
-
Country of Origin: USA
Key Features
-
Enables exchange of digital status and analog values between UR relays
-
Supports fast tripping and teleprotection applications
-
Noise-immune fiber-optic communication for reliable performance
-
Compact modular design for seamless integration into UR systems
-
Built for demanding industrial and utility environments
Applications
-
Substation automation requiring relay-to-relay communication
-
Power system protection and coordination
-
Teleprotection schemes for transmission lines
-
Industrial control systems with distributed relay networks
FAQ
-
Q: What communication standard does the UR77H support? A: It complies with IEEE C37.94 for inter-relay communication.
-
Q: How many channels are available? A: The UR77H provides 2 fiber-optic channels.
-
Q: What wavelength does the module operate at? A: It uses 820 nm multimode fiber optic transmission.
-
Q: Is the UR77H suitable for teleprotection? A: Yes, it is specifically designed for fast tripping and teleprotection applications.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Redundant Automation Systems: Ensuring Continuous Uptime in Critical Control Infrastructure
System reliability directly determines operational profitability across high stakes process industries. Modern industrial automation platforms must eliminate single points of failure to prevent catastrophic shutdowns. Deploying fault tolerant architecture safeguards complex facilities against unexpected hardware glitches, network disruptions, and maintenance outages.
Understanding Types of Noise in Electronic Circuits and Control Systems
Signal integrity directly determines measurement accuracy and loop stability across industrial automation environments. Electronic noise introduces unwanted stochastic interference into analog loops, sensor feedback lines, and digital fieldbus networks. Understanding how intrinsic electronic noise and external electromagnetic interference manifest allows control engineers to optimize signal conditioning and shield sensitive instrumentation effectively.
Why 24V DC Power Supplies Standardize Modern Industrial Automation
Industrial control cabinets worldwide rely on 24V DC as the universal power standard for field instrumentation, sensors, and controllers. Walk into any manufacturing plant, and you will find PLCs, human-machine interfaces (HMIs), and smart actuators running on extra-low voltage DC. Standardizing on 24V DC enhances operational safety, lowers cabinet footprint, and maintains steady control performance across factory networks.