GE UR7HH – Inter-Relay Communications Module | UR Series Protection Platform
Engineering Background
The GE UR Series (Universal Relay) is GE Grid Solutions’ flagship platform for numerical protection, control, and monitoring of power system equipment. Designed for utility-grade substation environments, the UR platform supports modular hardware architecture, allowing engineers to configure relay functionality precisely to application requirements. The UR7HH is a dedicated inter-relay communications module that enables high-speed, deterministic peer-to-peer data exchange between UR Series devices — a critical capability in modern protection schemes such as busbar differential, line current differential, and breaker failure logic.
Product Positioning
The UR7HH is engineered for protection engineers and substation automation specialists who require reliable, low-latency inter-relay communication without dependence on external communication infrastructure. It integrates natively into the UR chassis backplane and supports IEC 61850 GOOSE messaging and direct fiber-optic peer-to-peer links, making it suitable for both legacy and next-generation digital substation architectures.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | UR7HH / UR 7HH |
| Platform | GE UR Series (Universal Relay) |
| Module Type | Inter-Relay Communications Module |
| Communication Protocol | IEC 61850 GOOSE, Direct Peer-to-Peer (UR-to-UR) |
| Physical Interface | Fiber-optic (ST connector, multimode) |
| Data Transfer Rate | High-speed deterministic (sub-cycle latency) |
| Chassis Compatibility | GE UR Series (C30, C60, C70, D60, F35, F60, L30, L60, L90, M60, N60, T35, T60, etc.) |
| Backplane Interface | UR Series internal backplane bus |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% non-condensing |
| Power Supply | Supplied via UR chassis backplane |
| Dimensions | Standard UR module form factor |
| Weight | Approx. 1,200 g |
| Compliance | IEC 61850, IEEE C37.90, CE, UL |
| Country of Origin | USA / Canada (GE Grid Solutions) |
Proven Application Environments
- Line Current Differential Protection (87L): Enables high-speed current differential schemes between line terminals using direct fiber or multiplexed channels.
- Busbar Differential Protection (87B): Supports multi-terminal busbar protection with deterministic inter-relay data exchange.
- Breaker Failure & Transfer Trip: Provides sub-cycle GOOSE-based trip signal propagation for breaker failure initiation and remote trip schemes.
- Transformer Differential (87T): Coordinates multi-winding transformer protection across multiple UR relays.
- Digital Substation Integration: Fully compatible with IEC 61850 process bus and station bus architectures.
- Utility Transmission & Distribution Substations: Deployed in 110 kV–500 kV substation environments globally.
- Industrial Power Systems: Suitable for large industrial facilities with complex protection coordination requirements.
Engineering Advantages
- Sub-Cycle Latency: Direct fiber peer-to-peer links achieve deterministic communication latency well below one power cycle, critical for high-speed protection.
- IEC 61850 GOOSE Native Support: Eliminates the need for hardwired pilot channels in many applications, reducing installation cost and complexity.
- Modular Hot-Swap Architecture: UR Series modular design allows module replacement without full relay disassembly, minimizing maintenance downtime.
- Redundant Communication Paths: Supports redundant fiber links for enhanced reliability in critical protection schemes.
- Seamless UR Platform Integration: Plug-and-play compatibility with all UR Series relay models — no external converters or protocol gateways required.
- Proven Field Reliability: GE UR Series modules are deployed in thousands of substations worldwide with documented MTBF exceeding 20 years.
System Architecture & Signal Flow
The UR7HH module occupies a dedicated slot in the UR Series chassis and communicates with the relay CPU module via the internal backplane bus. Externally, it interfaces with peer UR relays via fiber-optic ST connectors. In an IEC 61850 environment, GOOSE messages are published and subscribed over the station LAN, while direct UR-to-UR links provide a deterministic backup or primary channel independent of Ethernet infrastructure.
Typical Signal Flow:
- Protection element asserts trip/block signal within local UR relay CPU.
- CPU passes signal to UR7HH module via backplane bus.
- UR7HH encodes and transmits signal over fiber link or GOOSE message to peer relay(s).
- Receiving UR7HH decodes signal and passes to peer relay CPU within sub-cycle timeframe.
- Peer relay executes protection action (trip, block, initiate BF, etc.).
Sourcing & Quality Verification
- Authentic GE Grid Solutions Hardware: All UR7HH modules sourced by Konmask.com are genuine GE-manufactured components, not third-party clones or refurbished units of unknown provenance.
- Pre-Shipment Inspection: Each module undergoes visual inspection, label verification, and functional continuity checks prior to dispatch.
- Traceability Documentation: Original GE part labels, serial numbers, and where available, factory test records are preserved and provided upon request.
- Packaging Integrity: Modules are shipped in ESD-safe packaging with appropriate cushioning to prevent transit damage.
- Warranty: 12-month replacement warranty against manufacturing defects under normal operating conditions.
Procurement Process
- Inquiry & Confirmation: Contact Konmask.com via email or phone with your required part number (UR7HH), quantity, and delivery timeline.
- Quotation: Receive a formal quotation within 1 business day including unit price, lead time, and shipping options.
- Order Placement: Place order via the Konmask.com online store or via purchase order for B2B accounts.
- Payment: Secure payment via T/T bank transfer, credit card, or agreed B2B terms.
- Dispatch & Tracking: Orders dispatched within 1–3 business days. Full tracking information provided upon shipment.
- After-Sales Support: Technical support available post-delivery for installation verification and compatibility queries.
Technical FAQ
Q: Is the UR7HH compatible with all UR Series relay models?
A: Yes. The UR7HH is designed for the universal UR chassis backplane and is compatible with all standard UR Series relay models including C30, C60, C70, D60, F35, F60, L30, L60, L90, M60, N60, T35, and T60.
Q: Can the UR7HH be used for IEC 61850 GOOSE-only applications without direct fiber links?
A: Yes. The module supports IEC 61850 GOOSE messaging over Ethernet independently of the direct fiber peer-to-peer interface.
Q: What fiber type and connector does the UR7HH use?
A: The UR7HH uses multimode fiber with ST-type connectors. Verify your site’s fiber plant compatibility before installation.
Q: Is firmware upgrade required when installing a replacement UR7HH?
A: The module firmware is managed by the UR relay CPU. Upon insertion, the CPU will verify and if necessary update the module firmware automatically. Consult the GE UR Series Instruction Manual for your specific relay model.
Q: Does Konmask.com provide installation support?
A: Konmask.com provides pre-sales technical consultation and post-sales support for compatibility and installation queries. On-site commissioning services are not included but can be arranged through GE-authorized service partners.
Q: What is the lead time for the UR7HH?
A: In-stock units ship within 1–3 business days. For out-of-stock inquiries, contact us for current lead time estimates.
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