Description
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Product Introduction
When your substation busbar needs microsecond-level fast fault response to isolate short-circuit faults before they cause catastrophic grid damage, this relay acts as the core protection gatekeeper for the entire substation bus system.
It features advanced CT saturation detection and compensation technology that maintains protection stability even under severe through-fault CT saturation conditions. Its native IEC 61850 support enables seamless integration with modern digital substation automation systems, supporting GOOSE-based fast inter-tripping across the entire substation.
ABB REB670 1MRK002820-AC
ABB REB670 1MRK002820-AC
Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | REB670 1MRK002820-AC |
| Product Type | Numerical Busbar Protection Relay |
| Protection Principle | Configurable high-impedance / low-impedance differential protection |
| Maximum Supported Bays | Up to 10+ independent bays, fully configurable |
| Core Protection Functions | Busbar Differential (87B), Breaker Failure (50BF), End Fault Protection |
| CT Compatibility | Supports mixed CT ratios and characteristics, built-in CT supervision |
| Communication Protocols | IEC 61850 (GOOSE, MMS), IEC 60870-5-103/104, DNP3.0 |
| Operating Temperature Range | -25°C ~ +70°C |
| Protection Trip Time | ≤15ms for internal busbar faults |
| Isolation Strength | ≥2kV AC full channel isolation |
| Safety Certification | TÜV Rheinland IEC 61850 functional safety certified |
ABB REB670 1MRK002820-AC
Field Application & Technical Pitfalls
Critical Industrial Scenarios
- **110kV/220kV Urban Substation Protection: Acts as the core busbar protection device for urban high-voltage substations, ensuring fast and reliable isolation of busbar short-circuit faults to minimize power outage scope.
- **Large Industrial Plant Substation Control: Provides dedicated busbar protection for heavy industrial enterprise self-owned substations, preventing production-wide power outages caused by busbar faults.
- **Renewable Energy Grid Connection Substation Protection: Executes busbar differential protection for large wind farm and solar power station grid-connected substations, maintaining grid stability under fluctuating power output conditions.
Non-Negotiable Technical Pitfalls
- ⚠️ Bold Warning 1: Never connect non-matching CT secondary circuits directly to this relay. The third bay input channel will experience differential current imbalance that causes false protection trips.
- ⚠️ Bold Warning 2: Skipping the pre-commissioning differential current balance test will leave you with hidden protection dead zones. This unit must complete full CT circuit polarity and balance verification to achieve rated 15ms fast tripping performance.
- ⚠️ Bold Warning 3: Do not disable the built-in CT saturation supervision function in the configuration software. The relay will lose stability during severe through-faults, leading to unwanted protection operation.
A regional power substation maintenance team once swapped a REB670 relay and skipped the differential balance test. The 12% unbalanced differential current caused the busbar protection to falsely trip during a through-fault, resulting in a 2-hour substation full blackout that affected over 30,000 local users.
ABB REB670 1MRK002820-AC
Quality Control (QC) SOP & Transparency
- Inbound Verification: Cross-check the OEM serial number against ABB’s official part registry, confirm the part number REB670 1MRK002820-AC matches the factory label, and inspect no damage to all CT input and communication connectors.
- Live Rig Testing: Power the unit in a calibrated substation protection test platform, apply standard CT secondary signals, and confirm 2 full hours of stable differential protection logic operation.
- Parameter Testing: Verify 15ms fast tripping performance meets factory specifications, confirm IEC 61850 GOOSE communication functions operate correctly, and validate all protection logic and self-diagnostic indicators function properly.
- Final QA & Packaging: Seal the tested relay in a static-shielding anti-static bag, attach a unique QC passed serial label, and nest it in foam padding inside a rigid industrial shipping carton.
Frequently Asked Questions (FAQ)
- Can I hot-swap this relay while the substation protection system is running? No. You must first place the busbar protection in complete bypass mode before removing the unit, otherwise you will lose all busbar protection functions.
- What exact ABB systems is this relay compatible with? It works natively with ABB REB670 series protection platforms and ABB Ability digital substation automation systems. It will not operate correctly with legacy non-IEC 61850 substation systems without a custom protocol gateway.
- How long is the standard warranty for this new surplus unit? 12 months from delivery. It covers all manufacturing defects, but does not extend to units damaged by overvoltage, miswiring, or improper CT circuit connection in the field.
- How do I tell a genuine OEM unit apart from a refurbished clone? Genuine ABB REB670 1MRK002820-AC relays have a laser-etched part number on the rear housing, not a printed sticker. Clone units almost always fail the 15ms fast tripping performance test.
- What is the typical lead time for shipment? In-stock units ship within 48 hours. If you require official ABB factory protection performance test documentation, add 2 extra business days to the turnaround window.
- Can this relay replace the older REB500 legacy busbar protection unit? Well, technically it fits the same standard 19-inch substation panel cutout, but you will need to reconfigure all bay parameters, CT ratios and differential protection settings to maintain full protection performance.
اكتشف 【REB670 1MRK002820-AC】 الآن، الخيار الأمثل بجودة عالية وسعر مناسب. يتميز بأداء موثوق وتصميم عملي، مع شحن سريع ودفع آمن وخدمة عملاء موثوقة. تواصل معنا الآن للحصول على عرض سعر مفصل، وسنرد عليك خلال ساعة واحدة.
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