ABB REF620E_F | Relay Replacement | Ordering Code Compatibility Guide

Description

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3. Key Technical Specifications

4. Product Introduction

The ABB REF620E_F NBFNAAAANDA1BNN1XF is a dedicated feeder protection and control relay from the Relion® 620 series, engineered for medium-voltage utility substations and industrial power distribution systems. This IED (Intelligent Electronic Device) delivers comprehensive protection, control, measurement, and monitoring functions for radial, ring, and mesh distribution networks.The “-E_F” variant indicates an enhanced hardware revision with specific support for distributed generation (DG) applications, making it ideal for modern grids with renewable energy integration. The REF620E_F is designed from the ground up to fully leverage the IEC 61850 standard for substation automation communication and interoperability.Key Application Areas:

• Utility distribution substations
• Industrial power systems
• Networks with distributed generation (solar, wind, etc.)
• Isolated neutral, resistance grounded, or impedance grounded networks

Unique Features:

• Six configurable setting groups for flexible operation
• Drawer-type design for easy installation and maintenance
• Underground and overhead cable fault detection (CFD)
• Advanced inter-station communication for ring mesh network protection
• Large graphic display with customizable single line diagram (SLD)

We supply genuine new surplus units with factory documentation and traceable serial numbers.

5. Troubleshooting Quick Reference

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Closing Suggestion: If the above steps do not isolate the issue, we recommend contacting technical support with:

• A video/photo of the fault symptom
• A screenshot of the Event Log or Diagnostic Buffer
• The relay configuration file (.IED or .620) if exportable

Our engineers will respond within 2 hours.

6. Frequently Asked Questions (FAQ)

Q1: What’s the difference between REF620E_F, REF615, and REF620 ANSI variants?A: Good question. All belong to ABB’s protection relay family, but serve different market standards and applications:表格

Key Differences:

• REF620E_F has enhanced DG (distributed generation) capabilities
• Communication protocols and protection algorithms differ
• Setting group configurations vary between IEC and ANSI versions

Recommendation: When replacing an existing unit, match the model variant and ordering code exactly. If substitution is necessary, contact ABB technical support to verify compatibility before installation.Q2: Does the REF620E_F support hot-swapping in a live system?A: No, it does not. The REF620E_F is a protection-critical device; you must de-energize the protection circuit before replacement. In my experience, attempting a hot-swap risks:

1. Damaging the terminal block connectors
2. Causing unintended trip signals to the circuit breaker
3. Creating communication faults on the station bus

The drawer-type design does facilitate quicker replacement once the system is safely de-energized. If your application requires zero downtime, consider configuring a redundant protection scheme with parallel relays.Q3: Is this model still in production? Can I get genuine parts?A: The REF620E_F remains supported by ABB as part of the Relion® 620 series, though newer variants like the REF615R have been introduced with enhanced features. Market supply breaks down as follows:

• Factory New: Available with 10-14 week lead time at premium pricing
• Our Inventory: New Surplus — legitimate, unused units from authorized distribution channels
• Verification: We provide original factory packing slips, serial numbers (verifiable with ABB), and sealed anti-static packaging

One warning I give all customers: Many “new” units on the open market are actually refurbished. Always request factory proof documents before purchasing.Q4: Will I lose my protection settings when replacing the relay?A: Not if you prepare correctly. The REF620E_F stores configuration in non-volatile memory, but best practice requires:

1. Before removal: Export the full configuration using ABB 620 Series Manager or PCM600 software
2. Document: Photograph the local HMI settings and DIP switch positions
3. After installation: Download the saved configuration to the new unit
4. Verify: Run commissioning tests to confirm proper operation

In a 2024 substation project I reviewed, an engineer skipped the backup step. The replacement relay came with factory defaults, causing a 6-hour delay while they reconstructed the protection logic from scratch. Don’t let that happen to you.Q5: What distributed generation features does the REF620E_F support?A: The REF620E_F is specifically designed for networks with distributed generation. Key DG features include:

• Anti-islanding Protection: Detects grid disconnection and prevents islanded operation
• Synchronization Check: Ensures proper synchronization before connecting DG sources
• Frequency and Voltage Ride-Through: Complies with grid code requirements
• Directional Protection: Distinguishes between fault currents from grid vs. DG sources
• Adaptive Settings: Six setting groups allow different configurations for varying grid conditions

This makes the REF620E_F ideal for solar farms, wind installations, and industrial facilities with on-site generation.Q6: What is the warranty period? What if it fails?A: We provide a 12-month warranty (calculated from the shipping date).Covered:

• Inherent hardware faults (non-human damage)
• Functional anomalies caused by factory defects

Not Covered:

• Human-caused damage (drops, water ingress, ESD)
• Operation outside specifications (overvoltage, extreme temperatures)
• Force majeure (lightning strikes, grid surges)

After-Sales Process:

1. Contact us with a fault description (photos/videos are ideal)
2. We provide remote diagnostic assistance
3. If hardware failure is confirmed:
   • Within 7 days: No-questions-asked return/exchange
   • Within 1 year: Free replacement with a tested unit
   • After 1 year: Paid repair or discounted replacement

Q7: Your prices are lower than factory list price. Are these refurbished?A: Absolutely not. I understand the concern, so let me explain where the savings come from:Price Advantages:

1. Global sourcing bypasses multiple distributor markups
2. Bulk purchasing power from utility decommissioning projects
3. Online sales model with lower overhead
4. High-volume, low-margin strategy

How to Verify New Condition:

• We provide photos of factory anti-static bags
• We supply original packing slips and factory labels
• Serial numbers are provided for verification with ABB
• QC test reports are included with each shipment

Price Comparison Example:

• Factory New: $4,200 (12-week lead time)
• Us (New Surplus): $3,100 (In stock, 3-5 day shipping)
• Refurbished: $2,000 (High risk; we do not sell these)

Q8: Can you provide a commercial invoice and customs documentation?A: Yes, we provide full commercial invoices and export documentation.Invoice Details Needed:

• Full Company Name
• Tax ID / VAT Number
• Billing Address & Phone
• Bank details (if required for specific tax documentation)

Export Documentation:

• Certificate of Origin (if required for your country)
• Packing List with serial numbers
• QC Test Report

Timeline: Issued within 2 business days of payment receipt. For shipments to regions with strict import controls (e.g., certain Middle East or South American countries), allow an additional 3-5 days for customs compliance review.

Contact info

• WhatsApp: +86 18030182217
• Email: sandydcsplc@gmail.com
• Phone: +86 18030182217
• Wechat: +86 18030182217
• Website: www.xiongbaparts.com