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The ABB REF615E is a high-performance, multifunctional feeder protection and control relay designed for medium-voltage distribution networks. As a core member of ABB's Relion® 615 series, the REF615E provides comprehensive protection, control, measurement, and supervision capabilities for overhead lines and cable feeders in utility substations and industrial power systems .

The ABB REF615E supports various network topologies including radial, looped, and meshed configurations, with or without distributed power generation. This versatile relay ensures selective fault detection, rapid tripping, and seamless integration with modern substation automation systems 

The REF615E offers advanced protection capabilities including:

Overcurrent Protection: Directional and non-directional phase overcurrent (PTOC, 51/67) with multiple stages

Earth-Fault Protection: Directional/non-directional earth-fault, admittance-based, wattmetric-based, and harmonics-based options

Voltage Protection: Overvoltage, undervoltage, residual overvoltage, positive-sequence undervoltage, negative-sequence overvoltage

Frequency Protection: Overfrequency, underfrequency, and rate-of-change (available in configurations H and J)

Arc-Fault Protection: Optional three-channel light detection for circuit breaker, busbar, and cable compartments

Auto-Reclosing: Three-pole multi-shot auto-reclose functions for overhead line feeders 

Configuration Steps

Software Setup: Install ABB PCM600 (Ver.2.4 SP1 or later) with REF615 Connectivity Package (Ver.4.0 or later)

Communication Configuration: Configure IEC 61850, Modbus, DNP3, or IEC 60870-5-103 protocols based on your SCADA requirements

Protection Settings: Utilize template libraries to configure overcurrent, earth-fault, and voltage protection parameters

Signal Matrix Configuration: Use the graphical signal matrix to customize logic functions and I/O mappings

Firmware Update: Upload the latest firmware package to ensure optimal performance and cybersecurity

Daily Operation

Monitor the large LCD display showing single-line diagrams for real-time status

Use the REF615E built-in self-diagnostics to check relay health and communication integrity

Access event logs with 1ms resolution for detailed fault analysis

Pre-Installation Requirements

Mount the ABB REF615E in a clean, dry switchgear compartment with ambient temperature below 70°C

Ensure minimum 50mm clearance around the relay for proper ventilation

Use M4 screws for panel mounting or standard 35mm DIN rail for withdrawable installation

Wiring Instructions

Current Transformers: Connect CTs with 1A/5A ratios using copper conductors (minimum 2.5mm²)

Voltage Transformers: Connect VTs with 100V secondary

Communication Cables: Use shielded twisted-pair cables (0.5 mm²) for analog signals, grounding shields at both ends to reduce EMI

Grounding: Ensure proper grounding per IEC 61000 standards to minimize electromagnetic interference

Pre-Energization Checks

Verify insulation resistance (>100 MΩ at 500V DC)

Check all terminal connections for tightness

Confirm CT/VT polarity and ratio settings match the REF615E configuration

Commissioning Procedures

Hardware Verification: Confirm compatibility with PCM600 V2.11 or later

Firmware Upload: Install the latest firmware package specific to your REF615E variant

Parameter Configuration: Load protection settings using standardized templates

Primary Injection Testing: Validate current and voltage inputs

Communication Testing: Verify IEC 61850 GOOSE messaging and Modbus/DNP3 mappings

Protection Validation: Perform secondary injection testing to confirm trip characteristics 

Routine Inspection (Quarterly)

Inspect the REF615E for loose terminals, dust accumulation, and thermal stress signs

Clean cooling vents using compressed air

Check communication cable integrity and grounding connections

Annual Maintenance

Verify protection settings via secondary injection testing

Test relay outputs for contact resistance (<100 mΩ)

Review event logs and disturbance records

Update firmware to access latest features and security patches

Long-Term Maintenance (Every 3-5 Years)

3-Year Cycle: Calibration check of measurement circuits

5-Year Cycle: Replace backup battery (ABB part 3HAC031684-001) to maintain event logging during power loss; capacitor replacement if needed

Predictive Maintenance

The ABB REF615E supports condition-based maintenance through ABB Ability™, monitoring:

Operating temperature trends

Capacitor aging indicators

Contact wear statistics

Internal self-diagnostic results

Safety and Cybersecurity Notes

The REF615E features non-volatile memory that retains configuration during power outages—no battery backup required for settings preservation

For arc-flash protection installations, follow IEEE 1584 guidelines for sensor placement

Regularly check for cybersecurity patch notifications from ABB

Ensure only authorized personnel access the REF615E configuration interface using proper user management protocols 

REU615E Voltage protection relay complementary to REF615E

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.