How to Select, Configure, and Source the ABB REF610C11LCLR Protection Relay

Implementing a protection relay like the ​ABB REF610C11LCLR​ successfully requires careful planning beyond the initial selection. This guide provides a practical, step-by-step approach for engineers and technicians, covering the key considerations for selection, configuration, and the crucial step of sourcing authentic components.

Step 1: Pre-Selection - Is the REF610C11LCLR the Right Fit?

Before specifying this model, confirm it meets your application's needs.

​1. Verify System Parameters​

• ​Rated Current:​​ Ensure the relay's current input matches the secondary current of your Current Transformers (CTs) (typically 1A or 5A).
• ​Power Supply:​​ The "1L" in the model number ​REF610C11LCLR​ typically indicates a 110/120V AC/DC power supply. Verify this matches your panel's auxiliary supply voltage. Using an incorrect voltage can destroy the unit.

​2. Assess Required Protection Functions​

The REF610 provides comprehensive feeder protection (overcurrent, earth fault, thermal). If your project requires more advanced functions like voltage protection, frequency protection, or arc flash detection, you may need to consider a different relay in the ABB portfolio.

Step 2: Configuration and Setting Calculations

​Warning:​​ Relay configuration should only be performed by qualified protection engineers.

​1. Use the Correct Engineering Tool​

The REF610C11LCLR is configured using ABB's ​PCM600​ software. You will need the appropriate IED Package (device description file) for the REF610 series loaded in PCM600.

​2. Calculate Protection Settings​

This is the most critical engineering task. Settings must be calculated to ensure selectivity, sensitivity, and speed. Key calculations include:

• ​Overcurrent Settings (51):​​ Determine the pickup current and the correct time-current curve (e.g., IEC Standard Inverse, Very Inverse) to coordinate with upstream and downstream devices.
• ​Instantaneous Overcurrent (50):​​ Set above the maximum anticipated fault current at the next downstream device to avoid false trips.
• ​Earth-Fault Settings (51N):​​ Similar to phase overcurrent, but settings are typically much lower due to lower fault current levels.

These calculations are based on a detailed study of your electrical network's short-circuit levels and coordination requirements.

​3. Configure Communications​

Assign an IP address to the relay if using Ethernet communication. Map the data points (measured values, alarm signals) that need to be sent to the SCADA system via IEC 61850 or Modbus.

Step 3: Sourcing and Procurement Best Practices

To avoid counterfeit products and ensure reliability, follow these guidelines.

​1. Source from Authorized ABB Distributors​

Always purchase the ​REF610C11LCLR​ from an ​authorized ABB distributor. This is the only way to guarantee you receive a genuine, new product that meets all specifications and is covered by ABB's warranty. Counterfeit relays pose a severe safety risk and may not operate correctly during a fault.

​2. Verify the Exact Part Number​

The complete part number is ​ABB REF610C11LCLR. Double-check this exact code with your supplier. Even a single character's difference can indicate a different power supply or functionality, leading to incompatibility.

​3. Check Lifecycle Status​

Consult ABB's official product documentation to check the lifecycle status (Active, Classic, Limited). This helps in planning for long-term support and future spares.

Step 4: Installation and Commissioning

1. ​Safe Installation:​​ De-energize the panel before mounting the relay and wiring the CTs. Correct CT wiring is vital; an open-circuited CT can be dangerous.
2. ​Primary Injection Test:​​ The most important commissioning test. Use a test set to inject current into the CT circuits to verify that the relay measures accurately and trips the correct breaker at the defined settings.
3. ​Functional Testing:​​ Test all configured functions, including communication to the SCADA system.

Conclusion

Successfully deploying the ​ABB REF610C11LCLR​ involves a methodical process from selection and configuration to sourcing and testing. By prioritizing accurate technical specification and insisting on genuine components from authorized channels, you ensure the relay will perform its critical protective role reliably for years to come.