ABB REG615 Relion 615 Series Protection Relay

Configured for generator and interconnection point protection in public and industrial power networks, the ABB REG615, also cataloged as the REG615 Generator Protection Relay, provides direct physical/electrical execution. The device executes continuous monitoring, measurement, and control of generator units and distributed power access points during startup, normal operation, and islanding conditions. It processes CT/PT secondary currents and voltages or sensor inputs to execute fast trip decisions, managing dynamic grid stability across solar, wind, diesel, gas, hydro, and thermal power platforms.

Hardware Specifications

Deterministic Backplane & EtherNet Network Integration

The protection unit incorporates ABB proprietary backplane communication velocity Licences and deterministic networking protocols to ensure synchronized data exchange across substation automation architectures. Fully supporting IEC 61850 Editions 1 and 2, including GOOSE messaging and process bus sample values (IEC 61850-9-2 LE), the hardware achieves low-latency fault cleared execution. Native implementation of Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR) guarantees zero-switchover-time network failover across dual Ethernet paths, while IEEE 1588 v2 clock synchronization maintains sub-microsecond timestamp alignment across time-critical protection events.

Frequently Asked Questions

Q: How does the plug-in unit design of the REG615 affect field testing and maintenance?

A: The draw-out chassis design enables quick installation, secondary injection testing, and unit replacement without disturbing permanent CT/PT terminal wiring or cabinet backplane cabling.

Q: Can the REG615 protection relay communicate over PROFIBUS DPV1 networks?

A: Yes. While the relay natively supports IEC 61850, Modbus, DNP3, and IEC 60870-5-103, integration into PROFIBUS DPV1 networks is accomplished using the SPA-ZC 302 protocol adapter.

Q: How does the REG615 execute island grid detection for distributed energy access?

A: The relay continuously monitors grid voltage, frequency, and phase parameters at the interconnection point, triggering automatic trip commands to isolate distributed generators when utility grid connection parameters collapse.

Field Installation Guidelines

1. CT/PT Secondary Circuit Safety: Before inserting or removing the relay draw-out unit, ensure current transformer (CT) secondary circuits are properly shorted via external test switches to prevent destructive high-voltage inductive spikes.
2. Grounding & Shield Termination: Secure the relay enclosure frame directly to the panel earth bar. Ensure grounding braids maintain a low-impedance path with at least 5 full thread engagements on M4/M5 ground studs.
3. Ethernet & Fiber Wiring Radius: Observe the minimum bend radius when routing redundant Ethernet (PRP/HSR) copper or optical cables. Keep control wiring physically isolated from high-voltage AC current inputs to eliminate cross-talk noise.
4. Flush-Mount Mechanical Alignment: Position the outer casing squarely within the panel cutout. Tighten panel clamping screws uniformly to prevent mechanical warping of the internal chassis connector pins during insertion.