ABB REF615E_S feeder protection relay Relion® 615 Series

Here's the technical specification for ABB REF615E_S – a specialized feeder protection relay with synchronism check and voltage monitoring capabilities:

ABB REF615E_S

Feeder Protection Relay with Synchronism Check & Voltage Monitoring

*(Relion® 615 Series | "S" = Synchronization/Voltage Focus)*

Order Code: 1MRK 002 230-BEN

1. Core Identity

Hardware Platform: REF615E

Suffix "S": Specialized for synchronism check (25), auto-synchronizing (25A), and voltage-based functions.

Key Application: Closing circuit breakers between asynchronous sources (e.g., grid/generator tie-in).

2. Key Protection & Control Functions

Category Functions

Synchronization - Synchronism check (25) (ΔV, Δf, ΔΦ)

- Auto-synchronizing (25A) (dead/bus live line charging)

Voltage Prot. Under/overvoltage (27/59), neutral voltage displacement (59N)

Feeder Prot. Directional OC (67/67N), non-directional OC (50/51), auto-reclose (79)

Control Switchgear control (SPS) with built-in interlocking

3. "S" Variant Hardware Distinction

Enhanced Voltage Inputs:

4 voltage channels (3-phase + neutral) vs. standard 3 channels in REF615E_G.

±0.2% voltage measurement accuracy (critical for sync checks).

Dedicated Sync Port:

Optical/RS485 port for generator AVR/governor communication.

Real-Time Clock (RTC):

IEEE 1588 PTPv2 support for μs-level synchronization accuracy.

4. Technical Specifications

Parameter Specification

Sync Check Settings ΔV: 0.1–50%

Δf: 0.001–1.0 Hz

ΔΦ: 1°–90°

I/O Configuration 16 DI / 10 DO (configurable)

2× analog outputs (mA) for synchroscope

Communication 2× Ethernet (IEC 61850 Ed.2 GOOSE/MMS)

1× RS485 (Modbus RTU)

IEEE 1588

Accuracy Voltage: ±0.2%

Frequency: ±0.001 Hz

Phase: ±0.5°

Standards IEC 60255, IEEE C37.90, ANSI C12.20

5. Typical Applications

Generator Tie-Ins: Safe grid synchronization for cogeneration plants.

Microgrid Interconnection: Island-to-grid reconnection.

Bus Transfer Schemes: Fast standby source switching (e.g., hospitals/data centers).

Renewables: Solar/wind farm grid synchronization.

6. Differentiation from Standard Models

Model REF615E_S REF615E_G

Key Focus Synchronization & voltage control General feeder protection

Voltage Inputs 4 channels (3Ph+N) 3 channels (3Ph)

Sync Function 25 + 25A (advanced) Basic sync check only (optional)

Dead Bus Charging Supported Not available