ABB REC615E_G feeder protection relay

Here's a precise technical overview of the ABB REC615E_G feeder protection relay in engineering terms:

ABB REC615E_G

Relion® 615 Series | Standard Configuration Feeder Protection & Bay Controller

1. Core Specifications

Parameter Detail

Hardware Platform REC615E

Suffix "G" Standard hardware configuration (default I/O, measurement, comms)

Protection Class IEC 60255, IEEE C37.90

Order Code 1MRK 511 356-BEN (verify latest datasheet)

2. Key Protection Functions

Primary Protection:

4-zone distance protection (mho/quad characteristic)

Directional/non-directional overcurrent (50/51, 51N/67N)

Auto-reclosing (79): 1–3 shots (single/three-phase)

Backup Protection:

Breaker failure (50BF)

Thermal overload (49)

Under/overvoltage (27/59)

3. Control & Automation

Bay Control:

CB open/close commands

Disconnector/interlock logic (programmable via PCM600)

Automation Features:

GOOSE-based inter-tripping

Load shedding schemes

Sectionalizing automation

IEC 61850 process bus (Sampled Values support)

4. Hardware Configuration

Module Specification

Analog Inputs 12 current / 4 voltage (standard accuracy ±0.5%)

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

Communication 2× Ethernet (RJ45) + 2× optical (ST) + RS485

HMI 128×64 graphical LCD + keypad + status LEDs

5. Communication Protocols

Standard Functionality

IEC 61850 Ed.2 (GOOSE, MMS, Sampled Values)

DNP3.0 TCP/IP & serial

IEC 60870-5-103 Legacy serial comms

Modbus TCP/RTU

6. Typical Applications

Distribution Feeders (11–33 kV): Overhead line/cable protection

Industrial Grids: Motor feeder protection, bus-tie control

Ring Main Units (RMUs): Fault isolation in urban networks

Renewable Integration: Solar/wind collector feeder protection

7. Differentiation from REC615E_H

Feature REC615E_G REC615E_H

CT Accuracy ±0.5% (Class 0.5) ±0.2% (High-precision HCTs)

Sampling Rate 32 samples/cycle 64 samples/cycle

Cost ~15% lower Premium pricing

Use Case General feeder protection Sensitive differential protection

Engineering Notes

Feeder Differential Limitation:

Supports 87L only via fiber-optic links (requires external comms module).

Fault Recording:

8 GB internal storage for COMTRADE files (128 events).

Cybersecurity:

IEC 62351-compliant encryption for GOOSE/MMS.

Configuration:

Requires ABB PCM600 (v2.11 or later) for logic programming.

Critical Documentation:

Technical Manual: 1MRK 511 356-BEN

IEC 61850 CID Files: ABB Relion Library 615 series

Certification: KEMA, UL, CE

When to Specify REC615E_G

Budget-conscious greenfield distribution projects

Retrofitting legacy relays (REB500 compatibility)

Applications where ±0.5% measurement suffices

Schemes not requiring feeder differential protection

For high-impedance fault detection or short-cable differential, upgrade to REC615E_H.