ABB REM615E_H medium-voltage protection relays

The following is an analysis of the core technologies of the ABB REM615E_H medium-voltage protection relay:

Core Positioning

Model: REM615E_H

Series: ABB Relion® 615 High-Density I/O Line Protection Relay

Suffix Meaning:

E: Standard Hardware Platform

H: High-Density I/O (Input/Output Point Expansion)

Key Features and Benefits (vs. REM615E_G)

Features REM615E_G REM615E_H

I/O Capacity Standard Configuration (approximately 12 DI + 8 DO) High-Density Configuration (≥ 24 DI + 16 DO)

Control Capabilities Basic Logic Control Complex Automation Control (Multi-Loop Interlocking)

Installation and Expansion Single-Slot Module Supports Expansion Modules (Occupies Additional Slots)

Typical Applications Conventional Line Protection Integrated systems requiring a large number of DI/DO switches

Note: For specific I/O numbers, refer to the ABB manual (document library).

Core Function Enhancements

Expanded Control Capabilities

Digital Inputs (DI): Monitor additional statuses (circuit breaker position, pressure signals, external alarms, etc.)

Digital Outputs (DO): Control multiple trip/close circuits, turbine start/stop, signal reset, etc.

Programmable Logic: Implement complex interlocking (such as busbar sectionalizer automatic switching) via an IEC 61131-3 PLC.

Retain all protection functions.

Distance protection, overcurrent/ground fault protection, automatic reclosing (ARC).

Voltage/frequency protection, fault recording.

Communication Protocols

Fully supports IEC 61850 Ed2 (GOOSE/SV), Modbus TCP, and DNP3.0.

Design Highlights

Modular Expansion:

Supports plug-in I/O expansion modules (e.g., DI-16 module, DO-8 module).

Supports up to three expansion slots (reserved installation space required).

Engineering Compatibility:

Same PCM600 engineering files are configurable for both standard (E_G) and high-density (E_H) versions.

Hardware pin definitions are consistent with E_G, simplifying replacement and upgrades.

Typical Application Scenarios

Multi-branch switch station: Centralized protection of multiple outgoing lines in a single cabinet (reducing the number of relays).

Industrial process control:

Motor group interlock protection (e.g., cement plant fan system).

Comprehensive control of large compressors.

Smart power distribution room:

Integrated temperature control, lighting, and security signals (monitored via digital outputs).

Remote reset of multiple devices (controlled via digital outputs).

New energy booster station:

PV inverter cluster status acquisition and control.