ABB REF615

The ABB REF615 is a member of the Relion® 615 series, designed for feeder protection, control, and monitoring in utility and industrial power distribution systems. Below are its key technical parameters:

Protection Functions

Overcurrent Protection (50/51, 50N/51N)

Earth Fault Protection (50G/51G, 67N)

Directional Overcurrent (67, 67N)

Thermal Overload Protection (49)

Negative Sequence Overcurrent (46)

Under/Overvoltage (27/59)

Under/Overfrequency (81U/81O)

Circuit Breaker Failure Protection (50BF)

Arc Protection (optional, via I/O module)

Control & Monitoring

Binary Inputs (BI): Up to 12 (configurable)

Binary Outputs (BO): Up to 8 (relay outputs)

Analog Inputs (AI): 4 current & 4 voltage inputs (standard)

Metering:

1. Current, voltage, power (P, Q, S), energy (Wh, VAh), frequency, THD

2. Accuracy: Class 0.5 (current/voltage), Class 1 (power)

Communication Interfaces

IEC 61850-8-1 (GOOSE, MMS)

Modbus RTU (RS485)

Modbus TCP/IP (Ethernet)

IEC 60870-5-103 (optional)

DNP3.0 (optional)

IEC 104 (optional)

Mechanical & Dimensions

Housing: 1/2 19-inch rack (6U)

Weight: ~ 4.5 kg

Mounting: Panel or DIN-rail

Certifications

CE, UL, IEC 60255, IEC 61000-4 (EMC immunity)

Additional Features

Disturbance Recorder (up to 128 events)

Event Logging (1000 events)

Time Synchronization: IRIG-B, SNTP, PPS

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