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ABB REA 101 User Manual

ABB REA 101
20 pages
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Arc Protection Relay
Product Guide
REA 10_
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ABB REA 101 Specifications

General IconGeneral
Frequency50/60 Hz
Max Switching Current5 A
MountingDIN rail or screw mounting
Contact Rating5 A at 250 V AC
Operating Temperature-25 to +55 °C
Protection ClassIP20

Summary

Arc Protection Relay Features and Application

Product Features

Details key capabilities: sensor types, tripping outputs, operate time, and compensation methods.

Application Context

Explains consequences of arcing, sources, and the need for fast fault clearance in switchgear.

Arc Protection Relay Design Principles

REA 101 Central Unit Design

Describes the design of the REA 101 including overcurrent detection and measurement methods.

Light Detection Mechanism

Explains how light is captured, amplified, and compared to a reference level for arc detection.

Trip Output Capabilities

Describes the high-speed semiconductor and relay outputs for tripping functions.

Extension Unit Connectivity

Explains the function and protection of Ports A and B for connecting extension units.

Circuit-Breaker Failure Protection

Explains the CBFP feature, its activation, and delay options for tripping outputs.

Self-Supervision Unit Functionality

Covers monitoring of operating voltages, sensor fibers, and fault indication for system reliability.

Technical Data and Specifications

Current Input Specifications

Details rated current, load current, momentary current, dynamic withstand, impedance, and frequency.

Output Contact Ratings

Provides voltage, carry, and breaking capacity for trip and signal contacts.

Circuit-Breaker Failure Protection Delays

Lists selectable operate time delays and their accuracy for CBFP.

Setting Range Parameters

Lists current and neutral current setting steps and operation accuracy.

Total Operate Time Metrics

Specifies total operate times for HSO1/HSO2 and TRIP3 outputs.

Arc Protection Relay Dimensions and Mounting

Ordering Information and Components

Order Specification Guide

Lists essential information to provide when placing an order, including quantity and accessories.

REA 10 Order Numbers

Provides specific order numbers for REA 101 relays and extension units.

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