Introduction; About This Manual; The Use Of The Relay; Features - ABB REM 610 Technical Reference Manual

REM 610
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Motor Protection Relay
Technical Reference Manual

Introduction

About this manual

This manual provides thorough information on the protection relay REM 610
Revision B and its applications, focusing on giving a technical description of the
relay. For more information about earlier revisions, refer to section Revision history.
Refer to the Operator's Manual for instructions on how to use the
Human-Machine Interface (HMI) of the relay, also known as the Man-Machine
Interface (MMI), and to the Installation Manual for installation of the relay.

The use of the relay

REM 610 is a versatile multifunction protection relay mainly designed to protect
motors in a wide range of motor applications.
REM 610 is based on a microprocessor environment. A self-supervision system
continuously monitors the operation of the relay.
The HMI includes a Liquid Crystal Display (LCD) which makes the local use of the
relay safe and easy.
Local control of the relay via serial communication can be carried out with a
computer connected to the front communication port. Remote control can be carried
out via the rear connector connected to the control and monitoring system through
the serial communication bus.

Features

• Three-phase thermal overload protection
• Three-phase motor start-up supervision based on thermal stress calculation with
speed switch blocking ability
• Three-phase overcurrent protection with definite-time characteristic and speed
switch blocking ability
• Three-phase short-circuit protection with instantaneous or definite-time
characteristic
• Three-phase undercurrent (loss of load) protection with definite-time
characteristic
• Non-directional earth-fault protection with definite-time characteristic
• Three-phase unbalance protection based on the negative-phase-sequence current
with inverse definite minimum time characteristic
• Phase reversal protection based on the negative-phase-sequence current
• Cumulative start-up time counter with restart inhibit function
• Circuit-breaker failure protection
• Temperature protection stages with definite-time characteristic
• Emergency start function
• Optional RTD module
• with six measuring inputs
• supports PTC thermistors and various RTD sensors
1MRS 752263-MUM