1MRS 752264-MUM
Motor Protection Relay
Operator’s Manual
REM 610
5
1. Introduction
1.1.
About this manual
This manual provides basic information on the protection relay REM 610 Revision
B and presents detailed instructions on how to use the Human-Machine Interface
(HMI) of the relay, also known as the Man-Machine Interface (MMI). In addition to
the instructive part, a short chapter on commissioning and maintenance of the relay
is included.
1.2.
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.
1.3.
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
• three additional galvanically isolated digital inputs
